Damping-adjustable shock absorber

Abstract

The utility model relates to the technical field of shock absorbers, in particular to a damping-adjustable shock absorber, which comprises an oil storage cylinder component, a working cylinder, an oil return pipe and a piston rod component, the oil storage cylinder component comprises an oil storage cylinder, a base and a guide seat, the base and the guide seat are respectively arranged at two ends of the oil storage cylinder, and a damping adjusting component is arranged in the base. The damping adjusting assembly comprises a first damping adjusting assembly body and a second damping adjusting assembly body. The multi-section damping force adjusting device has the advantage that multi-section damping force adjusting is achieved.

Description

Technical Field

[0001] This utility model relates to the field of vehicle shock absorber technology, specifically to a damping adjustable shock absorber. Background Technology

[0002] Shock absorbers are crucial components of vehicles, and their performance directly affects ride comfort, handling stability, and safety. In the fields of automotive modification and suspension tuning, adjustable damping shock absorbers, with their superior performance and flexible adjustment capabilities, have gained popularity among car owners and modification enthusiasts.

[0003] Patent application CN200810069732.0 discloses an adjustable damping shock absorber, including a working cylinder (1), a bottom valve assembly (3), a piston rod (4), an oil reservoir assembly (6), and an oil seal (7). A damping adjustment assembly (9) is connected to the bottom of the oil reservoir assembly (6). There is a return oil pipe (2) between the working cylinder (1) and the oil reservoir (6-2). The piston assembly (5) is a one-way valve system structure in which oil can only flow from the lower chamber to the upper chamber. The guide seat (8) has an oil return hole for oil to flow from the working cylinder (1) through the return oil pipe (2) back to the oil reservoir. When the adjustment handle is turned, it drives the push valve to rotate. At the same time, the push valve moves forward along the axis of the fixed seat, causing the push valve to push the adjustment valve. As the damper advances along the axis of the inner hole of the base, the adjusting spring is compressed, and the push valve causes the wedge-shaped part at the front end of the adjusting valve to extend into the throttling orifice of the throttling pad by different lengths, thereby changing the effective area of ​​the oil flowing through the throttling orifice and ultimately changing the damping force of the shock absorber. However, this adjustable damping shock absorber has the following drawbacks in actual use: 1. Setting up a single damping adjustment component only allows for preliminary damping force adjustment of the shock absorber and cannot meet the requirement of eighteen-stage resistance adjustment; the damping adjustment method of the shock absorber is relatively simple. 2. When the adjusting handle is rotated, the connection between the adjusting handle and the fixed seat, and between the fixed seat and the push valve, is a threaded connection, which is a rigid connection. This affects the operating feel of the adjusting handle and also has a certain impact on the service life of the adjusting handle. Summary of the Invention

[0004] The technical problem to be solved by this utility model is to provide a damping adjustable shock absorber that addresses the shortcomings of the prior art and realizes multi-stage damping force adjustment.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a damping adjustable shock absorber, comprising an oil reservoir assembly, a working cylinder, an oil return pipe, and a piston rod assembly. The oil reservoir assembly includes an oil reservoir, a base and a guide seat disposed at both ends of the oil reservoir. The working cylinder is located inside the oil reservoir and coaxially arranged therewith. The oil return pipe is located between the working cylinder and the oil reservoir, and its two ends cooperate with the base and the guide seat, respectively. The piston rod assembly includes a piston located inside the working cylinder and a piston rod connected to the piston at one end. The end of the piston rod not connected to the piston extends out of the oil reservoir. A damping adjustment assembly is provided inside the base. The damping adjustment assembly includes a first damping adjustment assembly and a second damping adjustment assembly. The base is horizontally provided with adjustment mechanisms for the first damping adjustment assembly and the second damping adjustment assembly, respectively. The component is installed with a first installation channel and a second installation channel. The openings of the first installation channel and the second installation channel are both located on the outer circumference of the base. The base is also provided with a first oil passage connecting the first installation channel to the oil reservoir, a second oil passage connecting the first installation channel to the working cylinder, a third oil passage connecting the second installation channel to the return oil pipe, and a fourth oil passage connecting the second installation channel to the working cylinder. The guide seat is provided with a fifth oil passage connecting the working cylinder to the return oil pipe. The damping adjustment component includes an adjustment handle and an adjustment spring abutting against the adjustment handle. The end of the second oil passage connected to the first installation channel is a tapered end, located between the adjustment handle and the adjustment spring. A ball is embedded in the tapered end. A return spring is provided in the second oil passage to abut the ball against the tapered end.

[0006] The present invention, possessing the above-mentioned features, comprises a first damping adjustment component and a second damping adjustment component, along with multiple oil passages, arranged within the base. The oil flow rate within the corresponding oil passages is adjusted by rotating the adjustment handles of the first and second damping adjustment components. By freely combining the adjustment forces of the two sets of damping adjustment components, multi-stage adjustment of the shock absorber can be achieved. Furthermore, the ball bearings and return springs arranged within the second oil passages increase the adjustment methods for the oil flow rate within the shock absorber. Combining the ball bearings, return springs, and the two sets of damping adjustment components within the second oil passages, eighteen stages of damping adjustment of the shock absorber can be achieved, satisfying the driver's need for multi-stage adjustment of the shock absorber's damping force.

[0007] A further feature of this invention is that the first damping adjustment assembly includes a first adjustment handle and a first adjustment spring. The first adjustment handle includes a first adjustment cap, a first threaded assembly, a first pin screw, a first nut, a first connector, and a first joint. The first adjustment cap is located outside the first mounting channel. The first threaded assembly is threadedly connected to the first mounting channel. One end of the first pin screw is inserted into the first adjustment cap, and the other end is inserted into the first threaded assembly. The first adjustment cap has a set screw for fixing the first pin screw. The first nut is disposed inside the first threaded assembly and threadedly connected to the first pin screw. The inner cavity shape of the first threaded assembly is the same as the shape of the first nut. One end of the first connector extends into the first threaded assembly and abuts against the first pin screw, and the other end is inserted into the first joint. The first joint is inserted into the first adjustment spring. The end of the first adjustment spring not connected to the first joint abuts against the inner wall of the first mounting channel. The end of the first oil passage connected to the first mounting channel is located at the first adjustment spring. The tapered end of the second oil passage is located between the first adjustment spring and the first joint.

[0008] The present invention, having the above-mentioned features, is as follows: the first threaded assembly is fixed by being threadedly connected to the first mounting channel, and a first nut adapted to the shape of its inner cavity is inserted into the first threaded assembly. Therefore, when the first adjusting cap is rotated, the first pin screw can move forward or backward axially, thereby changing the compression of the first adjusting spring. By changing the compression of the first adjusting spring, the flow rate of oil in the first oil passage can be adjusted. In addition, since the second oil passage is located between the first connector and the first adjusting spring, the axial movement of the first connector can also adjust the flow rate of the second oil passage.

[0009] A further feature of this invention is that the first adjusting cap has two third mounting channels, each containing a first buffer spring and a first steel ball. One end of the first buffer spring abuts against the inner wall of the third mounting channel, and the other end abuts against the first steel ball. The first steel ball is located at the opening end of the third mounting channel. The end face of the first threaded fitting that abuts against the first adjusting cap has a plurality of first steel ball grooves that are adapted to the first steel ball.

[0010] The present invention with the above features: when adjusting the damping force, the first adjusting cap will rotate relative to the first threaded assembly, and the first steel ball set in the first adjusting cap will continuously fall into the adjacent first steel ball groove. Since the third mounting channel is provided with a corresponding first buffer spring, the rotation of the first adjusting cap will be accompanied by the mechanical sound of the steel ball falling into the groove, which improves the feel of the first adjusting cap when rotating and enhances the user experience.

[0011] A further feature of this invention is that the first connector includes a connector body and an insertion platform disposed at the end of the connector body. The connector body has an oil passage cavity, the opening of which is inserted into the first connector. Two spaced-apart protruding rings are provided on the outer circumferential surfaces at both ends of the connector body, and an annular groove for installing a sealing ring is formed between the two protruding rings. An oil passage hole communicating with the oil passage cavity is provided in the middle of the connector body. An oil passage gap is left between the middle of the connector body and the inner wall of the first mounting channel. A sixth oil passage channel communicating with the first mounting channel and the working cylinder is provided in the base. The connection end of the sixth oil passage channel and the first mounting channel is located in the middle of the connector body.

[0012] The present invention with the above features: because the sealing rings set at both ends of the connector body block the first installation channel of its location, the sixth oil passage is connected to the oil passage cavity in the connector body. As the first adjusting cap rotates, the first connector will move axially in the first installation channel, thereby changing the oil passage volume of the sixth oil passage to a certain extent. Through the structural design of the first connector and the position design of the sixth oil passage, the oil flow rate can be adjusted, and the number of damping gear adjustments can be increased.

[0013] A further feature of this invention is that the second oil passage has a recessed opening at one end of the base end face, and a spring seat is embedded in the recessed opening. One end of the reset spring abuts against the spring seat, and the other end abuts against the ball bearing.

[0014] The present invention, which has the above-mentioned features, has a spring seat provided at the port where the second oil passage connects to the base for fixing the reset spring.

[0015] A further feature of this invention is that the second damping adjustment assembly includes a second adjustment handle and a second adjustment spring. The second adjustment handle includes a second adjustment cap, a second threaded assembly, a second pin screw, a second nut, a second connector, and a second joint. The second adjustment cap is located outside the second mounting channel. The second threaded assembly is threadedly connected to the second mounting channel. One end of the second pin screw is inserted into the second adjustment cap, and the other end is inserted into the second threaded assembly. The second adjustment cap has a set screw for fixing the second pin screw. The second nut is located inside the second threaded assembly and is threadedly connected to the second pin screw. The inner cavity shape of the first threaded assembly is the same as that of the first nut. One end of the second connector extends into the second threaded assembly, and the other end is inserted into the second adjustment spring. The end of the second adjustment spring that is not connected to the second connector is inserted into the second joint. The connection end of the fourth oil passage and the second mounting channel is located at the connection between the second adjustment spring and the second joint.

[0016] The present invention, which has the above-mentioned features, is fixed by setting a second threaded assembly and a second mounting channel to be threadedly connected, and a second nut adapted to the shape of its inner cavity is inserted into the second threaded assembly. Therefore, when the second adjusting cap is rotated, the second pin can move forward or backward along the axial direction, thereby changing the compression of the second adjusting spring. By changing the compression of the second adjusting spring, the flow rate of the oil in the fourth oil passage can be adjusted. In addition, since the connection end of the third oil passage and the second mounting channel is located at the second joint, the axial movement of the second joint can also adjust the flow rate of the third oil passage.

[0017] A further feature of this invention is that the end of the second connector that is not connected to the second adjusting spring is provided with a second plug that is inserted into the second mounting channel. The outer circumferential surface of the second plug is evenly distributed with several arc-shaped grooves. The connection end of the third oil passage and the second mounting channel is located above the second plug.

[0018] The present invention, which has the above features, can push the second connector to move axially by rotating the second adjusting cap, and the oil flow rate in the third oil passage provided above the second plug can be changed with the movement of the second connector. The setting of this structure helps to realize the flow rate regulation of the third oil passage and increases the damping adjustment level; several arc-shaped grooves are provided on the outer peripheral surface of the second plug to facilitate the flow of oil.

[0019] A further feature of this invention is that the second adjusting cap has two fourth mounting channels, each containing a second buffer spring and a second steel ball. One end of the second buffer spring abuts against the inner wall of the fourth mounting channel, and the other end abuts against the second steel ball. The second steel ball is located at the opening end of the fourth mounting channel. Several second steel ball grooves that are adapted to the second steel ball are evenly distributed on the end face of the second threaded sleeve that abuts against the second adjusting cap.

[0020] The present invention with the above features: when adjusting the damping force, the second adjusting cap will rotate relative to the second threaded assembly, and the second steel ball set in the second adjusting cap will continuously fall into the adjacent second steel ball groove. Since the fourth installation channel is provided with a corresponding second buffer spring, the rotation of the second adjusting cap will be accompanied by the mechanical sound of the steel ball falling into the groove, which improves the feel of the second adjusting cap when rotating and enhances the user experience.

[0021] A further feature of this invention is that the guide seat has an air-filling channel connecting the fifth oil passage and the end face, and an end cap is threaded into the oil storage cylinder. One end face of the end cap is flush with the end face of the oil storage cylinder, and the other end face abuts against the end face of the guide seat.

[0022] The present invention, which has the above-mentioned features, has an air-filling channel for injecting nitrogen. Injecting nitrogen into the oil helps reduce the noise of the shock absorber during operation, provides a quieter driving environment, and can prevent oil aging, oxidation and evaporation, improve the rebound of the shock absorber, thereby extending the service life of the shock absorber.

[0023] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. Attached Figure Description

[0024] Figure 1 This is a structural schematic diagram of an embodiment of the present utility model.

[0025] Figure 2 This is a schematic diagram of the base structure of an embodiment of the present utility model.

[0026] Figure 3 This is a top view of the base of an embodiment of the present utility model.

[0027] Figure 4 for Figure 3 Sectional view of AA.

[0028] Figure 5 for Figure 3 A cross-sectional view of BB.

[0029] Figure 6 This is a bottom view of the guide seat in an embodiment of this utility model.

[0030] Figure 7 for Figure 6 A sectional view of CC.

[0031] Figure 8 This is a top view of the base of an embodiment of the present utility model.

[0032] Figure 9 for Figure 8 A sectional view of DD.

[0033] Figure 10 This is a schematic diagram of the structure of the first damping adjustment component in an embodiment of the present invention.

[0034] Figure 11 for Figure 10 A cross-sectional view of EE.

[0035] Figure 12 This is an exploded view of the first damping adjustment component according to an embodiment of the present invention.

[0036] Figure 13 This is a schematic diagram of the structure of the second damping adjustment component in an embodiment of the present invention.

[0037] Figure 14 for Figure 13A cross-sectional view of FF.

[0038] Figure 15 This is an exploded view of the second damping adjustment component according to an embodiment of the present invention.

[0039] Figure 16 This is a top view of an embodiment of the present utility model.

[0040] Figure 17 for Figure 16 A cross-sectional view of GG.

[0041] Figure 18 for Figure 16 A cross-sectional view of HH. Detailed Implementation

[0042] This specific embodiment is merely an explanation of the present utility model and is not intended to limit the present utility model. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but as long as they are within the scope of the claims of the present utility model, they are protected by patent law.

[0043] like Figure 1-18The damping adjustable shock absorber shown includes an oil reservoir assembly 10, a working cylinder 2, a return oil pipe 3, and a piston rod assembly 40. The oil reservoir assembly 10 includes an oil reservoir 11, a base 12 and a guide seat 13 respectively disposed at both ends of the oil reservoir 11. The working cylinder 2 is located inside the oil reservoir 11 and is coaxially arranged with it. The return oil pipe 3 is located between the working cylinder 2 and the oil reservoir 11, and its two ends are respectively engaged with the base 12 and the guide seat 13. The piston rod assembly 40 includes a piston 41 located inside the working cylinder 2, and one end of the piston rod 40 is engaged with the base 12 and the guide seat 13. The piston rod 42 is connected to the piston 41. The end of the piston rod 42 that is not connected to the piston 41 extends out of the oil reservoir 11. The base 12 is equipped with a damping adjustment assembly, which includes a first damping adjustment assembly 50 and a second damping adjustment assembly 60. The base 12 is horizontally provided with a first mounting channel 121 and a second mounting channel 122 for mounting the first damping adjustment assembly 50 and the second damping adjustment assembly 60, respectively. The openings of the first mounting channel 121 and the second mounting channel 122 are both located on the outer circumference of the base 12. The base 12 is also provided with a first oil passage 123 connecting the first mounting channel 121 and the oil reservoir 11, a second oil passage 124 connecting the first mounting channel 121 and the working cylinder 2, a third oil passage 125 connecting the second mounting channel 122 and the return oil pipe 3, and a fourth oil passage 126 connecting the second mounting channel 122 and the working cylinder 2. The guide seat 13 is provided with a fifth oil passage 131 connecting the working cylinder 2 and the return oil pipe 3. The damping adjustment assembly includes an adjustment handle and an adjustment mechanism. The adjusting spring abuts against the handle. The end of the second oil passage 124 connected to the first mounting channel 121 is tapered and located between the adjusting handle and the adjusting spring. A ball bearing 7 is embedded in the tapered end. A return spring 8 is provided in the second oil passage 124 to press the ball bearing 7 against the tapered end. A recessed opening 1241 is provided at one end of the second oil passage 124 on the end face of the base 12. A spring seat 9 is embedded in the recessed opening 1241. One end of the return spring 8 abuts against the spring seat 9, and the other end abuts against the ball bearing 7.

[0044] The first damping adjustment assembly 50 includes a first adjustment handle and a first adjustment spring 51. The first adjustment handle includes a first adjustment cap 52, a first threaded assembly 53, a first pin screw 54, a first nut 55, a first connector 56, and a first joint 57. The first adjustment cap 52 is located outside the first mounting channel 121. The first threaded assembly 53 is threadedly connected to the first mounting channel 121. One end of the first pin screw 54 is inserted into the first adjustment cap 52, and the other end is inserted into the first threaded assembly 53. The first adjustment cap 52 has a set screw (not shown in the figure) for fixing the first pin screw 54. The first nut 55 is disposed in the first threaded assembly. The first threaded assembly 53 is threadedly connected to the first pin screw 54. The inner cavity shape of the first threaded assembly 53 is the same as that of the first nut 55. One end of the first connector 56 extends into the first threaded assembly 53 and abuts against the first pin screw 54. The other end is inserted into the first connector 57. The first connector 57 is inserted into the first adjusting spring 51. The end of the first adjusting spring 51 that is not connected to the first connector 57 abuts against the inner wall of the first mounting channel 121. The end of the first oil passage 123 that is connected to the first mounting channel 121 is located at the first adjusting spring 51. The tapered end of the second oil passage 124 is located between the first adjusting spring 51 and the first connector 57.

[0045] The first adjusting cap 52 has two third mounting channels 521. The third mounting channel 521 has a first buffer spring 522 and a first steel ball 523. One end of the first buffer spring 522 abuts against the inner wall of the third mounting channel 521, and the other end abuts against the first steel ball 523. The first steel ball 523 is located at the open end of the third mounting channel 521. The end face of the first threaded fitting 53 that abuts against the first adjusting cap 52 has a plurality of first steel ball grooves 531 that are adapted to the first steel ball 523.

[0046] The first connector 56 includes a connector body 561 and an insertion platform 562 disposed at the end of the connector body 561. The connector body 561 has an oil passage cavity 563, the opening of which is inserted into the first connector 57. Two spaced protruding rings 564 are provided on the outer peripheral surfaces of both ends of the connector body 561. An annular groove 565 for installing a sealing ring is formed between the two protruding rings 564. An oil passage hole 566 communicating with the oil passage cavity 563 is provided in the middle of the connector body 561. An oil passage gap is left between the middle of the connector body 561 and the inner wall of the first mounting channel 121. The base 12 has a sixth oil passage 127 communicating with the first mounting channel 121 and the working cylinder 2. The connection end of the sixth oil passage 127 and the first mounting channel 121 is located in the middle of the connector body 561.

[0047] The second damping adjustment assembly 60 includes a second adjustment handle and a second adjustment spring 61. The second adjustment handle includes a second adjustment cap 62, a second threaded fitting 67, a second pin screw 63, a second nut 64, a second connector 65, and a second joint 66. The second adjustment cap 62 is located outside the second mounting channel 122. The second threaded fitting 67 is threadedly connected to the second mounting channel 122. One end of the second pin screw 63 is inserted into the second adjustment cap 62, and the other end is inserted into the second threaded fitting 67. The second adjustment cap 62 has a fixing pin screw inside. The set screw of 63 (not shown in the figure), the second nut 64 is set in the second threaded assembly 67 and threadedly connected to the second pin screw 63, the inner cavity shape of the first threaded assembly 53 is the same as the shape of the first nut 55, one end of the second connector 65 extends into the second threaded assembly 67, and the other end is inserted into the second adjusting spring 61, the end of the second adjusting spring 61 that is not connected to the second connector 65 is inserted into the second connector 66, and the connection end of the fourth oil passage 126 and the second mounting passage 122 is located at the connection between the second adjusting spring 61 and the second connector 66.

[0048] The second connector 66 is provided with a second plug 661 at one end that is not connected to the second adjusting spring 61. The second plug 661 is inserted into the second mounting channel 122. Several arc-shaped grooves 6611 are evenly distributed on the outer circumferential surface of the second plug 661. The connection end of the third oil passage 125 and the second mounting channel 122 is located above the second plug 661.

[0049] The second adjusting cap 62 has two fourth mounting channels 621. The fourth mounting channel 621 has a second buffer spring 622 and a second steel ball 623. One end of the second buffer spring 622 abuts against the inner wall of the fourth mounting channel 621, and the other end abuts against the second steel ball 623. The second steel ball 623 is located at the open end of the fourth mounting channel 621. The end face of the second threaded fitting 67 that abuts against the second adjusting cap 62 has a plurality of second steel ball grooves 671 that are adapted to the second steel ball 623.

[0050] The guide seat 13 is provided with an air passage 132 that connects the fifth oil passage 131 to the end face. An end cap 14 is screwed into the oil reservoir 11. One end face of the end cap 14 is flush with the end face of the oil reservoir 11, and the other end face abuts against the end face of the guide seat 13.

[0051] When the damping force of the shock absorber needs to be adjusted, operating the first and second damping adjustment components simultaneously allows for eighteen levels of damping force adjustment. Rotating the first adjusting cap causes the first pin screw to move forward or backward axially, changing the compression of the first adjusting spring. Changing the compression of the first adjusting spring adjusts the oil flow rate in the first oil passage. Furthermore, since the second oil passage is located between the first connector and the first adjusting spring, axial movement of the first connector also adjusts the flow rate in the second oil passage. As the first adjusting cap rotates, the first connecting piece moves axially within the first mounting channel, thus altering the oil flow rate in the sixth oil passage to some extent. Rotating the second adjusting cap causes the second pin to move forward or backward axially, changing the compression of the second adjusting spring. Changing the compression of the second adjusting spring adjusts the oil flow rate in the fourth oil passage. Additionally, since the connection between the third oil passage and the second mounting channel is located at the second connector, axial movement of the second connector also adjusts the flow rate in the third oil passage.

Claims

1. A damping adjustable shock absorber, comprising an oil reservoir assembly, a working cylinder, an oil return pipe, and a piston rod assembly, wherein the oil reservoir assembly includes an oil reservoir, a base and a guide seat disposed at both ends of the oil reservoir, the working cylinder is located inside the oil reservoir and coaxially arranged therewith, the oil return pipe is located between the working cylinder and the oil reservoir, and both ends of the oil return pipe are respectively engaged with the base and the guide seat, the piston rod assembly includes a piston located inside the working cylinder, a piston rod connected at one end to the piston, and the end of the piston rod not connected to the piston extending out of the oil reservoir, and a damping adjustment assembly is provided inside the base, characterized in that: The damping adjustment assembly includes a first damping adjustment assembly and a second damping adjustment assembly. The base has a first mounting channel and a second mounting channel horizontally arranged for mounting the first and second damping adjustment assemblies, respectively. The openings of the first and second mounting channels are both located on the outer periphery of the base. The base also has a first oil passage connecting the first mounting channel to the oil reservoir, a second oil passage connecting the first mounting channel to the working cylinder, a third oil passage connecting the second mounting channel to the return oil pipe, and a fourth oil passage connecting the second mounting channel to the working cylinder. The guide seat has a fifth oil passage connecting the working cylinder to the return oil pipe. The damping adjustment assembly includes an adjustment handle and an adjustment spring abutting against the adjustment handle. One end of the second oil passage connected to the first mounting channel is a tapered end, located between the adjustment handle and the adjustment spring. A ball is embedded in the tapered end, and a return spring is provided in the second oil passage to press the ball against the tapered end.

2. The damping adjustable vibration damper according to claim 1, characterized in that: The first damping adjustment assembly includes a first adjustment handle and a first adjustment spring. The first adjustment handle includes a first adjustment cap, a first threaded assembly, a first pin screw, a first nut, a first connector, and a first joint. The first adjustment cap is located outside the first mounting channel. The first threaded assembly is threadedly connected to the first mounting channel. One end of the first pin screw is inserted into the first adjustment cap, and the other end is inserted into the first threaded assembly. The first adjustment cap has a set screw for fixing the first pin screw. The first nut is disposed in the first threaded assembly and threadedly connected to the first pin screw. The inner cavity shape of the first threaded assembly is the same as the shape of the first nut. One end of the first connector extends into the first threaded assembly and abuts against the first pin screw, and the other end is inserted into the first joint. The first joint is inserted into the first adjustment spring. The end of the first adjustment spring not connected to the first joint abuts against the inner wall of the first mounting channel. The end of the first oil passage connected to the first mounting channel is located at the first adjustment spring. The tapered end of the second oil passage is located between the first adjustment spring and the first joint.

3. The damping adjustable vibration damper according to claim 2, characterized in that: The first adjusting cap has two third mounting channels. The third mounting channels are equipped with a first buffer spring and a first steel ball. One end of the first buffer spring abuts against the inner wall of the third mounting channel, and the other end abuts against the first steel ball. The first steel ball is located at the opening end of the third mounting channel. The end face of the first threaded fitting that abuts against the first adjusting cap has a plurality of first steel ball grooves that are adapted to the first steel ball.

4. The damping adjustable vibration damper according to claim 2, characterized in that: The first connector includes a connector body and an insertion platform disposed at the end of the connector body. The connector body has an oil passage cavity, the opening of which is inserted into the first connector. Two spaced-apart protruding rings are provided on the outer peripheral surfaces of both ends of the connector body, and an annular groove for installing a sealing ring is formed between the two protruding rings. An oil passage hole communicating with the oil passage cavity is provided in the middle of the connector body. An oil passage gap is left between the middle of the connector body and the inner wall of the first mounting channel. The base has a sixth oil passage communicating with the first mounting channel and the working cylinder. The connection end of the sixth oil passage and the first mounting channel is located in the middle of the connector body.

5. The damping adjustable vibration damper according to claim 1, characterized in that: The second oil passage has a recessed opening at one end of the base end face, and a spring seat is embedded in the recessed opening. One end of the reset spring abuts against the spring seat, and the other end abuts against the ball.

6. The damping adjustable vibration damper according to claim 1, characterized in that: The second damping adjustment assembly includes a second adjustment handle and a second adjustment spring. The second adjustment handle includes a second adjustment cap, a second threaded assembly, a second pin screw, a second nut, a second connector, and a second joint. The second adjustment cap is located outside the second mounting channel. The second threaded assembly is threadedly connected to the second mounting channel. One end of the second pin screw is inserted into the second adjustment cap, and the other end is inserted into the second threaded assembly. The second adjustment cap has a set screw for fixing the second pin screw. The second nut is located inside the second threaded assembly and is threadedly connected to the second pin screw. The inner cavity shape of the first threaded assembly is the same as that of the first nut. One end of the second connector extends into the second threaded assembly, and the other end is inserted into the second adjustment spring. The end of the second adjustment spring that is not connected to the second connector is inserted into the second joint. The connection end of the fourth oil passage and the second mounting channel is located at the connection between the second adjustment spring and the second joint.

7. The damping adjustable vibration damper according to claim 6, characterized in that: The second connector has a second plug that is inserted into the second mounting channel at the end that is not connected to the second adjusting spring. The outer circumferential surface of the second plug is evenly distributed with several arc-shaped grooves. The connection end of the third oil passage and the second mounting channel is located above the second plug.

8. The damping adjustable vibration damper according to claim 6, characterized in that: The second adjusting cap has two fourth mounting channels. The fourth mounting channels are equipped with a second buffer spring and a second steel ball. One end of the second buffer spring abuts against the inner wall of the fourth mounting channel, and the other end abuts against the second steel ball. The second steel ball is located at the opening end of the fourth mounting channel. The end face of the second threaded sleeve that abuts against the second adjusting cap has a plurality of second steel ball grooves that are adapted to the second steel ball.

9. The damping adjustable vibration damper according to claim 1, characterized in that: The guide seat is provided with an air inlet channel connecting the fifth oil passage and the end face. An end cap is screwed into the oil storage cylinder. One end face of the end cap is flush with the end face of the oil storage cylinder, and the other end face abuts against the end face of the guide seat.

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