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

Abstract

The invention relates to a vehicle body rear cabin structure with high rear collision safety and a vehicle, and belongs to the technical field of vehicles, the vehicle body rear cabin structure with high rear collision safety comprises a rear cabin floor which is provided with a first mounting surface for mounting a vehicle-mounted charger and a second mounting surface for mounting a vehicle-mounted gas storage cylinder, the height of the first mounting surface is greater than that of the second mounting surface, so that the vehicle-mounted charger and the vehicle-mounted gas storage cylinder are staggered in the height direction; the supporting assembly comprises two sets of supports used for installing a vehicle-mounted charger, and the connecting strength of the set of supports close to the vehicle-mounted gas storage cylinder and the rear cabin floor is larger than the connecting strength of the set of supports away from the vehicle-mounted gas storage cylinder and the rear cabin floor. The vehicle-mounted charger and the vehicle-mounted gas storage cylinder can be staggered in the height direction of the vehicle body, meanwhile, in the rear collision process of the vehicle body, the front end of the vehicle-mounted charger can be overturned upwards, the energy absorption space on the rear collision path of the vehicle body is increased, and the vehicle-mounted charger is effectively protected.

Description

Technical Field

[0001] The present application relates to the technical field of vehicles, and particularly relates 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 rear collision for the rear collision structure and layout is also an urgent problem to be solved. And high-voltage components such as on-board chargers (OBC) of existing pure electric vehicles and hybrid vehicles 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 the related art, the authorized announcement number CN115092264B discloses a rear body rear structure of an automobile, which records: 1) Through new materials and new processes, the requirements for improving body performance and reducing body weight can be met simultaneously, improving the performance of the whole vehicle and reducing fuel consumption, enhancing the driving experience, and reducing 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 the traditional steel welding process, 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 arranged at the positions of the cross beam and the longitudinal beam, making the overall weight after forming lighter than that of the 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 the repair cost; 5) The side beam connecting plate adopts a flat plate type hollow structure, which is composed of triangular partitions arranged in a matrix and transverse reinforcement ribs at its front end, making the entire cross beam part have high strength and torsional stiffness; 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 (vehicle tools).

[0004] However, the rear section of its vehicle body is a sunken box without parts arranged. If high-voltage parts such as on-board chargers are arranged, how to ensure the safety performance requirements has not been described and layout countermeasures have not been provided. Therefore, it is necessary to study and improve the above structure, and provide a rear cabin structure and a vehicle with high rear collision safety, so as to meet higher collision safety requirements by using the layout and structural design of the whole rear cabin. Summary of the Invention

[0005] In view of the deficiencies or one of the deficiencies proposed in the above background art, the embodiments of the present application provide a rear cabin structure and a vehicle with high rear collision safety, which can ensure the high-voltage safety of the whole vehicle during the rear collision of the vehicle through layout and structural design of components.

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

[0007] A rear cabin floor, on which a first mounting surface for mounting an on-board charger and a second mounting surface for mounting an on-board gas cylinder are provided, wherein 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 height direction;

[0008] The support assembly includes two groups of brackets for installing a vehicle-mounted charger, wherein the connection strength between a group of brackets close to the vehicle-mounted gas cylinder and the rear cabin floor is greater than the connection strength between a group of brackets far from the vehicle-mounted 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 and the rear cabin floor have fewer connection points than a group of brackets far from the vehicle-mounted gas cylinder and the rear cabin floor.

[0010] In the first aspect, in some embodiments, a group of brackets close to the vehicle-mounted gas storage bottle is connected to the second mounting surface, and a group of brackets away from the vehicle-mounted gas storage bottle 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 storage bottle is greater than a height dimension of a group of brackets far from the vehicle-mounted gas storage bottle.

[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 a height of the third mounting surface is greater than a 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 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, and 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 legs protruding outward and used to lift 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 a protective block extending to both sides of the high-voltage connector.

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

[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; a support assembly includes two groups of brackets for installing the on-board charger, and the connection strength between a group of brackets close to the on-board gas cylinder and the rear cabin floor is greater than the connection strength between a group of brackets far 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 on-board charger and the rear cabin floor is cleverly set, and the first mounting surface will be pulled downward when the second mounting surface collapses, so that after the front bracket of the on-board charger is separated from the rear cabin floor, the front end of the on-board charger flips upward, increasing the energy absorption space on the rear collision path of the vehicle body, and effectively protecting the on-board charger. That is, the vehicle provided in the embodiment of the present application, through the clever design of the arrangement and component structure of the rear cabin structure of the vehicle body, can ensure the high-voltage safety of the entire vehicle when the vehicle is hit from behind. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. 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 creative work.

[0024] Figure 1 A schematic diagram of the structure of the rear compartment of a vehicle body 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 listed 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. Outrigger; 34. Protective block; 40. On-board gas cylinder; 50. Longitudinal beam; 60. Cross beam. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work 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 cabin is inappropriate.

[0034] a) With the increasing demand for battery life in electric and hybrid vehicles, the entire middle layout area is used for battery packs and fuel tanks to improve battery life, leaving no more space for high-voltage components such as on-board chargers;

[0035] b) The front cabin has insufficient space due to the large size of the hybrid vehicle engine and hybrid module.

[0036] c) To ensure the user's habit of post-charging, the charging port is generally arranged at the rear of the vehicle, and the high-voltage line interface of the on-board charger needs to be connected to the slow charging port. Therefore, the arrangement of 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 in the rear cabin: inappropriate.

[0038] a) The rear cabin floor is a wet area. The on-board charger has a low-voltage interface that is not waterproof. If it is placed under the floor, there will be water wading problems. If it is to be placed under the rear cabin floor, it is necessary to add a waterproof section. This will greatly increase the installation cost of the on-board charger.

[0039] 3. Increase the length of the rear overhang to ensure energy-absorbing space in the rear cabin: inappropriate.

[0040] a) Given a certain vehicle length, the longer the rear overhang, the higher the mechanical space occupancy rate, the lower the cabin space utilization rate, and the less space left for the passenger compartment, which is inconsistent with the design concept.

[0041] b) It has a great influence on the proportion and shape of the whole vehicle, and is usually set according to the smallest and most extreme rear overhang when making 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, which can ensure the high-pressure safety of the entire vehicle when the vehicle collides from behind through the arrangement and structural design of components.

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

[0044] A rear cabin floor 10, on which a first mounting surface 11 for mounting an onboard charger 30 and a second mounting surface 12 for mounting an onboard gas cylinder 40 are provided, 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;

[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 a first mounting surface 11 and a second mounting surface 12. The first mounting surface 11 is used to mount high-voltage components such as an on-board charger 30, and the second mounting surface 12 is used to mount 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 structure and layout design can increase the energy absorption space on the rear collision path of the vehicle body and effectively protect the on-board charger 30. Specifically, the rear cabin floor 10 of the embodiment of the present application is stepped, and the high-voltage components such as the on-board charger 30 are installed on the first mounting surface 11 above the step, and the rigid components such as the on-board gas cylinder 40 are installed on the second mounting surface 12 at the bottom of the step. Since the two are staggered in the height direction of the vehicle body, the rigid components such as the on-board gas cylinder 40 will not directly squeeze the high-voltage components such as the on-board charger 30 during the rear collision of the vehicle body, but will drive the second mounting surface 12 at the bottom of 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 group of brackets 21 away from the vehicle-mounted gas cylinder 40 can be detached from the rear cabin floor 10 after being subjected to force, so that the on-board charger 30 can be flipped around the Y-axis direction of the entire vehicle during the squeezing process. After the front end of the on-board charger 30 is flipped 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 the rear collision.

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

[0051] Since the connection strength between a 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 a group of brackets 21 far from the on-board gas cylinder 40 and the rear cabin floor 10, the group of brackets 21 close to the on-board gas cylinder 40 will be separated from the rear cabin floor 10 before the group of brackets 21 far from the on-board gas cylinder 40. In addition, when the rear cabin floor 10 collapses forward, a downward component force will be generated, which acts on the group of brackets 21 far from 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] That is, the rear cabin floor 10 of the embodiment of the present application is provided with a first mounting surface 11 and a second mounting surface 12 with a height difference, and the second mounting surface 12 is arranged on the rear collision path of the vehicle body. When the rear cabin floor 10 is crushed by a rear collision, the on-board gas cylinder 40 on the second mounting surface 12 will not directly collide with the on-board charger 30 on the first mounting surface 11, so that the on-board charger 30 on the first mounting surface 11 can be protected to a certain extent. At the same time, the connection strength between the front and rear brackets 21 of the on-board charger 30 and the rear cabin floor 10 is cleverly set, and the first mounting surface 11 will be pulled downward when the second mounting surface 12 collapses, so that the front bracket 21 of the on-board charger 30 is separated from the floor of the rear cabin floor 10, and the front end is flipped upward, thereby reducing the damage of the on-board charger 30 being collided and squeezed.

[0053] Exemplarily, 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 smaller 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 less 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 less 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 a group of connection points between a group of brackets 21 close to the vehicle-mounted gas cylinder 40 and the rear cabin floor 10 are less than a group of connection points between a group of brackets 21 far from the vehicle-mounted gas cylinder 40 and the rear cabin floor 10.

[0056] In the embodiment of the present application, the vehicle body rear cabin structure with high rear collision safety has fewer connection points between a group of brackets 21 close to the vehicle gas cylinder 40 and the rear cabin floor 10 than a group of brackets 21 far from the vehicle gas cylinder 40, so that the connection strength between the group of brackets 21 close to the vehicle 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 vehicle 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, a group of brackets 21 close to the on-board gas cylinder 40 can be separated from the rear cabin floor 10 before a 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 away from the on-board gas cylinder 40, so that the group of brackets 21 away from 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 avoiding the front end of the on-board charger 30 being directly squeezed and broken, and reducing the collision damage to the on-board charger 30.

[0058] Exemplarily, in this embodiment, the connection points are welding points, and 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, so that the connection strength between the group of brackets 21 close to the vehicle-mounted gas cylinder 40 and the rear cabin floor 10 is 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 vehicle-mounted gas cylinder 40 of the vehicle body rear compartment structure with high rear collision safety is fixedly installed on the second mounting surface 12, and a group of brackets 21 away from the vehicle-mounted 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 compartment floor 10, the height dimension of the group of brackets 21 close to the vehicle-mounted gas cylinder 40 is greater than the height dimension of the group of brackets 21 away from the vehicle-mounted gas cylinder 40.

[0061] A group of brackets 21 near the vehicle gas cylinder 40 are arranged on the second mounting surface 12. When the vehicle body collides from behind, the front end of the vehicle charger 30 is turned upward to release force, so as to prevent the vehicle charger 30 from being directly squeezed, broken and damaged at the front and rear ends. Specifically, when the vehicle body collides from behind, the rear cabin floor 10 collapses and drives the vehicle gas cylinder 40 on the second mounting surface 12 to squeeze the group of brackets 21 near the vehicle gas cylinder 40, and the force is transmitted to the vehicle charger 30 and the group of brackets 21 at the front end of the vehicle charger 30.

[0062] However, the connection strength of the front group 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 group 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 to pull the rear group 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 force, thereby reducing the damage to the on-board charger 30 caused by the impact force 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 a group of brackets 21 close to the vehicle-mounted gas cylinder 40 has a height dimension greater than a group of brackets 21 away from the vehicle-mounted gas cylinder 40.

[0064] In the vehicle body rear compartment structure with high rear collision safety in the embodiment of the present application, a group of brackets 21 close to the vehicle gas cylinder 40 has a height dimension greater than a group of brackets 21 away from the vehicle gas cylinder 40. Therefore, in order to better support the on-board charger 30 on the first mounting surface 11 of the rear compartment floor 10, the higher group of brackets 21 can be fixedly mounted on the second mounting surface 12, the lower group of brackets 21 can be fixedly mounted on the first mounting surface 11, and 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 number of the brackets 21 close to the vehicle gas cylinder 40 is two, and both are in the shape of a "J", and the number of welding points with the second mounting surface 12 is four; the number of the brackets 21 away from the vehicle gas cylinder 40 is also two, and both are in the shape of a triangle, and the number of welding points with the first mounting surface 11 is two; both sets of brackets 21 are provided with fastener mounting holes for mounting the vehicle charger 30. In some other embodiments, the two sets of brackets 21 can be integrally formed on the vehicle 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, and a third mounting surface 13 for arranging a high-voltage wiring harness 32 on an 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, and the height of the third mounting surface 13 is greater than the height of the first mounting surface 11.

[0067] 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 third mounting surface 13 for arranging the high-voltage wiring harness 32 on the on-board charger 30. 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 the rear collision process, 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 extrusion 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 rear-end collision extrusion path, and 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, and 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, and 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 vehicle body rear cabin structure 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 inclined 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 a group of brackets 21 at the front end of the on-board charger 30 and the first mounting surface 11 is less than the connection strength between a 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 of 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, and 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 are also provided on the rear cabin floor 10 of the vehicle body rear cabin structure with high rear collision safety, and 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 arranged in an integrally formed manner, and a concave structure is arranged 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 a vehicle-mounted 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 vehicle-mounted gas cylinder 40 to resist the impact of the vehicle-mounted gas cylinder 40 moving forward and squeezing the vehicle-mounted charger 30.

[0074] For example, the vehicle-mounted gas cylinder 40 in this embodiment is fixedly mounted on the second mounting surface 12 of the rear cabin floor 10 by means of a mounting frame in a horizontal manner. The vehicle-mounted gas cylinder 40 is arranged along the width direction of the vehicle body. When the vehicle body is subjected to a rear collision, the collision impact force is transmitted to the vehicle-mounted gas cylinder 40, causing the vehicle-mounted gas cylinder 40 to move forward. Since the second side wall 15 and the third side wall 16 are arranged oppositely and the distance between them gradually decreases from the second mounting surface 12 to the first mounting surface 11, the two ends of the vehicle-mounted gas cylinder 40 will respectively abut against the second side wall 15 and the third side wall 16, and the second side wall 15 and the third side wall 16 are squeezed and deformed, which can offset the collision impact force to a certain extent and improve the strength and safety of the vehicle body collision.

[0075] It should be noted that the third mounting surface 13 in the embodiment of the present application is U-shaped. In the top view of 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 connected to the first mounting surface 11 and the second mounting surface 12 at the same time, and the second side wall 15 and the third side wall 16 are connected to the two ends of the first side wall 14 at the same time, 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 vehicle body rear cabin structure 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 surfaces 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 the space utilization rate. Exemplarily, in this embodiment, the edge of the rear cabin floor 10 is 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 bent, 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 to install and arrange 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, wherein the four corners of the on-board charger 30 are provided with outwardly protruding legs 33 for raising 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 fixedly installed with the bracket 21 by bolt fasteners. In this embodiment, in the front and rear direction 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 arrangement 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 an 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] One end of the on-board charger 30 of the vehicle body rear compartment structure with high rear collision safety in the embodiment of the present application is provided with a high-voltage connector 31 and a protective block 34 extending to both sides of the high-voltage connector 31. The protective block 34 can protect the high-voltage connector 31 and prevent the high-voltage connector 31 from being collided and squeezed. Since the high-voltage connector 31 is relatively fragile, if it is squeezed and broken, it will cause the insulation of the whole vehicle to fail, and there is a risk of high-voltage electric shock. Therefore, the high-voltage connector 31 needs to be protected in front and at the 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 protection 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 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, and technical personnel in this field 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, including:

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

[0087] The vehicle in 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, and 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 the 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 on-board charger 30 and the rear cabin floor 10 is cleverly set, and the first mounting surface 11 is pulled downward when the second mounting surface 12 collapses, so that after the front bracket 21 of the on-board charger 30 is separated from the rear cabin floor 10, the front end of the on-board charger 30 flips upward, increasing the energy absorption space on the rear collision path of the vehicle body, and effectively protecting the on-board charger 30. That is, the vehicle provided in the embodiment of the present application, through the clever design of the arrangement and component structure of the rear cabin structure of the vehicle body, can ensure the high-voltage safety of the entire vehicle when the vehicle is hit from behind.

[0089] In the description of the present application, it should be noted that the terms "upper", "lower", etc. 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 the present application and simplifying the description, rather than indicating or implying 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 the present 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 it can be an indirect connection through an intermediate medium, or it can be a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present 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 only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such 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 including 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, the elements defined by the sentence "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0091] The above description is only a specific implementation of the present application, so that those skilled in the art can understand or implement the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest range consistent with the principles and novel features applied for herein.

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 storage bottle (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 storage bottle (40) are staggered in height direction; A support assembly (20) comprises two groups of brackets (21) for mounting an on-board charger (30), wherein the connection strength between a 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 a group of brackets (21) far from the on-board gas cylinder (40) and the rear cabin floor (10).

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

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

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

5. The vehicle body rear compartment structure with high rear collision safety as claimed in claim 1, characterized in that: 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).

6. The vehicle body rear compartment structure with high rear collision safety as claimed in claim 5, characterized in that: The rear cabin floor (10) 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 arranged to be inclined upward.

7. The vehicle body rear compartment structure with high rear collision safety as claimed in claim 5, characterized in that: The rear cabin floor (10) 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 in the direction from the second mounting surface (12) to the first mounting surface (11).

8. The vehicle body rear compartment structure with high rear collision safety as claimed in claim 5, 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).

9. The vehicle body rear compartment structure with high rear collision safety as claimed in claim 1, characterized in that: The four corners of the on-board charger (30) are each provided with legs (33) protruding outwards and used to elevate the on-board charger (30) and for connection with 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).

10. A vehicle, characterized in that: include: A vehicle body rear compartment structure with high rear collision safety as described in any one of claims 1 to 9.

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