Rear longitudinal beam assembly, vehicle body structure and vehicle
By adding rear longitudinal beam reinforcement and support structure to the rear longitudinal beam structure, the problem of existing rear longitudinal beams being difficult to deform and slip in segments during collisions is solved, and higher collision safety and maintenance economy are achieved.
Patent Information
- Application Number
- CN202421376659.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-17
- Publication Date
- 2025-02-25
- Estimated Expiration
- 2034-06-17
AI Technical Summary
The existing rear longitudinal beam structure is difficult to achieve segmental deformation during collisions, and it is prone to slip, affecting the collision safety and maintenance economy of the vehicle.
Design a rear longitudinal beam assembly with a combined structure. By adding rear longitudinal beam reinforcement inside the rear longitudinal beam body, a two-stage segmented deformation structure is formed, and support is added on the matching surface between the frame and the rear longitudinal beam body. Structure to prevent slippage.
The segmented deformation of the rear longitudinal beam is achieved, which meets the needs of complex collision deformation and prevents slippage, improving the collision safety and maintenance economy of the vehicle.
Smart Images
Figure CN222522723U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of vehicle body structures, in particular to a rear longitudinal beam assembly and a vehicle body structure and a vehicle having the rear longitudinal beam assembly. Background Art
[0002] With the development of automobiles, people have higher and higher requirements for the passive safety of the whole vehicle. In the design standards of rear-end collision safety, various automobile companies have also introduced American standard high-speed rear-end collision and additional collision energy, in the hope that their products can have more advantages in market competition; the rear longitudinal beam and rear anti-collision beam are part of the rear structure of the vehicle. When the vehicle encounters a collision such as a rear-end collision, it plays a very important role in protecting the lives of people in the vehicle. In order to achieve better energy consumption performance, processes such as aluminum alloy die-casting and extruded aluminum are widely used in the design of the rear longitudinal beam structure.
[0003] At present, the mainstream structural design of the rear longitudinal beam is mainly to connect the rear longitudinal beam with the middle structure of the rear frame through bolts. This design can make full use of the excellent crush energy absorption characteristics of aluminum alloy profiles to better protect the passenger compartment structure in rear collisions. However, due to the process characteristics of aluminum alloy profiles, it is difficult to achieve segmented deformation of the rear longitudinal beam to cope with complex collision deformation requirements; at the same time, the bolt connection between the rear longitudinal beam and the frame is easy to cause the rear longitudinal beam body to slip in collision conditions with high energy, which in turn leads to the degradation of the vehicle's maintenance economy evaluation.
[0004] Therefore, it is necessary to improve the existing rear longitudinal beam structure so that it can change the crush characteristics according to the collision requirements of the whole vehicle, give full play to the crush characteristics of the profile aluminum alloy, and solve the problem of slippage of the rear longitudinal beam after collision of the traditional structure. Utility Model Content
[0005] In view of this, the utility model provides a rear longitudinal beam assembly, a body structure and a vehicle, which designs the aluminum rear longitudinal beam as a combined structure so that it has segmented deformation capability to cope with complex collision deformation requirements; at the same time, a supporting structure is added to the matching surface between the frame and the rear longitudinal beam body, thereby solving the problem of slippage of the rear longitudinal beam after a collision in the traditional structure.
[0006] The utility model provides a rear longitudinal beam assembly, comprising a rear longitudinal beam body and a rear longitudinal beam reinforcement member arranged inside the rear longitudinal beam body, the rear longitudinal beam body having a first end portion for connecting with a vehicle body frame body and a second end portion for connecting with a rear anti-collision beam of the vehicle body, a cross section of the rear longitudinal beam reinforcement member at one end portion in its own length direction is aligned with a cross section at the first end portion in the vehicle body length direction, and the other end portion of the rear longitudinal beam reinforcement member along its own length direction is arranged between the first end portion and the second end portion of the rear longitudinal beam body.
[0007] Furthermore, the rear longitudinal beam body is composed of an aluminum extrusion, and a lapping portion for lapping with the vehicle body rear floor is provided on the side wall in the vehicle body width direction, and the lapping portion is formed by the side wall of the rear longitudinal beam body extending outward in the vehicle body width direction.
[0008] Furthermore, the rear longitudinal beam body is provided with a first mounting hole for connecting with the vehicle frame main body at the first end portion, and a plurality of the first mounting holes are provided on the peripheral side plates at the first end portion of the rear longitudinal beam body.
[0009] Furthermore, the rear longitudinal beam reinforcement is provided with second mounting holes corresponding to and matching with the first mounting holes on the peripheral side plates at the first end portion.
[0010] Furthermore, the rear longitudinal beam reinforcement is composed of an aluminum extrusion, and the cross section of the rear longitudinal beam reinforcement is in a shape similar to the Chinese character 'Ri' (日).
[0011] Furthermore, it further includes a mounting plate provided at the second end portion of the rear longitudinal beam body. The mounting plate covers the cross section at the second end portion of the rear longitudinal beam body, and the mounting plate has third mounting holes for connecting the rear longitudinal beam body to the rear anti-collision beam.
[0012] Furthermore, the mounting plate extends outward to form a periphery protruding from the second end portion, and the third mounting holes are provided on the periphery of the mounting plate.
[0013] A vehicle body structure includes a vehicle frame main body, a rear anti-collision beam, and the above-mentioned rear longitudinal beam assembly provided between the vehicle frame main body and the rear anti-collision beam. The vehicle frame main body has a connecting portion for connecting with the rear longitudinal beam assembly.
[0014] Furthermore, a support structure is provided at the matching surface of the connecting portion and the end portion of the rear longitudinal beam assembly, and the support structure is used to prevent the rear longitudinal beam assembly from colliding and slipping.
[0015] A vehicle is equipped with the above-mentioned vehicle body structure.
[0016] The beneficial effects of the present utility model are as follows: The rear longitudinal beam assembly, vehicle body structure, and vehicle provided by the present utility model improve the overall deformation mode of the rear longitudinal beam by adding an auxiliary strengthening structure inside the rear longitudinal beam body, so that it forms a two-stage segmented deformation structure to meet complex collision deformation requirements; at the same time, a support structure is added on the matching surface between the vehicle frame and the rear longitudinal beam body, which not only ensures the full play of the crushing characteristics of the profiled aluminum alloy but also meets the special requirements of the vehicle's collision performance. Description of the Drawings
[0017] The following further describes the present utility model in conjunction with the drawings and embodiments:
[0018] Figure 1 It is a structural schematic diagram of the connection between the rear longitudinal beam assembly and the frame body of the utility model;
[0019] Figure 2 It is a schematic diagram of the exploded structure of the connection between the rear longitudinal beam assembly and the frame body of the utility model;
[0020] Figure 3 It is a top view schematic diagram of the connection between the rear longitudinal beam assembly and the frame body of the utility model;
[0021] Figure 4 for Figure 3 AA section view;
[0022] Figure 5 for Figure 4 The enlarged view of point B in the figure;
[0023] The figures are marked as follows: 1-rear longitudinal beam body; 2-rear longitudinal beam reinforcement; 3-frame body; 4-mounting plate; 5-connecting bolt; 6-lap joint; 7-first end; 8-second end; 9-first mounting hole; 10-second mounting hole; 11-third mounting hole; 12-connecting part; 13-support structure; 14-nut. DETAILED DESCRIPTION
[0024] As shown in the figure, the utility model provides a rear longitudinal beam assembly, including a rear longitudinal beam body 1 and a rear longitudinal beam reinforcement 2 arranged inside the rear longitudinal beam body 1, the rear longitudinal beam body 1 has a first end 7 for connecting to a vehicle body frame body 3 and a second end 8 for connecting to a rear anti-collision beam of the vehicle body, the cross section of the rear longitudinal beam reinforcement 2 at one end in its own length direction is aligned with the cross section at the first end 7 in the vehicle body length direction, and the other end of the rear longitudinal beam reinforcement 2 along its own length direction is arranged between the first end 7 and the second end 8 of the rear longitudinal beam body 1; wherein the rear longitudinal beam body 1 and the rear longitudinal beam reinforcement 2 are both extruded profiles, the rear longitudinal beam body 1 is a beam structure with a rectangular cross section, and the rear longitudinal beam reinforcement 2 is arranged inside the cavity of the rear longitudinal beam body 1; one side end of the rear longitudinal beam reinforcement 2 is aligned with the first end 7 on the rear longitudinal beam body 1, and the so-called alignment specifically refers to the rear The cross-sectional end surface of one side end of the longitudinal beam reinforcement 2 is aligned with the cross-sectional end surface of the first end 7 of the rear longitudinal beam body 1 in the length direction of the vehicle body, and the other side end of the rear longitudinal beam reinforcement 2 is located in the cavity between the first end 7 and the second end 8 of the rear longitudinal beam body 1, so that the rear longitudinal beam assembly forms a two-stage structure in the force transmission direction of the rear vehicle collision, that is, the overlapping and fitting part of the rear longitudinal beam body 1 and the rear longitudinal beam reinforcement 2 forms a rear longitudinal beam retaining section, and the non-overlapping and fitting rear longitudinal beam body 1 forms a rear longitudinal beam energy absorption section, wherein the rear longitudinal beam energy absorption section is used for fully collapsing and absorbing energy and deforming when the rear end of the vehicle is hit, and the rear longitudinal beam retaining section can prevent the rear longitudinal beam from producing obvious crushing deformation during a collision, thereby protecting key components and passenger space; by adding the rear longitudinal beam reinforcement 2 structure inside the rear longitudinal beam body 1, the overall deformation mode of the rear longitudinal beam is improved, so that it forms a two-stage segmented deformation structure to cope with complex collision deformation requirements.
[0025] In this embodiment, the rear longitudinal beam body 1 is made of aluminum extrusions and is provided with a lap joint 6 for lap jointing with the rear floor of the vehicle body on the side wall in the width direction of the vehicle body. The lap joint 6 is formed by extending outward from the side wall of the rear longitudinal beam body 1 in the width direction of the vehicle body; Figure 1 and Figure 2 As shown, the rear longitudinal beam body 1 is manufactured by aluminum alloy extrusion process, and generally uses materials with good crushing performance such as 6063. Its main function is to be a longitudinal beam structural member of the rear of the vehicle, and plays a role in energy absorption and transmission in a collision. In order to enable the rear longitudinal beam as a whole to be connected with the rear floor during installation, a lap joint 6 for lap jointing with the rear floor of the vehicle body is provided on the side wall of the rear longitudinal beam body 1 along the width direction of the vehicle body.
[0026] In this embodiment, the rear longitudinal beam body 1 is provided with a first mounting hole 9 at the first end 7 for connecting with the frame body 3, and a plurality of the first mounting holes 9 are provided on the peripheral side plate of the first end 7 of the rear longitudinal beam body 1; Figure 2As shown, since the rear longitudinal beam body 1 and the vehicle frame main body 3 are generally bolted together, a first mounting hole 9 through which the connecting bolt 5 can pass is provided in the first end portion 7 of the rear longitudinal beam body 1. In order to ensure the connection stability between the rear longitudinal beam body 1 and the vehicle frame main body 3, first mounting holes 9 need to be provided on the peripheral side plates of the first end portion 7 of the rear longitudinal beam body 1.
[0027] In this embodiment, the rear longitudinal beam reinforcement 2 is provided with second mounting holes 10 corresponding to and matching the first mounting holes 9 on the peripheral side plates at the first end portion 7; combined Figure 2 and Figure 4 As shown, since one end of the rear longitudinal beam reinforcement 2 is aligned with the first end portion 7 of the rear longitudinal beam body 1, the connecting bolt 5 will also pass through the rear longitudinal beam reinforcement 2. Therefore, second mounting holes 10 corresponding to and matching the first mounting holes 9 need to be provided on the peripheral side plates of the rear longitudinal beam reinforcement 2 at the first end portion 7 to facilitate bolt connection with the vehicle frame main body 3.
[0028] In this embodiment, the rear longitudinal beam reinforcement 2 is composed of an aluminum extrusion, and the cross-section of the rear longitudinal beam reinforcement 2 is in a shape similar to the Chinese character 'Ri' (日). Among them, the rear longitudinal beam reinforcement 2 is also manufactured by an aluminum alloy extrusion process, and generally a material with better strength is selected, such as 5182-T6. Its main function is to improve the crushing characteristics of the longitudinal beam body, so that the rear longitudinal beam in a specific section does not produce obvious crushing deformation during a collision, thereby protecting key components and the occupant space. The rear longitudinal beam reinforcement 2 is mainly connected to the rear longitudinal beam body 1 in the form of bolts or welding.
[0029] In this embodiment, it further includes a mounting plate 4 provided at the second end portion 8 of the rear longitudinal beam body. The mounting plate 4 covers the cross-section at the second end portion 8 of the rear longitudinal beam body, and the mounting plate 4 has a third mounting hole 11 for connecting the rear longitudinal beam body 1 to the rear anti-collision beam; combined Figure 1 and Figure 2 As shown, the mounting plate 4 is square and manufactured by an aluminum alloy extrusion process. Generally, a material with better strength is selected, such as 5182-T6. It is equipped with studs or nuts on it to provide an installation interface for the rear anti-collision beam. The mounting plate 4 is generally connected to the rear longitudinal beam body 1 by welding or bolts. In order to connect the rear longitudinal beam body 1 to the rear anti-collision beam, a third mounting hole 11 for screwing connection with the rear anti-collision beam is provided in the mounting plate 4.
[0030] In this embodiment, the mounting plate 4 extends outward to form a peripheral edge protruding from the second end portion 8, and the third mounting hole 11 is arranged on the peripheral edge of the mounting plate 4; affected by the rear anti-collision beam structure, and also for the convenience of disassembly and assembly and to reduce the stress concentration effect on the connection between the rear longitudinal beam body 1 and the mounting plate, the mounting plate 4 is extended outward to form a peripheral edge protruding from the second end portion 8, and the third mounting hole 11 is arranged on the peripheral edge to ensure the connection stability between the mounting plate 4 and the rear anti-collision beam.
[0031] This embodiment also provides a vehicle body structure, including a frame body 3, a rear anti-collision beam, and the above-mentioned rear longitudinal beam assembly arranged between the frame body 3 and the rear anti-collision beam, wherein the frame body 3 has a connecting portion 12 for connecting with the rear longitudinal beam assembly; Figures 3 to 5 As shown, the frame body 3 is the main frame structure of the rear part of the frame, and is provided with a connecting portion 12 that can wrap the outer surface of the rear longitudinal beam. The connecting portion 12 is connected to the rear longitudinal beam assembly by bolts, and the connecting portion 12 is also provided with a mounting hole for the connecting bolt 5 to pass through. So far, the connecting bolt 5 passes through the mounting hole, the first mounting hole 9 and the second mounting hole 10 on the frame body 3 in sequence, and finally connects and fixes the frame body 3, the rear longitudinal beam body 1 and the rear longitudinal beam reinforcement 2 through the nut 14, wherein the nut 14 can be a pressure riveted nut to ensure the stability of the whole frame connection; at the same time, the connecting portion 12 is also designed with overlapping portions overlapping the rear floor on the two side panels in the width direction of the vehicle body, and the overlapping portion on the connecting portion 12 and the overlapping portion 6 on the rear longitudinal beam body 1 are located at the same height in the height direction of the vehicle body.
[0032] In this embodiment, a supporting structure 13 is provided at the matching surface between the connecting portion 12 and the end of the rear longitudinal beam assembly, and the supporting structure 13 is used to prevent the rear longitudinal beam assembly from colliding and sliding; Figure 5 As shown, a support structure is reserved on the matching surface between the interior of the connecting portion 12 and the end of the rear longitudinal beam assembly, wherein the support structure 13 specifically refers to a planar structure that can simultaneously support the rear longitudinal beam body 1 and the rear longitudinal beam reinforcement 2 and the frame body 3 in the height direction and transmit the collision force, so as to ensure that under a large collision energy impact, when the bolt clamping force is insufficient, the rear longitudinal beam body 1 can be prevented from obvious slippage, resulting in a decrease in the collision repairability index; the support structure 13 of the frame body 3 is mostly made of stronger structure and material to ensure that it maintains its shape during a collision, and can be formed by integral die-casting or welding of high-strength steel stampings.
[0033] A vehicle is also provided in this embodiment, on which the above-mentioned body structure is installed; by installing the body structure on the vehicle, the crushing characteristics of the profile aluminum alloy can be fully utilized to cope with complex collision deformation requirements, while also ensuring the special requirements of the vehicle's collision performance, meeting the automobile collision safety requirements and specifications, improving the automobile collision safety, and reducing the injuries to the occupants.
[0034] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.
Claims
1. A rear longitudinal beam assembly, characterized in that: It includes a rear longitudinal beam body and a rear longitudinal beam reinforcement provided inside the rear longitudinal beam body. The rear longitudinal beam body has a first end for connecting to the main body of the vehicle body frame and a second end for connecting to the rear anti-collision beam of the vehicle. The cross-section of the rear longitudinal beam reinforcement at one end in its own length direction is aligned with the cross-section at the first end in the vehicle body length direction, and the other end of the rear longitudinal beam reinforcement along its own length direction is provided between the first end and the second end of the rear longitudinal beam body.
2. The rear longitudinal beam assembly according to claim 1, characterized in that: The rear longitudinal beam body is composed of an aluminum extrusion, and a lapping portion for lapping with the rear floor of the vehicle body is provided on the side wall in the vehicle body width direction. The lapping portion is formed by the side wall of the rear longitudinal beam body extending outward in the vehicle body width direction.
3. The rear longitudinal beam assembly according to claim 1, characterized in that: The rear longitudinal beam body is provided with a first mounting hole for connecting to the frame main body at the first end, and a plurality of the first mounting holes are provided on the peripheral side plates at the first end of the rear longitudinal beam body.
4. The rear longitudinal beam assembly according to claim 3, characterized in that: The rear longitudinal beam reinforcement is provided with second mounting holes corresponding to and matching the first mounting holes on the peripheral side plates at the first end.
5. The rear longitudinal beam assembly according to claim 1, characterized in that: The rear longitudinal beam reinforcement is composed of an aluminum extrusion, and the cross-section of the rear longitudinal beam reinforcement is in a shape similar to the Chinese character 'Ri' (日).
6. The rear longitudinal beam assembly according to claim 1, characterized in that: It further includes a mounting plate provided at the second end of the rear longitudinal beam body. The mounting plate covers the cross-section at the second end of the rear longitudinal beam body, and the mounting plate has a third mounting hole for connecting the rear longitudinal beam body to the rear anti-collision beam.
7. The rear longitudinal beam assembly according to claim 6, characterized in that: The mounting plate extends outward to form a periphery protruding from the second end, and the third mounting hole is provided on the periphery of the mounting plate.
8. A vehicle body structure, characterized in that: It includes a frame main body, a rear anti-collision beam, and the rear longitudinal beam assembly according to any one of claims 1 to 7 provided between the frame main body and the rear anti-collision beam. The frame main body has a connecting portion for connecting to the rear longitudinal beam assembly.
9. The vehicle body structure according to claim 8, characterized in that: A support structure is provided at the matching surface of the connecting portion and the end of the rear longitudinal beam assembly. The support structure is used to prevent the rear longitudinal beam assembly from colliding and sliding.
10. A vehicle, characterized in that: The vehicle is equipped with the vehicle body structure according to any one of claims 8 to 9.