阅读说明：本技术 车身前部构造 (Vehicle body front structure ) 是由 松冈圣彦 芳贺辉 于 2018-05-10 设计创作，主要内容包括：本发明能够提高前方障碍物检测传感器及其周边零件的设计自由度。触地防护件(20)具有上壁(20a)、前壁(20b)、和车辆前后方向的尺寸比所述上壁(20a)长的下壁(20c),下横梁(28)呈朝向上方开口的帽形截面形状,且至少具有前侧凸缘部(29a)和底面部(29c),将上壁(20a)相对于下横梁(28)的前侧凸缘部(29a)固定,并且将下壁(20c)相对于底面部(29c)固定,在前壁(20b)安装有前方障碍物检测传感器(34)。另外,触地防护件(20)具备层差凸缘部(38),该层差凸缘部(38)具有至少从前壁(20b)连续至下壁(20c)的层差部(36)。(The invention can improve the design freedom of the front obstacle detection sensor and peripheral parts thereof. The ground contact guard (20) has an upper wall (20a), a front wall (20b), and a lower wall (20c) that is longer than the upper wall (20a) in the vehicle longitudinal direction dimension, the lower cross member (28) has a hat-shaped cross-sectional shape that opens upward, and has at least a front flange portion (29a) and a bottom surface portion (29c), the upper wall (20a) is fixed to the front flange portion (29a) of the lower cross member (28), the lower wall (20c) is fixed to the bottom surface portion (29c), and a front obstacle detection sensor (34) is attached to the front wall (20 b). The floor guard (20) is provided with a step flange portion (38), and the step flange portion (38) has a step portion (36) that extends at least from the front wall (20b) to the lower wall (20 c).)

1. A vehicle body front structure is characterized by comprising a ground guard attached to a lower cross member of a front bulkhead,

the ground contact guard has an upper wall, a front wall, and a lower wall having a longer dimension in the vehicle fore-and-aft direction than the upper wall,

the upper wall and the lower wall extend in parallel opposition to each other,

the front wall is substantially orthogonal to the upper wall and the lower wall, and connects a vehicle front end portion of the upper wall and a vehicle front end portion of the lower wall,

the lower beam is in a hat-shaped cross section shape which is opened towards the upper part and at least comprises a front side flange part and a bottom surface part,

fixing the upper wall with respect to the front flange portion of the lower cross member, and fixing the lower wall with respect to the bottom surface portion,

a front obstacle detection sensor is mounted on the front wall.

2. The vehicle body front structure according to claim 1, comprising:

a pair of left and right front side frames extending in the front-rear direction of the vehicle; and

a front partition fixed to a front end portion of the front side frame and having a pair of left and right vertical members extending in an up-down direction,

each of the longitudinal members includes:

a longitudinal member body;

a mounting extension wall extending outward in the vehicle width direction from an outer end portion in the vehicle width direction of the vertical member main body; and

a first hook piece bent rearward from an outer end portion in the vehicle width direction of the mounting extension wall and hooked and engaged with the front side frame from above,

the first hook piece includes a first vertical surface extending in a vertical direction, and a first inclined surface continuous with one of the first vertical surfaces in the vertical direction and inclined with respect to the vertical direction.

3. The vehicle body front structure according to claim 1, comprising a bracket that extends forward from the front bulkhead fixed to a front end portion of a front side frame and supports a cooling device,

the front partition is formed in a rectangular shape by a pair of right and left vertical members and a pair of upper and lower horizontal members,

the cross member on the lower side of the pair of cross members has a hat-shaped section that opens upward,

the lower end portion of the inner side wall of the longitudinal member extends into the hat-shaped cross section via the upward opening and is joined to the front wall of the cross member within the cross member via a reinforcing member,

the bracket is combined with a brim constituting the hat-shaped cross section of the cross member and is combined with the reinforcing member via the front wall of the cross member,

the bracket is formed inside and outside the vehicle width direction with the inner side wall as a center in a vehicle body main view with respect to a joint portion of the eave portion.

4. The vehicle body front structure according to claim 1, wherein the ground guard includes a stepped flange portion having a stepped portion that continues from at least the front wall to the lower wall.

5. The vehicle body front structure according to claim 1, characterized in that a drain portion for discharging electrodeposition coating liquid is formed in the upper wall and the lower wall.

6. The vehicle body front structure according to claim 1, wherein the ground guard includes a vehicle body joining portion that fixes the front obstacle detection sensor to a center portion in a vehicle width direction thereof.

7. The vehicle body front structure according to claim 6, wherein an access hole for a welding gun that forms the vehicle body engagement portion on the upper wall side is formed in the lower wall.

8. The vehicle body front structure according to claim 1, wherein the front bulkhead has a pair of left and right longitudinal members,

the front obstacle detection sensor is disposed at a center portion in the vehicle width direction,

an upper portion of the front obstacle detection sensor is fixed to the pair of left and right longitudinal members via first support members 1 extending in the vehicle width direction, respectively, and a lower portion of the front obstacle detection sensor is fixed to the ground contact guard via second support members 2 extending in the vehicle front-rear direction.

9. The vehicle body front structure according to claim 1, wherein a guide member is disposed at a vehicle front side of the dash panel,

a recessed portion into which the 2 nd brace extending in the vehicle front-rear direction is fitted is formed by recessing the guide surface of the guide member.

10. The vehicle body front structure according to claim 9, wherein a lid member that covers the recessed portion and forms the guide surface is disposed.

11. The vehicle body front structure according to claim 2, comprising a bumper beam assembly extending in a vehicle width direction and bridging between front end portions of a pair of left and right front side frames,

the vertical member has a second hook piece bent forward from the vehicle width direction outer end portion of the attachment extension wall below the first hook piece and engaged with the bumper beam assembly by being hooked from below,

the second hook piece includes a second vertical surface extending in the vertical direction, and a second inclined surface continuous with one of the second vertical surfaces in the vertical direction and inclined with respect to the vertical direction.

12. The vehicle body front structure according to claim 11, comprising a connecting plate that is fixed to a front end portion of the front side frame and connects the front side frame and the bumper beam assembly to each other,

a bent flange portion bent rearward is formed at an upper edge of the connecting plate,

the first hooking piece engages with the bent flange portion.

13. The vehicle body front structure according to claim 12, wherein the bumper beam assembly includes:

a pair of cylindrical left and right bumper beam extensions which are attached to the front end portions of the front side frames, respectively, and which are open at the front and rear; and

a pair of left and right mounting plates fixed to rear end portions of the extending portions of the bumper beam,

the mounting plate has:

an opening facing an interior of the bumper beam extension; and

a pair of upper and lower fitting ribs projecting forward from upper and lower sides of the opening and into which rear end portions of the bumper beam extension portions are fitted,

the second hook hanging piece is clamped with the upper edge of the opening.

14. The vehicle body front structure according to claim 13, comprising a joint portion where the attachment extension wall, the web, and the attachment plate are joined together,

the joint is formed between the first hook sheet and the second hook sheet.

15. The vehicle body front structure according to claim 2, comprising:

a sub-frame support portion extending downward from a front portion of the front side frame;

the first hook hanging piece temporarily fixing the longitudinal member and the front side frame; and

and a lower fixing portion that temporarily fixes the vertical member and the sub-frame support portion below the first hook piece.

16. The vehicle body front structure according to claim 14, wherein the longitudinal member main body has a recessed portion that is recessed inward in the vehicle width direction over a predetermined region in the vertical direction from a lower position than the first hook piece,

the second hook piece and the joint portion are formed on the outer side in the vehicle width direction with respect to the recessed portion.

17. The vehicle body front structure according to claim 15, wherein the side member body includes a first L-shaped cross-sectional member forming an inner wall and a rear wall, and a second L-shaped cross-sectional member forming an outer wall and a front wall, and is formed in a hollow cross section extending in a vertical direction,

the mounting extension wall is formed by extending one of the first L-shaped cross-section member and the second L-shaped cross-section member outward in the vehicle width direction relative to the other.

18. The vehicle body front structure according to claim 3, wherein the vertical member is configured such that a first L-shaped cross-sectional member forming the inner wall and a rear wall facing rearward is joined to a second L-shaped cross-sectional member forming a front wall facing forward and an outer wall facing the inner wall so as to form a hollow portion inside,

a lower end portion of the rear side wall and a lower end portion of the outer side wall extend into the cross member via the upward opening, and a flange is formed at a lower edge of the outer side wall so as to extend along a bottom wall constituting the hat-shaped cross section of the cross member,

the reinforcing member includes: a lower portion disposed along the bottom wall of the cross member; and an upper portion rising from an edge of the lower portion so as to respectively follow the inner and rear side walls of the vertical member and the front wall of the horizontal member,

the upper portion of the reinforcing member is coupled to the inner and rear side walls of the longitudinal member and the front wall of the cross member, respectively,

the lower portion of the reinforcement member extends between and is sandwiched between the flange of the outer side wall and the bottom wall of the cross member.

19. The vehicle body front structure according to claim 3, wherein the bracket has bent flanges extending in a vehicle front-rear direction on both sides of an extension portion extending forward from the cross member.

20. The vehicle body front structure according to claim 3, wherein the bracket has a mounting portion that supports a lower portion of a cooling apparatus,

the mounting portion is formed to bulge upward along a fold line crossing in the vehicle width direction in the middle of extending forward from the cross member,

a first rib protruding upward is formed on the raised portion forming the mounting portion,

a second bead recessed downward is formed on the opposite side of the mounting portion with the fold line therebetween so as to extend in the vehicle front-rear direction,

the first reinforcing rib and the second reinforcing rib extend so as not to intersect with each other.

21. The vehicle body front structure according to claim 3, wherein the cross member further includes a lid member arranged to close an upward opening of the hat-shaped cross section from above,

a lower end flange is formed at a lower end portion of the front wall of the longitudinal member facing forward,

the bracket is configured to sandwich the eave portion of the cross member between the bracket and the cover member to be coupled to each other in a three-piece overlapping manner, and sandwich the eave portion of the cross member between the bracket and the lower end flange to be coupled to each other in a three-piece overlapping manner.

22. The vehicle body front structure according to claim 3, wherein the cross member further includes a lid member arranged to close an upward opening of the hat-shaped cross section from above,

the bracket supports an intercooler, and the cover member supports a radiator.

23. The vehicle body front structure according to claim 3, wherein a lower end portion of the longitudinal member protrudes forward,

the cross member further includes a cover member disposed so as to close an upward opening of the hat-shaped cross section from above,

the cover member supports a lower portion of the heat sink,

an upper bracket extending forward is disposed on the upper cross member of the pair of cross members,

the upper bracket supports an upper portion of the heat sink.

24. The vehicle body front structure according to claim 22, wherein an upper portion of the intercooler is fixed to the vertical member via a support member, and a pipe extending from the intercooler is disposed so as to pass through a lower end portion of the vertical member on the vehicle width direction outer side and extend toward the front side frame side.

Technical Field

The present invention relates to a vehicle body front structure of a vehicle such as an automobile.

Background

For example, patent document 1 discloses a technique of protecting a lower tank of a radiator by a front lower shroud engaged with a lower surface of a cross member of a vehicle body front portion.

As a vehicle body front structure of an automobile, there is a structure including a pair of left and right front side frames extending in a vehicle front-rear direction, and a front bulkhead fixed to front end portions of the pair of left and right front side frames, respectively (see, for example, patent document 2).

Patent document 2 describes temporarily fixing the front side frame and the front bulkhead by using a dedicated jig. The jig disclosed in patent document 2 includes a positioning jig which is provided with jig support holes and is erected between left and right front side frames, and a partition jig which is provided with rods extending in the front-rear direction and is connected to a front partition. According to the clip disclosed in patent document 2, the front bulkhead can be temporarily fixed to the front side frame together with the bulkhead clip by inserting the connecting rod into the clip support hole from the front.

Patent documents 3 and 4 describe temporarily fixing two vehicle body members by using claws, although the purpose of temporarily fixing the front side frame and the dash panel is not achieved. That is, patent document 3 describes a structure in which one claw provided in a bracket is hooked from above to an edge portion of a hole provided in a roof reinforcement. Patent document 4 describes a structure in which a claw provided in a damper is hooked from above to an edge of an opening provided in a gusset.

Further, as a cooling equipment mounting structure for an automobile, there is known a structure having a radiator mounting bracket mounted to a joint portion between a cross member and a vertical member disposed at a front portion of a vehicle body (see, for example, patent document 5). Specifically, the cooling equipment mounting structure includes: a front cross member (cross member) extending in the vehicle width direction at a front portion of the vehicle body; and a connecting member (longitudinal member) connected to an outer end portion of the front cross member in the vehicle width direction, and connecting the front cross member to the front side frame by extending upward from the outer end portion and being connected to a front end portion of the front side frame (vehicle body frame).

The radiator mounting bracket supports a lower portion of a radiator (cooling equipment) by an extension portion extending forward from a base end portion mounted on an inner corner side formed by the front cross member and the connecting member.

The connecting member has a closed cross-sectional structure, and a reinforcing member formed of a plate body that is long in the vertical direction is disposed inside the connecting member. The reinforcing member is bent at a central portion extending in the vertical direction. The upper end portion of the reinforcement member is connected to the lower surface of the front side frame, the central portion is connected to the inner wall surface of the reinforcement member, and the lower end portion is connected to the upper surface of the front cross member.

Disclosure of Invention

However, in recent years, the automatic driving technique has been widely used for automobiles, and the necessity of disposing a front obstacle detection sensor for detecting an obstacle in front of the vehicle is increased as compared with the lower cross member of the front bulkhead.

In the temporary fixing structure disclosed in patent document 2, since an operation of attaching the jig to each member or an operation of attaching the jigs to each other is required, there is a problem that assembling workability is poor.

In the temporary fixing structure disclosed in patent document 3, one claw provided in the bracket is hooked from above to an edge portion of a hole provided in the roof reinforcement, and the claws are arranged at one side of the center of the bracket in the vehicle width direction. Therefore, the temporary fixing structure disclosed in patent document 3 requires a work to be performed while being pressed by a hand in order to prevent the bracket from falling, and has a problem of poor assembling workability.

In the temporary fixing structure disclosed in patent document 4, since the plate thickness direction of the claws provided in the damper coincides with the vertical direction and the claws support the load (self weight) in the plate thickness direction, there is a possibility that the claws deform.

Further, the reinforcing member of the conventional cooling equipment mounting structure (see, for example, patent document 5) is joined only to the upper surface of the front cross member (cross member). Therefore, in the conventional cooling equipment mounting structure, the joint strength of the corner portion formed by the front cross member and the connecting member (vertical member) is insufficient. Therefore, for example, when the automobile is driven on a road with poor road conditions, the corner portion may be twisted and deformed due to vertical displacement of the front end portion of the front side frame. Further, when the corner portion is twisted, the support stability of the radiator mounting bracket attached to the inner corner side of the front cross member and the connecting member is impaired.

A general object of the present invention is to provide a vehicle body front structure capable of improving the degree of freedom in designing a front obstacle detection sensor and its peripheral components.

The main object of the present invention is to provide a vehicle body front structure that can improve assembly workability during temporary fixing and can suppress the drop-off of a dash panel.

Another object of the present invention is to provide a vehicle body front structure having excellent joint strength between a cross member on which a bracket is disposed and a corner portion of a longitudinal member, high rigidity of the corner portion, and excellent support stability of a cooling equipment by preventing transmission of vertical vibration of the cooling equipment to a vehicle compartment side.

In order to achieve the above object, the present invention provides a ground contact guard attachment structure to be attached to a lower cross member of a front bulkhead, wherein the ground contact guard has an upper wall, a front wall, and a lower wall having a dimension in a vehicle longitudinal direction longer than that of the upper wall, the upper wall and the lower wall extend in parallel to each other, the front wall is substantially orthogonal to the upper wall and the lower wall, and connects a vehicle front end portion of the upper wall and a vehicle front end portion of the lower wall, the lower cross member has a hat-shaped cross-sectional shape that opens upward and has at least a front side flange portion and a bottom surface portion, the upper wall is fixed to the front side flange portion of the lower cross member, the lower wall is fixed to the bottom surface portion, and a front obstacle detection sensor is attached to the front wall.

Effects of the invention

In the present invention, a vehicle body front structure capable of improving the degree of freedom in designing the front obstacle detection sensor and its peripheral components can be obtained.

The present invention can provide a vehicle body front structure that can improve assembly workability during temporary fixation and can suppress dropping of a dash panel.

Further, the present invention can provide a vehicle body front structure that has excellent joint strength between the corner portions of the cross member and the vertical member on which the bracket is disposed, has high rigidity at the corner portions, blocks transmission of vertical vibration of the cooling equipment to the vehicle compartment side, and has excellent support stability of the cooling equipment.

Drawings

Fig. 1 is a perspective view showing a schematic configuration of a vehicle body front portion of a vehicle to which a vehicle body front portion structure according to embodiment 1 of the present invention is applied.

Fig. 2 is a partially enlarged perspective view showing a state in which the front obstacle detection sensor is attached via the ground contact guard shown in fig. 1.

In fig. 3, (a) is a perspective view of the ground contact guard as viewed obliquely from above, (b) is a perspective view of the ground contact guard as viewed obliquely from behind, and (c) is a perspective view of the ground contact guard as viewed from below in a state attached to the lower cross member.

Fig. 4 is a bottom view of the ground guard attached to the lower cross member as viewed from below.

Fig. 5 is a schematic cross-sectional view showing a bumper appearance and a lower hood disposed under a front portion of a vehicle body.

Fig. 6 is an explanatory diagram showing a state in which a bumper appearance or a lower guard disposed below a front portion of a vehicle body is in contact with a road surface and a jack-up load is input.

Fig. 7 is a schematic cross-sectional view showing a state in which a lid member covering a recess is attached in a state in which the front obstacle detection sensor is not arranged.

Fig. 8 is a perspective view showing a schematic configuration of a vehicle body front portion of a vehicle to which a vehicle body front portion structure according to embodiment 2 of the present invention is applied.

Fig. 9 is a partially cut-away perspective view showing the bumper beam extension and its periphery shown in fig. 8.

Fig. 10 is a cross-sectional view taken along line X-X of fig. 8.

Fig. 11 is a perspective view showing a left vertical member of the front bulkhead.

Fig. 12 is a perspective view showing a rear member of the vertical member.

In fig. 13, (a) is a perspective view showing the first hook piece, and (b) is a cross-sectional view taken along line XIIIb-XIIIb in (a).

In fig. 14, (a) is a perspective view showing the second hook piece, and (b) is a cross-sectional view taken along line XIVb-XIVb of (a).

Fig. 15 (a) is a perspective view for explaining an assembly process of the vehicle body front structure, and shows a state after temporarily fixing the vehicle body (body) and the dash panel. (b) Is a cross-sectional view schematically showing the position of the bolt hole of each member in the assembly step shown in (a).

Fig. 16 (a) is a perspective view for explaining an assembly process of the vehicle front structure, and shows a state in which the front bulkhead and the bumper beam assembly are temporarily fixed. (b) Is a cross-sectional view schematically showing the position of the bolt hole of each member in the assembly step shown in (a).

Fig. 17 (a) is a perspective view for explaining an assembly process of the vehicle body front portion structure, and shows a state in which the vehicle body, the dash panel, and the bumper beam assembly are temporarily fixed. (b) Is a cross-sectional view schematically showing the position of the bolt hole of each member in the assembly step shown in (a).

Fig. 18 (a) is a perspective view for explaining an assembly process of the vehicle front structure, and shows a state in which the dash panel and bumper beam assembly are lifted relative to the vehicle body. (b) Is a cross-sectional view schematically showing the position of the bolt hole of each member in the assembly step shown in (a).

Fig. 19 (a) is a perspective view for explaining an assembly process of the vehicle front portion structure, and shows a state in which the bumper beam assembly is lifted relative to the vehicle body and the dash panel. (b) Is a cross-sectional view schematically showing the position of the bolt hole of each member in the assembly step shown in (a).

Fig. 20 is a partial virtual structure perspective view showing a vehicle body front portion of a vehicle to which a vehicle body front portion structure according to embodiment 3 of the present invention is applied.

Fig. 21 is a partially enlarged perspective view of a portion XXI shown in fig. 20.

Fig. 22 is a partially enlarged perspective view showing a left half of the front bulkhead of fig. 20.

In fig. 23, (a) is a partially enlarged perspective view of a cross member including a longitudinal section along the vehicle front-rear direction, and (b) is a partially enlarged perspective view including a section of a joint portion of the cross member and the longitudinal member.

Fig. 24 is a perspective view showing a rear member constituting the vertical member.

Fig. 25 is an overall perspective view of a reinforcing member constituting the vertical member.

Fig. 26 shows a perspective view showing a state where the bracket is viewed from the upper left oblique rear side, (b) shows a perspective view showing a state where the bracket is viewed from the lower right oblique front side, and (c) is a sectional view taken along line XXVIC-XXVIC of (a).

Fig. 27 is a partially enlarged perspective view showing a coupling form of the bracket and the front bulkhead as seen from the direction XXVII in fig. 22.

Detailed Description

Next, embodiments of the present invention will be specifically described with reference to the drawings as appropriate.

In the drawings, "front-rear" indicates a vehicle front-rear direction, "left-right" indicates a vehicle width direction (left-right direction), and "up-down" indicates a vertical up-down direction.

A vehicle to which the vehicle body front portion structure according to embodiment 1 of the present invention is applied has a vehicle body constituted by a frameless vehicle body. The vehicle body is disposed in bilateral symmetry with respect to a center line, not shown, that passes through the center in the vehicle width direction of the vehicle and extends in the vehicle front-rear direction.

As shown in fig. 1, the vehicle body front portion 10 is configured to include a pair of left and right front side frames 12, a pair of left and right upper members 14, a pair of left and right coupling members 16, and a front bulkhead 18. A pair of ground contact guards 20, 20 are attached to the front bulkhead 18 substantially at the center of the lower end thereof. The pair of ground contact guards 20 and 20 are configured similarly.

As shown in fig. 1, the pair of left and right front side frames 12, 12 are disposed on the left and right sides in the vehicle width direction, respectively, and extend in the vehicle front-rear direction. The vehicle rear end portion of each front side frame 12 is connected to a cross member, not shown.

The pair of left and right upper members 14, 14 are disposed on the vehicle width direction outer sides of the pair of left and right front side frames 12, respectively, and extend in the vehicle front-rear direction. The vehicle rear end portion of each upper member 14 is coupled to a pair of left and right front pillars, not shown.

Each upper member 14 is composed of an upper member upper portion 14a and an upper member lower portion (front end portion on the vehicle front side) 14 b. The upper member upper portion 14a extends in a downward slope from a front pillar, not shown, toward the front of the vehicle. The upper member lower portion 14b extends in the up-down direction at a downward slope from the upper member upper portion 14a toward the vehicle lower side.

As shown in fig. 1, the front bulkhead 18 is disposed at a vehicle front end portion. The front bulkhead 18 is composed of a pair of left and right side members 24, an upper cross member 26, and a lower cross member 28. The pair of left and right vertical members 24, 24 are disposed substantially in parallel in the vertical direction in the vicinity of the front end portions of the pair of left and right front side frames 12, respectively.

The upper cross member 26 is erected between upper end portions of the pair of left and right longitudinal members 24, 24 along the vehicle width direction. Connecting members 27, 27 for connecting both ends in the vehicle width direction of each upper cross member 26 to (upper member upper portions 14a) of each upper member 14 are connected to both ends in the vehicle width direction of the upper cross member 26.

The lower cross member 28 has a hat-shaped cross-sectional shape that opens upward. As shown in fig. 2, the lower cross member 28 is composed of a front flange 29a, a front side wall 29b, a bottom surface 29c, a rear side wall 29d, and a rear flange 29 e.

The front flange portion 29a projects toward the vehicle front and extends in the vehicle width direction. The front side wall 29b is formed continuously with the front flange 29a and is bent downward. The bottom surface portion 29c connects the lower end of the front side wall 29b and the lower end of the rear side wall 29d, which face each other. The rear side wall 29d is disposed opposite the front side wall 29b, and is formed to rise upward from the vehicle rear end portion of the bottom surface portion 29 c. The rear flange portion 29e is formed so as to be bent toward the vehicle rear from an upper edge portion of the rear side wall 29 d.

The lower cross member 28 is erected between lower end portions of the pair of left and right longitudinal members 24, 24 in the vehicle width direction. The lower cross member 28 is located substantially below the upper cross member 26 in the vertical up-down direction.

As described later, the upper wall 20a of the ground contact guard 20 is fixed to the front flange portion 29a of the lower beam 28, and the lower wall 20c of the ground contact guard 20 is fixed to the bottom surface portion 29c of the lower beam 28 (see fig. 3 c).

As shown in fig. 1, each connecting member 16 is substantially rectangular in front view, and is disposed between the lower end portion of the upper member 14 (the upper member lower portion 14b) and each front side frame 12 along the vehicle width direction. Each of the connecting members 16 connects the pair of left and right upper members 14, 14 and the pair of left and right front side frames 12, 12 to each other in the vehicle width direction.

As shown in fig. 3 (a) and 3 (b), the ground contact guard 20 includes an upper wall 20a, a front wall 20b, and a lower wall 20 c. The upper wall 20a and the lower wall 20c extend in parallel and face to each other. The front wall 20b is substantially orthogonal to the upper wall 20a and the lower wall 20c, and connects a vehicle front end portion of the upper wall 20a and a vehicle front end portion of the lower wall 20c, respectively. In embodiment 1, the upper wall 20a, the front wall 20b, and the lower wall 20c are integrally formed by, for example, bending, but the present invention is not limited thereto, and may be separately manufactured and integrally joined. The ground guard 20 is not limited to the shape shown in fig. 3 (a) and 3 (b), and the front wall 20b may be curved in an arc shape toward the vehicle front side to have a U-shaped cross section, for example.

The front wall 20b is substantially rectangular in front view (see fig. 3 (a)), and is formed in a substantially hat shape in cross section along the vehicle width direction in the mounted state. The front wall 20b is provided so as to face the vehicle front (see fig. 1), and connects vehicle front end portions of the upper wall 20a and the lower wall 20c to each other. A mounting hole 30 is formed in a substantially central portion of the front wall 20b to pass through the front and rear surfaces of the front wall 20 b.

A mounting nut 32 is coupled (joined) to the vehicle rear surface (rear surface) of the front wall 20b near the mounting hole 30 (see fig. 3 b). The screw portion of the bolt 33 (see fig. 2) inserted into the mounting hole 30 of the front wall 20b is fastened to the mounting nut 32, whereby a front obstacle detection sensor 34 described later is mounted on the ground contact guard 20.

The upper wall 20a has a substantially triangular shape in plan view. The upper wall 20a in the mounted state has a substantially hat-shaped cross section, in which the central portion bulges upward relative to the corner portions on both sides.

The lower wall 20c is rectangular in shape elongated toward the vehicle rear in plan view. The vehicle longitudinal direction dimension of the lower wall 20c is longer than the vehicle longitudinal direction dimension of the upper wall 20 a. The upper wall 20a and the lower wall 20c extend in the up-down direction opposite to each other and substantially in parallel. The upper wall 20a and the lower wall 20c extend from the front wall 20b toward the vehicle rear side at a predetermined interval in the vertical direction.

As shown in fig. 3 (a) and 3 (b), a linear stepped portion 36 having a step between the inner side and the outer side is continuously formed from the vehicle front end portion to the middle portion of the side portion of the front wall 20b on both sides in the vehicle width direction and the lower wall 20c on both sides in the vehicle width direction. Stepped flange portions 38 are continuously formed by the stepped portion 36 on both sides of the front wall 20b in the vehicle width direction and on both sides of the front side of the lower wall 20 c. The level difference flange 38 is formed continuously at least on the front wall 20b and the lower wall 20c, but the level difference portion 36, not shown, may be formed on the upper wall 20a and the level difference flange 38 may be formed continuously on the upper wall 20a, the front wall 20b, and the lower wall 20 c.

A circular access hole 40 that vertically penetrates the lower wall 20c is formed in the vehicle front side of the lower wall 20 c. The access hole 40 is used to allow a gun tip portion of a welding gun (not shown) to be inserted (to be accessible) from the lower wall 20c side so as to form a body joint portion 42 (see fig. 4) on the upper wall 20a side.

Ground guard 20 includes a vehicle body joining portion 42. The vehicle body joining portion 42 fixes the front obstacle detection sensor 34 to the vehicle width direction center portion of the vehicle body front portion 10. As shown in fig. 4, the vehicle body joining portion 42 is composed of an upper wall side vehicle body joining portion 42a and a lower wall side vehicle body joining portion 42 b. The upper-wall-side vehicle body engagement portion 42a fixes (engages) the vehicle-rear-side upper surface of the upper wall 20a with respect to the front-side flange portion 29a of the lower cross member 28. The lower wall-side vehicle body engaging portion 42b fixes (engages) the vehicle rear-side upper surface of the lower wall 20c with respect to the bottom surface portion 29c of the lower cross member 28.

As shown in fig. 3 (a) and 3 (b), a drain portion 44 for discharging the electrodeposition coating liquid is formed on the joint surface between the lower beam 28 and the ground contact guard 20. The discharge portion 44 is constituted by an upper wall side discharge portion 44a formed in the upper wall 20a of the earth guard 20 and a lower wall side discharge portion 44b formed in the lower wall 20 c.

The upper wall side drain portion 44a is formed by a step portion formed between the central portion of the upper wall 20a and the corner portions on both sides with the central portion as the center. The lower wall side discharge portion 44b is formed by a linear elongated groove recessed downward from the upper surface of the lower wall 20 c. The long groove extends continuously in a straight line from a middle portion of the lower wall 20c in the vehicle front direction to a vehicle rear end portion.

As shown in fig. 2, the front obstacle detection sensor 34 has a housing 50 formed of a rectangular case. The outer shell 50 is located above the lower cross member 28 in the vertical direction, and is disposed at the center portion of the lower cross member 28 in the vehicle width direction. The upper portion of the front obstacle detection sensor 34 is fixed to the pair of left and right vertical members 24, 24 via a1 st stay 46 extending in the vehicle width direction, respectively. Further, the lower portion of the front obstacle detection sensor 34 is fixed to the floor contact guard 20 via the 2 nd support member 48 extending in the vehicle front-rear direction. In this case, the ground contact guard 20 also functions as a bracket for attaching the front obstacle detection sensor 34 to the lower beam 28.

As shown in fig. 5, a guide member 52 is disposed in the vehicle front side of the front bulkhead 18. The guide member 52 is formed with a recessed portion 56 into which the 2 nd brace 48 extending in the vehicle front-rear direction is fitted, by recessing the guide surface 54.

As shown in fig. 5, a bumper appearance 62 on the vehicle front side and a lower guard 64 on the vehicle rear side are disposed below the vehicle front portion 10. Further, a cooling pipe 66 is disposed between the ground contact guard 20 and the front obstacle detection sensor 34 along the vertical direction. The cooling pipe 66 functions as a peripheral component of the front obstacle detection sensor 34.

As shown in fig. 1, a pair of left and right damper housings 58 that house dampers, not shown, are provided above the vehicle rear end portions of the front side frames 12. A pair of left and right damper bases 60, 60 for supporting a damper, not shown, are provided on an upper portion of each damper housing 58.

The damper housing 58 is disposed between each upper member 14 and each front side frame 12 along the vehicle width direction. The damper housing 58 is fixed to the inner side wall of the upper member 14 and the outer side wall of the front side frame 12 via a plurality of side flange portions, not shown.

The vehicle body front portion 10 to which the ground contact guard attachment structure, which is the vehicle body front portion structure of embodiment 1, is applied is basically configured as described above, and the operational effects thereof will be described next.

In embodiment 1, the ground contact protector 20 is formed of the upper wall 20a and the lower wall 20c facing each other in parallel, and the front wall 20b substantially orthogonal to the upper wall 20a and the lower wall 20c and connecting the upper wall 20a and the lower wall 20c (see fig. 3a and 3 b), whereby the rigidity and strength of the ground contact protector 20 can be improved. The ground contact guard 20 may have a U-shaped cross section. Thus, in embodiment 1, even if the front obstacle detection sensor 34 vibrates vertically, the ground contact guard 20 functioning as a bracket has high rigidity and strength, and therefore, transmission of vertical vibration to the lower cross member 28 is suppressed. As a result, in embodiment 1, the silencing performance in the vehicle interior can be improved.

For example, the bumper face 62 or the lower guard 64 disposed below the front portion 10 of the vehicle body may be deformed upward by a jack-up load input by contact with a road surface 68 (see fig. 6). In this case, in embodiment 1, as shown in fig. 6, upward displacement of the lower guard 64 and the bumper appearance 62 is restricted by the ground contact protector 20 having high rigidity and strength. Therefore, the deformed bumper appearance 62 and/or the lower guard 64 can be prevented from interfering with the components (e.g., the cooling pipe 66, the front obstacle detection sensor 34, etc.) disposed above the ground contact guard 20. As a result, in embodiment 1, the degree of freedom in designing the front obstacle detection sensor 34 and its peripheral components can be improved.

In embodiment 1, the ground contact guard 20 includes a step flange portion 38 formed with at least a step portion 36 continuous from the front wall 20b to the lower wall 20c (see fig. 3a and 3 b). Thus, in embodiment 1, the step flange 38 can further improve rigidity and strength.

In embodiment 1, an upper-wall-side drain portion 44a and a lower-wall-side drain portion 44b for discharging the electrodeposition coating liquid are formed on the joint surface between the upper wall 20a and the front-side flange portion 29a of the earth guard 20 and the joint surface between the lower wall 20c and the bottom surface portion 29c of the earth guard 20, respectively (see fig. 3 (a) and 3 (b)). Since the electrodeposition coating liquid can be smoothly discharged from the joint surface to the outside through the upper wall side drain portion 44a and the lower wall side drain portion 44b, the occurrence of rust can be suppressed and a rust prevention effect can be obtained.

In embodiment 1, the ground contact guard 20 includes a vehicle body joining portion 42 such that the front obstacle detection sensor 34 is positioned at the center in the vehicle width direction. The vehicle body joining portion 42 is constituted by an upper wall side vehicle body joining portion 42a and a lower wall side vehicle body joining portion 42b (see fig. 4). In embodiment 1, the vehicle body joining portion 42 suppresses vertical vibration of the front obstacle detection sensor 34, thereby preventing a decrease in detection accuracy.

In embodiment 1, an access hole 40 for a welding gun for forming a vehicle body joint portion 42 with respect to the upper wall 20a is formed in the lower wall 20c of the ground contact guard 20 (see fig. 3a and 3 b). Thus, in embodiment 1, the welding operation can be easily performed from below with the ground contact guard 20 assembled to the lower cross member 28, and the ground contact guard 20 can be easily fixed (joined) to the lower cross member 28.

In embodiment 1, the front obstacle detection sensor 34 is disposed at the center in the vehicle width direction, the upper portion of the front obstacle detection sensor 34 is fixed to the pair of left and right vertical members 24, 24 via the 1 st stay 46, and the lower portion of the front obstacle detection sensor 34 is fixed to the ground contact guard 20 via the 2 nd stay 48. Thus, in embodiment 1, by adjusting the mounting position (for example, the vertical position) of the front obstacle detection sensor 34 mounted on the front bulkhead 18, the front obstacle detection sensor 34 can be disposed at a position free from obstacles with respect to the inflow of air into the radiator RA (see fig. 5). Further, this can suppress the vertical vibration of the front obstacle detection sensor 34, thereby suppressing the decrease in detection accuracy.

In embodiment 1, the guide member 52 is disposed at the vehicle front side position of the dash panel 18, and the guide surface 54 of the guide member 52 is recessed downward to form a recessed portion 56 into which the 2 nd brace 48 that supports the front obstacle detection sensor 34 is fitted (see fig. 5). Thus, in embodiment 1, the front obstacle detection sensor 34 can be disposed in front of the radiator RA without interfering with the flow of the air flow that cools the radiator RA. As a result, in embodiment 1, the degree of freedom in designing the front obstacle detection sensor 34 and its peripheral components can be further improved.

For example, in the case where the front obstacle detection sensor is not disposed so that the front obstacle detection sensor 34 is not mounted, as shown in fig. 7, a cover member 70 that covers the recessed portion 56 and on which the guide surface 54 is formed can be disposed. The cover member 70 includes a front wall 70b extending from the intermediate bent portion 70a toward the vehicle front, a rear wall 70c extending from the bent portion 70a toward the vehicle rear, and a rear side wall 70d descending from a rear end of the rear wall 70c toward the lower guide member 52. Thus, in embodiment 1, the concave portion 56 is covered with the lid member 70, and is difficult to visually recognize, the appearance of the vehicle body front portion 10 is improved, and the flow of the air flow along the guide surface 54 can be further smoothly improved.

Next, a vehicle to which the vehicle body front portion structure according to embodiment 2 of the present invention is applied will be described in detail below.

As shown in fig. 8, a vehicle body front portion 101 of this vehicle includes a pair of left and right front side frames 102, a pair of left and right subframe support portions 103, a pair of left and right front and rear frames 104, a bumper beam assembly 105, and a front bulkhead 106.

The front side frame 102 is a metal structural member extending in the vehicle front-rear direction. The front side frame 102 is formed in a hollow structure having a closed cross section. The front end portions of the pair of left and right front side frames 102, 102 are fixed with connection plates 107, respectively. As shown in fig. 9, the connecting plate 107 is a metal plate-like member that connects the front side frame 102, the bumper beam assembly 105, and the front bulkhead 106 to each other, and extends in the vertical direction and the vehicle width direction. A bent flange portion 107a bent rearward is formed at the upper edge of the connecting plate 107.

As shown in fig. 8, the subframe support portion 103 is a metal member extending downward from the front portion of the front side frame 102. The front end portion of the subframe support portion 103 is attached to the lower portion of the front bulkhead 106 by a bolt.

The front and rear frames 104 are frames that constitute a part of the front subframe, and are metal structural members that extend in the vehicle front-rear direction. The front and rear frames 104 are disposed below the front frame 102. The front end portions of the front and rear frames 104 are fixed to the lower end portions of the subframe support portions 103 by bolts.

The bumper beam assembly 105 is a metal member extending in the vehicle width direction and bridging between the front end portions of the pair of left and right front side frames 102, 102. The bumper beam assembly 105 includes a pair of left and right bumper beam extension portions 105A, a pair of left and right mounting plates 105B, and a bumper beam 105C.

The bumper beam extension 105A is a member attached to the front end of the front side frame 102 via an attachment plate 105B. The bumper beam extension 105A has a hollow structure of a rectangular prism shape with front and rear openings, and is configured to be weaker than the bumper beam 105C and the front side frame 102 depending on selection of material, thickness, and the like. At the time of a frontal collision of the vehicle, the bumper beam extension 105A absorbs the impact by being crushed in the vehicle front-rear direction by the frontal collision load.

As shown in fig. 9, the mounting plate 105B is a plate-like member fixed to the rear end portion of the bumper beam extension 105A. The mounting plate 105B extends in the vertical direction and the vehicle width direction. The mounting plate 105B has an opening 105Ba and a pair of upper and lower fitting ribs 105Bb, 105 Bb.

As shown in fig. 10, the opening 105Ba faces the interior opening of the bumper beam extension 105A. The opening dimension La in the height direction of the opening 105Ba is formed smaller than the opening dimension Lb in the height direction of the bumper beam extension 105A (La < Lb). An upper edge 105Bc of the opening 105Ba protrudes downward from the upper wall 105Aa of the bumper beam extension 105A, and is positioned to overlap the inside of the bumper beam extension 105A in the vehicle front-rear direction. The lower edge 105Bd of the opening 105Ba protrudes upward from the lower wall 105Ab of the bumper beam extension 105A, and is located at a position overlapping the inside of the bumper beam extension 105A in the vehicle front-rear direction.

The pair of upper and lower fitting ribs 105Bb are portions that protrude forward above and below the opening 105Ba and into which the rear end portion of the bumper beam extension 105A is fitted. The fitting ribs 105Bb, 105Bb each have a plate shape and extend in the vehicle front-rear direction and the vehicle width direction. The upper fitting rib 105Bb is spaced upward from the opening 105Ba, and abuts against the outer surface of the upper wall 105Aa of the bumper beam extension 105A. The upper fitting rib 105Bb and the upper edge 105Bc of the opening 105Ba have L-shaped cross sections. The lower fitting rib 105Bb is spaced downward from the opening 105Ba, and abuts against the outer surface of the lower wall 105Ab of the bumper beam extension 105A. The lower fitting rib 105Bb and the lower edge 105Bd of the opening 105Ba have L-shaped cross sections.

As shown in fig. 8, the bumper beam 105C is a member that is stretched between the front end portions of the pair of left and right bumper beam extensions 105A, 105A at the same height as the front end portions of the pair of left and right front side frames 102, 102.

The front bulkhead 106 is a metal structural member that is fixed to the front end portions of the front side frames 102, 102 and the subframe support portions 103, 103 and supports the radiator. The front bulkhead 106 has a rectangular frame shape in front view. A power unit chamber in which an engine and the like are disposed is formed between the left and right front side frames 102, 102 and behind the dash panel 106. The front bulkhead 106 has a pair of upper and lower cross members 106A, 106A and a pair of left and right longitudinal members 106B, 106B.

The cross member 106A is a metal structural member extending in the vehicle width direction. The cross member 106A is formed in a hollow structure or a groove shape having a closed cross section by combining a plurality of steel plates, for example. The upper cross member 106A is disposed between the upper ends of the pair of left and right vertical members 106B, 106B. The lower cross member 106A is erected between the lower end portions of the pair of left and right vertical members 106B, 106B.

The vertical member 106B is a metal structural member that extends in the vertical direction on the inside in the vehicle width direction of the bumper beam extension 105A. The vertical member 106B is formed into a hollow structure having a closed cross section by combining a plurality of steel plates, for example. As shown in fig. 11 and 12, the vertical member 610B includes the front member 110 and the rear member 120. The front member 110 corresponds to the "second L-shaped cross-sectional member" of the invention. The rear member 120 corresponds to the "first L-shaped cross-sectional member" of the invention.

As shown in fig. 11, the front member 110 is a metal member constituting the front wall portion and the outer wall portion of the vertical member 106B. The front side member 110 is divided into two parts, a front side upper member 110A and a front side lower member 110B.

The front upper member 110A has a substantially L-shape in plan view. The front upper member 110A integrally includes a first front wall portion 111, a first outer wall portion 112, and first flange portions 113 and 114.

The first front wall portion 111 is a portion constituting an upper side of the front wall portion of the vertical member 106B, and extends in the vertical direction and the vehicle width direction. The first outer wall portion 112 is a portion constituting an upper side of the outer wall portion of the longitudinal member 106B, and extends in the vertical direction and the vehicle front-rear direction. The first outer wall portion 112 extends rearward from the vehicle width direction outer end portion of the first front wall portion 111.

The first flange portion 113 extends forward from the vehicle width direction inner end portion of the first front wall portion 111, and extends in the vertical direction and the vehicle front-rear direction. The first flange portion 113 is fixed to a first inner wall portion 122 of a rear member 120, which will be described later, by welding or the like. The first flange portion 114 extends outward in the vehicle width direction from the rear end portion of the first outer wall portion 112, and extends in the vertical direction and the vehicle width direction. The first flange portion 114 is fixed to a first rear wall portion 121 of a rear member 120, which will be described later, by welding or the like.

The front lower member 110B has a substantially L-shape in plan view. The front lower member 110B integrally includes a second front wall portion 115, a second outer wall portion 116, and second flange portions 117 and 118.

The second front wall portion 115 is a portion constituting the lower portion side of the front wall portion of the vertical member 106B, and extends in the up-down direction and the vehicle width direction. The second outer wall portion 116 is a portion constituting a lower portion side of the outer wall portion of the longitudinal member 106B, and extends in the vertical direction and the vehicle front-rear direction. The second outer wall portion 116 extends rearward from the vehicle width direction outer end portion of the second front wall portion 115.

The second flange portion 117 extends forward from the vehicle width direction inner end portion of the second front wall portion 115, and extends in the vertical direction and the vehicle front-rear direction. The second flange portion 117 is fixed to a second inner wall portion 124 of the rear member 120, which will be described later, by welding or the like. The second flange portion 118 extends outward in the vehicle width direction from a rear end portion of the second outer wall portion 116, and extends in the vertical direction and the vehicle width direction. The second flange portion 118 is fixed to a second rear wall portion 123 of a rear member 120, which will be described later, by welding, bolts, or the like.

As shown in fig. 12, the rear member 120 is a metal member constituting the rear wall portion and the inner wall portion of the vertical member 106B. The rear side member 120 is divided into two parts, a rear side upper member 120A and a rear side lower member 120B. The rear upper member 120A is L-shaped in plan view. The rear upper member 120A integrally includes a first rear wall portion 121 and a first inner wall portion 122.

The first rear wall portion 121 is a portion constituting an upper side of the rear wall portion of the vertical member 106B, and extends in the vertical direction and the vehicle width direction. The first inner wall portion 122 is a portion constituting an upper side of the inner wall portion of the vertical member 106B, and extends in the vertical direction and the vehicle front-rear direction. The first inner wall portion 122 extends forward from the vehicle width direction inner end portion of the first rear wall portion 121.

The rear lower member 120B is L-shaped in plan view. The rear lower member 120B integrally includes a second rear wall portion 123 and a second inner wall portion 124.

The second rear wall portion 123 is a portion constituting a lower portion side of the rear wall portion of the vertical member 106B, and extends in the vertical direction and the vehicle width direction. The lower portion of the second rear wall portion 123 shown in fig. 11 overlaps the second flange portion 118 of the front side lower member 110B and the front end portion of the subframe support portion 103, and is coupled to each other by a bolt B from the front. In this way, the lower fixing portion 140 to which the rear lower member 120B, the front lower member 110B, and the subframe support portion 103 are fixed is formed. The second inner wall portion 124 shown in fig. 12 is a portion constituting the lower portion side of the inner wall portion of the vertical member 106B, and extends in the vertical direction and the vehicle front-rear direction. The second inner wall portion 124 extends forward from the vehicle width direction inner end portion of the second rear wall portion 123.

As shown in fig. 11, the second rear wall portion 123 has a mounting extension wall 125, a first hook piece 126, and a second hook piece 127.

The mounting extension wall 125 is a portion of the second rear wall portion 123 that extends outward in the vehicle width direction than the vehicle width direction outer end portion of the front side member 110. That is, the mounting extension wall 125 is formed such that the second rear wall portion 123 of the rear side member 120 extends outward in the vehicle width direction than the vehicle width direction outer end portion of the front side member 110. A portion of the side member 106B other than the attachment extension wall 125 (hereinafter referred to as "side member main body 130") is formed into a rectangular hollow cross section extending in the vertical direction.

The first hooking piece 126 is a plate-shaped portion bent rearward from the vehicle width direction outer end portion of the attachment extension wall 125, and is hooked and engaged from above with respect to the bent flange portion 107a of the connecting plate 107 at the time of temporary fixing described later. The first hook piece 126 has a hook shape with a tip end extending downward in a side view. As shown in fig. 13 (a) and 13 (b), the first hooking piece 126 includes a first curved portion 126a, a first vertical surface 126b, and a first inclined surface 126 c.

The first curvature 126a is formed at the boundary between the first hook piece 126 and the mounting extension wall 125 and bent rearward.

The first vertical surface 126b is a vertical surface extending rearward from the lower side of the first curvature portion 126a and extending in the vertical direction and the vehicle longitudinal direction.

The first inclined surface 126c is a surface extending rearward from the upper side of the first curvature portion 126a and inclined with respect to the vertical direction. The first inclined surface 126c is continuous with an upper end portion of the first vertical surface 126 b. The first inclined surface 126c may be inclined outward in the vehicle width direction with respect to the first vertical surface 126b as in embodiment 2, or may be inclined inward in the vehicle width direction. The first hook piece 126 includes a first vertical surface 126b and a first inclined surface 126c on its surface in the plate width direction. The plate width direction of the first hook piece 126 coincides with the up-down direction. Thus, the first hooking piece 126 supports the load (self-weight) on the surface in the plate width direction including the first vertical surface 126b and the first inclined surface 126 c.

As shown in fig. 11, the second hooking piece 127 is a plate-like portion bent forward from the vehicle-widthwise outer end portion of the attachment extension wall 125, and is hooked and engaged from below with respect to an upper edge 105Bc (see fig. 10) of the opening 105Ba of the attachment plate 105B at the time of temporary fixation. The second hook piece 127 has a hook shape with its front end side extending upward in a side view. The second hook piece 127 is separated downward from the first hook piece 126. As shown in fig. 14 (a) and 14 (b), the second hooking piece 127 includes a second curved portion 127a, a second vertical surface 127b, and a second inclined surface 127 c.

The second curvature 127a is formed at the boundary between the first hooking piece 126 and the mounting extension wall 125 and is bent forward.

The second vertical surface 127b is a vertical surface extending forward from the upper side of the second curvature portion 127a and extending in the vertical direction and the vehicle longitudinal direction.

The second inclined surface 127c is a surface extending forward from a lower side of the second curved portion 127a and inclined with respect to the vertical direction. The second inclined surface 127c is continuous with a lower end portion of the second vertical surface 127 b. The second inclined surface 127c may be inclined outward in the vehicle width direction with respect to the second vertical surface 127b as in embodiment 2, or may be inclined inward in the vehicle width direction. The second hook piece 127 includes a second vertical surface 127b and a second inclined surface 127c on its surface in the plate width direction. The plate width direction of the second hook piece 127 coincides with the vertical direction. Thus, the second hooking piece 127 supports the load with a plate-width-direction surface including the second vertical surface 127b and the second inclined surface 127 c.

As shown in fig. 9, the upper portion of the mounting extension wall 125 overlaps the mounting plate 105B and the coupling plate 107, and is coupled to each other by a bolt B from the front. Thus, the upper coupling portion 150 is formed, which couples the mounting extension wall 125, the mounting plate 105B, and the coupling plate 107. The lower portion of the mounting extension wall 125 overlaps the mounting plate 105B and the coupling plate 107, and is coupled to each other by a bolt B from the front. Thus, the lower coupling portion 160 is formed, which couples the mounting extension wall 125, the mounting plate 105B, and the coupling plate 107.

The upper coupling portion 150 is formed between the first and second hooking pieces 126 and 127. The upper coupling portion 150 is disposed above the upper fitting rib 105 Bb. The lower coupling portion 160 is formed between the second hooking piece 127 and the lower fixing portion 140. The lower coupling portion 160 is disposed below the lower fitting rib 105 Bb.

As shown in fig. 11, a recess 119 is formed in the front member 110. The recess 119 is a portion formed by recessing a part of the first outer wall 112, the second outer wall 116, the first front wall 111, and the second front wall 115 of the front member 110 inward in the vehicle width direction. The recess 119 is formed over a predetermined area in the vertical direction from a position below the first hook piece 126 to a position above the lower fixing portion 140. The recess 119 is formed at a position substantially corresponding to the mounting extension wall 125 in the vehicle width direction. The second hooking piece 127, the upper joining portion 150, and the lower joining portion 160 are formed at positions corresponding to the recessed portion 119 in the vehicle width direction, and are formed outside the recessed portion 119 in the vehicle width direction. The width Wa in the left-right direction of the front wall at the position corresponding to the upper coupling portion 150 in the front member 110 is formed smaller than the width Wb in the left-right direction of the front wall at the position corresponding to the first hooking piece 126 in the front member 110 (Wa < Wb).

As shown in fig. 11 and 12, the vehicle body front portion 101 includes a coupling member 170 and a reinforcing member 180 as accessory parts of the vertical member 106B.

As shown in fig. 11, the coupling member 170 is a metal plate-like member that couples the front lower member 110B and the lower cross member 106A. The connecting member 170 integrally includes a connecting front wall portion 171, a connecting outer wall portion 172, and connecting flange portions 173 to 176.

The connecting front wall portion 171 is a portion extending from the lower end portion of the second front wall portion 115 toward the cross member 106A, and extends in the oblique vertical direction and the vehicle width direction. The connecting outer wall portion 172 is a portion provided to extend from the lower end portion of the second outer wall portion 116 to the cross member 106A, and extends in the vertical direction and the vehicle front-rear direction. The connecting outer wall portion 172 extends rearward and downward from the vehicle width direction outer end portion of the connecting front wall portion 171.

The connecting flange 173 extends forward from the vehicle width direction inner end of the connecting front wall 171, and extends in the vertical direction and the vehicle longitudinal direction. The connecting flange portion 173 is fixed to the second inner wall portion 124 of the rear member 120 by welding or the like. The connecting flange portion 174 extends forward from the front end portion of the connecting front wall portion 171, and extends in the vehicle front-rear direction and the vehicle width direction. The coupling flange portion 174 is fixed to an appropriate position of the cross member 106A by welding or the like. The connecting flange portion 175 extends outward in the vehicle width direction from the rear end portion of the connecting outer wall portion 172, and extends in the vertical direction and the vehicle width direction. The connecting flange portion 175 is fixed to the second rear wall portion 123 of the rear member 120 by welding or the like. The connecting flange portion 176 extends outward in the vehicle width direction from the lower end portion of the connecting outer wall portion 172, and extends in the vehicle front-rear direction and the vehicle width direction. The connecting flange 176 is disposed inside the cross member 106A.

As shown in fig. 12, the reinforcing member 180 is a metal plate-like member that reinforces a connecting portion between the lower end portion of the vertical member 106B and the vehicle width direction outer side end portion of the horizontal member 106A. The reinforcing member 180 is disposed inside the cross member 106A. The reinforcing member 180 integrally includes a first plate portion 181, a second plate portion 182, a front flange portion 183, and a rear flange portion 184.

The first plate portion 181 is a portion fixed to the bottom surface of the cross member 106A by welding or the like, and extends in the vehicle front-rear direction and the vehicle width direction. The first plate portion 181 shown in fig. 11 is sandwiched between the coupling flange portion 176 and the bottom surface of the cross member 106A. The first plate portion 181 is fixed to the connecting flange portion 176 and the cross member 106A by welding or the like.

The second plate portion 182 extends upward from the vehicle width direction inner end portion of the first plate portion 181, and extends in the vertical direction and the vehicle front-rear direction. The second plate portion 182 abuts against the second inner wall portion 124 of the rear member 120.

The front flange 183 extends upward from the front end of the first plate 181. Front flange portion 183 is fixed to an appropriate position of cross member 106A by welding or the like.

The rear flange 184 extends upward from the rear end of the first plate 181. Rear flange 184 is fixed to an appropriate position of cross member 106A by welding or the like.

The vehicle body front portion 101 to which the vehicle body front portion structure of embodiment 2 is applied is basically configured as described above. Next, the assembly steps will be described with reference to fig. 15 to 20.

First, the vehicle body 108, the front bulkhead 106, and the bumper beam assembly 105 are individually manufactured by welding or the like. The "body" referred to herein includes a front side frame 102, a connecting plate 107, a subframe support portion 103, a front and rear frame 104, and the like.

Next, as shown in fig. 15 (a), the vehicle body 108 and the dash panel 106 are temporarily fixed. Specifically, the first hook piece 126 of the front bulkhead 106 is hooked to and engaged with the bent flange portion 107a of the connecting plate 107 from above. At this time, the first vertical surface 126b of the first hooking piece 126 abuts against and engages with the bent flange portion 107 a. Further, the front bulkhead 106 and the subframe support portion 103 are coupled (temporarily fixed) to each other by a bolt B from the front at the lower fixing portion 140. This allows vehicle body 108 and front bulkhead 106 to be temporarily fixed. In this temporarily fixed state, as shown in fig. 15 (b), bolt holes 108a and 108b of vehicle body 108 and bolt holes 106c and 106d of front bulkhead 106 are shifted from each other in the vertical direction. On the other hand, the bolt hole 106e of the front bulkhead 106 is formed in a vertically larger elongated hole shape than the bolt hole 103a of the subframe support portion 103, and therefore, even if the front bulkhead 106 is moved by a predetermined amount in the vertical direction, the bolt hole 106e of the front bulkhead 106 and the bolt hole 103a of the subframe support portion 103 are in a state of communication.

Although not shown, in this temporarily fixed state, electrodeposition coating is simultaneously performed on the vehicle body 108 and the front bulkhead 106. After the electrodeposition coating, the temporarily fixed state is released by detaching the front bulkhead 106 from the vehicle body 108. Thereafter, the engine is assembled to front and rear frames 104 of a vehicle body 108, and the radiator is assembled to a dash panel 106.

Next, as shown in fig. 16 (a), the front bulkhead 106 and the bumper beam assembly 105 are temporarily fixed. Specifically, the second hook piece 127 of the front partition 106 is hooked to and engaged with the upper edge 105Bc of the opening 105Ba of the attachment plate 105B from below. At this time, the second vertical surface 127b of the second hook piece 127 abuts against and engages with the upper edge 105Bc of the opening 105Ba, and the front end of the second hook piece 127 abuts against and engages with the inner surface of the upper wall 105Aa of the bumper beam extension 105A. This allows the front bulkhead 106 and the bumper beam assembly 105 to be temporarily fixed. In this temporarily fixed state, as shown in fig. 16 (b), the bolt holes 106c, 106d of the front bulkhead 106 and the bolt holes 105d, 105e of the bumper beam assembly 105 are shifted from each other in the vertical direction.

Next, as shown in fig. 17 (a), when the temporary fixation of the front bulkhead 106 and the bumper beam assembly 105 is maintained, the first hook piece 126 of the front bulkhead 106 is hooked to the bent flange portion 107a of the connecting plate 107 from above and engaged therewith. Thereby, the three of the vehicle body 108, the front bulkhead 106, and the bumper beam assembly 105 can be temporarily fixed. In this temporarily fixed state, as shown in fig. 17 (b), the bolt holes 108a, 108b of the vehicle body 108, the bolt holes 106c, 106d of the front bulkhead 106, and the bolt holes 105d, 105e of the bumper beam assembly 105 are displaced from each other in the vertical direction. In this temporarily fixed state, the bolt hole 106e of the front bulkhead 106 is in communication with the bolt hole 103a of the subframe support portion 103.

Next, as shown in fig. 18 (a) and 18 (b), the front bulkhead 106 and the bumper beam assembly 105 are lifted relative to the vehicle body 108 so that the positions of the bolt holes 108a, 108b of the vehicle body 108 and the positions of the bolt holes 106c, 106d of the front bulkhead 106 are aligned, respectively. At this time, the first hooking piece 126 is separated upward from the bent flange portion 107a, and the engagement of the first hooking piece 126 with the bent flange portion 107a is released. Subsequently, bolts B are inserted through the bolt holes 106e of the front bulkhead 106 and the bolt holes 103a of the subframe support portion 103 from the front, so that the front bulkhead 106 and the subframe support portion 103 are coupled (permanently fixed) to each other by the bolts B. In this lifted state, the bolt holes 105d and 105e of the bumper beam assembly 105 are vertically offset with respect to the bolt holes 108a and 108b of the vehicle body 108 and the bolt holes 106c and 106d of the front bulkhead 106.

Next, as shown in fig. 19 (a) and 19 (b), the bumper beam assembly 105 is lifted relative to the vehicle body 108 and the front bulkhead 106 so that the bolt holes 105d, 105e of the bumper beam assembly 105 are aligned with the bolt holes 108a, 108b of the vehicle body 108 and the bolt holes 106c, 106d of the front bulkhead 106, respectively. At this time, the second hook piece 127 is separated downward from the upper edge 105Bc of the opening 105Ba and the upper wall 105Aa of the bumper beam extension 105A, and the engagement of the second hook piece 127 with the upper edge 105Bc or the upper wall 105Aa is released. Next, bolts B are inserted through the front bolt holes 105d, 106c, and 108a, and bolts B are inserted through the front bolt holes 105e, 106d, and 108B, so that the front bulkhead 106 and the bumper beam assembly 105 are coupled (permanently fixed) to the vehicle body 108 by the bolts B. According to this manufacturing step, after the provisional fastening work between the three members is continuously performed, the bolt fastening work between the three members can be continuously performed, so that the assembling workability is improved.

Further, the vehicle body 108 and the front bulkhead 106 may be temporarily fixed, the front bulkhead 106 may be lifted up with respect to the vehicle body 108, the front bulkhead 106 and the subframe support portion 103 may be coupled (permanently fixed) to each other by the bolt B, and then the front bulkhead 106 and the bumper beam assembly 105 may be temporarily fixed. That is, the assembly steps shown in fig. 16 (a), 16 (b) to 18 (a), and 18 (b) may be changed.

As shown in fig. 8, a vehicle body front portion 101 according to embodiment 2 includes a pair of left and right front side frames 102, 102 extending in the vehicle longitudinal direction, and a front bulkhead 106 fixed to a front end portion of the front side frame 102 and having a pair of left and right vertical members 106B, 106B extending in the vertical direction. As shown in fig. 11, each of the vertical members 106B includes: a longitudinal member main body 130; a mounting extension wall 125 extending outward in the vehicle width direction from the vehicle width direction outer end portion of the vertical member main body 130; and a first hook piece 126 bent rearward from the vehicle width direction outer end portion of the mounting extension wall 125 and engaged with the front side frame 102 by being hooked from above. As shown in fig. 13 (a) and 13 (b), the first hooking piece 126 includes a first vertical surface 126b extending in the vertical direction and a first inclined surface 126c continuous with an upper end portion of the first vertical surface 126b and inclined with respect to the vertical direction.

According to embodiment 2, the front bulkhead 106 can be temporarily fixed to the front side frame 102 by the first hook piece 126. Thus, since no jig is required, and no jig mounting work for each member or jig mounting work for each other is required, the assembling workability can be improved. Further, since the left and right vertical members 106B, 106B of the front bulkhead 106 each have the first hook piece 126 and the first hook pieces 126 are hooked to the front side frame 102 from above, the falling of the front bulkhead 106 can be suppressed. Further, since the first hook piece 126 is configured to include the first vertical surface 126b extending in the vertical direction and the first inclined surface 126c continuous with the upper end portion of the first vertical surface 126b and inclined with respect to the vertical direction, it has sufficient strength and rigidity and can support a load (self weight). Further, since the ridge line is formed between the first vertical surface 126b and the first inclined surface 126c, deformation of the first hook piece 126 in the out-of-plane direction can be suppressed.

As shown in fig. 8, a vehicle body front portion 101 according to embodiment 2 includes a bumper beam assembly 105 extending in the vehicle width direction and mounted between front end portions of a pair of left and right front side frames 102, 102. As shown in fig. 11, the vertical member 106B has a second hook piece 127 that is bent forward from the vehicle width direction outer side end portion of the attachment extension wall 125 below the first hook piece 126 and is hooked and engaged with the bumper beam assembly 105 from below. As shown in fig. 14 (a) and 14 (b), the second hooking piece 127 includes a second vertical surface 127b extending in the vertical direction and a second inclined surface 127c continuous with a lower end portion of the second vertical surface 127b and inclined with respect to the vertical direction.

According to this structure, the front bulkhead 106 can be temporarily fixed to the bumper beam assembly 105 by the second hook piece 127. Thus, since no jig is required, and no jig mounting work for each member or jig mounting work for each other is required, the assembling workability can be improved. Further, since the engagement force between the front bulkhead 106 and the front side frame 102 at the first hook piece 126 is increased by the load (self-weight) of the bumper beam assembly 105, the drop of the front bulkhead 106 can be further suppressed. Further, the second hook piece 127 includes a second vertical surface 127b extending in the vertical direction and a second inclined surface 127c continuous with a lower end portion of the second vertical surface 127b and inclined with respect to the vertical direction, and therefore, has sufficient strength and rigidity and can support a load. Further, since the ridge line is formed between the second vertical surface 127b and the second inclined surface 127c, deformation of the second hook piece 127 in the out-of-plane direction can be suppressed.

As shown in fig. 9, a vehicle body front portion 101 according to embodiment 2 includes a connecting plate 107 that is fixed to a front end portion of a front side frame 102 and connects the front side frame 102 and a bumper beam assembly 105 to each other. A bent flange portion 107a bent rearward is formed at the upper edge of the connecting plate 107. The first hooking piece 126 engages with the bent flange portion 107 a.

According to this configuration, even if a large load is applied, the bent flange portion 107a is less likely to deform, and therefore the first hooking piece 126 can be reliably engaged with the bent flange portion 107 a. In addition, in embodiment 2, since the first vertical surface 126b of the first hooking piece 126 abuts against and engages with the bent flange portion 107a, the bent portion between the first vertical surface 126b and the first inclined surface 126c becomes difficult to bend, compared to the case where the first inclined surface 126c abuts against and engages with the bent flange portion 107 a.

As shown in fig. 8, the bumper beam assembly 105 includes a pair of cylindrical left and right bumper beam extending portions 105A, 105A attached to the front end portions of the front side frames 102, respectively, and having front and rear openings, and a pair of left and right attachment plates 105B, 105B fixed to the rear end portions of the bumper beam extending portions 105A, respectively. As shown in fig. 10, the attachment plate 105B has an opening 105Ba facing the inside of the bumper beam extension 105A, and a pair of upper and lower fitting ribs 105Bb, 105Bb projecting forward on the upper and lower sides of the opening 105Ba and into which the rear end portion of the bumper beam extension 105A is fitted. The second hook piece 127 engages with the upper edge 105Bc of the opening 105 Ba.

According to this configuration, even if a large load is applied, the portion of the upper fitting rib 105Bb formed in the L-shaped cross section with the upper edge 105Bc of the opening 105Ba is less likely to deform, and therefore the second hooking piece 127 can be reliably engaged with the upper edge 105Bc of the opening 105 Ba. In the present embodiment, since the second vertical surface 127b of the second hooking piece 127 abuts against and engages with the upper edge 105Bc of the opening 105Ba, the bent portion between the second vertical surface 127b and the second inclined surface 127c is less likely to be bent than when the second inclined surface 127c abuts against and engages with the upper edge 105Bc of the opening 105 Ba.

As shown in fig. 9, the vehicle body front portion 101 according to embodiment 2 includes an upper coupling portion 150 to which the attachment extension wall 125, the coupling plate 107, and the attachment plate 105B are coupled. The upper coupling portion 150 is formed between the first and second hooking pieces 126 and 127.

According to this configuration, since the front bulkhead 106 and the bumper beam assembly 105 can be fixed to the front side frame 102 by the common upper joint portion 150, the assembling workability can be improved. For example, the bumper beam assembly 105 may be temporarily fixed to the front bulkhead 106, the front bulkhead 106 may be temporarily fixed to the front side frame 102, and finally, the three components may be aligned and then may be permanently fixed by the single bolt B.

As shown in fig. 11, a vehicle body front portion 101 according to embodiment 2 includes: a sub-frame support portion 103 extending downward from the front portion of the front side frame 102; a first hook piece 126 for temporarily fixing the longitudinal member 106B to the front side frame 102; and a lower fixing portion 140 that temporarily fixes the vertical member 106B and the subframe support portion 103 below the first hook piece 126.

With this structure, the vehicle body 108 including the front side frame 102 and the subframe support portion 103 and the front bulkhead 106 can be temporarily fixed and subjected to electrodeposition coating. After electrodeposition coating, the temporary fixation of the upper and lower portions is released, and after the engine is assembled to the vehicle body 108 and the radiator is assembled to the dash panel 106, both can be permanently fixed. This can improve productivity.

As shown in fig. 11, the vertical member body 130 has a recessed portion 119 recessed inward in the vehicle width direction over a predetermined region in the vertical direction from a lower position than the first hook piece 126. The second hooking piece 127 and the upper coupling portion 150 are formed on the vehicle width direction outer side with respect to the recessed portion 119.

With this configuration, the distance between the longitudinal member main body 130 and the first hook piece 126 can be shortened, and the strength and rigidity can be improved. Further, since the second hooking piece 127 is formed on the vehicle width direction outer side with respect to the recessed portion 119, the strength and rigidity of the attachment extension wall 125 can be improved, and the strength and rigidity of the second hooking piece 127 can also be improved. Further, the upper coupling portion 150 can be disposed near the cross-sectional center of the vertical member main body 130 to provide torsional rigidity to the front bulkhead 106.

As shown in fig. 11 and 12, the vertical member body 130 includes a rear member 120 as a first L-shaped cross-sectional member forming an inner wall and a rear wall, and a front member 110 as a second L-shaped cross-sectional member forming an outer wall and a front wall. The longitudinal member main body 130 is formed in a hollow cross section extending in the up-down direction. The mounting extension wall 125 is formed by extending the rear member 120 out of the front member 110 and the rear member 120 outward in the vehicle width direction with respect to the front member 110.

According to this configuration, since the mounting extension wall 125 is formed by the L-shaped cross-sectional member constituting the vertical member main body 130, the manufacturing can be simplified, and the manufacturing cost can be reduced.

While embodiment 2 of the present invention has been described in detail with reference to the drawings, the present invention is not limited thereto, and can be modified as appropriate without departing from the scope of the present invention.

The mounting extension wall 125 of embodiment 2 is formed by extending the rear member 120 out of the front member 110 and the rear member 120 toward the outside in the vehicle width direction than the front member 110, but may be formed by extending the front member 110 toward the outside in the vehicle width direction than the rear member 120.

In embodiment 2, the longitudinal member main body 130 is formed in a rectangular hollow cross section, and may be formed in a circular or polygonal hollow cross section other than a rectangular one, for example.

The first inclined surface 126c of embodiment 2 is continuous with the upper end portion of the first vertical surface 126b, but may be continuous with the lower end portion of the first vertical surface 126 b. The second inclined surface 127c of embodiment 2 is continuous with the lower end portion of the second vertical surface 127b, but may be continuous with the upper end portion of the second vertical surface 127 b.

Next, a vehicle to which the vehicle body front portion structure according to embodiment 3 of the present invention is applied will be described in detail below.

The vehicle body front structure according to embodiment 3 is a cooling equipment mounting structure that is a composite structure of a front bulkhead and a bracket that supports an intercooler (cooling equipment). As will be described in detail later, the cooling equipment mounting structure is mainly characterized in that: the vertical member and the horizontal member constituting the front partition plate, and the bracket are mutually coupled.

As for the cooling equipment mounting structure exemplified in embodiment 3, a cooling equipment mounting structure mounted on a turbocharged vehicle including an intercooler is assumed, but the present invention is not limited to this. The cooling equipment mounting structure of the present embodiment will be described below after the structure of the front portion of the vehicle body to which the cooling equipment mounting structure is applied is described.

As shown in fig. 20, a vehicle body front portion 201 in the present embodiment includes a pair of left and right front side frames 202, a subframe 204, and a dash panel 206.

The front side frame 202 is a metal structural member extending in the vehicle front-rear direction. The front side frame 202 is formed in a hollow structure having a closed cross section. A connecting plate 207 is fixed to the front end portions of the pair of left and right front side frames 202, 202. The connecting plate 207 connects the front end portion of the front side frame 202, a longitudinal member 206B of the front bulkhead 206, which will be described later, the front end portion of the upper member 219, and the rear portion of the bumper beam assembly, which is not shown, to each other.

The subframe 204 is fastened to the front side frame 202 via a subframe support portion 203 whose front portion hangs down at the front portion of the front side frame 202. Although not shown, the subframe 204 supports suspension components and mounts a power unit.

In fig. 20, reference numeral 226 denotes a connection frame in which the upper end portion of the dash panel 206 is supported by the front end and the rear end portion is supported by the upper member 219. Reference numeral 227 denotes a damper housing supported by an upper wall of the upper member 219 on the power mounting chamber side and supported by an upper surface of the front side frame 202.

The heat sink 209 is placed on a cross member 206A on the lower side of the front partition 206, which will be described later. The upper portion of the heat sink 209 is supported by heat sink supporting brackets 209a disposed on both left and right sides of the upper cross member 206A.

The radiator support bracket 209a corresponds to the "upper bracket" in the technical claims.

The intercooler 208 is disposed in front of the radiator 209 and attached to the front bulkhead 206. In fig. 20, the radiator 209 and the intercooler 208 are shown by broken lines (two-dot chain lines) for convenience of drawing.

As shown in fig. 21, the intercooler 208 includes an intercooler body 208a and a hose coupling portion 208 b. Fig. 21 shows a left end portion of the intercooler 208 indicated by a broken line (two-dot chain line) in fig. 20, but a hose coupling portion 208b is also provided at a right end portion of the intercooler 208 (not shown).

Mounting seats 231 are formed on the upper and lower sides of the hose coupling portion 208 b. The lower portion of the hose coupling portion 208b is supported by a bracket 205, which will be described later in detail, via the mounting seat 231.

The upper portion of the hose coupling portion 208B is fixed to a vertical member 206B of the front bulkhead 206, which will be described later in detail, via the mounting seat 231 and the support member 233.

The upper portion of the hose coupling portion 208b corresponds to the "upper portion of the intercooler" in the claims.

The support member 233 in the present embodiment is formed of a plate body bent in an L-shape, and a flange 233a is formed at an edge portion of the support member 233 along the longitudinal direction.

One end of the air hose 232 is connected to the hose connection portion 208 b. The air hose 232 corresponds to the "piping" in the present embodiment.

One end of the air hose 232 is also connected to a hose connection portion on the right side, not shown. The air hose 232 extends from the hose coupling portion 208B side toward the lower end portion side of the vertical member 206B, and then, as shown in fig. 20, changes its direction from the vehicle width direction outer side to the vehicle width direction inner side at the lower end portion of the vertical member 206B, and passes and extends from above the front side frame 202.

One of the air-flow hoses 232 extending from the left and right hose connection portions 208b is connected to a turbocharger, not shown, and the other is connected to an air cleaner, not shown.

As shown in fig. 20, the cooling equipment mounting structure S mainly includes a front bulkhead 206 and a pair of left and right brackets 205 and 205.

As shown in fig. 20, the dash panel 206 is formed of a substantially rectangular frame body in a front view of the vehicle body. As described above, the front bulkhead 206 is attached with the intercooler 208 as a cooling device via the pair of left and right brackets 205, and supports the radiator 209.

The front bulkhead 206 includes a pair of upper and lower cross members 206A, a pair of left and right vertical members 206B, and a reinforcement member 280 (see fig. 23 (B)) described later.

The cross member 206A shown in fig. 20 is a metal structural member extending in the vehicle width direction. The cross member 206A is formed in a hollow structure or a groove shape having a closed cross section, for example, by combining a plurality of steel plates. The upper cross member 206A is disposed between upper end portions of the pair of left and right vertical members 206B, 206B. The lower cross member 206A is disposed between the lower ends of the pair of left and right vertical members 206B, 206B.

As shown in fig. 22, the lower cross member 206A is a member formed by welding a cross member main body 206A1 and a cover member 206A2, which are formed by press-working metal plates, respectively. In fig. 22, reference numeral P denotes a recess in which a base (not shown) for supporting a lower portion of the heat sink 209 (see fig. 20) is disposed.

As shown in fig. 23 (a), the cross member main body 206a1 has a hat-shaped cross section that opens upward when viewed in longitudinal section along the vehicle front-rear direction.

The cross member body 206a1 includes a bottom wall 260, a front wall 261, and a rear side wall 262 that form a hat-shaped cross section. The cross member main body 206a1 includes a front eaves portion 263 extending forward from an upper edge of the front wall 261, and a rear eaves portion 264 extending rearward of the vehicle from an upper edge of the rear side wall 262.

As shown in fig. 23 (a), the cover member 206a2 closes the hat-shaped upward opening in cross section of the cross member main body 206a1 further inward in the vehicle width direction than the vertical member 206B (see fig. 23 (B)).

The cover member 206a2 has a hat-shaped cross section that opens upward, and is shaped to correspond to the hat-shaped cross section of the cross member main body 206a 1.

That is, the lid member 206a2 includes a lid bottom wall 265, a lid front wall 266, a lid rear side wall 267, a lid front eaves portion 268, and a lid rear eaves portion 269. The cover bottom wall 265 extends in the vehicle front-rear direction and the vehicle width direction. The cover front wall 266 extends upward from the front edge of the cover bottom wall 265. The lid rear side wall 267 extends upward from the rear edge of the lid bottom wall 265. A lid front eaves portion 268 extends forward from an upper edge of the lid front wall 266. The lid back brim 269 extends rearward from an upper edge of the lid back sidewall 267.

The cover eave 268 is welded to the upper surface of the eave 263 of the cross member body 206a 1. The cover eave 269 is welded to the upper surface of the eave 264 of the cross member body 206a 1. In fig. 23 (a), reference numeral 205 denotes a bracket.

As shown in fig. 23 (b), a joining flange 270 extending upward is formed at the vehicle width direction outer side end portion of the cover member 206a 2. The joining flange 270 is joined to a second inner side wall 224 of the vertical member 206B, which will be described later, by welding.

The second inner side wall 224 corresponds to the "inner side wall of the longitudinal member" in the technical aspect.

The vehicle transverse direction outer side end portion of the cross member main body 206a1 extending in the hat-shaped cross section at the lower end portion of the vertical member 206B is open upward without the lid member 206a2 being disposed.

Further, in fig. 23 (b), reference numeral 260 is a bottom wall of the cross member body 206a1, reference numeral 261 is a front wall of the cross member body 206a1, and reference numeral 263 is a front eaves portion of the cross member body 206a 1. Reference numeral 205 is a bracket, and reference numeral 280 is a reinforcing member.

As shown in fig. 20, the vertical member 206B is a metal structural member that extends in the vertical direction on the inside in the vehicle width direction of the front end portion of the front side frame 202.

As shown in fig. 22, the lower end of the vertical member 206B is curved so as to gradually protrude forward from the upper portion toward the lower portion.

Such a longitudinal member 206B is formed into a hollow structure having a closed cross section by combining a plurality of steel plates, for example. As shown in fig. 22 and 24, the vertical member 206B includes a front member 210 and a rear member 220. The front member 210 corresponds to the "first L-shaped cross-sectional member" of the invention. The rear member 220 corresponds to the "second L-shaped cross-sectional member" of the invention.

As shown in fig. 22, the front member 210 (first L-shaped cross-sectional member) is a metal member that constitutes the front wall portion and the outer wall of the vertical member 206B. The front side member 210 is divided into three parts, a front side upper member 210A, a front side middle member 210B, and a front side lower member 210C.

The front upper member 210A has a substantially L-shape in plan view. The front upper member 210A integrally includes a first front wall portion 211, a first outer side wall 212, and first flanges 213 and 214.

The first front wall portion 211 constitutes an upper portion side of the front wall portion of the vertical member 206B, and extends in the vertical direction and the vehicle width direction. The first outer side wall 212 is a portion constituting an upper side of the outer side wall of the longitudinal member 206B, and extends in the vertical direction and the vehicle front-rear direction. The first outer side wall 212 extends rearward from the vehicle width direction outer side end portion of the first front wall portion 211.

The first flange 213 extends forward from the vehicle width direction inner end portion of the first front wall portion 211, and extends in the vertical direction and the vehicle front-rear direction. The first flange 213 is fixed to a first inner wall 222 of a rear side member 220, which will be described later, by welding or the like. The first flange 214 extends outward in the vehicle width direction from the rear end portion of the first outer side wall 212, and extends in the vertical direction and the vehicle width direction. The first flange 214 is fixed to a first rear side wall 221 of a rear member 220, which will be described later, by welding or the like.

The front middle member 210B has a substantially L-shape in plan view. The front middle member 210B integrally includes a second front wall portion 215, a second outer wall 216, and second flanges 217 and 218.

The second front wall portion 215 is a portion constituting a lower portion side of the front wall portion of the vertical member 206B, and extends in the vertical direction and the vehicle width direction. The second outer wall 216 is a portion constituting a lower portion side of the outer wall of the longitudinal member 206B, and extends in the vertical direction and the vehicle front-rear direction. The second outer side wall 216 extends rearward from the vehicle width direction outer end portion of the second front wall portion 215.

The second flange 217 extends forward from the vehicle width direction inner end portion of the second front wall portion 215, and extends in the vertical direction and the vehicle front-rear direction. The second flange 217 is fixed to a second inner wall 224 of the rear side member 220, which will be described later, by welding or the like. The second flange 218 extends outward in the vehicle width direction from a rear end portion of the second outer wall 216, and extends in the vertical direction and the vehicle width direction. The second flange 218 is fixed to a second rear side wall 223 of the rear member 220, which will be described later, by welding, bolts, or the like.

As shown in fig. 22, the front lower member 210C is a metal plate-like member that connects the front middle member 210B and the lower cross member 206A. The front lower member 210C integrally includes a third front wall 271, a third outer wall 272, and flanges 273 to 276.

The flange 274 corresponds to a "lower end flange" in the claims.

The third front wall portion 271 is a portion extending from the lower end of the second front wall portion 215 to the cross member 206A, and extends in the obliquely vertical direction and the vehicle width direction. The third outer side wall 272 extends from the lower end of the second outer side wall 216 to the cross member 206A, and extends in the vertical direction and the vehicle front-rear direction. The third outer side wall 272 extends rearward and downward from the vehicle width direction outer side end portion of the third front wall portion 271.

The flange 273 extends forward from the vehicle width direction inner end portion of the third front wall portion 271, and extends in the vertical direction and the vehicle front-rear direction. The flange 273 is fixed to the second inner side wall 224 of the rear side member 220 by welding or the like. The flange 274 extends forward from the front end portion of the third front wall portion 271, and extends in the vehicle front-rear direction and the vehicle width direction. The flange 274 is fixed in place to the cross member 206A by welding or the like. The flange 275 extends outward in the vehicle width direction from the rear end portion of the third outer wall 272, and extends in the vertical direction and the vehicle width direction. The flange 275 is fixed to the second rear side wall 223 of the rear side member 220 by welding or the like. The flange 276 extends outward in the vehicle width direction from a lower end portion of the third outer side wall 272, and extends in the vehicle front-rear direction and the vehicle width direction. Flange 276 is disposed on the interior of cross member 206A.

As shown in fig. 24, the rear member 220 (second L-shaped cross-sectional member) is a metal member that constitutes the rear wall and the inner wall of the vertical member 206B. The rear side member 220 is divided into two parts, a rear side upper member 220A and a rear side lower member 220B. The rear upper member 220A has an L-shape in plan view. The rear upper member 220A integrally includes a first rear sidewall 221 and a first inner sidewall 222.

The first rear side wall 221 is a portion constituting an upper side of the rear side wall of the vertical member 206B, and extends in the vertical direction and the vehicle width direction. The first inner side wall 222 is a portion constituting an upper side of the inner side wall of the longitudinal member 206B, and extends in the vertical direction and the vehicle front-rear direction. The first inner side wall 222 extends forward from the vehicle width direction inner end portion of the first rear side wall 221.

The rear lower member 220B has an L-shape in plan view. The rear lower member 220B is integrally provided with a second rear side wall 223 and a second inner side wall 224.

The second rear side wall 223 is a portion constituting a lower portion side of the rear side wall of the vertical member 206B, and extends in the vertical direction and the vehicle width direction. The lower portion of the second rear side wall 223 shown in fig. 22 overlaps the second flange 218 of the front middle member 210B and the front end portion of the subframe support portion 203, and is coupled to each other by a bolt B from the front. In this way, the lower fixing portion 240 to which the rear lower member 220B, the front middle member 210B, and the subframe supporting portion 203 are fixed is formed. The second inner side wall 224 shown in fig. 24 is a portion constituting the lower side of the inner side wall of the vertical member 206B, and extends in the vertical direction and the vehicle front-rear direction. The second inner side wall 224 extends forward from the vehicle width direction inner end portion of the second rear side wall 223.

As shown in fig. 24, the reinforcing member 280 is a metal plate-like member that reinforces a connecting portion between the lower end portion of the vertical member 206B and the vehicle width direction outer side end portion of the horizontal member 206A. The reinforcing member 280 is disposed inside the cross member 206A.

As shown in fig. 25, the reinforcing member 280 integrally includes a first plate portion 281, a second plate portion 282, a front flange 283, and a rear flange 284.

The first plate portion 281 corresponds to the "lower portion disposed along the bottom wall of the cross member" in the technical description. The second plate portion 282, the front flange 283, and the rear flange 284 correspond to the "upper portion rising from the edge of the lower portion" in the claims.

A raised portion 280a protruding upward from the general surface is formed in the center of the first plate portion 281.

As shown in fig. 23 (b), the first plate portion 281 is fixed to the bottom wall 260 of the cross member main body 206a1 by welding or the like, and extends in the vehicle front-rear direction and the vehicle width direction.

As shown in fig. 22, the first plate portion 281 is sandwiched between the flange 276 of the vertical member 206B and the bottom wall 260 of the horizontal member 206A. The first plate portion 281 is fixed to the flange 276 and the cross member 206A by welding or the like.

Returning to fig. 25, the second plate portion 282 extends upward from the vehicle width direction inner end portion of the first plate portion 281, and extends in the vertical direction and the vehicle front-rear direction.

Further, a bead 282a extending in the up-down direction is formed at substantially the center of the second plate portion 282 in the vehicle front-rear direction.

The second plate portion 282 is fixed to the second inner wall 224 of the rear member 220 by welding or the like.

The front flange 283 extends upward from the front end of the first plate 281. The front flange 283 is fixed to the front wall 261 (see fig. 23 b) of the cross member main body 206a1 (see fig. 23 b) by welding or the like.

The rear flange 284 extends upward from the rear end of the first plate portion 281. The rear flange 284 is fixed to the rear side wall 262 of the cross member main body 206a1 (see fig. 23B) by welding or the like via the second rear side wall 223 (see fig. 23B) of the vertical member 206B (see fig. 23B).

The second plate portion 282 and the front flange 283 are fixed to each other, and the second plate portion 282 and the rear flange 284 are fixed to each other by welding or the like.

The bracket 205 will be described below with reference to fig. 26 (a), 26 (b), and 26 (c).

The bracket 205 is formed of a bent plate body.

The bracket 205 includes: a vertical wall 251 disposed along the front wall 261 (see fig. 26 c) of the cross member main body 206a1 (see fig. 26 c); a horizontal wall 252 bent forward from the upper edge of the vertical wall 251 to extend in an L-shape; a fold line 253 that extends in the vehicle width direction (left-right direction) so as to form a front edge of the lateral wall 252; and a raised portion 254 formed to bulge upward with the fold line as a boundary.

The lateral wall 252 and the ridge 254 of the bracket 205, which are formed to extend forward from the lateral side of the cross member main body 206a1, constitute an "extension" in the claims.

The vertical wall 251 is formed in a substantially wavy plate shape in which concave portions and convex portions are alternately arranged in the vehicle width direction. The vertical wall 251 is joined to the front wall 261 (see fig. 26 c) of the cross member main body 206a1 (see fig. 26 c) at a portion that contacts the front wall 261.

The lateral wall 252 is disposed along the lower surface of the front edge 263 (see fig. 26 c) of the cross member main body 206a1 (see fig. 26 c).

A recess 255 is formed in the center of the ridge 254. The concave portion 255 is recessed on the upper side of the bracket 205 as shown in fig. 26 (a), and protrudes on the lower side of the bracket 205 as shown in fig. 26 (b).

As shown in fig. 26 (c), a base M is disposed in the recess 255. In fig. 26 (a) and 26 (b), reference numeral 256 denotes a bolt insertion hole for mounting the base M (fig. 26 (c)) in the recess 255.

As shown in fig. 26 (a) and 26 (b), the bracket 205 is formed with a first rib 256a and a second rib 256 b.

The first reinforcing bead 256a is formed at the ridge portion 254. The first rib 256a protrudes above the bracket 205 as shown in fig. 26 (a) and is recessed below the bracket 205 as shown in fig. 26 (b).

The first rib 256a is formed to extend obliquely rearward from the recess 255 side. The first rib 256a extends rearward to the fold line 253, and the rear end portion of the first rib 256a intersects the fold line 253.

The second reinforcing bead 256b is formed on the lateral wall 252. The second rib 256b is recessed on the upper side of the bracket 205 as shown in fig. 26 (a) and protrudes on the lower side of the bracket 205 as shown in fig. 26 (b).

The second bead 256b is formed at a substantially center of the lateral wall 252 in the vehicle width direction so as to extend in the vehicle front-rear direction. The second bead 256b extends forward to the fold line 253 with the vertical wall 251 side as a base end, and the tip end portion of the second bead 256b intersects with the fold line 253.

As described above, such first and second reinforcing beads 256a and 256b are formed in such a manner as to protrude in the upward and downward opposite directions from each other. The first rib 256a and the second rib 256b are formed so as to be opposite to each other across the folding line 253 and not to intersect with each other except for an intersection (joint) with the folding line 253.

The bracket 205 has a pair of left and right bent flanges (bent flanges) 257 and 257. The bent flanges 257 extend in the vehicle front-rear direction on both sides in the vehicle width direction of the lateral wall 252 and the raised portion 254. That is, the bent flange 257 extends continuously from the lateral wall 252 to the raised portion 254.

Although not shown, the bent flange 257 formed in the lateral wall 252 overlapping (see fig. 26 c) the front edge portion 263 of the cross member main body 206a1 (see fig. 26 c) partially overlaps the second bead 256b (see fig. 26a and 26 b) in the vehicle width direction.

Such bent flanges 257 are formed such that left and right edge portions of the lateral wall 252 and the raised portion 254 are bent downward.

Next, a coupling structure of the bracket 205 to the front bulkhead 206 will be described.

As shown in fig. 27, the vertical wall 251 of the bracket 205 has three welding points (joint portions) W1, W2, and W3 in the vehicle width direction with respect to the front wall 261 of the cross member body 206a1 in a front view of the vehicle body.

Two spot welds (two lap welds) are contemplated for weld point W1. Specifically, as shown in fig. 23 (a), the bracket 205 is overlap-welded to the front wall 261 of the cross member main body 206a 1.

The welding point W2 assumes three spot welds (three lap welds). Specifically, as shown in fig. 23 (b), the bracket 205, the front wall 261 of the cross member main body 206a1, and the front flange 283 of the reinforcing member 280 are welded to each other.

Weld point W3 contemplates two spot welds. Specifically, although not shown, the bracket 205 is welded to the front wall 261 of the cross member main body 206a1 in an overlapping manner. Incidentally, the joining of the front wall 261 and the flange 283 is avoided by forming a gap between the front wall 261 and the flange 283.

The lateral wall 252 of the bracket 205 has four welding points (joint portions) W4, W5, W6, and W7 in the vehicle width direction with respect to the front visor portion 261 of the cross member body 206a 1.

Three spot welds are envisaged for welds W4, W5. Specifically, as shown in fig. 23 (a), the bracket 205, the front edge 263 of the cross member main body 206a1, and the cover front edge 268 of the cover member 206a2 are welded to each other.

Weld point W6 contemplates three spot welds. Specifically, as shown in fig. 23 (B), the bracket 205, the front edge portion 263 of the cross member main body 206a1, and the flange 274 of the vertical member 206B are welded to each other.

Weld point W7 contemplates two spot welds. Specifically, although not shown, the bracket 205 is welded to the front edge 263 of the cross member main body 206a1 in an overlapping manner.

The welding points W1 to W7 are set as follows: the second inner wall 224 at the lower end portion of the vertical member 206B is divided in the vehicle width direction as a boundary in the vehicle front view.

Specifically, the welding points W1, W4, and W5 (joint portions) are set on the inside in the vehicle width direction around the second inner wall 224, and the welding points W2, W3, W6, and W7 (joint portions) are set on the outside in the vehicle width direction.

Next, the operational effects of the cooling equipment mounting structure S according to embodiment 3 will be described.

As shown in fig. 23 (B), the cooling device mounting structure S as described above has the lower end portions of the side members 206B extending into the hat-shaped cross section of the cross member main body 206A1 that opens upward, and is joined to the front wall 261 of the cross member 206A via the reinforcing member 280.

Further, the bracket 205 is coupled to the front eaves 263 (eaves) of the cross member 206B, and is coupled to the reinforcing member 280 via the front wall 261.

As shown in fig. 27, the connecting portion of the bracket 205 to the front edge portion 263 is formed inside and outside the vehicle width direction about the second inner wall 224 of the vertical member 206B.

According to this cooling equipment mounting structure S, the bonding strength of the corner portion where the cross member 206A and the vertical member 206B intersect can be improved.

The cooling equipment mounting structure S can thereby suppress torsional deformation that occurs at the corner due to vertical displacement of the front end portion of the front side frame 202, and can improve the running stability of the vehicle.

Further, according to this cooling equipment mounting structure S, the supporting stability of the intercooler 208 (cooling equipment) mounted thereon is excellent, and it is possible to prevent vibration and noise generated by the intercooler 208 from propagating into the vehicle interior.

In addition, as shown in fig. 23 (B), in the cooling equipment mounting structure S of embodiment 3, the second plate portion 282, the front flange 283 and the rear flange 284, which constitute the upper portion of the reinforcing member 280, are joined to the second inner side wall 224 of the vertical member 26B, the front wall 261 of the cross member 206A and the second rear side wall 223 of the vertical member 206B, respectively.

As shown in fig. 22, the first plate portion 281 constituting the lower portion of the reinforcing member 280 is sandwiched between the bottom wall 260 of the cross member 204A and the flange 276 of the vertical member 206A.

According to this cooling equipment mounting structure S, the bonding strength of the corner portion where the cross member 206A and the vertical member 206B intersect can be further improved.

In addition, according to the cooling device mounting structure S, since the reinforcing member 280 can be easily manufactured by press forming or the like, the manufacturing process can be simplified.

As shown in fig. 26 (a) to 26 (c), the bracket 205 in the cooling device mounting structure S according to embodiment 3 has bent flanges 257 extending in the vehicle longitudinal direction on both sides in the vehicle width direction of the lateral wall 252 and the raised portion 254.

The bracket 205 of this cooling equipment mounting structure S can further improve the support rigidity of the intercooler 208. Therefore, the propagation of vibration or noise generated by the intercooler 208 into the vehicle interior can be more effectively prevented.

In the bracket 205 in the cooling device mounting structure S according to embodiment 3, the first rib 256a is formed on the raised portion 254, and the second rib 256b is formed on the lateral wall 252.

As shown in fig. 26c, according to the bracket 205 of the cooling equipment mounting structure S, even if the recess 255 in which the base M is disposed in the raised portion 254 is formed, sufficient support strength with respect to the intercooler 208 (see fig. 20) can be exhibited.

Further, by providing the bracket 205 with the first rib 256a and the second rib 256b, the rigidity and strength of the bracket 205 can be further improved.

In the cooling equipment mounting structure S according to embodiment 3, as shown in fig. 23 (a), the bracket 205 is welded so as to overlap three sheets of the front overhang portion 263 of the cross member 206A between the bracket 205 and the cover front overhang portion 268 of the cover member 206A 2.

As shown in fig. 23B, the bracket 205 is coupled to the flanges 274 (lower end flanges) of the vertical member 206B so as to overlap three sheets with the front edge 263 of the horizontal member main body 206a1 interposed therebetween.

According to this cooling equipment mounting structure S, the bonding strength between the cross member 206A and the vertical member 206B can be further improved, and the support strength with respect to the intercooler 208 (see fig. 20) can also be improved.

As shown in fig. 21, the cooling equipment mounting structure S according to embodiment 3 supports an intercooler 208 by a bracket 205.

In addition, the cooling device mounting structure S according to embodiment 3 supports the lower portion of the radiator 209 (see fig. 20) by the cover member 206a2 shown in fig. 24.

According to this cooling equipment mounting structure S, the space efficiency of the intercooler 208 and the radiator 209 can be improved, and the support strength thereof can be improved.

In addition, in the cooling equipment mounting structure S of embodiment 3, as shown in fig. 22, the lower end portion of the vertical member 206B protrudes forward.

As shown in fig. 20, the upper portion of the heat sink 209 is supported by a heat sink support bracket 209a (upper bracket).

In this cooling equipment mounting structure S, the cross member 206A can be displaced forward by projecting the lower end portion of the vertical member 206B forward. The upper portion of the heat sink 209 is supported by a heat sink support bracket 209a extending forward, whereby the heat sink 209 can be supported by the front bulkhead 206 by being displaced forward.

According to this cooling equipment mounting structure S, a component arrangement space can be secured behind the front bulkhead 206.

As shown in fig. 21, the cooling equipment mounting structure S of the present embodiment fixes the intercooler 208 via the bracket 205 (bracket for the intercooler).

Further, the air-duct hose 232 (pipe) extending from the intercooler 208 extends from the hose connecting portion 208B side toward the lower end portion side of the vertical member 206B, and then, as shown in fig. 20, changes its direction from the vehicle width direction outer side to the vehicle width direction inner side at the lower end portion of the vertical member 206B to extend toward the front side frame 202 side.

According to this cooling equipment mounting structure S, the periphery of the intercooler 208 can be configured more compactly.

While embodiment 3 of the present invention has been described above, the present invention is not limited to embodiment 3 described above, and can be implemented in various ways.

For example, in embodiment 3, a cooling device mounting structure S in which the intercooler 208 is supported as a cooling device is described, but the present invention is not limited to a turbocharged vehicle in which the cooling device mounting structure S is mounted.

Therefore, the cooling device is not limited to the intercooler 208, and may be an evaporator of an air conditioner, or may be a radiator 209.

In the present invention, although the description has been made on each of the embodiments from embodiment 1 to embodiment 3, the structures described in these embodiments 1 to 3 may be combined as appropriate.

Description of the reference numerals

10 front part of vehicle body

18 front baffle

20 ground contact guard

20a upper wall

20b front wall

20c lower wall

24 longitudinal member

28 lower cross beam

29a front flange

29c bottom surface part

34 front obstacle detection sensor

36 level difference part

38-step flange

40 access hole

42 vehicle body joint

44 discharge part

46 support part 1

48 No. 2 support

52 guide member

54 guide surface

56 recess

68 cover part

101 front part of vehicle body

102 front side frame

103 subframe support part

105 bumper beam assembly

105A bumper beam extension

105B mounting plate

105Ba opening

105Bb fitting rib

Upper edge of 105Bc

105C bumper beam

106 front baffle

106B longitudinal member

107 connecting plate

107a bent flange part

110 front piece (second L-shaped section piece)

119 recess

120 rear part (first L-shaped section part)

125 installation extension wall

126 first hook

126b first vertical plane

126c first skew surface

127 second hook tab

127b second vertical plane

127c second skew surface

130 longitudinal member body

140 lower fixing part

150 upper side joint part

201 vehicle body front part

202 front side frame

203 subframe support part

204 subframe

205 bracket

206 front baffle

206A Cross Member

206A1 Cross Member body

206A2 cover part

206B longitudinal member

207 connecting plate

210 front piece

210A front side upper part

210B front side middle part

210C front lower part

211 first front wall part

212 first outer side wall

215 second front wall portion

216 second outer side wall

220 rear part

220A rear upper part

220B rear lower part

221 first rear side wall

222 first inner side wall

223 second rear side wall

224 second inner side wall

230 longitudinal member body

240 lower fixing part

263 front eaves part (eaves part)

271 third front wall part

272 third outer side wall

274 flange (lower end flange)

280 reinforcing member

281 first plate part (lower part of reinforcing member)

282 second plate part (Upper part of reinforcing member)

283 front flange (Upper part of the reinforcement)

284 rear flange (upper part of the reinforcing member).