Vehicle body rear compartment structure and vehicle with high rear collision safety

Abstract

The present application relates to a vehicle body rear compartment structure and vehicle with high rear-collision safety, belonging to the field of vehicle technology. The vehicle body rear compartment structure with high rear-collision safety includes a rear compartment floor, on which is provided a first mounting surface for mounting an onboard charger and a second mounting surface for mounting an onboard gas cylinder. The height of the first mounting surface is greater than the height of the second mounting surface, so that the onboard charger and the onboard gas cylinder are staggered in the height direction. The support assembly includes two sets of brackets for mounting the onboard charger, and the connection strength between the set of brackets closer to the onboard gas cylinder and the rear compartment floor is greater than the connection strength between the set of brackets farther from the onboard gas cylinder and the rear compartment floor. The onboard charger and the onboard gas cylinder of the present application can be staggered in the height direction of the vehicle body. At the same time, during a rear-end collision of the vehicle body, the front end of the onboard charger can be flipped upward, increasing the energy absorption space in the rear collision path of the vehicle body and effectively protecting the onboard charger.

Description

Technical Field

[0004] ,

[0005]

[0001] This application relates to the technical field of vehicles, and particularly to a rear cabin structure and a vehicle with high rear collision safety. Background Art

[0002] Currently, vehicles are all pursuing vehicle safety performance. How to achieve the US standard for rear collision in terms of rear collision structure and layout is also an urgent problem to be solved. In existing pure electric vehicles and hybrid vehicles, high-voltage components such as on-board chargers (OBCs) are often arranged in the rear cabin area, and it is difficult to ensure safety performance during the rear collision of the whole vehicle.

[0003] In related technologies, the authorized publication number CN115092264B discloses a rear body structure of an automobile, which records: 1) Through new materials and new processes, it can simultaneously meet the requirements of improving body performance and reducing body weight, improve the performance of the whole vehicle and reduce fuel consumption, enhance the driving experience, and reduce travel costs; 2) The front section of the rear body is integrally die-cast, avoiding the staggered welding of structures such as cross beams, longitudinal beams, and reinforcement plates in traditional steel welding processes, reducing the accumulation of connection tolerances, and improving the body precision; 3) The front section of the rear body is made of aluminum alloy material, and a matrix partition structure is set at the positions of the cross beam and the longitudinal beam, making the overall weight after forming lighter than that of traditional steel and having better rigidity; 4) The rear side beam is a "day" - shaped double - cavity structure, which can provide support during a minor rear collision of the vehicle and reduce maintenance costs; 5) The side beam connecting plate adopts a flat - type hollow structure, which is composed of triangular partitions arranged in a matrix and transverse stiffeners at its front end, making the entire cross - beam part have high strength and torsional rigidity; 6) The rear section of the rear floor forms a sunken box - shaped structure, providing more loading space for storing items such as随车工具 (tool kits for the vehicle).

[0004] However, its rear body section is a sunken box without parts arranged. If high - voltage parts such as on - board chargers are arranged, there is no explanation on how to ensure safety performance requirements and layout countermeasures. Therefore, it is necessary to research and improve the above - mentioned structure, and provide a rear cabin structure and a vehicle with high rear collision safety, in order to meet higher collision safety requirements through the layout and structural design of the entire rear cabin. Summary of the Invention

[0005] Aiming at the deficiencies or one of the deficiencies proposed in the above - mentioned background art, the embodiments of this application provide a rear cabin structure and a vehicle with high rear collision safety. Through the layout and structural design of components, it can ensure the high - voltage safety of the whole vehicle during rear collision.

[0006] In the first aspect, the embodiments of this application provide a rear cabin structure with high rear collision safety, including:

[0007] It should be noted that the "随车工具" in the original text seems to be a wrong expression. I translated it as "tool kits for the vehicle" according to the context. If it is a specific Chinese term, it may need to be corrected according to the actual situation.A rear cabin floor having a first mounting surface for mounting an onboard charger and a second mounting surface for mounting an onboard gas cylinder, wherein the first mounting surface is higher than the second mounting surface so that the onboard charger and the onboard gas cylinder are staggered in height;

[0008] The support assembly includes two groups of brackets for installing the on-board charger, and the connection strength between the group of brackets close to the on-board gas cylinder and the rear cabin floor is greater than the connection strength between the group of brackets far from the on-board gas cylinder and the rear cabin floor.

[0009] In the first aspect, in some embodiments, a group of brackets close to the vehicle-mounted gas cylinder has more connection points with the rear cabin floor than a group of brackets far from the vehicle-mounted gas cylinder has more connection points with the rear cabin floor.

[0010] In the first aspect, in some embodiments, a group of brackets close to the vehicle-mounted gas cylinder is connected to the second mounting surface, and a group of brackets away from the vehicle-mounted gas cylinder is connected to the first mounting surface.

[0011] In the first aspect, in some embodiments, a height dimension of a group of brackets close to the vehicle-mounted gas cylinder is greater than a height dimension of a group of brackets far from the vehicle-mounted gas cylinder.

[0012] In the first aspect, in some embodiments, a third mounting surface for arranging a high-voltage wiring harness on an on-board charger is further provided on the rear cabin floor, and the height of the third mounting surface is greater than the height of the first mounting surface.

[0013] In the first aspect, in some embodiments, a first side wall connecting the first mounting surface and the third mounting surface is further provided on the rear cabin floor, and the first side wall is away from the second mounting surface and is inclined upward.

[0014] In the first aspect, in some embodiments, a second side wall and a third side wall connecting the first mounting surface, the second mounting surface and the third mounting surface are further provided on the rear cabin floor. The second side wall and the third side wall are arranged opposite to each other and the distance between them gradually decreases from the second mounting surface to the first mounting surface.

[0015] In the first aspect, some embodiments further include longitudinal beams and transverse beams connected to the rear cabin floor, and the third mounting surface on the rear cabin floor is lower than the upper surfaces of the longitudinal beams and transverse beams.

[0016] On the first aspect, in some embodiments, the four corners of the on-board charger are provided with outwardly protruding legs for raising the on-board charger and for connection of the bracket; one end of the on-board charger is provided with a high-voltage connector and protective blocks extending to both sides of the high-voltage connector.

[0017] In a second aspect, an embodiment of the present application provides a vehicle, comprising:

[0018] The vehicle body rear compartment structure with high rear collision safety as described in any of the above embodiments.

[0019] The beneficial effects of the technical solution provided by this application include:

[0020] An embodiment of the present application provides a vehicle body rear cabin structure and a vehicle with high rear collision safety. Due to the rear cabin floor, a first mounting surface for installing an on-board charger and a second mounting surface for installing an on-board gas cylinder are provided thereon, and the height of the first mounting surface is greater than the height of the second mounting surface so that the on-board charger and the on-board gas cylinder are staggered in the height direction; the support assembly includes two groups of brackets for installing the on-board charger, and the connection strength between the group of brackets close to the on-board gas cylinder and the rear cabin floor is greater than the connection strength between the group of brackets away from the on-board gas cylinder and the rear cabin floor.

[0021] Therefore, the first mounting surface is used to install high-voltage components such as an on-board charger, and the second mounting surface is used to install rigid components such as an on-board gas cylinder. The height of the first mounting surface is greater than the height of the second mounting surface, so that the installed on-board charger and on-board gas cylinder can be staggered in the height direction of the vehicle body, so that rigid components such as the on-board gas cylinder will not directly squeeze the on-board charger.

[0022] At the same time, the connection strength between the front and rear brackets of the onboard charger and the rear compartment floor is cleverly designed. When the second mounting surface collapses, it pulls the first mounting surface downward. This allows the front bracket of the onboard charger to detach from the rear compartment floor, allowing the front end of the onboard charger to flip upward. This increases the energy absorption space in the rear collision path of the vehicle body and effectively protects the onboard charger. In other words, the rear compartment structure of the vehicle provided by the embodiments of the present application, through the clever design of the layout and component structure, can ensure the high-voltage safety of the entire vehicle in the event of a rear-end collision. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0024] Figure 1 A schematic structural diagram of the vehicle body rear compartment structure provided in an embodiment of the present application;

[0025] Figure 2 A schematic diagram of the connection between the bracket and the rear cabin floor provided in an embodiment of the present application;

[0026] Figure 3 A schematic diagram of the structure of the on-board charger provided in an embodiment of the present application.

[0027] In the accompanying drawings, the components represented by the reference numerals are as follows:

[0028] 10. Rear cabin floor; 11. First mounting surface; 12. Second mounting surface; 13. Third mounting surface; 14. First side wall; 15. Second side wall; 16. Third side wall; 20. Support assembly; 21. Bracket;

[0029] 30. On-board charger; 31. High-voltage connector; 32. High-voltage wiring harness; 33. Support legs; 34. Protective block; 40. On-board gas cylinder; 50. Longitudinal beam; 60. Crossbeam. DETAILED DESCRIPTION

[0030] To make the purpose, technical solutions, and advantages of the embodiments of this application more clear, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0031] Problems with existing solutions: High-voltage components such as on-board chargers of existing pure electric vehicles and hybrid vehicles are often arranged in the rear cabin area, making it difficult to ensure safety performance during a rear-end collision.

[0032] Means and measures to be discussed in problem solving:

[0033] 1. Placing high-voltage components such as the on-board charger in the middle section of the lower vehicle body or the front compartment is inappropriate.

[0034] a) With the increasing demand for battery life in electric and hybrid vehicles, the entire central area is allocated to batteries, fuel tanks, and other components to improve battery life, leaving no room for high-voltage components such as onboard chargers.

[0035] b) Due to the large size of the hybrid engine and hybrid module, there is insufficient space in the front cabin.

[0036] c) To ensure users' habit of post-charging, the charging port is generally located at the rear of the vehicle. The high-voltage line interface of the on-board charger needs to be connected to the slow-charging port. Therefore, placing high-voltage components such as the on-board charger in the rear cabin area can save the most on high-voltage line costs.

[0037] 2. Adjust the high-voltage components under the rear cabin floor to avoid being squeezed by parts inside the rear cabin: Not suitable.

[0038] a) The rear cabin floor is a wet area. The onboard charger has a low-voltage port that is not waterproof, so placing it under the floor presents a risk of flooding. Installing it under the rear cabin floor requires additional waterproofing. This significantly increases the installation cost of the onboard charger.

[0039] 3. Increase the length of the rear overhang to ensure energy-absorbing space in the rear cabin: Not suitable.

[0040] a) Given a given vehicle length, a longer rear overhang increases the mechanical space occupancy rate, reduces cabin space utilization, and leaves less space for the passenger compartment, which is inconsistent with the design concept.

[0041] b) It has a significant impact on the proportions and shape of the vehicle, and is usually designed with the rear overhang as minimal and extreme as possible when developing a platform plan.

[0042] In response to the above-mentioned deficiencies or one of the deficiencies, the embodiments of the present application provide a vehicle body rear compartment structure and a vehicle with high rear collision safety. Through the layout and structural design of components, the high-pressure safety of the entire vehicle can be ensured during rear collision.

[0043] See also Figures 1 to 3 As shown, a first aspect of an embodiment of the present application provides a vehicle body rear compartment structure with high rear collision safety, comprising:

[0044] The rear cabin floor 10 is provided with a first mounting surface 11 for mounting the onboard charger 30 and a second mounting surface 12 for mounting the onboard gas cylinder 40. The height of the first mounting surface 11 is greater than the height of the second mounting surface 12 so that the onboard charger 30 and the onboard gas cylinder 40 are staggered in the height direction;

[0045] The support assembly 20 includes two groups of brackets 21 for installing the on-board charger 30. The connection strength between the group of brackets 21 close to the on-board gas cylinder 40 and the rear cabin floor 10 is greater than the connection strength between the group of brackets 21 far from the on-board gas cylinder 40 and the rear cabin floor 10.

[0046] The embodiment of the present application has a rear cabin floor 10 with a rear cabin structure having high rear collision safety, and is provided with a first mounting surface 11 and a second mounting surface 12. The first mounting surface 11 is used to install high-voltage components such as an on-board charger 30, and the second mounting surface 12 is used to install rigid components such as an on-board gas cylinder 40. The rear cabin floor 10 has an improved structure so that the height of the first mounting surface 11 is greater than the height of the second mounting surface 12, so that the installed on-board charger 30 and on-board gas cylinder 40 can be staggered in the height direction of the vehicle body.

[0047] The above-described structure and layout design increases the energy absorption space along the vehicle body's rear collision path, effectively protecting the onboard charger 30. Specifically, the rear cabin floor 10 in the embodiment of the present application is stepped. High-voltage components, such as the onboard charger 30, are mounted on a first mounting surface 11 above the step, while rigid components, such as the onboard gas cylinder 40, are mounted on a second mounting surface 12 below the step. Because these components are staggered in the vehicle body's height, during a rear collision, rigid components, such as the onboard gas cylinder 40, will not directly impact the high-voltage components, such as the onboard charger 30. Instead, they will cause the second mounting surface 12 below the step of the rear cabin floor 10 to collapse forward to absorb energy.

[0048] Furthermore, two groups of brackets 21 for fixing and supporting the on-board charger 30 are installed on the rear cabin floor 10. The two groups of brackets 21 are arranged front and rear along the length direction of the vehicle body, one group of brackets 21 is arranged close to the on-board gas cylinder 40, and the other group of brackets 21 is arranged away from the on-board gas cylinder 40. By cleverly designing the connection strength between the two groups of brackets 21 and the rear cabin floor 10, the connection strength between the group of brackets 21 close to the on-board gas cylinder 40 and the rear cabin floor 10 is greater than the connection strength between the group of brackets 21 away from the on-board gas cylinder 40 and the rear cabin floor 10.

[0049] During a rear-end collision of the vehicle body, a set of brackets 21 away from the on-board gas cylinder 40 can be detached from the rear cabin floor 10 after being subjected to force, allowing the on-board charger 30 to flip around the Y-axis direction of the entire vehicle during the squeezing process. After the front end of the on-board charger 30 flips upward, the energy absorption space on the rear collision path of the rear cabin floor 10 is increased, which can reduce the damage to the on-board charger 30 during a rear-end collision.

[0050] It should be noted that in this embodiment, during a rear-end collision of the vehicle body, the second mounting surface 12 at the lower portion of the step of the rear cabin floor 10 will collapse forward to absorb energy, and the first mounting surface 11 at the upper portion of the step will be pulled downward through the step wall, causing tension and shear forces to be generated between the two sets of brackets 21 that fix and support the on-board charger 30 and the rear cabin floor 10. The tension and shear forces will destroy the connection structure between the brackets 21 and the rear cabin floor 10.

[0051] Because the connection strength between the set of brackets 21 near the on-board gas cylinder 40 and the rear cabin floor 10 is greater than the connection strength between the set of brackets 21 far from the on-board gas cylinder 40 and the rear cabin floor 10, the set of brackets 21 near the on-board gas cylinder 40 will be separated from the rear cabin floor 10 later than the set of brackets 21 far from the on-board gas cylinder 40. In addition, when the rear cabin floor 10 collapses forward, a downward component of force is generated, which acts on the set of brackets 21 near the on-board gas cylinder 40. Therefore, the on-board charger 30 can flip around the Y-axis direction of the entire vehicle during the squeezing process.

[0052] Specifically, the rear deck floor 10 of the present embodiment is provided with a first mounting surface 11 and a second mounting surface 12 with a height difference. The second mounting surface 12 is positioned along the rear collision path of the vehicle body. When the rear deck floor 10 collapses in a rear-end collision, the onboard gas cylinder 40 on the second mounting surface 12 will not directly collide with the onboard charger 30 on the first mounting surface 11. This protects the onboard charger 30 on the first mounting surface 11 to a certain extent. Furthermore, the connection strength between the front and rear brackets 21 of the onboard charger 30 and the rear deck floor 10 is cleverly designed. When the second mounting surface 12 collapses, it pulls downward on the first mounting surface 11, allowing the front bracket 21 of the onboard charger 30 to detach from the floor of the rear deck 10 and flip upward, thereby minimizing damage to the onboard charger 30 caused by collisions and crushing.

[0053] For example, in order to make the connection strength between a group of brackets 21 close to the vehicle-mounted gas cylinder 40 and the rear cabin floor 10 greater than the connection strength between a group of brackets 21 far from the vehicle-mounted gas cylinder 40 and the rear cabin floor 10, the joining surface between the group of brackets 21 close to the vehicle-mounted gas cylinder 40 and the rear cabin floor 10 can be made larger than the joining surface between the group of brackets 21 far from the vehicle-mounted gas cylinder 40 and the rear cabin floor 10. The joining surface can be a bonding area, a welding area, or the cross-sectional size of a rivet, or the cross-sectional size of a bolt fastener.

[0054] In some other embodiments, the number of mounting points between a group of brackets 21 close to the vehicle-mounted gas cylinder 40 and the rear cabin floor 10 can be greater than the number of mounting points between a group of brackets 21 far from the vehicle-mounted gas cylinder 40 and the rear cabin floor 10, that is, the number of mounting points set on the brackets 21 on one side is greater than the number of mounting points on the brackets 21 on the other side, thereby ensuring that the connection strength between the two is inconsistent. The mounting points can be one or more of rivet points, welding points, and fastener mounting points.

[0055] In some optional embodiments, see Figures 1 to 3 As shown, an embodiment of the present application provides a vehicle body rear cabin structure with high rear collision safety, wherein the vehicle body rear cabin structure with high rear collision safety has more connection points between a group of brackets 21 close to the on-board gas cylinder 40 and the rear cabin floor 10 than a group of brackets 21 far from the on-board gas cylinder 40 and the rear cabin floor 10.

[0056] In the embodiment of the present application, the rear cabin structure of the vehicle body with high rear collision safety has more connection points between a group of brackets 21 close to the on-board gas cylinder 40 and the rear cabin floor 10 than between a group of brackets 21 far from the on-board gas cylinder 40 and the rear cabin floor 10, so that the connection strength between the group of brackets 21 close to the on-board gas cylinder 40 and the rear cabin floor 10 can be greater than the connection strength between the group of brackets 21 far from the on-board gas cylinder 40 and the rear cabin floor 10.

[0057] This ensures that when the rear cabin floor 10 of the vehicle body is subjected to a rear collision, the group of brackets 21 close to the on-board gas cylinder 40 can be separated from the rear cabin floor 10 later than the group of brackets 21 away from the on-board gas cylinder 40. In addition, when the rear cabin floor 10 collapses forward, a downward component force can be generated to pull the group of brackets 21 close to the on-board gas cylinder 40, so that the group of brackets 21 close to the on-board gas cylinder 40 pulls the on-board charger 30, causing the front end of the on-board charger 30 to flip upward, thereby preventing the front end of the on-board charger 30 from being directly squeezed and broken, and reducing the collision damage to the on-board charger 30.

[0058] Illustratively, in this embodiment, the connection points are welding points. A group of brackets 21 close to the vehicle-mounted gas cylinder 40 are each provided with four welding points connected to the rear cabin floor 10, and a group of brackets 21 away from the vehicle-mounted gas cylinder 40 are each provided with two welding points connected to the rear cabin floor 10, thereby making the connection strength between the group of brackets 21 close to the vehicle-mounted gas cylinder 40 and the rear cabin floor 10 greater than the connection strength between the group of brackets 21 away from the vehicle-mounted gas cylinder 40 and the rear cabin floor 10. In some other embodiments, the connection points can be rivet points, bolt installation points, bonding points, etc.

[0059] In some optional embodiments, see Figures 1 to 3 As shown, an embodiment of the present application provides a vehicle body rear compartment structure with high rear collision safety, in which a group of brackets 21 close to the vehicle-mounted gas cylinder 40 are connected to the second mounting surface 12, and a group of brackets 21 away from the vehicle-mounted gas cylinder 40 are connected to the first mounting surface 11.

[0060] In the embodiment of the present application, a group of brackets 21 close to the on-board gas cylinder 40 of the rear cabin structure with high rear collision safety is fixedly installed on the second mounting surface 12, and a group of brackets 21 away from the on-board gas cylinder 40 is fixedly installed on the first mounting surface 11. In order to better support the on-board charger 30 on the first mounting surface 11 of the rear cabin floor 10, the height dimension of the group of brackets 21 close to the on-board gas cylinder 40 is greater than the height dimension of the group of brackets 21 away from the on-board gas cylinder 40.

[0061] The brackets 21 near the onboard gas cylinder 40 are arranged on the second mounting surface 12. During a rear-end collision, the onboard charger 30's front end tilts upward to dissipate force, preventing the onboard charger 30 from being directly crushed and damaged at the front and rear ends. Specifically, during a rear-end collision, the rear cabin floor 10 collapses, forcing the onboard gas cylinder 40 on the second mounting surface 12 to press against the brackets 21 near the onboard gas cylinder 40. This force is then transferred to the onboard charger 30 and the brackets 21 at its front end.

[0062] However, the connection strength of the front set of brackets 21 of the on-board charger 30 is weak, and after being subjected to shear force and tension, it detaches before the rear set of brackets 21 of the on-board charger 30. At the same time, when the second mounting surface 12 of the rear cabin floor 10 collapses, a component force is generated that pulls the rear set of brackets 21 of the on-board charger 30 downward, thereby causing the front end of the on-board charger 30 to flip upward to release the force, thereby reducing the damage to the on-board charger 30 caused by the impact of the rear collision.

[0063] In some optional embodiments, see Figures 1 to 3 As shown, an embodiment of the present application provides a vehicle body rear compartment structure with high rear collision safety, in which the height dimension of a group of brackets 21 close to the vehicle-mounted gas cylinder 40 is greater than the height dimension of a group of brackets 21 away from the vehicle-mounted gas cylinder 40.

[0064] In the embodiment of the present application, the height dimension of a group of brackets 21 close to the on-board gas cylinder 40 of the rear cabin structure with high rear collision safety is greater than the height dimension of a group of brackets 21 away from the on-board gas cylinder 40. Therefore, in order to better support the on-board charger 30 on the first mounting surface 11 of the rear cabin floor 10, the higher group of brackets 21 can be fixedly installed on the second mounting surface 12, and the lower group of brackets 21 can be fixedly installed on the first mounting surface 11. The higher group of brackets 21 can also be separated between the on-board gas cylinder 40 and the on-board charger 30 to prevent the on-board charger 30 from being directly squeezed by the on-board gas cylinder 40.

[0065] For example, in this embodiment, the set of brackets 21 near the onboard gas cylinder 40 is two in a "J" shape, with four welds to the second mounting surface 12. The set of brackets 21 farther from the onboard gas cylinder 40 is also two in a triangular shape, with two welds to the first mounting surface 11. Both sets of brackets 21 are provided with fastener mounting holes for mounting the onboard charger 30. In other embodiments, the two sets of brackets 21 can be integrally formed with the onboard charger 30.

[0066] In some optional embodiments, see Figures 1 to 3 As shown, an embodiment of the present application provides a vehicle body rear cabin structure with high rear collision safety. A third mounting surface 13 for arranging the high-voltage wiring harness 32 on the on-board charger 30 is also provided on the rear cabin floor 10 of the vehicle body rear cabin structure with high rear collision safety. The height of the third mounting surface 13 is greater than the height of the first mounting surface 11.

[0067] In the embodiment of the present application, a third mounting surface 13 for arranging the high-voltage wiring harness 32 on the on-board charger 30 is further provided on the rear cabin floor 10 of the rear cabin structure of the vehicle body with high rear collision safety. The height of the third mounting surface 13 is greater than the height of the first mounting surface 11. Therefore, the arrangement height of the high-voltage wiring harness 32 arranged on the third mounting surface 13 can be higher than the on-board charger 30. Therefore, during a rear collision, the on-board charger 30 will not squeeze and damage the high-voltage wiring harness 32.

[0068] If the high-voltage wire harness 32 on the on-board charger 30 is squeezed in the crushing area of ​​a rear-end collision, a short circuit may occur, causing the high-voltage wire harness 32 to leak electricity and ignite and burn. Therefore, the overall direction of the high-voltage wire harness 32 cannot be arranged on the crushing path of the rear-end collision. It needs to be staggered with the on-board charger 30 in the height direction. Although this will cause a certain increase in the layout length of the high-voltage wire harness 32, it ensures safety.

[0069] In some optional embodiments, see Figures 1 to 3 As shown, an embodiment of the present application provides a vehicle body rear cabin structure with high rear collision safety. A first side wall 14 connecting the first mounting surface 11 and the third mounting surface 13 is also provided on the rear cabin floor 10 of the vehicle body rear cabin structure with high rear collision safety. The first side wall 14 is away from the second mounting surface 12 and is inclined upward.

[0070] The rear cabin floor 10 of the rear cabin structure of the vehicle body with high rear collision safety in the embodiment of the present application is also provided with a first side wall 14 connecting the first mounting surface 11 and the third mounting surface 13. The first side wall 14 is away from the second mounting surface 12 and is tilted upward. The first side wall 14 can play a role in protecting the on-board charger 30 from collision.

[0071] Specifically, when the vehicle body is subjected to a rear-end collision, since the connection strength between the group of brackets 21 at the front end of the on-board charger 30 and the first mounting surface 11 is weaker than the connection strength between the group of brackets 21 at the rear end of the on-board charger 30 and the second mounting surface 12, the group of brackets 21 at the front end of the on-board charger 30 detach from the rear cabin floor 10 before the group of brackets 21 at the rear end of the on-board charger 30. When the front end of the on-board charger 30 squeezes the first side wall 14, since the first side wall 14 is away from the second mounting surface 12 and is tilted upward, the front end of the on-board charger 30 can slide up along the first side wall 14 and flip upward to release force, which plays a role in collision buffering to a certain extent, thereby reducing the damage to the on-board charger 30 caused by the rear collision.

[0072] In some optional embodiments, see Figures 1 to 3As shown, an embodiment of the present application provides a vehicle body rear cabin structure with high rear collision safety. The rear cabin floor 10 of the vehicle body rear cabin structure with high rear collision safety is also provided with a second side wall 15 and a third side wall 16 connecting the first mounting surface 11, the second mounting surface 12 and the third mounting surface 13. The second side wall 15 and the third side wall 16 are arranged opposite to each other and the distance between them gradually decreases from the second mounting surface 12 to the first mounting surface 11.

[0073] The rear cabin floor 10 of the rear cabin structure of the vehicle body with high rear collision safety in the embodiment of the present application is an integrally formed setting. A concave structure is provided on the rear cabin floor 10, forming a second side wall 15 and a third side wall 16 connecting the first mounting surface 11, the second mounting surface 12 and the third mounting surface 13. The second side wall 15 and the third side wall 16 are arranged opposite to each other and the distance between them gradually decreases from the second mounting surface 12 to the first mounting surface 11. When the on-board gas cylinder 40 is installed on the second mounting surface 12, the second side wall 15 and the third side wall 16 can limit the two ends of the on-board gas cylinder 40 to resist the impact of the on-board gas cylinder 40 moving forward and squeezing the on-board charger 30.

[0074] For example, the onboard gas cylinder 40 in this embodiment is horizontally mounted and fixed to the second mounting surface 12 of the rear cabin floor 10 using a mounting bracket. The onboard gas cylinder 40 is arranged along the width of the vehicle body. When the vehicle body is subjected to a rear-end collision, the impact force is transmitted to the onboard gas cylinder 40, causing it to move forward. Because the second side wall 15 and the third side wall 16 are arranged opposite each other and the distance between them gradually decreases from the second mounting surface 12 to the first mounting surface 11, the two ends of the onboard gas cylinder 40 abut against the second side wall 15 and the third side wall 16, respectively, causing them to be squeezed and deformed, which can offset the impact force to a certain extent and improve the collision resistance and safety of the vehicle body.

[0075] It should be noted that the third mounting surface 13 in the embodiment of the present application is U-shaped. When viewed from above the vehicle body, the third mounting surface 13 extends to the left and right ends of the first mounting surface 11 and the second mounting surface 12. Therefore, the second side wall 15 and the third side wall 16 are simultaneously connected to the first mounting surface 11 and the second mounting surface 12. At the same time, the second side wall 15 and the third side wall 16 are simultaneously connected to the two ends of the first side wall 14, ensuring that all surfaces on the rear cabin floor 10 can be effectively utilized.

[0076] In some optional embodiments, see Figures 1 to 3 As shown, an embodiment of the present application provides a vehicle body rear cabin structure with high rear collision safety, which also includes a longitudinal beam 50 and a cross beam 60 connected to the rear cabin floor 10, and the third mounting surface 13 on the rear cabin floor 10 is lower than the upper surface of the longitudinal beam 50 and the cross beam 60.

[0077] The rear cabin structure of the vehicle body with high rear collision safety in the embodiment of the present application also includes a longitudinal beam 50 and a cross beam 60 connected to the rear cabin floor 10. The third mounting surface 13 on the rear cabin floor 10 is lower than the upper surface of the longitudinal beam 50 and the cross beam 60, so that the on-board charger 30, the high-voltage wiring harness 32 and the on-board gas cylinder 40 arranged on the rear cabin floor 10 can sink as a whole, effectively improving space utilization. For example, in this embodiment, the edges of the rear cabin floor 10 are welded and fixed to the longitudinal beams 50 on both sides and the middle cross beam 60. In some other embodiments, when the frame specifications are small, the rear cabin floor 10 can be integrally formed with the longitudinal beam 50 and the cross beam 60.

[0078] The longitudinal beam 50 of the embodiment of the present application is curved, and the height of the beam section of the longitudinal beam 50 corresponding to the first mounting surface 11 on the rear cabin floor 10 is greater than the height of the beam section of the longitudinal beam 50 corresponding to the second mounting surface 12. The front end of the rear cabin floor 10 is raised accordingly, which is conducive to raising the first mounting surface 11 for installing and arranging the on-board charger 30. The height difference between the first mounting surface 11 and the second mounting surface 12 can be increased to ensure the rear collision protection effect of the on-board charger 30.

[0079] In some optional embodiments, see Figures 1 to 3 As shown, an embodiment of the present application provides a vehicle body rear compartment structure with high rear collision safety. The four corners of the on-board charger 30 of the vehicle body rear compartment structure with high rear collision safety are provided with outwardly protruding legs 33 for lifting the on-board charger 30 and for connecting the bracket 21; one end of the on-board charger 30 is provided with a high-voltage connector 31 and a protective block 34 extending to both sides of the high-voltage connector 31.

[0080] The on-board charger 30 of the rear compartment structure of the vehicle body with high rear collision safety in the embodiment of the present application has four integrally formed legs 33 protruding outward at the four corners and used to lift the on-board charger 30 and connect to the bracket 21. The legs 33 are fixed to the bracket 21 by bolt fasteners. In this embodiment, in the front and rear directions of the vehicle body where the X-axis is located, a pair of legs 33 at the front end of the on-board charger 30 protrude and extend forward, and a pair of legs 33 at the rear end of the on-board charger 30 protrude and extend backward, so as to conveniently expose the mounting holes on the legs 33 for fastener installation operations. At the same time, the protruding setting of the legs 33 can increase the layout span of the front and rear brackets 21 and improve the installation stability.

[0081] In some optional embodiments, see Figures 1 to 3 As shown, an embodiment of the present application provides a vehicle body rear compartment structure with high rear collision safety, wherein one end of the on-board charger 30 of the vehicle body rear compartment structure with high rear collision safety is provided with a high-voltage connector 31 and protective blocks 34 extending to both sides of the high-voltage connector 31.

[0082] The embodiment of the present application has a high-rear collision safety rear compartment structure with a high-voltage connector 31 and protective blocks 34 extending to both sides of the high-voltage connector 31 at one end of the on-board charger 30. The protective blocks 34 can protect the high-voltage connector 31 and prevent the high-voltage connector 31 from being squeezed. Since the high-voltage connector 31 is relatively fragile, if it is squeezed and broken, it will cause the insulation of the entire vehicle to fail, posing a risk of high-voltage electric shock. Therefore, the high-voltage connector 31 needs to be protected at the front and rear. If the protective frame is supported by the vehicle body floor, the height of the protective frame is too high, the rigidity and strength are poor, the effect is average, and the volume is large and the cost increases significantly.

[0083] In the embodiment of the present application, a protective block 34 is integrally formed directly on the shell of the on-board charger 30. In the direction of the X-axis of the vehicle body, the protective block 34 of the on-board charger 30 is located on the front and rear sides of the high-voltage connector 31, which can protect the high-voltage connector 31 and prevent the high-voltage connector 31 from being squeezed and damaged by the rear collision object. The protective block 34 can protect the high-voltage connector 31 on the on-board charger 30 during the collision process and prevent the high-voltage connector 31 from being directly collided and squeezed.

[0084] It should be noted that the present application does not make specific requirements or special limitations on the structural features such as the size, shape and material of the protective block 34. The function of the protective block 34 in the present application is to prevent the high-voltage connector 31 from being collided and squeezed. Therefore, it can be understood that other protective blocks 34 that can achieve such functions can be used in the present application. Those skilled in the art can adaptively adjust the size, shape and material of the protective block 34 according to the usage scenario and test conditions.

[0085] See also Figures 1 to 3 As shown, a second aspect of an embodiment of the present application provides a vehicle, comprising:

[0086] Any of the above embodiments provides a vehicle body rear compartment structure with high rear collision safety.

[0087] The vehicle of the embodiment of the present application uses the rear compartment structure of the vehicle body with high rear collision safety of any of the above-mentioned embodiments. The first mounting surface 11 is used to install high-voltage components such as the on-board charger 30, and the second mounting surface 12 is used to install rigid components such as the on-board gas cylinder 40. The height of the first mounting surface 11 is greater than the height of the second mounting surface 12, so that the installed on-board charger 30 and the on-board gas cylinder 40 can be staggered in the height direction of the vehicle body, so that rigid components such as the on-board gas cylinder 40 will not directly squeeze the on-board charger 30.

[0088] At the same time, the connection strength between the front and rear brackets 21 of the onboard charger 30 and the rear compartment floor 10 is cleverly designed. When the second mounting surface 12 collapses, it pulls the first mounting surface 11 downward. This allows the front bracket 21 of the onboard charger 30 to separate from the rear compartment floor 10, and the front end of the onboard charger 30 to flip upward. This increases the energy absorption space in the rear collision path of the vehicle body and effectively protects the onboard charger 30. In other words, the vehicle provided in the embodiment of the present application, through the clever design of the layout and component structure of its rear compartment structure, can ensure the high-voltage safety of the entire vehicle in the event of a rear-end collision.

[0089] In the description of this application, it should be noted that the terms "upper" and "lower" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application. Unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be internal communication between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0090] It should be noted that, in this application, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprising a ..." does not exclude the presence of other identical elements in the process, method, article or device comprising the element.

[0091] The foregoing is merely a list of specific embodiments of the present application, intended to enable those skilled in the art to understand or implement the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application is not limited to the embodiments shown herein, but is intended to conform to the broadest scope consistent with the principles and novel features of the present application.

Claims

1. A vehicle body rear compartment structure with high rear collision safety, characterized in that: include: A rear cabin floor (10) is provided with a first mounting surface (11) for mounting an onboard charger (30) and a second mounting surface (12) for mounting an onboard gas cylinder (40), wherein the height of the first mounting surface (11) is greater than the height of the second mounting surface (12) so that the onboard charger (30) and the onboard gas cylinder (40) are staggered in the height direction; A support assembly (20) comprising two sets of brackets (21) for mounting an on-board charger (30), wherein the connection strength between a set of brackets (21) close to the on-board gas cylinder (40) and the rear cabin floor (10) is greater than the connection strength between a set of brackets (21) far from the on-board gas cylinder (40) and the rear cabin floor (10); The rear cabin floor (10) is also provided with a third mounting surface (13) for arranging a high-voltage wiring harness (32) on the on-board charger (30), and the height of the third mounting surface (13) is greater than the height of the first mounting surface (11); The rear cabin floor (10) is further provided with a first side wall (14) connecting the first mounting surface (11) and the third mounting surface (13), wherein the first side wall (14) is away from the second mounting surface (12) and is arranged to be inclined upward; The rear cabin floor (10) is further provided with a second side wall (15) and a third side wall (16) connecting the first mounting surface (11), the second mounting surface (12) and the third mounting surface (13); the second side wall (15) and the third side wall (16) are arranged opposite to each other and the distance between them gradually decreases from the second mounting surface (12) to the first mounting surface (11).

2. The vehicle body rear compartment structure with high rear collision safety according to claim 1, characterized in that: The number of connection points between a group of brackets (21) close to the on-board gas cylinder (40) and the rear cabin floor (10) is greater than the number of connection points between a group of brackets (21) far from the on-board gas cylinder (40) and the rear cabin floor (10).

3. The vehicle body rear compartment structure with high rear collision safety according to claim 1, characterized in that: A group of brackets (21) close to the vehicle-mounted gas cylinder (40) is connected to the second mounting surface (12), and a group of brackets (21) away from the vehicle-mounted gas cylinder (40) is connected to the first mounting surface (11).

4. The vehicle body rear compartment structure with high rear collision safety according to claim 1, characterized in that: The height dimension of a group of brackets (21) close to the vehicle-mounted gas storage cylinder (40) is greater than the height dimension of a group of brackets (21) far from the vehicle-mounted gas storage cylinder (40).

5. The vehicle body rear compartment structure with high rear collision safety according to claim 1, characterized in that: It also includes a longitudinal beam (50) and a transverse beam (60) connected to the rear cabin floor (10), and a third mounting surface (13) on the rear cabin floor (10) is lower than the upper surfaces of the longitudinal beam (50) and the transverse beam (60).

6. The vehicle body rear compartment structure with high rear collision safety according to claim 1, characterized in that: The four corners of the on-board charger (30) are each provided with outwardly protruding legs (33) for elevating the on-board charger (30) and for connecting the bracket (21); one end of the on-board charger (30) is provided with a high-voltage connector (31) and protective blocks (34) extending to both sides of the high-voltage connector (31).

7. A vehicle, characterized in that: include: A vehicle body rear compartment structure with high rear collision safety as claimed in any one of claims 1 to 6.

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