Suspension rear support structure

Abstract

The utility model relates to the technical field of automobile spare parts, and discloses a suspension rear support structure which comprises a support body, the support body is of an L-shaped structure, the support body serves as a core bearing part, the L-shaped structure is adopted, and space layout and force transmission optimization are achieved. The first contact surface forms a flat joint surface through precision machining to ensure gapless fit with a driving motor, the second contact surface is subjected to special surface treatment to enhance the friction coefficient with the frame longitudinal beam, and the heat dissipation holes are arranged in a streamline array to promote air convection and reduce the risk of heat accumulation. The design that the L-shaped structure of the support body is matched with the reinforcing ribs on the outer side effectively disperses stress concentration, the risk of casting shrinkage cavities is remarkably reduced through large chamfering treatment, the rigidity of key connecting points is improved through local thickening of the boss structure, the overall anti-resonance capacity is improved compared with a traditional welding piece, and the service life of a driving motor and frame connecting system is greatly prolonged.

Description

Technical Field

[0001] This utility model relates to the field of automotive parts technology, specifically to a rear suspension bracket structure. Background Technology

[0002] The rear suspension bracket of a car is a key load-bearing component that connects the engine mounting system to the car body. It is mainly used to absorb engine vibration and transfer load.

[0003] Traditional rear suspension brackets are made by cutting and welding sections of Q235 steel plate, which has three major technical defects: First, the multi-process welding leads to a complex production process (requiring six processes such as material cutting, bending, and positioning welding), increasing the cost per unit; Second, stress concentration is prone to occur in the weld area, and bench tests show that its fatigue life is only 80,000 cycles, which is lower than the industry standard requirement of 120,000 cycles; Third, welding thermal deformation leads to large fluctuations in the tolerance of key mounting holes, affecting the NVH performance of the entire vehicle. Utility Model Content

[0004] (a) Technical problems to be solved

[0005] The purpose of this utility model is to provide a rear suspension support structure to solve the problem of poor structural strength of traditional rear suspension support products mentioned in the background art.

[0006] (II) Technical Solution

[0007] To achieve the above objectives, this utility model provides the following technical solution: a rear suspension bracket structure, comprising a bracket body, the bracket body being an L-shaped structure, a first contact surface for engaging with a drive motor being provided on the inner side of the short side of the bracket body, and a second contact surface for engaging with the longitudinal beam of the vehicle frame being provided on the outer side of the long side of the bracket body, heat dissipation holes being provided on the bracket body, and a boss being fixedly provided on the outer side of the long side of the bracket body. The bracket body, as a core load-bearing component, adopts an L-shaped structure to optimize spatial layout and force transmission. The first contact surface is precision machined to form a flat mating surface to ensure a gapless fit with the drive motor. The second contact surface undergoes special surface treatment to enhance the coefficient of friction with the longitudinal beam of the vehicle frame. The heat dissipation holes are arranged in a streamlined array to promote air convection and reduce the risk of heat accumulation. The boss is locally thickened to improve the deformation resistance of the bolt connection area.

[0008] Preferably, the boss has four first screw holes, and the first screw holes are provided with first bolts for connecting the drive motor. The first screw holes adopt a stepped thread structure to enhance the bolt engagement strength.

[0009] Preferably, a reinforcing rib is fixedly provided at the outer edge of the support body, and a chamfer is fixedly provided at the edge of the support body. The reinforcing rib makes the stress distribution more uniform, and the rounded transition of the chamfer eliminates stress concentration points.

[0010] Preferably, a second screw hole is provided on the short side of the bracket body, and a second bolt for connecting the longitudinal beam of the vehicle frame is fixedly installed inside the second screw hole. The second screw hole has a built-in copper bushing to prevent thread wear, and the second bolt is equipped with an anti-reverse washer to cope with the bumpy conditions of the vehicle.

[0011] Compared with the prior art, the beneficial effects of this utility model are:

[0012] 1. The structure of this rear suspension bracket has been comprehensively improved in terms of structural strength. The L-shaped structure of the main body of the bracket, combined with the outer reinforcing rib design, effectively disperses stress concentration. The large chamfer treatment significantly reduces the risk of casting shrinkage. The boss structure improves the rigidity of key connection points through local thickening. The overall anti-resonance capability is improved compared with traditional welded parts, and the service life of the drive motor and frame connection system is greatly extended.

[0013] 2. The rear suspension bracket structure adopts CNC integrated machining technology to replace the traditional segmented welding process, which solves the cumulative tolerance problem caused by the traditional process and ensures the assembly consistency between the drive motor and the frame longitudinal beam;

[0014] 3. The suspended rear support structure features a heat dissipation hole layout optimized by fluid dynamics to reduce the motor's operating temperature. The boss structure reduces ineffective machining surfaces while ensuring strength, and the chamfer design combines manufacturability and functionality, facilitating demolding and improving stress distribution. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of the suspension support structure of this utility model;

[0016] Figure 2 This is a front view of the suspension support structure of this utility model;

[0017] Figure 3 This is a side view of the suspension rear support structure of this utility model;

[0018] Figure 4 This is a rear view of the suspension support structure of this utility model;

[0019] Figure 5 This is a top view of the suspension rear support structure of this utility model.

[0020] In the figure: 1. Support body; 2. First contact surface; 3. Second contact surface; 4. Heat dissipation hole; 5. Boss; 6. First screw hole; 7. First bolt; 8. Reinforcing rib; 9. Chamfer; 10. Second screw hole; 11. Second bolt. Detailed Implementation

[0021] 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.

[0022] Please see Figures 1-5 This utility model provides a technical solution: a rear suspension bracket structure, which includes a bracket body 1, which is an L-shaped structure. The inner side of the short side of the bracket body 1 is provided with a first contact surface 2 for connecting with the drive motor, and the outer side of the long side of the bracket body 1 is provided with a second contact surface 3 for connecting with the longitudinal beam of the vehicle frame. The bracket body 1 is provided with heat dissipation holes 4, and a boss 5 is fixedly provided on the outer side of the long side of the bracket body 1. The bracket body 1, as a basic load-bearing structure, achieves multi-directional load transfer through L-shaped geometric design. The first contact surface 2 is precision milled to form a high-precision plane to ensure effective transmission of vibration energy with the drive motor. The second contact surface 3 is shot-peened to enhance the reliability of dynamic connection with the longitudinal beam of the vehicle frame. The heat dissipation holes 4 are optimized by computational fluid dynamics to accelerate heat convection and reduce the operating temperature of the motor. The hollow design of the heat dissipation holes reduces the overheating of the motor and reduces performance degradation. The boss 5 serves as a local reinforcement structure to concentrate the preload of the bolts and reduce overall material consumption.

[0023] The boss 5 has four first screw holes 6. The first screw holes 6 are provided with first bolts 7 for connecting the drive motor. The outer edge of the bracket body 1 is fixed with reinforcing ribs 8. The first screw holes 6 adopt a blind hole design and are equipped with sealing grooves to prevent corrosive media from entering the threads. The reinforcing ribs 8 improve the bending stiffness of the key area.

[0024] A chamfer 9 is fixedly provided at the edge of the bracket body 1, and a second screw hole 10 is provided on the short side of the bracket body 1. A second bolt 11 for connecting the longitudinal beam of the frame is fixedly provided inside the second screw hole 10. The chamfer 9 reduces the problem of shrinkage in casting and facilitates demolding.

[0025] Working principle: The rear suspension bracket structure optimizes the spatial layout through the L-shaped structure of the bracket body 1. The first contact surface 2 on the inner side of its short side is in close contact with the drive motor, and the second contact surface 3 on the outer side of the long side is firmly connected to the longitudinal beam of the frame. The heat dissipation holes 4 on the bracket body 1 effectively improve the heat dissipation efficiency of the motor. The boss 5 on the outer side of the long side and its four first screw holes 6, together with the first bolt 7, achieve precise positioning and fixation of the drive motor. The reinforcing ribs 8 and chamfers 9 on the outer edge of the bracket body 1 significantly improve the overall structural strength and anti-resonance performance. The second screw hole 10 at the short side, through the second bolt 11, ensures the reliable installation of the longitudinal beam of the frame. Compared with the traditional welding process, this structure uses CNC machining to improve dimensional stability. The design of the reinforcing ribs 8 and chamfers 9 reduces the risk of resonance damage. The heat dissipation holes 4 lower the operating temperature of the motor. The boss 5 reduces the machining area. The chamfers 9 effectively solve the problem of casting shrinkage and improve demolding efficiency.

[0026] Finally, it should be noted that the above content is only used to illustrate the technical solution of this utility model, and is not intended to limit the scope of protection of this utility model. Simple modifications or equivalent substitutions made by those skilled in the art to the technical solution of this utility model do not depart from the essence and scope of the technical solution of this utility model.

Claims

1. A rear suspension support structure, the rear suspension support structure comprising a support body (1), characterized in that: The bracket body (1) has an L-shaped structure. The inner side of the short side of the bracket body (1) is provided with a first contact surface (2) for connecting with the drive motor. The outer side of the long side of the bracket body (1) is provided with a second contact surface (3) for connecting with the longitudinal beam of the vehicle frame. The bracket body (1) is provided with heat dissipation holes (4). The outer side of the long side of the bracket body (1) is fixedly provided with a boss (5).

2. The suspension rear support structure according to claim 1, characterized in that: The boss (5) has four first screw holes (6), and the first screw holes (6) are provided with first bolts (7) for connecting the drive motor.

3. The suspension rear support structure according to claim 1, characterized in that: A reinforcing rib (8) is fixedly provided at the outer edge of the support body (1), and a chamfer (9) is fixedly provided at the edge of the support body (1).

4. The suspension rear support structure according to claim 1, characterized in that: The bracket body (1) has a second screw hole (10) on its short side, and a second bolt (11) for connecting the longitudinal beam of the frame is fixedly installed inside the second screw hole (10).

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