Rear-axle rear-drive automobile rear suspension arrangement structure

Abstract

The utility model provides a rear suspension arrangement structure of a rear axle rear-drive automobile. The rear suspension arrangement structure comprises a rear longitudinal beam, a rear axle assembly, a rear spiral spring and a rear supporting arm assembly. The upper end of the rear spiral spring is fixed on a spring upper fixing seat on the rear longitudinal beam, and the lower end of the rear spiral spring is fixed on a spring lower fixing seat on the rear corbel assembly. The rear supporting arm assembly is fixedly installed on the vehicle body through a lining structure and connected with the rear axle assembly through a bolt. According to the structure, the rear spiral spring is arranged between the vehicle body longitudinal beam and the rear supporting arm assembly, so that the suspension arrangement space is saved, the rear bottom plate and the rear longitudinal beam can move downwards, the space of a rear row seat and the space of a trunk of the vehicle are increased, and the driving comfort of the vehicle is improved. The device is simple in structure and suitable for large-scale production and popularization, and has high practical value.

Description

Technical Field

[0001] The utility model relates to the technical field of automotive suspension systems, and more specifically, to a rear suspension layout structure for a rear-wheel drive vehicle with a rear axle. Background Art

[0002] In the current design of automotive suspension systems, vehicles with a rear-wheel drive (RWD) layout often require special rear suspension designs to balance ride comfort, vehicle handling, and space utilization due to the layout characteristics of their power transmission systems. In the prior art, the rear suspension structure of rear-wheel drive vehicles with a rear axle usually adopts a scheme where coil springs are arranged between the longitudinal beams of the vehicle body and the rear axle. Although this arrangement can provide a certain amount of space for the movement of the rear axle, it also brings several problems:

[0003] Limited rear seat space: Since the rear suspension system needs to leave sufficient layout and movement space at the bottom of the vehicle, the longitudinal beams of the vehicle body and the rear floor usually need to be moved upward relatively. This will directly reduce the available space of the rear seats in the vehicle, making the leg and head space of rear passengers narrow and resulting in a decrease in ride comfort.

[0004] Insufficient trunk space: To ensure the normal working space of the rear suspension, the height of the trunk floor of the vehicle will increase accordingly. This not only affects the vertical space of the trunk but also greatly reduces the convenience of loading, affecting the practical performance of the vehicle.

[0005] Handling stability is affected: The existing rear axle suspension system is prone to bouncing and rolling under complex road conditions, which poses higher requirements for the handling stability of the vehicle. Due to the limitation of the layout space of the existing rear suspension structure, it is difficult to optimize the suspension geometric parameters, thus affecting the stability and comfort of the vehicle during driving.

[0006] Complexity of structural design: The design of traditional rear suspension systems needs to consider various factors, such as the installation position of shock absorbers, the arrangement method of coil springs, and the strength of the vehicle body structure. This complex design process will increase the design and manufacturing costs and also improve the difficulty of later maintenance.

[0007] In response to the above problems, there are already some improved design solutions in the market, such as optimizing space utilization and suspension performance through a multi-link suspension structure or a pneumatic suspension system. However, while these solutions improve performance, they often face problems such as high cost and complex maintenance, and are not suitable for most economy vehicles. Summary of the Utility Model

[0008] In order to solve the above problems, the utility model provides a rear suspension layout structure for a rear-wheel drive vehicle with a rear axle, by rearranging the position of the rear coil spring to increase the interior space of the vehicle and improve the comfort and loading capacity of the vehicle.

[0009] To achieve the above object, the present utility model provides the following technical solutions, mainly including:

[0010] A rear suspension layout structure for a rear-wheel drive vehicle with a rear axle, comprising:

[0011] A rear longitudinal beam, on which a rear coil spring upper fixing seat is provided;

[0012] A rear axle assembly, connected to a rear trailing arm assembly through a bushing structure;

[0013] A rear coil spring, the upper end of which is assembled on the rear coil spring upper fixing seat on the rear longitudinal beam, and the lower end is assembled on the rear coil spring lower fixing seat on the rear trailing arm assembly;

[0014] A rear trailing arm assembly, fixedly installed on the vehicle body through a bushing structure and connected to the rear axle assembly through bolts.

[0015] Preferably, both the rear coil spring upper fixing seat and the rear coil spring lower fixing seat are fixed on the rear longitudinal beam and the rear trailing arm assembly by welding to ensure the stability and reliability of the rear coil spring.

[0016] Preferably, the rear trailing arm assembly is fixedly connected to the vehicle body through a bushing structure and is tightly installed with the rear axle assembly through a bolt structure.

[0017] Preferably, the rear trailing arm assembly includes at least one shock absorber mounting seat for mounting a shock absorber to further improve the shock absorption effect of the rear suspension system.

[0018] Preferably, the bolt connection between the rear longitudinal beam and the rear trailing arm assembly is achieved through high-strength bolts, and the high-strength bolts have shear and tensile strength to ensure the reliability of the connection.

[0019] Preferably, the rear coil spring is made of high-elastic steel material and has good elastic recovery performance to ensure stability and comfort under complex road conditions.

[0020] Preferably, the bushing structure between the rear axle assembly and the rear trailing arm assembly is a replaceable design, which is convenient for maintenance and replacement, and improves the service life and economy of the structure.

[0021] It can be seen from the above technical solutions that compared with the prior art, the present utility model saves the layout space required for the vehicle's rear suspension by redesigned the layout of the rear coil spring, enabling the rear floor and the rear longitudinal beam to move downward, increasing the interior space of the vehicle, thereby improving the comfort and practicality of the vehicle. This design is simple and effective and is suitable for large-scale popularization and application. Brief Description of the Drawings

[0022] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only the embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on the provided drawings.

[0023] Figure 1 It is a three-dimensional structural schematic diagram of the present invention.

[0024] Figure 2 It is a side structural schematic diagram of the present invention.

[0025] Explanation of reference numerals: 1 - rear longitudinal beam, 2 - rear axle assembly, 3 - rear coil spring, 4 - rear trailing arm assembly, 5 - lower fixing seat of rear coil spring, 6 - upper fixing seat of rear coil spring. Specific embodiments

[0026] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of them. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0027] Embodiment

[0028] As Figure 1 and Figure 2 shown, a rear suspension layout structure of a rear-wheel drive vehicle with a rear axle includes a rear longitudinal beam 1, a rear axle assembly 2, a rear coil spring 3, and a rear trailing arm assembly 4.

[0029] Rear longitudinal beam 1: A rear coil spring upper fixing seat 6 is welded on the rear longitudinal beam 1, and this fixing seat is used to fix the upper end of the rear coil spring 3.

[0030] Rear coil spring 3: The upper end of the rear coil spring 3 is fixed to the rear coil spring upper fixing seat 6 on the rear longitudinal beam 1, and the lower end is fixed to the lower fixing seat 5 of the rear trailing arm assembly 4. This layout saves the space required for the rear suspension system, enables the vehicle body longitudinal beam to move downward, and expands the available space for the rear seats and trunk of the vehicle.

[0031] Rear trailing arm assembly 4: The rear trailing arm assembly 4 is fixedly connected to the vehicle body through a bushing structure and is firmly installed on the rear axle assembly 2 through bolts. The rear trailing arm assembly 4 is also provided with a shock absorber mounting seat for installing a shock absorber to further improve the shock absorption performance of the vehicle.

[0032] Rear axle assembly 2: The rear axle assembly 2 is connected to the rear trailing arm assembly 4 through a bushing structure, and the bushing structure is a replaceable design, which is convenient for later maintenance and replacement.

[0033] Material selection and connection method: The rear coil spring 3 is made of high-elastic steel material, which has good elastic recovery performance to ensure stability and comfort under complex road conditions. The bolt connection between the rear longitudinal beam 1 and the rear trailing arm assembly 4 uses high-strength bolts, which have excellent shear and tensile strength to ensure the safety and reliability of the structure.

[0034] Through the above structural design, the utility model effectively solves the problem of limited interior space caused by insufficient layout space of the rear suspension in the prior art, and significantly improves the ride comfort and load-carrying capacity of the vehicle.

[0035] In this specification, each embodiment is described in a progressive manner. The key point of each embodiment is to illustrate the differences from other embodiments. For the same or similar parts among the embodiments, reference can be made to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and reference can be made to the description of the method part for related parts.

[0036] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present utility model. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present utility model. Therefore, the present utility model will not be limited to the embodiments shown herein, but will be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A rear suspension layout structure for a rear-wheel drive vehicle with a rear axle, characterized in that, Comprising: A rear longitudinal beam (1) provided with a rear helical spring upper fixing seat (6) thereon; A rear axle assembly (2) connected to a rear trailing arm assembly (4) through a bushing structure; A rear helical spring (3) with its upper end assembled to the rear helical spring upper fixing seat (6) on the rear longitudinal beam (1) and its lower end assembled to the rear helical spring lower fixing seat (5) on the rear trailing arm assembly (4); A rear trailing arm assembly (4) fixedly installed to the vehicle body through a bushing structure and connected to the rear axle assembly (2) by bolts.

2. The rear suspension layout structure of a rear-wheel drive vehicle with a rear axle as claimed in claim 1, wherein, Both the rear helical spring upper fixing seat (6) and the rear helical spring lower fixing seat (5) are fixed to the rear longitudinal beam (1) and the rear trailing arm assembly (4) by welding to ensure the stability and reliability of the rear helical spring (3).

3. The rear suspension layout structure of the rear-wheel drive vehicle according to claim 2, characterized in that, The rear trailing arm assembly (4) is fixedly connected to the vehicle body through a bushing structure and is fastened to the rear axle assembly (2) through a bolt structure.

4. The rear suspension layout structure of a rear-wheel drive vehicle with a rear axle, according to any one of claims 1 to 3, characterized in that, The rear trailing arm assembly (4) includes at least one shock absorber mounting seat for mounting a shock absorber to further improve the shock absorption effect of the rear suspension system.

5. The rear suspension layout structure of the rear-wheel drive vehicle according to claim 4, characterized in that, The bolt connection between the rear longitudinal beam (1) and the rear trailing arm assembly (4) is achieved by high-strength bolts which have shear and tensile strength to ensure the reliability of the connection.

6. The rear suspension layout structure of a rear-wheel drive vehicle with a rear axle, characterized in that, The rear helical spring (3) is made of high-elastic steel material with good elastic recovery performance to ensure stability and comfort under complex road conditions.

7. The rear suspension layout structure of the rear-wheel drive vehicle according to claim 6, characterized in that, The bushing structure between the rear axle assembly (2) and the rear trailing arm assembly (4) is of a replaceable design, which is convenient for maintenance and replacement, improving the service life and economy of the structure.

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