A novel stamped and welded rear subframe

Abstract

This utility model discloses a novel stamped and welded rear subframe, relating to the technical field of automotive chassis structural components. It includes a front tube beam, a rear control arm sleeve, and a suspension sleeve. The front tube beam is welded to the left longitudinal beam, right longitudinal beam, front plate of the rear crossbeam, and rear plate of the rear crossbeam to form a frame structure. At the corners of the frame, left front beam reinforcement plates, right front beam reinforcement plates, left rear beam front reinforcement plates, right rear beam front reinforcement plates, left rear beam rear reinforcement plates, and right rear beam rear reinforcement plates are added. Side reinforcement plates are provided on the outer side of the rear control arm sleeve. These side reinforcement plates adopt a triangular structure and are welded to the front plate of the rear crossbeam, the rear plate of the rear crossbeam, and the right longitudinal beam. The side reinforcement plates extend and are welded onto the right longitudinal beam. The suspension sleeve adopts a flanged structure. This novel stamped and welded rear subframe, employing a novel stamped and welded structure, optimizes the problem of local stress concentration in the mounting brackets when the subframe is subjected to alternating loads, avoiding subframe cracking and failure.

Description

Technical Field

[0001] This utility model relates to the technical field of automotive chassis structural components, specifically a novel stamped and welded rear subframe. Background Technology

[0002] The automotive subframe is a crucial component of the chassis system, primarily supporting the engine, transmission, suspension system, and other parts, while also connecting the body and suspension. As a core component of chassis design, the subframe directly impacts vehicle handling, comfort, and safety. The loads primarily borne by the subframe are transmitted through the control arms, steering gear, and stabilizer bar. Therefore, the rigidity of these mounting points is critical to their ability to withstand the alternating loads transmitted from the tires. Inadequate performance at these mounting points can lead to subframe failure and consequently, safety accidents. To address this, we propose a novel stamped and welded rear subframe to resolve the issue of localized stress concentration at various mounting brackets when the subframe bears alternating loads. Utility Model Content

[0003] The purpose of this utility model is to provide a new type of stamped and welded rear subframe, which adopts a new stamped and welded structure to optimize the problem of local stress concentration of each mounting bracket when the subframe is subjected to alternating loads, and avoids cracking and failure of the subframe.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a novel stamped and welded rear subframe, comprising a front tube beam, a rear swing arm sleeve, and a suspension sleeve:

[0005] The front tube beam is welded together with the left longitudinal beam, right longitudinal beam, front plate of the rear cross beam, and rear plate of the rear cross beam to form a frame structure, and a left front beam reinforcing plate, a right front beam reinforcing plate, a left rear beam front reinforcing plate, a right rear beam front reinforcing plate, a left rear beam rear reinforcing plate, and a right rear beam rear reinforcing plate are added at the corners of the frame.

[0006] A side reinforcing plate is provided on the outer side of the rear swing arm sleeve. The side reinforcing plate adopts a triangular structure and is welded to the front plate of the rear crossbeam, the rear plate of the rear crossbeam and the right longitudinal beam. The side reinforcing plate extends and is welded on the right longitudinal beam.

[0007] The suspension sleeve adopts a flanged structure;

[0008] The front plate of the rear crossbeam and the rear plate of the rear crossbeam together form the rear crossbeam, and the overlap between the upper surface of the rear crossbeam and the left longitudinal beam adopts a surface-fitting structure, and a notch is designed at the overlap of the rear crossbeam and the left longitudinal beam to ensure the fitting length.

[0009] Energy-absorbing ribs are provided on the rear plate of the rear crossbeam.

[0010] Preferably, the left front beam reinforcing plate, right front beam reinforcing plate, left rear beam front reinforcing plate, right rear beam front reinforcing plate, left rear beam rear reinforcing plate, and right rear beam rear reinforcing plate are all configured as triangular structures.

[0011] Preferably, the rear plate of the rear crossbeam is designed with an inward flange at the front toe arm mounting position.

[0012] Compared with the prior art, the beneficial effects of this utility model are: the new stamped and welded rear subframe adopts a new stamped and welded structure, which optimizes the problem of local stress concentration of each mounting bracket when the subframe is subjected to alternating loads, and avoids cracking and failure of the subframe.

[0013] 1. Frame structure; the front tube beam and left and right longitudinal beams adopt hydraulic components, which are lightweight and save welds; the rear beam adopts a stamped structure to meet the assembly and strength requirements of the rear lower arm and steering gear.

[0014] 2. Reinforcing plates have been added to multiple sections of the front and rear beams, resulting in a strong subframe. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the axial structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the connection structure between the side reinforcing plate and the right longitudinal beam of this utility model;

[0017] Figure 3 This is a schematic diagram of the suspension sleeve structure of this utility model;

[0018] Figure 4 This is a schematic diagram of the rear crossbeam and rear plate structure of this utility model;

[0019] Figure 5 This is a schematic diagram of the connection structure between the front plate of the rear crossbeam and the rear plate of the rear crossbeam of this utility model;

[0020] Figure 6 This is a schematic diagram of the energy-absorbing rib structure of this utility model.

[0021] In the diagram: 1. Front tube beam; 2. Left longitudinal beam; 3. Right longitudinal beam; 4. Front plate of rear crossbeam; 5. Rear plate of rear crossbeam; 6. Left front beam reinforcing plate; 7. Right front beam reinforcing plate; 8. Front reinforcing plate of left rear beam; 9. Front reinforcing plate of right rear beam; 10. Rear reinforcing plate of left rear beam; 11. Rear reinforcing plate of right rear beam; 12. Energy-absorbing rib; 13. Side reinforcing plate; 14. Rear swing arm sleeve; 15. Suspension sleeve. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Please see Figures 1-6 This embodiment discloses the following technical content: a novel stamped and welded rear subframe, which adopts a novel stamped and welded structure to solve the problem of local stress concentration in each mounting bracket when the subframe is subjected to alternating loads;

[0024] See attached document Figure 1 The rear subframe is constructed by welding the front tube beam 1 with the left longitudinal beam 2, right longitudinal beam 3, rear crossbeam front plate 4, and rear crossbeam rear plate 5 to form a frame structure. At the frame corners, reinforcement plates 6 (left front beam), 7 (right front beam), 8 (left rear beam front reinforcement plate), 9 (right rear beam front reinforcement plate), 10 (left rear beam rear reinforcement plate), and 11 (right rear beam rear reinforcement plate) are added. These reinforcement plates are designed with a triangular structure based on the principle of triangular stability to improve the strength of the overlapping corners of the beams. Through analysis and calculation, the strength performance of this subframe achieves a service life four times greater than expected.

[0025] See attached document Figure 2 Due to the layout, the rear swing arm mounting point is far from the main structure of the subframe. The load transmitted from the rear swing arm sleeve 14 has a large lever arm and a high risk of stress concentration. Therefore, a side reinforcement plate 13 is designed. The side reinforcement plate 13 adopts a triangular structure and is welded to the front plate 4 of the rear crossbeam, the rear plate 5 of the rear crossbeam, and the right longitudinal beam 3. In order to disperse stress, the side reinforcement plate 13 extends and is welded on the right longitudinal beam 3.

[0026] See attached document Figure 3 The suspension sleeve 15 adopts a flanged structure. When the suspension bushing is press-fitted, the rounded corner of the flange has a guiding function, which facilitates assembly and can prevent the edge from scratching the bushing.

[0027] See attached document Figure 4 The rear crossbeam plate 5 has an inward flange at the front toe arm mounting position. Workers are required to reach in to install bolts. The inward flange can improve the strength around the opening, and the rounded corners can prevent the sharp edges from scratching the arms, ensuring safety.

[0028] See attached document Figure 5 The front plate 4 of the rear crossbeam and the left longitudinal beam 2 are designed with a notch to ensure the fitting length. The front plate 4 of the rear crossbeam and the rear plate 5 of the rear crossbeam together form the rear crossbeam. The overlap between the upper surface of the rear crossbeam and the left longitudinal beam 2 adopts a surface-fitting structure, which can significantly reduce local stress. However, there is a difference in plate thickness between the front plate 4 of the rear crossbeam and the rear plate 5 of the rear crossbeam when they are fastened, so they cannot be fitted to the upper surface of the left longitudinal beam 2 at the same time. The notch can raise the local profile of the rear plate 5 of the rear crossbeam, ensuring that it fits with the left longitudinal beam 2 without interfering with the front plate 4 of the rear crossbeam.

[0029] See attached document Figure 6There is a stress concentration area at the overlap of the rear crossbeam rear plate 5 and the left longitudinal beam 2. Energy-absorbing ribs 12 are designed on the rear crossbeam rear plate 5 to induce local deformation of the rear crossbeam rear plate 5, so that the material stress in the stress concentration area is reduced to the permissible range, ensuring the safety of the subframe.

[0030] The above completes a series of operations for the new stamped and welded rear subframe. Any content not described in detail in this specification is prior art known to those skilled in the art.

[0031] All standard parts used in this utility model can be purchased from the market, and irregular parts can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art, and the circuit connection adopts conventional connection methods in the prior art, which will not be described in detail here.

[0032] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A novel stamped and welded rear subframe, comprising a front tube beam (1), a rear swing arm sleeve (14), and a suspension sleeve (15), characterized in that: The front tube beam (1) is welded together with the left longitudinal beam (2), the right longitudinal beam (3), the front plate of the rear crossbeam (4), and the rear plate of the rear crossbeam (5) to form a frame structure. At the corner of the frame, the left front beam reinforcement plate (6), the right front beam reinforcement plate (7), the left rear beam front reinforcement plate (8), the right rear beam front reinforcement plate (9), the left rear beam rear reinforcement plate (10), and the right rear beam rear reinforcement plate (11) are added. The rear swing arm sleeve (14) is provided with a side reinforcing plate (13). The side reinforcing plate (13) adopts a triangular structure and is welded to the front plate (4) of the rear crossbeam, the rear plate (5) of the rear crossbeam and the right longitudinal beam (3). The side reinforcing plate (13) extends and is welded on the right longitudinal beam (3). The suspension sleeve (15) adopts a flanged structure; The front plate (4) of the rear crossbeam and the rear plate (5) of the rear crossbeam together form the rear crossbeam. The overlap between the rear crossbeam and the upper surface of the left longitudinal beam (2) adopts a surface-fitting structure. Furthermore, a notch is designed at the overlap between the rear crossbeam and the left longitudinal beam (2) to ensure the fitting length. Energy-absorbing ribs (12) are provided on the rear plate (5) of the rear crossbeam.

2. The novel stamped and welded rear subframe according to claim 1, characterized in that: The left front beam reinforcing plate (6), right front beam reinforcing plate (7), left rear beam front reinforcing plate (8), right rear beam front reinforcing plate (9), left rear beam rear reinforcing plate (10), and right rear beam rear reinforcing plate (11) are all set as triangular structures.

3. The novel stamped and welded rear subframe according to claim 1, characterized in that: The rear plate (5) of the rear crossbeam is designed with an inward flange at the front toe arm mounting position.

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