Vehicle body rear collision protection structure and vehicle

Abstract

The invention provides a vehicle body rear collision protection structure and a vehicle. The vehicle body rear collision protection structure comprises a rear floor assembly, an electric appliance module, a mounting bracket and a rear panel, and the rear panel is arranged at the rear part of the rear floor assembly. The installation support is fixed to the upper portion of the rear floor assembly. And the electric appliance module is fixed on the mounting bracket. And during rear collision, the mounting bracket can drive the electric appliance module to turn upwards. The electric appliance module is driven to turn over through the mounting bracket when the vehicle collides, so that the problems of short circuit, fire, high-voltage electric leakage and the like caused by extrusion and collision of the electric appliance module are avoided. And meanwhile, the electric appliance module is prevented from colliding with the rear panel and the rear row seat, and the collision safety is improved.

Description

Technical Field

[0001] The present application relates to the field of vehicles, and in particular to a vehicle body rear collision protection structure and a vehicle. Background Art

[0002] With the advancement of automotive technology, more and more models are adopting hybrid architectures, and the trend towards intelligent driving leads to an increasing number of electronic components. Therefore, the entire vehicle must be equipped with a gasoline-powered system, an electric-powered system, and numerous electronic components. In pursuit of the ultimate passenger compartment space efficiency, the vehicle's front and rear overhangs are relatively short, ultimately resulting in the placement of many electronic components unable to avoid collision deformation zones. In the event of a collision, dangerous conditions such as short circuits, fires, and high-voltage leakage are likely to occur. Furthermore, electronic components can easily strike the rear seatbacks, causing impact injuries to rear-seat passengers.

[0003] With the surge in the number of electronic components in hybrid vehicles, the shortened rear overhang has forced the placement of electrical modules within the collision deformation zone. Existing technology increases the rear overhang to avoid this zone, but this reduces passenger compartment space, impacts styling, and limits crashworthiness. Furthermore, traditional rigid mounting methods make electrical modules susceptible to compression and short-circuiting in rear-end collisions, resulting in reduced collision safety.

[0004] Therefore, it is necessary to provide an improved vehicle body rear collision protection structure and a vehicle to solve the above problems. Summary of the Invention

[0005] The present application provides a vehicle body rear collision protection structure and a vehicle with high collision safety.

[0006] The present application provides a vehicle body rear collision protection structure, comprising: a rear floor assembly, an electrical module, a mounting bracket and a rear panel; the rear panel is arranged at the rear of the rear floor assembly; the mounting bracket is fixed to the upper part of the rear floor assembly; the electrical module is fixed to the mounting bracket; and the mounting bracket can drive the electrical module to flip upward during a rear collision.

[0007] Furthermore, the mounting bracket is arranged along the front-to-back direction, and the mounting bracket includes a straight section supporting the electrical module and a raised section arranged behind the electrical module; the rear end of the raised section is fixed to the rear panel, and the straight section is fixed to the rear floor assembly.

[0008] Furthermore, the straight section includes a raised portion fixed to the electrical module and a flange arranged on the edge of the raised portion, and the flange is connected to the rear floor assembly; and / or, the raised section includes a main board portion and a bent portion extending downward from the edge of the main board portion.

[0009] Furthermore, a downward bending point is formed at the connection between the raised section and the straight section, a first reinforcing rib close to the downward bending point is provided on the straight section, and a second reinforcing rib close to the downward bending point is provided on the raised section.

[0010] Furthermore, the tilting angle of the tilting section is 30° to 60°, and the tilting height of the tilting section is 40 mm to 70 mm.

[0011] Furthermore, the mounting bracket also includes a bending section arranged on the front side of the electrical module, the bending section bends downward from the straight section and then extends horizontally forward; the connection between the bending section and the straight section forms an upward bending point.

[0012] Furthermore, the vehicle body rear collision protection structure also includes a rear seat, and the electrical module is arranged between the rear seat and the rear panel; the rear seat is arranged close to the front edge of the mounting bracket.

[0013] Furthermore, the electrical module and the straight section are both arranged horizontally; there are two mounting brackets, which are arranged side by side on the left and right sides of the electrical module.

[0014] Furthermore, the mounting bracket includes several first mounting points connected to the rear floor assembly and several second mounting points connected to the electrical module; the several first mounting points are welding points or screw connection holes; the second mounting points are arranged on both sides and the rear side of the electrical module.

[0015] The present application also provides a vehicle, comprising the vehicle body rear collision protection structure as described above.

[0016] This application provides a mounting bracket to cause the electrical module to flip in the event of a vehicle collision, preventing the electrical module from being squeezed and collided, which could cause short circuits, fires, high-voltage leakage, and other problems. At the same time, it prevents the electrical module from hitting the rear panel and rear seats, improving collision safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 4 is a top view of a vehicle body rear impact protection structure according to an exemplary embodiment of the present application.

[0018] Figure 2 It is a perspective view of the vehicle body rear collision protection structure of the present application.

[0019] Figure 3 yes Figure 2 A top view of the rear impact protection structure of the vehicle body is shown.

[0020] Figure 4 yes Figure 2A perspective view of the rear impact protection structure of the vehicle body from another perspective is shown.

[0021] Figure 5 This is a top view of the rear floor assembly, electrical module, mounting bracket and rear panel of the rear vehicle body collision protection structure of the present application after assembly.

[0022] Figure 6 This is a three-dimensional diagram of the assembled electrical module, mounting bracket, and rear panel of the vehicle body rear collision protection structure of the present application.

[0023] Figure 7 This is a three-dimensional diagram of the assembled electrical module, mounting bracket, rear panel and rear seats of the vehicle body rear collision protection structure of the present application.

[0024] Figure 8 It is a three-dimensional view of the mounting bracket of the vehicle body rear collision protection structure of the present application.

[0025] Figure 9 yes Figure 8 Top view of the mounting bracket shown.

[0026] Figure 10 yes Figure 8 Side view of the mounting bracket shown.

[0027] Figure 11 This is a schematic diagram of the electrical module flipping up after a collision of the rear collision protection structure of the vehicle body of the present application.

[0028] Figure 12 and Figure 11 Schematic diagram of the same state but at different angles.

[0029] Explanation of Figure Numbers

[0030] 1. Rear floor assembly; 2. Electrical module; 211. Front mounting point; 2111. Connection hole; 212. Rear mounting point; 2121. Fixing hole; 3. Mounting bracket; 301. Mounting hole; 31. Straight section; 311. First reinforcement rib; 312. Raised portion; 3121. Weight-reducing hole; 313. Flanged edge; 32. Raised section; 321. Second reinforcement rib; 322. Main board; 323. Bending portion; 33. Bending section; 331. Main body; 332. Extension; 34. Downward bending point; 35. Upward bending point; 36. First mounting point; 37. Second mounting point; 4. Rear panel; 5. Rear seats; 6. Rear anti-collision beam. DETAILED DESCRIPTION

[0031] Here, the technical solutions in the embodiments (or "implementations") of the present application will be clearly and completely described in conjunction with the accompanying drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements.

[0032] If there are terms related to directional indications or positional relationships in the embodiments of this application (such as up, down, left, right, front, back, inside, outside, top, bottom, center, vertical, horizontal, longitudinal, transverse, length, width, counterclockwise, clockwise, axial, radial, circumferential, etc.), such terms are only used to explain the relative positional relationship, movement, etc. between the components in a specific posture (as shown in the accompanying drawings); if the specific posture changes, the directional indication or positional relationship will also change accordingly. In addition, the terms "first" and "second" in the embodiments of this application are only used for the purpose of convenience of description and should not be understood as indicating or implying relative importance.

[0033] See also Figures 1 to 4 As shown, the present application provides a vehicle body rear collision protection structure including: a rear floor assembly 1, an electrical module 2, a mounting bracket 3, a rear panel 4, a rear seat 5, and a rear anti-collision beam 6. The electrical module 2 is fixed to the mounting bracket 3. The mounting bracket 3 is fixed to the upper part of the rear floor assembly 1. The rear panel 4 and the rear anti-collision beam 6 are arranged at the rear of the rear floor assembly 1. The rear seat 5 is fixed to the rear floor assembly 1 and is located in front of the electrical module 2. The electrical module 2 is arranged between the rear seat 5 and the rear panel 4. The rear seat 5 is arranged near the front edge of the mounting bracket 3.

[0034] During a rear-end collision, the mounting bracket 3 can cause the electrical module 2 to flip upward. In the embodiment of the present application, the upper portion refers to the upper portion along the vehicle body's height, the front portion refers to the front portion along the vehicle body's length, and the rear portion refers to the rear portion along the vehicle body's length. The rear floor assembly 1 extends along both the vehicle body's length and width. The rear floor assembly 1 is integrally formed by casting. The electrical module 2, mounting bracket 3, and rear seats 5 are all secured to the upper portion of the rear floor assembly 1. The rear portion of the rear floor assembly 1 extends to the rear panel 4.

[0035] The electrical module 2 and the mounting bracket 3 are fixed by a plurality of second mounting points 37. The plurality of second mounting points 37 include a front mounting point 211 and a rear mounting point 212. The front mounting point 211 is arranged on both sides of the electrical module 2, and the rear mounting point 212 is arranged at the rear of the electrical module 2. The number of the front mounting points 211 and the rear mounting points 212 are both two. In addition, the electrical module 2 can also be fixed by a three-point installation, that is, the number of the front mounting points 211 is two, and the number of the rear mounting point 212 is one. This application does not limit the number of the front mounting points 211 and the rear mounting points 212. In the embodiment of the present application, the two sides are the two sides along the width direction of the vehicle body.

[0036] The front mounting point 211 is provided with a connection hole 2111, and the rear mounting point 212 is provided with a fixing hole 2121. The mounting bracket 3 is provided with multiple mounting holes 301. The connection holes 2111 and the fixing holes 2121 are aligned with the multiple mounting holes 301. Fasteners are assembled between the connection holes 2111 and the mounting holes 301, and between the fixing holes 2121 and the mounting holes 301, to secure the electrical module 2 to the mounting bracket 3.

[0037] The connection strength of front mounting point 211 is weaker than that of rear mounting point 212, making it easier for front mounting point 211 to disengage during a collision. This difference in connection strength between the front and rear mounting points allows for orderly disengagement of the mounting points. After a collision, front mounting point 211 separates to guide the upward flipping of electrical module 2, while rear mounting point 212 remains connected to maintain the stability of the disengagement trajectory of electrical module 2.

[0038] In some embodiments, the front mounting point 211 can use low-preload bolts to reduce connection strength. The rear mounting point 212 can be secured using high-strength rivets or welding. Furthermore, the preload force of the bolts at the front mounting point 211 can be lower than that at the rear mounting point 212.

[0039] See also Figures 5 to 7 As shown, the mounting bracket 3 is arranged along the front-to-back direction. The mounting bracket 3 includes a straight section 31, a raised section 32 and a bent section 33 connected together. The straight section 31 is arranged below the electrical module 2 to support the electrical module 2. The straight section 31 is fixed to the rear floor assembly 1. The raised section 32 is arranged behind the electrical module 2 and the rear end of the raised section 32 is fixed to the rear panel 4. The bent section 33 is arranged on the front side of the electrical module 2. The bent section 33 bends downward from the straight section 31 and then extends horizontally forward. The raised section 32 gradually rises upward from front to back and acts as a lever fulcrum in a collision, converting most of the collision kinetic energy into a lifting torque and pressing down along the height direction of the vehicle body, thereby driving the bent section 33 and the front end of the straight section 31 to flip upward.

[0040] See also Figures 8 to 10 As shown, the straight section 31 includes a raised portion 312 fixed to the electrical module 2 and a flange 313 provided on the edge of the raised portion 312. The flange 313 is welded to the rear floor assembly 1. A weight-reducing hole 3121 is provided on the raised portion 312 along the length direction of the vehicle body. The cross section of the raised portion 312 is U-shaped. The raised section 32 includes a main plate portion 322 and a bent portion 323 extending downward from the edge of the main plate portion 322, and the cross section of the raised section 32 is U-shaped. The bent section 33 includes a main body portion 331 and an extension portion 332 extending from the main body portion 331 to both sides, and the extension portion 332 is connected to the rear floor assembly 1. The cross section of the bent section 33 is U-shaped. The straight section 31, the raised section 32 and the bent section 33 with a U-shaped cross section improve the rigidity and strength of the mounting bracket 3.

[0041] Along the width of the vehicle body, the width of both the raised section 32 and the bent section 33 is smaller than that of the straight section 31. The raised section 32 is tilted relative to the straight section 31. The narrow-to-wide transition structure of the raised, straight, and bent sections 32, 31, and 33, directs stress concentration toward the bend point. Furthermore, the curved lower edge of the bent portion 323 of the raised section 32 buffers impact torque, providing more time for the electrical module 2 to flip.

[0042] In some other embodiments, a collapsible hydraulic rod is used to replace the rigid tilting section 32 to achieve progressive downward pressure. In addition, the straight section 31 and the tilting section 32 can also be of a split structure and connected by bolts.

[0043] The connection between the raised section 32 and the straight section 31 forms a downward bend 34. The straight section 31 is provided with a first reinforcing rib 311 near the downward bend 34. The raised section 32 is also provided with a second reinforcing rib 321 near the downward bend 34. The strength of the first and second reinforcing ribs 311 and 321 is greater than that of the downward bend 34, thereby inducing deformation of the mounting bracket 3 at the downward bend 34 during a collision.

[0044] The tilting angle of the tilted section 32 ranges from 30° to 60°, meaning the included angle a between the tilted section 32 and the horizontal plane containing the straight section 31 is within a range of 30° to 60°. The tilting height of the tilted section 32 ranges from 40mm to 70mm, meaning the height h from the connection point between the tilted section 32 and the rear panel 4 to the horizontal plane containing the straight section 31 is within a range of 40mm to 70mm. This tilting angle of the tilted section 32 ensures that the tilting trajectory of the electrical module 2 avoids the rear seats 5. Furthermore, the tilting height optimizes the lever arm length of the tilted section 32, improving its downward pressure efficiency.

[0045] The connection between the bent section 33 and the straight section 31 forms an upward bending point 35. The bent section 33 and the straight section 31 form a secondary lever, and the mechanical gain generated by the downward deformation of the tilting section 32 pushes the bent section 33 upward, thereby smoothly flipping the electrical module 2 forward and upward.

[0046] The electrical module 2 and the straight section 31 are both arranged horizontally. Two mounting brackets 3 are provided, placed side by side on the left and right sides of the electrical module 2. This dual-bracket layout disperses impact loads. Furthermore, the horizontal arrangement of the two mounting brackets 3 prevents wiring entanglement, improving the success rate of a successful flip. Alternatively, a single or multiple mounting brackets 3 may be provided; this application does not impose any restrictions on the number of mounting brackets 3.

[0047] The mounting bracket 3 includes several first mounting points 36 for connection to the rear floor assembly 1 and several second mounting points 37 for connection to the electrical module 2. The first mounting points 36 are either welding points or screw holes. The first mounting points 36 are located on the flange 313 and the extension 332. The second mounting points 37 are located on both sides and the rear of the electrical module 2 and on the raised portion 312.

[0048] See also Figure 11 and Figure 12 As shown, in the event of a rear-end collision, the rear barrier pushes the tilted section 32 of the mounting bracket 3 downward, thereby pushing the front end of the bent section 33 and the straight section 31 of the mounting bracket 3 to cause the front end of the electrical module 2 to flip upward, thus preventing the electrical module 2 from being squeezed and also preventing the electrical module 2 from hitting the backrest of the rear seat 5, thus protecting both the electrical safety of the electrical module 2 and the impact safety of the occupants. Within a certain collision speed range, such as Figure 11 As shown, there is a gap between the electrical module 2 and the rear seat 5. Figure 12 As shown, there is also a gap between the electrical module 2 and the rear panel 4. By providing the mounting bracket 3, the present application can meet the collision safety requirements of vehicles at high speeds such as 84km / h to 100km / h, and avoid crushing collisions between the electrical module 2, the rear panel 4, and the rear seats 5.

[0049] The rear collision protection structure of this application adopts different protection strategies for the electrical module in response to rear-end collisions at different vehicle speeds. At low and medium speeds, the rear collision force is less damaging, and the basic rear vehicle structure can effectively protect the electrical module, meeting safety requirements. In high-speed collisions, such as those between 84km / h and 100km / h, the rear vehicle body is equipped with an inducing flipping structure or protective structure to cause the electrical module to flip or fall off, thereby avoiding collision with the rear seat and other structures in front, thus meeting the collision impact safety requirements of high-speed collisions.

[0050] When the speed or impact exceeds a certain level, such as speeds greater than 100 km / h, the power is cut off. This allows ample time for power to be disconnected should the electrical module flip or fall off. This application significantly improves rear-end collision safety by adopting a segmented rear-end collision protection strategy, effectively reducing injuries to vehicle occupants.

[0051] The present application also provides a vehicle, comprising the vehicle body rear collision protection structure as described above.

[0052] The present application provides a mounting bracket 3 to cause the electrical module 2 to flip in the event of a vehicle collision, thereby preventing the electrical module 2 from being squeezed and collided, thereby preventing short circuits, fires, high-voltage leakage, and other problems. At the same time, it prevents the electrical module 2 from colliding with the rear panel 4 and rear seats 5, thereby improving collision safety.

[0053] It should be noted that the technical solutions or technical features described in the above embodiments can be combined or supplemented with each other without conflict. The scope of protection of this application is not limited to the precise structures described in the above embodiments and shown in the accompanying drawings; all modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of this application shall be included in the scope of protection of this application.

Claims

1. A vehicle body rear collision protection structure, characterized in that: include: Rear floor assembly, electrical module, mounting bracket and rear panel; the rear panel is arranged at the rear of the rear floor assembly; the mounting bracket is fixed to the upper part of the rear floor assembly; The electrical module is fixed on the mounting bracket; in the event of a rear-end collision, the mounting bracket can drive the electrical module to flip upward.

2. The vehicle body rear collision protection structure according to claim 1, characterized in that: The mounting bracket is arranged along the front-to-back direction, and the mounting bracket includes a straight section supporting the electrical module and a raised section arranged behind the electrical module; the rear end of the raised section is fixed to the rear panel, and the straight section is fixed to the rear floor assembly.

3. The vehicle body rear collision protection structure according to claim 2, characterized in that: The straight section includes a raised portion fixed to the electrical module and a flange arranged on the edge of the raised portion, and the flange is connected to the rear floor assembly; and / or, the raised section includes a main board portion and a bent portion extending downward from the edge of the main board portion.

4. The vehicle body rear collision protection structure according to claim 2, characterized in that: A downward bending point is formed at the connection between the warped section and the straight section. A first reinforcing rib close to the downward bending point is provided on the straight section, and a second reinforcing rib close to the downward bending point is provided on the warped section.

5. The vehicle body rear collision protection structure according to claim 2, characterized in that: The tilting angle of the tilting section is 30° to 60°, and the tilting height of the tilting section is 40mm to 70mm.

6. The vehicle body rear collision protection structure according to claim 2, characterized in that: The mounting bracket further includes a bent section arranged on the front side of the electrical module, the bent section bends downward from the straight section and then extends horizontally forward; the connection between the bent section and the straight section forms an upward bending point.

7. The vehicle body rear impact protection structure according to claim 1, characterized in that: The vehicle body rear collision protection structure further includes a rear seat, and the electrical module is arranged between the rear seat and the rear panel; the rear seat is arranged close to the front edge of the mounting bracket.

8. The vehicle body rear collision protection structure according to claim 2, characterized in that: The electrical module and the straight section are both arranged horizontally; there are two mounting brackets, which are arranged side by side on the left and right sides of the electrical module.

9. The vehicle body rear impact protection structure according to claim 1, characterized in that: The mounting bracket includes several first mounting points connected to the rear floor assembly and several second mounting points connected to the electrical module; the several first mounting points are welding points or screw connection holes; the second mounting points are arranged on both sides and the rear side of the electrical module.

10. A vehicle, characterized in that: The vehicle body rear impact protection structure comprises the vehicle body rear impact protection structure according to any one of claims 1 to 9.

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