Motorcycle rear damping spring adjusting assembly

Abstract

The invention discloses a motorcycle rear damping spring adjusting assembly which comprises a positioning seat used for installing a spring and a base arranged on the positioning seat in a sleeving mode, and a hydraulic oil cavity used for containing hydraulic oil is formed between the positioning seat and the base. The base is connected with a first damping adjuster used for controlling the hydraulic oil amount of the hydraulic oil cavity. According to the rear shock absorber assembly of the technical scheme, through the first shock absorption adjuster and the second shock absorption adjuster which are arranged in parallel, when the height of a seat needs to be rapidly adjusted, the height of the seat can be rapidly adjusted through the second shock absorption adjuster, and for different road conditions and different shock absorption effects, the first shock absorption adjuster is matched with the spring; therefore, the rear shock absorber can meet the use requirements of an operator under different road conditions.

Description

Technical Field

[0001] The present invention belongs to the field of motorcycles and relates to a rear shock absorber spring adjustment assembly for motorcycles. Background Art

[0002] The rear shock absorber of a motorcycle is an important part of the motorcycle suspension system. Its main function is to buffer the vibration and impact of the motorcycle caused by road unevenness, quickly attenuate the vibration, improve the riding comfort, reduce the dynamic stress of each part of the vehicle body, and extend the service life of the vehicle.

[0003] The adjustment of the spring of the rear shock absorber is usually achieved by rotating an adjustment knob or bolt. Increasing the adjustment of the compression damping makes the shock absorber harder during compression, which is suitable for high-speed driving and intense handling; reducing the adjustment of the compression damping makes the shock absorber softer, which is suitable for low-speed driving and small bumpy roads. However, manually turning the spring adjustment nut or spring adjustment seat is troublesome and difficult to adjust.

[0004] At the same time, for operators of different heights, the requirements for the body height are also different. Even the same operator has different body height requirements in different riding scenarios, such as changes in load and road conditions. Therefore, it is necessary to improve the adjustment of the shock absorber spring of the rear shock absorber so that it can not only easily achieve the adjustment of the body height, but also make the adjustment of the hardness of the rear shock absorber more accurate and convenient.

[0005] Therefore, to solve the above problems, a rear shock absorber spring adjustment assembly for motorcycles is needed to solve the above problems. Summary of the Invention

[0006] In view of this, for the rear shock absorber assembly of the present technical solution, through the first shock absorber adjuster and the second shock absorber adjuster arranged in parallel, when a quick adjustment of the seat height is required, the quick adjustment of the seat height can be achieved through the second shock absorber adjuster. For different road conditions with different requirements for the shock absorption effect, through the cooperation of the first shock absorber adjuster and the spring, the rear shock absorber meets the usage requirements of the operator in different road conditions.

[0007] A rear shock absorber spring adjustment assembly for a motorcycle, comprising a positioning seat for installing a spring and a base sleeved on the positioning seat, a hydraulic oil chamber for accommodating hydraulic oil is formed between the positioning seat and the base; a first shock absorber adjuster and a second shock absorber adjuster for controlling the hydraulic oil volume in the hydraulic oil chamber are connected and arranged on the base, the first shock absorber adjuster includes a first outer cylinder, an upper end cover, a lower end cover arranged on the first outer cylinder, and a magnetorheological mechanism arranged in the first outer cylinder, the magnetorheological mechanism includes an inner cylinder installed on the inner end face of the upper end cover, a floating piston assembly slidably and adjustably arranged in the inner cylinder, and a magnetorheological assembly installed in cooperation with the inner cylinder, the floating piston assembly reciprocates axially to drive the magnetorheological fluid to form different circulation circuits through the magnetorheological assembly.

[0008] Further, the magnetorheological assembly includes an inner cylinder, a front end cover, a rear end cover installed in cooperation with the inner cylinder, an inner core installed in the inner cylinder, and an excitation coil wound around the inner core. An inner core opening is formed in the middle of the inner core. A magnetorheological gap for the flow of magnetorheological fluid is formed between the inner core and the inner cylinder. A radial opening communicating with the magnetorheological gap is formed in the inner core in the radial direction, and a radial valve structure for cooperating with the radial opening to open or close is arranged at the radial opening.

[0009] Further, the radial valve structure includes a positioning block fixedly installed on the inner core, an elastic valve sheet fixedly installed on the side of the positioning block and attached to the radial opening, and a guiding end head installed on the end face of the positioning block. The elastic valve sheet can bend around the guiding end head to open or close the radial opening.

[0010] Further, the guiding end head includes an upper guiding end head and a lower guiding end head. The positioning block is axially locked to the inner core through a locking rod. A locking hole for installing the locking rod is formed between the upper guiding end head and the lower guiding end head. Both the upper guiding end head and the lower guiding end head are made of elastic materials.

[0011] Further, an end cover opening for the flow of magnetorheological fluid is formed on the rear end cover, an end cover valve for the one-way flow of magnetorheological fluid is installed at the end cover opening, and a compensation slider is arranged between the rear end cover and the lower end cover.

[0012] Further, the floating piston assembly includes an inner guiding cylinder fixedly installed in cooperation with the upper end cover, a floating piston slidably and adjustably installed along the axial direction of the inner guiding cylinder, a piston connecting rod installed in cooperation with the floating piston and axially passing through the front end cover, and an inner push block arranged at the end of the piston connecting rod. The floating piston moves axially to drive the inner push block to move, thereby enabling the magnetorheological fluid to circulate.

[0013] Further, an annular airbag is arranged between the inner guiding cylinder and the first outer cylinder, and hydraulic oil for adjusting in cooperation with the hydraulic oil chamber is filled in the inner guiding cylinder.

[0014] Further, the second shock absorber regulator includes a second outer cylinder, a second upper end cap, a second lower end cap, a second inner cylinder, and a shock absorber regulator assembly installed in the second outer cylinder. The shock absorber regulator assembly can move axially along the second outer cylinder to adjust the hydraulic oil in the hydraulic oil chamber.

[0015] Further, the shock absorber regulator assembly includes a second inner cylinder, a second piston block installed in the second inner cylinder, an inner positioning cylinder, an inner guide cylinder, and a driving member coaxially arranged with the second inner cylinder. The inner positioning cylinder is sleeved outside the inner guide cylinder, and the end of the inner positioning cylinder abuts against and is installed on the end face of the second inner cylinder. The output end of the driving member is connected and installed in cooperation with the second piston block, and the driving member can drive the second piston block to reciprocate axially along the second inner cylinder.

[0016] The beneficial effects of the present invention are as follows:

[0017] For the rear shock absorber assembly of the present technical solution, through the first shock absorber regulator and the second shock absorber regulator arranged in parallel, when the seat height needs to be quickly adjusted, the seat height can be quickly adjusted through the second shock absorber regulator. For different road conditions and different requirements for shock absorption effects, through the cooperation of the first shock absorber regulator and the spring, the rear shock absorber can meet the usage requirements of the operator under different road conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention will be further described below with reference to the drawings and embodiments:

[0019] Figure 1 is a schematic structural diagram of the present invention;

[0020] Figure 2 is an internal structural diagram of the first shock absorber regulator of the present invention;

[0021] Figure 3 is an internal structural diagram of the second shock absorber regulator of the present invention;

[0022] Figure 4 is a schematic structural diagram of the radial valve of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] Figure 1 is a schematic structural diagram of the present invention; Figure 2 is an internal structural diagram of the first shock absorber regulator of the present invention; Figure 3 is an internal structural diagram of the second shock absorber regulator of the present invention; Figure 4Schematic diagram of the radial valve structure of the present invention; As shown in the figure, a rear shock absorber spring adjustment assembly for a motorcycle includes a positioning seat for installing a spring and a base 1 sleeved on the positioning seat. A hydraulic oil chamber 3 for accommodating hydraulic oil is formed between the positioning seat and the base 2; A first shock absorber regulator 6 and a second shock absorber regulator 5 for controlling the hydraulic oil volume in the hydraulic oil chamber are connected and arranged on the base 1. The first shock absorber regulator 6 includes a first outer cylinder, an upper end cover, a lower end cover arranged on the first outer cylinder, and a magnetorheological mechanism arranged in the first outer cylinder. The magnetorheological mechanism includes an inner cylinder installed on the inner end face of the upper end cover, a floating piston assembly slidably and adjustably arranged in the inner cylinder, and a magnetorheological assembly installed in cooperation with the inner cylinder. The floating piston assembly reciprocates axially to drive the magnetorheological fluid to form different circulation circuits through the magnetorheological assembly; The first shock absorber regulator 6 includes a first outer cylinder 22, an upper end cover 21 arranged on the first outer cylinder 22, a lower end cover, and a magnetorheological mechanism arranged in the first outer cylinder 22. The magnetorheological mechanism includes an inner cylinder 25 installed on the inner end face of the upper end cover, a floating piston assembly slidably and adjustably arranged in the inner cylinder 25, and a magnetorheological assembly installed in cooperation with the inner cylinder 25. The floating piston assembly reciprocates axially (i.e., Figure 2 the horizontal direction in the figure) to drive the magnetorheological fluid to form different circulation circuits through the magnetorheological assembly. The floating piston assembly can move axially in the inner cylinder 25 along the axial direction to push the magnetorheological fluid to move, so that the magnetorheological fluid can form different reciprocating circulation circuits when passing through the magnetorheological mechanism. After cooperative adjustment, it has a better damping and shock absorption effect. In the rear shock absorber assembly of this technical solution, through the parallel arrangement of the first shock absorber regulator and the second shock absorber regulator, when the seat height needs to be quickly adjusted, the seat height can be quickly adjusted through the second shock absorber regulator. For different road conditions with different requirements for shock absorption effects, through the cooperation of the first shock absorber regulator and the spring, the rear shock absorber meets the usage requirements of the operator under different road conditions.

[0024] In this embodiment, the magnetorheological component includes an inner cylinder 25, a front end cover 24 and a rear end cover 39 that are installed in cooperation with the inner cylinder 25, an inner core 26 installed in the inner cylinder 25, and an excitation coil 35 wound around the inner core. An inner core opening (along the axial direction) is provided in the middle of the inner core 26. A magnetorheological gap for the flow of magnetorheological fluid is formed between the inner core 26 and the inner cylinder 25. The inner core 26 is provided with a radial opening 31 that communicates with the magnetorheological gap in the radial direction. A radial valve structure for opening or closing in cooperation with the radial opening 31 is provided at the radial opening 31. The design of the inner core opening enables the magnetorheological fluid to form different magnetorheological circulation loops through different flow paths under different conditions. The radial opening and the radial valve structure act together to control the flow rate of the magnetorheological fluid through the magnetic field change of the excitation coil 35. A magnetorheological gap is formed between the inner core 26 and the inner cylinder 25 of the magnetorheological component. The radial opening 31 and the radial valve structure on the inner core 26 act together to accurately adjust the damping effect. The design of the inner core opening and the radial opening 31 enables the magnetorheological fluid to flow through different flow paths under different conditions, enhancing the adjustment ability of the shock absorber. Compared with the prior art, this technical solution realizes a more efficient damping effect, improves the response speed and adjustment accuracy of the shock absorber through the accurate control of the magnetorheological fluid flow path.

[0025] In this embodiment, the radial valve structure includes a positioning block 32 fixedly installed on the inner core, an elastic valve sheet 34 fixedly installed on the side of the positioning block 32 and attached to the radial opening, and a guiding end installed on the end face of the positioning block 32. The elastic valve sheet 34 can bend around the guiding end to open or close the radial opening. The radial valve structure is installed at the radial opening 31 and is fixedly installed at the opening position (outer cylindrical surface) of the inner core 26 through the positioning block 32. The end of the elastic valve sheet 34 is fixedly installed in cooperation with the positioning block 32. When the magnetorheological fluid flows out from the radial opening, the elastic valve sheet can be bent to form an opening mode of the valve, enabling the magnetorheological fluid to smoothly pass through the radial opening 31 and form an extrusion of the annular airbag 36.

[0026] The thickness and material of the elastic valve plate 34 can be adjusted according to the actual application requirements to ensure that it can maintain good elasticity and durability under different working conditions. The opening position of the radial hole of the inner core 26 forms an installation step structure, which facilitates the opening of the elastic valve plate 34 when the magnetorheological fluid flows out from the axial opening of the inner core. Otherwise, it is in a closed state, and the magnetorheological fluid cannot flow into the radial hole of the inner core 26 from the outside through the elastic valve plate 34. The shape and size of the guiding end can also be optimized according to the specific position and size of the radial opening to further improve the accuracy and reliability of the radial valve structure. The radial valve structure is fixed on the inner core through the positioning block 32 to ensure the stability of the overall structure. The elastic valve plate 34 is attached to the radial opening 31, and the opening or closing of the radial opening is realized through its elastic characteristics. The guiding end is installed on the end face of the positioning block to provide a guiding effect for the bending of the elastic valve plate, ensuring the accuracy and reliability of its movement. The precise control of the radial opening is achieved, and the technical problem of how to accurately open or close the radial opening is solved. Through the bending action of the elastic valve plate, the radial opening can be accurately opened or closed as needed, thereby regulating the flow of the magnetorheological fluid and achieving precise control of the shock absorption effect. This design not only improves the adjustment accuracy of the shock absorber but also enhances its reliability and service life.

[0027] In this embodiment, the guiding end includes an upper guiding end 33 and a lower guiding end 331. The positioning block 32 is axially locked to the inner core 26 through a locking rod. A locking hole for installing the locking rod is formed between the upper guiding end 33 and the lower guiding end 331. Both the upper guiding end 33 and the lower guiding end 331 are made of elastic materials.

[0028] The positioning block 32 is axially locked to the inner core through a locking rod to ensure its firm fixation. The elastic valve plate is made of a material with good elasticity and can be bent and deformed under the action of an external force, thereby realizing the opening or closing of the radial opening. The guiding end includes an upper guiding end 33 and a lower guiding end 331, and a locking hole for installing the locking rod is formed between the two. The guiding end is made of an elastic material and can provide a stable guiding effect for the bending of the elastic valve plate. Specifically, the designs of the upper guiding end and the lower guiding end enable the elastic valve plate to maintain a stable movement trajectory during the bending process, avoiding deformation or failure caused by uneven stress. The upper guiding end 33 and the lower guiding end 331 can be made of rubber, silica gel or other elastic polymer materials to ensure that sufficient deformation can occur during the installation and locking processes, so as to adapt to the installation requirements of the locking rod. The size of the locking hole can be designed according to the diameter of the locking rod to ensure that the locking rod can be firmly fixed between the upper guiding end and the lower guiding end. The locking rod can be made of a metal material to ensure that it has sufficient strength and rigidity, so as to effectively lock the positioning block in the axial direction. The radius size of the upper guiding end 33 is smaller than that of the lower guiding end 331. With this structure, when the elastic valve plate 34 is opened, the greater the bending opening amplitude of the elastic valve plate 34, the greater the elastic force that the elastic valve plate 34 needs to overcome. Combining with the magnetic field effect of the excitation coil, the damping control effect range is larger and more accurate.

[0029] In this embodiment, an end cover opening for the flow of magnetorheological fluid is provided on the rear end cover 39, and an end cover valve 27 for the one-way flow of magnetorheological fluid is installed at the end cover opening. A compensation slider 28 is provided between the rear end cover 39 and the lower end cover (a compensation gas 29 is provided in the chamber between the compensation slider 28 and the lower end cover, and a compensation opening is provided on its first outer cylinder 22 to facilitate the compensation adjustment of the gas). The setting of the end cover opening allows the magnetorheological fluid to flow between the rear end cover and the lower end cover, and the installation of the end cover valve ensures that the magnetorheological fluid can only flow in one direction, preventing the occurrence of backflow. The compensation slider plays a role of adjustment and compensation between the rear end cover and the lower end cover to ensure the flow stability and compensation control of the magnetorheological fluid. The end cover valve adopts a one-way valve structure, such as a spring-loaded ball valve or a diaphragm valve, to achieve the one-way flow control of the magnetorheological fluid (when the floating piston assembly moves back, that is, when the floating piston assembly moves to the left, the magnetorheological fluid flows into the inner core opening of the inner core through the end cover valve 27 under the restoring action of the annular airbag, and at this time the elastic valve plate 34 is in the closed state). Through the cooperation of the end cover valve and the compensation slider, the one-way control of the magnetorheological fluid flow is realized, and the technical problem of the one-way flow control of the magnetorheological fluid during the flow process is solved.

[0030] In this embodiment, the floating piston assembly includes an inner guide cylinder 23 fixedly installed in cooperation with the upper end cover 21, a floating piston 38 slidably and adjustably installed along the axial direction of the inner guide cylinder 23, a piston connecting rod 37 installed in cooperation with the floating piston 38 and axially passing through the front end cover 24, and an inner push block 40 arranged at the end of the piston connecting rod 37. The axial movement of the floating piston 38 drives the movement of the inner push block 40, thereby causing the magnetorheological fluid to circulate.

[0031] The inner guide cylinder 23 is fixedly installed on the upper end cover 21, providing a sliding track for the floating piston to ensure the stable axial movement of the floating piston 38. The floating piston 38 can slide axially along the inner guide cylinder, driving the piston connecting rod 37 and the inner push block 40 through its movement, thereby pushing the magnetorheological fluid to circulate. The piston connecting rod 37 axially passes through the front end cover 24, connecting the floating piston and the inner push block to transmit the movement force. The inner push block is arranged at the end of the piston connecting rod, and the flow path of the magnetorheological fluid is changed through its movement to achieve damping adjustment. By driving the inner push block through the axial movement of the floating piston 38, the magnetorheological fluid circulates, thereby achieving precise adjustment of the damping effect of the shock absorber. The inner guide cylinder can be fixed to the upper end cover by welding or bolt connection to ensure its stability. The floating piston 38 can be made of wear-resistant materials to extend its service life. The piston connecting rod 37 can be fixed to the floating piston by threaded connection, and multiple piston connecting rods 37 are arranged in parallel to ensure the synchronism of their movement. Through the design of the floating piston assembly, the circulation of the magnetorheological fluid is realized, thereby precisely adjusting the damping effect of the shock absorber. Compared with the prior art, the technical solution of this application has the advantages of simple structure, high adjustment accuracy, and long service life.

[0032] In this embodiment, an annular airbag 36 is arranged between the inner guide cylinder 23 and the first outer cylinder 22, and hydraulic oil 13 for adjusting in cooperation with the hydraulic oil chamber is filled in the inner guide cylinder. The material of the annular airbag 36 can be selected from elastic materials such as rubber or polyurethane, and the thickness and shape of the airbag can be adjusted according to actual needs to ensure that it can effectively cooperate with the circulation of the magnetorheological fluid during the expansion and contraction process. The hydraulic oil in the inner guide cylinder 23 can be high-viscosity or low-viscosity hydraulic oil, and the specific selection depends on the use environment and adjustment requirements of the shock absorber.

[0033] In this embodiment, the second shock absorber regulator includes a second outer cylinder 8, a second upper end cover, a second lower end cover, a second inner cylinder 7 installed in cooperation with the second outer cylinder 8, and a shock absorber regulator assembly arranged in the second outer cylinder 8. The shock absorber regulator assembly can move axially along the second outer cylinder 8 to adjust the hydraulic oil 13 in the hydraulic oil chamber.

[0034] The second outer cylinder 8 serves as the main support structure and cooperates with the second upper end cover and the second lower end cover to form a sealed cavity, ensuring the flow and pressure regulation of the hydraulic oil within the cavity. The second inner cylinder 7, on the other hand, serves as the guiding structure for the shock absorber regulator assembly, ensuring its stability during axial movement. The axial movement of the shock absorber regulator assembly can be achieved in various ways, such as through hydraulic drive, motor drive, or manual adjustment mechanisms. Through the structural design of the second shock absorber regulator, precise regulation of the hydraulic oil within the hydraulic oil cavity is achieved. The axial movement of the shock absorber regulator assembly directly acts on the hydraulic oil cavity, and by adjusting the flow and pressure of the hydraulic oil, precise control of the shock absorber hardness and vehicle body height is realized.

[0035] In this embodiment, the shock absorber regulator assembly includes a second inner cylinder 7, a second piston block 9 installed within the second inner cylinder 7, an inner positioning cylinder 10 arranged coaxially with the second inner cylinder 7, an inner guiding cylinder 12, and a driving member 11. The inner positioning cylinder 10 is sleeved outside the inner guiding cylinder 12, and the end of the inner positioning cylinder 10 abuts and is installed on the end face of the second inner cylinder 8. The output end of the driving member 11 (the output shaft of the output end is fitted and installed with the piston block) is connected and installed in cooperation with the second piston block 9, and the driving member can drive the second piston block 9 to reciprocate along the axial direction of the second inner cylinder.

[0036] The second inner cylinder serves as the main structure of the hydraulic oil cavity and is used to accommodate the second piston block 9 and the hydraulic oil 13. The second piston block 9 reciprocates along the axial direction of the second inner cylinder under the drive of the driving member 11, thereby regulating the flow and pressure of the hydraulic oil. The arrangement of the inner positioning cylinder and the inner guiding cylinder ensures the stability and precision of the movement of the second piston block. The driving member, as the power source, provides the driving force for the movement of the second piston block. The driving member can be a motor, a hydraulic cylinder, a pneumatic cylinder, etc. (as long as it can drive the piston block to reciprocate along the axial direction). Through the cooperation of the second inner cylinder, the second piston block, the inner positioning cylinder, the inner guiding cylinder, and the driving member, precise regulation of the hydraulic oil within the hydraulic oil cavity is achieved. The arrangement of the inner positioning cylinder and the inner guiding cylinder ensures the stability and precision of the second piston block during movement, avoiding adjustment errors caused by movement deviations. The introduction of the driving member makes the adjustment of the hydraulic oil more convenient. The operator can achieve precise regulation of the hydraulic oil by controlling the driving member without manual operation. This significantly improves the adjustment accuracy and operation convenience of the shock absorber, and solves the problems of insufficient adjustment accuracy and inconvenient operation of the hydraulic oil within the hydraulic oil cavity.

[0037] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not restrictive. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the purpose and scope of the technical solutions of the present invention, and they should all be covered within the scope of the claims of the present invention.

Claims

1. A rear shock absorber spring adjustment assembly for a motorcycle, characterized in that: It includes a positioning seat for installing a spring and a base sleeved on the positioning seat, and a hydraulic oil chamber for accommodating hydraulic oil is formed between the positioning seat and the base; a first shock absorber regulator and a second shock absorber regulator for controlling the hydraulic oil volume in the hydraulic oil chamber are connected and arranged on the base. The first shock absorber regulator includes a first outer cylinder, an upper end cover, a lower end cover arranged on the first outer cylinder, and a magnetorheological mechanism arranged in the first outer cylinder. The magnetorheological mechanism includes an inner cylinder installed on the inner end face of the upper end cover, a floating piston assembly slidably and adjustably arranged in the inner cylinder, and a magnetorheological assembly installed in cooperation with the inner cylinder. The floating piston assembly reciprocates axially to drive the magnetorheological fluid to form different circulation circuits through the magnetorheological assembly.

2. The motorcycle rear shock absorber spring adjustment assembly according to claim 1, characterized in that: The magnetorheological assembly includes an inner cylinder, a front end cover, a rear end cover installed in cooperation with the inner cylinder, an inner core installed in the inner cylinder, and an excitation coil wound around the inner core. An inner core opening is formed in the middle of the inner core. A magnetorheological gap for the flow of magnetorheological fluid is formed between the inner core and the inner cylinder. A radial opening communicating with the magnetorheological gap is formed in the inner core in the radial direction, and a radial valve structure for cooperating with the radial opening to open or close is arranged at the radial opening.

3. The motorcycle rear shock absorber spring adjustment assembly according to claim 2, characterized in that: The radial valve structure includes a positioning block fixedly installed on the inner core, an elastic valve sheet fixedly installed on the side of the positioning block and attached to the radial opening, and a guiding end head installed on the end face of the positioning block. The elastic valve sheet can bend around the guiding end head to open or close the radial opening.

4. The motorcycle rear shock absorber spring adjustment assembly according to claim 3, characterized in that: The guiding end head includes an upper guiding end head and a lower guiding end head. The positioning block is axially locked to the inner core through a locking rod. A locking hole for installing the locking rod is formed between the upper guiding end head and the lower guiding end head. Both the upper guiding end head and the lower guiding end head are made of elastic materials.

5. The motorcycle rear shock absorber spring adjustment assembly according to claim 2, characterized in that: An end cover opening for the flow of magnetorheological fluid is formed on the rear end cover, and an end cover valve for the one-way flow of magnetorheological fluid is installed at the end cover opening. A compensation slider is arranged between the rear end cover and the lower end cover.

6. The motorcycle rear shock absorber spring adjustment assembly according to claim 2, wherein: The floating piston assembly includes an inner guiding cylinder fixedly installed in cooperation with the upper end cover, a floating piston slidably and adjustably installed along the axial direction of the inner guiding cylinder, a piston connecting rod installed in cooperation with the floating piston and axially passing through the front end cover, and an inner pushing block arranged at the end of the piston connecting rod. The floating piston moves axially to drive the inner pushing block to move, thereby enabling the magnetorheological fluid to circulate.

7. The motorcycle rear shock absorber spring adjustment assembly according to claim 6, characterized in that: An annular airbag is arranged between the inner guiding cylinder and the first outer cylinder, and hydraulic oil for adjusting in cooperation with the hydraulic oil chamber is filled in the inner guiding cylinder.

8. The motorcycle rear shock absorber spring adjustment assembly according to claim 1, characterized in that: The second shock absorber regulator includes a second outer cylinder, a second upper end cover, a second lower end cover, a second inner cylinder installed in cooperation with the second outer cylinder, and a shock absorber regulator assembly arranged in the second outer cylinder. The shock absorber regulator assembly can move axially along the second outer cylinder to realize the adjustment of the hydraulic oil in the hydraulic oil chamber.

9. The motorcycle rear shock absorber spring adjustment assembly according to claim 8, characterized in that: The shock absorber regulator assembly includes a second inner cylinder, a second piston block installed inside the second inner cylinder, an inner positioning cylinder, an inner guiding cylinder coaxially arranged with the second inner cylinder, and a driving member. The inner positioning cylinder is sleeved outside the inner guiding cylinder and the end of the inner positioning cylinder abuts and is installed on the end face of the second inner cylinder. The output end of the driving member is connected and installed in cooperation with the second piston block, and the driving member can drive the second piston block to reciprocate along the axial direction of the second inner cylinder.

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