Longitudinal beam assembly, auxiliary frame assembly and automobile

Abstract

The utility model provides a longitudinal beam assembly, an auxiliary frame assembly and an automobile. The first end of the longitudinal beam assembly is used for being connected with a front cross beam assembly, and the second end of the longitudinal beam assembly is used for being connected with a rear cross beam assembly. In the first direction, the height of the middle portion of the longitudinal beam assembly is larger than that of the two side portions of the longitudinal beam assembly. In the first direction of the longitudinal beam assembly, the middle part of the longitudinal beam assembly is higher than the two side parts of the longitudinal beam assembly, so that the middle part of the longitudinal beam assembly forms a bent collapsing structure, and when the middle part of the longitudinal beam assembly is subjected to external force in the first direction, the longitudinal beam assembly can be collapsed and deformed in the middle part; the collision force is prevented from being continuously transmitted forwards; while the strength and rigidity of the longitudinal beam assembly are guaranteed, the collision performance of the longitudinal beam assembly can be improved, and the collision safety is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicle body structures, in particular to a longitudinal beam assembly, a subframe assembly and an automobile. Background Technique

[0002] With the increasing popularity of automobiles and the speed increase of highways, vehicle collision safety has received more and more attention. The subframe assembly of an automobile is a very important component in the chassis system. For example, the rear subframe is used to connect components such as the vehicle body and the suspension, increasing the stiffness of the suspension and meeting the requirements of rear collision performance. However, most rear subframes are not designed for high-speed collisions in design, and are only designed based on performance requirements such as structural strength / stiffness. When the vehicle undergoes a rear collision condition, especially in the case of a high-speed rear-end collision by a following vehicle, only relying on the rear anti-collision beam of the vehicle body to cope with the risk, without targeted design for the rear subframe. When a high-speed rear-end collision occurs, the rear subframe of the front vehicle being rear-ended is likely to move forward and intrude into the fuel tank or battery pack arranged at the front end of the subframe, resulting in fire or explosion and threatening personal safety.

[0003] The structural shape of the longitudinal beam assembly in the subframe assembly plays a crucial role in the collision performance of the rear subframe. The existing longitudinal beam assembly generally adopts a tubular beam structure. On the premise of meeting the strength requirements, the cross-section of the tubular beam is generally made larger, which is not conducive to collision energy absorption. Content of the Utility Model

[0004] The utility model provides a longitudinal beam assembly, a subframe assembly and an automobile to solve the problem of poor collision energy absorption effect of the existing longitudinal beam assembly.

[0005] A longitudinal beam assembly, the first end of the longitudinal beam assembly is used to connect the front crossbeam assembly, and the second end of the longitudinal beam assembly is used to connect the rear crossbeam assembly;

[0006] In the first direction, the height of the middle part of the longitudinal beam assembly is higher than the height of the two side parts of the longitudinal beam assembly.

[0007] Preferably, the cross-sectional size of the longitudinal beam assembly perpendicular to the first direction gradually increases from back to front in the first direction.

[0008] Preferably, the longitudinal beam assembly includes an upper longitudinal beam plate and a lower longitudinal beam plate; the open side of the upper longitudinal beam plate is connected to the open side of the lower longitudinal beam plate to form a collision energy absorption cavity.

[0009] Preferably, the upper longitudinal beam plate includes a first main board and two first overlapping plates extending from the two side edges of the first main board to the same side of the first main board;

[0010] The longitudinal beam lower plate includes a second main plate and two second overlapping plates extending from both side edges of the second main plate to the same side surface of the second main plate;

[0011] The two first overlapping plates are respectively and correspondingly connected to the two second overlapping plates.

[0012] Preferably, a collapse groove is provided on the longitudinal beam assembly.

[0013] Preferably, there are two collapse grooves, and the two collapse grooves are spaced along a first direction. One collapse groove is located at the front section position of the longitudinal beam assembly, and the other collapse groove is located at the middle section position of the longitudinal beam assembly.

[0014] Preferably, an energy absorption rib is further provided on the longitudinal beam assembly along the first direction, and the energy absorption rib is located between the two collapse grooves.

[0015] Preferably, the energy absorption ribs are two, and the two energy absorption ribs are respectively arranged on both sides of the longitudinal beam assembly along a second direction.

[0016] A subframe assembly includes a front crossbeam assembly, a rear crossbeam assembly, and the two longitudinal beam assemblies;

[0017] The front crossbeam assembly and the rear crossbeam assembly are spaced along the first direction, and the two longitudinal beam assemblies are spaced along the second direction;

[0018] The first end of the longitudinal beam assembly is connected to the front crossbeam assembly, and the second end of the longitudinal beam assembly is connected to the rear crossbeam assembly.

[0019] An automobile includes the subframe assembly.

[0020] The longitudinal beam assembly provided by the embodiment of the present invention is applied to the subframe assembly. During installation, the longitudinal beam assembly is arranged along the first direction. The first end of the longitudinal beam assembly is connected to the front crossbeam assembly, and the second end of the longitudinal beam assembly is connected to the rear crossbeam assembly. In this way, the longitudinal beam assembly can transfer the collision force received by the rear crossbeam assembly to the front crossbeam assembly, or transfer the collision force received by the front crossbeam assembly to the rear crossbeam assembly, so as to improve the collision performance of the subframe assembly. During design, in the first direction, the height of the middle part of the longitudinal beam assembly is higher than that of the two side parts of the longitudinal beam assembly, so that the middle part of the longitudinal beam assembly forms a bending and collapsing structure. When it is subjected to an external force along the first direction, the longitudinal beam assembly can collapse and deform in the middle part, thereby preventing the collision force from continuously transmitting forward; while ensuring the strength and stiffness of the longitudinal beam assembly, the collision performance of the longitudinal beam assembly can be improved, and the collision safety can be enhanced. Description of the Drawings

[0021] To more clearly illustrate the technical solutions of the embodiments of the present utility model, the following will briefly introduce the drawings required for the description of the embodiments of the present utility model. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0022] Figure 1 is an axonometric view of a longitudinal beam assembly in an embodiment of the present utility model;

[0023] Figure 2 is an axonometric view of the upper longitudinal beam plate in an embodiment of the present utility model;

[0024] Figure 3 is an axonometric view of a subframe assembly in an embodiment of the present utility model.

[0025] Wherein, 1, longitudinal beam assembly; 11, upper longitudinal beam plate; 111, first main board; 112, first overlapping board; 12, lower longitudinal beam plate; 121, second main board; 122, second overlapping board; 2, front crossbeam assembly; 3, rear crossbeam assembly; 4, crush groove; 5, energy-absorbing rib. Detailed implementation manners

[0026] In order to make the technical problems, technical solutions and beneficial effects solved by the present utility model more clearly understood, the following further details the present utility model in conjunction with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0027] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "longitudinal", "radial", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model 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 to the present utility model. In the description of the present utility model, unless otherwise specified, the meaning of "a plurality" is two or more.

[0028] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", and "coupling" 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, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0029] An embodiment of the present utility model provides a longitudinal beam assembly 1, which is arranged along a first direction. Referring to Figure 1 , the first end of the longitudinal beam assembly 1 is used to connect to the front cross beam assembly 2, and the second end of the longitudinal beam assembly 1 is used to connect to the rear cross beam assembly 3; in the first direction, the height of the middle part of the longitudinal beam assembly 1 is higher than the height of the two side parts of the longitudinal beam assembly 1.

[0030] Wherein, the first direction is the length direction of the longitudinal beam assembly 1, which is the front-rear direction of the vehicle in an automobile.

[0031] As an example, this longitudinal beam assembly 1 is applied to a subframe assembly. During installation, the longitudinal beam assembly 1 is arranged along the first direction. The first end of the longitudinal beam assembly 1 is connected to the front cross beam assembly 2, and the second end of the longitudinal beam assembly 1 is connected to the rear cross beam assembly 3. In this way, the longitudinal beam assembly 1 can transfer the collision force received by the rear cross beam assembly 3 to the front cross beam assembly 2, or transfer the collision force received by the front cross beam assembly 2 to the rear cross beam assembly 3, so as to improve the collision performance of the subframe assembly. During design, in the first direction, the height of the middle part of the longitudinal beam assembly 1 is higher than the height of the two side parts of the longitudinal beam assembly 1, so that a bending and collapsing structure is formed in the middle part of the longitudinal beam assembly 1. When an external force along the first direction acts on it, the longitudinal beam assembly 1 can collapse and deform in the middle part, thereby preventing the collision force from continuously transmitting forward; while ensuring the strength and stiffness of the longitudinal beam assembly 1, the collision performance of the longitudinal beam assembly 1 can be improved, and the collision safety can be enhanced. Among them, the longitudinal beam assembly 1 can be applied to many devices, playing a supporting role, capable of transmitting collision forces, and improving the collision energy absorption effect of the device.

[0032] In one embodiment, referring to Figure 1 , the cross-sectional size of the longitudinal beam assembly 1 perpendicular to the first direction gradually increases from back to front along the first direction.

[0033] As an example, during design, the cross-sectional size of the longitudinal beam assembly 1 perpendicular to the first direction gradually increases from the rear to the front in the first direction; the cross-section at the lap joint between the second end of the longitudinal beam assembly 1 and the rear crossbeam assembly 3 is relatively small and has low strength, mainly serving as a collision energy absorption area. The cross-section at the lap joint between the first end of the longitudinal beam assembly 1 and the front crossbeam assembly 2 is the largest and has the strongest strength. By varying the cross-section of the longitudinal beam assembly 1, the impact force of the collision is blocked from affecting the front crossbeam assembly 2, protecting the front crossbeam assembly 2 from damage during a collision and preventing any impact on the fuel tank and battery pack arranged at the front end of the front crossbeam assembly 2.

[0034] In one embodiment, referring to Figure 1 , the longitudinal beam assembly 1 includes a longitudinal beam upper plate 11 and a longitudinal beam lower plate 12; the open sides of the longitudinal beam upper plate 11 and the longitudinal beam lower plate 12 are connected to form a collision energy absorption cavity.

[0035] As an example, the longitudinal beam assembly 1 includes a longitudinal beam upper plate 11 and a longitudinal beam lower plate 12; during installation, the open sides of the longitudinal beam upper plate 11 and the longitudinal beam lower plate 12 are connected to form a collision energy absorption cavity, which can effectively absorb the collision force to improve the collision performance of the longitudinal beam assembly 1.

[0036] In one embodiment, referring to Figure 1 , the longitudinal beam upper plate 11 includes a first main board 111 and two first overlapping plates 112 extending from the two side edges of the first main board 111 to the same side of the first main board 111; the longitudinal beam lower plate 12 includes a second main board 121 and two second overlapping plates 122 extending from the two side edges of the second main board 121 to the same side of the second main board 121; the two first overlapping plates 112 are respectively connected to the two second overlapping plates 122 correspondingly.

[0037] As an example, the longitudinal beam upper plate 11 includes a first main board 111 and two first overlapping plates 112; the two first overlapping plates 112 are respectively extended from the two side edges of the first main board 111 to the same side of the first main board 111; the longitudinal beam lower plate 12 includes a second main board 121 and two second overlapping plates 122, and the two second overlapping plates 122 are respectively extended from the two side edges of the second main board 121 to the same side of the second main board 121; during installation, the two first overlapping plates 112 are respectively connected to the two second overlapping plates 122 correspondingly. In this way, the first main board 111, the two first overlapping plates 112, the second main board 121, and the two second overlapping plates 122 cooperate to form a collision energy absorption cavity, which can effectively absorb the collision force to improve the collision performance of the longitudinal beam assembly 1.

[0038] In one embodiment, referring to Figure 2 , a crush groove 4 is provided on the longitudinal beam assembly 1.

[0039] As an example, a crush groove 4 is provided on the longitudinal beam assembly 1. The crush groove 4 can absorb collision energy and effectively improve the collision performance of the longitudinal beam assembly 1. Among them, the crush groove 4 can be provided on the upper longitudinal beam plate 11 or on the lower longitudinal beam plate 12.

[0040] In one embodiment, referring to Figure 2 , there are two crush grooves 4. The two crush grooves 4 are spaced along the first direction. One crush groove 4 is located at the front section of the longitudinal beam assembly 1, and the other crush groove 4 is located at the middle section of the longitudinal beam assembly 1.

[0041] As an example, there are two crush grooves 4. The two crush grooves 4 are spaced along the first direction on the longitudinal beam assembly 1. One crush groove 4 is located at the front section of the longitudinal beam assembly 1, and the other crush groove 4 is located at the middle section of the longitudinal beam assembly 1; specifically, two crush grooves 4 are spaced along the first direction on the upper longitudinal beam plate 11. During design, one crush groove 4 is located at the front section of the upper longitudinal beam plate 11, and the other crush groove 4 is located at the middle section of the upper longitudinal beam plate 11. When a rear collision occurs to the vehicle, most of the collision energy is first absorbed by the crush groove 4 located at the front section of the upper longitudinal beam plate 11, and then the remaining collision energy is absorbed by the crush groove 4 located at the middle section of the upper longitudinal beam plate 11. At this time, most of the transmitted collision force is absorbed, and the subframe assembly is bent and crushed in the middle part of the longitudinal beam assembly 1, thereby preventing the collision force from continuously conducting through the longitudinal beam assembly 1 to the front crossbeam assembly 2, which may cause the subframe assembly to invade the fuel tank and battery pack at the front end, improving the collision safety of the whole vehicle.

[0042] In one embodiment, referring to Figure 2 , an energy-absorbing rib 5 is further provided on the longitudinal beam assembly 1 along the first direction. The energy-absorbing rib 5 is located between the two crush grooves 4.

[0043] As an example, an energy-absorbing rib 5 is further provided on the longitudinal beam assembly 1 along the first direction. Specifically, the energy-absorbing rib 5 is provided on the upper longitudinal beam plate 11. The energy-absorbing rib 5 is located between the two crush grooves 4. The energy-absorbing rib 5 can ensure that the collision energy is conducted along the upper longitudinal beam plate 11. When a rear collision occurs to the vehicle, the crush groove 4 located at the front section of the upper longitudinal beam plate 11 absorbs most of the collision energy, and the excess collision energy continues to be transmitted along the energy-absorbing rib 5 to the crush groove 4 located at the middle section of the upper longitudinal beam plate 11. At this time, most of the transmitted collision force is absorbed, and the subframe assembly is bent and crushed in the middle part of the longitudinal beam assembly 1, thereby preventing the collision force from continuously conducting through the longitudinal beam assembly 1 to the front crossbeam assembly 2, which may cause the subframe assembly to invade the fuel tank and battery pack at the front end, improving the collision safety of the whole vehicle.

[0044] In one embodiment, referring to Figure 2 , the energy-absorbing rib 5 is provided as two. The two energy-absorbing ribs 5 are respectively arranged on both sides of the longitudinal beam assembly 1 along the second direction.

[0045] Wherein, the second direction is perpendicular to the first direction and is the width direction of the longitudinal beam assembly 1, which is the left - right direction of the vehicle in an automobile.

[0046] As an example, two energy - absorbing ribs 5 are provided. During installation, the two energy - absorbing ribs 5 are respectively arranged on both sides of the longitudinal beam assembly 1 along the second direction, specifically on both sides of the upper longitudinal beam plate 11 along the second direction. This can further ensure that the collision energy is conducted along the longitudinal beam assembly 1, improve the force - transmission effect, and prevent the longitudinal beam assembly 1 from being bent due to the offset of the collision force.

[0047] The embodiment of the present utility model provides a sub - frame assembly. Refer to Figure 1 、 Figure 2 and Figure 3 , which includes a front cross - beam assembly 2, a rear cross - beam assembly 3, and two longitudinal beam assemblies 1. The front cross - beam assembly 2 and the rear cross - beam assembly 3 are arranged at intervals along the first direction, and the two longitudinal beam assemblies 1 are arranged at intervals along the second direction. The first end of the longitudinal beam assembly 1 is connected to the front cross - beam assembly 2, and the second end of the longitudinal beam assembly 1 is connected to the rear cross - beam assembly 3.

[0048] As an example, the sub - frame assembly includes a front cross - beam assembly 2, a rear cross - beam assembly 3, and two longitudinal beam assemblies 1. The front cross - beam assembly 2 and the rear cross - beam assembly 3 are arranged at intervals along the first direction, and the two longitudinal beam assemblies 1 are arranged at intervals along the second direction. The first end of the longitudinal beam assembly 1 is connected to the front cross - beam assembly 2, and the second end of the longitudinal beam assembly 1 is connected to the rear cross - beam assembly 3. In this way, the longitudinal beam assembly 1 can transfer the collision force received by the rear cross - beam assembly 3 to the front cross - beam assembly 2, and can also transfer the collision force received by the front cross - beam assembly 2 to the rear cross - beam assembly 3, so as to improve the collision performance of the sub - frame assembly. During design, in the first direction, the height of the middle part of the longitudinal beam assembly 1 is higher than that of the two side parts of the longitudinal beam assembly 1, so that the middle part of the longitudinal beam assembly 1 forms a bending and crushing structure. When it is subjected to an external force along the first direction, the longitudinal beam assembly 1 can be crushed and deformed in the middle part, thereby preventing the collision force from continuously transmitting forward. While ensuring the strength and stiffness of the longitudinal beam assembly 1, the collision performance of the longitudinal beam assembly 1 can be improved, and the collision safety can be enhanced.

[0049] The sub - frame assembly is an important component of the automobile chassis and plays a role in load - bearing. The characteristics of the sub - frame assembly, such as stiffness, strength, NVH, and collision performance, play a crucial role in the safety and comfort performance of the whole vehicle. The sub - frame assembly in this example can greatly improve the rear - collision performance through the reasonable arrangement and ingenious design of the longitudinal beam assembly 1, and has a simple structure, a simple manufacturing process, less development cost investment, and a short development cycle.

[0050] The embodiment of the present utility model provides an automobile, which includes a body structure.

[0051] As an example, the subframe assembly includes a front crossmember assembly 2, a rear crossmember assembly 3, and two longitudinal beam assemblies 1; the front crossmember assembly 2 and the rear crossmember assembly 3 are arranged at intervals in the first direction, and the two longitudinal beam assemblies 1 are arranged at intervals in the second direction; the first end of the longitudinal beam assembly 1 is connected to the front crossmember assembly 2, and the second end of the longitudinal beam assembly 1 is connected to the rear crossmember assembly 3; in this way, the longitudinal beam assembly 1 can transfer the collision force received by the rear crossmember assembly 3 to the front crossmember assembly 2, or transfer the collision force received by the front crossmember assembly 2 to the rear crossmember assembly 3, so as to improve the collision performance of the subframe assembly. During design, in the first direction, the height of the middle part of the longitudinal beam assembly 1 is higher than the height of the two side parts of the longitudinal beam assembly 1, so that the middle part of the longitudinal beam assembly 1 forms a bending and crushing structure. When an external force in the first direction acts on it, the longitudinal beam assembly 1 can be crushed and deformed in the middle part, thereby preventing the collision force from continuously transmitting forward; while ensuring the strength and stiffness of the longitudinal beam assembly 1, the collision performance of the longitudinal beam assembly 1 can be improved, and the collision safety can be enhanced.

[0052] The above-described embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the various embodiments of the present invention, and should all be included within the protection scope of the present invention.

Claims

1. A longitudinal beam assembly, characterized in that: The first end of the longitudinal beam assembly is used to connect to the front cross beam assembly, and the second end of the longitudinal beam assembly is used to connect to the rear cross beam assembly; In the first direction, the height of the middle portion of the longitudinal beam assembly is higher than the heights of the side portions of the longitudinal beam assembly.

2. The longitudinal beam assembly according to claim 1, characterized in that: The cross-sectional size of the longitudinal beam assembly perpendicular to the first direction gradually increases from the back to the front along the first direction.

3. The longitudinal beam assembly according to claim 1, characterized in that: The longitudinal beam assembly comprises a longitudinal beam upper plate and a longitudinal beam lower plate; the opening side of the longitudinal beam upper plate is connected to the opening side of the longitudinal beam lower plate to form a collision energy absorption cavity.

4. The longitudinal beam assembly according to claim 3, characterized in that: The longitudinal beam upper plate includes a first main plate and two first lap plates extending from both side edges of the first main plate to the same side of the first main plate; The longitudinal beam lower plate includes a second main plate and two second lap plates extending from both side edges of the second main plate to the same side of the second main plate; The two first lap plates are connected to the two second lap plates respectively.

5. The longitudinal beam assembly according to claim 1, characterized in that The longitudinal beam assembly is provided with a collapse groove.

6. The longitudinal beam assembly according to claim 5, characterized in that There are two collapse grooves, which are spaced apart along the first direction, one collapse groove is located at the front section of the longitudinal beam assembly, and the other collapse groove is located at the middle section of the longitudinal beam assembly.

7. The longitudinal beam assembly according to claim 6, characterized in that: The longitudinal beam assembly is also provided with energy absorbing ribs arranged along the first direction, and the energy absorbing ribs are located between the two collapse grooves.

8. The longitudinal beam assembly according to claim 7, characterized in that There are two energy absorbing ribs, and the two energy absorbing ribs are respectively arranged on both sides of the longitudinal beam assembly along the second direction.

9. A subframe assembly, characterized in that: It comprises a front cross beam assembly, a rear cross beam assembly and two longitudinal beam assemblies according to any one of claims 1 to 8; The front cross beam assembly and the rear cross beam assembly are arranged at intervals along a first direction, and the two longitudinal beam assemblies are arranged at intervals along a second direction; The first end of the longitudinal beam assembly is connected to the front cross beam assembly, and the second end of the longitudinal beam assembly is connected to the rear cross beam assembly.

10. An automobile, characterized in that: Includes the subframe assembly described in claim 9.

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