A preloaded adjustable rear shock absorber
By using a hydraulically driven preload adjustment ring seat design, the problems of limited operating space and difficult adjustment of traditional motorcycle rear shock absorbers are solved, achieving simple and stable preload adjustment and damping shock absorption effects.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- TAI ZHOU SHI NUO GAO KE JI YOU XIAN GONG SI
- Filing Date
- 2025-09-29
- Publication Date
- 2026-07-21
AI Technical Summary
The preload adjustment mechanism of the rear shock absorber of a traditional motorcycle is located at the bottom, which limits the operating space, makes adjustment difficult and laborious, and is prone to rust and jamming.
The preload adjustment ring seat is moved up and down by hydraulic drive. It is connected to the shock absorber base through a hydraulic adjustment device to realize the adjustment of the preload force of the damping spring. Combined with the split structure and connecting components, the adjustment angle can be adjusted.
It achieves simple, stable and reliable preload adjustment, reduces the difficulty and effort of operation, and provides damping and shock absorption effects.
Smart Images
Figure CN224533339U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of shock absorber technology, and specifically refers to a preload-adjustable rear shock absorber. Background Technology
[0002] In motorcycle rear shock absorbers, preload (i.e., initial compression) is typically adjusted to adapt to different load conditions (such as single-person riding, heavy loads, or aggressive driving) and road conditions. Preload adjustment changes the initial compression of the damping spring, thereby adjusting the rear shock absorber's support stiffness and initial posture to ensure the vehicle always maintains optimal handling and comfort.
[0003] Currently, most traditional preload adjustment mechanisms are mechanical structures fixed on the shock absorber. That is, an adjustment ring with threads is set at the shock absorber base or spring seat. By manually rotating or using a special tool to move the adjustment ring along the shock absorber axis, it presses against the damping spring and changes its compression.
[0004] However, this traditional preload adjustment mechanism is often located at the bottom of the shock absorber, with very limited operating space. Adjustment requires the use of specific tools, which is laborious, difficult to adjust, and prone to rust and jamming. Summary of the Invention
[0005] The purpose of this invention is to provide a preload-adjustable rear shock absorber, which uses hydraulic drive to move the preload adjustment ring seat up and down to adjust the preload force of the damping spring. The adjustment is not only simple, stable, reliable and effortless, but the hydraulic pressure in the drive chamber can also provide damping and shock absorption effect for the shock absorber.
[0006] This utility model is implemented as follows: A preload-adjustable rear shock absorber includes a shock absorber base and a hydraulic cylinder mounted on the shock absorber base. The lower end of a piston rod slides axially within the hydraulic cylinder and is fitted with a piston valve body. A damping spring is disposed between the upper end of the piston rod and the shock absorber base. A preload adjustment ring seat is disposed on the shock absorber base. The preload adjustment ring seat can slide up and down relative to the shock absorber base along the axial direction of the piston rod, and a driving cavity is formed between the preload adjustment ring seat and the shock absorber base. A hydraulic adjustment device is disposed on one side of the shock absorber base, and the fluid of the hydraulic adjustment device is connected to the driving cavity. The lower end of the damping spring abuts against the preload adjustment ring seat. The hydraulic adjustment device drives the axial movement of the shock absorber base through hydraulic pressure to adjust the compression of the damping spring.
[0007] In the aforementioned preload-adjustable rear shock absorber, the hydraulic adjustment device and the shock absorber base are separate structures. The hydraulic adjustment device is connected to the shock absorber base via a connecting component, and this connecting component can adjust the circumferential connection angle of the hydraulic adjustment device relative to the shock absorber base.
[0008] In the aforementioned preload-adjustable rear shock absorber, the side wall of the shock absorber base has an assembly plane, the connecting assembly includes several circumferentially distributed assembly screw holes on the assembly plane, the hydraulic adjustment device has two or more assembly through holes corresponding to different assembly screw holes, and the tail end of the assembly screw passes through the assembly through hole from the outside to the inside and is screwed and fixed to the corresponding assembly screw hole.
[0009] In the aforementioned preload-adjustable rear shock absorber, the hydraulic adjustment device includes an adjustment cylinder connected to the shock absorber base. A hydraulic piston slides within the adjustment cylinder, and the driving end of the hydraulic piston is connected to the power component for transmission. The hydraulic end and the adjustment cylinder form a hydraulic chamber filled with hydraulic oil, and the driving chamber is connected to the hydraulic chamber.
[0010] In the aforementioned preload-adjustable rear shock absorber, the power assembly includes an adjusting end cover located at the port of the adjusting oil cylinder. An adjusting screw is screwed onto the center hole of the adjusting end cover. The inner end of the adjusting screw abuts against the drive end face of the hydraulic piston. The outer end of the adjusting end cover extends beyond the adjusting end cover and is fitted with an adjusting cap. The tail end of the fastening screw passes through the adjusting cap and is screwed onto the outer end face of the adjusting screw.
[0011] In the aforementioned preload-adjustable rear shock absorber, the adjusting oil cylinder has an oil outlet port along its axis of rotation relative to the shock absorber base. The inner end of the oil outlet port is connected to the hydraulic chamber, and the outer end of the oil outlet port is connected to one end of the drive oil pipe through a rotary joint. The other end of the drive oil pipe is connected to the drive chamber.
[0012] The outstanding advantages of this utility model compared to the prior art are: This utility model has a simple structure and reasonable design. It uses hydraulic drive to move the preload adjustment ring seat up and down to adjust the preload force of the damping spring. The adjustment operation is simple, stable and reliable and effortless. At the same time, the hydraulic pressure in the drive cavity can also provide damping and shock absorption effect for the shock absorber. Attached Figure Description
[0013] Figure 1 This is a three-dimensional view of the hydraulic adjustment device of this utility model, which is horizontally fixed. Figure 2 This is a three-dimensional view of the hydraulic adjustment device of this utility model, which is fixed vertically. Figure 3 This is a three-dimensional view of the shock-absorbing base of this utility model; Figure 4 This is an overall cross-sectional view of the present invention. Figure 1 ; Figure 5 This is an overall cross-sectional view of the present invention. Figure 2 .
[0014] In the diagram: 1. Shock-absorbing base; 2. Hydraulic cylinder; 3. Piston rod; 4. Damping spring; 5. Preload adjusting ring seat; 6. Drive chamber; 7. Assembly plane; 8. Assembly screw hole; 9. Assembly screw; 10. Adjusting oil cylinder; 11. Hydraulic piston; 12. Hydraulic chamber; 13. Adjusting end cover; 14. Adjusting screw; 15. Adjusting cap; 16. Fastening screw; 17. Rotary joint; 18. Drive oil pipe. Detailed Implementation
[0015] The present invention will be further described below with reference to specific embodiments. See also: Figure 1 —5: A preload-adjustable rear shock absorber includes a shock absorber base 1 and a hydraulic cylinder 2 disposed on the shock absorber base 1. The lower end of a piston rod 3 slides axially within the hydraulic cylinder 2 and is fitted with a piston valve body. A damping spring 4 is disposed between the upper end of the piston rod 3 and the shock absorber base 1. A preload adjustment ring seat 5 is disposed on the shock absorber base 1. The preload adjustment ring seat 5 can slide up and down relative to the shock absorber base 1 along the axial direction of the piston rod 3. A drive chamber 6 is formed between the preload adjustment ring seat 5 and the shock absorber base 1. A hydraulic adjustment device is disposed on one side of the shock absorber base 1. The fluid of the hydraulic adjustment device is connected to the drive chamber 6. The lower end of the damping spring 4 abuts against the preload adjustment ring seat 5. The hydraulic adjustment device drives the shock absorber base 1 to move axially through hydraulic pressure to adjust the compression of the damping spring 4.
[0016] This utility model has a simple structure and reasonable design. By using hydraulic drive to move the preload adjustment ring seat 5 up and down, the preload force of the damping spring 4 can be adjusted. The adjustment operation is simple, stable and reliable and effortless. At the same time, the hydraulic pressure in the drive cavity 6 can also provide damping and shock absorption effect for the shock absorber.
[0017] Compared to the existing rear shock absorber's integrated structure on the frame, to avoid interference between the added hydraulic adjustment device and the existing frame structure, the hydraulic adjustment device and the shock absorber base 1 are separate components. The hydraulic adjustment device is connected to the shock absorber base 1 via a connecting assembly, which can adjust the circumferential connection angle of the hydraulic adjustment device relative to the shock absorber base 1. This allows for 360° angular position adjustment of the hydraulic adjustment device relative to the shock absorber base 1 via the connecting assembly, effectively avoiding interference with the existing frame structure.
[0018] Furthermore, to ensure the hydraulic adjustment device can be stably mounted on the shock-absorbing base 1, the side wall of the shock-absorbing base 1 has a mounting plane 7. Simultaneously, the connecting assembly can rotate the hydraulic adjustment device onto the shock-absorbing base 1 via a pivot, and a positioning pin is used to fix the relative positions of the hydraulic adjustment device and the shock-absorbing base 1. In this embodiment, the connecting assembly includes several mounting screw holes 8 evenly distributed circumferentially on the mounting plane 7. The hydraulic adjustment device has two or more mounting through holes, each corresponding to a different mounting screw hole 8. The tail end of the mounting screw 9 penetrates the mounting through hole from the outside in and is screwed into the corresponding mounting screw hole 8 for fixation.
[0019] The hydraulic adjustment device can be a hydraulic power device such as a power cylinder. In this embodiment, the specific structure of the hydraulic adjustment device is as follows: the hydraulic adjustment device includes an adjustment cylinder 10 connected to the shock-absorbing base 1, a hydraulic piston 11 sliding inside the adjustment cylinder 10, the driving end of the hydraulic piston 11 being connected to the power component for transmission, and the hydraulic end forming a hydraulic chamber 12 filled with hydraulic oil with the adjustment cylinder 10, and the driving chamber 6 communicating with the hydraulic chamber 12.
[0020] Correspondingly, the power component can also be directly an electrically controlled telescopic power source to drive the hydraulic piston 11, so as to adjust the hydraulic pressure in the hydraulic chamber 12 and the drive chamber 6. In this embodiment, the power component is manually driven, and its specific structure is as follows: The power component includes an adjustment end cover 13 located at the port of the adjustment cylinder 10. An adjustment screw 14 is screwed onto the center hole of the adjustment end cover 13. The inner end of the adjustment screw 14 abuts against the drive end face of the hydraulic piston 11. The outer end of the adjustment end cover 13 extends out of the adjustment end cover 13 and is fitted with an adjustment cap 15. The tail end of the fastening screw 16 passes through the adjustment cap 15 and is screwed onto the outer end face of the adjustment screw 14.
[0021] Furthermore, in order to facilitate the circumferential rotation of the oil cylinder 10, the oil cylinder 10 is provided with an oil outlet port along the axis of its circumferential rotation relative to the shock-absorbing base 1. The inner end of the oil outlet port is connected to the hydraulic chamber 12, and the outer end of the oil outlet port is connected to one end of the drive oil pipe 18 through the rotary joint 17. The other end of the drive oil pipe 18 is connected to the drive chamber 6.
[0022] The above embodiments are only one of the preferred embodiments of this utility model and are not intended to limit the scope of implementation of this utility model. Therefore, all equivalent changes made in accordance with the shape, structure and principle of this utility model should be covered within the protection scope of this utility model.
Claims
1. A preload-adjustable rear shock absorber, the rear shock absorber comprising a shock-absorbing base (1) and a hydraulic cylinder (2) disposed on the shock-absorbing base (1), the lower end of a piston rod (3) sliding axially within the hydraulic cylinder (2) and fitted with a piston valve body, and a damping spring (4) disposed between the upper end of the piston rod (3) and the shock-absorbing base (1), characterized in that: a preload adjusting ring seat (5) is disposed on the shock-absorbing base (1), the preload adjusting seat can slide up and down relative to the shock-absorbing base (1) along the axial direction of the piston rod (3), and a driving cavity (6) is formed between the preload adjusting ring seat (5) and the shock-absorbing base (1), a hydraulic adjusting device is disposed on one side of the shock-absorbing base (1), the liquid of the hydraulic adjusting device is connected to the driving cavity (6), the lower end of the damping spring (4) abuts against the preload adjusting ring seat (5), and the hydraulic adjusting device drives the shock-absorbing base (1) to move axially by hydraulic pressure to adjust the compression of the damping spring (4).
2. The preload-adjustable rear shock absorber according to claim 1, characterized in that: The hydraulic adjustment device and the shock-absorbing base (1) are separate structures. The hydraulic adjustment device is connected to the shock-absorbing base (1) through a connecting component, and the connecting component can adjust the circumferential connection angle of the hydraulic adjustment device relative to the shock-absorbing base (1).
3. A preload-adjustable rear shock absorber according to claim 2, characterized in that: The side wall of the shock-absorbing base (1) has an assembly plane (7). The connecting component includes a number of assembly screw holes (8) evenly distributed on the assembly plane (7) in the circumferential direction. The hydraulic adjustment device has two or more assembly through holes that correspond to different assembly screw holes (8). The tail end of the assembly screw (9) passes through the assembly through hole from the outside to the inside and is screwed and fixed to the corresponding assembly screw hole (8).
4. A preload-adjustable rear shock absorber according to claim 1, 2, or 3, characterized in that: The hydraulic adjustment device includes an adjustment cylinder (10) connected to the shock-absorbing base (1). A hydraulic piston (11) slides inside the adjustment cylinder (10). The driving end of the hydraulic piston (11) is connected to the power component for transmission, and the hydraulic end and the adjustment cylinder (10) form a hydraulic chamber (12) filled with hydraulic oil. The driving chamber (6) is connected to the hydraulic chamber (12).
5. A preload-adjustable rear shock absorber according to claim 4, characterized in that: The power assembly includes an adjustment end cap (13) located at the port of the adjustment cylinder (10). An adjustment screw (14) is screwed onto the center hole of the adjustment end cap (13). The inner end of the adjustment screw (14) abuts against the drive end face of the hydraulic piston (11). The outer end of the adjustment end cap (13) extends out of the adjustment end cap (13) and is fitted with an adjustment cap (15). The tail end of the fastening screw (16) passes through the adjustment cap (15) and is screwed onto the outer end face of the adjustment screw (14).
6. A preload-adjustable rear shock absorber according to claim 4, characterized in that: The regulating oil cylinder (10) has an oil outlet port along the axis of its circumferential rotation relative to the shock-absorbing base (1). The inner end of the oil outlet port is connected to the hydraulic chamber (12), and the outer end of the oil outlet port is connected to one end of the drive oil pipe (18) through a rotary joint (17). The other end of the drive oil pipe (18) is connected to the drive chamber (6).