CN220930047U - Flow regulating mechanism and electromagnetic valve for vibration damper - Google Patents

Abstract

The application provides a flow regulating mechanism and an electromagnetic valve for a shock absorber, wherein the flow regulating mechanism is applied to the electromagnetic valve in the shock absorber and comprises a pilot valve core, a pilot spring and a pilot valve seat, and the pilot spring is positioned between the pilot valve core and the pilot valve seat; an oil inlet cavity is arranged on the pilot valve seat and communicated with two sides of the pilot valve seat; the pilot valve core is provided with an adjusting column matched with the oil inlet cavity, and the adjusting column can axially move along with the pilot valve core so as to change the flow of the oil inlet cavity. According to the flow regulating mechanism, the flow in the oil inlet cavity is controlled by controlling the axial movement of the pilot valve core relative to the pilot valve seat, so that the damping size of the auxiliary regulating shock absorber is realized.

Description

Flow regulating mechanism and electromagnetic valve for vibration damper

Technical Field

The application relates to the technical field of vehicle vibration reduction devices, in particular to a flow regulating mechanism and an electromagnetic valve for a vibration damper.

Background

The shock absorber is an important component of an automobile suspension system and is used for inhibiting vibration and impact from a road surface when the shock absorbing spring rebounds after vibrating, and playing a role in damping the vibration of a frame and a vehicle body so as to improve the running smoothness and the operation stability of the automobile. The shock absorber comprises an electromagnetic valve, and the flow of oil in a cavity of the shock absorber is controlled through the electromagnetic valve, so that the damping of the shock absorber is adjusted, and the shock absorbing function of an automobile is realized; in the electromagnetic valve in the prior art, the pressure of the pilot valve cavity is controlled by adjusting the magnitude of the input current, and then the opening degree of the main valve core is controlled, so that the damping magnitude of the shock absorber is adjusted.

In the prior art, reference may be made to chinese patent publication No. CN219317506U, which provides a damper damping adjustable electromagnetic valve, the bottom of the installation cavity of which is further provided with a pilot valve for communicating the valve cavity with the oil outlet gap, the pilot valve includes an upper valve seat, a lower valve seat and a valve ball, a pilot cavity is formed between the upper valve seat and the lower valve seat, and pilot valve holes for communicating the valve cavity with the pilot cavity and communicating the pilot cavity with the oil outlet gap are respectively provided in the middle parts of the upper valve seat and the lower valve seat; the upper valve seat is also provided with an oil outlet small hole, and the lower valve seat is provided with a pilot return spring, so that the valve ball always has a trend of moving upwards to seal the upper valve seat; the upper end of the shell is provided with a push rod and an electromagnetic driving assembly for driving the push rod to move up and down, and when the electromagnetic driving assembly is powered on, the push rod can move downwards so that the valve ball moves downwards after overcoming the elasticity of a pilot return spring and hydraulic pressure; when in compression, a small part of oil in the oil inlet channel flows into the oil outlet channel through the fourth one-way valve after entering the pilot valve from the first one-way valve, the main valve core is opened under the action of the pilot valve, and a large part of oil enters the oil outlet channel from a gap between the main valve core and the installation cavity; when the pilot valve is restored, a small part of oil in the oil outlet channel flows back to the liquid inlet channel through the third one-way valve after entering the pilot valve from the second one-way valve, the main valve core is opened under the action of the pilot valve, and a large part of oil flows back to the oil outlet channel from a gap between the main valve core and the installation cavity.

According to the technical scheme, the pilot valve is complex in structure and poor in stability; on one hand, the valve ball is matched with the ejector rod to control the pressure in the pilot cavity, the upper end of the valve ball is matched with the ejector rod, the lower end of the valve ball is matched with the pilot return spring, the outer surface of the valve ball is a cambered surface, and the valve ball can roll in the pilot cavity, so that the valve ball is easy to slip when in contact with the ejector rod and the spring, and the connection is not stable enough; on the other hand, the pilot valve hole is axially provided with a direct-to-pilot return spring, when fluid in the main valve cavity enters the pilot cavity, the pressure of the fluid is opposite to the pilot return spring, so that unnecessary acting force can be caused on the pilot return spring, and the valve ball is acted on to shake.

Therefore, the unstable factors of the pilot valve in the technical scheme are more, and the instability of the pressure control in the pilot cavity is possibly caused to be higher, so that the regulation and control on the damping of the electromagnetic valve are also caused to be unstable; therefore, the pilot valve and the solenoid valve of the prior art have room for further improvement.

Disclosure of utility model

Aiming at the technical problems of complex structure and poor working stability of the electromagnetic valve and poor damping adjustment effect, in the first aspect, a flow adjustment mechanism is provided, which has simple structure and stable connection; in a second aspect, a solenoid valve for a shock absorber is provided, including the flow adjustment mechanism of the first aspect, the adjustment of the damping size of which is relatively stable, and the auxiliary effect for the shock absorber is good.

In a first aspect, the present application provides a flow regulating mechanism for a solenoid valve in a shock absorber, the flow regulating mechanism comprising a pilot valve spool, a pilot spring and a pilot valve seat, the pilot spring being located between the pilot valve spool and the pilot valve seat;

the pilot valve seat is provided with an oil inlet cavity which is communicated with two sides of the pilot valve seat;

The pilot valve core is provided with an adjusting column matched with the oil inlet cavity, and the adjusting column can axially move along with the pilot valve core so as to change the flow of the oil inlet cavity.

Compared with the prior art, the flow regulating mechanism controls the flow in the oil inlet cavity by controlling the axial movement of the pilot valve core relative to the pilot valve seat, has a relatively simple structure, is simple in movement to be controlled, and is relatively stable in flow regulation;

Specifically, an oil inlet cavity is formed in a pilot valve seat, an adjusting column is arranged on a pilot valve core and can axially move in the oil inlet cavity, and the volume of the adjusting column in the oil inlet cavity is changed to change the space capable of flowing fluid in the oil inlet cavity, so that the flow of the oil inlet cavity is adjusted; therefore, compared with the prior art, the flow regulating mechanism has simpler structure, smaller uncertain factors in regulating and controlling movement and more stable structure, and when the flow regulating mechanism is used for the electromagnetic valve in the shock absorber, the damping regulating and controlling capacity of the electromagnetic valve is more stable, and the effect is better.

In some alternative embodiments, the oil inlet cavity comprises an upper cavity and a lower cavity, wherein the upper cavity is communicated with the lower cavity;

The pilot valve seat comprises a first lug and a second lug, the first lug is positioned on one side, close to the pilot valve core, of the pilot valve seat, the second lug is positioned on one side, far away from the pilot valve core, of the pilot valve seat, the upper cavity is positioned on the first lug, and the lower cavity is positioned on the second lug.

In some alternative embodiments, the pilot valve seat is provided with an oil inlet and an oil outlet;

the oil inlet is communicated with the lower cavity, and the oil outlet is communicated with the upper cavity;

the oil outlet is positioned on the side wall of the first lug;

the oil inlet is positioned on the side wall or the bottom end of the second bump.

In some alternative embodiments, the upper chamber has an inner diameter of R1, the lower chamber has an inner diameter of R2, where R1> R2,

The adjusting column comprises a first part, wherein the outer diameter of the first part is R3, and R1> R3> R2 or R1> R2 is more than or equal to R3.

In some alternative embodiments, the first bump is provided with a matching hole; the adjustment post passes through the mating hole and is at least partially located in the upper chamber.

In some alternative embodiments, the adjustment post further includes a second portion that is at least partially positioned in the mating hole.

In some optional embodiments, the plurality of oil outlet holes are uniformly distributed along the circumference of the first bump.

In some alternative embodiments, the upper chamber has a length L1 in the axial direction and the adjustment post has a length L2 in the axial direction, wherein L2> L1.

In some alternative embodiments, the pilot spool includes a support seat, and the adjusting post is connected to a lower end of the support seat;

the upper end of the supporting seat is provided with an annular bulge.

The flow regulating mechanism has at least the following technical effects:

The flow is regulated and controlled by matching the oil inlet cavity with the regulating column, and the variable factors are small and the structure is stable in the process that the regulating column moves along with the pilot valve core;

The oil inlet hole is arranged on the side wall of the lower chamber of the oil inlet cavity, so that fluid in the lower end of the pilot valve seat is prevented from directly hedging the adjusting column, and stability of the adjusting column is facilitated;

Through setting up the external diameter of first portion to be greater than the external diameter of the lower cavity of advance oil cavity, can make when adjusting the post and move down, adjust the post and can not insert down in the cavity, and can block up down the cavity completely to increase the regulation and control scope of the flow of advance oil cavity.

In a second aspect, the present application also provides a solenoid valve for a shock absorber, including a flow regulating mechanism as described in any one of the embodiments above. The electromagnetic valve for the shock absorber has the advantages that the flow regulation and control of the flow regulating mechanism are stable, so that the opening regulation and control of the main valve core of the electromagnetic valve are stable, and the response speed is high.

Drawings

FIG. 1 is a schematic perspective view of a flow rate adjustment mechanism according to an embodiment of the present application;

FIG. 2 is a perspective exploded view of a flow regulating mechanism according to one embodiment of the present application;

FIG. 3 is a schematic cross-sectional view of a flow adjustment mechanism according to an embodiment of the present application;

Fig. 4 is a schematic perspective exploded view of a flow regulating mechanism according to an embodiment of the present application.

Reference numerals:

1. A pilot spool; 2. a pilot valve seat; 3. a pilot spring;

11. An adjusting column; 12. a support base; 13. an annular protrusion; 111. a first section; 112. a second section;

22. An oil inlet cavity; 221. an upper chamber; 222. a lower chamber; 223. an oil inlet hole; 224. an oil outlet hole; 225. a mating hole; 226. a first bump; 227. a second bump;

2122. and a communication port.

Detailed Description

In order to better understand the technical solutions of the present disclosure, the present disclosure will be described in detail, clearly and completely with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the present disclosure.

In the description of the present application, the description of the first and second is only for the purpose of distinguishing technical features, and should not be construed as indicating or implying relative importance or implying the number of technical features indicated or the precedence of the technical features indicated.

It will be appreciated by those skilled in the art that in the present disclosure, the terms "longitudinal," "transverse," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," etc. refer to an orientation or positional relationship based on that shown in the drawings, which is merely for convenience of description and to simplify the description, and do not indicate or imply that the apparatus or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore the above terms should not be construed as limiting the present application.

The application is described in further detail below with reference to the accompanying drawings, see for example figures 1 to 4.

In a first aspect, the present application provides a flow adjustment mechanism for a solenoid valve in a shock absorber, the flow adjustment mechanism being configured to adjust a damping magnitude of the shock absorber by varying a flow rate of the solenoid valve;

As shown in fig. 1 to 4, the flow rate adjustment mechanism includes a pilot valve element 1, a pilot spring 3, and a pilot valve seat 2, the pilot spring 3 being located between the pilot valve element 1 and the pilot valve seat 2, an upper end of the pilot spring 3 being in abutment with a lower end of the pilot valve element 1, a lower end of the pilot spring 3 being in abutment with an upper end of the pilot valve seat 2; when the upper end surface of the pilot valve core 1 receives downward acting force, the pilot valve core 1 moves downwards to squeeze and compress the pilot spring 3, so that the pilot spring 3 generates reaction force, and when the acting force applied to the pilot valve core 1 disappears, the pilot valve core 1 moves upwards to reset under the action of the prior missile spring 3, so that the pilot valve core 1 can axially move relative to the pilot valve seat 2; the pilot spring 3 has the functions of shock absorption and buffering, so that the pilot valve core 1 is pushed to move downwards more stably.

As shown in fig. 2 to 3, the pilot valve seat 2 is provided with an oil inlet cavity 22, and the oil inlet cavity 22 is communicated with two axial sides of the pilot valve seat 2, namely, fluid can flow from the lower end to the upper end of the pilot valve seat 2;

As shown in fig. 2 and 3, the pilot valve core 1 is provided with an adjusting column 11 matched with the oil inlet cavity 22, the adjusting column 11 is integrally columnar and is axially arranged at the lower end part of the pilot valve core 1, at least part of the adjusting column 11 is positioned in the oil inlet cavity 22, and the adjusting column 11 can axially move along with the pilot valve core 1 so as to change the volume of the adjusting column 11 in the oil inlet cavity 22, thereby changing the space in which the oil inlet cavity 22 can supply fluid to flow and then changing the flow of the oil inlet cavity 22.

Further, the adjusting column 11 may be a cylindrical column, a square column, a tapered column, or the like, and the specific shape thereof is not limited in the present application.

Further, as shown in fig. 2 to 4, the oil inlet chamber 22 includes an upper chamber 221 and a lower chamber 222, the upper chamber 221 communicating with the lower chamber 222; that is, after the fluid at the lower end of the pilot valve seat 2 enters the lower chamber 222, the fluid can enter the upper chamber 221, and flow to the upper end of the pilot valve seat 2 through the upper chamber 221; in the present embodiment, the pilot valve seat 2 includes a first protrusion 226 and a second protrusion 227, the first protrusion 226 is located on a side of the pilot valve seat 2 near the pilot valve spool 1, the second protrusion 227 is located on a side of the pilot valve seat 2 far from the pilot valve spool 1, the upper chamber 221 is located on the first protrusion 226, and the lower chamber 222 is located on the second protrusion 227; the second bump 227 protrudes downward in the axial direction, so that the volume of the oil inlet chamber 22 can be increased without increasing the volume of the rest of the pilot valve seat 2, and in addition, the extending depth of the lower chamber 222 can be increased, so that the fluid in the lower end of the pilot valve seat 2 can smoothly enter the oil inlet chamber 22, while the second bump 227 protrudes upward in the axial direction, and the extending height of the upper chamber 221 is increased, so that the fluid in the oil inlet chamber 22 can more smoothly flow to the upper end of the pilot valve seat 2.

Further, the adjusting column 11, the upper chamber 221 and the lower chamber 222 are substantially cylindrical, the central axes of the three are on the same straight line in the axial direction, the lower chamber 222 is connected to the lower end of the upper chamber 221, the top of the lower chamber 222 is provided with a communication port 2122 for communicating with the upper chamber 221, and the inner diameter of the communication port 2122 is the same as the inner diameter of the lower chamber 222.

Further, as shown in fig. 2 to 4, the pilot valve seat 2 is provided with an oil inlet 223 and an oil outlet 224, the oil inlet 223 is communicated with the lower chamber 222, the oil outlet 224 is communicated with the upper chamber 221, the oil inlet 223 is used for enabling the fluid at the lower end of the pilot valve seat 2 to flow into the lower chamber 222, and the oil outlet 224 is used for enabling the fluid in the oil inlet chamber 22 to flow out to the upper end of the pilot valve seat 2;

As shown in fig. 2 and fig. 4, the oil inlet 223 is located on a radial side wall of the second bump 227, so that fluid can not directly impact the adjusting column 11, and the pressure of the fluid is prevented from directly acting on the adjusting column 11 in the axial direction to affect the stability of the adjusting column 11, so that the stability of the adjusting column 11 is maintained, and the stability of flow regulation of the oil inlet cavity 22 is further ensured;

Or the oil inlet 223 is located at the axial bottom end of the second bump 227, so that the speed of the axial fluid entering the oil inlet cavity 22 can be increased, and the response speed of the first flow regulating mechanism can be improved.

As shown in fig. 2 and 4, the oil outlet 224 is located on a radial side wall of the first bump 226, so that the fluid flows upward and then flows sideways after entering the oil inlet cavity 22, so as to flow to the upper end of the pilot valve seat 2, and avoid the thrust generated by the adjusting column 11 when flowing out from the axial direction, so that the stability of the adjusting column 11 can be effectively ensured.

Further, the oil outlet 224 is plural, and the plurality of oil outlet 224 are uniformly distributed along the circumference of the first bump 226, so as to increase the oil outlet rate in the oil inlet cavity 22.

Further, the number of the oil inlet holes 223 is one, and the oil inlet holes 223 are one, so that the fluid can be ensured to have enough pressure to flow out of the oil inlet cavity 22 when entering the oil inlet cavity 22.

Further, as shown in fig. 2 to 4, the first bump 226 is provided with a mating hole 225, and the mating hole 225 is disposed at an axial top of the first bump 226; the adjustment post 11 passes through the fitting hole 225 and is at least partially located in the upper chamber 221, and the adjustment post 11 is inserted into the upper chamber 221 through the fitting hole 225 with a slight gap between the adjustment post 11 and the fitting hole 225 so that the adjustment post 11 can slide with respect to the fitting hole 225.

In another alternative embodiment of the present application, as shown in fig. 3, the upper chamber 221 and the lower chamber 222 are formed as a substantially cylindrical space, the inner diameter of the upper chamber 221 in the horizontal direction is R1, the inner diameter of the lower chamber 222 in the horizontal direction is R2, wherein R1> R2, i.e., the upper chamber 221 is wider in the horizontal direction than the lower chamber 222, so that fluid can flow from the lower chamber 222 to the upper chamber 221 at a faster speed; the adjusting column 11 comprises a first part 111, the first part 111 is positioned at the lower end of the adjusting column 11, the whole of the first part 111 is basically cylindrical, and the outer diameter of the first part 111 is R3;

When the first portion 111 moves downward, the adjusting column 11 is not inserted into the lower chamber 222, and can completely cover the port of the lower chamber 222 to block the lower chamber 222, and can completely prevent the oil inlet of the oil inlet chamber 22, so that the regulating range of the flow of the oil inlet chamber 22 is increased, and the regulating range of the opening range of the main valve element is also increased;

Or R1> R2 is larger than or equal to R3, that is, when the first portion 111 moves downwards, the adjusting column 11 can be inserted into the lower chamber 222, so that the flow control in the lower chamber 222 is finer, the accuracy of pilot valve assembly on pilot chamber pressure regulation is improved, the accuracy of opening regulation between the main valve spool and the main valve seat is improved, and compared with the embodiment, in the embodiment, the adjusting column 11 has higher adjustment accuracy on the oil inlet chamber 22.

Further, the first portion 111 may be cylindrical, square, or tapered; the end portions may be provided in a flat surface or in a tapered structure, and the shape of the first portion 111 is not limited in the present application.

In another alternative embodiment of the present application, the overall outer diameter of the adjusting post 11 is R3, where the size of R3 is the same as the outer diameter setting principle of the first portion 111 in the above embodiment, and details are not repeated here.

Further, the adjusting column 11 is further improved; as shown in fig. 3 and 4, the adjusting post 11 further includes a second portion 112, where the second portion 112 is matched with the matching hole 225, and the second portion 112 is at least partially located in the matching hole 225, so as to ensure that the second portion 112 does not deviate from the matching with the matching hole 225 when moving along with the pilot valve spool 1, so as to ensure that the spacing and guiding effects of the matching hole 225 on the second portion 112 are relatively stable.

Further, the second portion 112 is connected above the first portion 111, and the second portion 112 is substantially cylindrical as a whole; the outer diameter of the second portion 112 is R4, where R1> R4> R3, that is, the outer diameter of the second portion 112 is greater than the outer diameter of the first portion 111 but smaller than the inner diameter of the upper chamber 221, so that the second portion 112 does not block the upper chamber 221 when moving axially in the upper chamber 221, and the outer diameter of the second portion 112 is increased, so that the structural strength of the second portion 112 can be improved, and the structural stability and the connection stability of the column 11 can be adjusted. In this embodiment, the outer diameter of the second portion 112 is substantially the same as the inner diameter of the mating hole 225, and the outer diameter of the second portion 112 is slightly smaller than the inner diameter of the mating hole 225, so that the second portion 112 can slide up and down relative to the mating hole 225.

In another alternative embodiment of the present application, as shown in fig. 3, the length of the upper chamber 221 in the axial direction is L1, the length of the inner space of the upper chamber 221 is the length of the adjusting column 11 in the axial direction is L2, wherein L2> L1, when the adjusting column 11 is set to be longer than the length of the upper chamber 221, the adjusting column 11 can move downwards to be attached to the bottom of the upper chamber 221 when moving in the axial direction in the upper chamber 221, and the bottom of the upper chamber 221 is connected with the lower chamber 222, so that the adjusting column 11 can move downwards to the bottom to block the communication port 2122 of the lower chamber 222 to the upper chamber 221, so that fluid in the upper chamber 221 cannot enter the upper end of the pilot valve seat 2 through the upper chamber 221, so that the control of zero oil inlet of the oil inlet chamber 22 is realized, the regulating range of the flow of the oil inlet chamber 22 is increased, and the regulating range of the opening range of the main valve element is also increased.

In addition, after the length of the adjusting column 11 is greater than the length of the upper chamber 221, the lower end of the pilot valve core 1 can not be tightly attached to the top of the first bump 226, so that the pilot valve core 1 and the top of the upper chamber 221 can be effectively prevented from being blocked.

Further, the axial length of the second portion 112 is smaller than that of the upper chamber 221, so that the bottom of the second portion 112 can be prevented from touching the top of the second protrusion, and therefore, when the adjusting column 11 moves axially, the second portion 112 will not collide with the second protrusion, and noise is reduced.

In another alternative embodiment of the present application, as shown in fig. 3 and 4, the pilot valve core 1 includes a supporting seat 12, the upper end surface and the lower end surface of the supporting seat 12 are basically in a plane, the adjusting column 11 is connected to the lower end of the middle position of the supporting seat 12, and similarly, the pilot valve seat 2 also includes a supporting platform, the upper end and the lower end of the pilot spring 3 are respectively abutted to the supporting seat 12 and the supporting platform, so that the stability of the connection of the pilot spring 3 can be facilitated, and the plane makes the stress of each part of the pilot spring 3 relatively uniform, so that the axial movement of the pilot valve core 1 is relatively stable.

In this embodiment, the upper end surface of the supporting seat 12 is planar with the driving component, so that when the driving component acts on the supporting seat 12 of the pilot valve core 1, the driving component can be stably abutted with the pilot valve core 1, and compared with the abutting of the valve ball and the ejector rod (driving component) in the prior art, when the ejector rod (driving component) acts on the pilot valve core 1, the ejector rod (driving component) in this embodiment is not easy to slip, and the connection is stable, so that the pilot valve core 1 can stably move. It should be noted that how the driving assembly generates the driving force to drive the pilot spool 1 to move is the prior art, and the description is omitted herein.

Further, an annular protrusion 13 is provided at an outer edge of an upper end of the support base 12, the annular protrusion 13 protrudes upward in an axial direction, and the annular protrusion 13 is attached to a housing of the solenoid valve to perform a sealing function.

In the actual use process, as shown in fig. 3, the fluid at the lower end of the pilot valve seat 2 enters the lower chamber 222 through the oil inlet 223, then enters the upper chamber 221 through the lower chamber 222, and then flows out from the oil outlet 224 of the upper chamber 221 to the upper end of the pilot valve seat 2;

When the pilot valve core 1 moves downwards in the axial direction against the pilot spring 3, the adjusting column 11 also moves downwards along with the pilot valve core 1; as the first portion 111 moves down, the volume of the second portion 112 entering the upper chamber 221 increases, and when fluid in the lower chamber 222 flows from the communication port 2122 to the upper chamber 221, the fluid is gradually blocked by the lower end of the first portion 111, so that the flow rate of the lower chamber 222 to the upper chamber 221 is reduced, and then the flow rate of the oil inlet chamber 22 to the upper end of the pilot valve seat 2 is reduced;

The different positions to which the pilot spool 1 moves down represent different degrees of flow regulation by the flow regulating mechanism.

In a second aspect, the present application further provides a solenoid valve for a shock absorber, including a flow adjustment mechanism in any one of the embodiments described above, the solenoid valve further including a housing, an electric drive assembly, a main valve spool, a main valve seat, and a valve sleeve, the flow adjustment mechanism, the main valve spool, and the main valve seat being disposed within the valve sleeve, the flow adjustment mechanism being located axially above the main valve spool, the electric drive assembly being configured to generate a driving force acting on the flow adjustment mechanism, such that the flow adjustment mechanism is capable of adjusting an opening between the main valve spool and the main valve seat of the solenoid valve, thereby enabling adjustment of a damping size of the solenoid valve for the shock absorber; in this implementation, flow control mechanism's structure is comparatively simple, stable, and its flow regulation scope is great, response speed is fast to make the aperture regulation scope also great between main valve case and the main valve disk seat to the solenoid valve, and comparatively stable, thereby when making the solenoid valve be used for the shock absorber, can make the damping regulation scope of shock absorber big, response speed is fast, and is comparatively stable, the damping is effectual.

It should be noted that, in the case that the embodiments of the present application do not conflict with the solutions and the technical solutions can coexist, new embodiments may be arbitrarily combined.

The foregoing has outlined rather broadly the more detailed description of the application in order that the detailed description of the application that follows may be better understood, and in order that the present application may be better understood. It should be noted that it will be apparent to those skilled in the art that various modifications and adaptations of the application can be made without departing from the principles of the application and these modifications and adaptations are intended to be within the scope of the application as defined in the following claims.

Claims (10)

1. A flow regulating mechanism applied to a solenoid valve in a shock absorber, characterized in that the flow regulating mechanism comprises a pilot valve core (1), a pilot spring (3) and a pilot valve seat (2), wherein the pilot spring (3) is positioned between the pilot valve core (1) and the pilot valve seat (2);

an oil inlet cavity (22) is formed in the pilot valve seat (2), and the oil inlet cavity (22) is communicated with two sides of the pilot valve seat (2);

The pilot valve core (1) is provided with an adjusting column (11) matched with the oil inlet cavity (22), and the adjusting column (11) can axially move along with the pilot valve core (1) so as to change the flow of the oil inlet cavity (22).

2. The flow regulating mechanism of claim 1, wherein,

The oil inlet cavity (22) comprises an upper cavity (221) and a lower cavity (222), and the upper cavity (221) is communicated with the lower cavity (222);

The pilot valve seat (2) comprises a first lug (226) and a second lug (227), the first lug (226) is positioned on one side, close to the pilot valve core (1), of the pilot valve seat (2), the second lug (227) is positioned on one side, far away from the pilot valve core (1), of the pilot valve seat (2), the upper cavity (221) is positioned on the first lug (226), and the lower cavity (222) is positioned on the second lug (227).

3. The flow regulating mechanism according to claim 2, wherein,

An oil inlet (223) and an oil outlet (224) are arranged on the pilot valve seat (2);

The oil inlet hole (223) is communicated with the lower chamber (222), and the oil outlet hole (224) is communicated with the upper chamber (221);

The oil outlet (224) is positioned on the side wall of the first lug (226);

the oil inlet (223) is positioned on the side wall or the bottom end of the second bump (227).

4. The flow regulating mechanism according to claim 2, wherein,

The inner diameter of the upper chamber (221) is R1, the inner diameter of the lower chamber (222) is R2, wherein R1> R2,

The adjusting column (11) comprises a first part (111), wherein the outer diameter of the first part (111) is R3, and R1> R3> R2 or R1> R2 is more than or equal to R3.

5. The flow regulating mechanism according to claim 2, wherein,

The first lug (226) is provided with a matching hole (225); the adjustment post (11) passes through the mating hole (225) and is at least partially located in the upper chamber (221).

6. The flow regulating mechanism according to claim 4, wherein,

The adjustment post (11) further comprises a second portion (112), the second portion (112) being at least partially located in the mating hole (225).

7. A flow regulating mechanism according to claim 3, wherein,

The number of the oil outlet holes (224) is plural, and the plurality of the oil outlet holes (224) are uniformly distributed along the circumferential direction of the first protruding block (226).

8. A flow rate adjustment mechanism according to any one of claims 2 to 7, characterized in that,

The length of the upper chamber (221) in the axial direction is L1, and the length of the adjusting column (11) in the axial direction is L2, wherein L2> L1.

9. A flow rate adjustment mechanism according to any one of claims 1 to 7, characterized in that,

The pilot valve core (1) comprises a supporting seat (12), and the adjusting column (11) is connected to the lower end of the supporting seat (12);

The upper end of the supporting seat (12) is provided with an annular bulge (13).

10. A solenoid valve for a shock absorber, comprising a flow regulating mechanism as claimed in any one of claims 1 to 9.