Auxiliary frame structure and vehicle

Abstract

The utility model belongs to the technical field of vehicle suspensions, and particularly relates to an auxiliary frame structure and a vehicle. In the auxiliary frame structure, a longitudinal beam assembly comprises a longitudinal beam body, a connecting support, a first support used for being connected with a vehicle lower swing arm and a second support used for being connected with a vehicle stabilizer bar. The longitudinal beam body is connected between the front cross beam and the rear cross beam; the connecting support is connected with the longitudinal beam body and the rear cross beam and located at the inner corner between the longitudinal beam body and the rear cross beam. The first bracket is mounted on the connecting bracket; the second support is connected to the longitudinal beam body and the rear cross beam and located at the outer corner between the longitudinal beam body and the rear cross beam. According to the auxiliary frame structure, the connecting support is installed at the inner corner of the longitudinal beam body and the rear cross beam, the second support is installed at the outer corner of the longitudinal beam body and the rear cross beam, the strength and rigidity of the auxiliary frame structure are improved, and the stability of the vehicle suspension system installed on the auxiliary frame structure is guaranteed.

Description

Technical Field

[0001] The utility model belongs to the technical field of vehicle suspensions, and particularly relates to a subframe structure and a vehicle. Background Art

[0002] The rear subframe is an important part of the vehicle chassis system. It not only plays a role in connecting the swing arm parts, shock-absorbing parts and the vehicle body, but also plays a role in installing and supporting the components in the suspension system. The rear subframe mainly bears excitations such as reducer transmission, tire vibration and vehicle body vibration, and has relatively high requirements for the strength, stiffness, etc. of the rear subframe. In the prior art, the rear subframe generally adopts four-point connection, the rear crossbeam is welded to the longitudinal beam, and reducer mounting brackets are arranged at both connection points. However, the load borne by this area is complex and changeable. Thus, problems such as insufficient strength often exist in the connection area between the longitudinal beam and the rear crossbeam and the weld connection of the mounting bracket, the stiffness of the mounting point is relatively low, and structural resonance occurs. Moreover, the welds are also prone to fatigue durability cracking problems, which in turn lead to poor load-bearing and force transmission capabilities of the rear subframe, as well as structural strength, durability performance and mode. Summary of the Utility Model

[0003] Aiming at the technical problems such as low structural strength of the rear subframe in the prior art, the utility model provides a subframe structure and a vehicle.

[0004] To solve the above problems, the first embodiment of the utility model provides a subframe structure, which includes a front crossbeam, a rear crossbeam and two longitudinal beam assemblies arranged at intervals between the front crossbeam and the rear crossbeam;

[0005] The longitudinal beam assembly includes a longitudinal beam body, a connecting bracket, a first bracket for connecting the vehicle lower control arm and a second bracket for connecting the vehicle stabilizer bar; the longitudinal beam body is connected between the front crossbeam and the rear crossbeam; the connecting bracket connects the longitudinal beam body and the rear crossbeam and is located at the inner corner between the longitudinal beam body and the rear crossbeam; the first bracket is installed on the connecting bracket; the second bracket is connected between the longitudinal beam body and the rear crossbeam and is located at the outer corner between the longitudinal beam body and the rear crossbeam.

[0006] Optionally, the longitudinal beam assembly further includes a lower longitudinal beam, the opposite ends of the lower longitudinal beam are respectively connected to the front crossbeam and the connecting bracket, and the first bracket connects the connecting bracket and the lower longitudinal beam.

[0007] Optionally, the first bracket includes a bracket body, a first side plate and a second side plate connected to opposite sides of the bracket body. The bracket body is provided with a first flange for connecting the connecting bracket, the first side plate is provided with a second flange for connecting the connecting bracket, and the second side plate is provided with a third flange for connecting the lower longitudinal beam.

[0008] Optionally, the longitudinal beam assembly further includes a third bracket for connecting the upper swing arm of the vehicle. The third bracket includes a third side plate and a bent plate connecting the third side plate, and both the third side plate and the bent plate are connected to the longitudinal beam body.

[0009] Optionally, the longitudinal beam assembly further includes a first sleeve and a second sleeve for connecting the vehicle body. The first sleeve and the second sleeve are respectively installed at opposite ends of the longitudinal beam body.

[0010] Optionally, the longitudinal beam assembly further includes a fourth bracket. The fourth bracket includes a first tube for connecting the vehicle mount and a first arm and a second arm connected to opposite outer side walls of the first tube. One end of the first arm away from the first tube is connected to the connecting bracket, and one end of the second arm away from the first tube is connected to the rear cross beam.

[0011] Optionally, the front cross beam is provided with mounting holes, and the subframe structure further includes a second tube installed in the mounting holes and for connecting the vehicle mount.

[0012] Optionally, the front cross beam is provided with connection holes for connecting the vehicle toe link.

[0013] Optionally, both the rear cross beam and the longitudinal beam body are integrally formed parts;

[0014] The rear cross beam is provided with a first inner cavity, and the longitudinal beam body is provided with a second inner cavity;

[0015] The front cross beam includes a first cross beam plate and a second cross beam plate connecting the first cross beam plate, and a third inner cavity is formed between the first cross beam plate and the second cross beam plate.

[0016] Another embodiment of the present invention further provides a vehicle, including the above-mentioned subframe structure.

[0017] In the present utility model, the longitudinal beam body is installed on the front cross beam and the rear cross beam; the connecting bracket is installed at the inner corner of the longitudinal beam body and the rear cross beam, the first bracket is installed on the connecting bracket, the first bracket is used for connecting the vehicle lower swing arm, the second bracket is installed at the outer corner of the longitudinal beam body and the rear cross beam, and the second bracket is used for connecting the vehicle stabilizer bar; since the inner corners and outer corners of the longitudinal beam body and the rear cross beam have sufficient strength and stiffness, the connecting bracket is installed at the inner corner of the longitudinal beam body and the rear cross beam, and the second bracket is installed at the outer corner of the longitudinal beam body and the rear cross beam, thereby improving the strength and stiffness of the subframe structure and ensuring the stability of the vehicle suspension system installed on the subframe structure. In addition, a connecting bracket is provided at the inner corner connection of the rear cross beam and the longitudinal beam body, increasing the strength and stiffness at the connection of the longitudinal beam body and the rear cross beam, and improving the durability performance and mode of the subframe structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present utility model will be further described below with reference to the drawings and embodiments.

[0019] Figure 1 FIG. is a schematic structural diagram of a subframe structure provided by an embodiment of the present utility model;

[0020] Figure 2 FIG. is a schematic structural diagram of the first bracket of the subframe structure provided by an embodiment of the present utility model;

[0021] Figure 3 FIG. is a schematic structural diagram of the third bracket of the subframe structure provided by an embodiment of the present utility model;

[0022] Figure 4 FIG. is a partial schematic structural diagram of the subframe structure provided by an embodiment of the present utility model;

[0023] Figure 5 FIG. is a schematic structural diagram of the fourth bracket of the subframe structure provided by an embodiment of the present utility model.

[0024] The reference numerals in the specification are as follows:

[0025] 1, front cross beam; 11, connecting hole; 2, rear cross beam; 3, longitudinal beam assembly; 31, longitudinal beam body; 32, connecting bracket; 33, first bracket; 331, bracket body; 3311, first flanging; 332, first side plate; 3321, second flanging; 333, second side plate; 3331, third flanging; 34, second bracket; 35, lower longitudinal beam; 36, third bracket; 361, third side plate; 362, bending plate; 37, first sleeve; 38, second sleeve; 39, fourth bracket; 391, first tube; 392, first arm; 393, second arm; 4, second tube. Detailed Implementation Manner

[0026] In order to make the technical problems, technical solutions, and beneficial effects solved by the present utility model clearer and more understandable, the following further details the utility model in conjunction with the accompanying 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] It should be understood that the orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", "front", "rear", "middle", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the 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 of the present utility model.

[0028] As shown in Figure 1 the figure, a subframe structure provided by the first embodiment of the present utility model includes a front cross member 1, a rear cross member 2, and two longitudinal beam assemblies 3 spaced between the front cross member 1 and the rear cross member 2; preferably, the two longitudinal beam assemblies 3 are symmetrically connected between the front cross member 1 and the rear cross member 2.

[0029] The longitudinal beam assembly 3 includes a longitudinal beam body 31, a connecting bracket 32, a first bracket 33 for connecting the vehicle lower control arm, and a second bracket 34 for connecting the vehicle stabilizer bar; the longitudinal beam body 31 is connected between the front cross member 1 and the rear cross member 2; the connecting bracket 32 connects the longitudinal beam body 31 and the rear cross member 2 and is located at the inner corner between the longitudinal beam body 31 and the rear cross member 2; the first bracket 33 is installed on the connecting bracket 32; the second bracket 34 is connected between the longitudinal beam body 31 and the rear cross member 2 and is located at the outer corner between the longitudinal beam body 31 and the rear cross member 2. It can be understood that a first chamber is defined among the connecting bracket 32, the longitudinal beam body 31, and the rear cross member 2; a second chamber is defined among the second bracket 34, the longitudinal beam body 31, and the rear cross member 2.

[0030] In the present utility model, the longitudinal beam body 31 is installed on the front cross beam 1 and the rear cross beam 2; the connecting bracket 32 is installed at the inner corner of the longitudinal beam body 31 and the rear cross beam 2, the first bracket 33 is installed on the connecting bracket 32, and the first bracket 33 is used to connect the vehicle lower swing arm. The second bracket 34 is installed at the outer corner of the longitudinal beam body 31 and the rear cross beam 2, and the second bracket 34 is used to connect the vehicle stabilizer bar. Since both the inner corner and the outer corner of the longitudinal beam body 31 and the rear cross beam 2 have sufficient strength and stiffness, the connecting bracket 32 is installed at the inner corner of the longitudinal beam body 31 and the rear cross beam 2, and the second bracket 34 is installed at the outer corner of the longitudinal beam body 31 and the rear cross beam 2, thereby improving the strength and stiffness of the subframe structure and ensuring the stability of the vehicle suspension system installed on the subframe structure. In addition, a connecting bracket 32 is provided at the inner corner connection of the rear cross beam 2 and the longitudinal beam body 31, increasing the strength and stiffness at the connection of the longitudinal beam body 31 and the rear cross beam 2, and improving the durability performance and mode of the subframe structure.

[0031] In one embodiment, as Figure 1 shown, the longitudinal beam assembly 3 further includes a lower longitudinal beam 35. The opposite ends of the lower longitudinal beam 35 are respectively connected to the front cross beam 1 and the connecting bracket 32, and the first bracket 33 connects the connecting bracket 32 and the lower longitudinal beam 35. It can be understood that the lower longitudinal beam 35 is located below the front cross beam 1. In this embodiment, the design of the lower longitudinal beam 35 further improves the strength and stiffness of the subframe structure. In addition, the first bracket 33 is installed on the lower longitudinal beam 35 and the connecting bracket 32, ensuring the stability of the vehicle lower swing arm installed on the first bracket 33.

[0032] In one embodiment, as Figure 1 and Figure 3As shown, the first bracket 33 includes a bracket body 331, and a first side plate 332 and a second side plate 333 connected to opposite sides of the bracket body 331. A first flanging 3311 for connecting the connecting bracket 32 is provided on the bracket body 331, a second flanging 3321 for connecting the connecting bracket 32 is provided on the first side plate 332, and a third flanging 3331 for connecting the lower longitudinal beam 35 is provided on the second side plate 333. It can be understood that one or more of the first flanging 3311, the second flanging 3321, and the third flanging 3331 can be provided according to actual needs; a first insertion slot for connecting the vehicle lower swing arm is defined among the first side plate 332, the second side plate 333, and the bracket body 331. In this embodiment, the first bracket 33 is connected to the connecting bracket 32 through the first flanging 3311 and the second flanging 3321, and is connected to the lower longitudinal beam 35 through the third flanging 3331, ensuring the stability of the first bracket 33 mounted on the connecting bracket 32 and the lower longitudinal beam 35, and thus ensuring the stability of the vehicle lower swing arm mounted on the subframe.

[0033] In one embodiment, as Figure 1 and Figure 3 shown, the longitudinal beam assembly 3 further includes a third bracket 36 for connecting the vehicle upper swing arm. The third bracket 36 includes a third side plate 361 and a bending plate 362 connected to the third side plate 361. Both the third side plate 361 and the bending plate 362 are connected to the longitudinal beam body 31. It can be understood that the third side plate 361 and the bending plate 362 can be connected to the longitudinal beam body 31 through structures such as flangings; a second insertion slot for connecting the vehicle upper swing arm is provided between the third side plate 361 and the bending plate 362. In this embodiment, both the third side plate 361 and the bending plate 362 are connected to the longitudinal beam body 31, ensuring the stability of the third bracket 36 mounted on the longitudinal beam body 31, and thus ensuring the stability of the vehicle upper swing arm mounted on the subframe.

[0034] In one embodiment, as Figure 1As shown, the longitudinal beam assembly 3 further includes a first sleeve 37 and a second sleeve 38 for connecting to the vehicle body. The first sleeve 37 and the second sleeve 38 are respectively installed at opposite ends of the longitudinal beam body 31. It can be understood that first grooves and second grooves are respectively provided at opposite ends of the longitudinal beam body 31. The first sleeve 37 is installed in the first groove, and the second sleeve 38 is installed in the second groove. Further, a first rubber lining is installed in the inner hole of the first sleeve 37, and a second rubber lining is installed in the inner hole of the second sleeve 38. The first sleeve 37 is connected to the vehicle body through the first rubber lining, and the second sleeve 38 is connected to the vehicle body through the second rubber lining. Since the first rubber lining and the second rubber lining have the function of reducing vibration and noise, the NVH (Noise, Vibration, Harshness) performance of the vehicle is improved.

[0035] In one embodiment, as Figure 1 、 Figure 4 and Figure 5 shown, the longitudinal beam assembly 3 further includes a fourth bracket 39. The fourth bracket 39 includes a first tube 391 for connecting to the vehicle mount and first and second arms 392 and 393 connected to opposite outer sidewalls of the first tube 391. One end of the first arm 392 away from the first tube 391 is connected to the connecting bracket 32, and one end of the second arm 393 away from the first tube 391 is connected to the rear cross beam 2. It can be understood that both the first arm 392 and the second arm 393 can be formed by "U"-shaped sheet metal parts. The first arm 392, the first sleeve 37, and the second arm 393 form a triangular stable structure, ensuring the stiffness and strength of the fourth bracket 39.

[0036] In one embodiment, as Figure 1 shown, the front cross beam 1 is provided with mounting holes. The subframe structure further includes a second tube 4 installed in the mounting holes and for connecting to the vehicle mount. It can be understood that the two first sleeves 37 are arranged symmetrically left and right. The two first sleeves 37 are respectively used as the first and second mounting points on the left and right sides of the front of the vehicle, and the third sleeve is used as the third mounting point on the front side of the front of the vehicle. This three-point "T"-type arranged mount installation structure has better stability, effectively improves the balance stability and anti-impact ability of the four-wheel drive reducer, filters the excitation of the reducer itself and external loads, and enhances the strength and durability performance and NVH performance of the subframe structure.

[0037] In one embodiment, as Figure 1As shown, a connection hole 11 for connecting the vehicle toe link is provided on the front cross member 1. In this embodiment, the vehicle toe link does not require an additional mounting bracket structure. The vehicle toe link is installed through the connection hole 11 of the front cross member 1, and the load of the vehicle toe link can directly act on the front cross member 1. The front cross member 1 is simultaneously connected to the longitudinal beam body 31 and the lower longitudinal beam 35, so that the stiffness and strength at the installation connection between the vehicle toe link and the front cross member 1 are better, the overall force transmission path is more, the force is more evenly distributed, and problems such as NVH performance and fatigue durability cracking will not occur due to low dynamic stiffness and poor welding performance in the connection area. At the same time, the number of parts and welding processes of the subframe structure are reduced, achieving the dual effects of weight reduction and cost reduction.

[0038] In one embodiment, both the rear cross member 2 and the longitudinal beam body 31 are integrally formed parts; a first inner cavity (not shown in the figure) is provided on the rear cross member 2, and a second inner cavity (not shown in the figure) is provided on the longitudinal beam body 31; it can be understood that both the rear cross member 2 and the longitudinal beam body 31 are formed by tubular materials.

[0039] The front cross member 1 includes a first cross member plate and a second cross member plate connecting the first cross member plate. A third inner cavity (not shown in the figure) is formed between the first cross member plate and the second cross member plate. It can be understood that both the first cross member plate and the second cross member plate are "U"-shaped sheet metal parts, so the front cross member 1 is formed by welding two "U"-shaped sheet metal parts together.

[0040] In this embodiment, the front cross member 1, the rear cross member 2, and the two longitudinal beam bodies 31 are all closed-section structures. The front cross member 1, the rear cross member 2, and the two longitudinal beam bodies 31 are the four main beams of the subframe structure. In addition to being welded together by themselves, other components such as the small longitudinal beam body 31 and the connection bracket 32 are fully utilized and welded together, which improves the connection stiffness between the four main beams and is also beneficial to improving the bending and torsional modes of the subframe structure and enhancing the strength of the subframe structure.

[0041] Another embodiment of the present utility model further provides a vehicle including the above-mentioned subframe structure.

[0042] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A subframe structure, characterized in that: It includes a front cross beam, a rear cross beam, and two longitudinal beam assemblies spaced between the front cross beam and the rear cross beam; The longitudinal beam assembly includes a longitudinal beam body, a connecting bracket, a first bracket for connecting a vehicle lower control arm, and a second bracket for connecting a vehicle stabilizer bar; the longitudinal beam body is connected between the front cross beam and the rear cross beam; the connecting bracket connects the longitudinal beam body and the rear cross beam and is located at the inner corner between the longitudinal beam body and the rear cross beam; the first bracket is installed on the connecting bracket; the second bracket is connected to the longitudinal beam body and the rear cross beam and is located at the outer corner between the longitudinal beam body and the rear cross beam.

2. The subframe structure according to claim 1, characterized in that: The longitudinal beam assembly further includes a lower longitudinal beam, opposite ends of which are respectively connected to the front cross beam and the connecting bracket, and the first bracket connects the connecting bracket and the lower longitudinal beam.

3. The subframe structure according to claim 2, characterized in that: The first bracket includes a bracket body and a first side plate and a second side plate connected to opposite sides of the bracket body, the bracket body is provided with a first flange connected to the connecting bracket, the first side plate is provided with a second flange connected to the connecting bracket, and the second side plate is provided with a third flange connected to the lower longitudinal beam.

4. The subframe structure according to claim 1, characterized in that: The longitudinal beam assembly also includes a third bracket for connecting to an upper swing arm of the vehicle, the third bracket includes a third side plate and a bending plate connected to the third side plate, and the third side plate and the bending plate are both connected to the longitudinal beam body.

5. The subframe structure according to claim 1, characterized in that: The longitudinal beam assembly further includes a first sleeve and a second sleeve for connecting a vehicle body, wherein the first sleeve and the second sleeve are respectively installed at opposite ends of the longitudinal beam body.

6. The subframe structure according to claim 1, characterized in that: The longitudinal beam assembly also includes a fourth bracket, which includes a first tube for connecting to the vehicle suspension and a first arm and a second arm connected to two opposite outer side walls of the first tube, the first arm is connected to the connecting bracket at one end away from the first tube, and the second arm is connected to the rear cross beam at one end away from the first tube.

7. The subframe structure according to claim 1, characterized in that: The front cross beam is provided with a mounting hole, and the subframe structure further comprises a second tube which is installed in the mounting hole and is used for connecting the vehicle suspension.

8. The subframe structure according to claim 1, characterized in that: The front cross beam is provided with a connecting hole for connecting the front toe rod of the vehicle.

9. The subframe structure according to claim 1, characterized in that: The rear cross beam and the longitudinal beam body are both integrally formed parts; The rear cross beam is provided with a first inner cavity, and the longitudinal beam body is provided with a second inner cavity; The front cross beam includes a first cross beam plate and a second cross beam plate connected to the first cross beam plate, and a third inner cavity is formed between the first cross beam plate and the second cross beam plate.

10. A vehicle, characterized in that: It comprises the subframe structure as claimed in any one of claims 1 to 9.

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