Manual regulating valve and shock absorber

Abstract

The utility model provides a manual regulating valve and a shock absorber. The manual regulating valve comprises a valve seat, a valve body, a valve element and a rotating device. The valve body is arranged on the valve seat, the valve body is provided with an oil passing channel communicated with the outside, the valve element is movably arranged in the oil passing channel, the rotating device is rotatably arranged on the valve seat, the rotating device is connected with the valve element, and the rotating device is used for rotating under the action of external force and driving the valve element to move so as to adjust the oil passing amount of the oil passing channel; the rotating device is provided with a limiting structure, the limiting structure comprises a limiting column and a limiting groove, the limiting column is movably arranged in the limiting groove, and the limiting column and the limiting groove are matched to limit the moving distance of the valve element; one of the limiting column and the limiting groove is arranged on the rotating device, and the other one of the limiting column and the limiting groove is arranged on the valve body. Or one of the limiting column and the limiting groove is arranged on the rotating device, and the other one is arranged on the valve seat. According to the invention, the accuracy of the manual regulating valve for regulating the oil passing quantity is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of shock absorbers, in particular to a manual adjusting valve and a shock absorber. BACKGROUND

[0002] The adjusting valve on a vehicle shock absorber is a key component for controlling the damping force of the shock absorber. By adjusting the oil flow or pressure, the oil flow rate is controlled, thereby adjusting the damping force. For example, increasing the passage area can reduce the damping force, and reducing the passage area can increase the damping force.

[0003] The adjusting valve of the prior art lacks objective adjusting basis when adjusting the oil passing amount, resulting in errors between the actual damping force and the expected effect, and the complex road conditions and personalized driving needs cannot be accurately adapted. CONTENT OF THE UTILITY MODEL

[0004] In order to overcome the defects of the prior art, the present application provides a manual adjusting valve and a shock absorber.

[0005] The specific technical solutions are as follows:

[0006] A manual adjusting valve comprises a valve seat, a valve body, a valve core and a rotating device;

[0007] The valve body is arranged on the valve seat, and the valve body has an oil passing channel communicating with the outside. The valve core is movably arranged in the oil passing channel. The rotating device is rotatably arranged on the valve seat and connected with the valve core. The rotating device is used for rotating and moving the valve core under the action of external force, so as to adjust the oil passing amount of the oil passing channel.

[0008] The rotating device is provided with a limiting structure, which comprises a limiting column and a limiting groove. The limiting column is movably arranged in the limiting groove. The limiting column and the limiting groove cooperate to limit the movement distance of the valve core.

[0009] Among them, one of the limiting column and the limiting groove is arranged on the rotating device, and the other is arranged on the valve body; or one of the limiting column and the limiting groove is arranged on the rotating device, and the other is arranged on the valve seat.

[0010] In one embodiment, one of the limiting column and the limiting groove is arranged at the end of the rotating device, and the other is arranged at the end of the valve body.

[0011] Or, one of the limiting column and the limiting groove is arranged at the end of the rotating device, and the other is arranged at the end of the valve seat.

[0012] Or, one of the limiting column and the limiting slot is arranged on the side of the rotating device, and the other is arranged on the side of the valve seat.

[0013] In one embodiment, the rotating device comprises a tail cover and an adjusting disc, the valve core is connected with the tail cover through the adjusting disc, the limiting slot is arranged on the inner end surface of the tail cover and exposed to the periphery of the adjusting disc, the limiting column is arranged on the end of the valve seat and close to the tail cover, and the limiting column is located in the limiting slot.

[0014] In one embodiment, the rotating device comprises a tail cover and an adjusting disc, the valve core is connected with the tail cover through the adjusting disc, the limiting slot is arranged on the inner end surface of the tail cover and exposed to the periphery of the adjusting disc, the limiting column is arranged on the end of the valve seat and close to the tail cover, and the limiting column is located in the limiting slot.

[0015] In one embodiment, the rotating device comprises a tail cover and an adjusting disc, the valve core is connected with the tail cover through the adjusting disc, the limiting slot is arranged on the inner end surface of the tail cover and exposed to the periphery of the adjusting disc, the limiting column is arranged on the end of the valve seat and close to the tail cover, and the limiting column is located in the limiting slot.

[0016] In one embodiment, the limiting slot is provided with a stop surface at both ends, and the stop surface is used to stop the limiting column.

[0017] In one embodiment, one of the valve body and the rotating device is provided with a positioning member, and the other is provided with a plurality of positioning slots, the positioning member is used to alternately enter a plurality of the positioning slots during rotation of the rotating device.

[0018] In one embodiment, the positioning member comprises an elastic member and a clamping member, the elastic member is used to be compressed and contracted when the clamping member leaves the positioning slot, and the elastic member is reset and pushes the clamping member to be clamped in the positioning slot when the clamping member enters the positioning slot.

[0019] In one embodiment, the valve seat forms a first containing channel, a second containing channel and a third containing channel with gradually increasing inner diameters;

[0020] The valve body has a second valve body section and a third valve body section with gradually increasing outer diameters, the second valve body section is sleeved with a sealing member, and the sealing member is in contact with the third valve body section;

[0021] The second valve body section is located in the first containing channel, the sealing member is located in the second containing channel, and the third valve body section is located in the third containing channel.

[0022] In one embodiment, the rotating device is connected to the valve core by a fastener, the rotating device is provided with a groove, the groove bottom is provided with a through hole penetrating the rotating device, the fastener is connected to the valve core through the through hole, and the groove is used to accommodate a cover to cover the fastener.

[0023] In one embodiment, the rotating device is provided with an identification part for indicating the oil passing amount of the oil passing channel.

[0024] In one embodiment, the rotating device is provided with a plurality of action grooves, and the plurality of action grooves are circumferentially arranged on the rotating device.

[0025] A shock absorber comprises a first cylinder, a second cylinder, and a manual adjusting valve as described in any of the above embodiments, the valve body of the manual adjusting valve is arranged on the first cylinder, the valve seat of the manual adjusting valve is arranged on the second cylinder, and the first cylinder and the second cylinder are communicated through the flow passage of the manual adjusting valve.

[0026] In one embodiment, the first cylinder is provided with a connecting part, the connecting part has a first inner diameter passage and a second inner diameter passage with increasing inner diameters, the valve body has a first valve body section and a second valve body section with increasing outer diameters, the first valve body section is located in the first inner diameter passage, and the second valve body section is located in the second inner diameter passage.

[0027] The present application has at least the following beneficial effects:

[0028] The present application provides a manual adjusting valve, which comprises a valve seat, a valve body, a valve core, and a rotating device; the valve body is arranged on the valve seat, and the valve body has an oil passing channel communicated with the outside; the valve core is movably arranged in the oil passing channel; the rotating device is rotatably arranged on the valve seat and connected to the valve core; the rotating device is used to rotate and drive the valve core to move under the action of external force, so as to adjust the oil passing amount of the oil passing channel; the rotating device is provided with a limiting structure, the limiting structure comprises a limiting column and a limiting groove, the limiting column is movably arranged in the limiting groove, and the limiting column and the limiting groove cooperate to limit the moving distance of the valve core; one of the limiting column and the limiting groove is arranged on the rotating device, and the other is arranged on the valve body; or, one of the limiting column and the limiting groove is arranged on the rotating device, and the other is arranged on the valve seat.

[0029] The present application also provides a shock absorber, which comprises a first cylinder, a second cylinder, and a manual adjusting valve as described above, the valve body of the manual adjusting valve is arranged on the first cylinder, the valve seat of the manual adjusting valve is arranged on the second cylinder, and the first cylinder and the second cylinder are communicated through the flow passage of the manual adjusting valve.

[0030] The application sets the limiting structure to limit the moving distance of the valve core, so as to calibrate the moving distance of the valve core, compensate the starting point deviation of the regulating valve in the production and processing process, ensure that the moving distance of the valve core is consistent with the theoretical value, and improve the accuracy of the manual regulating valve in adjusting the oil flow. Meanwhile, the limiting structure avoids sealing failure or mechanical damage caused by excessive movement, enhances the reliability of the regulating valve, and prolongs the service life of the regulating valve. Moreover, the application reduces the processing precision requirement, reduces the dependence on high-precision processing equipment, and reduces the manufacturing cost. In addition, the limiting structure can be quickly adjusted during the assembly stage, reduce the rework rate, simplify the debugging process, and improve the assembly efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0031] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0032] Figure 1 The explosion schematic diagram of the manual regulating valve provided for the present embodiment Figure 1 ;

[0033] Figure 2 The structure schematic diagram of the manual regulating valve provided for the present embodiment Figure 1 ;

[0034] Figure 3 The sectional view schematic diagram of the line A-A in the present embodiment Figure 2 ;

[0035] Figure 4 The structure schematic diagram of the manual regulating valve provided for the present embodiment Figure 2 ;

[0036] Figure 5 The sectional view schematic diagram of the line B-B in the present embodiment Figure 4 ;

[0037] Figure 6 The structure schematic diagram of the shock absorber provided for the present embodiment

[0038] Figure 7 The local enlarged view of the area C in the present embodiment Figure 6 ;

[0039] Figure 8 The explosion schematic diagram of the manual regulating valve provided for the present embodiment Figure 2 ;

[0040] Figure 9 The structure schematic diagram of the manual regulating valve provided for the present embodimentFigure 3 ;

[0041] Figure 10 is a cross-sectional view along the line D-D in Figure 9 ;

[0042] Figure 11 is an exploded view of the manual regulating valve provided in the present embodiment Figure 3 ;

[0043] Figure 12 is a structural view of the manual regulating valve provided in the present embodiment Figure 4 ;

[0044] Figure 13 is a cross-sectional view along the line E-E in Figure 12 ;

[0045] Reference signs:

[0046] 1-valve seat; 2-valve body; 3-valve core; 4-rotating device; 5-limiting structure; 7-fastener; 8-first cylinder; 9-second cylinder; 11-first containing passage; 12-second containing passage; 13-third containing passage; 21-first valve body section; 22-second valve body section; 23-third valve body section; 24-oil passing passage; 25-seal; 41-groove; 43-identification part; 44-acting groove; 45-tail cover; 46-adjusting disc; 51-limiting column; 52-limiting groove; 61-positioning part; 62-positioning groove; 81-connection part; 451-rotating device end part; 452-rotating device side part; 521-stop surface; 611-elastic part; 612-clamping part; 811-first inner diameter passage; 812-second inner diameter passage. DETAILED DESCRIPTION

[0047] The technical solutions in the embodiments of the present application will be clearly and completely described in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0048] In the description of the present application, it should be noted that the orientations or positional relationships indicated by the terms “vertical”, “upper”, “lower”, “horizontal” and the like are the orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0049] In the description of the present application, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set", "install", "connect", "connect" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0050] The prior art manual regulating valve lacks objective regulating basis, resulting in errors between actual damping force and expected effect, and cannot accurately adapt to complex road conditions and personalized driving needs.

[0051] Therefore, the present embodiment provides a manual regulating valve, as shown in the accompanying drawings, the manual regulating valve comprises a valve seat 1, a valve body 2, a valve core 3 and a rotating device 4. Figures 1-13

[0052] The valve body 2 is arranged on the valve seat 1, and the valve body 2 has an oil passing channel 24 in communication with the outside, the valve core 3 is movably arranged in the oil passing channel 24, the rotating device 4 is rotatably arranged on the valve seat 1, and the rotating device 4 is connected with the valve core 3, and the rotating device 4 is used for rotating and driving the valve core 3 to move under the action of external force, so as to adjust the oil passing amount of the oil passing channel 24.

[0053] Among them, the rotating device 4 is provided with a limiting structure 5, the limiting structure 5 comprises a limiting column 51 and a limiting groove 52, the limiting column 51 is movably arranged in the limiting groove 52, and the limiting column 51 and the limiting groove 52 cooperate to limit the moving distance of the valve core 3.

[0054] Among them, one of the limiting column 51 and the limiting groove 52 is arranged on the rotating device 4, and the other is arranged on the valve body 2; or one of the limiting column 51 and the limiting groove 52 is arranged on the rotating device 4, and the other is arranged on the valve seat 1.

[0055] The present embodiment limits the moving distance of the valve core 3 by arranging the limiting structure 5, so as to calibrate the moving distance of the valve core 3, compensate for the starting point deviation of the regulating valve in the production and processing process, ensure that the moving distance of the valve core 3 is consistent with the theoretical value, and improve the accuracy of the manual regulating valve in adjusting the oil passing amount.

[0056] ​Meanwhile, the embodiment avoids sealing failure or mechanical damage caused by excessive movement through the setting of the limiting structure 5, enhances the reliability of the regulating valve, and prolongs the service life of the regulating valve. Moreover, the embodiment reduces the processing precision requirement, reduces the dependence on high-precision processing equipment, and reduces the manufacturing cost. In addition, the embodiment can be quickly adjusted during the assembly stage through the setting of the limiting structure 5, reduces the rework rate, simplifies the debugging process, and improves the assembly efficiency.

[0057] As shown in the drawings, Figure 1 In one embodiment, the rotating device 4 includes a tail cover 45 and an adjusting disc 46, the valve core 3 is connected with the tail cover 45 through the adjusting disc 46, one of the valve body 2 and the adjusting disc 46 is provided with a positioning piece 61, and the other is provided with a plurality of positioning grooves 62, and the positioning piece 61 is used to alternately enter the plurality of positioning grooves 62 during the rotation of the rotating device 4.

[0058] Specifically, each positioning groove 62 corresponds to a specific rotation angle of the rotating device 4, and further corresponds to a specific movement angle of the valve core 3 and a specific oil passing amount of the oil passing channel 24.

[0059] The embodiment locks the rotating device 4 and the valve core 3 at a specific position through the cooperation of the positioning piece 61 and the positioning groove 62, realizes the index positioning of the rotating device 4 and the valve core 3, and avoids the vibration of the rotating device 4 and the valve core 3 caused by vehicle shaking; and the embodiment realizes the index positioning through the cooperation of the positioning piece 61 and the positioning groove 62, the positioning piece 61 enters the positioning groove 62, enhances the operation confirmation feeling of the user, so that the user does not need to observe the scale at all times, and can complete the operation only by feeling, thereby reducing the risk of misoperation.

[0060] As shown in the drawings, Figure 1 In one embodiment, the positioning piece 61 includes an elastic piece 611 and a clamping piece 612, the elastic piece 611 is used to shrink under pressure when the clamping piece 612 leaves the positioning groove 62, and reset and push the clamping piece 612 to be clamped in the positioning groove 62 when the clamping piece 612 enters the positioning groove 62.

[0061] Specifically, the elastic piece 611 includes a spring.

[0062] The embodiment deforms the elastic piece 611 by extruding the elastic piece 611 to disperse the contact stress of the clamping piece 612 and the positioning groove 62, reduces the wear of the clamping piece 612 and the positioning groove 62, and prolongs the service life of the regulating valve.

[0063] As shown in the drawings, Figure 1 and Figure 5As shown in the figure, in one embodiment, the plurality of positioning grooves 62 are arranged in a ring array. This embodiment makes each positioning groove 62 correspond to a rotation angle (such as 30°, 45°, 60°, etc.) of the rotating device 4, and when the rotating device 4 rotates, the positioning member 61 enters different grooves in sequence, realizing multi-stage positioning.

[0064] As shown in the figure, in one embodiment, the positioning member 61 is spherical, and the inner surface of the positioning groove 62 is an arc surface. This embodiment reduces the friction between the positioning member 61 and the groove wall of the positioning groove 62. Figure 1

[0065] As shown in the figure, in one embodiment, the tail cover 45 includes a tail cover end portion 451 and a tail cover side portion 452 formed by extending outward from the outer periphery of the tail cover end portion 451, the tail cover end portion 451 is in contact with the valve body 2, and the tail cover side portion 452 is in contact with the valve seat 1. Figure 11

[0066] As shown in the figure, in one embodiment, one of the limiting column 51 and the limiting groove 52 is arranged at the end of the rotating device 4, and the other is arranged at the end of the valve body 2. Figures 1-5 In a specific embodiment, the limiting groove 52 is arranged at the inner end surface of the tail cover 45, and the limiting groove 52 is exposed to the periphery of the adjusting disc 46, the limiting column 51 is arranged at the end of the valve body 2 and close to the tail cover 45, and the limiting column 51 is located in the limiting groove 52.

[0067] As shown in the figure, in one embodiment, one of the limiting column 51 and the limiting groove 52 is arranged at the end of the rotating device 4, and the other is arranged at the end of the valve seat 1.

[0068] Figures 11-13 In a specific embodiment, the limiting groove 52 is arranged at the inner end surface of the tail cover 45, and the limiting groove 52 is exposed to the periphery of the adjusting disc 46, the limiting column 51 is arranged at the end of the valve seat 1 and close to the tail cover 45, and the limiting column 51 is located in the limiting groove 52.

[0069] As shown in the figure, in one embodiment, one of the limiting column 51 and the limiting groove 52 is arranged at the side of the rotating device 4, and the other is arranged at the side of the valve seat 1.

[0070] In a specific embodiment, the limiting groove 52 is arranged at the inner surface of the side wall of the tail cover 45, and the limiting groove 52 is exposed to the periphery of the adjusting disc 46, the limiting column 51 is arranged at the outer surface of the side wall of the valve seat 1 and close to the tail cover 45, and the limiting column 51 is located in the limiting groove 52. Figures 8-10

[0071] In a specific embodiment, the limiting groove 52 is arranged at the inner surface of the side wall of the tail cover 45, and the limiting groove 52 is exposed to the periphery of the adjusting disc 46, the limiting column 51 is arranged at the outer surface of the side wall of the valve seat 1 and close to the tail cover 45, and the limiting column 51 is located in the limiting groove 52.

[0072] ​​​​This embodiment illustrates three different installation positions of the limiting structure 5, which can be applied to manual regulating valves of different structures and sizes, and has a wide range of applications.

[0073] like Figure 1 , Figures 3-5 , Figures 8-13 As shown, in one embodiment, the limiting groove 52 is provided with stop surfaces 521 at both ends, which are used to stop the limiting post 51. In this embodiment, the movement of the limiting post 51 is restricted by the stop surfaces 521, thereby limiting the movement distance of the valve core 3, calibrating the movement distance of the valve core 3, ensuring that the movement distance of the valve core 3 is consistent with the theoretical value, and improving the accuracy of the manual regulating valve in adjusting the oil flow rate.

[0074] like Figure 3 As shown, in one embodiment, the valve seat 1 forms a first receiving channel 11, a second receiving channel 12, and a third receiving channel 13 with successively increasing inner diameters. The valve body 2 has a second valve body section 22 and a third valve body section 23 with successively increasing outer diameters. The second valve body section 22 is fitted with a sealing element 25, and the sealing element 25 contacts the third valve body section 23. The second valve body section 22 is located in the first receiving channel 11, the sealing element 25 is located in the second receiving channel 12, and the third valve body section 23 is located in the third receiving channel 13.

[0075] In this embodiment, a valve seat 1 with a stepped inner wall and a valve body 2 with a stepped outer wall are provided to guide the installation of the valve body 2 and the valve seat 1, reducing the assembly difficulty between the valve body 2 and the valve seat 1. Through the cooperation of the sealing element 25 and the second receiving channel 12, the sealing between the end face of the third valve body section 23 and the second receiving channel 12 is achieved, as well as the sealing between the side of the second valve body section 22 and the first receiving channel 11, thus improving the sealing performance.

[0076] Specifically, the seal 25 is annular.

[0077] like Figure 3 As shown, in one embodiment, the rotating device 4 and the valve core 3 are connected by a fastener 7. The rotating device 4 is provided with a groove 41, and the bottom of the groove 41 is provided with a through hole (not shown in the figure) that passes through the rotating device 4. The fastener 7 passes through the through hole and is connected to the valve core 3. The groove 41 is used to accommodate a cover to cover the fastener 7.

[0078] In this embodiment, the groove 41 provides a space for the cover to be accommodated, which helps the cover to cover the fastener 7 and at the same time prevents the cover from protruding from the surface of the rotating device 4, thus improving the aesthetics.

[0079] like Figure 2As shown, in one embodiment, the rotating device 4 is provided with a marking section 43 for indicating the amount of oil passing through the oil passage 24. This embodiment, by providing the marking section 43, increases the visibility of the control valve, enhancing the sense of operational confirmation and improving the user experience.

[0080] like Figure 2 As shown, in one embodiment, the rotating device 4 is provided with a plurality of operating grooves 44, which are arranged circumferentially along the rotating device 4. The provision of multiple operating grooves 44 in this embodiment facilitates the user's rotation of the rotating device 4, thus improving the user experience.

[0081] like Figure 6 As shown, this embodiment also provides a shock absorber, including a first cylinder 8, a second cylinder 9, and a manual adjustment valve as described in any of the embodiments above. The valve body 2 of the manual adjustment valve is disposed on the first cylinder 8, and the valve seat 1 of the manual adjustment valve is disposed on the second cylinder 9. The first cylinder 8 and the second cylinder 9 are connected through the flow passage of the manual adjustment valve.

[0082] This embodiment limits the movement distance of the valve core 3 by setting a limiting structure 5, compensating for the starting point deviation that occurs during the production and processing of the regulating valve, ensuring that the movement distance of the valve core 3 is consistent with the theoretical value, and improving the accuracy of the manual regulating valve in adjusting the oil flow rate. Simultaneously, this embodiment avoids sealing failure or mechanical damage caused by excessive movement by setting the limiting structure 5, enhancing the reliability of the regulating valve and extending its service life. Furthermore, this embodiment reduces the processing precision requirements, decreases reliance on high-precision processing equipment, and lowers manufacturing costs. Additionally, this embodiment enables rapid adjustments during the assembly stage by setting the limiting structure 5, reducing rework rates, simplifying the debugging process, and improving assembly efficiency.

[0083] like Figure 7 As shown, in one embodiment, the first cylinder 8 is provided with a connecting part 81, the connecting part 81 having a first inner diameter channel 811 and a second inner diameter channel 812 with the inner diameter increasing sequentially, the valve body 2 having a first valve body section 21 and a second valve body section 22 with the outer diameter increasing sequentially, the first valve body section 21 being located in the first inner diameter channel 811, and the second valve body section 22 being located in the second inner diameter channel 812.

[0084] In this embodiment, a connecting part 81 with a stepped inner wall and a valve body 2 with a stepped outer wall are provided to guide the valve body 2 when it is installed on the connecting part 81, thereby reducing the assembly difficulty between the valve body 2 and the connecting part 81.

[0085] Specifically, a sealing ring is also fitted on the first valve body section 21, and the sealing ring is close to the second valve body section 22.

[0086] Note that the above description is merely a preferred embodiment and the technical principles employed in this application. Those skilled in the art will understand that this application is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the scope of protection of this application. Therefore, although this application has been described in detail through the above embodiments, this application is not limited to the above embodiments. Many other equivalent embodiments may be included without departing from the concept of this application, and the scope of this application is determined by the scope of the appended claims.

[0087] The above description is only a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A manually adjustable valve, characterized in that, Includes valve seat, valve body, valve core, and rotating mechanism; The valve body is disposed on the valve seat and has an oil passage communicating with the outside. The valve core is movably disposed in the oil passage. The rotating device is rotatably disposed on the valve seat and connected to the valve core. The rotating device is used to rotate under the action of external force and drive the valve core to move, so as to adjust the oil passage volume of the oil passage. The rotating device is equipped with a limiting structure, which includes a limiting post and a limiting groove. The limiting post is movably disposed in the limiting groove, and the limiting post and the limiting groove cooperate to limit the movement distance of the valve core. Wherein, one of the limiting post and the limiting groove is disposed on the rotating device and the other is disposed on the valve body; or, one of the limiting post and the limiting groove is disposed on the rotating device and the other is disposed on the valve seat.

2. The manual regulating valve according to claim 1, characterized in that, One of the limiting post and the limiting groove is disposed at the end of the rotating device and the other is disposed at the end of the valve body; Alternatively, one of the limiting post and the limiting groove may be disposed at the end of the rotating device and the other at the end of the valve seat; Alternatively, one of the limiting post and the limiting groove may be disposed on the side of the rotating device and the other on the side of the valve seat.

3. The manual regulating valve according to claim 2, characterized in that, The rotating device includes a tail cover and an adjusting plate. The valve core passes through the adjusting plate and is connected to the tail cover. The limiting groove is disposed on the inner end face of the tail cover and is exposed on the periphery of the adjusting plate. The limiting post is disposed at the end of the valve body and close to the tail cover, and the limiting post is located in the limiting groove.

4. The manual regulating valve according to claim 2, characterized in that, The rotating device includes a tail cover and an adjusting plate. The valve core passes through the adjusting plate and is connected to the tail cover. The limiting groove is disposed on the inner end face of the tail cover and is exposed on the periphery of the adjusting plate. The limiting post is disposed at the end of the valve seat and close to the tail cover, and the limiting post is located in the limiting groove.

5. The manual regulating valve according to claim 2, characterized in that, The rotating device includes a tail cover and an adjusting plate. The valve core passes through the adjusting plate and is connected to the tail cover. The limiting groove is disposed on the inner surface of the side wall of the tail cover and is exposed on the periphery of the adjusting plate. The limiting post is disposed on the outer surface of the side wall of the valve seat and is close to the tail cover. The limiting post is located in the limiting groove.

6. The manual regulating valve according to claim 1, characterized in that, The limiting groove is provided with stop surfaces at both ends, and the stop surfaces are used to stop the limiting post.

7. The manual regulating valve according to claim 1, characterized in that, One of the valve body and the rotating device is provided with a positioning element, and the other is provided with multiple positioning slots. The positioning element is used to alternately enter the multiple positioning slots during the rotation of the rotating device.

8. The manual regulating valve according to claim 7, characterized in that, The positioning element includes an elastic element and a snap-fit ​​element. The elastic element is used to contract under pressure when the snap-fit ​​element leaves the positioning groove, and to reset and push the snap-fit ​​element to lock into the positioning groove when the snap-fit ​​element enters the positioning groove.

9. The manual regulating valve according to claim 1, characterized in that, The valve seat forms a first receiving channel, a second receiving channel, and a third receiving channel with successively increasing inner diameters; the valve body has a second valve body section and a third valve body section with successively increasing outer diameters, the second valve body section is fitted with a sealing element, and the sealing element contacts the third valve body section; the second valve body section is located in the first receiving channel, the sealing element is located in the second receiving channel, and the third valve body section is located in the third receiving channel; And / or, the rotating device is connected to the valve core by a fastener, the rotating device is provided with a groove, the bottom of the groove is provided with a through hole penetrating the rotating device, the fastener passes through the through hole and is connected to the valve core, and the groove is used to accommodate a cover to cover the fastener; And / or, the rotating device is provided with an indicator to indicate the amount of oil passing through the oil passage; And / or, the rotating device is provided with a plurality of working grooves, which are arranged circumferentially along the rotating device.

10. A shock absorber, characterized in that, The device includes a first cylinder, a second cylinder, and a manual regulating valve as described in any one of claims 1-9, wherein the valve body of the manual regulating valve is disposed on the first cylinder, the valve seat of the manual regulating valve is disposed on the second cylinder, and the first cylinder and the second cylinder are connected through the flow passage of the manual regulating valve.

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