Vehicle body deformation decoupling device for coping with working condition of frontal collision

Abstract

The invention discloses a vehicle body deformation decoupling device for coping with the working condition of head-on collision. The vehicle body deformation decoupling device comprises an anti-collision beam, a longitudinal beam, an energy absorption box and a decoupling assembly. The first ends of the energy absorption boxes are vertically connected with the anti-collision beam, and the second ends of the energy absorption boxes are connected with the longitudinal beam; the decoupling assembly comprises a guide block and a supporting part, the guide block is connected with the end of the anti-collision beam, an abutting part is arranged on the inner wall of the guide block, the supporting part is arranged on the energy absorption box and the longitudinal beam, and in the collision process, the abutting part makes contact with the supporting part, so that a triangular structure is formed among the guide block, the supporting part and the longitudinal beam; the energy absorption box and the longitudinal beam are stable and do not deform under the action of the guide blocks and the supporting parts. According to the method, decoupling of structural strength design of the longitudinal beam under the front collision working conditions with different overlapping ratios in the front collision can be achieved, respective optimal deformation models are achieved according to different load directions under the working conditions with various overlapping ratios, and the safety performance of the whole vehicle structure is improved.

Description

Technical Field

[0001] The present invention relates to the field of vehicle technology, and more particularly to a vehicle body deformation decoupling device for coping with frontal collision conditions. Background Art

[0002] Data from the National Bureau of Statistics shows that the number of traffic accidents in my country is on the rise each year, and the death toll from traffic accidents has exceeded 60,000. Approximately 40% of car collisions are head-on collisions. Therefore, during the vehicle development phase, automobile manufacturers design the vehicle body structure accordingly for head-on collision conditions, primarily targeting the following typical head-on collision scenarios: The first scenario involves complete overlap between the colliding vehicle and a rigid barrier, known as a full-width collision; the second scenario involves a 50% overlap between the colliding vehicle and a variable barrier, known as a medium-offset collision; and the third scenario involves a 25% overlap between the colliding vehicle and the rigid barrier, known as a small-offset collision.

[0003] The development of frontal collision conditions requires that the vehicle has sufficient crash resistance to protect the occupants of the vehicle, and also requires the vehicle to have low aggressiveness to reduce damage to the target vehicle.

[0004] Therefore, the present invention proposes a vehicle body deformation decoupling device for coping with frontal collision conditions, rationally optimizing the energy absorption structure, load direction and energy transfer path of the front end of the vehicle, improving the structural crashworthiness of the vehicle, while reducing the aggressiveness of the vehicle, protecting the occupants to the greatest extent and reducing injuries. Summary of the Invention

[0005] An object of the present invention is to provide a new technical solution for a vehicle body deformation decoupling device for coping with frontal collision conditions.

[0006] According to a first aspect of the present invention, there is provided a vehicle body deformation decoupling device for coping with frontal collision conditions, comprising: an anti-collision beam, a longitudinal beam, an energy absorption box, and a decoupling assembly;

[0007] The first end of the energy absorption box is vertically connected to the anti-collision beam, and the second end of the energy absorption box is connected to the longitudinal beam;

[0008] The decoupling assembly includes a guide block and a support portion. The guide block is connected to the end of the anti-collision beam, and an abutment portion is provided on the inner wall of the guide block. The support portion is provided on the energy absorption box and the longitudinal beam. During a collision, the abutment portion contacts the support portion.

[0009] Optionally, the abutting portion includes an impact block and an arc-shaped groove, the impact block is arranged on the inner wall of the guide block, the arc-shaped groove is arranged on the inner side of the impact block, and the arc-shaped groove abuts against the support portion.

[0010] Optionally, the support portion includes a first fixed seat, a second fixed seat, a first connecting rod and a second connecting rod, the first fixed seat is arranged on the inner wall of the energy absorption box, the second fixed seat is arranged on the side wall of the longitudinal beam, the first end of the first connecting rod is rotatably connected to the first fixed seat, and the two ends of the second connecting rod are respectively rotatably connected to the second fixed seat and the second end of the first connecting rod.

[0011] Optionally, the thickness of the first connecting rod is equal to the width of the arc-shaped groove.

[0012] Optionally, the support portion further includes a first fastening bolt;

[0013] The first fixing seat includes a fixing plate, two first fixing blocks and a first fixing hole. The first fixing holes are arranged at both ends of the fixing plate. The two first fixing blocks are arranged at intervals on the fixing plate. The first end of the first connecting rod is rotatably connected to the two first fixing blocks. The first fastening bolt passes through the first fixing hole and is connected to the energy absorption box.

[0014] Optionally, the second fixing seat includes a connecting plate and a second fixing block, the connecting plate has a second fixing hole, a second fastening bolt passes through the second fixing hole to fix the connecting plate on the longitudinal beam, the second fixing block is connected to the connecting plate, and the first end of the second connecting rod is rotatably connected to the second fixing block.

[0015] Optionally, the decoupling assembly further includes a first rotating shaft;

[0016] The second end of the first connecting rod has a first fixed tube, and the second end of the second connecting rod is respectively provided with two first connecting tubes. The first fixed tube is located between the two first connecting tubes, and the first rotating shaft is rotatably connected to the first fixed tube and the first connecting tube respectively.

[0017] Optionally, the decoupling assembly further includes a second rotating shaft and a third rotating shaft;

[0018] The first end of the second connecting rod is respectively provided with two second connecting cylinders; the first fixing block is provided with a first mounting hole, and the second fixing block is provided with a second mounting hole;

[0019] The second rotating shaft passes through the second fixing cylinder and the first mounting hole respectively, and the third rotating shaft passes through the second connecting cylinder and the second mounting hole respectively.

[0020] Optionally, a limiting plate is provided on the outer side walls of the first connecting tube and the second connecting tube.

[0021] The beneficial effects of the present invention are:

[0022] The present invention vertically links the first end of the energy absorption box to the anti-collision beam, connects the second end of the energy absorption box to the longitudinal beam, connects the guide block to the end of the anti-collision beam, and an abutment portion is provided on the inner wall of the guide block, and a support portion is provided on the energy absorption box and the longitudinal beam. When a full-width and mid-offset frontal collision occurs, after the anti-collision beam contacts the barrier, it moves backward as a whole to squeeze the energy absorption box or the front of the longitudinal beam. At this time, the abutment portion contacts the support portion, and the stability of the anti-collision beam and the longitudinal beam can be improved through the action of the abutment portion and the support portion; when a small offset frontal collision occurs, the abutment portion of the guide block first contacts the support portion, so that a triangular structure is formed between the guide block, the support portion and the longitudinal beam, so that the energy absorption box and the longitudinal beam are stable and do not deform under the action of the guide block and the support portion. The present invention can achieve the decoupling of the longitudinal beam structural strength design under different overlap rates in frontal collision conditions, and realize that each overlap rate condition has its own optimal deformation model according to the different load directions, thereby improving the structural safety performance of the entire vehicle.

[0023] Further features and advantages of the present invention will become apparent from the following detailed description of exemplary embodiments of the present invention with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and, together with the description, serve to explain the principles of the invention.

[0025] Figure 1 This is a structural diagram of the vehicle body deformation decoupling device for coping with frontal collision conditions according to the present invention;

[0026] Figure 2 It is a structural diagram of the guide block of the present invention;

[0027] Figure 3 It is a structural diagram of the first fixing seat of the present invention;

[0028] Figure 4 is a structural diagram of the second fixing seat of the present invention;

[0029] Figure 5 is a structural diagram of the first connecting rod of the present invention;

[0030] Figure 6 2 is a structural diagram of the second connecting rod of the present invention.

[0031] The markings in the figure are as follows: 1. Anti-collision beam; 2. Longitudinal beam; 3. Energy absorption box; 4. Decoupling assembly; 41. Guide block; 411. Impact block; 412. Arc groove; 42. First fixed seat; 421. Fixed plate; 422. First fixed block; 423. First fixed hole; 43. Second fixed seat; 431. Connecting plate; 432. Second fixed block; 433. Second fixed hole; 44. First connecting rod; 441. First fixed cylinder; 442. Second fixed cylinder; 45. Second connecting rod; 451. First connecting cylinder; 452. Second connecting cylinder; 5. Limiting plate. DETAILED DESCRIPTION

[0032] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that unless otherwise specifically stated, the relative arrangement of components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present invention.

[0033] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.

[0034] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered part of the specification.

[0035] In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not limiting. Therefore, other examples of the exemplary embodiments may have different values.

[0036] like Figures 1 to 6 As shown, an embodiment of the present invention provides a vehicle body deformation decoupling device for coping with frontal collision conditions, including: an anti-collision beam 1, a longitudinal beam 2, an energy absorption box 3 and a decoupling component 4.

[0037] The first end of the energy absorption box 3 is vertically connected to the anti-collision beam 1, and the second end of the energy absorption box 3 is connected to the longitudinal beam 2;

[0038] The decoupling assembly 4 includes a guide block 41 and a support portion. The guide block 41 is connected to the end of the anti-collision beam 1, and an abutment portion is provided on the inner wall of the guide block 41. The support portion is provided on the energy absorption box 3 and the longitudinal beam 2. During a collision, the abutment portion contacts the support portion.

[0039] When a full-width and center-offset frontal collision occurs, after the anti-collision beam 1 contacts the barrier, it moves backward as a whole to squeeze the energy absorption box 3 or the front part of the longitudinal beam 2. At this time, the abutting part contacts the supporting part. Through the action of the abutting part and the supporting part, the stability of the anti-collision beam 1 and the longitudinal beam 2 can be improved; when a small-offset frontal collision occurs, the abutting part of the guide block 41 contacts the supporting part first, so that a triangular structure is formed between the guide block 41, the supporting part and the longitudinal beam 2, so that the energy absorption box 3 and the longitudinal beam 2 are stable and not deformed under the action of the guide block 41 and the supporting part.

[0040] The present invention vertically links the first end of the energy absorption box 3 to the anti-collision beam 1, connects the second end of the energy absorption box 3 to the longitudinal beam 2, connects the guide block 41 to the end of the anti-collision beam 1, and an abutment portion is provided on the inner wall of the guide block 41, and a support portion is provided on the energy absorption box 3 and the longitudinal beam 2. When a full-width and mid-offset frontal collision occurs, after the anti-collision beam 1 contacts the barrier, it moves backward as a whole to squeeze the energy absorption box 3 or the front of the longitudinal beam 2. At this time, the abutment portion contacts the support portion, and the stability of the anti-collision beam 1 and the longitudinal beam 2 can be improved through the action of the abutment portion and the support portion; when a small-offset frontal collision occurs, the abutment portion of the guide block 41 contacts the support portion first, so that a triangular structure is formed between the guide block 41, the support portion and the longitudinal beam 2, so that the energy absorption box 3 and the longitudinal beam 2 are stable and not deformed under the action of the guide block 41 and the support portion. The present invention can achieve decoupling of the structural strength design of the longitudinal beam 2 under head-on collision conditions with different overlap rates, realize respective optimal deformation models for various overlap rate conditions according to different load directions, and improve the structural safety performance of the entire vehicle.

[0041] In one embodiment of the vehicle body deformation decoupling device for coping with frontal collision conditions of the present invention, Figure 1 and Figure 2 As shown, the abutting portion includes an impact block 411 and an arcuate groove 412 . The impact block 411 is provided on the inner wall of the guide block 41 , and the arcuate groove 412 is provided on the inner side of the impact block 411 . The arcuate groove 412 abuts against the support portion.

[0042] The present invention arranges the impact block 411 on the inner wall of the guide block 41, and arranges the arc groove 412 on the inner side of the impact block 411, and the arc groove 412 abuts against the support part, and then limits the support part through the inner arc groove 412 of the impact block 411, so that the guide block 41 and the support part can enhance the structural strength of the anti-collision beam 1 and the longitudinal beam 2, thereby improving the structural safety performance of the entire vehicle.

[0043] In one embodiment of the vehicle body deformation decoupling device for coping with frontal collision conditions of the present invention, Figures 1 to 6As shown, the support portion includes a first fixed seat 42, a second fixed seat 43, a first connecting rod 44 and a second connecting rod 45. The first fixed seat 42 is arranged on the inner wall of the energy absorption box 3, and the second fixed seat 43 is arranged on the side wall of the longitudinal beam 2. The first end of the first connecting rod 44 is rotatably connected to the first fixed seat 42, and the two ends of the second connecting rod 45 are rotatably connected to the second fixed seat 43 and the second end of the first connecting rod 44 respectively.

[0044] Specifically, a triangular structure is formed between the first connecting rod 44 , the second connecting rod 45 , the longitudinal beam 2 and the energy absorption box 3 .

[0045] Definitions of the directions mentioned below: The vehicle length direction is the x-axis direction, which is positive from front to back; the vehicle width direction is the y-axis direction, which is positive from the driver's side to the co-driver's side; the vehicle height direction is the z-axis direction, which is positive from bottom to top.

[0046] When a full-width and center-offset frontal collision occurs, after the anti-collision beam 1 contacts the barrier, it moves backward as a whole to squeeze the energy absorption box 3 or the front part of the longitudinal beam 2. Since the first connecting rod 44 and the second connecting rod 45 are rotationally connected, the deformation of the longitudinal beam 2 will not be affected by the support part; and the middle area between the first connecting rod 44 and the second connecting rod 45 can be crushed or bent due to the axial load and the rotation of the first connecting rod 44 and the second connecting rod 45, thereby achieving the target deformation of the longitudinal beam 2, which can improve the stability of the anti-collision beam 1 and the longitudinal beam 2.

[0047] When a small offset frontal collision occurs, the abutment portion of the guide block 41 first contacts the first connecting rod 44. Since a triangular structure is formed between the first connecting rod 44, the second connecting rod 45 and the longitudinal beam 2, the load is transmitted to the longitudinal beam 2 through the first connecting rod 44 and the second connecting rod 45, providing thrust in the y-axis direction, so that the entire vehicle slows down and moves forward while achieving the target y-axial sliding, thereby achieving stability and non-deformation of the energy absorption box 3 and the longitudinal beam 2 under the action of the guide block 41 and the support portion.

[0048] This load path forms a triangular structure between the first and second connecting rods 44, 45, and longitudinal beam 2. Due to the Y-axis force component, the structure stabilizes the crash box 3 and longitudinal beam 2 in the area between the first and second connecting rods 44, 45. Load transfer path: guide block 41 → first connecting rod 44 → second connecting rod 45 → second fixing base 43 → longitudinal beam 2.

[0049] The present invention optimizes the energy absorption structure, load direction and energy transfer path of the front end of the automobile, thereby improving the structural crashworthiness of the vehicle and reducing the aggressiveness of the vehicle, thereby protecting the occupants and reducing injuries to the greatest extent.

[0050] In one embodiment of the vehicle body deformation decoupling device for frontal collisions, the thickness of the first connecting rod 44 is equal to the width of the arcuate groove 412 . This arrangement ensures a stable connection between the first connecting rod 44 and the arcuate groove 412 , further improving the stability of the anti-collision beam 1 and the longitudinal beam 2 .

[0051] In one embodiment of the vehicle body deformation decoupling device for coping with frontal collision conditions of the present invention, Figure 3 As shown, the support portion further includes a first fastening bolt.

[0052] The first fixing seat 42 includes a fixing plate 421, two first fixing blocks 422 and a first fixing hole 423. The first fixing holes 423 are arranged at both ends of the fixing plate 421. The two first fixing blocks 422 are arranged at intervals on the fixing plate 421. The first end of the first connecting rod 44 is rotatably connected to the two first fixing blocks 422. The first fastening bolt passes through the first fixing hole 423 and is connected to the energy absorption box 3.

[0053] The present invention arranges two first fixing blocks 422 at intervals on the fixing plate 421, and rotatably connects the first end of the first connecting rod 44 to the two first fixing blocks 422, and the first fastening bolt passes through the first fixing hole 423 and is connected to the energy absorption box 3, thereby stably fixing the first connecting rod 44 on the energy absorption box 3.

[0054] In one embodiment of the vehicle body deformation decoupling device for coping with frontal collision conditions of the present invention, Figure 4 As shown, the second fixing seat 43 includes a connecting plate 431 and a second fixing block 432. The connecting plate 431 has a second fixing hole 433. A second fastening bolt passes through the second fixing hole 433 to fix the connecting plate 431 on the longitudinal beam 2. The second fixing block 432 is connected to the connecting plate 431, and the first end of the second connecting rod 45 is rotatably connected to the second fixing block 432.

[0055] The present invention connects the second fixing block 432 to the connecting plate 431, the first end of the second connecting rod 45 is rotatably connected to the second fixing block 432, and a second fastening bolt passes through the second fixing hole 433 to fix the connecting plate 431 on the longitudinal beam 2, thereby enabling the second connecting rod 45 to be stably fixed on the longitudinal beam 2, thereby improving the structural strength of the vehicle body deformation decoupling device of the present invention for coping with frontal collision conditions.

[0056] In one embodiment of the vehicle body deformation decoupling device for coping with frontal collision conditions of the present invention, Figure 5 As shown, the decoupling assembly 4 further includes a first rotating shaft.

[0057] The second end of the first connecting rod 44 has a first fixed cylinder 441, and the second end of the second connecting rod 45 is respectively provided with two first connecting cylinders 451. The first fixed cylinder 441 is located between the two first connecting cylinders 451, and the first rotating shaft is rotatably connected to the first fixed cylinder 441 and the first connecting cylinder 451.

[0058] In the present invention, the first fixing cylinder 441 is located between the two first connecting cylinders 451 , and the first rotating shaft is rotatably connected to the first fixing cylinder 441 and the first connecting cylinder 451 , thereby achieving stable rotation of the first connecting rod 44 and the second connecting rod 45 .

[0059] In one embodiment of the vehicle body deformation decoupling device for coping with frontal collision conditions of the present invention, Figure 6 As shown, the decoupling assembly 4 further includes a second rotating shaft and a third rotating shaft.

[0060] Two second connecting tubes 452 are respectively provided on the first end of the second connecting rod 45 ; a first mounting hole is provided on the first fixing block 422 , and a second mounting hole is provided on the second fixing block 432 .

[0061] The second rotating shaft passes through the second fixing cylinder 442 and the first mounting hole respectively, and the third rotating shaft passes through the second connecting cylinder 452 and the second mounting hole respectively.

[0062] The present invention allows the second rotating shaft to pass through the second fixed cylinder 442 and the first mounting hole, and the third rotating shaft to pass through the second connecting cylinder 452 and the second mounting hole, so that the first connecting rod 44 can rotate stably on the first fixed seat 42, and the second connecting rod 45 can rotate stably on the second fixed seat 43. This further enables the present invention to decouple the structural strength design of the longitudinal beam 2 under head-on collision conditions with different overlap rates in a frontal collision, realize the optimal deformation model of each overlapping rate condition according to the different load directions, and improve the structural safety performance of the entire vehicle.

[0063] In one embodiment of the vehicle body deformation decoupling device for coping with frontal collision conditions of the present invention, Figure 6 As shown, a limiting plate 5 is provided on the outer side wall of the first connecting tube 451 and the second connecting tube 452. In this way, when a collision occurs, the limiting plate 5 abuts against the first connecting rod 44, so that the angle between the first connecting rod 44 and the second connecting rod 45 will not change significantly, thereby ensuring the stability of the triangular structure formed between the first connecting rod 44, the second connecting rod 45 and the longitudinal beam 2.

[0064] Although some specific embodiments of the present invention have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the present invention. It should be understood by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the present invention. The scope of the present invention is defined by the appended claims.

Claims

1. A vehicle body deformation decoupling device for coping with frontal collision conditions, characterized in that: include: crash beams, longitudinal beams, crash boxes and decoupling assemblies; The first end of the energy absorption box is vertically connected to the anti-collision beam, and the second end of the energy absorption box is connected to the longitudinal beam; The decoupling assembly includes a guide block and a support portion. The guide block is connected to the end of the anti-collision beam, and an abutment portion is provided on the inner wall of the guide block. The support portion is provided on the energy absorption box and the longitudinal beam. During a collision, the abutment portion contacts the support portion.

2. The vehicle body deformation decoupling device for coping with frontal collision conditions according to claim 1, characterized in that: The abutting portion includes an impact block and an arc-shaped groove. The impact block is arranged on the inner wall of the guide block. The arc-shaped groove is arranged on the inner side of the impact block. The arc-shaped groove abuts against the support portion.

3. The vehicle body deformation decoupling device for coping with frontal collision conditions according to claim 2, characterized in that: The support portion includes a first fixing seat, a second fixing seat, a first connecting rod and a second connecting rod. The first fixing seat is arranged on the inner wall of the energy absorption box, the second fixing seat is arranged on the side wall of the longitudinal beam, the first end of the first connecting rod is rotatably connected to the first fixing seat, and the two ends of the second connecting rod are respectively rotatably connected to the second fixing seat and the second end of the first connecting rod.

4. The vehicle body deformation decoupling device for coping with frontal collision conditions according to claim 3 is characterized in that: The thickness of the first connecting rod is equal to the width of the arc-shaped groove.

5. The vehicle body deformation decoupling device for coping with frontal collision conditions according to claim 3, characterized in that: The support portion further includes a first fastening bolt; The first fixing seat includes a fixing plate, two first fixing blocks and a first fixing hole. The first fixing holes are arranged at both ends of the fixing plate. The two first fixing blocks are arranged at intervals on the fixing plate. The first end of the first connecting rod is rotatably connected to the two first fixing blocks. The first fastening bolt passes through the first fixing hole and is connected to the energy absorption box.

6. The vehicle body deformation decoupling device for coping with frontal collision conditions according to claim 5, characterized in that: The second fixing seat includes a connecting plate and a second fixing block, the connecting plate has a second fixing hole, and a second fastening bolt passes through the second fixing hole to fix the connecting plate on the longitudinal beam, the second fixing block is connected to the connecting plate, and the first end of the second connecting rod is rotatably connected to the second fixing block.

7. The vehicle body deformation decoupling device for coping with frontal collision conditions according to claim 6, characterized in that: The decoupling assembly further includes a first rotating shaft; The second end of the first connecting rod has a first fixed tube, and the second end of the second connecting rod is respectively provided with two first connecting tubes. The first fixed tube is located between the two first connecting tubes, and the first rotating shaft is rotatably connected to the first fixed tube and the first connecting tube respectively.

8. The vehicle body deformation decoupling device for coping with frontal collision conditions according to claim 7, characterized in that: The decoupling assembly further includes a second rotating shaft and a third rotating shaft; The first end of the first connecting rod has a second fixing tube, and the first end of the second connecting rod is respectively provided with two second connecting tubes; the first fixing block is provided with a first mounting hole, and the second fixing block is provided with a second mounting hole; The second rotating shaft passes through the second fixing cylinder and the first mounting hole respectively, and the third rotating shaft passes through the second connecting cylinder and the second mounting hole respectively.

9. The vehicle body deformation decoupling device for coping with frontal collision conditions according to claim 8, characterized in that: Limiting plates are provided on the outer side walls of the first connecting tube and the second connecting tube.

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