An adjustable damping regulating valve and shock absorber

Abstract

The application provides an adjustable damping adjusting valve and a shock absorber. The adjusting valve comprises a valve seat, an oil guide pipe, a valve rod and a limiting piece. The oil guide pipe is arranged on the valve seat, and a containing cavity is formed between the valve seat and the oil guide pipe. The oil guide pipe is provided with a first communication part and a second communication part which are in communication with the outside. The first communication part and the second communication part are in communication through the containing cavity. The valve rod is movably arranged in the containing cavity. The valve rod is used for plugging the first communication part and is also used for moving the first communication part and the second communication part to be in communication under the action of oil pressure. The limiting piece is arranged on the valve seat and is used for moving in the containing cavity under the action of external force to limit the maximum displacement of the valve rod. A first sealing piece is arranged between the oil guide pipe and the valve seat, a second sealing piece is arranged between the valve seat and the limiting piece, and the first sealing piece and the second sealing piece are both used for sealing the containing cavity. The adjusting valve provided by the application can realize more accurate and smooth control of the damping force of the shock absorber.

Description

Technical Field

[0001] This application relates to the field of shock absorber technology, specifically to an adjustable damping regulating valve and a shock absorber. Background Technology

[0002] Adjustable damping control valves are core hydraulic control components in adjustable shock absorbers and are widely used in automotive suspension systems. Their basic principle is to regulate the flow of oil through the valve body by changing the valve core opening, thereby achieving real-time, dynamic control of the shock absorber's damping force. The valve stem, as a key actuator that directly responds to changes in oil pressure and performs displacement motion, directly determines the control accuracy and response quality of the entire damping adjustment system through its sensitivity, linearity, and positional precision.

[0003] In existing technologies, a common approach to sealing the high-pressure oil chamber inside a regulating valve is to directly fit a sealing element (such as an O-ring or star-shaped ring) onto the valve stem, relying on the interference fit and continuous contact between the sealing element and the inner wall of the oil guide chamber where the valve stem is located to achieve dynamic sealing. However, in practical applications, regulating valves using this traditional sealing structure exhibit unpredictable deviations and hysteresis between the actual valve stem opening and the theoretically expected value, making it difficult to precisely adjust the oil flow rate based on the valve stem opening. This ultimately affects the accuracy, stability, and smoothness of shock absorber damping force adjustment, making it difficult to meet the stringent requirements of high-performance suspension systems for response linearity and control finesse. Utility Model Content

[0004] In order to overcome the shortcomings of the prior art, this application provides an adjustable damping regulating valve and a shock absorber.

[0005] The specific technical solution is as follows: An adjustable damping control valve includes a valve seat, an oil guide tube, a valve stem, and a limiting element; The oil guide pipe is disposed on the valve seat, and a receiving cavity is formed between the valve seat and the oil guide pipe. The oil guide pipe is provided with a first conductive part and a second conductive part communicating with the outside. The first conductive part and the second conductive part are connected through the receiving cavity. The valve stem is movably disposed in the receiving cavity. The valve stem is used to block the first conductive part and also to move under the action of oil pressure to make the first conductive part and the second conductive part connect. The limiting member is disposed on the valve seat and is used to move in the receiving cavity under the action of external force to limit the maximum displacement of the valve stem. A first sealing element is provided between the oil guide pipe and the valve seat, and a second sealing element is provided between the valve seat and the limiting element. Both the first sealing element and the second sealing element are used to seal the receiving cavity.

[0006] In one embodiment, the system further includes an oil guide tube seat, which is sleeved on the outer periphery of the oil guide tube. The first conductive portion and the second conductive portion are exposed through the oil guide tube seat, and a third sealing element is provided between the oil guide tube seat and the oil guide tube.

[0007] In one embodiment, the number of the first seals is two, and the two first seals are arranged sequentially along the axis of the adjustable damping regulating valve; And / or, the number of the second seals is two, and the two second seals are arranged sequentially along the axis of the adjustable damping regulating valve.

[0008] In one embodiment, there are two third seals, which are arranged sequentially along the axis of the adjustable damping regulating valve.

[0009] In one embodiment, a protrusion is provided on the valve seat, and the limiting member passes through the protrusion; The valve stem is equipped with an elastic element, one end of which is sleeved on the valve stem and the other end of which is sleeved on the protrusion.

[0010] In one embodiment, the limiting member is equipped with a rotating member, which is sleeved on the valve seat; The limiting member includes a first connecting section and a second connecting section. The first connecting section is threadedly connected to the protruding post, and the second connecting section protrudes from the valve seat and is inserted into the rotating member. The cross-section of the second connecting section is non-circular.

[0011] In one embodiment, the protruding post is provided with a channel, the inner surface of the channel is provided with an internal thread, the first connecting segment is provided with an external thread, and the internal thread is threadedly connected to the external thread.

[0012] In one embodiment, a first groove is provided on the bottom wall of the rotating component, and the depth of the first groove is between 0.2mm and 3mm.

[0013] In one embodiment, a second groove is provided on the side wall of the rotating component, and the second groove has an arc-shaped surface.

[0014] A shock absorber includes a working cylinder, an oil reservoir, a piston assembly, and a regulating valve with adjustable damping. The piston assembly is movably mounted on the working cylinder, and the oil guide pipe of the adjustable damping regulating valve is connected to the working cylinder and the oil reservoir respectively, so that the first conductive part is connected to the inside of the working cylinder and the second conductive part is connected to the inside of the oil reservoir.

[0015] This application has at least the following beneficial effects: This application provides an adjustable damping regulating valve, including a valve seat, an oil guide pipe, a valve stem, and a limiting member. The oil guide pipe is disposed on the valve seat, and a receiving cavity is formed between the valve seat and the oil guide pipe. The oil guide pipe is provided with a first conductive part and a second conductive part communicating with the outside, and the first conductive part and the second conductive part are connected through the receiving cavity. The valve stem is movably disposed in the receiving cavity. The valve stem is used to block the first conductive part and also to move under the action of oil pressure to make the first conductive part and the second conductive part conductive. The limiting member is disposed on the valve seat and is used to move in the receiving cavity under the action of external force to limit the maximum displacement of the valve stem. A first sealing member is provided between the oil guide pipe and the valve seat, and a second sealing member is provided between the valve seat and the limiting member. Both the first sealing member and the second sealing member are used to seal the receiving cavity.

[0016] The adjustable damping regulating valve provided in this application, by placing a first seal between the oil guide pipe and the valve seat, and a second seal between the valve seat and the limiting member, makes the sealing structure for sealing the receiving cavity completely independent of the movable valve stem. Compared to the traditional approach in the prior art where the seal is directly placed on the valve stem and relies on its dynamic contact with the inner wall of the oil guide cavity, this application completely avoids the interference of sliding friction resistance generated between the seal and the cavity wall during the reciprocating motion of the valve stem on the sensitivity and positional accuracy of the valve stem. This application enables the valve stem displacement to respond more linearly and directly to changes in oil pressure, thereby significantly improving the accuracy and stability of adjusting the oil flow through the valve stem opening. Furthermore, the regulating valve of this application can achieve more precise and smooth control of the damping force of the shock absorber, effectively improving the linearity and control fineness of the suspension system's response to external excitation, and better meeting the stringent technical requirements of high-performance suspension systems for the core components of adjustable shock absorbers. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the overall structure of a shock absorber provided in this embodiment; Figure 2 for Figure 1 Schematic diagram of the cross section of line AA; Figure 3 for Figure 2 Local magnification of region A Figure 1 ; Figure 4 for Figure 2 Local magnification of region A Figure 2 .

[0019] Figure label: 1-Valve seat; 2-Oil guide tube; 3-Valve stem; 4-Limiting element; 5-Receiving cavity; 7-Oil guide tube seat; 8-Elastic element; 9-Rotating element; 11-Protrusion; 12-First annular groove; 21-First conductive part; 22-Second conductive part; 23-Inner cavity; 41-First connecting section; 42-Second connecting section; 43-Second annular groove; 61-First sealing element; 62-Second sealing element; 63-Third sealing element; 91-First groove; 92-Second groove; 111-Channel; 112-Internal thread; 411-External thread; 10-Shock absorber; 101-Working cylinder; 102-Oil reservoir; 103-Piston assembly. Detailed Implementation

[0020] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0021] In the description of this application, it should be noted that the terms "vertical", "up", "down", "horizontal", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0022] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0023] like Figure 3 and Figure 4 As shown, this embodiment provides an adjustable damping regulating valve, including a valve seat 1, an oil guide pipe 2, a valve stem 3, and a limiting member 4; An oil guide pipe 2 is disposed on a valve seat 1, forming a receiving cavity 5 between the valve seat 1 and the oil guide pipe 2. The oil guide pipe 2 is provided with a first conductive part 21 and a second conductive part 22 that communicate with the outside. The first conductive part 21 and the second conductive part 22 are connected through the receiving cavity 5. The valve stem 3 is movably disposed in the receiving cavity 5. The valve stem 3 is used to block the first conductive part 21 and also to move under the action of oil pressure to make the first conductive part 21 and the second conductive part 22 conduct. A limiting member 4 is disposed on the valve seat 1 and is used to move in the receiving cavity 5 under the action of external force to limit the maximum displacement of the valve stem 3. A first sealing element 61 is provided between the oil guide pipe 2 and the valve seat 1, and a second sealing element 62 is provided between the valve seat 1 and the limiting element 4. Both the first sealing element 61 and the second sealing element 62 are used to seal the receiving cavity 5.

[0024] The adjustable damping regulating valve provided in this embodiment, by placing the first seal 61 between the oil guide pipe 2 and the valve seat 1, and placing the second seal 62 between the valve seat 1 and the limiting member 4, makes the sealing structure for sealing the receiving cavity 5 completely independent of the movable valve stem 3. Compared with the traditional solution in the prior art where the seal is directly placed on the valve stem 3 and relies on its dynamic contact with the inner wall of the oil guide cavity, this embodiment completely avoids the interference of the sliding friction resistance generated between the seal and the cavity wall on the sensitivity and positional accuracy of the valve stem 3 during the reciprocating motion of the valve stem 3. This application enables the displacement of the valve stem 3 to respond more linearly and directly to changes in oil pressure, thereby significantly improving the accuracy and stability of adjusting the oil flow through the valve stem 3 opening. Furthermore, the regulating valve of this embodiment can achieve more precise and smooth control of the damping force of the shock absorber 10, effectively improving the linearity and control fineness of the suspension system's response to external excitation, and better meeting the stringent technical requirements of high-performance suspension systems for the core component of the adjustable shock absorber 10.

[0025] like Figure 3 and Figure 4 As shown, in one embodiment, the first guide portion 21 is a radial opening provided on the oil guide pipe 2, and the second guide portion 22 is an axial opening provided on the oil guide pipe 2, so that the oil can reliably flow from the first guide portion 21 through the receiving cavity 5 to the second guide portion 22, or in the opposite direction from the second guide portion 22 through the receiving cavity 5 to the first guide portion 21.

[0026] like Figure 3 and Figure 4 As shown, in one embodiment, the oil guide tube 2 has an axially arranged inner cavity 23, and a portion of the valve seat 1 extends into the inner cavity 23 and closes the opening of the inner cavity 23, so that a receiving cavity 5 is formed between the oil guide tube 2 and the valve seat 1.

[0027] In one embodiment, the portion of the valve seat 1 extending into the inner cavity 23 is provided with a first annular groove 12. The first annular groove 12 is located in the joint area between the oil guide tube 2 and the valve seat 1, so that the first seal 61 is statically pressed between the inner wall of the oil guide tube 2 and the first annular groove 12.

[0028] In one embodiment, the first seal 61 is an O-ring or a rectangular ring.

[0029] like Figure 3 and Figure 4 As shown, in one embodiment, there are two first seals 61, which are arranged sequentially along the axis of the adjustable damping regulating valve. The use of dual first seals 61 forms a series sealing barrier, which significantly enhances the sealing reliability and durability of the critical static sealing interface between the oil guide tube 2 and the valve seat 1, especially in meeting the long-term stability requirements under high-pressure oil, and reducing the risk of single-point failure.

[0030] like Figure 3 and Figure 4 As shown, in one embodiment, the adjustable damping regulating valve further includes an oil guide seat 7, which is sleeved on the outer periphery of the oil guide tube 2. The first conductive part 21 and the second conductive part 22 are exposed on the oil guide seat 7, and a third sealing member 63 is provided between the oil guide seat 7 and the oil guide tube 2.

[0031] This embodiment adds an oil guide pipe seat 7 to facilitate the connection and installation of the regulating valve with an external oil circuit (such as an oil reservoir 102). At the same time, a third sealing element 63 is provided to seal the gap between the oil guide pipe 2 and the oil guide pipe seat 7, preventing oil from leaking out or causing undesirable crossflow, and ensuring that the oil flows strictly according to the designed path (through the first conductive part 21, the receiving cavity 5, and the second conductive part 22).

[0032] like Figure 3 and Figure 4 As shown, in one embodiment, there are two third seals 63, which are arranged sequentially along the axis of the adjustable damping regulating valve. The use of dual third seals 63 provides redundant sealing protection for the connection between the oil guide pipe 2 and the oil guide pipe seat 7, ensuring that the seal at this connection remains effective for a long time under vibration and pressure pulsation conditions, further improving the leakage prevention performance of the entire valve assembly.

[0033] like Figure 3 and Figure 4 As shown, in one embodiment, a protrusion 11 is provided on the valve seat 1, and the limiting member 4 passes through the protrusion 11; the valve stem 3 is provided with an elastic member 8, one end of which is sleeved on the valve stem 3 and the other end of which is sleeved on the protrusion 11. In this embodiment, the protrusion 11 provides a precise guide and mounting foundation for the limiting member 4 and the elastic member 8.

[0034] Specifically, the elastic element 8 provides a restoring force to the valve stem 3. When the oil pressure decreases, the elastic element 8 pushes the valve stem 3 to reset, re-sealing the first conductive part 21.

[0035] Specifically, the elastic element 8 is a helical spring.

[0036] like Figure 3 and Figure 4 As shown, in one embodiment, the limiting member 4 is equipped with a rotating member 9, which is sleeved on the valve seat 1; The limiting member 4 includes a first connecting section 41 and a second connecting section 42. The first connecting section 41 is threadedly connected to the protrusion 11, and the second connecting section 42 is exposed outside the valve seat 1 and is inserted into the rotating member 9. The cross-section of the second connecting section 42 is non-circular.

[0037] In this embodiment, the first connecting section 41 is threadedly connected to the protrusion 11, allowing the user to precisely adjust the axial position of the limiting member 4 within the receiving cavity 5 by rotating the limiting member 4, thereby setting the maximum stroke of the valve stem 3. Simultaneously, the rotating member 9 is inserted into the second connecting section 42, which has a non-circular cross-section (such as a hexagon), allowing the user to conveniently apply rotational torque to adjust the limiting member 4 without directly contacting the limiting member 4 body, thus improving the convenience and operability of the adjustment.

[0038] like Figure 3 and Figure 4 As shown, in one embodiment, the protruding post 11 is provided with a channel 111, the inner surface of the channel 111 is provided with an internal thread 112, the first connecting section 41 is provided with an external thread 411, and the internal thread 112 is threadedly connected to the external thread 411.

[0039] In one embodiment, the limiting member 4 is provided with a second annular groove 43, which is located in the joint area between the limiting member 4 and the protrusion 11, so that the second sealing member 62 is statically pressed between the inner wall of the channel 111 and the second annular groove 43.

[0040] In one embodiment, the second seal 62 is an O-ring or a rectangular ring.

[0041] In one embodiment, two second seals 62 are arranged sequentially along the axis of the adjustable damping control valve. The dual second seals 62 form a series sealing barrier, significantly enhancing the sealing reliability and durability of the critical static sealing interface between the limiter 4 and the valve seat 1. The dual-seal structure more effectively prevents oil leakage from the receiving cavity 5 and also better blocks the intrusion of external contaminants, ensuring a clean and stable working environment and pressure within the control valve.

[0042] like Figure 3 and Figure 4As shown, in one embodiment, a first groove 91 is provided on the bottom wall of the rotating component 9, and the depth of the first groove 91 is between 0.2mm and 3mm. In this embodiment, the first groove 91 provides a space for the label sticker, preventing the label sticker from protruding from the bottom wall of the rotating component 9.

[0043] like Figure 3 and Figure 4 As shown, in one embodiment, a second groove 92 is provided on the side wall of the rotating member 9, and the second groove 92 has an arc-shaped surface. This embodiment provides a more ergonomic grip surface by providing an arc-shaped surface on the side wall of the rotating member 9, making the adjustment operation more effortless and smoother.

[0044] like Figure 1 and Figure 2 As shown, this embodiment also provides a shock absorber 10, including a working cylinder 101, an oil reservoir 102, a piston assembly 103, and an adjustable damping regulating valve as described in any of the above embodiments; The piston assembly 103 is movably mounted on the working cylinder 101. The oil guide pipe 2 of the adjustable damping regulating valve is connected to the working cylinder 101 and the oil reservoir 102 respectively, so that the first conductive part 21 is connected to the inside of the working cylinder 101 and the second conductive part 22 is connected to the inside of the oil reservoir 102.

[0045] The shock absorber 10 provided in this embodiment, by integrating the aforementioned adjustable damping regulating valve, can utilize the advantages of its valve stem 3's sensitive movement and precise adjustment to achieve real-time, accurate, and linear control of the damping force of the shock absorber 10. When the piston assembly 103 moves, the change in oil pressure within the working cylinder 101 drives the valve stem 3 of the regulating valve to move, changing the opening of the bypass oil circuit, thereby finely adjusting the damping force. Ultimately, this improves the vehicle suspension system's adaptability to different road conditions, ride comfort, and handling stability.

[0046] 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.

[0047] 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 regulating valve with adjustable damping, characterized in that, Includes valve seat, oil guide tube, valve stem, and limiting components; The oil guide pipe is disposed on the valve seat, and a receiving cavity is formed between the valve seat and the oil guide pipe. The oil guide pipe is provided with a first conductive part and a second conductive part communicating with the outside. The first conductive part and the second conductive part are connected through the receiving cavity. The valve stem is movably disposed in the receiving cavity. The valve stem is used to block the first conductive part and also to move under the action of oil pressure to make the first conductive part and the second conductive part connect. The limiting member is disposed on the valve seat and is used to move in the receiving cavity under the action of external force to limit the maximum displacement of the valve stem. A first sealing element is provided between the oil guide pipe and the valve seat, and a second sealing element is provided between the valve seat and the limiting element. Both the first sealing element and the second sealing element are used to seal the receiving cavity.

2. The adjustable damping regulating valve according to claim 1, characterized in that, It also includes an oil guide tube seat, which is sleeved on the outer periphery of the oil guide tube. The first and second conductive parts are exposed on the oil guide tube seat, and a third sealing element is provided between the oil guide tube seat and the oil guide tube.

3. The adjustable damping regulating valve according to claim 1, characterized in that, The number of the first seal is two, and the two first seals are arranged sequentially along the axis of the adjustable damping regulating valve; And / or, the number of the second seals is two, and the two second seals are arranged sequentially along the axis of the adjustable damping regulating valve.

4. The adjustable damping regulating valve according to claim 2, characterized in that, The number of the third seals is two, and the two third seals are arranged sequentially along the axis of the adjustable damping regulating valve.

5. The adjustable damping regulating valve according to claim 1, characterized in that, The valve seat is provided with a protrusion, and the limiting member passes through the protrusion; The valve stem is equipped with an elastic element, one end of which is sleeved on the valve stem and the other end of which is sleeved on the protrusion.

6. The adjustable damping regulating valve according to claim 5, characterized in that, The limiting member is equipped with a rotating member, which is sleeved on the valve seat; The limiting member includes a first connecting section and a second connecting section. The first connecting section is threadedly connected to the protruding post, and the second connecting section protrudes from the valve seat and is inserted into the rotating member. The cross-section of the second connecting section is non-circular.

7. The adjustable damping regulating valve according to claim 6, characterized in that, The protruding post is provided with a channel, and the inner surface of the channel is provided with an internal thread. The first connecting section is provided with an external thread, and the internal thread is threadedly connected to the external thread.

8. The adjustable damping regulating valve according to claim 6, characterized in that, The bottom wall of the rotating component has a first groove, the depth of which is between 0.2mm and 3mm.

9. The adjustable damping regulating valve according to claim 6, characterized in that, The rotating component has a second groove on its side wall, and the second groove has an arc-shaped surface.

10. A shock absorber, characterized in that, It includes a working cylinder, an oil reservoir, a piston assembly, and an adjustable damping regulating valve as described in any one of claims 1-9; The piston assembly is movably mounted on the working cylinder, and the oil guide pipe of the adjustable damping regulating valve is connected to the working cylinder and the oil reservoir respectively, so that the first conductive part is connected to the inside of the working cylinder and the second conductive part is connected to the inside of the oil reservoir.

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