A multi-link progressive rear suspension system

Abstract

The utility model belongs to the technical field of vehicle damping system relates to a kind of multi-connecting rod progressive rear damping system, vehicle frame, the side of the vehicle 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 the 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;Multi-stage connecting rod assembly, the multi-stage connecting rod assembly is composed of upper connecting rod and lower rocker arm, the upper connecting rod is triangular structure, its front rod is hinged with second hinged point, two side rods are hinged with the rear end of lower rocker arm respectively, and the middle part of lower rocker arm is hinged on lower rocker arm mounting seat;Shock absorber, the upper end of the shock absorber is hinged with first hinged point, and the lower end is hinged with the front end of lower rocker arm.The multi-connecting rod progressive rear damping system provided by the utility model can better maintain the linearity of damping, has more efficient shock-absorbing capacity, can also optimize the transmission path of force, and reduce metal fatigue.

Description

Technical Field

[0001] This utility model belongs to the technical field of vehicle shock absorption systems, and relates to a multi-link 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 maintaining damping linearity, reducing metal fatigue, and improving cushioning performance. Utility Model Content

[0005] This invention addresses the shortcomings of existing technologies by providing a multi-link progressive rear shock absorption system that can better maintain damping linearity, has more efficient shock absorption capacity, optimizes the force transmission path, and reduces metal fatigue.

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

[0007] A multi-link 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] A multi-stage linkage assembly, comprising an upper linkage and a lower rocker arm, wherein the upper linkage has a triangular structure, with its front rod hinged to the second hinge point and its two side rods respectively hinged to the rear ends of the lower rocker arm, and the middle part of the lower rocker arm is hinged 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] The upper connecting rod, lower rocker arm, and shock absorber form a triangular support and shock absorption structure connecting the frame and the rear rocker arm.

[0013] In the aforementioned multi-link progressive rear shock absorber system, the front rod of the upper link is a cylindrical tube and is hinged to a second hinge point via a first hinge assembly. The first hinge assembly includes a pin and a bushing. The pin passes through the front rod and the first hinge point, and the bushing is disposed between the pin and the first hinge point.

[0014] In the aforementioned multi-link progressive rear shock absorber system, the two side rods of the upper linkage are symmetrically arranged and connected as a whole by a crossbar. The rear end of the side rod is hinged to the rear connecting tube of the lower rocker arm through a second hinge assembly. The second hinge assembly includes a pin, a bushing, and a bearing. The pin passes through the two side rods and the rear connecting tube. The bushing is sleeved on the pin. The bearing is located between the bushing and the inner wall of the rear connecting tube.

[0015] In the aforementioned multi-link progressive rear shock absorber system, preferably, the front rod, side rod, and cross rod of the upper link are integrally formed, and the front rod, side rod, and cross rod form an obstacle space when the shock absorber moves up and down. The shock absorber passes through the obstacle space and is hinged to the lower rocker arm.

[0016] In the aforementioned multi-link progressive rear shock absorber system, the lower rocker arm mounting base is hinged to the middle connecting tube of the lower rocker arm via a third hinge assembly. The third hinge assembly includes a pin, a bushing, and a bearing. The pin passes through the lower rocker arm mounting base and the middle connecting tube, the bushing is sleeved on the pin, and the bearing is disposed between the bushing and the inner wall of the middle connecting tube.

[0017] In the aforementioned multi-link progressive rear shock absorber system, the pin is locked by locking components such as nuts and screws.

[0018] In the aforementioned multi-link progressive rear damping system, the bearing is preferably a high-strength needle roller bearing, such as the SKF HK2220 bearing.

[0019] In the aforementioned multi-link progressive rear damping system, the bearings in the second hinge assembly are arranged in pairs and distributed left and right.

[0020] In the aforementioned multi-link progressive rear shock absorber system, the rear end of the lower rocker arm is provided with a rear connecting tube hinged to the upper connecting rod, the middle part is provided with a middle connecting tube hinged to the lower rocker arm mounting seat, and the front end is provided with a front fork hinged to the shock absorber. The center line connecting the rear connecting tube and the middle connecting tube forms an angle with the center line connecting the front fork and the middle connecting tube. The angle makes the lower rocker arm have a structure with the lowest part in the middle and the two ends raised. The angle is preferably 100°-120°.

[0021] Compared with the prior art, this utility model has the following advantages:

[0022] This invention provides a multi-link progressive rear shock absorber system. It employs a triangular upper link and a lower rocker arm with a central constraint and movable ends, forming a multi-stage linkage system. This results in a more efficient shock absorption performance and a more linear damping design. The invention uses the upper link, lower rocker arm, and shock absorber to form a triangular support shock absorber structure connecting the frame and the rear rocker arm, providing more efficient cushioning performance and optimizing the force transmission path, thus reducing metal fatigue. Furthermore, this invention improves the hinge structure, reducing friction loss and extending service life. Attached Figure Description

[0023] Figure 1 This is a perspective view of the present invention;

[0024] Figure 2 This is a perspective view (partial) of the present invention;

[0025] Figure 3 yes Figure 2 Exploded view;

[0026] Figure 4 This is a perspective view of the upper connecting rod of this utility model;

[0027] Figure 5 This is a perspective view of the lower rocker arm of this utility model;

[0028] Reference numerals: 1. Rear swingarm; 11. Lower swingarm mounting base; 2. Upper connecting rod; 21. Front rod; 22. Side rod; 23. Crossbar; 3. Lower swingarm; 31. Rear connecting tube; 32. Middle connecting tube; 33. Front fork; 4. Shock absorber; 5. Pin; 6. Bushing; 7. Bearing. Detailed Implementation

[0029] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. See also: Figure 1-5 :

[0030] A multi-link progressive rear damping system includes:

[0031] The frame (not shown in the attached drawing) has a first hinge point, a second hinge point, and a third hinge point arranged on its side from top to bottom;

[0032] 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.

[0033] A multi-stage linkage assembly, comprising an upper linkage 2 and a lower rocker arm 3, wherein the upper linkage 2 has a triangular structure, with its front rod 21 hinged to the second hinge point and its two side rods 22 respectively hinged to the rear ends of the lower rocker arm 3, and the middle part of the lower rocker arm 3 is hinged to the lower rocker arm mounting base 11.

[0034] Shock absorber 4, 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 3.

[0035] The upper connecting rod 2, the lower rocker arm 3, and the shock absorber 4 form a triangular support and shock absorption structure connecting the frame and the rear rocker arm 1.

[0036] Comparison Appendix Figure 2 Appendix Figure 3 and attached Figure 4 In this embodiment, the specific structure of the upper connecting rod 2 is as follows: the front rod 21 of the upper connecting rod 2 is a cylindrical tube and is hinged to a second hinge point through a first hinge assembly. The first hinge assembly includes a pin 5 and a bushing 6. The pin 5 passes through the front rod 21 and the first hinge point, and the bushing 6 is disposed between the pin 5 and the first hinge point. The two side rods 22 of the upper connecting rod 2 are symmetrically arranged and connected as a whole by a crossbar 23. The rear end of the side rod 22 is connected to the rear connecting tube 31 of the lower rocker arm 3 through the second hinge assembly. The second hinge assembly includes a pin 5, a bushing 6, and a bearing 7. The pin 5 passes through the two side rods 22 and the rear connecting tube 31. The bushing 6 is sleeved on the pin 5. The bearing 7 is disposed between the bushing 6 and the inner wall of the rear connecting tube 31. Preferably, the front rod 21, side rod 22, and cross rod 23 of the upper connecting rod 2 are integrally formed. The front rod 21, side rod 22, and cross rod 23 form a clearance space when the shock absorber 4 moves up and down. The shock absorber 4 passes through the clearance space and is hinged to the lower rocker arm 3.

[0037] Comparison Appendix Figure 2 Appendix Figure 3 and attached Figure 5In this embodiment, the specific structure of the lower rocker arm 3 is as follows: the rear end of the lower rocker arm 3 is provided with a rear connecting pipe 31 that is hinged to the upper connecting rod 2, the middle part is provided with a middle connecting pipe 32 that is hinged to the lower rocker arm mounting seat 11, and the front end is provided with a front fork 33 that is hinged to the shock absorber 4. The center line connecting the rear connecting pipe 31 and the middle connecting pipe 32 forms an angle with the center line connecting the front fork 33 and the middle connecting pipe 32. The angle makes the lower rocker arm 3 have the lowest middle part and the two ends raised. The angle is preferably 100°-120°. Its hinge structure is as follows: the lower rocker arm mounting seat 11 is hinged to the middle connecting pipe 32 of the lower rocker arm 3 through a third hinge assembly. The third hinge assembly includes a pin 5, a bushing 6 and a bearing 7. The pin 5 passes through the lower rocker arm mounting seat 11 and the middle connecting pipe 32. The bushing 6 is sleeved on the pin 5. The bearing 7 is located between the bushing 6 and the inner wall of the middle connecting pipe 32.

[0038] The specific vibration reduction process in this embodiment is as follows:

[0039] Comparison Appendix Figure 1 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 3, which is hinged to the lower rocker arm mounting seat 11.

[0040] The rear rocker arm 1 drives the lower rocker arm 3 to swing around the hinge point in the middle, which helps to adjust the angle of the shock absorber 4, optimize the leverage ratio, improve the axial force distribution of the shock absorber 4, and enhance the damping linearity.

[0041] The rear end of the lower rocker arm 3 pulls or pushes the upper link 2 through its hinge point with the side rod 22. The triangular structure of the upper link 2 integrates the distributed load into a concentrated force along the direction of the front rod 21 and transmits it to the second hinge point of the frame.

[0042] The front end of the lower rocker arm 3 pushes or pulls the shock absorber 4 through the front fork 33, causing the shock absorber 4 to compress or extend axially, thus efficiently absorbing vibration energy.

[0043] Ultimately, the upper connecting rod 2 transmits the load to the frame through the second hinge point and the shock absorber 4 through the first hinge point, respectively. The frame acts as the overall load-bearing structure to distribute the system load and avoid stress concentration.

[0044] To prevent the pin 5 from moving axially during use, the pin 5 is locked by locking components such as nuts and screws.

[0045] To ensure the reliability of bearing 7 in reducing frictional damage and extending service life, bearing 7 is preferably a high-strength needle roller bearing 7, such as bearing 7 with model number SKF HK2220.

[0046] Preferably, the bearings 7 in the second hinge assembly are arranged in pairs and distributed on the left and right.

[0047] 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. A multi-link 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). A multi-stage linkage assembly, which consists of an upper linkage (2) and a lower rocker arm (3). The upper linkage (2) has a triangular structure, with its front rod (21) hinged to the second hinge point and its two side rods (22) hinged to the rear ends of the lower rocker arm (3) respectively. The middle part of the lower rocker arm (3) is hinged to the lower rocker arm mounting base (11). Shock absorber (4), the upper end of the shock absorber (4) is hinged to the first hinge point and the lower end is hinged to the front end of the lower rocker arm (3); The upper connecting rod (2), lower rocker arm (3) and shock absorber (4) form a triangular support and shock absorption structure connecting the frame and the rear rocker arm (1).

2. The multi-link progressive rear damping system according to claim 1, characterized in that, The front rod (21) of the upper connecting rod (2) is a cylindrical tube and is hinged to the second hinge point through a first hinge assembly. The first hinge assembly includes a pin (5) and a bushing (6). The pin (5) passes through the front rod (21) and the first hinge point, and the bushing (6) is disposed between the pin (5) and the first hinge point.

3. The multi-link progressive rear damping system according to claim 1, characterized in that, The two side rods (22) of the upper connecting rod (2) are arranged symmetrically and connected as one unit by a crossbar (23). The rear end of the side rod (22) is hinged to the rear connecting tube (31) of the lower rocker arm (3) through a second hinge assembly. The second hinge assembly includes a pin (5), a bushing (6) and a bearing (7). The pin (5) passes through the two side rods (22) and the rear connecting tube (31). The bushing (6) is sleeved on the pin (5). The bearing (7) is located between the bushing (6) and the inner wall of the rear connecting tube (31).

4. A multi-link progressive rear damping system according to claim 3, characterized in that, The front rod (21), side rod (22) and cross rod (23) of the upper connecting rod (2) are integrally formed. The front rod (21), side rod (22) and cross rod (23) form a clearance space when the shock absorber (4) moves up and down. The shock absorber (4) passes through the clearance space and is hinged to the lower rocker arm (3).

5. A multi-link progressive rear damping system according to claim 1, characterized in that, The lower rocker arm mounting base (11) is hinged to the middle connecting tube (32) of the lower rocker arm (3) through a third hinge assembly. The third hinge assembly includes a pin (5), a bushing (6) and a bearing (7). The pin (5) passes through the lower rocker arm mounting base (11) and the middle connecting tube (32). The bushing (6) is sleeved on the pin (5). The bearing (7) is located between the bushing (6) and the inner wall of the middle connecting tube (32).

6. A multi-link progressive rear damping system according to claim 1, characterized in that, The lower rocker arm (3) has a rear connecting tube (31) hinged to the upper connecting rod (2) at its rear end, a middle connecting tube (32) hinged to the lower rocker arm mounting seat (11) at its middle part, and a front fork (33) hinged to the shock absorber (4) at its front end. The center line between the rear connecting tube (31) and the middle connecting tube (32) forms an angle with the center line between the front fork (33) and the middle connecting tube (32).

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