阅读说明：本技术 一种汽车后纵梁结构、总成及汽车 (Automobile rear longitudinal beam structure, assembly and automobile ) 是由 林佳武 杨宏 李玄霜 耿富荣 于 2020-06-10 设计创作，主要内容包括：本发明属于汽车零部件技术领域,特别是涉及一种汽车后纵梁结构、总成及汽车。该汽车后纵梁结构包括后纵梁本体,后纵梁本体的前端折弯形成用于连接汽车门槛的折弯连接板,折弯连接板包括第一侧板、第二侧板和第三侧板；第一侧板和第三侧板位于第二侧板的相对两侧；第二侧板的一端与第一侧板与呈第一预设角度连接,第二侧板的另一端与第三侧板呈第二预设角度连接。该后纵梁结构实现了所述折弯连接板与所述汽车门槛三个面的紧密连接,保证了所述汽车门槛后端具有优异性能和良好的后碰性能；且无需另外的连接件即可实现所述汽车后纵梁与所述汽车门槛的连接,进而降低了该汽车后纵梁结构结构的重量,有利于汽车的轻量化设计。(The invention belongs to the technical field of automobile parts, and particularly relates to an automobile rear longitudinal beam structure, an automobile rear longitudinal beam assembly and an automobile. The automobile rear longitudinal beam structure comprises a rear longitudinal beam body, wherein the front end of the rear longitudinal beam body is bent to form a bending connecting plate for connecting an automobile threshold, and the bending connecting plate comprises a first side plate, a second side plate and a third side plate; the first side plate and the third side plate are positioned at two opposite sides of the second side plate; one end of the second side plate is connected with the first side plate at a first preset angle, and the other end of the second side plate is connected with the third side plate at a second preset angle. The rear longitudinal beam structure realizes the tight connection of the bending connecting plate and three surfaces of the automobile threshold, and ensures that the rear end of the automobile threshold has excellent performance and good rear collision performance; and need not other connecting piece can realize the longeron behind the car with the connection of car threshold, and then reduced the weight of this longeron structure behind the car, be favorable to the lightweight design of car.)

1. The automobile rear longitudinal beam structure is characterized by comprising a rear longitudinal beam body, wherein the front end of the rear longitudinal beam body is bent to form a bending connecting plate for connecting an automobile threshold, and the bending connecting plate comprises a first side plate, a second side plate and a third side plate; the first side panel and the third side panel are located on opposite sides of the second side panel; one end of the second side plate is connected with the first side plate at a first preset angle, and the other end of the second side plate is connected with the third side plate at a second preset angle; the first side plate is used for connecting the side surface of the door sill of the automobile; the second side plate is used for connecting the top surface of the door sill of the automobile; the third side plate is used for being connected with a threshold flanging of the automobile threshold.

2. The automobile rear longitudinal beam structure according to claim 1, further comprising a main rib and a plurality of auxiliary ribs both protruding from the rear longitudinal beam body, wherein the main rib connects the plurality of auxiliary ribs, and the main rib is higher than the auxiliary ribs.

3. The automobile rear longitudinal beam structure according to claim 1, wherein a first predetermined angle between the first side plate and the second side plate is 90 degrees, a second predetermined angle between the second side plate and the third side plate is 90 degrees, and the bending connection plate is formed byAnd (4) a mold structure.

4. An automobile rear longitudinal beam assembly, which is characterized by comprising a first cross beam, a second cross beam, a third cross beam, a fourth cross beam, a front longitudinal beam, an anti-collision longitudinal beam and an automobile rear longitudinal beam structure according to any one of claims 1 to 3; the first cross beam, the second cross beam, the third cross beam and the fourth cross beam are sequentially connected to the rear longitudinal beam body and are parallel to each other; the front longitudinal beam is parallel to the anti-collision longitudinal beam; the front longitudinal beam is perpendicular to the first cross beam; the front longitudinal beam and the first cross beam are connected to the front end of the rear longitudinal beam body; the anti-collision longitudinal beam and the fourth cross beam are connected to the rear end of the rear longitudinal beam body.

5. The automobile rear side member assembly according to claim 4, wherein a first projection is protrudingly provided on the rear side member body; a sixth groove is formed in the first cross beam; the first cross beam is overlapped on the first convex part through the sixth groove;

the rear longitudinal beam body is sunken to form a first groove; a second convex part is arranged on the front longitudinal beam, and the front longitudinal beam is inserted into the first groove through the second convex part;

the first convex part and the first groove are both arranged at the front end of the rear longitudinal beam body; the first cross beam is perpendicular to the automobile threshold connected to the bending connecting plate; the extension line of the first cross beam is intersected with the extension line of the automobile threshold, and the intersection point of the extension line of the first cross beam and the extension line of the automobile threshold is positioned at the front end of the rear longitudinal beam body; the front longitudinal beam is parallel to the automobile threshold.

6. The automobile rear side rail assembly according to claim 4, wherein a third protrusion is provided on the second cross member; a second groove is formed in the rear longitudinal beam body in a recessed mode; the second cross beam is inserted into the second groove through the third convex part.

7. The automobile rear side rail assembly of claim 4, further comprising a web; a fourth convex part is arranged on the third cross beam; the first side plate is bent to form a third groove; the fourth convex part is fixedly connected in the third groove through the connecting plate.

8. The automobile rear longitudinal beam assembly according to claim 7, wherein a first mounting portion for mounting a damping spring is further provided on the rear longitudinal beam body, and the first mounting portion is located at an intersection of an extension line of the third cross beam and the rear longitudinal beam body.

9. The automobile rear side rail assembly according to claim 4, wherein a fifth convex portion is provided on the fourth cross member; a fourth groove is formed in the rear longitudinal beam body in a recessed mode; the fourth cross beam is inserted into the fourth groove through the fifth convex part;

a sixth convex part is arranged on the anti-collision longitudinal beam; a fifth groove is formed in the rear longitudinal beam body in a recessed mode; the anti-collision longitudinal beam is inserted into the fifth groove through the sixth convex part;

the fourth groove and the fifth groove are both arranged at the rear end of the rear longitudinal beam body; the extension line of the anti-collision longitudinal beam is intersected with the extension line of the fourth cross beam, and the intersection point of the extension line of the anti-collision longitudinal beam and the extension line of the fourth cross beam is located at the rear end of the rear longitudinal beam body.

10. The automobile rear side member assembly according to claim 4, wherein the rear end of the rear side member body is further provided with a second mounting portion for mounting an automobile sub frame.

11. An automobile comprising an automobile threshold and the automobile rear side member assembly of any one of claims 4 to 10; the automobile doorsill comprises a doorsill top surface, a doorsill side surface and a doorsill flanging arranged on the doorsill top surface, and the doorsill side surface is connected with the doorsill top surface;

the first side plate is connected with the side surface of the threshold; the second side plate is connected with the top surface of the threshold; the third side plate is connected with the threshold flanging.

Technical Field

The invention belongs to the technical field of automobile parts, and particularly relates to an automobile rear longitudinal beam structure, an automobile rear longitudinal beam assembly and an automobile.

Background

The automobile rear longitudinal beam assembly is used as one of key parts of an automobile body, and plays a role in bearing and absorbing collision impact in an automobile structure. In the prior art, an automobile rear longitudinal beam assembly is generally formed by welding steel parts, generally consists of a plurality of steel stamping parts, and is more in part number, complex in structure and low in welding precision; in addition, when the steel automobile rear longitudinal beam assembly is connected with other structural members of an automobile, accessory parts are often required to be added at the joint of the steel automobile rear longitudinal beam assembly to improve the rigidity of the joint so as to meet the requirement of automobile safety, so that the structural complexity of an automobile body can be improved, the weight of the automobile body is increased, the requirement of the automobile on light weight cannot be met, and meanwhile, the manufacturing cost is also increased.

Disclosure of Invention

The invention solves the problems of complex structure and the like of an automobile rear longitudinal beam assembly in the prior art, and provides an automobile rear longitudinal beam structure, an automobile rear longitudinal beam assembly and an automobile.

In view of the above problems, the rear longitudinal beam structure for the automobile provided by the embodiment of the invention comprises a rear longitudinal beam body, wherein the front end of the rear longitudinal beam body is bent to form a bending connecting plate for connecting an automobile threshold, and the bending connecting plate comprises a first side plate, a second side plate and a third side plate; the first side panel and the third side panel are located on opposite sides of the second side panel; one end of the second side plate is connected with the first side plate at a first preset angle, and the other end of the second side plate is connected with the third side plate at a second preset angle; the first side plate is used for connecting the side surface of the door sill of the automobile; the second side plate is used for connecting the top surface of the door sill of the automobile; the third side plate is used for being connected with a threshold flanging of the automobile threshold.

Optionally, longeron structure still includes all the protrusion sets up main muscle and a plurality of muscle of assisting on the back longeron body, main muscle is connected a plurality of assist the muscle, highly being higher than of main muscle assist the height of muscle.

Optionally, a first preset angle between the first side plate and the second side plate is 90 degrees, a second preset angle between the second side plate and the third side plate is 90 degrees, and the bending connection plate is formed byAnd (4) a mold structure.

The invention further provides an automobile rear longitudinal beam assembly which comprises a first cross beam, a second cross beam, a third cross beam, a fourth cross beam, a front longitudinal beam, an anti-collision longitudinal beam and an automobile rear longitudinal beam structure; the first cross beam, the second cross beam, the third cross beam and the fourth cross beam are sequentially connected to the rear longitudinal beam body and are parallel to each other; the front longitudinal beam is parallel to the anti-collision longitudinal beam; the front longitudinal beam is perpendicular to the first cross beam; the front longitudinal beam and the first cross beam are connected to the front end of the rear longitudinal beam body; the anti-collision longitudinal beam and the fourth cross beam are connected to the rear end of the rear longitudinal beam body.

Optionally, a first convex part is convexly arranged on the rear longitudinal beam body; a sixth groove is formed in the first cross beam; the first cross beam is overlapped on the first convex part through the sixth groove;

the rear longitudinal beam body is sunken to form a first groove; a second convex part is arranged on the front longitudinal beam, and the front longitudinal beam is inserted into the first groove through the second convex part;

the first convex part and the first groove are both arranged at the front end of the rear longitudinal beam body; the first cross beam is perpendicular to the automobile doorsill connected to the bending connecting plate, the extension line of the first cross beam is intersected with the extension line of the automobile doorsill, and the intersection point of the extension line of the first cross beam and the extension line of the automobile doorsill is positioned at the front end of the rear longitudinal beam body; the front longitudinal beam is parallel to the automobile threshold.

Optionally, a third convex part is arranged on the second cross beam; a second groove is formed in the rear longitudinal beam body in a recessed mode; the second cross beam is inserted into the second groove through the third convex part.

Optionally, the automobile rear longitudinal beam assembly further comprises a connecting plate; a fourth convex part is arranged on the third cross beam; the first side plate is bent to form a third groove; the fourth convex part is fixedly connected in the third groove through the connecting plate.

Optionally, a first installation part for installing a damping spring is further arranged on the rear longitudinal beam body, and the first installation part is located at the intersection of the extension line of the third cross beam and the rear longitudinal beam body.

Optionally, a fifth convex part is arranged on the fourth beam; a fourth groove is formed in the rear longitudinal beam body in a recessed mode; the fourth cross beam is inserted into the fourth groove through the fifth convex part;

a sixth convex part is arranged on the anti-collision longitudinal beam; a fifth groove is formed in the rear longitudinal beam body in a recessed mode; the anti-collision longitudinal beam is inserted into the fifth groove through the sixth convex part;

the fourth groove and the fifth groove are both arranged at the rear end of the rear longitudinal beam body; the extension line of the anti-collision longitudinal beam is intersected with the extension line of the fourth cross beam, and the intersection point of the extension line of the anti-collision longitudinal beam and the extension line of the fourth cross beam is located at the rear end of the rear longitudinal beam body.

Optionally, the rear end of the rear longitudinal beam body is further provided with a second mounting portion for mounting an automobile auxiliary frame.

The embodiment of the invention also provides an automobile, which comprises an automobile threshold and the automobile rear longitudinal beam assembly; the automobile doorsill comprises a doorsill top surface, a doorsill side surface and a doorsill flanging arranged on the doorsill top surface, and the doorsill side surface is connected with the doorsill top surface;

the first side plate is connected with the side surface of the threshold; the second side plate is connected with the top surface of the threshold; the third side plate is connected with the threshold flanging.

According to the invention, a bending connecting plate for connecting an automobile threshold is formed by bending a rear longitudinal beam body, and the bending connecting plate comprises a first side plate, a second side plate and a third side plate; the first side plate is connected with the side face of the doorsill, the second side plate is connected with the top face of the doorsill, and the third side plate is connected with the third side face, so that the bending connecting plate is tightly connected with three faces (the top face of the doorsill, the side face of the doorsill and the flanging of the doorsill) of the automobile doorsill, and the rear end of the automobile doorsill is guaranteed to have excellent performance and good rear collision performance; the automobile rear longitudinal beam structure can be connected with the automobile threshold through the bending connecting plate formed by bending the rear longitudinal beam body, additional connecting pieces are not needed, the weight and the structural complexity of the automobile rear longitudinal beam structure are reduced, and the lightweight design of an automobile is facilitated; in addition, this back longeron body is solitary structure, so, has avoided realizing being connected with automobile threshold through a plurality of structure welding, should back longeron body simple structure, and the welding precision that has avoided automobile back longeron structure to cause when by a plurality of structure welding is not high, has improved the rigidity and the intensity of this automobile back longeron structure.

Drawings

The invention is further illustrated with reference to the following figures and examples.

Fig. 1 is a schematic structural view of an automobile rear longitudinal beam assembly according to an embodiment of the present invention;

fig. 2 is a schematic perspective view of a rear longitudinal beam body according to an embodiment of the present invention;

FIG. 3 is a schematic structural view of a first cross member of a rear side rail assembly of an automobile according to an embodiment of the present invention;

FIG. 4 is a schematic structural view of a second cross member of the rear side rail assembly of the vehicle according to an embodiment of the present invention;

FIG. 5 is a schematic structural view of a third cross member of the rear side rail assembly of the vehicle according to an embodiment of the present invention;

FIG. 6 is a schematic structural diagram of a fourth cross member of the rear side rail assembly of the automobile according to an embodiment of the present invention;

FIG. 7 is a schematic structural view of an impact beam of a rear side rail assembly of an automobile according to an embodiment of the present invention;

fig. 8 is a schematic structural view of a rear longitudinal beam upper sealing plate of an automobile rear longitudinal beam assembly according to an embodiment of the present invention;

fig. 9 is a schematic structural view illustrating the rear side rail upper sealing plate mounted on the rear side rail body according to an embodiment of the present invention;

FIG. 10 is a partial structural view of an automobile threshold and a first cross member mounted to a rear rail body in accordance with an embodiment of the present invention;

FIG. 11 is a partial structural view of an automotive rocker mounted to a rear rail body in accordance with one embodiment of the present invention;

fig. 12 is a partial structural schematic view of a third cross member, a fourth cross member and an anti-collision longitudinal beam mounted on a rear longitudinal beam body according to an embodiment of the invention;

fig. 13 is a partial structural schematic view of the third cross member, the fourth cross member and the anti-collision longitudinal beam which are mounted on the rear longitudinal beam body according to the embodiment of the invention.

The reference numerals in the specification are as follows:

1. a rear longitudinal beam assembly; 11. a rear longitudinal beam structure; 111. a rear longitudinal beam body; 11101. bending the connecting plate; 111011 and a first side plate; 111012, a second side panel; 111013, a third side panel; 11102. a main rib; 11103. auxiliary ribs; 11104. a first convex portion; 11105. a first groove; 11106. a second groove; 11107. a third groove; 11108. a fourth groove; 11109. a fifth groove; 11110. a first mounting portion; 11111. a second mounting portion;

12. an upper sealing plate of the rear longitudinal beam; 13. a first cross member; 131. a sixth groove; 14. a second cross member; 141. a third convex portion; 15. a third cross member; 151. a fourth convex portion; 16. a fourth cross member; 161. a fifth convex portion; 17. a front longitudinal beam; 171. a second convex portion; 18. an anti-collision longitudinal beam; 181. a sixth convex portion; 19. a connecting plate; 2. an automobile threshold; 21. a top surface of the threshold; 22. flanging the threshold; 23. the side of the threshold.

Detailed Description

In order to make the technical problems, technical solutions and advantageous effects solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

It is to be understood that the terms "upper", "lower", "left", "right", "front", "rear", "middle", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, should not be construed as limiting the present invention.

For convenience in explaining the structure of the rear longitudinal beam of the automobile and the installation relationship of each structural member, the X direction referred to in the invention is the front-rear direction of the automobile (i.e. the left-right direction in fig. 1), and the Y direction referred to in the invention is the left-right direction of the automobile (i.e. the up-down direction in fig. 1); the Z direction referred to in the present invention is the up-down direction of the automobile (i.e., the front-back direction in fig. 1, and the direction perpendicular to both the X direction and the Y direction in fig. 1).

As shown in fig. 1, 10 and 11, an automobile rear side member according to an embodiment of the present invention includes a rear side member body 111, a front end of the rear side member body 111 is bent to form a bending connection plate 11101 for connecting an automobile threshold 2, and the bending connection plate 11101 includes a first side plate 111011, a second side plate 111012 and a third side plate 111013; the first side panel 111011 and the third side panel 111013 are located on opposite sides of the second side panel 111012; one end of the second side plate 111012 is connected to the first side plate 111011 at a first predetermined angle, and the other end of the second side plate 111012 is connected to the third side plate 111013 at a second predetermined angle; (ii) a The first side plate 111011 is used for connecting the side surface of the automobile door sill 2; the second side panel 111012 is used for connecting the top surface of the automobile door sill 2; the third side panel 111013 is used for connecting a threshold flange of the automobile threshold 2.

It can be understood that the shape of the bending connecting plate 11101 corresponds to the shape of the automobile doorsill 2, and the automobile doorsill 2 comprises a doorsill top surface 21, and a doorsill flange 22 and a doorsill side surface 23 which are connected to the doorsill top surface 21; the first side plate 111011 is connected to the threshold side surface 23; the second side panel 111012 is connectedThe sill top face 21; the third side panel 111013 is connected to the threshold flange 22. Thereby realized automobile threshold 2 with bend the three face of connecting plate 11101 be close connection, as preferred, first predetermined angle between first side board 111011 with second side board 111012 is 90 degrees, second predetermined angle between second side board 111012 with third side board 111013 is 90 degrees, promptly the connecting plate 11101 of bending is forAnd (4) a mold structure.

Specifically, as shown in fig. 10 and 11, the first side plate 111011 and the rocker side surface 23 and the second side plate 111012 and the rocker top surface 21 are connected by self-tapping screws; the third side panel 111013 is connected to the threshold bracket 22 by bolts.

In the invention, the rear longitudinal beam body 111 is bent to form a bending connecting plate 11101 for connecting an automobile threshold 2, and the bending connecting plate 11101 comprises a first side plate 111011, a second side plate 111012 and a third side plate 111013; the first side plate 111011 is connected with the doorsill side surface 23, the second side plate 111012 is connected with the doorsill top surface 21, and the third side plate 111013 is connected with the third side surface, so that the bending connecting plate 11101 is tightly connected with three surfaces (the doorsill top surface 21, the doorsill side surface 23 and the doorsill flange 22) of the automobile doorsill 2, and the excellent performance and the good rear collision performance of the connection part of the automobile doorsill 2 and the rear longitudinal beam body 111 (namely the rear end of the automobile doorsill 2) are ensured; in addition, the connection between the automobile rear longitudinal beam structure 1 and the automobile threshold 2 can be realized through the bending connection plate 11101 formed by bending the rear longitudinal beam body 111 per se, additional connecting pieces are not needed, the weight and the structural complexity of the automobile rear longitudinal beam structure 11 are further reduced, and the lightweight design of an automobile is facilitated; in addition, this back longeron body 111 is solitary structure, so, has avoided realizing being connected with automobile threshold 2 through a plurality of structure welding, should back longeron body 111 simple structure, and has avoided automobile back longeron structure 11 to cause its welding precision not high when having avoided the welding of a plurality of structure, has improved this automobile back longeron structure 11's rigidity and intensity.

In an embodiment, as shown in fig. 2, the automobile rear side member structure 11 further includes a main rib 11102 and a plurality of auxiliary ribs 11103 both protruding from the rear side member body 111, the main rib 11102 connects the plurality of auxiliary ribs 11103, and the main rib 11102 is higher than the auxiliary ribs 11103. As can be understood, the main bead 11102 is disposed in the X direction of the rear side member body 111, and the auxiliary bead 11103 is disposed in the Y direction of the rear side member body 111; when the automobile collides in the X direction (namely the front and rear direction), the main rib 11102 can transmit the collision force received by the automobile to the bottom plate of the automobile, so that the damage degree of the automobile when the automobile is collided is reduced, and the safety of the automobile is improved.

In one embodiment, as shown in fig. 8 and 9, the automobile rear side member structure 11 further includes a rear side member upper closing plate 12 connected to the rear side member body 111; the rear longitudinal beam body 111 is an aluminum structural member; the rear longitudinal beam upper sealing plate 12 is a steel structural member. It can be understood that the rear side member upper closing plate 12 and the rear side member body 111 form a closed box type structure, thereby improving the rigidity and strength of the automobile rear side member structure 11. In addition, due to the design of the rear longitudinal beam upper sealing plate 12 of the steel structural member, the connection between other structural members of the automobile body and the rear longitudinal beam upper sealing plate 12 is facilitated, and the other structural members of the automobile body can be directly welded with the rear longitudinal beam upper sealing plate 12; in the invention, the rear longitudinal beam body 111 is an aluminum structural member, the rear longitudinal beam upper sealing plate 12 is a steel structural member, that is, the automobile rear longitudinal beam structure 11 forms a structural member with upper steel and lower aluminum, so that the automobile body weight is reduced, the corrosion resistance of the automobile is improved, and the automobile rear longitudinal beam is convenient to connect with other structural members.

As shown in fig. 1, an embodiment of the present invention further provides an automobile rear side member assembly 1, which includes a first cross member 13, a second cross member 14, a third cross member 15, a fourth cross member 16, a front side member 17, an anti-collision side member 18, and the automobile rear side member structure 11 according to any one of claims 1 to 3; the first cross beam 13, the second cross beam 14, the third cross beam 15 and the fourth cross beam 16 are sequentially connected to the rear longitudinal beam body 111 and are parallel to each other; the front longitudinal beam 17 is parallel to the crash longitudinal beam 18; the front longitudinal beam 17 is perpendicular to the first cross beam 13; the front side member 17 and the first cross member 13 are connected to the front end of the rear side member body 111; the impact side member 18 and the fourth cross member 16 are connected to the rear end of the rear side member body 111. It can be understood that the first cross member 13, the second cross member 14, the third cross member 15 and the fourth cross member 16 are all connected in the Y direction of the rear side member body 111, the front side member 17 is connected at the front end of the rear side member body 111 in the X direction, the impact side member 18 is connected at the rear end of the rear side member body 111 in the X direction, and the vehicle body can be directly mounted on the vehicle rear side member assembly 1, so that the vehicle rear side member assembly 1 has a function of bearing the vehicle body.

Preferably, as shown in fig. 3 to 7, the first cross beam 13, the third cross beam 15, the front longitudinal beam 17 and the impact longitudinal beam 18 are all aluminum alloy extruded structures with sealed cavities; the second beam 14 and the fourth beam 16 both adopt an aluminum alloy stamping structure with a protruding cavity. It can be understood that the first cross member 13, the second cross member 14, the third cross member 15, the fourth cross member 16, the rear side member body 111, the front side member 17 and the impact side member 18 are all structural members made of aluminum materials, so that the weight of the automobile body is greatly reduced, and the automobile rear side member assembly 1 is high in integration, high in precision and low in manufacturing cost while the lightweight design of the vehicle is facilitated.

In an embodiment, as shown in fig. 2, 3 and 10, a first protrusion 11104 is convexly disposed on the rear side member body 111; a sixth groove 131 is formed in the first cross beam 13; the first beam 13 is overlapped on the first convex part 11104 through the sixth groove 131; specifically, the first convex part 11104 is of a zigzag structure, the sixth groove 131 is of a reverse zigzag groove, and after a Z-shaped falling part is adopted in splicing, the sixth groove and the sixth groove are fixedly connected through a self-tapping screw, so that four inner wall surfaces of the sixth groove 131 are all in lap joint with the first convex part 11104, force transmission performance between the first cross beam 13 and the rear longitudinal beam body 111 is enhanced, strength and rigidity of the automobile rear longitudinal beam structure 11 are enhanced, and safety of an automobile is improved.

As shown in fig. 2, a first groove 11105 is formed on the rear longitudinal beam body 111 in a recessed manner; the front longitudinal beam 17 is provided with a second convex part 171, and the front longitudinal beam 17 is inserted into the first groove 11105 through the second convex part 171; it can be understood that the first groove 11105 is a U-shaped structure disposed at the front end of the rear longitudinal beam body 111, and the front longitudinal beam 17 has a second protrusion 171, and the second protrusion 171 is inserted behind the first groove 11105 and then fixedly connected by a self-tapping screw. In addition, the first cross beam 13, the automobile threshold 2 and the front longitudinal beam 17 are connected to the front end of the rear longitudinal beam body 111, so that the rigidity and the collision force transmission of the automobile rear longitudinal beam structure 11 are enhanced, and the safety of an automobile is further enhanced.

The first convex part 11104 and the first concave groove 11105 are both arranged at the front end of the rear longitudinal beam body 111; the first cross beam 13 is perpendicular to the automobile doorsill 2 connected to the bending connecting plate 11101, the extension line of the first cross beam 13 is intersected with the extension line of the automobile doorsill 2, and the intersection point of the extension line of the first cross beam 13 and the extension line of the automobile doorsill 2 is positioned at the front end of the rear longitudinal beam body 111; the front longitudinal beam 17 is parallel to the vehicle threshold 2. It can be understood that the front longitudinal beam 17 and the automobile threshold 2 are connected to the X direction of the rear longitudinal beam body 111, the first cross beam 13 is connected to the Y direction of the rear longitudinal beam body 111, the extension line of the first cross beam 13 intersects with the extension line of the automobile threshold 2, and the intersection point of the extension line of the first cross beam 13 and the extension line of the automobile threshold 2 is located at the front end of the rear longitudinal beam body 111, so that a first three-way head structure is formed at the front end of the rear longitudinal beam body 111, a strong rigidity joint is formed at the position of the first three-way head, and the safety of an automobile is improved.

In one embodiment, as shown in fig. 2 and 4, a third protrusion 141 is provided on the second beam 14; a second groove 11106 is formed on the rear longitudinal beam body 111 in a recessed manner; the second beam 14 is inserted into the second groove 11106 through the third protrusion 141. It can be understood that the second beam 14 has a third protrusion 141 inserted into the second groove 11106; further, the second groove 11106 is a U-shaped structure extending towards the Y direction of the rear longitudinal beam body 111, and the design of the second groove 11106 realizes tight connection of the second cross beam 14, thereby ensuring the lap joint strength of the second cross beam 14.

In one embodiment, as shown in fig. 2 and 12, the automobile rear side member assembly 1 further includes a connecting plate 19; a fourth convex part 151 is arranged on the third beam 15; the first side plate 111011 is bent to form a third groove 11107; the fourth protrusion 151 is fixedly connected in the third groove 11107 through the connecting plate 19. It can be understood that the connecting plate 19 is a connecting plate 19 bent into a "U" shape, and after the connecting plate 19 is fixed in the third groove 11107, the third beam 15 is fixedly connected to the connecting plate 19 by a self-tapping screw, so that the connecting mode can maximally improve the torsion resistance of the third beam 15, and improve the torsion rigidity of the third beam 15.

In an embodiment, as shown in fig. 2 and 13, a first mounting portion 11110 for mounting a shock absorbing spring (not shown) is further disposed on the rear side member body 111, and the first mounting portion 11110 is located at a junction between an extension line of the third cross member 15 and the rear side member body 111 (i.e., at the first three-way end of the rear side member body 111). As can be understood, the first mounting portion 11110 is located on the bottom surface of the rear side member body 111, the second mounting portion 11111 is convexly arranged on the rear side member body 111 and is cylindrical, and the damping spring is sleeved on the second mounting portion 11111; the strength and the rigidity of the rear longitudinal beam body 111 are higher, so that the stability of the automobile spring is improved, and the safety of an automobile is further improved.

Preferably, the top surface of the rear side member body 111 is further provided with a plurality of first ribs connecting the second mounting portion 11111, and the first ribs are radially distributed on the rear side member body 111 with the second mounting portion 11111 as a center. The rigidity and the strength of the first installation part 11110 are further enhanced by the design of the first reinforcing ribs, and the stability of the damping spring installed on the first installation part 11110 is guaranteed.

In an embodiment, as shown in fig. 2, 6 and 12, the fourth beam 16 is provided with a fifth convex portion 161; a fourth groove 11108 is formed on the rear longitudinal beam body 111 in a recessed manner; the fourth beam 16 is inserted into the fourth groove 11108 through the fifth protrusion 161; it can be understood that the fourth groove 11108 is a U-shaped structure extending towards the Y direction of the rear longitudinal beam body 111, and the design of the fourth groove 11108 realizes tight connection of the fourth cross beam 16, thereby ensuring the insertion strength of the fourth cross beam 16.

As shown in fig. 2, 7 and 12, a sixth convex portion 181 is provided on the longitudinal crash rail 18; a fifth groove 11109 is formed in the rear longitudinal beam body 111 in a recessed manner; the longitudinal collision prevention beam 18 is inserted into the fifth groove 11109 through the sixth protrusion 181; it can be understood that the fifth groove 11109 is also in a U-shaped structure, and the sixth protrusion 181 is inserted into the fifth groove 11109 and then fixedly connected by a self-tapping screw.

The fourth groove 11108 and the fifth groove 11109 are both arranged at the rear end of the rear longitudinal beam body 111; an extension line of the longitudinal collision beam 18 intersects with an extension line of the fourth cross beam 16, and an intersection point of the extension line of the longitudinal collision beam 18 and the extension line of the fourth cross beam 16 is located at the rear end of the rear longitudinal beam body 111. It can be understood that the fourth cross beam 16 is connected to the X direction of the rear side member body 111, the fourth cross beam 16 is connected to the Y direction of the rear side member body 111, and the intersection point of the extension line of the anti-collision side member 18 and the extension line of the fourth cross beam 16 is located at the rear end of the rear side member body 111, so that a second three-way head is formed at the rear end of the rear side member body 111, a strong rigidity joint is formed at the position of the second three-way head, and the safety of an automobile is improved.

Preferably, the front longitudinal beam 17 body is a cast aluminum structural member, so that in the process of manufacturing the front longitudinal beam 17 body, the problem of utilization rate of stamping materials is not required to be considered, force transmission channels are formed by tightly connecting the rear longitudinal beam body 111 made of aluminum materials with the first cross beam 13, the second cross beam 14, the third cross beam 15, the fourth cross beam 16, the front longitudinal beam 17 and the anti-collision longitudinal beam 18, and the automobile rear longitudinal beam assembly 1 can ensure that an automobile rear floor has higher rigidity and strength, can better resist torsion of an automobile body, and has better manufacturability.

In one embodiment, as shown in fig. 12, the rear end of the rear side member body 111 is further provided with a second mounting portion 11111 for mounting a sub frame (not shown) of a vehicle. It is to be understood that the second mounting portion 11111 is also located at the intersection of the fourth cross member 16 and the impact side member 18 at the rear side member body 111 (i.e., at the above-mentioned first triple junction of the rear side member body 111). Specifically, the second mounting portion 11111 is a threaded column with internal threads, which protrudes upward from the top surface of the rear side member body 111 and is screwed with the subframe of the vehicle; preferably, the threaded column is connected to a plurality of second reinforcing ribs, and the second reinforcing ribs are radially distributed on the rear side member body 111 with the threaded column as a center. The strength and the rigidity of the rear longitudinal beam body 111 are higher, so that the stability of the auxiliary frame of the automobile is improved, and the safety of the automobile is further improved.

As shown in fig. 1, 10 and 11, in one embodiment of the present invention, an automobile is further provided, which includes an automobile threshold 2 and the automobile rear side member assembly 1; the automobile door sill 2 comprises a door sill top surface 21, a door sill side surface 23 and a door sill flanging 22 arranged on the door sill top surface 21, wherein the door sill side surface 23 is connected with the door sill top surface 21;

the first side plate 111011 is connected to the threshold side surface 23; the second side panel 111012 is connected to the sill top face 21; the third side panel 111013 is connected to the threshold flange 22.

In the invention, the rear longitudinal beam body 111 is bent to form a bending connecting plate 11101 for connecting an automobile threshold 2, and the bending connecting plate 11101 comprises a first side plate 111011, a second side plate 111012 and a third side plate 111013; the first side plate 111011 is connected with the doorsill side surface 23, the second side plate 111012 is connected with the doorsill top surface 21, and the third side plate 111013 is connected with the third side surface, so that the bending connecting plate 11101 is tightly connected with three surfaces (the doorsill top surface 21, the doorsill side surface 23 and the doorsill flange 22) of the automobile doorsill 2, and the excellent performance and the good rear collision performance of the connection part of the automobile doorsill 2 and the rear longitudinal beam body 111 (namely the rear end of the automobile doorsill 2) are ensured; in addition, the connection between the automobile rear longitudinal beam structure 1 and the automobile threshold 2 can be realized through the bending connection plate 11101 formed by bending the rear longitudinal beam body 111 per se, additional connecting pieces are not needed, the weight and the structural complexity of the automobile rear longitudinal beam structure 11 are further reduced, and the lightweight design of an automobile is facilitated; in addition, this back longeron body 111 is solitary structure, so, has avoided realizing being connected with automobile threshold 2 through a plurality of structure welding, should back longeron body 111 simple structure, and has avoided automobile back longeron structure 11 to cause its welding precision not high when having avoided the welding of a plurality of structure, has improved this automobile back longeron structure 11's rigidity and intensity.

The present invention is not limited to the above preferred embodiments, and any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention.