Damping control valve for shock absorber

Abstract

The invention discloses a damping control valve for a shock absorber, and relates to the technical field of control valves. Comprising a valve shell provided with an action cavity and a control cavity; the action element is arranged in the action cavity and divides the action cavity into a first cavity and a second cavity, the first cavity directly faces the control cavity, and the second cavity is far away from the control cavity; the pivot is a hollow part, is in transmission connection with the action element and is communicated with the second cavity and the control cavity; the control element is arranged in the control cavity, is in transmission connection with the pivot and can move in the axial direction of the pivot to adjust the medium circulation amount of the damping control valve; the conveying valve is arranged on the pivot and is linked with the pivot; when the pivot moves towards the control element, the conveying valve conducts the first cavity and the second cavity, and when the pivot moves in the direction away from the control element, the conveying valve can apply damping to media flowing into the first cavity through the pivot or cut off connection between the first cavity and the second cavity. According to the invention, gas accumulated in the action cavity can be discharged through the control cavity.

Description

Technical Field

[0001] The invention relates to the technical field of damping control valves, and in particular to a damping control valve for a shock absorber. Background Art

[0002] The automobile shock absorber is installed between the frame and the axle. It is mainly used to suppress the shock when the spring rebounds after absorbing the shock and the impact from the road surface, so that the vehicle can quickly return to the normal driving state, and play a role in shock resistance and shock absorption. The automobile shock absorber is equipped with a damping valve. When the car is affected by different road conditions and vehicle speeds, when the vibration is transmitted through the wheel, more than 90% of the energy is damped by the shock absorber. It is a key component for shock resistance and shock absorption in the automobile suspension system.

[0003] The existing damping control valve includes a valve housing, an action component and a damping control element. The valve housing is provided with an action chamber for installing the action component and a control chamber for installing the damping control element. The relative position of the control element in the control chamber is controlled by the movement control component of the action component to control the medium flow of the damping control valve and thus control the damping of the shock absorber. The action component divides the action chamber into a first chamber and a second chamber, the inflow chamber is close to the control chamber, and the second chamber is far from the control chamber. During installation, there may be a certain amount of gas in both the first chamber and the second chamber, and the damping medium can also enter the first chamber and the second chamber when the damping control valve is working.

[0004] The inventors have found that when the shock absorber pressure is high, the gas and other pressure media are dissolved in the damping medium, which will not affect the stability of the damping control valve. However, when the pressure in the shock absorber decreases and / or the temperature drops, the gas and other pressure media precipitate from the damping medium and appear as bubbles in the working chamber of the shock absorber or in the action chamber of the damping control valve in the form of accumulation. When the second chamber of the damping control valve is higher than the first chamber, the gas accumulates at a high place under the action of gravity. Due to the difference in medium density, it will affect the movement of the action parts, thereby affecting the stability of the action parts. That is, the existing damping control valve has poor action stability or needs to be implemented in a more complicated way. Summary of the invention

[0005] In response to the technical problem that the existing damping control valve has poor operating stability, the present invention provides a damping control valve for a shock absorber, which can discharge the gas accumulated in the first chamber and the second chamber of the damping control valve through the control chamber to avoid gas accumulation in the operating chamber of the damping control valve and affecting the stability of the operating parts, thereby effectively improving the performance of the shock absorber assembly, enhancing the stability of the damping value control, and improving the reliability and stability of the product.

[0006] The present invention is achieved through the following technical solutions:

[0007] The present invention provides a damping control valve for a shock absorber, comprising: a valve housing, provided with an action chamber and a control chamber; an action element, arranged in the action chamber and dividing the action chamber into a first chamber and a second chamber, wherein the first chamber is opposite to the control chamber and the second chamber is away from the control chamber; a pivot, which is a hollow rod-shaped part, is transmission-connected with the action element, one end of which is located in the second chamber and the other end of which is located in the control chamber to connect the second chamber and the control chamber; a control element, which is arranged in the control chamber, is transmission-connected with the pivot, and can move along the axial direction of the pivot under the drive of the pivot to adjust the medium flow rate of the damping control valve; a delivery valve, which is arranged on the pivot and is linked with the pivot; wherein, when the pivot moves toward the control element, the delivery valve conducts the connection between the first chamber and the second chamber, and when the pivot moves in a direction away from the control element, the delivery valve can apply damping to the medium flowing from the pivot into the first chamber or cut off the connection between the first chamber and the second chamber.

[0008] In view of this, the damping control valve for shock absorber provided by the present invention includes a valve housing, an action element, a pivot, a control element and a delivery valve, wherein the action element divides the action chamber into a first chamber and a second chamber, the pivot is connected to the action element by transmission and connects the second chamber and the control chamber, so that the second chamber is directly connected to the control chamber, and the accumulated gas in the second chamber can be discharged from the control chamber, the control element is connected to the pivot by transmission, and can move along the axial direction of the pivot under the drive of the pivot to adjust the medium flow rate of the damping control valve, so that the damping control valve can adjust the flow damping of the medium. At the same time, the delivery valve is arranged on the pivot, linked with the pivot, and when the pivot moves to the control element, the delivery valve conducts the connection between the first chamber and the second chamber, so that when the action element adjusts the medium flow rate, the medium in the first chamber can flow into the second chamber and the control chamber, so that the gas accumulated in the first chamber is pumped out, thereby avoiding the gas accumulation in the action chamber of the damping control valve affecting the stability of the action component, thereby effectively improving the performance of the shock absorber assembly, improving the stability of the damping value control, and improving the reliability and stability of the product.

[0009] In addition, when the pivot moves in a direction away from the control element, the delivery valve can apply damping to the medium flowing from the pivot into the first chamber to prevent most of the medium in the second chamber from flowing back into the first chamber, or cut off the connection between the first chamber and the second chamber to prevent most of the medium in the second chamber from flowing back into the first chamber.

[0010] Among them, the delivery valve is arranged on the pivot and is linked with the pivot. When the pivot moves to the control element, the delivery valve opens the connection between the first chamber and the second chamber, so that the gas accumulated in the first chamber is pumped out. Compared with increasing the oil leakage and sealing problems of the components, complex structure and high cost by machining a difficult-to-machine flow channel on the valve housing, this can effectively solve the problem of trapped air in the regulating valve while simplifying the gas flow path, reducing the sealing leakage path, simplifying the parts structure and reducing product costs.

[0011] In summary, the damping control valve for the shock absorber provided by the present invention can discharge the gas accumulated in the first chamber and the second chamber of the damping control valve through the control chamber, so as to avoid the gas accumulation in the action chamber of the damping control valve affecting the stability of the action parts, thereby effectively improving the performance of the shock absorber assembly, improving the stability of the damping value control, improving the reliability and stability of the product, and having the characteristics of good sealing, simple structure and low cost.

[0012] In an optional embodiment of the present application, the valve housing includes a first shell and a second shell that are connected, the action chamber is the inner chamber of the first shell, and the control chamber is the inner chamber of the second shell. The first shell and the second shell form a split valve housing, which is convenient for installing the action element in the action chamber and the control element in the control chamber respectively.

[0013] In an optional embodiment of the present application, a first connecting hole is provided at one end of the pivot located in the control cavity, and the first connecting hole is used to connect the control cavity and the inner cavity of the pivot to ensure that the control cavity and the second cavity can be connected through the pivot.

[0014] In an optional embodiment of the present application, a force transmission element is provided at one end of the pivot located in the control cavity, and the force transmission element abuts against the control element to ensure that the end of the pivot can stably abut against the control element.

[0015] In an optional embodiment of the present application, a second connecting hole is provided in the middle of the pivot, and the second connecting hole is used to connect the first cavity and the inner cavity of the pivot to ensure that when the delivery valve is opened, the pivot can connect the first cavity with the second cavity and the control cavity.

[0016] In an optional embodiment of the present application, the delivery valve includes: a valve seat, fixedly connected to the pivot; a valve core, slidably connected to the pivot and capable of moving axially along the pivot; a first elastic element, the first elastic element acting between the valve seat and the valve core; wherein, under the action of the medium pressure in the first cavity, the valve core can be driven to move toward the valve seat to conduct the connection between the first cavity and the second cavity, so as to ensure that when the pivot moves toward the control element, the delivery valve can conduct the connection between the first cavity and the second cavity, and when the pivot moves in a direction away from the control element, the delivery valve can damp the medium flowing into the first cavity from the pivot or cut off the connection between the first cavity and the second cavity.

[0017] In an optional embodiment of the present application, the valve seat, the valve core and the first elastic element are all arranged in the pivot, and the valve seat and the middle of the valve core are provided with a medium flow channel to facilitate the installation of the delivery valve, while ensuring that the installation of the delivery valve does not affect the volume of the valve housing, thereby simplifying the damping control valve structure and reducing costs.

[0018] In an optional embodiment of the present application, one end of the valve core away from the valve seat is in the shape of a stepped shaft to ensure that when the pivot moves to the control element, the medium in the first chamber can push the valve core to move away from the control chamber, so as to release the valve core from blocking the second connection, thereby allowing the connection between the first chamber and the second chamber to be conducted.

[0019] In an optional embodiment of the present application, an end cover is further included, and the end cover is arranged at an end of the control cavity away from the first cavity to facilitate the installation of the control element in the control cavity.

[0020] In an optional embodiment of the present application, a second elastic element is further included, and the second elastic element acts between the action element and an end of the first cavity away from the second cavity, so as to provide a driving force for resetting the action element through the second elastic element.

[0021] That is to say, the present invention provides a damping control valve for a shock absorber, comprising:

[0022] A driving element drives the action element to move;

[0023] An action component is arranged in the valve housing to form a first cavity and a second cavity;

[0024] The action part is provided with a pivot and moves with the action element;

[0025] a delivery valve, disposed on the pivot;

[0026] As the actuating element moves, the first chamber is compressed, and the flow of the medium between the first chamber and the second chamber is not hindered by the delivery valve. Otherwise, the delivery valve hinders the flow of the medium between the first chamber and the second chamber.

[0027] The delivery valve is configured as a check valve between the first cavity and the second cavity, and can move relative to the pivot to open and close the medium passage between the first cavity and the second cavity.

[0028] The delivery valve is opened and closed axially or radially relative to the pivot.

[0029] The side of the delivery valve in contact with the first chamber has at least one surface on which pressure is applied by the damping medium.

[0030] Wherein, the pivot is provided with a flow opening, and the flow opening is used to connect the first cavity and the inner cavity of the pivot.

[0031] There is a reciprocating channel in the inner cavity of the pivot, and the reciprocating flow of the medium between the first cavity and the second cavity uses the reciprocating channel of the pivot.

[0032] Wherein, the delivery valve comprises:

[0033] a valve seat, fixedly connected to the pivot;

[0034] A valve core is slidably connected to the pivot and is movable along the axial direction of the pivot;

[0035] a first elastic element, the first elastic element being interposed between the valve seat and the valve core;

[0036] Under the action of the medium pressure in the first cavity, the valve core can be driven to move toward the valve seat to connect the first cavity and the second cavity.

[0037] The valve seat, the valve core and the first elastic element are all arranged in the pivot, and a medium flow channel is arranged in the middle of the valve seat and the valve core.

[0038] Wherein, the delivery valve is a single component, which realizes the opening and resetting of the valve.

[0039] It also includes a control component, which includes a control element. The control component can transmit the action of the driving element to adjust the damping force.

[0040] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0041] 1. The damping control valve for a shock absorber provided by the present invention comprises a valve housing, an operating element, a pivot, a control element and a delivery valve, wherein the operating element divides an operating chamber into a first chamber and a second chamber, the pivot is transmission-connected to the operating element and connects the second chamber and the control chamber, so that the second chamber is directly connected to the control chamber, and the accumulated gas in the second chamber can be discharged from the control chamber, the control element is transmission-connected to the pivot, and can move along the axial direction of the pivot driven by the pivot to adjust the medium flow rate of the damping control valve, so that the damping control valve can adjust the flow damping of the medium, and at the same time, the delivery valve is arranged on the pivot, linked with the pivot, and when the pivot moves to the control element, the delivery valve conducts the connection between the first chamber and the second chamber, so that when the operating element reduces the medium flow rate, the medium in the first chamber can flow into the second chamber and the control chamber, so that the gas accumulated in the first chamber is pumped out, thereby avoiding the gas accumulation in the operating chamber of the damping control valve affecting the stability of the operating components, thereby effectively improving the performance of the shock absorber assembly, improving the stability of the damping value control, and improving the reliability and stability of the product.

[0042] 2. In the damping control valve for shock absorbers provided by the present invention, the delivery valve is arranged on the pivot and linked with the pivot. When the pivot moves to the control element, the delivery valve opens the connection between the first chamber and the second chamber, so that the gas accumulated in the first chamber is pumped out. Compared with the problem of oil leakage and sealing of the element, complex structure and high cost caused by machining a difficult-to-machine flow channel on the valve housing, this invention can effectively solve the problem of trapped air in the regulating valve while simplifying the gas flow path, reducing the sealing leakage path, simplifying the parts structure and reducing the product cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0044] In the attached picture:

[0045] Figure 1 A schematic structural diagram of a damping control valve for a shock absorber in a standby state provided by an embodiment of the present invention;

[0046] Figure 2 For the present invention Figure 1 A schematic diagram of the enlarged structure of part A;

[0047] Figure 3 A schematic diagram of the structure of a damping control valve for a shock absorber provided by an embodiment of the present invention in a working state;

[0048] Figure 4 For the present invention Figure 3 Schematic diagram of the enlarged structure of part B.

[0049] Marks and corresponding parts names in the attached drawings:

[0050] 10-valve housing, 11-first housing, 12-second housing, 13-acting chamber, 13a-first chamber, 13b-second chamber, 14-control chamber, 20-acting element, 30-pivot, 31-first connecting hole, 32-force transmission element, 33-second connecting hole, 34-limiting step, 35-reciprocating channel, 40-control element, 50-delivery valve, 51-valve seat, 52-valve core, 53-first elastic element, 60-end cover, 70-second elastic element, 80-driving element, 90-control assembly. DETAILED DESCRIPTION

[0051] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0052] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for which protection is sought, but merely represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0053] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0054] In the description of the present application, it should be noted that the terms "upper", "lower", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the product of the application is usually placed when in use. They are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0055] It should be noted that, in the absence of conflict, different features in the embodiments of the present application may be combined with each other.

[0056] The existing damping control valve includes a valve housing, an action component and a damping control element. The valve housing is provided with an action chamber for installing the action component and a control chamber for installing the damping control element. The relative position of the control element in the control chamber is controlled by the movement control component of the action component to control the medium flow of the damping control valve and thus control the damping of the shock absorber. The inventor has found through research that when the shock absorber pressure is high, the gas and other pressure media are dissolved in the damping medium, which will not affect the stability of the damping control valve action. However, when the pressure in the shock absorber decreases and / or the temperature drops, the gas and other pressure media precipitate from the damping medium and appear as bubbles in the working chamber of the shock absorber or in the action chamber of the damping control valve in the form of accumulation. When the second chamber of the damping control valve is higher than the first chamber, the gas accumulates at a high place under the action of gravity. Due to the difference in medium density, the movement of the action component will be affected, thereby affecting the stability of the action component, that is, the existing damping control valve has poor action stability.

[0057] In order to solve the above-mentioned problems, the inventor innovatively designed the following technical solution, and the specific implementation scheme of the present application will be described in detail below in conjunction with the accompanying drawings. It should be noted that the defects existing in the above-mentioned solutions in the prior art are the results obtained by the inventor after practice and careful research. Therefore, the discovery process of the above-mentioned technical problems and the solutions proposed in the following embodiments for the above-mentioned problems should all be the contributions made by the inventor to the present application in the process of invention and creation, and should not be understood as the technical content known to those skilled in the art.

[0058] Example

[0059] Combination Figure 1-Figure 4 , this embodiment provides a damping control valve for a shock absorber, comprising:

[0060] A driving element 80 drives the action element 20 to move;

[0061] The action member 20 is disposed in the valve housing 10 to form a first chamber 13a and a second chamber 13b;

[0062] The action member 20 is provided with a pivot 30 which moves with the action member 20;

[0063] a delivery valve 50 , disposed on the pivot 30 ;

[0064] As the actuating element 20 moves, the first chamber 13a is compressed, and the flow of the medium between the first chamber 13a and the second chamber 13b is not hindered by the delivery valve 50. Otherwise, the delivery valve 50 hinders the flow of the medium between the first chamber and the second chamber.

[0065] The delivery valve 50 is configured as a check valve between the first chamber 13a and the second chamber 13b, and can move relative to the pivot 30 to open and close the medium passage between the first chamber 13a and the second chamber 13b.

[0066] The delivery valve 50 is opened and closed in an axial or radial manner relative to the pivot shaft 30 .

[0067] The side of the delivery valve 50 that contacts the actuating chamber 13 has at least one surface to which pressure is applied by the damping medium.

[0068] The pivot 30 is provided with a flow opening 33 , and the flow opening 33 is used to connect the first cavity 13 a and the inner cavity of the pivot 30 .

[0069] The inner cavity of the pivot 30 has a reciprocating channel 35 , and the reciprocating flow of the medium between the first cavity 13 a and the second cavity 13 b uses the reciprocating channel 35 of the pivot 6 .

[0070] As a specific embodiment of the delivery valve 50, the delivery valve 50 includes:

[0071] The valve seat 51 is fixedly connected to the pivot 30;

[0072] The valve core 52 is slidably connected to the pivot shaft 30 and can move along the axial direction of the pivot shaft 30;

[0073] A first elastic element 53, which is interposed between the valve seat 51 and the valve core 52;

[0074] Under the action of the medium pressure in the actuating chamber 13 , the valve core 52 can be driven to move toward the valve seat 51 to connect the actuating chamber 13 and the control chamber 14 .

[0075] The valve seat 51 , the valve core 52 and the first elastic element 53 are all disposed in the pivot 30 , and a medium flow channel is disposed in the middle of the valve seat 51 and the valve core 52 .

[0076] As a specific implementation of the delivery valve 50, the delivery valve 50 is a single component that realizes the opening and resetting of the valve.

[0077] The control assembly 90 is also included. The control assembly includes the control element 40. The control assembly 90 can transmit the action of the driving element 80 to adjust the damping force.

[0078] One embodiment comprises: a valve housing 10, which is provided with an action chamber 13 and a control chamber 14; an action element 20, which is arranged in the action chamber 13 and divides the action chamber 13 into a first chamber 13a and a second chamber 13b, wherein the first chamber 13a is directly opposite to the control chamber 14, and the second chamber 13b is far away from the control chamber 14; a pivot 30, which is a hollow rod-shaped part, is connected to the action element 20 in a transmission manner, one end of which is located in the second chamber 13b, and the other end of which is located in the control chamber 14, so as to connect the second chamber 13b with the control chamber 14; a control element 40, which is arranged in the control chamber 14 and is connected to the pivot 30 in a transmission manner. The delivery valve 50 is dynamically connected and can move along the axial direction of the pivot 30 driven by the pivot 30 to adjust the medium flow rate of the damping control valve; the delivery valve 50 is arranged on the pivot 30 and is linked with the pivot 30; wherein, when the pivot 30 moves toward the control element 40, the delivery valve 50 conducts the connection between the first chamber 13a and the second chamber 13b, and when the pivot 30 moves in a direction away from the control element 40, the delivery valve 50 can apply damping to the medium flowing into the first chamber 13a from the pivot 30 or cut off the connection between the first chamber 13a and the second chamber 13b.

[0079] It can be understood that the valve housing 10 includes a first housing 11 and a second housing 12 that are connected, the action chamber 13 is the inner chamber of the first housing 11, and the control chamber 14 is the inner chamber of the second housing 12. The first housing 11 and the second housing 12 form a split valve housing 10, which makes it convenient to install the action element 20 in the action chamber 13 and the control element 40 in the control chamber 14 respectively.

[0080] In this embodiment, the pivot 30 is provided with a first connecting hole 31 at one end of the control cavity 14, and the first connecting hole 31 is used to connect the control cavity 14 and the inner cavity of the pivot 30 to ensure that the control cavity 14 and the second cavity 13b can be connected through the pivot 30.

[0081] Generally speaking, a force transmission element 32 is provided at one end of the pivot 30 located in the control cavity 14 , and the force transmission element 32 abuts against the control element 40 to ensure that the end of the pivot 30 can stably abut against the control element 40 .

[0082] Correspondingly, a second connecting hole 33 is provided in the middle of the pivot 30, and the second connecting hole 33 is used to connect the first cavity 13a and the inner cavity of the pivot 30 to ensure that when the delivery valve 50 is opened, the pivot 30 can connect the first cavity 13a with the second cavity 13b and the control cavity 14.

[0083] Combination Figure 2 and Figure 4 The delivery valve 50 includes: a valve seat 51, which is fixedly connected to the pivot 30; a valve core 52, which is slidably connected to the pivot 30 and can move along the axial direction of the pivot 30; a first elastic element 53, the first elastic element 53 is between the valve seat 51 and the valve core 52; wherein, under the action of the medium pressure in the first chamber 13a, the valve core 52 can be driven to move toward the valve seat 51 to conduct the connection between the first chamber 13a and the second chamber 13b, so as to ensure that when the pivot 30 moves toward the control element 40, the delivery valve 50 can conduct the connection between the first chamber 13a and the second chamber 13b, and when the pivot 30 moves in a direction away from the control element 40, the delivery valve 50 can damp the medium flowing from the pivot 30 into the first chamber 13a or cut off the connection between the first chamber 13a and the second chamber 13b.

[0084] Specifically, the valve seat 51, the valve core 52 and the first elastic element 53 are all arranged in the pivot 30, and the valve seat 51 and the valve core 52 are provided with a medium flow channel in the middle to facilitate the installation of the delivery valve 50, while ensuring that the installation of the delivery valve 50 does not affect the volume of the valve housing 10, thereby simplifying the damping control valve structure and reducing costs.

[0085] Therefore, it is understood that, under the cooperation of the valve core 52 and the pivot 30, the first chamber 13a and the inner chamber of the pivot 30 can be connected and disconnected, or the size of the effective cross-sectional area of ​​the connecting channel between the first chamber 13a and the inner chamber of the pivot 30 can be controlled. Specifically, a limiting step 34 is provided inside the pivot 30, and the limiting step 34 is located below the second connecting hole 33. When the action element 20 is on standby, the end face of the valve core 52 is abutted against the limiting step 34 by the elastic force of the first elastic element 53. Thus, when the end face of the valve core 52 is completely sealed with the limiting step 34, the connection between the first chamber 13a and the second chamber 13b can be cut off; and when the end face of the valve core 52 is not tightly sealed with the limiting step 34, or there is a concave notch on the end face of one of the components, a large damping can be applied to the medium flowing from the pivot 30 into the first chamber 13a, so as to prevent most of the medium in the second chamber 13b from flowing back to the first chamber 13a.

[0086] It should be understood that the end of the valve core 52 away from the valve seat 51 is in the shape of a stepped shaft to ensure that when the pivot 30 moves toward the control element 40, the medium in the first chamber 13a can push the valve core 52 to move away from the control chamber 14, so as to release the valve core 52 from blocking the second connection, thereby allowing the connection between the first chamber 13a and the second chamber 13b to be conducted.

[0087] It can be understood that the present embodiment further includes an end cap 60, which is provided at one end of the control chamber 14 away from the first chamber 13a, so as to facilitate the installation of the control element 40 in the control chamber 14. Of course, the present embodiment further includes a second elastic element 70, which acts between the action element 20 and one end of the first chamber 13a away from the second chamber 13b, so as to provide a driving force for the reset of the action element 20 through the second elastic element 70. At the same time, a driving element 80 is also provided, so as to drive the action element 20 to move through the driving element 80.

[0088] As for the other parts such as the action element 20 and the end cover 60, they are the conventional necessary elements of the damping control valve. Their specific structures are existing settings and are not the core invention points of this application. This application will not provide a detailed description of them, and their structures should not be used to limit the scope of protection of this patent.

[0089] In summary, the damping control valve for the shock absorber provided in the present embodiment includes a valve housing 10, an actuating element 20, a pivot 30, a control element 40, a delivery valve 50, an end cover 60 and a second elastic element 70. The actuating element 20 separates the actuating chamber 13 into a first chamber 13a and a second chamber 13b. The pivot 30 is transmission-connected to the actuating element 20 and connects the second chamber 13b and the control chamber 14, so that the second chamber 13b is directly connected to the control chamber 14 and the accumulated gas in the second chamber 13b can be discharged from the control chamber 14. The control element 40 is transmission-connected to the pivot 30 and can move along the axial direction of the pivot 30 under the drive of the pivot 30 to adjust the medium flow rate of the damping control valve, so that the damping control valve can adjust the flow damping of the medium.

[0090] Meanwhile, in the standby state, the driving element 80 does not apply driving force to the actuating element 20. At this time, the actuating element 20 and the pivot 30 maintain the initial position. Under the action of the first elastic element 53, the end of the valve core 52 abuts against the limit step 34. The delivery valve 50 can damp the medium flowing from the pivot 30 into the first chamber 13a or cut off the connection between the first chamber 13a and the second chamber 13b. Figure 3 and Figure 4 When the pivot 30 moves toward the control element 40, the operating element 20 moves toward the control element 40 to compress the volume of the first chamber 13a, so that the medium pressure in the first chamber 13a increases, so as to push the valve core 52 to compress the first elastic element 53, thereby connecting the first chamber 13a and the second chamber 13b. Therefore, when the operating element 20 reduces the medium flow rate, the medium in the first chamber 13a flows into the second chamber 13b and the control chamber 14 to pump out the gas accumulated in the first chamber 13a.

[0091] Recombination Figure 1 and Figure 2When the second elastic element 70 drives the action element 20 to reset or the driving element 80 drives the action element 20 to reset, the pivot 30 moves in the direction away from the control element 40. At this time, the action element 20 compresses the volume of the second chamber 13b, and under the action of the reset elastic force of the first elastic element 53, the driving valve core 52 is reset to contact the limit step 34, thereby applying damping to the medium flowing from the pivot 30 into the first chamber 13a to prevent most of the medium in the second chamber 13b from flowing back to the first chamber 13a, or cutting off the connection between the first chamber 13a and the second chamber 13b to prevent most of the medium in the second chamber 13b from flowing back to the first chamber 13a.

[0092] The valve seat 51, valve core 52 and first elastic element 53 of the delivery valve 50 are all arranged in the pivot 30, so that when the pivot 30 moves toward the control element 40, the delivery valve 50 conducts the connection between the first chamber 13a and the second chamber 13b, so that the gas accumulated in the first chamber 13a is pumped out, and the action element 20 is integrated with the pump action element 20. Compared with the problem of oil leakage and sealing of components, complex structure and high cost caused by machining a difficult-to-machine flow channel on the valve housing 10, the gas flow path can be simplified, the sealing leakage path can be reduced, the part structure can be simplified and the product cost can be reduced while effectively solving the problem of trapped gas in the regulating valve.

[0093] In summary, the damping control valve for the shock absorber provided in this embodiment can discharge the gas accumulated in the first chamber 13a and the second chamber 13b of the damping control valve through the control chamber 14, so as to avoid the gas accumulation in the action chamber 13 of the damping control valve and affect the stability of the action parts, thereby effectively improving the performance of the shock absorber assembly, enhancing the stability of the damping value control, improving the reliability and stability of the product, and having the characteristics of good sealing, simple structure and low cost.

[0094] The specific implementation methods described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific implementation method of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A damping control valve for a shock absorber, characterized in that: include: A driving element (80) drives the action element (20) to move; An operating component (20) is arranged in the valve housing (10) to form a first chamber (13a) and a second chamber (13b); The action component (20) is provided with a pivot (30) and moves with the action element (20); a delivery valve (50) disposed on the pivot (30); As the actuating element (20) moves, the first chamber (13a) is compressed, and the flow of the medium between the first chamber (13a) and the second chamber (13b) is not hindered by the delivery valve (50). Otherwise, the delivery valve (50) hinders the flow of the medium between the first chamber (13a) and the second chamber (13b).

2. A damping control valve for a shock absorber as claimed in claim 1, characterized in that: The delivery valve (50) is configured as a check valve between the first chamber (13a) and the second chamber (13b), and is capable of moving relative to the pivot (30) to open and close the medium channel between the first chamber (13a) and the second chamber (13b).

3. A damping control valve for a shock absorber as claimed in claim 1, characterized in that: The delivery valve (50) is opened and closed in an axial or radial manner relative to the pivot shaft (30).

4. A damping control valve for a shock absorber as claimed in claim 1, characterized in that: The side of the delivery valve (50) in contact with the first chamber (13a) has at least one surface to which pressure is applied by the damping medium.

5. A damping control valve for a shock absorber as claimed in claim 1, characterized in that: The pivot (30) is provided with a flow opening (33), and the flow opening (33) is used to connect the first cavity (13a) and the inner cavity of the pivot (30).

6. A damping control valve for a shock absorber as claimed in claim 1, characterized in that: There is a reciprocating channel (35) in the inner cavity of the pivot (30), wherein the reciprocating flow of the medium between the first cavity (13a) and the second cavity (13b) uses the same reciprocating channel of the pivot (6).

7. A damping control valve for a shock absorber as claimed in claim 1, characterized in that: The delivery valve (50) comprises: A valve seat (51) fixedly connected to the pivot (30); A valve core (52) is slidably connected to the pivot (30) and is movable along the axial direction of the pivot (30); A first elastic element (53), the first elastic element (53) being interposed between the valve seat (51) and the valve core (52); Wherein, under the action of the medium pressure in the first chamber (13a), the valve core (52) can be driven to move toward the valve seat (51) to connect the first chamber (13a) and the second chamber (13b).

8. A damping control valve for a shock absorber as claimed in claim 7, characterized in that: The valve seat (51), the valve core (52) and the first elastic element (53) are all arranged in the pivot (30), and a medium flow channel is arranged in the middle of the valve seat (51) and the valve core (52).

9. A damping control valve for a shock absorber as claimed in claim 7, characterized in that: The delivery valve (50) is a single component that enables the valve to be opened and reset.

10. A damping control valve for a shock absorber as claimed in claim 7, characterized in that: It also includes a control assembly (90), wherein the control assembly (90) includes a control element (40), and the control assembly (90) can transmit the action of the action component (20) to adjust the damping force.

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