An adjustable progressive rear suspension system

Abstract

The utility model belongs to the technical field of vehicle damping system relates to an adjustable progressive rear damping system, the car frame, the side of car frame is provided with first hinged point, second hinged point and third hinged point from top to bottom, rear rocker arm, the front end of rear rocker arm is hinged with third hinged point, and the upper portion of rear rocker arm is integrally formed with lower rocker arm mounting seat, lower rocker arm, the middle part of lower rocker arm is hinged on lower rocker arm mounting seat, shock absorber, the upper end of shock absorber is hinged with first hinged point, and the front end of lower rocker arm is hinged with lower end, adjustable connecting rod assembly, the adjustable connecting rod assembly includes the first adjustable connecting rod and the second adjustable connecting rod of symmetrical setting in the left and right sides of shock absorber, and the front end of first adjustable connecting rod and second adjustable connecting rod is hinged with second hinged point, and the rear end is hinged with the rear end of lower rocker arm. The adjustable progressive rear damping system provided by the utility model changes the length of connecting rod, and the damping performance of damping system can be fully played.

Description

Technical Field

[0001] This utility model belongs to the technical field of vehicle shock absorption systems, and relates to an adjustable progressive rear shock absorption system. Background Technology

[0002] For off-road motorcycles, a high-performance shock absorption system is required. Traditional rear shock absorbers use a linear damping design, which has limited cushioning effect. Especially under strong impacts, they are prone to reaching their compression limit, leading to insufficient damping or support. In addition, traditional shock absorption systems have the following drawbacks: the linkage structure of the rear shock absorber experiences concentrated stress, which can easily lead to metal fatigue or loosening of the connection points over long-term use; the fixed installation angle of the shock absorber makes it unable to adapt to different road conditions, and the shock travel is limited by the wheel sway amplitude.

[0003] Chinese utility model CN106005203A (publication date: October 12, 2016) discloses a compact rear suspension structure for a two-wheeled vehicle, including a frame, a swingarm, a shock absorber, a rocker arm tie rod, and a shock absorber rocker arm. The frame has two rearwardly extending and left-right aligned support rods, the swingarm has two left-right aligned fork arms connected to the rear wheel, and the rear end of each support rod is connected to a corresponding fork arm. The front end of the rocker arm tie rod is hinged to the bottom rear end of the frame, and the top of the shock absorber rocker arm is hinged to the swingarm. One end of the shock absorber is hinged to the top rear end of the frame, and the other end of the shock absorber is hinged to the bottom of the shock absorber rocker arm. Each fork arm has a through hole at its front end, and at least one bearing is embedded in the through hole. Each fork arm and a corresponding support rod are connected by bolts passing through the bearings; the two bolts are axially aligned.

[0004] The aforementioned compact rear suspension structure improves upon the shortcomings of traditional shock absorption systems, but there is still room for optimization in terms of product adaptability. Utility Model Content

[0005] This invention addresses the shortcomings of existing technologies by providing an adjustable progressive rear shock absorption system. By changing the length of the connecting rod, it can adapt to more needs and allow the shock absorption performance of the system to be fully utilized.

[0006] To solve the above-mentioned technical problems, the objective of this utility model is achieved through the following technical solution:

[0007] An adjustable progressive rear damping system includes:

[0008] The vehicle frame has a first hinge point, a second hinge point, and a third hinge point arranged on its side from top to bottom;

[0009] The rear rocker arm has its front end hinged to the third hinge point, and a lower rocker arm mounting base is integrally formed on the upper part of the rear rocker arm.

[0010] The lower rocker arm is hinged at its middle section to the lower rocker arm mounting base;

[0011] A shock absorber, wherein the upper end of the shock absorber is hinged to the first hinge point and the lower end is hinged to the front end of the lower rocker arm;

[0012] An adjustable linkage assembly includes a first adjustable linkage and a second adjustable linkage symmetrically arranged on the left and right sides of the shock absorber. The front ends of the first and second adjustable linkages are hinged to a second hinge point, and the rear ends are hinged to the rear end of the lower rocker arm.

[0013] The lower rocker arm, shock absorber, and adjustable linkage assembly form a triangular support and shock absorption structure connecting the frame and the rear rocker arm.

[0014] In the aforementioned adjustable progressive rear damping system, the adjustable link adopts a conventional structure in the art, such as an adjustable link whose effective length can be adjusted via a threaded connection system.

[0015] In the aforementioned adjustable progressive rear shock absorber system, a spacer is provided inside the second hinge point, and the front ball joints of the first and second adjustable links are respectively connected to the two ends of the spacer and locked by pins.

[0016] In the aforementioned adjustable progressive rear shock absorber system, the rear end of the lower rocker arm is provided with a longitudinally extending rear connecting tube, and the rear ball joints of the first and second adjustable connecting rods are respectively connected to the two ends of the rear connecting tube and locked by pins.

[0017] In the aforementioned adjustable progressive rear shock absorber system, the first adjustable link and the second adjustable link are inclined inward from front to back.

[0018] In the aforementioned adjustable progressive rear shock absorber system, a clearance space is formed between the first adjustable link and the second adjustable link when the shock absorber moves up and down. The shock absorber passes through the clearance space and is hinged to the lower rocker arm.

[0019] In the aforementioned adjustable progressive rear shock absorber system, the lower rocker arm mounting base is hinged to the shaft hole of the lower rocker arm via a hinge assembly. The hinge assembly includes a pin, a bushing, and a bearing. The pin passes through the lower rocker arm mounting base and the shaft hole, the bushing is sleeved on the pin, and the bearing is disposed between the bushing and the wall of the shaft hole.

[0020] In the aforementioned adjustable progressive rear damping system, the bearing of the hinge assembly is preferably a high-strength needle roller bearing, such as an SKF HK2220 bearing; the bearings of the hinge assembly are arranged in pairs and distributed on the left and right; the pin of the hinge assembly passes through the shaft hole and is locked by a nut.

[0021] In the aforementioned adjustable progressive rear shock absorber system, the rear end of the lower rocker arm is provided with a rear connecting tube that is hinged to the first and second adjustable connecting rods, the middle part is provided with a shaft hole that is hinged to the lower rocker arm mounting seat, and the front end is provided with a front fork that is hinged to the shock absorber. The center line connecting the rear connecting tube and the shaft hole forms an angle with the center line connecting the front fork and the shaft hole. The included angle makes the lower rocker arm have a structure with the lowest part in the middle and the two ends raised. The included angle is preferably 100°-120°.

[0022] Compared with the prior art, this utility model has the following advantages:

[0023] 1. This utility model provides an adjustable progressive rear shock absorber system. By adjusting the effective length of the connecting rod assembly, the lever ratio and motion trajectory of the entire linkage mechanism can be adjusted. This causes the relationship between the force and stroke experienced by the shock absorber during compression to change. Users can flexibly adjust different characteristics of the shock absorber system according to load, road conditions, or driving style.

[0024] 2. This invention utilizes an adjustable linkage assembly and a lower rocker arm with central constraint and movable ends to form a multi-stage linkage system, resulting in a shock absorption system with more efficient shock absorption performance and a more linear damping design. This invention forms a triangular support shock absorption structure connecting the frame and the rear rocker arm through the adjustable linkage assembly, lower rocker arm, and shock absorber, providing more efficient cushioning performance, optimizing the force transmission path, and reducing metal fatigue. This invention further improves the hinge structure, reducing friction loss and extending service life. Attached Figure Description

[0025] Figure 1 This is a perspective view of the present invention;

[0026] Figure 2 This is a perspective view (partial) of the present invention.

[0027] Figure 3 yes Figure 2 Exploded view;

[0028] Figure 4 This is a perspective view of the lower rocker arm of this utility model;

[0029] Reference numerals: 1. Rear swingarm; 11. Lower swingarm mounting base; 2. Lower swingarm; 21. Rear connecting tube; 22. Shaft hole; 23. Front fork; 3. Shock absorber; 4. First adjustable link; 41. Front ball joint; 42. Rear ball joint; 5. Second adjustable link; 6. Spacer; 7. Pin; 8. Bushing; 9. Bearing. Detailed Implementation

[0030] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. See also: Figure 1-4 :

[0031] An adjustable progressive rear damping system includes:

[0032] The vehicle frame has a first hinge point, a second hinge point, and a third hinge point arranged on its side from top to bottom;

[0033] The rear rocker arm 1 has its front end hinged to the third hinge point, and a lower rocker arm mounting base 11 is integrally formed on the upper part of the rear rocker arm 1.

[0034] The lower rocker arm 2 is hinged at the middle to the lower rocker arm mounting base 11;

[0035] Shock absorber 3, the upper end of which is hinged to the first hinge point and the lower end of which is hinged to the front end of the lower rocker arm 2;

[0036] The adjustable linkage assembly includes a first adjustable linkage 4 and a second adjustable linkage 5 symmetrically arranged on the left and right sides of the shock absorber 3 (the adjustable linkage adopts a conventional structure in the art, such as an adjustable linkage whose effective length can be adjusted by a threaded connection system). The front ends of the first adjustable linkage 4 and the second adjustable linkage 5 are hinged to the second hinge point, and the rear ends are hinged to the rear end of the lower rocker arm 2.

[0037] The lower rocker arm 2, shock absorber 3, and adjustable linkage assembly form a triangular support and shock absorption structure connecting the frame and the rear rocker arm 1.

[0038] Comparison Appendix Figure 2 and attached Figure 3 In this embodiment, the specific connection structure of the adjustable linkage assembly is as follows: a spacer 6 is provided inside the second hinge point; the front ball joints 41 of the first adjustable linkage 4 and the second adjustable linkage 5 are respectively connected to the two ends of the spacer 6 and locked by a pin 7; a rear connecting tube 21 extending longitudinally is provided at the rear end of the lower rocker arm 2; the rear ball joints 42 of the first adjustable linkage 4 and the second adjustable linkage 5 are respectively connected to the two ends of the rear connecting tube 21 and locked by a pin 7. Preferably, the first adjustable linkage 4 and the second adjustable linkage 5 are inclined inward from front to back. Further, a clearance space is formed between the first adjustable linkage 4 and the second adjustable linkage 5 when the shock absorber 3 moves up and down; the shock absorber 3 passes through the clearance space and is hinged to the lower rocker arm 2; the extension dimension of the rear connecting tube 21 is based on satisfying the clearance space of the shock absorber 3.

[0039] Comparison Appendix Figure 2 Appendix Figure 3 and attached Figure 4In this embodiment, the specific structure of the lower rocker arm 2 is as follows: the rear end of the lower rocker arm 2 is provided with a rear connecting pipe 21 that is hinged to the first adjustable connecting rod 4 and the second adjustable connecting rod 5; the middle part is provided with a shaft hole 22 that is hinged to the lower rocker arm mounting seat 11; and the front end is provided with a front fork 23 that is hinged to the shock absorber 3. The center line connecting the rear connecting pipe 21 and the shaft hole 22 forms an angle with the center line connecting the front fork 23 and the shaft hole 22. The included angle makes the lower rocker arm 2 have a structure with the lowest part in the middle and the two ends raised. The included angle is preferably 100°-120°. Its connection structure is as follows: the lower rocker arm mounting seat 11 is hinged to the shaft hole 22 of the lower rocker arm 2 through a hinge assembly. The hinge assembly includes a pin 7, a bushing 8, and a bearing 9. The pin 7 passes through the lower rocker arm mounting seat 11 and the shaft hole 22. The bushing 8 is sleeved on the pin 7. The bearing 9 is disposed between the bushing 8 and the hole wall of the shaft hole 22.

[0040] The specific vibration reduction process in this embodiment is as follows:

[0041] During the installation of the shock absorption system, first adjust the first adjustable link 4 and the second adjustable link 5 to their optimal lengths, then refer to the above structure and attachments. Figure 1 Complete the installation of each component;

[0042] When the vehicle is in motion, the wheels encounter bumps or potholes on the road surface. The impact force is applied to the wheels and transmitted to the rear rocker arm 1, which pushes the rear rocker arm 1 to swing up and down around the third hinge point. The load is further transmitted to the lower rocker arm 2, which is hinged to the lower rocker arm mounting seat 11.

[0043] The rear rocker arm 1 drives the lower rocker arm 2 to swing around the hinge point in the middle, which helps to adjust the angle of the shock absorber 3, optimize the leverage ratio, optimize the axial force distribution of the shock absorber 3, and improve the damping linearity.

[0044] The rear end of the lower rocker arm 2 pulls or pushes the first adjustable link 4 and the second adjustable link 5 through its hinge point with the first adjustable link 4 and the second adjustable link 5. The symmetrically distributed first adjustable link 4 and the second adjustable link 5 integrate the dispersed load into a concentrated force along the direction of the spacer 6 and transmit it to the second hinge point of the frame.

[0045] The front end of the lower rocker arm 2 pushes or pulls the shock absorber 3 through the front fork 23, causing the shock absorber 3 to compress or extend axially, thus efficiently absorbing vibration energy;

[0046] Ultimately, the adjustable linkage assembly transmits the load to the frame through the second hinge point and the shock absorber 3 through the first hinge point, respectively. The frame acts as the overall load-bearing structure to distribute the system load and avoid stress concentration.

[0047] Preferably, in order to ensure the reliability of bearing 9 in reducing friction damage and extending service life, bearing 9 of the hinge assembly is preferably a high-strength needle roller bearing 9, such as bearing 9 of model SKF HK2220; bearing 9 of the hinge assembly are arranged in pairs and distributed on the left and right; pin 7 of the hinge assembly passes through shaft hole 22 and is locked by nut.

[0048] The above embodiments are merely preferred embodiments of the present utility model and are not intended to limit the scope of protection of the present utility model. Therefore, all equivalent changes made to the structure, shape, and principle of the present utility model should be covered within the scope of protection of the present utility model.

Claims

1. An adjustable progressive rear suspension system, characterized by, include: The vehicle frame has a first hinge point, a second hinge point, and a third hinge point arranged on its side from top to bottom; The rear rocker arm (1) is hinged to the third hinge point at its front end, and a lower rocker arm mounting seat (11) is integrally formed on the upper part of the rear rocker arm (1). The lower rocker arm (2) is hinged at the middle to the lower rocker arm mounting base (11); Shock absorber (3), the upper end of the shock absorber (3) is hinged to the first hinge point and the lower end is hinged to the front end of the lower rocker arm (2); Adjustable link assembly, the adjustable link assembly includes a first adjustable link (4) and a second adjustable link (5) symmetrically arranged on the left and right sides of the shock absorber (3), the front ends of the first adjustable link (4) and the second adjustable link (5) are hinged to the second hinge point, and the rear ends are hinged to the rear end of the lower rocker arm (2). The lower rocker arm (2), shock absorber (3) and adjustable linkage assembly form a triangular support and shock absorption structure connecting the frame and the rear rocker arm (1).

2. An adjustable progressive rear suspension system according to claim 1, wherein, The second hinge point is provided with a spacer (6), and the front ball joints (41) of the first adjustable link (4) and the second adjustable link (5) are respectively connected to the two ends of the spacer (6) and locked by the pin (7).

3. The adjustable progressive rear damping system according to claim 1, characterized in that, The rear end of the lower rocker arm (2) is provided with a longitudinally extending rear connecting tube (21). The rear ball joints (42) of the first adjustable link (4) and the second adjustable link (5) are respectively connected to the two ends of the rear connecting tube (21) and locked by the pin (7).

4. An adjustable progressive rear damping system according to claim 1, characterized in that, The first adjustable link (4) and the second adjustable link (5) are inclined inward from front to back.

5. An adjustable progressive rear damping system according to claim 1, characterized in that, The lower rocker arm mounting base (11) is hinged to the shaft hole (22) of the lower rocker arm (2) through a hinge assembly. The hinge assembly includes a pin (7), a bushing (8) and a bearing (9). The pin (7) passes through the lower rocker arm mounting base (11) and the shaft hole (22). The bushing (8) is sleeved on the pin (7). The bearing (9) is located between the bushing (8) and the hole wall of the shaft hole (22).

6. An adjustable progressive rear damping system according to claim 1, characterized in that, The lower rocker arm (2) has a rear connecting tube (21) that is hinged to the first adjustable link (4) and the second adjustable link (5) at its rear end, a shaft hole (22) that is hinged to the lower rocker arm mounting seat (11) at its middle part, and a front fork (23) that is hinged to the shock absorber (3) at its front end. The center line between the rear connecting tube (21) and the shaft hole (22) forms an angle with the center line between the front fork (23) and the shaft hole (22).

Images