CN116006620A - Piston, adjustable valve, shock absorber and control method for hydraulic oil of shock absorber - Google Patents

Abstract

The present application relates to the technical field of shock absorbers, in particular to a piston, an adjustable valve, a shock absorber and a control method for hydraulic oil of the shock absorber. The piston includes a piston body, a first boss protrudes from the central axis of the piston body and on the flow side, and a through shaft hole for the piston rod to pass is opened along the extension direction of the central axis of the first boss; A first through hole close to the central axis and a second through hole far away from the central axis are opened in the direction, and the first through holes and the second through holes are respectively arranged at intervals in the circumferential direction; on the flow side, the second through hole corresponds to A second boss is provided at the hole, and the second boss is provided with a second conduction groove communicating with the second through hole; a first through hole capable of conducting with the first through hole is formed between adjacent second bosses. The conduction groove; the edge of the second conduction groove is protruded with a convex edge and the third conduction groove is opened on the convex edge. In summary, when the adjustable valve is applied to a shock absorber, it can provide both restoring damping force and compression damping force.

Description

Piston, adjustable valve, shock absorber and control method for hydraulic oil of shock absorber

technical field

The present application relates to the technical field of shock absorbers, in particular to a piston, an adjustable valve, a shock absorber and a control method for hydraulic oil of the shock absorber.

Background technique

The shock absorber (Absorber) is used to suppress the shock when the spring rebounds after absorbing the shock and the impact from the road surface. It is widely used in automobiles to accelerate the attenuation of frame and body vibrations and improve the ride comfort of automobiles.

The existing valve system is a flow valve structure composed of a valve plate and a spring plate. Its structure and performance are single. The valve system can only provide the adjustment of the restoration damping force alone, and cannot provide the adjustment of the compression damping force. For example, the patent No. For the structure disclosed in 201220405524.5, the recovery valve system of this structure cannot provide compression damping force, the flow side of the valve system only plays a sealing role, and the compression damping force is provided solely by the compression valve.

However, with the development of technology in the shock absorber industry, various models have higher and higher performance requirements for shock absorbers, and the original valve train structure with springs can no longer meet the tuning needs of OEMs. Therefore, there is an urgent need for a piston, an adjustable valve, a shock absorber and a control method for shock absorber hydraulic oil to solve the technical problems existing in the prior art to a certain extent.

Contents of the invention

The purpose of this application is to provide a piston, an adjustable valve, a shock absorber and a method for regulating the hydraulic oil of the shock absorber, so as to solve the problem that the valve train structure in the prior art can only provide restoring damping force and not The technical problem of not being able to provide compression damping force.

The application provides a piston, including a piston body, one side of the piston body is a flow side and the other side is a recovery side; a first protrusion protrudes from the central axis of the piston body and on the flow side platform, along the extension direction of the central axis of the first boss, there is a shaft through hole for the piston rod to pass through; the piston body is provided with a first through hole close to the central axis and a first through hole away from the central axis along the radial direction. The second through hole on the central axis, and the first through hole and the second through hole are respectively arranged at intervals in the circumferential direction;

A second boss is provided on the circulation side corresponding to the second through hole, and the second boss is provided with a second conduction groove communicating with the second through hole; adjacent to the second A first conduction groove capable of conducting with the first through hole is formed between the bosses;

A protruding edge protrudes from the edge of the second conduction groove, and a third conduction groove is formed on the protruding edge.

The present application also provides an adjustable valve, including a compression-side assembly, a recovery-side assembly, a piston rod, and the above-mentioned piston;

The piston rod passes through the through-axis hole of the piston;

The compression side component is sleeved on the piston rod on the flow side, and the compression side component overlaps the convex edge to cover the second guide groove; the compression side component includes a compression valve plate , the compression valve plate is provided with a plurality, and the plurality of compression valve plates are stacked and arranged in sequence along the first direction;

The restoring side assembly is sheathed on the piston rod on the restoring side.

In the above technical solution, further, there are four compression valve plates, and the diameters of the four compression valve plates arranged along the first direction increase sequentially.

In the above technical solution, further, the recovery side component includes a sleeve nut, a regulating valve plate, a recovery valve plate, a sealing ring assembly, a recovery spring and a locking nut;

The bushing nut is sleeved on the piston rod on the restoration side, and the lock nut is located at the end of the piston rod on the restoration side;

The regulating valve plate, the restoring valve plate and the restoring spring are sequentially sleeved on the piston rod along the first direction, one end of the restoring spring abuts against the restoring valve plate and the other end abuts against on the locknut.

In the above technical solution, further, there are multiple restoration valve sheets, and the plurality of restoration valve sheets are arranged along the first direction.

In the above technical solution, further, the number of the restoration valve slices is 4;

At least one of the restorative valve slices except the restorative valve slices close to the regulating valve slice is a waist-shaped restoring valve slice.

In the above technical solution, further, the peripheral edge of the regulating valve plate is spaced with regulating grooves;

At least part of the adjustment slots are connected to the first conduction slots.

In the above technical solution, further, the restoration side assembly further includes a cover hole valve plate, and the cover hole valve plate is sleeved on the piston rod and located between the piston and the sleeve nut.

The present application also provides a shock absorber, including the above-mentioned piston or the above-mentioned adjustable valve.

The present application also provides a method for regulating hydraulic oil used in shock absorbers, including the establishment of compression damping force and restoration damping force;

The establishment of the compression damping force is that when the tire is jumping up, the adjustable valve moves in the first direction relative to the main body of the shock absorber; when the vehicle speed is low, the hydraulic oil passes through the second through hole and the second conduction groove in sequence And the third pilot valve is introduced from the recovery side to the circulation side to generate low-speed compression damping force; when the vehicle speed is high, the pressure oil passes through the second through hole and the second pilot groove in sequence and pushes the compression valve plate Introduced from the recovery side to the flow side to generate high-speed compression damping force;

The establishment of the restoration damping force is that when the tire is jumping down, the adjustable valve moves in a direction opposite to the first direction relative to the shock absorber main body; when the vehicle speed is low, the The hydraulic oil is introduced from the flow side to the recovery side through the first guide groove, the first through hole and the regulating valve plate in order to generate a low-speed recovery damping force; when the vehicle speed is medium, the hydraulic oil passes through the The first guide groove, the first through hole, and the restoration valve plate are pushed from the flow side to the restoration side to generate a medium-speed restoration damping force; when the vehicle speed is high, the hydraulic oil passes through the first A conduction slot, the first through hole, and the restoration valve plate and the restoration spring are introduced from the flow side to the restoration side to generate a high-speed restoration damping force.

Compared with the prior art, the beneficial effects of the present application are:

The application provides a piston, including a piston body, one side of the piston body is a flow side and the other side is a recovery side; a first boss protrudes from the central axis of the piston body and on the flow side A through-axis hole for the piston rod to pass through is opened along the central axis of the first boss; a first through hole close to the central axis and a first through hole away from the central axis are opened in the piston body along the radial direction. The second through hole of the axis, and the first through hole and the second through hole are respectively arranged at intervals in the circumferential direction;

A second boss is provided on the circulation side corresponding to the second through hole, and the second boss is provided with a second conduction groove communicating with the second through hole; adjacent to the second A first conduction groove capable of conducting with the first through hole is formed between the bosses;

A protruding edge protrudes from the edge of the second conduction groove, and a third conduction groove is formed on the protruding edge.

To sum up, the piston is applied to the shock absorber, which can provide both restoring damping force and compression damping force.

The present application also provides an adjustable valve, including a compression side component, a recovery side component, a piston rod and the above-mentioned piston; the piston rod passes through the shaft hole;

The compression side component is sleeved on the piston rod on the flow side, and the compression side component overlaps the convex edge to cover the second guide groove; the compression side component includes a compression valve plate There are a plurality of compression valve plates, and the plurality of compression valve plates are stacked and arranged in sequence along the first direction; the recovery side assembly is sleeved on the piston rod on the recovery side.

In summary, the adjustable valve can provide both restoration damping force and compression damping force on the restoration side. Moreover, through the ingenious combination of the piston, the compression valve plate and the recovery valve plate, the adjustable valve can provide a higher adjustment range of the compression damping force and the recovery damping force, so as to meet the needs of customers.

In this embodiment, a shock absorber is provided, including the above-mentioned piston or the above-mentioned adjustable valve. Therefore, it has all the beneficial effects of the above-mentioned piston or adjustable valve, which will not be elaborated here.

The present application also provides a method for regulating hydraulic oil used in shock absorbers, including the establishment of compression damping force and restoration damping force;

The establishment of the compression damping force is that when the tire is jumping up, the adjustable valve moves in the first direction relative to the main body of the shock absorber; when the vehicle speed is low, the hydraulic oil passes through the second through hole and the second conduction groove in sequence And the third pilot valve is introduced from the recovery side to the circulation side to generate low-speed compression damping force; when the vehicle speed is high, the pressure oil passes through the second through hole and the second pilot groove in sequence and pushes the compression valve plate Introduced from the recovery side to the flow side to generate high-speed compression damping force;

The establishment of the restoration damping force is that when the tire is jumping down, the adjustable valve moves in a direction opposite to the first direction relative to the shock absorber main body; when the vehicle speed is low, the The hydraulic oil is introduced from the flow side to the recovery side through the first guide groove, the first through hole and the regulating valve plate in order to generate a low-speed recovery damping force; when the vehicle speed is medium, the hydraulic oil passes through the The first guide groove, the first through hole, and the restoration valve plate are pushed from the flow side to the restoration side to generate a medium-speed restoration damping force; when the vehicle speed is high, the hydraulic oil passes through the first A conduction slot, the first through hole, and the restoration valve plate and the restoration spring are introduced from the flow side to the restoration side to generate a high-speed restoration damping force.

In summary, the adjustable valve can provide both restoration damping force and compression damping force on the restoration side. Moreover, through the ingenious combination of the piston, the compression valve plate and the recovery valve plate, the adjustable valve can provide a higher adjustment range of the compression damping force and the recovery damping force, so as to meet the needs of customers.

Description of drawings

In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the following will briefly introduce the accompanying drawings that need to be used in the description of the specific embodiments or prior art. Obviously, the accompanying drawings in the following description The drawings are some implementations of the present application, and those skilled in the art can obtain other drawings based on these drawings without creative work.

Fig. 1 is a schematic structural diagram of the piston provided in Embodiment 1 of the present application at a first viewing angle;

Fig. 2 is a schematic structural diagram of the piston provided in Embodiment 1 of the present application under a second viewing angle;

Fig. 3 is a structural schematic diagram of the regulating valve provided in Embodiment 2 of the present application under a first viewing angle;

Figure 4 is an enlarged view of A in Figure 3;

Fig. 5 is a schematic structural diagram of the regulating valve provided in Embodiment 2 of the present application under a second viewing angle;

FIG. 6 is an exploded view of the regulating valve provided in Embodiment 2 of the present application;

Fig. 7 is a cross-sectional view of the regulating valve provided in Embodiment 2 of the present application;

FIG. 8 is a schematic structural diagram of the regulating valve plate in the regulating valve provided in Embodiment 2 of the present application.

Reference signs:

1-Piston body; 2-First boss; 3-Through shaft hole; 4-First through hole; 5-Second through hole; 6-Second boss; Two guide grooves; 9-convex edge; 10-third guide groove; 11-compression side components; 12-recovery side components; 13-piston rod; 14-first compression valve plate; 15-first direction; 16 -casing nut; 17-regulating valve piece; 18-first recovery valve piece; 19-O-ring; 20-recovery spring; 21-lock nut; 22-second recovery valve piece; 23-third recovery valve 24-the fourth restoration valve; 25-regulating groove; 26-cover hole valve; 27-the second compression valve; 28-the third compression valve; 29-the fourth compression valve; 30-O type Ring washer.

Detailed ways

The technical solutions of the present application will be clearly and completely described below in conjunction with the accompanying drawings. Apparently, the described embodiments are some of the embodiments of the present application, not all of them.

The components of the embodiments of the application generally described and shown in the figures herein may be arranged and designed in a variety of different configurations. Accordingly, the following detailed description of the embodiments of the application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely represents selected embodiments of the application.

Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of this application.

In the description of this application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" etc. The indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, use a specific orientation construction and operation, therefore should not be construed as limiting the application. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and should not be construed as indicating or implying relative importance.

In the description of this application, it should be noted that unless otherwise specified and limited, the terms "installation", "connection", and "connection" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection. Connected, or integrally connected; it may be mechanically connected or electrically connected; it may be directly connected or indirectly connected through an intermediary, and it may be the internal communication of two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in this application in specific situations.

Embodiment one

As shown in FIG. 1 and FIG. 2 , in this embodiment a piston is provided, the piston includes a piston body 1 , one side of the piston body 1 is a flow side and the other side is a recovery side.

Specifically, a first boss 2 protrudes from the central axis of the piston body 1 and on the flow side. The first boss 2 is preferably in the shape of a truncated cone. The through shaft hole 3 passed through; the piston body 1 is provided with a first through hole 4 close to the central axis and a second through hole 5 away from the central axis along the radial direction, and the first through hole 4 and the second through hole 5 are both They are respectively arranged at intervals in the circumferential direction; further, both the first through hole 4 and the second through hole 5 can be conducted from the circulation side of the piston body 1 to the recovery side; further, the first through hole 4 is a cylindrical hole , the number of the first through holes 4 is eight, the second through holes 5 are fan-shaped through holes in cross section, and the number of the second through holes 5 is four.

Specifically, a second boss 6 is provided at the position corresponding to the second through hole 5 on the flow side, and the second boss 6 is provided with a second conduction groove 8 communicating with the second through hole 5; preferably, the second boss 6 The cross-section of the platform 6 is fan-shaped; a first conduction groove 7 capable of conducting with the first through hole 4 is formed between adjacent second bosses 6 .

Specifically, a convex edge 9 protrudes from the edge of the second conducting groove 8 and a third conducting groove 10 is formed on the side of the convex edge 9 away from the central axis.

Further, the total height of the second boss 6 and the convex edge 9 along the direction of the central axis is equal to the height of the first boss 2 along the direction of the central axis.

In actual use, the piston can be used as an adjustable valve in the shock absorber.

Specifically, when the tire is in the process of jumping up, the adjustable valve moves in a vertically downward direction relative to the shock absorber body (the shock absorber body is a prior art and can be understood by those skilled in the art); When the vehicle speed is low, the hydraulic oil passes through the second through hole 5, the second conduction groove 8 and the third conduction groove 10 in sequence from the recovery side to the flow side to generate low-speed compression damping force; when the vehicle speed is high, the pressure oil Sequentially pass through the second through hole 5 and the second guide groove 8 and push the compression valve plate (the compression valve plate inside is one of the structures of the adjustable valve, which is the prior art, and those skilled in the art should be able to Understanding) from the restoration side to the flow side to generate high-speed compression damping force;

More specifically, when the tire is jumping down, the adjustable valve moves vertically upward relative to the main body of the shock absorber; when the vehicle speed is low, the hydraulic oil passes through the first guide The through groove 7, the first through hole 4 and the regulating valve plate 17 are introduced from the flow side to the recovery side to generate a low-speed recovery damping force; when the vehicle speed is medium, the hydraulic oil passes through the first channel in sequence Groove 7, the first through hole 4 and promote the recovery valve plate (the recovery valve plate inside is the prior art, those skilled in the art should be able to understand) from the flow side to the recovery side to generate medium speed Restoration damping force; when the vehicle speed is high speed, the hydraulic oil passes through the first guide groove 7 and the first through hole 4 in sequence and pushes the restoration valve plate and the restoration spring 20 (the restoration spring 20 inside is According to the existing technology, those skilled in the art should be able to understand) from the flow side to the recovery side to generate high-speed recovery damping force.

In summary, applying the piston to the shock absorber can provide both restoring damping force and compression damping force.

Embodiment two

In this embodiment, as shown in FIGS. 3-8 , an adjustable valve is provided, including a compression-side component 11 , a recovery-side component 12 , a piston rod 13 and the piston described in the first embodiment.

Specifically, the piston rod 13 passes through the shaft hole 3; the compression side component 11 is sleeved on the piston rod 13 on the flow side, and the compression side component 11 overlaps the flange 9 and the first boss 2 so as to cover the first Two conduction grooves 8; the compression side assembly 11 includes a compression valve plate, and there are multiple compression valve plates, and the multiple compression valve plates are respectively the first compression valve plate 14, the second compression valve plate 27, and the third compression valve plate 28 And the fourth compression valve plate 29, and the first compression valve plate 14, the second compression valve plate 27, the third compression valve plate 28 and the fourth compression valve plate 29 are along the first direction 15 (the first direction 15 here is Vertical downward direction) are stacked and arranged sequentially;

Further, the diameters of the first compression valve plate 14, the second compression valve plate 27, the third compression valve plate 28 and the fourth compression valve plate 29 are successively increased, so that the first compression valve plate 14, the second compression valve plate 27 , the third compression valve plate 28 and the fourth compression valve plate 29 form a tower-like structure.

Specifically, the recovery side component 12 is sheathed on the piston rod 13 on the recovery side. More specifically, the recovery side component 12 includes a sleeve nut 16, a regulating valve plate 17, a recovery valve plate, a sealing ring assembly, a recovery spring 20 and a lock nut 21; the sleeve nut 16 is sleeved on the recovery side The piston rod 13, the lock nut 21 is located at the end of the piston rod 13 on the recovery side; the regulating valve plate 17, the recovery valve plate and the recovery spring 20 are sequentially sleeved on the piston rod 13 in the vertical downward direction, and the recovery One end of the spring 20 abuts against the recovery valve plate and the other end abuts against the locking nut 21 .

Further, the sleeve nut 16 can increase the coaxiality dimension between the sleeve nut 16 and the piston rod 13 . At the same time, the sleeve nut 16 is used in conjunction with the lock nut 21, and the double nut structure improves the self-locking performance and has a better anti-loosening effect.

More specifically, the number of the restoration valve slices is four, and the four restoration valve slices are respectively the first restoration valve slice 18, the second restoration valve slice 22, the third restoration valve slice 23 and the fourth restoration valve slice 24; And the first reset valve slice 18 , the second reset valve slice 22 , the third reset valve slice 23 and the fourth reset valve slice 24 are arranged in sequence along the vertical downward direction.

Further, the second recovery valve piece 22 is a waist-shaped recovery valve piece.

More specifically, regulating grooves 25 are spaced apart from the peripheral edge of the regulating valve plate 17 ; and at least part of the regulating grooves 25 are in communication with the first conducting groove 7 .

In this embodiment, the recovery side component 12 further includes a cover hole valve plate 26 , the cover hole valve plate 26 is sleeved on the piston rod 13 and located between the piston and the sleeve nut 16 .

In this embodiment, the recovery side assembly 12 further includes an O-ring 19 and an O-ring gasket 30 sleeved on the sleeve nut 16, the O-ring gasket 30 is connected to the fourth recovery valve plate 24, and the recovery spring 20 One end ultimately abuts against the O-ring washer 30 and the other end abuts against the lock nut 21 .

Among them, the O-ring 19 improves the sealing performance of the recovery side, which can better ensure the consistency of product performance.

In actual use, the adjustable valve can be applied to the shock absorber.

Specifically, when the tire is in the process of jumping up, the adjustable valve moves in a vertically downward direction relative to the shock absorber body (the shock absorber body is a prior art and can be understood by those skilled in the art); When the speed is low, the hydraulic oil is introduced from the recovery side to the circulation side through the second through hole 5, the second conduction groove 8 and the third conduction groove 10 in order to generate low-speed compression damping force. During this process, by adjusting the third The size of the conduction groove 10 can adjust the low-speed compression damping force; when the vehicle speed is high, the pressure oil passes through the second through hole 5 and the second conduction groove 8 in sequence and pushes the fourth compression valve plate 29 in sequence , the third compression valve plate 28, the second compression valve plate 27 and the first compression valve plate 14 are introduced from the recovery side to the flow side to generate high-speed compression damping force; in this process, the stiffness of the compression valve plate can be adjusted. Adjust compression high-speed damping force.

It is worth noting that: since the diameters of the first compression valve plate 14, the second compression valve plate 27, the third compression valve plate 28 and the fourth compression valve plate 29 are successively increased, the first compression valve plate 14, the second compression valve plate The plate 27 , the third compression valve plate 28 and the fourth compression valve plate 29 finally form a structure similar to a tower, which will make the establishment of high-speed compression damping force more flexible.

More specifically, when the tire is jumping down, the adjustable valve moves vertically upward relative to the main body of the shock absorber; when the vehicle speed is low, the hydraulic oil passes through the first guide The through groove 7, the first through hole 4, and the regulating groove 25 on the regulating valve plate 17 are introduced from the flow side to the restoring side to generate a low-speed restoring damping force, and by adjusting the regulating groove 25 on the regulating valve plate 17 The size of the low-speed damping force can be adjusted; when the vehicle speed is at a medium speed, the hydraulic oil passes through the first guide groove 7 and the first through hole 4 in sequence and pushes the first restoring valve plate 18 and the second through-hole in turn. The recovery valve plate 22 (waist-shaped recovery valve plate), the third recovery valve plate 23 and the fourth recovery valve plate 24 are introduced from the flow side to the recovery side. During this process, the hydraulic oil causes the deformation of the compression valve plate, Thus, the medium-speed damping force is established; and by adjusting the number of recovery valve plates, the thickness of the waist-shaped recovery valve plate can adjust the size of the medium-speed damping force; when the vehicle speed is high, the hydraulic oil passes through the first guide in turn The through groove 7, the first through hole 4 and sequentially push the first return valve plate 18, the second return valve plate 22, the third return valve plate 23, the fourth return valve plate 24 and the return spring 20 from the flow side Introduce to the recovery side to generate high-speed recovery damping force. In other words, the deformation of the recovery valve plate has reached the limit at high speed, and the impact force of the hydraulic oil will push the recovery spring 20 to generate high-speed recovery damping force. In the process, by adjusting The stiffness and load of the return spring 20 are used to adjust the return high-speed damping force.

It is worth noting that: since the second recovery valve plate 22 is a waist-shaped recovery valve plate, when the hydraulic oil passes through the first guide groove 7 and the first through hole 4 and sequentially pushes the first recovery valve plate 18 and the second During the second recovery valve plate 22, the third recovery valve plate 23 and the fourth recovery valve plate 24, the first recovery valve plate 18 is on the second recovery valve plate 22 (the second recovery valve plate 22 is a waist-shaped recovery valve plate, the first recovery valve plate The recovery valve plate 18 is an annular plate) and under the impact of the hydraulic oil, the annular plate will be slightly deformed relative to the waist-shaped recovery valve plate, so that the hydraulic oil can pass through the first recovery valve plate 18, The second recovery valve plate 22 , the third recovery valve plate 23 and the fourth recovery valve plate 24 .

To sum up, the adjustable valve is applied to the shock absorber, which can provide both the restoration damping force and the compression damping force. Moreover, through the ingenious combination of the piston, the compression valve plate and the recovery valve plate, the adjustable valve can provide a higher adjustment range of the compression damping force and the recovery damping force, so as to meet the needs of customers.

Embodiment three

In this embodiment, a shock absorber is provided, including the above-mentioned piston or the above-mentioned adjustable valve. Therefore, it has all the beneficial effects of the above-mentioned piston or adjustable valve, which will not be elaborated here.

Embodiment four

In this embodiment, a regulation method for hydraulic oil of a shock absorber is provided, which specifically includes the establishment of compression damping force and restoration damping force;

Specifically, the establishment of the compression damping force is that when the tire is jumping up, the adjustable valve moves in the first direction relative to the main body of the shock absorber; when the vehicle speed is low, the hydraulic oil passes through the second through hole, the second The conduction groove and the third conduction groove are introduced from the recovery side to the circulation side to generate low-speed compression damping force; when the vehicle speed is high, the pressure oil passes through the second through hole and the second conduction groove in sequence The compression valve plate is introduced from the recovery side to the flow side to generate high-speed compression damping force;

More specifically, the establishment of the restoring damping force is that when the tire is jumping down, the adjustable valve moves in a direction opposite to the first direction relative to the shock absorber main body; the vehicle speed is a low speed When the vehicle speed is medium, the hydraulic oil is introduced from the flow side to the recovery side through the first guide groove, the first through hole and the regulating valve plate in order to generate a low-speed recovery damping force; when the vehicle speed is medium, the hydraulic oil Sequentially pass through the first guide groove, the first through hole and push the restoration valve plate from the flow side to the restoration side to generate a medium-speed restoration damping force; when the vehicle speed is high, the hydraulic oil in turn The restoration valve plate and the restoration spring are introduced from the flow side to the restoration side through the first guide slot and the first through hole to generate a high-speed restoration damping force.

In summary, the application of the adjustable valve in the shock absorber can provide both the restoration damping force and the compression damping force. Moreover, through the ingenious combination of the piston, the compression valve plate and the recovery valve plate, the adjustable valve can provide a higher adjustment range of the compression damping force and the recovery damping force, so as to meet the needs of customers.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and are not intended to limit it; although the application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: It is still possible to modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the technical solutions of the various embodiments of the present application. scope.

Claims (10)

1. A piston, comprising a piston body, one side of the piston body is a flow side and the other side is a recovery side; a first boss protrudes from the central axis of the piston body and on the flow side, A shaft through hole for the piston rod to pass through is opened along the central axis of the first boss; it is characterized in that the piston body is provided with a first through hole close to the central axis and a distance away from the central axis along the radial direction. The second through-holes on the central axis, and the first through-holes and the second through-holes are respectively circumferentially arranged at intervals; A second boss is provided on the circulation side corresponding to the second through hole, and the second boss is provided with a second conduction groove communicating with the second through hole; adjacent to the second A first conduction groove capable of conducting with the first through hole is formed between the bosses; A protruding edge protrudes from the edge of the second conduction groove, and a third conduction groove is formed on the protruding edge. 2. An adjustable valve, characterized in that it comprises a compression side assembly, a recovery side assembly, a piston rod and the piston described in claim 1; The piston rod passes through the shaft hole; The compression side component is sleeved on the piston rod on the flow side, and the compression side component overlaps the convex edge to cover the second guide groove; the compression side component includes a compression valve plate , the compression valve plate is provided with a plurality, and the plurality of compression valve plates are stacked and arranged in sequence along the first direction; The restoring side assembly is sheathed on the piston rod on the restoring side. 3 . The adjustable valve according to claim 2 , wherein there are four compression valve plates, and the diameters of the four compression valve plates arranged along the first direction increase sequentially. 4 . 4. The adjustable valve according to claim 2, characterized in that, the recovery side component comprises a sleeve nut, a regulating valve plate, a recovery valve plate, a sealing ring assembly, a recovery spring and a locking nut; The bushing nut is sleeved on the piston rod on the restoration side, and the lock nut is located at the end of the piston rod on the restoration side; The regulating valve plate, the restoring valve plate and the restoring spring are sequentially sleeved on the piston rod along the first direction, one end of the restoring spring abuts against the restoring valve plate and the other end abuts against on the locknut. 5 . The adjustable valve according to claim 4 , wherein there are multiple restoration valve slices, and the plurality of restoration valve slices are arranged along the first direction. 6 . 6. The adjustable valve according to claim 5, characterized in that, the number of the restoration valve plates is four; At least one of the restorative valve slices except the restorative valve slices close to the regulating valve slice is a waist-shaped restoring valve slice. 7. The adjustable valve according to claim 4, characterized in that, the peripheral edge of the regulating valve plate is spaced with regulating grooves; At least part of the adjustment slots are connected to the first conduction slots. 8. The adjustable valve according to claim 4, characterized in that, the recovery side component further comprises a cover hole valve plate, the cover hole valve plate is sleeved on the piston rod and located between the piston and the between the bushing nuts. 9. A shock absorber, characterized by comprising the piston as claimed in claim 1 or the adjustable valve as claimed in any one of claims 2-8. 10. A control method for hydraulic oil of a shock absorber, comprising the establishment of compression damping force and restoration damping force; The establishment of the compression damping force is that when the tire is jumping up, the adjustable valve moves in the first direction relative to the main body of the shock absorber; when the vehicle speed is low, the hydraulic oil passes through the second through hole and the second conduction groove in sequence And the third guide groove is introduced from the recovery side to the flow side to generate low-speed compression damping force; when the vehicle speed is high, the pressure oil passes through the second through hole and the second guide groove in sequence and pushes the compression valve plate Introduced from the recovery side to the flow side to generate high-speed compression damping force; The establishment of the restoration damping force is that when the tire is jumping down, the adjustable valve moves in a direction opposite to the first direction relative to the shock absorber main body; when the vehicle speed is low, the The hydraulic oil is introduced from the flow side to the recovery side through the first guide groove, the first through hole and the regulating valve plate in order to generate a low-speed recovery damping force; when the vehicle speed is medium, the hydraulic oil passes through the The first guide groove, the first through hole, and the restoration valve plate are pushed from the flow side to the restoration side to generate a medium-speed restoration damping force; when the vehicle speed is high, the hydraulic oil passes through the first A conduction slot, the first through hole, and the restoration valve plate and the restoration spring are introduced from the flow side to the restoration side to generate a high-speed restoration damping force.

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