阅读说明：本技术 一种汽车纵梁 (Automobile longitudinal beam ) 是由 曾子聪 范松 郑颢 刘衡 于 2019-10-08 设计创作，主要内容包括：本发明涉及汽车的技术领域,公开了一种汽车纵梁,纵梁外板的凹陷段区域在碰撞过程中能朝纵梁内板稳定折弯,形成第一折点,加强件的前端部区域形成第二折点,而纵梁外板的后段形成稳定折弯的第三折点,在汽车发生正面碰撞时,碰撞的能量沿着纵梁的长度方向传递,在三个折点处相继发生稳定折弯形成三折点四段折弯效果,可以有效降低整车B柱下端加速度峰值以及防护墙的侵入量,减轻对乘员的伤害,而且,通过灵活调整凹陷段、后段以及加强件的布置位置,使得该纵梁在不同车型上可以实现共用,有利于缩短开发周期,降低开发成本。(The invention relates to the technical field of automobiles, and discloses an automobile longitudinal beam, wherein a sunken section area of a longitudinal beam outer plate can be stably bent towards a longitudinal beam inner plate in a collision process to form a first folding point, a front end area of a reinforcing piece forms a second folding point, a rear section of the longitudinal beam outer plate forms a third folding point which is stably bent, when an automobile is subjected to frontal collision, collision energy is transmitted along the length direction of the longitudinal beam, and three folding points and four-section bending effects are formed by sequentially and stably bending the three folding points, so that the acceleration peak value of the lower end of a B column of the whole automobile and the intrusion amount of a protective wall can be effectively reduced, the injury to passengers is reduced, and the longitudinal beam can be shared on different automobile types by flexibly adjusting the arrangement positions of the sunken section, the rear section and the reinforcing piece, the development period can be favorably shortened, and the development cost can be reduced.)

1. The utility model provides an automobile longitudinal beam, its characterized in that, includes longeron inner panel and longeron planking, the longeron inner panel with the longeron planking is connected and is formed a cavity between the two, the longeron planking is including anterior segment, middle section and the back end that connects gradually, the anterior segment with be equipped with between the middle section and be close to gradually the depressed part of longeron inner panel, the back end is kept away from gradually the longeron inner panel sets up, be equipped with the reinforcement on the longeron inner panel, the preceding tip of reinforcement is located the region that the middle section corresponds.

2. The vehicle rail of claim 1 wherein the rear section is flared outwardly on both sides.

3. The automobile side member of claim 2, wherein the outer side surface of the side member outer panel is provided with a first guide groove arranged along the longitudinal direction of the side member outer panel.

4. The vehicle rail of claim 3, wherein the first guide slot extends from the recessed section to the rear section.

5. The automobile side member according to claim 3, wherein the outer side face of the side member inner panel is provided with a second guide groove extending in the width direction of the side member inner panel, and the second guide groove is provided near the front end portion of the reinforcement.

6. The automobile side rail of claim 5, wherein the outer side surface of the side rail inner plate is further provided with a third guide groove extending along the length direction of the side rail inner plate and intersecting the second guide groove.

7. The automobile longitudinal beam of any one of claims 1 to 6, wherein an inner panel reinforcement plate is provided on an inner side surface of the longitudinal beam inner panel, a front end portion of the reinforcement is connected to the inner panel reinforcement plate, and a rear end portion of the reinforcement is connected to the longitudinal beam inner panel.

8. The automobile longitudinal beam of claim 7, wherein the inner plate of the longitudinal beam is configured as a semi-enclosed cavity structure having a side wall and a first connecting wall and a second connecting wall disposed on two sides of the side wall, the inner plate reinforcing plate comprises a plate body, the plate body is welded to the side wall, two sides of the plate body are provided with a first connecting edge and a second connecting edge respectively welded to the first connecting wall and the second connecting wall, a front end of the reinforcing member is connected to a rear end of the second connecting edge, and a rear end of the reinforcing member is connected to the second connecting wall.

9. The automobile rail of claim 7, wherein an inner side surface of the rail outer panel is provided with an outer panel reinforcement panel extending to the recessed section to a front end portion of the reinforcement.

10. The vehicle rail of claim 8 wherein said reinforcement member is provided with a first connection to said side wall and a second connection to said rail outer panel.

Technical Field

The invention relates to the technical field of automobiles, in particular to an automobile longitudinal beam.

Background

The longitudinal beam plays an important role in bearing and transmitting power on the automobile. The longitudinal beam is equivalent to a framework of the automobile, and absorbs collision energy through crushing deformation and bending deformation when the automobile has a frontal collision accident.

The longitudinal beam is generally formed by welding a longitudinal beam inner plate and a longitudinal beam outer plate, when receiving high-speed collision energy, the deformation direction and the deformation degree of each position on the longitudinal beam are unstable, the longitudinal beam can be bent towards the longitudinal beam inner plate side and the longitudinal beam outer plate side, and the bending degree is random, so that during a frontal high-speed collision, the longitudinal beam has a plurality of uncertain deformation modes, the longitudinal beam deformation mode is unstable, the acceleration peak value of the lower end of a B column of the whole vehicle is increased, the intrusion amount of a protective wall is increased, and further the injury to passengers is increased. In addition, due to the fact that the longitudinal beam deformation mode is unstable, longitudinal beams of different vehicle types cannot be shared, different longitudinal beam deformation modes need to be developed for different vehicle types, the development period is not shortened, and the development cost is reduced.

Disclosure of Invention

The technical problem to be solved by the invention is as follows: the existing longitudinal beam is unstable in deformation mode, so that the acceleration peak value of the lower end of a B column of the whole vehicle is increased, the invasion amount of a protective wall is increased, the damage to passengers is large, and the longitudinal beams of different vehicle types cannot be shared, so that the development period is not shortened, and the development cost is reduced.

In order to solve the technical problem, the invention provides an automobile longitudinal beam which comprises a longitudinal beam inner plate and a longitudinal beam outer plate, wherein the longitudinal beam inner plate is connected with the longitudinal beam outer plate, a cavity is formed between the longitudinal beam inner plate and the longitudinal beam outer plate, the longitudinal beam outer plate comprises a front section, a middle section and a rear section which are sequentially connected, a sunken section which is gradually close to the longitudinal beam inner plate is arranged between the front section and the middle section, the rear section is gradually far away from the longitudinal beam inner plate, a reinforcing piece is arranged on the longitudinal beam inner plate, and the front end part of the reinforcing piece is located in a region corresponding to.

Further preferably, both sides of the rear section are outwardly flared.

Further preferably, the outer side surface of the side member outer panel is provided with a first guide groove arranged along the longitudinal direction of the side member outer panel.

Further preferably, the first guide groove extends from the recessed section to the rear section.

Further preferably, the outer side surface of the longitudinal beam inner plate is provided with a second guide groove, the second guide groove extends along the width direction of the longitudinal beam inner plate, and the second guide groove is close to the front end part of the reinforcement.

Further preferably, the outer side surface of the longitudinal beam inner plate is further provided with a third guide groove, and the third guide groove extends along the longitudinal beam inner plate in the length direction and intersects with the second guide groove.

Further preferably, an inner plate reinforcing plate is arranged on the inner side face of the longitudinal beam inner plate, the front end portion of the reinforcing member is connected with the inner plate reinforcing plate, and the rear end portion of the reinforcing member is connected with the longitudinal beam inner plate.

Further preferably, the longeron inner panel sets up to the cavity structure that partly surrounds, and it has a lateral wall and locates the first connecting wall and the second connecting wall of lateral wall both sides, the inner panel reinforcing plate package rubbing board body, the plate body with the welding of lateral wall laminating, the both sides of plate body be equipped with respectively with first connecting wall and the first connecting edge of second connecting wall laminating welded and second connecting edge, the preceding tip of reinforcement with the rear end on second connecting edge is connected, the back tip of reinforcement with the second connecting wall is connected.

Further preferably, an outer plate reinforcing plate is arranged on the inner side face of the outer plate of the longitudinal beam, and the outer plate reinforcing plate extends to the front end part of the reinforcing piece from the sunken section.

Further preferably, the reinforcement is provided with a first connecting portion connected to the side wall and a second connecting portion connected to the side member outer panel.

Compared with the prior art, the automobile longitudinal beam has the beneficial effects that:

according to the automobile longitudinal beam provided by the embodiment of the invention, as the sunken section is gradually close to the longitudinal beam inner plate, the cross section area of the whole longitudinal beam is reduced, and the rigidity is suddenly changed, so that the sunken section area can be stably bent towards the longitudinal beam inner plate in the collision process to form a first break point, the reinforcing member is arranged on the longitudinal beam inner plate, the rigidity of the area covered by the reinforcing member is higher, the rigidity of the front end part uncovered by the reinforcing member is relatively lower, so that the stable bending is generated in the front end part area of the reinforcing member to form a second break point, the rear section of the longitudinal beam outer plate is gradually far away from the longitudinal beam inner plate, the cross section area of the whole longitudinal beam at the rear section is increased, the bearing capacity is improved, the rigidity is suddenly changed to form a third break point which is stably bent, when an automobile is in frontal collision, the collision energy is transmitted along the length direction of the longitudinal beam, can effectively reduce the intrusion of whole car B post lower extreme acceleration peak value and protecting wall, alleviate the injury to the passenger, moreover, through the arrangement position of nimble adjustment depressed section, back end and reinforcement for this longeron can realize the sharing on different motorcycle types, is favorable to shortening development cycle, reduces development cost.

Drawings

FIG. 1 is a schematic structural view of an automotive longitudinal beam in accordance with an embodiment of the present invention;

FIG. 2 is a schematic structural view of another perspective of an automotive rail according to an embodiment of the present invention;

FIG. 3 is a schematic structural view from another perspective of an automotive rail according to an embodiment of the present invention;

FIG. 4 is a schematic view of a deformed and bent automobile longitudinal beam according to an embodiment of the invention;

FIG. 5 is an exploded view of an exemplary embodiment of the present invention;

FIG. 6 is a schematic structural view of a rail inner panel of an automotive rail according to an embodiment of the present invention;

fig. 7 is a schematic structural view of a side member outer panel of an automobile side member according to an embodiment of the present invention.

In the figure, 10, a side member inner panel; 20. a stringer outer panel; 30. a reinforcement; 40. an inner panel reinforcement panel; 50. an outer panel reinforcement plate; 101. a side wall; 102. a first connecting wall; 103. a second connecting wall; 104. a second guide groove; 105. a third guide groove; 201. a front section; 202. a middle section; 203. A rear section; 204. a recessed section; 205. a first guide groove; 301. a first connection portion; 302. a second connecting portion; 401. a plate body; 402. a first connecting edge; 403. a second connecting edge.

Detailed Description

The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.

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

As shown in fig. 1 to 7, an automobile longitudinal beam according to a preferred embodiment of the present invention includes a longitudinal beam inner plate 10 and a longitudinal beam outer plate 20, the longitudinal beam inner plate 10 is connected to the longitudinal beam outer plate 20 and forms a cavity therebetween to enhance the strength of the longitudinal beam, generally, the longitudinal beam inner plate 10 is configured as a semi-enclosed cavity structure, the longitudinal beam inner plate 10 and the longitudinal beam outer plate 20 are welded to each other to form the cavity, the longitudinal beam outer plate 20 includes a front section 201, a middle section 202 and a rear section 203 which are connected in sequence, a recessed section 204 which is gradually close to the longitudinal beam inner plate 10 is disposed between the front section 201 and the middle section 202, as the recessed section 204 is close to the longitudinal beam inner plate 10, the cross-sectional area of the longitudinal beam as a whole in the region of the recessed section 204 is reduced, so that the bearing capacity at that part is reduced, during a collision, the recessed section 204 can provide a certain guide for the deformation of the longitudinal beam as, in the area of the rear section 203 of the longitudinal beam, the cross section area of the whole longitudinal beam is increased compared with that of the middle section 202, the bearing capacity of the whole longitudinal beam is improved, so that the rigidity of the joint of the middle section 202 and the rear section 203 is changed, the whole longitudinal beam is stably bent at the joint of the middle section 202 and the rear section 203 in the collision process, the reinforcing member 30 is arranged on the inner longitudinal beam plate 10, the front end part of the reinforcing member 30 is located in the area corresponding to the middle section 202, the rigidity of the area covered by the reinforcing member 30 is high, the rigidity of the inner longitudinal beam plate 10 which is not covered by the front end part of the reinforcing member 30 is relatively low, and therefore the front end part of the reinforcing member 30 is also suddenly.

Specifically, since the recessed section 204 is gradually close to the inner side rail panel 10, the cross-sectional area of the entire side rail is reduced, the stiffness is suddenly changed, and the area of the recessed section 204 can be stably bent towards the inner side rail panel 10 during a collision, so as to form the first folding point a, since the reinforcement 30 is disposed on the inner side rail panel 10, the area covered by the reinforcement 30 is relatively rigid, and the front end portion not covered by the reinforcement 30 is relatively less rigid, the stable bending is generated in the front end portion area of the reinforcement 30, so as to form the second folding point B, and the rear section 203 of the outer side rail panel 20 is gradually disposed away from the inner side rail panel 10, so that the cross-sectional area of the entire side rail at the rear section 203 is increased, the bearing capacity is improved, the stiffness is suddenly changed to form the third folding point C for stable bending, and when a frontal collision occurs to an automobile, the energy of the collision is transmitted along the length direction of the side rail, and the stable bending is, the lower end acceleration peak value of the B column of the whole vehicle and the invasion amount of a protective wall can be effectively reduced, the injury to passengers is reduced, and in addition, the arrangement positions of the sunken section 204, the rear section 203 and the reinforcing part 30 are flexibly adjusted, so that the longitudinal beam can be shared on different vehicle types such as cars, SUVs, MPVs and the like, the development period is favorably shortened, and the development cost is reduced.

Further, the outside expansion in both sides of back end 203 sets up, thereby further increase the holistic cross sectional area of back end 203 longeron, improve the bearing capacity of back end 203, it is bigger to make the cross-sectional difference between back end 203 and the middle section 202, it is easier that the longeron takes place to buckle in this position department, the stability that the improvement longeron was bent, correspondingly, in order to match the expanding structure of longeron planking 20 back end 203, the rear end both sides of longeron inner panel 10 also outwards expand the setting, so that guarantee the wholeness of longeron, improve the intensity of longeron.

Generally, in the event of a frontal collision, the impact beam is bent, the energy absorption box is crushed, the front section 201 of the longitudinal beam receives collision energy at the earliest and transmits the collision energy to the recessed section 204, due to the abrupt change of stiffness of the recessed section 204, the front section can deform and bend to buffer a part of the collision energy, when the collision continues or the collision strength is large enough to exceed the bearing capacity of the recessed section 204, the collision energy can continue to be transmitted to the longitudinal beam, in order to better control the transmission direction of the collision energy, in this embodiment, the outer side surface of the outer plate 20 of the longitudinal beam is provided with a first guide groove 205, the first guide groove 205 is arranged along the length direction of the outer plate 20 of the longitudinal beam, preferably, the first guide groove 205 extends from the recessed section 204 to the rear section 203, so that the outer plate 20 of the longitudinal beam is weakened in the area along the first guide groove 205, thereby better guiding the collision energy to be transmitted to the second folding point B, the longitudinal beam can be ensured to be stably bent along three staggered folding points in succession to form a three-folding-point four-section bending effect.

Because the reinforcing member 30 is disposed on the side member inner panel 10, in order to ensure the bending stability of the side member, a second guide groove 104 is disposed on the outer side surface of the side member inner panel 10, the second guide groove 104 extends along the width direction of the side member inner panel 10, and the second guide groove 104 is close to the front end portion of the reinforcing member 30, so as to form a rigidity weakened area at the front end portion of the reinforcing member 30, thereby better guiding the bending deformation of the area, specifically, at the front end portion position of the reinforcing member 30, the rigidity is lower, when a collision occurs, the side member inner panel 10 can be bent toward the side member outer panel 20 along the second guide groove 104, thereby controlling the deformation direction at the second bending point B, and ensuring the bending stability.

Further, the outer side surface of the side member inner panel 10 is further provided with a third guide groove 105, the third guide groove 105 extends along the length direction of the side member inner panel 10 and intersects with the second guide groove 104, and the third guide groove 105 guides the side member inner panel 10 to weaken the rigidity in the area along the third guide groove 105, so that the collision energy can be better guided to be transmitted to the second folding point B and the third folding point C along the third guide groove 105, and the third guide groove 105 intersects with the second guide groove 104 to further weaken the rigidity at the intersection position of the third guide groove 105 and the second guide groove 104, and the stability of the front end part deformation bending of the reinforcement 30 is ensured.

In this embodiment, the inner side surface of the longitudinal beam inner panel 10 is provided with the inner panel reinforcement panel 40, the inner panel reinforcement panel 40 is used for improving the strength of the longitudinal beam inner panel 10, the front end portion of the reinforcement 30 is connected with the inner panel reinforcement panel 40, and the rear end portion of the reinforcement 30 is connected with the longitudinal beam inner panel 10, so that the connection of the reinforcement 30 with the longitudinal beam inner panel 10 and the inner panel reinforcement panel 40 is realized. Further, the longitudinal beam inner plate 10 is configured as a semi-enclosed cavity structure, and has a side wall 101 and a first connecting wall 102 and a second connecting wall 103 which are arranged on two sides of the side wall 101, the inner plate reinforcing plate 40 includes a plate body 401, the plate body 401 is welded to the side wall 101 in an attaching manner, two sides of the plate body 401 are provided with a first connecting edge 402 and a second connecting edge 403 which are welded to the first connecting wall 102 and the second connecting wall 103 in an attaching manner, that is, the inner plate reinforcing plate 40 is fixed to the longitudinal beam inner plate 10 through three-side spot welding, so as to enhance the strength of the longitudinal beam inner plate 10, the front end of the reinforcing member 30 is connected to the rear end of the second connecting edge 403, and the rear end of the reinforcing member 30 is connected to the second. In order to secure the overall strength of the side sill inner panel 10, the inner panel reinforcement panel 40 is provided with grooves corresponding to the second guide groove 104 and the third guide groove 105. Therefore, the inner plate reinforcing plate 40 is tightly attached to the longitudinal beam inner plate 10, and the connection stability between the inner plate reinforcing plate and the longitudinal beam inner plate is ensured.

Further, the outer plate reinforcing plate 50 is arranged on the inner side face of the longitudinal beam outer plate 20, and the outer plate reinforcing plate 50 to the sunken section 204 extend to the front end portion of the reinforcing part 30, so that the strength from the sunken section 204 of the longitudinal beam outer plate 20 to the front end portion of the reinforcing part 30 is enhanced, the longitudinal beam is prevented from being bent in advance in the area from the sunken section 204 to the front end portion of the reinforcing part 30, and the longitudinal beam is guaranteed to be bent stably at three staggered folding points to form a three-folding-point four-section bending effect.

In this embodiment, the reinforcement 30 is further provided with a first connecting portion 301 connected to the side wall 101 and a second connecting portion 302 connected to the outer stringer plate 20, the front end portion of the reinforcement 30 is connected to the rear end of the second connecting edge 403, the rear end portion of the reinforcement 30 is connected to the second connecting wall 103, the first connecting portion 301 is connected to the side wall 101 of the inner stringer plate 10, and the second connecting portion 302 is connected to the outer stringer plate 20, so that the reinforcement 30 is stably connected and structurally strengthened.

In the present embodiment, the side member inner panel 10, the side member outer panel 20, the inner panel reinforcing panel 40, the reinforcement 30, and the outer panel reinforcing panel 50 are preferably connected by spot welding to ensure the structural strength of the side member.

In this embodiment, in order to ensure the stability of the installation of the longitudinal beam, a first avoidance groove is formed in the edge of the joint of the rear section 203 of the longitudinal beam outer plate 20, a second avoidance groove corresponding to the first avoidance groove is formed in the longitudinal beam inner plate 10, and the first avoidance groove and the second avoidance groove are used for avoiding other installation structures.

In summary, the embodiment of the present invention provides an automobile longitudinal beam, wherein the recessed section 204 is gradually close to the inner longitudinal beam panel 10, the cross-sectional area of the whole longitudinal beam is reduced, the stiffness is suddenly changed, so that the region of the recessed section 204 can be stably bent towards the inner longitudinal beam panel 10 during a collision, and a first folding point a is formed, because the reinforcement 30 is arranged on the inner longitudinal beam panel 10, the stiffness of the region covered by the reinforcement 30 is relatively large, and the stiffness of the front end portion uncovered by the reinforcement 30 is relatively small, so that the region of the front end portion of the reinforcement 30 is stably bent, and a second folding point B is formed, and the rear section 203 of the outer longitudinal beam panel 20 is gradually far away from the inner longitudinal beam panel 10, so that the cross-sectional area of the whole longitudinal beam at the rear section 203 is increased, the bearing capacity is improved, the stiffness is suddenly changed to form a stably bent third folding point C, the stable bending of taking place in succession at three break point department forms three break point four sections effect of bending, can effectively reduce the intrusion volume of whole car B post lower extreme acceleration peak value and protecting wall, alleviates the injury to the passenger, moreover, through the arrangement position of nimble adjustment depressed section 204, back end 203 and reinforcement 30 for this longeron can realize the sharing on different motorcycle types, is favorable to shortening development cycle, reduces development cost.

It should be understood that the terms "first", "second", etc. are used herein to describe various information, but the information should not be limited to these terms, which are only used to distinguish one type of information from another. For example, "first" information may also be referred to as "second" information, and similarly, "second" information may also be referred to as "first" information, without departing from the scope of the present invention.

The above is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and substitutions can be made without departing from the technical principle of the present invention, and these modifications and substitutions should also be regarded as the protection scope of the present invention.