Non-independent rear suspension

Abstract

The utility model discloses a non - independent rear suspension, including rear drive axle, and the both ends are provided with drive wheel respectively, mounting frame is fixedly connected in the rear drive axle bottom, drags arm, and one end fixedly connected in the mounting frame bottom, and the other end of drags arm and car body bottom hinged connection, damper, lower end and mounting frame hinged connection, damper upper end and car body bottom hinged connection, spiral spring, lower end card in the rear drive axle upper portion, spiral spring upper end and car body bottom card joint connection. Compared with prior art, the beneficial effects of the utility model are: through spiral spring upper and lower ends directly carding between rear drive axle and car body, need not bolt or special press -fitting tool, lower spring washer, upper spring washer and the self - contained insertion rod can form axial positioning by inserting spring end portion.

Description

Technical Field

[0001] This utility model relates to the field of electric vehicle rear suspension technology, and in particular to a non-independent rear suspension. Background Technology

[0002] The rear axle suspension effectively connects the vehicle body to the tires, serving to absorb shocks and bear loads.

[0003] The rear axle suspension structure on the market is complex. In the existing rear axle suspension system, the installation and replacement of coil springs require the use of special spring compression tools or the cooperation of multiple people. After the spring is compressed, it is aligned with the upper and lower supports and then bolts are inserted and tightened. The process is complicated and time-consuming. Utility Model Content

[0004] The purpose of this utility model is to provide a non-independent rear suspension to overcome the shortcomings of the prior art mentioned in the background section.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a rear drive axle with drive wheels at both ends; a mounting bracket fixedly connected to the bottom of the rear drive axle; a towing arm, one end of which is fixedly connected to the bottom of the mounting bracket, and the other end of which is hinged to the bottom of the vehicle body; a damper, the lower end of which is hinged to the mounting bracket, and the upper end of which is hinged to the bottom of the vehicle body; and a coil spring, the lower end of which is engaged with the upper part of the rear drive axle, and the upper end of which is engaged with the bottom of the vehicle body.

[0006] Preferably, a lower spring washer is provided on the upper part of the rear drive axle, and a lower insertion rod is provided on the upper part of the lower spring washer. An upper spring washer is provided on the bottom of the vehicle body, and an upper insertion rod is provided on the lower part of the upper spring washer. The lower insertion rod and the upper insertion rod are respectively inserted into both ends of the coil spring.

[0007] Preferably, the upper spring washer and the lower spring washer are respectively pressed onto both ends of the helical spring.

[0008] Preferably, an extension rod is provided on one side of the rear drive axle, and a stabilizer rod is hinged to the extension rod. The stabilizer rod is hinged to the extension rod.

[0009] Preferably, the end of the drag arm connected to the mounting bracket is provided with two connecting holes, and the mounting bracket is provided with two mounting shafts that match the connecting holes, with the connecting holes fitted onto the mounting shafts.

[0010] Preferably, a bushing is fitted onto the mounting shaft, and the connecting hole is fitted onto the bushing.

[0011] Preferably, the bushing has a buffer hole, and a plurality of buffer holes are arranged around the axis of the bushing.

[0012] Preferably, the bushing is made of rubber.

[0013] Preferably, a drive motor is provided on the side of the rear drive axle.

[0014] Preferably, the buffer hole has an arc-shaped structure, and the inner sidewall of the buffer hole is provided with a buffer protrusion.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] The coil spring is directly clamped between the rear drive axle and the vehicle body at both ends, without the need for bolts or special pressing tools; the lower and upper spring washers have built-in insertion rods, which can be inserted into the ends of the springs to form axial positioning.

[0017] By hinged at the upper end to the vehicle body and at the lower end to the mounting bracket, the coil spring can be secured between the vehicle body and the rear drive axle, effectively simplifying the assembly process. In addition, the damper can also reduce shocks, improving the stability and comfort of the vehicle. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the non-independent rear suspension structure of this utility model.

[0019] Figure 2 This is a schematic diagram of the side structure of the non-independent rear suspension of this utility model.

[0020] Figure 3 This is a schematic diagram of the non-independent rear suspension structure of this utility model from a low angle.

[0021] Figure 4 This is a schematic diagram of the non-independent rear suspension trailing arm structure of this utility model.

[0022] Figure 5 This is a schematic diagram of the cross-sectional structure of the non-independent rear suspension trailing arm of this utility model.

[0023] In the diagram: 100, rear drive axle; 101, drive wheel; 103, vehicle body; 104, drive motor; 200, mounting bracket; 201, mounting shaft; 202, bushing; 203, buffer hole; 204, buffer protrusion; 300, towing arm; 301, connecting hole; 400, damper; 500, coil spring; 501, lower spring washer; 502, lower insert rod; 503, upper spring washer; 504, upper insert rod; 600, extension rod; 601, stabilizer bar. Detailed Implementation

[0024] 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.

[0025] See appendix Figure 1 To be continued Figure 5 The non-independent rear suspension includes: a rear drive axle 100 with drive wheels 101 at both ends; a mounting bracket 200 fixedly connected to the bottom of the rear drive axle 100; a trailing arm 300, one end of which is fixedly connected to the bottom of the mounting bracket 200, and the other end of which is hinged to the bottom of the vehicle body 103; a damper 400, the lower end of which is hinged to the mounting bracket 200, and the upper end of which is hinged to the bottom of the vehicle body 103; and a coil spring 500, the lower end of which is engaged with the upper part of the rear drive axle 100, and the upper end of which is engaged with the bottom of the vehicle body 103.

[0026] Thus, the rear drive axle 100 has a rod-like structure, which drives the wheels. The drive wheels 101 at both ends of the rear drive axle 100 drive the vehicle body 103. The mounting bracket 200 is fixedly connected to the rear drive axle 100. The bottom of the mounting bracket 200 is fixedly connected to one end of the trailing arm 300, and the other end of the trailing arm 300 is hinged to the bottom of the vehicle body 103. This structure of the trailing arm 300 allows for a hinged connection between the rear drive axle 100 and the vehicle body 103. The lower end of the damper 400 is hinged to the mounting bracket 200, and the upper end of the damper 400 is hinged to the bottom of the vehicle body 103. This provides buffering resistance during vehicle body 103 operation, reduces vibration transmission, and improves driving stability. Furthermore, the vehicle body 103 is pressed against the rear drive axle 100 by the damper 400. To reduce the impact of road bumps on the vehicle body 103, the lower end of the coil spring 500 is secured to the upper part of the rear drive axle 100, while the upper end of the coil spring 500 is engaged with the bottom of the vehicle body 103. This allows the coil spring 500 to provide elastic support to the vehicle body 103. The coil spring 500's engagement between the upper part of the rear drive axle 100 and the bottom of the vehicle body 103 facilitates its installation and removal. The damper 400 limits the distance between the vehicle body 103 and the rear drive axle 100, pressing the coil spring 500 between them to prevent it from detaching and improving the overall structural stability and safety. The combined use of the coil spring 500 and the damper 400 allows the vehicle body 103 to effectively absorb impacts from the ground during driving, thereby improving ride comfort and handling performance. In addition, since the helical spring 500 is fixed by a snap-fit ​​method, it is easy to replace and maintain, thus reducing the cost of use.

[0027] Optionally, a lower spring washer 501 is provided on the upper part of the rear drive axle 100, a lower insertion rod 502 is provided on the upper part of the lower spring washer 501, an upper spring washer 503 is provided on the bottom of the vehicle body 103, and an upper insertion rod 504 is provided on the lower part of the upper spring washer 503. The lower insertion rod 502 and the upper insertion rod 504 are respectively inserted into both ends of the coil spring 500.

[0028] In this way, the two ends of the helical spring 500 are respectively positioned between the lower spring washer 501 and the upper spring washer 503. The lower spring washer 501 and the upper spring washer 503 can provide stable support for the helical spring 500. At the same time, the lower insertion rod 502 and the upper insertion rod 504 are respectively inserted into the two ends of the helical spring 500. This can effectively prevent the helical spring 500 from shifting or falling off during installation and use.

[0029] Optionally, the upper spring washer 503 and the lower spring washer 501 are respectively pressed onto both ends of the helical spring 500.

[0030] In this way, the helical spring 500 is tightly pressed together by the upper spring washer 503 and the lower spring washer 501. The outer diameters of the upper spring washer 503 and the lower spring washer 501 are larger than the outer diameter of the helical spring 500, which can effectively increase the contact area between the helical spring 500 and the upper spring washer 503 and the lower spring washer 501, ensuring the uniformity of force at both ends of the helical spring 500 and avoiding spring deformation or damage caused by local stress concentration.

[0031] Optionally, an extension rod 600 is provided on one side of the rear drive axle 100, and a stabilizer rod 601 is hinged to the extension rod 600. The stabilizer rod 601 is hinged to the extension rod 600.

[0032] In this way, a stabilizer bar 601 is hinged to the extension rod 600 on one side of the rear drive axle 100. The extension rod 600 is perpendicular to the rear drive axle 100. The stabilizer bar 601 is hinged to the extension rod 600. The stabilizer bar 601 is hinged to the extension rod 600. The stabilizer bar 601 is hinged to rotate around the length axis of the extension rod 600. The other end of the stabilizer bar 601 is hinged to the vehicle body 103. In this way, the connection between the stabilizer bar 601 and the vehicle body 103 can effectively improve the connection stability between the rear drive axle 100 and the vehicle body 103.

[0033] Optionally, the end of the drag arm 300 connected to the mounting bracket 200 is provided with two connecting holes 301, and the mounting bracket 200 is provided with two mounting shafts 201 that match the connecting holes 301, and the connecting holes 301 are sleeved on the mounting shafts 201.

[0034] In this way, the towing arm 300 and the mounting bracket 200 are connected through the cooperation of two connecting holes 301 and the mounting shaft 201. This can securely connect the towing arm 300 and the mounting bracket 200. At the same time, the design of the two connecting holes 301 and the mounting shaft 201 can effectively distribute the force on the connection parts and avoid structural damage due to excessive force on a single connection point, thereby improving the overall stability and durability of the connection.

[0035] Optionally, a bushing 202 is fitted onto the mounting shaft 201, and the connecting hole 301 is fitted onto the bushing 202.

[0036] In this way, the mounting shaft 201 and the connecting hole 301 are fitted together by the bushing 202. The bushing 202 can effectively reduce the friction between the mounting shaft 201 and the connecting hole 301, and the bushing 202 can also play a role in buffering and shock absorption, further improving the stability of the connection between the towing arm 300 and the mounting bracket 200. The bushing 202 can effectively compensate for the gap between the mounting shaft 201 and the connecting hole 301, ensuring the tightness of the connection, while reducing the risk of wear caused by vibration or impact, thereby extending the service life of the overall structure.

[0037] Optionally, the bushing 202 is provided with a buffer hole 203, and a plurality of buffer holes 203 are arranged around the axis of the bushing 202.

[0038] In this way, the design of the buffer hole 203 can further improve the vibration damping performance of the bushing 202. Multiple buffer holes 203 are evenly distributed around the axis of the bushing 202, so that when the bushing 202 is subjected to external force, the stress can be reasonably distributed through the buffer hole 203, avoiding excessive local stress that could lead to material fatigue or deformation.

[0039] Optionally, the bushing 202 is made of rubber.

[0040] In this way, the rubber material has good elasticity and wear resistance, which can effectively absorb vibration and impact while ensuring connection strength, further improving the vibration reduction and noise reduction performance of bushing 202.

[0041] Optionally, a drive motor 104 is provided on the side of the rear drive axle 100.

[0042] In this way, the drive motor 104 is fixedly connected to the rear drive axle 100, and the drive motor 104 can drive the drive wheel 101 on the rear drive axle 100 to rotate, thereby providing power output to the vehicle.

[0043] Optionally, the buffer hole 203 has an arc-shaped structure, and the inner wall of the buffer hole 203 is provided with a buffer protrusion 204.

[0044] In this way, the arc-shaped buffer hole 203 can better adapt to the distribution of external forces, allowing stress to be transmitted more evenly to all parts of the bushing 202, thereby effectively improving the fatigue resistance of the bushing 202. The design of the buffer protrusion 204 can further enhance the buffering effect of the bushing 202. During the stress process, it absorbs more vibration energy through local deformation, reducing the impact force transmitted to the connection structure, thereby improving the overall stability and durability of the connection. Thus, the buffer protrusion 204 can generate local elastic deformation when the bushing 202 is under stress, thereby effectively absorbing and dispersing vibration energy, further reducing the risk of fatigue damage to the connection structure caused by continuous vibration, and improving the adaptability and service life of the bushing 202 under complex working conditions.

[0045] The above description is only a preferred embodiment of the present utility model. It should be noted that, for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of the present utility model, and these improvements and substitutions are all considered to be within the protection scope of the present utility model.

Claims

1. A non-independent rear suspension, characterized in that, include: The rear drive axle (100) has drive wheels (101) at both ends. Mounting bracket (200) is fixedly connected to the bottom of the rear drive axle (100); A towing arm (300) has one end fixedly connected to the bottom of the mounting bracket (200), and the other end of the towing arm (300) is hinged to the bottom of the vehicle body (103); The damper (400) is hinged at its lower end to the mounting bracket (200) and at its upper end to the bottom of the vehicle body (103). A helical spring (500) is attached at its lower end to the upper part of the rear drive axle (100), and the upper end of the helical spring (500) is connected to the bottom of the vehicle body (103).

2. A non-independent rear suspension according to claim 1, characterized in that, The rear drive axle (100) is provided with a lower spring washer (501) on the upper part, and a lower insertion rod (502) is provided on the upper part of the lower spring washer (501). The bottom of the vehicle body (103) is provided with an upper spring washer (503), and an upper insertion rod (504) is provided on the lower part of the upper spring washer (503). The lower insertion rod (502) and the upper insertion rod (504) are respectively inserted into both ends of the coil spring (500).

3. A non-independent rear suspension according to claim 2, characterized in that, The upper spring washer (503) and the lower spring washer (501) are respectively pressed onto both ends of the helical spring (500).

4. A non-independent rear suspension according to claim 1, characterized in that, An extension rod (600) is provided on one side of the rear drive axle (100), and a stabilizer rod (601) is hinged on the extension rod (600). The stabilizer rod (601) is hinged on the extension rod (600).

5. A non-independent rear suspension according to claim 1, characterized in that, The drag arm (300) is connected to the mounting bracket (200) at one end with two connecting holes (301). The mounting bracket (200) is provided with two mounting shafts (201) that match the connecting holes (301). The connecting holes (301) are sleeved on the mounting shafts (201).

6. A non-independent rear suspension according to claim 5, characterized in that, A bushing (202) is fitted on the mounting shaft (201), and the connecting hole (301) is fitted on the bushing (202).

7. A non-independent rear suspension according to claim 6, characterized in that, The bushing (202) has a buffer hole (203), and a plurality of the buffer holes (203) are arranged around the axis of the bushing (202).

8. A non-independent rear suspension according to claim 6, characterized in that, The bushing (202) is made of rubber.

9. A non-independent rear suspension according to claim 1, characterized in that, A drive motor (104) is provided on the side of the rear drive axle (100).

10. A non-independent rear suspension according to claim 7, characterized in that, The buffer hole (203) has an arc-shaped structure, and the inner sidewall of the buffer hole (203) is provided with a buffer protrusion (204).

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