Front fork shock absorber and hydraulic pressure adjusting device therefor

Abstract

The present invention provides a front fork shock absorber and an oil pressure adjusting device thereof. The front fork shock absorber has a front fork spring and an oil pressure adjusting device. One end of the front fork spring is connected to the oil pressure adjusting device. The oil pressure adjusting device has a preload adjusting mechanism, a connecting pipe, an oil pressure adjusting mechanism and a working fluid. The preload adjusting mechanism has a preload adjusting member. The preload adjusting member is movably arranged in the preload adjusting mechanism and connected to one end of the front fork spring. The connecting pipe is connected to the preload adjusting mechanism. The oil pressure adjusting mechanism is arranged at the other end of the connecting pipe and has an oil pressure adjusting member. The oil pressure adjusting member is arranged in the oil pressure adjusting mechanism. The working fluid is flowably filled in the preload adjusting mechanism, the connecting pipe and the oil pressure adjusting mechanism, whereby the user can adjust the oil pressure adjusting member to make the working fluid push the preload adjusting member to compress the front fork spring without disassembling the vehicle shell.

Description

Technical Field

[0001] This invention relates to a shock absorber, and more particularly to a front fork shock absorber and its hydraulic pressure adjustment device. Background Technology

[0002] Existing fork shock absorbers consist of an outer tube, a fork spring, and an inner tube. The outer tube is fitted over the top of the inner tube and has a top cap, with the top cap and inner tube located at opposite ends of the outer tube. The fork spring is housed within the outer tube and rests against the inner tube and top cap. When the fork shock absorber compresses, the inner tube pushes upwards towards the inner part of the outer tube, compressing the fork spring. When the fork shock absorber rebounds, the inner tube moves downwards away from the inner part of the outer tube, releasing the fork spring.

[0003] To prevent the fork spring from compressing immediately upon vibration, users typically add preload to it. Specifically, this is achieved by rotating the top cover to compress the fork spring closer to the inner tube. However, most existing fork shock absorbers are mounted inside the chassis, requiring the chassis to be removed to adjust the top cover if the user wants to adjust the preload, which is quite inconvenient.

[0004] Therefore, proposing a better improvement plan is an urgent problem that the industry needs to solve. Summary of the Invention

[0005] The main objective of this invention is to propose a front fork shock absorber and its hydraulic adjustment device, which solves the problem that existing front fork shock absorbers are mostly installed in the vehicle body, and if the user wants to adjust the preload, the vehicle body must be disassembled first to adjust the top cover, which is inconvenient.

[0006] To achieve the above objectives, the present invention provides a hydraulic pressure adjustment device for mounting on a front fork shock absorber, the front fork shock absorber having an outer tube, an inner tube, and a front fork spring; the inner tube is movably inserted through one end of the outer tube, and the front fork spring is disposed within the outer tube; the hydraulic pressure adjustment device has:

[0007] A preload adjustment mechanism is disposed at the other end of the outer tube relative to the inner tube, and has the following features:

[0008] A preload adjustment housing is disposed on the outer tube and has a preload internal space;

[0009] A preload adjustment member is movably disposed in the preload interior space and protrudes outside the preload interior space and is connected to one end of the fork spring;

[0010] A connecting pipe, one end of which is connected to the preload adjustment mechanism, and the connecting pipe is connected to the preload internal space of the preload adjustment housing;

[0011] A hydraulic pressure adjustment mechanism is disposed at the other end of the connecting pipe relative to the preload adjustment mechanism, and has the following features:

[0012] A hydraulic adjustment housing having a hydraulic internal space;

[0013] A hydraulic pressure adjusting component is disposed on the hydraulic pressure adjusting housing and can adjust the size of the internal space of the hydraulic pressure.

[0014] A working fluid is fluidly filled in the preload internal space, the connecting pipe and the hydraulic internal space. When the hydraulic adjustment component compresses the hydraulic internal space, the working fluid can push the preload adjustment component.

[0015] As described above, the hydraulic pressure adjusting device, wherein the preload adjusting housing has:

[0016] An inner cover is located inside the outer tube, and the preloaded internal space is located within the inner cover;

[0017] An outer cover is detachably connected to the inner cover and communicates with the connecting pipe and the preloaded internal space.

[0018] As described above, the outer cover and the inner cover are rotatable relative to each other, and when the outer cover and the inner cover rotate relative to each other, the outer cover and the inner cover remain in communication.

[0019] As described above, the hydraulic pressure adjusting device, wherein...

[0020] The inner cover has:

[0021] A ring groove is provided on the side of the inner cover near the outer cover;

[0022] At least one internal preload channel, which connects the annular groove and the preload internal space;

[0023] The outer cover has:

[0024] At least one external preload channel is connected to the connecting pipe and the annular groove.

[0025] As described above, the hydraulic pressure adjusting device, wherein the preload adjusting mechanism has:

[0026] A sealing element is disposed between the preload adjustment housing and the outer tube, and is sealed and fitted to the preload adjustment housing and the outer tube.

[0027] As described above, the hydraulic pressure adjusting device comprises:

[0028] A hydraulic pressure adjusting shaft extends through one end of the hydraulic pressure adjusting housing;

[0029] A hydraulic moving component is screwed onto the hydraulic adjusting shaft and located in the internal space of the hydraulic shaft, and can move axially along the hydraulic adjusting shaft as the hydraulic adjusting shaft rotates.

[0030] As described above, the hydraulic pressure adjusting device, wherein...

[0031] A manual knob is fitted onto the hydraulic pressure adjusting shaft and can rotate the hydraulic pressure adjusting shaft.

[0032] The fork shock absorber proposed in this invention has the following characteristics:

[0033] One outer tube;

[0034] An inner tube is movably inserted through one end of the outer tube;

[0035] A fork spring is disposed in the outer tube;

[0036] A hydraulic pressure regulating device is installed on the outer pipe and has the following functions:

[0037] A preload adjustment mechanism is disposed at the other end of the outer tube relative to the inner tube, and has the following features:

[0038] A preload adjustment housing is disposed on the outer tube and has a preload internal space;

[0039] A preload adjustment member is movably disposed in the preload interior space and protrudes outside the preload interior space and is connected to one end of the fork spring;

[0040] A connecting pipe, one end of which is connected to the preload adjustment mechanism, and the connecting pipe is connected to the preload internal space of the preload adjustment housing;

[0041] A hydraulic pressure adjustment mechanism is disposed at the other end of the connecting pipe relative to the preload adjustment mechanism, and has the following features:

[0042] A hydraulic adjustment housing having a hydraulic internal space;

[0043] A hydraulic pressure adjusting component is disposed on the hydraulic pressure adjusting housing and can adjust the size of the internal space of the hydraulic pressure.

[0044] A working fluid is fluidly filled in the preload internal space, the connecting pipe and the hydraulic internal space. When the hydraulic adjustment component compresses the hydraulic internal space, the working fluid can push the preload adjustment component.

[0045] In use, the front fork shock absorber and preload adjustment mechanism are installed inside the vehicle body, while the connecting pipe connected to the preload adjustment mechanism is pulled out of the body, leaving the hydraulic adjustment mechanism at the other end of the connecting pipe outside the body. When the user wants to compress the front fork spring, the hydraulic moving member moves axially along the hydraulic adjustment shaft, compressing the internal hydraulic space. At this time, the working fluid is squeezed from the internal hydraulic space to the internal preload space, expanding the internal preload space and pushing the preload adjustment member to compress the front fork spring. Thus, the user can adjust the hydraulic adjustment member without disassembling the vehicle body, and the change in hydraulic pressure pushes the preload adjustment member to compress the front fork spring. Attached Figure Description

[0046] Figure 1 This is a perspective view of the present invention;

[0047] Figure 2 This is a cross-sectional view of the present invention;

[0048] Figure 3 This is a perspective view of a preload adjustment mechanism for a fork spring when it is extended according to the present invention.

[0049] Figure 4 This is a perspective view of the preload adjustment mechanism of the fork spring of the present invention when compressed;

[0050] Figure 5 This is a perspective view of a hydraulic pressure adjustment mechanism for the front fork spring of the present invention during compression;

[0051] Figure 6 This is a perspective view of the hydraulic pressure adjustment mechanism of the fork spring of the present invention when it is extended;

[0052] Figure 7 This is a partially exploded view of the present invention;

[0053] Figure 8 This is an exploded view of a preload adjustment housing according to the present invention. Detailed Implementation

[0054] Please refer to Figure 1 and Figure 2 This invention proposes a front fork shock absorber, comprising an outer tube 10, an inner tube 20, a front fork spring 30, and a hydraulic pressure adjustment device 40. The inner tube 20 is movably inserted through one end of the outer tube 10. The front fork spring 30 is disposed within the outer tube 10. The hydraulic pressure adjustment device 40 is connected to the other end of the outer tube 10 relative to the inner tube 20, and the front fork spring 30 is disposed between the inner tube 20 and the hydraulic pressure adjustment device 40.

[0055] Please refer to Figures 1 to 3The hydraulic pressure adjustment device 40 has a preload adjustment mechanism 41, a connecting pipe 42, a hydraulic pressure adjustment mechanism 43, and a working fluid 44. The preload adjustment mechanism 41 is located at the other end of the outer pipe 10 relative to the inner pipe 20, and has a preload adjustment housing 411, a preload adjustment component 412, and a sealing component 413.

[0056] Please refer to Figure 3 , Figure 7 as well as Figure 8 A preload adjustment housing 411 is disposed on the outer tube 10 and has a preload internal space. In this embodiment, the preload adjustment housing 411 has an inner cover 4111 and an outer cover 4112. The inner cover 4111 is located inside the outer tube 10, and the preload internal space is located in the inner cover 4111. The inner cover 4111 has an annular groove 4113 and at least one inner preload channel 4114. The annular groove 4113 is disposed on the side of the inner cover 4111 near the outer cover 4112, and the inner preload channel 4114 communicates with the annular groove 4113 and the preload internal space.

[0057] The outer cover 4112 is detachably connected to the inner cover 4111 and communicates with the connecting pipe 42 and the preload internal space. The outer cover 4112 and the inner cover 4111 are rotatable relative to each other, and the outer cover 4112 has at least one external preload channel 4115. The external preload channel 4115 communicates with the connecting pipe 42 and the annular groove 4113. When the outer cover 4112 and the inner cover 4111 rotate relative to each other, the external preload channel 4115 remains connected to the annular groove 4113 even as the outer cover 4112 rotates, thereby maintaining communication between the outer cover 4112 and the inner cover 4111.

[0058] The preload adjustment member 412 is movably disposed within the preload internal space and protrudes outside the preload internal space, and is connected to one end of the fork spring 30. The seal member 413 is disposed between the preload adjustment housing 411 and the outer tube 10, and is sealed and fitted to the preload adjustment housing 411 and the outer tube 10.

[0059] Please refer to Figure 5 The hydraulic pressure adjustment mechanism 43 is located at the other end of the connecting pipe 42 relative to the preload adjustment mechanism 41, and has a hydraulic pressure adjustment housing 431 and a hydraulic pressure adjustment component 432. The hydraulic pressure adjustment housing 431 has an internal hydraulic space. The hydraulic pressure adjustment component 432 is disposed on the hydraulic pressure adjustment housing 431 and can adjust the size of the internal hydraulic space. In this embodiment, the hydraulic pressure adjustment component 432 has a hydraulic pressure adjustment shaft 4321, a hydraulic pressure moving component 4322, and a manual knob 4323.

[0060] A hydraulic adjustment shaft 4321 passes through one end of the hydraulic adjustment housing 431. A hydraulic moving part 4322 is screwed onto the hydraulic adjustment shaft 4321 and is located within the hydraulic internal space, and can move axially along the hydraulic adjustment shaft 4321 as the hydraulic adjustment shaft 4321 rotates. A manual knob 4323 is sleeved on the hydraulic adjustment shaft 4321 and can rotate the hydraulic adjustment shaft 4321. In other embodiments, the hydraulic adjustment part 432 may not have a manual knob 4323, and a tool may be used to rotate the hydraulic adjustment shaft 4321 to adjust the size of the hydraulic internal space.

[0061] The working fluid 44 can flowably fill the preload internal space, the connecting pipe 42 and the hydraulic internal space. When the hydraulic adjustment component 432 compresses the hydraulic internal space, it can push the preload adjustment component 412 through the working fluid 44.

[0062] In use, the front fork shock absorber and preload adjustment mechanism 41 are installed inside the vehicle body, while the connecting pipe 42 connected to the preload adjustment mechanism 41 is pulled out of the vehicle body, leaving the hydraulic adjustment mechanism 43 at the other end of the connecting pipe 42 outside the vehicle body. Please refer to... Figure 4 and Figure 5 When the user wants to compress the fork spring 30, they can turn the manual knob 4323 or use a tool to turn the hydraulic adjustment shaft 4321, causing the hydraulic moving part 4322 to move axially along the hydraulic adjustment shaft 4321 and compress the internal hydraulic space. At this time, the working fluid 44 will start from the internal hydraulic space, sequentially passing through the connecting pipe 42, the outer preload channel 4115 of the outer pipe 10, the annular groove 4113 of the inner cover 4111, and the inner preload channel 4114 of the inner cover 4111, flowing into the preload internal space, expanding the preload internal space, and pushing the preload adjustment part 412 to compress the fork spring 30. Please refer to... Figure 3 and Figure 6 To extend the fork spring 30, the manual knob 4323 can be turned in the opposite direction or a tool can be used to rotate the hydraulic adjustment shaft 4321, causing the hydraulic moving part 4322 to move axially along the hydraulic adjustment shaft 4321 and expand the internal hydraulic space. At this time, the working fluid 44 will flow back from the preload internal space to the internal hydraulic space due to the reduction in the internal hydraulic space, thereby reducing the pressure on the fork spring 30.

[0063] The advantage of this invention is that the hydraulic pressure adjustment mechanism 43, which controls the compression of the front fork spring 30, can be installed outside the vehicle body through the connecting pipe 42. Therefore, the user can adjust the hydraulic pressure adjustment member 432 without disassembling the vehicle body, and use the change in hydraulic pressure to push the preload adjustment member 412 to compress the front fork spring 30.

[0064] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the technical solution of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention shall still fall within the scope of the technical solution of the present invention.

Claims

1. A hydraulic pressure regulating device, characterized in that, For mounting on a front fork shock absorber, the front fork shock absorber having an outer tube, an inner tube, and a front fork spring; the inner tube is movably inserted through one end of the outer tube, and the front fork spring is disposed within the outer tube; the hydraulic pressure adjustment device has: A preload adjustment mechanism is disposed at the other end of the outer tube relative to the inner tube, and has the following features: A preload adjustment housing is disposed on the outer tube and has a preload internal space; A preload adjustment member is movably disposed in the preload interior space and protrudes outside the preload interior space and is connected to one end of the fork spring; A connecting pipe, one end of which is connected to the preload adjustment mechanism, and the connecting pipe is connected to the preload internal space of the preload adjustment housing; A hydraulic pressure adjustment mechanism is disposed at the other end of the connecting pipe relative to the preload adjustment mechanism, and has the following features: A hydraulic adjustment housing having a hydraulic internal space; A hydraulic pressure adjusting component is disposed on the hydraulic pressure adjusting housing and can adjust the size of the internal space of the hydraulic pressure. A working fluid is fluidly filled in the preload internal space, the connecting pipe and the hydraulic internal space. When the hydraulic adjustment component compresses the hydraulic internal space, the working fluid can push the preload adjustment component.

2. The hydraulic pressure adjusting device as described in claim 1, characterized in that, The preload adjustment housing has: An inner cover is located inside the outer tube, and the preloaded internal space is located within the inner cover; An outer cover is detachably connected to the inner cover and communicates with the connecting pipe and the preloaded internal space.

3. The hydraulic pressure adjusting device as described in claim 2, characterized in that, The outer cover and the inner cover can rotate relative to each other, and when the outer cover and the inner cover rotate relative to each other, the outer cover and the inner cover remain in communication.

4. The hydraulic pressure adjusting device as described in claim 3, characterized in that, The inner cover has: A ring groove is provided on the side of the inner cover near the outer cover; At least one internal preload channel, which connects the annular groove and the preload internal space; The outer cover has: At least one external preload channel is connected to the connecting pipe and the annular groove.

5. The hydraulic pressure adjusting device as described in any one of claims 1 to 4, characterized in that, The preload adjustment mechanism has the following features: A sealing element is disposed between the preload adjustment housing and the outer tube, and is sealed and fitted to the preload adjustment housing and the outer tube.

6. The hydraulic pressure adjusting device as described in any one of claims 1 to 4, characterized in that, The hydraulic pressure adjustment component has the following features: A hydraulic pressure adjusting shaft extends through one end of the hydraulic pressure adjusting housing; A hydraulic moving component is screwed onto the hydraulic adjusting shaft and located in the internal space of the hydraulic shaft, and can move axially along the hydraulic adjusting shaft as the hydraulic adjusting shaft rotates.

7. The hydraulic pressure adjusting device as described in claim 6, characterized in that, A manual knob is fitted onto the hydraulic pressure adjusting shaft and can rotate the hydraulic pressure adjusting shaft.

8. A front fork shock absorber, characterized in that, It contains One outer tube; An inner tube is movably inserted through one end of the outer tube; A fork spring is disposed in the outer tube; A hydraulic pressure regulating device is installed on the outer pipe and has the following functions: A preload adjustment mechanism is disposed at the other end of the outer tube relative to the inner tube, and has the following features: A preload adjustment housing is disposed on the outer tube and has a preload internal space; A preload adjustment member is movably disposed in the preload interior space and protrudes outside the preload interior space and is connected to one end of the fork spring; A connecting pipe, one end of which is connected to the preload adjustment mechanism, and the connecting pipe is connected to the preload internal space of the preload adjustment housing; A hydraulic pressure adjustment mechanism is disposed at the other end of the connecting pipe relative to the preload adjustment mechanism, and has the following features: A hydraulic adjustment housing having a hydraulic internal space; A hydraulic pressure adjusting component is disposed on the hydraulic pressure adjusting housing and can adjust the size of the internal space of the hydraulic pressure. A working fluid is fluidly filled in the preload internal space, the connecting pipe and the hydraulic internal space. When the hydraulic adjustment component compresses the hydraulic internal space, the working fluid can push the preload adjustment component.

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