Torsion beam-like non-independent rear suspension structure for low-speed new energy automobile

Abstract

The utility model discloses a torsion beam-like non-independent rear suspension structure for a low-speed new energy automobile, which relates to the technical field of suspensions and comprises a rear integral axle assembly, two rear shock absorber assemblies and two rear longitudinal towing assemblies. The two rear shock absorber assemblies are hinged to the outer circumferential faces of axle pipes at the two ends of the rear integral axle assembly respectively. The two rear longitudinal dragging assemblies are fixedly installed on the outer circumferential faces of axle pipes at the two ends of the rear integral axle assembly respectively, and the rear shock absorber assembly is formed by integrating a rear shock absorber and a spiral spring into a whole. The number of parts of the rear suspension can be reduced, and the overall cost of the rear suspension and a power assembly is reduced; the rear shock absorber and the spiral spring are integrated, installation procedures are reduced, the front end of the trailing arm rod is provided with a large-size lining, the roll angle rigidity and the lateral rigidity of the rear suspension are increased, use of a stabilizer bar assembly and a transverse thrust rod is reduced, and use of a low-speed new energy automobile is met.

Description

Technical Field

[0001] The utility model relates to the technical field of suspension, and in particular to a torsion beam-like non-independent rear suspension structure for low-speed new energy vehicles. Background Art

[0002] The suspension is an assembly of all force-transmitting connecting devices between the frame and wheels of a car. Its function is to transmit the forces and moments acting between the wheels and the frame, to cushion the impact forces transmitted to the frame or body by uneven roads, and to reduce the vibrations caused thereby, so as to ensure that the car can run smoothly.

[0003] In some vehicle designs, the front overhang is too short to accommodate a front-wheel drive system, requiring the drive system to be placed in the rear overhang. Using a conventional rear torsion beam, powertrain, suspension system, and drive shaft combination would require a large number of components, making layout difficult and resulting in high component costs. Utility Model Content

[0004] In order to solve the technical problems in the existing technology, the utility model provides a torsion beam-like non-independent rear suspension structure for low-speed new energy vehicles, which can reduce the number of rear suspension components, reduce component costs, is easy to install and has fewer installation steps, and can meet the use of low-speed new energy vehicles.

[0005] The technical solution adopted by the utility model to solve its technical problems is: a torsion beam-like non-independent rear suspension structure for low-speed new energy vehicles, including a rear integral axle assembly, a rear shock absorber assembly and a rear longitudinal drag assembly, wherein two rear shock absorber assemblies and two rear longitudinal drag assemblies are respectively hingedly mounted on the outer peripheral surfaces of the bridge tube at both ends of the rear integral axle assembly; the two rear longitudinal drag assemblies are respectively fixedly mounted on the outer peripheral surfaces of the bridge tube at both ends of the rear integral axle assembly, and the rear longitudinal drag assembly is located at the bottom of the corresponding rear shock absorber assembly; the rear shock absorber assembly is integrated with the rear shock absorber and the coil spring.

[0006] Furthermore, the rear shock absorber includes a shock absorber cylinder, a spring base, a spring upper seat and a dust cover. The spring upper seat, spring base and coil spring are all sleeved on the outside of the shock absorber cylinder. The coil spring is connected between the spring upper seat and the spring base. The spring base is fixedly connected to the shock absorber cylinder. The dust cover is sleeved on the outside of the shock absorber cylinder and is located on the inside of the coil spring.

[0007] Furthermore, the rear longitudinal trailing assembly includes a trailing arm, a bushing and a connector. The bushing is fixed to one end of the trailing arm away from the rear integral axle assembly, and the other end of the trailing arm is fixedly connected to the rear integral axle via the connector.

[0008] Furthermore, the connecting member includes an upper connecting plate, a lower connecting plate and a plurality of connecting bolts. The upper connecting plate is fixed to the outer wall of the bridge tube of the rear integral bridge assembly, the lower connecting plate is fixed to the outer wall of the trailing arm rod, and the connecting bolts are passed through and tightened between the upper connecting plate and the lower connecting plate.

[0009] Beneficial effects of the utility model:

[0010] Compared with the conventional rear torsion beam suspension structure, the torsion beam-like non-independent rear suspension structure for low-speed new energy vehicles of the present invention cannot realize the integrated function and needs to be coordinated with the independent powertrain, suspension system and transmission rear axle drive. The present application reduces the number of rear suspension components and reduces the component cost by integrating the rear shock absorber with the coil spring. At the same time, the rear integral axle assembly is used to cooperate with the drive unit to realize power output, and the rear longitudinal dragging assembly with the torsion beam bushing is matched to realize the functions of guiding and bearing lateral force. The rear longitudinal dragging assembly and the rear integral axle assembly are fastened with bolts to realize integrity. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0012] Figure 2 It is a structural diagram for reflecting the connecting piece in the present utility model.

[0013] Figure 3 It is a structural schematic diagram of the rear shock absorber assembly of the utility model.

[0014] In the figure: 1. Rear integral axle assembly; 2. Rear shock absorber assembly; 21. Shock absorber cylinder; 22. Spring base; 23. Spring upper seat; 24. Dust cover; 25. Coil spring; 3. Rear longitudinal trailing assembly; 31. Trailing arm; 32. Bushing; 33. Connector; 331. Upper connecting plate; 332. Lower connecting plate. DETAILED DESCRIPTION

[0015] The present invention will now be described in further detail with reference to the accompanying drawings, which are simplified schematic diagrams that illustrate the basic structure of the present invention in a schematic manner.

[0016] The utility model discloses a torsion beam-like non-independent rear suspension structure for low-speed new energy vehicles.

[0017] Reference Figure 1 and Figure 2A torsion beam non-independent rear suspension structure for low-speed new energy vehicles includes a rear integral bridge assembly 1, a rear shock absorber assembly 2 and a rear longitudinal drag assembly 3. Both the rear shock absorber assembly 2 and the rear longitudinal drag assembly 3 are provided with two, and hinge frames are welded on the bridge tubes at both ends of the rear integral bridge assembly 1. The two rear shock absorber assemblies 2 are respectively hingedly mounted on the outer circumferences of the bridge tubes at both ends of the rear integral bridge assembly 1 through the hinge frames; the two rear longitudinal drag assemblies 3 are respectively fixedly mounted on the outer circumferences of the bridge tubes at both ends of the rear integral bridge assembly 1, and the rear longitudinal drag assembly 3 is located at the bottom of the corresponding rear shock absorber assembly 2; the rear shock absorber assembly 2 is integrated with the rear shock absorber and the coil spring 25.

[0018] Reference Figure 2 and Figure 3 The rear shock absorber includes a shock absorber tube 21, a spring base 22, a spring upper seat 23, and a dust cover 24. The bottom of the shock absorber tube 21 is rotatably connected to the hinge frame. The spring upper seat 23, spring base 22, and coil spring 25 are all sleeved outside the shock absorber tube 21. The coil spring 25 is connected between the spring upper seat 23 and the spring base 22. The spring base 22 is fixedly connected to the shock absorber tube 21. The dust cover 24 is sleeved outside the shock absorber tube 21 and located inside the coil spring 25. By integrating the rear shock absorber and the coil spring 25, it takes up less space, facilitates installation, and reduces the installation process.

[0019] Reference Figure 2 and Figure 3 The rear longitudinal trailing assembly 3 includes a trailing arm 31, a bushing 32, and a connector 33. The bushing 32 is fixed to the end of the trailing arm 31 away from the rear integral axle assembly 1. The other end of the trailing arm is fixedly connected to the rear integral axle via the connector 33. The structural dimensions of the bushing 32 of the rear longitudinal trailing assembly 3 are the same as those of the front bushing 32 of a conventional torsion beam. Consequently, the bushing 32 of the rear longitudinal trailing assembly 3 is relatively large, which increases the rear suspension's roll stiffness and lateral stiffness while reducing the need for stabilizer bar assemblies and lateral thrust rods, meeting the requirements of low-speed new energy vehicles.

[0020] Reference Figure 2 The connector 33 includes an upper connecting plate 331, a lower connecting plate 332, and several connecting bolts. The upper connecting plate 331 is welded to the outer wall of the bridge tube of the rear integral axle assembly 1, and the lower connecting plate 332 is welded to the outer wall of the trailing arm 31. The connecting bolts are threaded and tightened between the upper connecting plate 331 and the lower connecting plate 332. In some embodiments, the rear longitudinal trailing assembly 3 and the rear integral axle assembly 1 can also be connected using leaf springs or U-bolts.

[0021] Compared with the conventional rear torsion beam, the present application cannot realize the integrated function and needs to cooperate with the independent powertrain, suspension system and transmission rear axle drive. The present application reduces the number of rear suspension components and reduces the component cost by integrating the rear shock absorber and the coil spring 25 into the rear shock absorber assembly; at the same time, the rear integral bridge assembly 1 is used to cooperate with the drive unit to realize power output, and the rear longitudinal drag assembly 3 with the torsion beam bushing is matched to realize the functions of guiding and bearing lateral force, etc. The rear longitudinal drag assembly 3 and the rear integral bridge assembly 1 are fastened with bolts to realize integrity.

[0022] Based on the above-mentioned ideal embodiment of the present invention, and in accordance with the above description, relevant personnel can make various changes and modifications without departing from the technical scope of the present invention. The technical scope of the present invention is not limited to the content of the specification, but must be determined according to the scope of the claims.

Claims

1. A torsion beam-like non-independent rear suspension structure for low-speed new energy vehicles, characterized by: The invention comprises a rear integral bridge assembly (1), a rear shock absorber assembly (2) and a rear longitudinal drag assembly (3), wherein two rear shock absorber assemblies (2) and two rear longitudinal drag assemblies (3) are provided, and the two rear shock absorber assemblies (2) are respectively hingedly mounted on the outer peripheral surfaces of the bridge tubes at both ends of the rear integral bridge assembly (1); the two rear longitudinal drag assemblies (3) are respectively fixedly mounted on the outer peripheral surfaces of the bridge tubes at both ends of the rear integral bridge assembly (1), and the rear longitudinal drag assemblies (3) are located at the bottom of the corresponding rear shock absorber assembly (2); the rear shock absorber assembly (2) is formed by integrating the rear shock absorber and the coil spring (25).

2. The torsion beam-like non-independent rear suspension structure for a low-speed new energy vehicle according to claim 1, characterized in that: The rear shock absorber comprises a shock absorber cylinder (21), a spring base (22), a spring upper seat (23) and a dust cover (24); the spring upper seat (23), the spring base (22) and the coil spring (25) are all sleeved outside the shock absorber cylinder (21); the coil spring (25) is connected between the spring upper seat (23) and the spring base (22); the spring base (22) is fixedly connected to the shock absorber cylinder (21); the dust cover (24) is sleeved outside the shock absorber cylinder (21) and is located inside the coil spring (25).

3. The torsion beam-like non-independent rear suspension structure for a low-speed new energy vehicle according to claim 1 or 2, characterized in that: The rear longitudinal towing assembly (3) comprises a towing arm (31), a bushing (32) and a connecting piece (33); the bushing (32) is fixed to one end of the towing arm (31) away from the rear integral bridge assembly (1); the other end of the towing arm (31) is fixedly connected to the rear integral bridge via the connecting piece (33).

4. The torsion beam-like non-independent rear suspension structure for a low-speed new energy vehicle according to claim 3, characterized in that: The connecting member (33) includes an upper connecting plate (331), a lower connecting plate (332) and a plurality of connecting bolts. The upper connecting plate (331) is fixed to the outer wall of the bridge tube of the rear integral bridge assembly (1), the lower connecting plate (332) is fixed to the outer wall of the trailing arm (31), and the connecting bolts are passed through and tightened between the upper connecting plate (331) and the lower connecting plate (332).

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