CN220470528U - Damping control electromagnetic valve - Google Patents

Abstract

The utility model discloses a damping control electromagnetic valve, and relates to the technical field of valves; the hydraulic control valve comprises an outer valve body, a pilot valve seat, a pilot valve body, a driving part, a pilot spring and an elastic damping mechanism, wherein the elastic damping mechanism and the pilot valve seat are respectively arranged in cavities at two sides of the pilot valve body; wherein the action of the electromagnetic valve comprises: the first stage, under the action of electromagnetic force, the driving part drives the pilot valve body to overcome the reverse connection force transmitted to the driving part by the pilot spring, so that the pilot valve body moves a preset distance from a position far away from the pilot valve seat, and the elastic damping mechanism and the driving part have no interaction of force in the movement direction; and the second stage, in which the pilot valve body continues to move towards the direction approaching the pilot valve seat, the pilot spring and the elastic damping mechanism work in series to provide a refuting force or transmit the refuting force to the driving component. The present utility model can provide pilot relief control before pilot pressure control is performed.

Description

Damping control electromagnetic valve

Technical Field

The utility model relates to the technical field of valves, in particular to a damping control electromagnetic valve.

Background

The automobile shock absorber is arranged between the frame and the axle and is mainly used for inhibiting vibration and impact from the road surface when the spring rebounds after absorbing the vibration, so that the automobile is quickly restored to a normal running state, and the effects of shock resistance and shock absorption are achieved. The automobile shock absorber is provided with a damping valve, when the automobile is impacted by different road condition interferences and the speed of the automobile, more than 90% of energy is damped by the shock absorber when the vibration is transmitted through the wheels, and the shock absorber is a key part for shock resistance and shock absorption in an automobile suspension system. The external damping control electromagnetic valve for the shock absorber has high pressure, large flow and high control precision requirement. The existing damping control electromagnetic valve is driven by a magnetic field generated by an electromagnetic coil, a pilot valve is directly sealed with a pilot valve seat, a valve opening process always exists, and the use requirements of different working conditions of the shock absorber are difficult to meet.

Disclosure of Invention

Aiming at the technical problem that the existing damping control electromagnetic valve always has the valve opening process; the utility model provides a damping control electromagnetic valve, which can provide pilot overflow control before pilot pressure control, and ensure that the control precision of the damping control electromagnetic valve meets the use requirements of different working conditions of a shock absorber.

The utility model is realized by the following technical scheme:

the utility model provides a damping control electromagnetic valve, which comprises an outer valve body, a pilot valve seat, a pilot valve body, a driving part, a pilot spring and an elastic damping mechanism, wherein the elastic damping mechanism and the pilot valve seat are respectively arranged in cavities at two sides of the pilot valve body;

wherein the action of the electromagnetic valve comprises:

the first stage, under the action of electromagnetic force, the driving part drives the pilot valve body to overcome the reverse connection force transmitted to the driving part by the pilot spring, so that the pilot valve body moves a preset distance from a position far away from the pilot valve seat, and the elastic damping mechanism and the driving part have no interaction of force in the movement direction;

and the second stage, in which the pilot valve body continues to move towards the direction approaching the pilot valve seat, the pilot spring and the elastic damping mechanism work in series to provide a refuting force or transmit the refuting force to the driving component.

That is, the damping control electromagnetic valve provided by the utility model is characterized in that the outer valve body is internally provided with the pilot valve seat and the pilot valve body, the pilot spring is arranged between the pilot valve seat and the pilot valve body, the cavity of the pilot valve body, which is opposite to the driving part, is internally provided with the elastic damping mechanism, and the driving part can be abutted against the elastic damping mechanism.

In operation, the action of the driving part is divided into two phases, a first phase: the driving part moves towards the direction of the pilot valve body under the driving of electromagnetic force, the driving end of the driving part is firstly contacted with the pilot valve body to overcome the elastic force of the pilot spring to drive the pilot valve body to move, at the moment, the driving part and the elastic damping mechanism are still in a separated state, and the pilot valve body receives the thrust of the driving part towards the direction of the pilot valve seat, the reverse hydraulic force and the elastic force of the pilot spring. Along with the increase of electromagnetic force, the driving part continuously drives the pilot valve body to move towards the pilot valve seat, so that the driving part is in transmission connection with the elastic damping mechanism. In a state that the pushing force of the driving part acting on the elastic damping mechanism cannot overcome the resistance of the elastic damping mechanism, the driving part is limited by the elastic damping mechanism and cannot continuously push the pilot valve body to move towards the pilot valve seat. In this state, a normally open gap exists between the pilot valve body and the pilot valve seat, and the gap decreases as the driving force increases, so that the pressure of the main valve cavity is controlled by controlling the size of the gap, and the pilot overflow control is realized.

And a second stage: under the condition that the pushing force of the driving part acting on the elastic damping mechanism can overcome the resistance of the elastic damping mechanism, the driving part forces the elastic part of the elastic damping mechanism to deform, so that the pilot valve body is continuously pushed to move until the pilot valve body contacts with the pilot valve seat and is sealed. In this state, the pressure in the main valve chamber continuously rises, and when the pressure reaches a set threshold value, the pilot valve body is opened, the pressure oil is discharged, and the set threshold value increases with the increase of the driving force, so that the pressure of the main valve chamber is controlled by controlling the size of the threshold valve, and the pilot pressure control is realized.

In summary, the damping control electromagnetic valve provided by the utility model can provide pilot overflow control before pilot pressure control, so that the control accuracy of the damping control electromagnetic valve can meet the use requirements of different working conditions of the shock absorber.

In an alternative embodiment, a main valve cavity is arranged inside the outer valve body; the pilot valve seat is arranged in the outer valve body and is positioned at one side of the main valve cavity, which is far away from the inlet; the pilot valve body is arranged in the outer valve body, can axially move along the outer valve body and forms a pilot cavity with the pilot valve seat; the pilot spring is arranged between the pilot valve seat and the pilot valve body so as to facilitate the arrangement of all parts.

In an alternative embodiment, the side wall of the driving end of the driving part is provided with a pushing protrusion; the middle part of the elastic damping mechanism is provided with a through hole for the driving end of the driving part to pass through, and the pushing protrusion can be abutted against the elastic damping mechanism so as to ensure that when the driving part moves, the driving end of the elastic damping mechanism is only contacted with the pilot valve body to overcome the elasticity of the pilot spring to drive the pilot valve body to move, and a certain gap still exists between the pushing protrusion on the driving part and the elastic damping mechanism.

In an alternative embodiment, the elastic damping mechanism stiffness coefficient is greater than the stiffness coefficient of the pilot spring; in the initial state, the distance between the elastic damping mechanism and the driving part is larger than the preset distance, so that the driving part can be limited by the elastic damping mechanism and can not continuously push the pilot valve body to move towards the pilot valve seat under the condition that the pushing force of the driving part acting on the elastic damping mechanism can not overcome the resistance of the elastic damping mechanism.

In an alternative embodiment, the elastic damping mechanism is fixedly arranged in a cavity between the pilot valve body and the driving part, so that the installation of the elastic damping mechanism is facilitated.

In an alternative embodiment, the valve further comprises a housing, the outer valve body is at least partially inserted into the housing, and the elastic damping mechanism is arranged between the end of the outer valve body and the housing so as to fix the elastic damping mechanism.

In an alternative embodiment, a front yoke bush is arranged in one end of the outer shell inserted into the outer valve body, and the elastic damping mechanism is arranged on the side, opposite to the pilot valve body, of the front yoke bush.

In an alternative embodiment, the front yoke bush is fitted with a stop collar, and the elastic damping mechanism is pressed between the stop collar and the front yoke bush so as to fix the elastic damping mechanism.

In an alternative embodiment, a compensation ring is arranged between the limiting ring and the elastic damping mechanism, and the compensation ring is used for adjusting the distance between the limiting ring and the elastic damping mechanism. Because the dimensional tolerance of parts among different electromagnetic valves is different, the normally open clearance between the pilot valve body and the pilot valve seat of each electromagnetic valve is inconsistent, and therefore, the consistency of the normally open clearance among different electromagnetic valves can be kept at a higher level by selecting and matching a compensation ring with proper thickness for adjustment.

In an alternative embodiment, the number of compensating rings is greater than or equal to 1 to meet the adjustment requirement.

In an alternative embodiment, the end of the housing remote from the outer valve body is provided with a mounting cavity for mounting the solenoid coil, so as to facilitate mounting of the solenoid coil.

In an alternative embodiment, the driving end of the driving component is in a step shaft shape, and the pushing protrusion is a step part on the driving component, so that the processing of the driving component is facilitated, and meanwhile, the pressure equalizing property of the pushing force of the driving component on the elastic damping mechanism can be ensured.

In an alternative embodiment, the elastic damping mechanism is fixedly arranged outside one end of the driving part, which is far away from the pilot valve body, so as to avoid the influence of pressure oil on the action of the elastic damping mechanism.

In an alternative embodiment, a fixing component is sleeved outside one end of the driving component, which is far away from the pilot valve body, a through hole in the middle of the fixing component can be used for the pushing protrusion to pass through, and the elastic damping mechanism is fixed through the fixing component.

In an alternative embodiment, the pushing projection is a ring piece coaxially fixed to the driving member.

In an alternative embodiment, the elastic damping mechanism is a spring plate mechanism, so as to reduce the volume of the elastic damping mechanism.

In an alternative embodiment, the elastic damping mechanism comprises an annular sheet body and a plurality of elastic parts, and the elastic parts are uniformly distributed along the circumferential direction of the annular sheet body so as to avoid affecting the elasticity of the elastic damping mechanism when the elastic group damping mechanism is installed.

In an alternative embodiment, the outer valve body and the pilot valve seat are integrally formed to enhance reliability of the pilot valve.

In an alternative embodiment, the pilot valve body contacts and seals with the end face of the pilot valve seat at the end point of the second stage movement, so that the oil passage between the pilot valve seat and the pilot valve body is blocked.

In an alternative embodiment, during the first stage and the second stage, the driving part is in contact with the end face of the pilot valve body and is sealed, so that the flow passage between the pilot valve body and the driving part is blocked.

In an alternative embodiment, an annular flow passage is provided between the pilot valve seat and the pilot valve body to reduce the effect of uneven flow of pressure oil on the pilot spring.

In an optional embodiment, a middle through boss is arranged on one side, opposite to the pilot valve body, of the pilot valve seat, a plurality of through holes are formed in the side wall of the boss, one end of the pilot spring is sleeved outside the boss, so that the pilot spring is limited and supported through the boss, and displacement or deflection of the pilot spring under the action of pressure is avoided.

Compared with the prior art, the utility model has the following advantages and beneficial effects:

1. the damping control electromagnetic valve provided by the utility model is characterized in that the pilot valve seat and the pilot valve body are arranged in the outer valve body, the pilot spring is arranged between the pilot valve seat and the pilot valve body, the elastic damping mechanism is arranged in the cavity of one side of the pilot valve body, which is opposite to the driving part, and the pilot overflow control is realized in a state that the jacking force of the driving part acting on the elastic damping mechanism cannot overcome the resistance of the elastic damping mechanism, and the pilot pressure control is realized in a state that the jacking force of the driving part acting on the elastic damping mechanism can overcome the resistance of the elastic damping mechanism, so that the pilot overflow control can be provided before the pilot pressure control, and the control accuracy of the damping control electromagnetic valve can meet the use requirements of different working conditions of the shock absorber.

2. According to the damping control electromagnetic valve provided by the utility model, the elastic damping mechanism can apply driving resistance in the process that the driving part drives the pilot valve body, so that buffering is provided for the driving part, the impact of the driving part on the pilot valve body is reduced, the matching abrasion among parts is reduced, and the service life is prolonged.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered limiting the scope, and that other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

In the drawings:

FIG. 1 is a schematic diagram of a damping control solenoid valve according to an embodiment of the present utility model;

FIG. 2 is an enlarged schematic view of portion A of FIG. 1;

FIG. 3 is a schematic diagram of a damping control solenoid valve in a pilot overflow control mode according to an embodiment of the utility model;

FIG. 4 is a schematic diagram of a damping control solenoid valve according to an embodiment of the present utility model in a pilot pressure control mode;

FIG. 5 is a schematic view of a first embodiment of an elastic damping mechanism according to an embodiment of the present utility model;

FIG. 6 is a schematic diagram of a second embodiment of an elastic damping mechanism according to an embodiment of the present utility model;

FIG. 7 is a schematic view of a third embodiment of an elastic damping mechanism according to an embodiment of the present utility model;

FIG. 8 is a schematic view of a fourth embodiment of an elastic damping mechanism according to an embodiment of the present utility model;

FIG. 9 is a schematic diagram of a damping control solenoid valve according to another embodiment of the present utility model;

fig. 10 is an enlarged schematic view of a portion B of fig. 9.

In the drawings, the reference numerals and corresponding part names:

the hydraulic valve comprises a 1-pilot valve seat, a 1 a-boss, a 2-pilot spring, a 3-pilot valve body, a 4-limiting ring, a 5-compensating ring, a 6-elastic damping mechanism, a 6 a-annular sheet body, a 6 b-elastic part, a 7-front yoke bush, an 8-driving part, an 8 a-pushing protrusion, a 9-outer valve body, a 10-pilot cavity, a 11-main valve cavity, a 12-electromagnetic coil, a 13-fixing component, a 14-shell, a 14 a-mounting cavity and a 14 b-driving cavity.

Detailed Description

For the purposes of making the objects, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments. The components of the embodiments of the present application, which are generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.

In the description of the embodiments of the present application, the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the application is conventionally put in use, or the orientation or positional relationship that is conventionally understood by those skilled in the art, merely for convenience of describing the present application and simplifying the description, and is not indicative or implying that the apparatus or element in question must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present application.

In the description of the present utility model, the terms "disposed," "open," "mounted," "connected," and "connected" are to be construed broadly, unless otherwise specifically defined and limited. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

Example 1

With reference to fig. 1 and 9, the present embodiment provides a damping control electromagnetic valve, which includes an outer valve body 9, a pilot valve seat 1, a pilot valve body 3, a driving component 8, a pilot spring 2 and an elastic damping mechanism 6, wherein the elastic damping mechanism 6 and the pilot valve seat 1 are separately arranged in cavities at two sides of the pilot valve body 3;

wherein the action of the electromagnetic valve comprises:

the first stage, under the action of electromagnetic force, the driving part 8 drives the pilot valve body 3 to overcome the reverse connection force transferred to the driving part 8 by the pilot spring 2, so that the pilot valve body 3 moves a preset distance from a position far away from the pilot valve seat 1, and the elastic damping mechanism 6 and the driving part 8 have no interaction of force in the movement direction;

and the second stage, in which the pilot valve body 3 continues to move in a direction approaching the pilot valve seat 1, and the pilot spring 2 and the elastic damping mechanism 6 work in series to provide an anti-refuting force or transmit the anti-refuting force to the driving component 8.

Specifically, the main valve chamber 11 is arranged inside the outer valve body 9; the pilot valve seat 1 is arranged in the outer valve body 9 and is positioned at one side of the main valve cavity 11 away from an inlet; the pilot valve body 3 is arranged in the outer valve body 9, can axially move along the outer valve body 9, and forms a pilot cavity 10 with the pilot valve seat 1; the pilot spring 2 is arranged between the pilot valve seat 1 and the pilot valve body 3 so as to facilitate the arrangement of parts.

Meanwhile, a pushing protrusion 8a is arranged on the side wall of the driving end of the driving part 8; the middle part of the elastic damping mechanism 6 is provided with a through hole for the driving end of the driving part 8 to pass through, and the pushing protrusion 8a can be abutted against the elastic damping mechanism 6, so that when the driving part 8 moves, the driving end of the driving part is contacted with the pilot valve body 3 only to overcome the elasticity of the pilot spring 2 to drive the pilot valve body 3 to move, and a certain gap still exists between the pushing protrusion 8a on the driving part 8 and the elastic damping mechanism 6. The pushing projection 8a may be an annular structure, an arc projection, a latch, or the like provided outside the driving member 8.

Wherein the stiffness coefficient of the elastic damping mechanism 6 is larger than that of the pilot spring 2; in the initial state, the distance between the elastic damping mechanism 6 and the driving component 8 is greater than the preset distance, so as to ensure that the driving component 8 can be limited by the elastic damping mechanism 6 and can not continuously push the pilot valve body 3 to move towards the pilot valve seat 1 in a state that the pushing force of the driving component 8 acting on the elastic damping mechanism 6 can not overcome the resistance of the elastic damping mechanism 6.

Optionally, the outer valve body 9 and the pilot valve seat 1 are integrally formed, so as to improve the reliability of the pilot valve.

It can be understood that at the end point of the second stage movement of the pilot valve body 3, the pilot valve body 3 contacts and seals with the end surface of the pilot valve seat 1, so as to realize the interception of the oil passing channel between the pilot valve seat 1 and the pilot valve body 3.

Correspondingly, during the first stage and the second stage, the driving part 8 is in contact with and seals with the end face of the pilot valve body 3, so as to realize the interception of the flow passage between the pilot valve body 3 and the driving part 8.

On the basis, an annular flow passage is arranged between the pilot valve seat 1 and the pilot valve body 3, so that the influence of uneven flow of pressure oil on the pilot spring 2 is reduced.

Specifically, referring to fig. 2, a through boss 1a is disposed on a side of the pilot valve seat 1 opposite to the pilot valve body 3, and a plurality of through holes are disposed on a sidewall of the boss 1 a; one end of the pilot spring 2 is sleeved outside the boss 1a, so that the pilot spring 2 is limited and supported through the boss 1a, and displacement or deflection of the pilot spring 2 under the action of pressure is avoided.

With continued reference to fig. 1, in the damping control electromagnetic valve provided in this embodiment, during operation, the action of the driving member 8 during operation is divided into two phases, the first phase:

the driving part 8 moves towards the direction of the pilot valve body 3 under the driving of electromagnetic force, because the distance between the elastic damping mechanism 6 and the pilot valve body 3 is smaller than the distance from the pushing protrusion 8a on the driving part 8 to the end face of the driving end of the driving part 8, the driving end of the driving part 8 is firstly only contacted with the pilot valve body 3 so as to overcome the elastic force of the pilot spring 2 to drive the pilot valve body 3 to move, at the moment, a certain gap h still exists between the pushing protrusion 8a on the driving part 8 and the elastic damping mechanism 6, and the pilot valve body 3 is subjected to the pushing force of the driving part 8 towards the direction of the pilot valve seat 1, the reverse hydraulic force and the elastic force of the pilot spring 2. Along with the increase of electromagnetic force, the driving part 8 continues to drive the pilot valve body 3 to move towards the pilot valve seat 1, so that the pushing protrusion 8a is abutted against the elastic damping mechanism 6. Referring to fig. 3, in a state in which the urging force of the driving member 8 acting on the elastic damping mechanism 6 cannot overcome the resistance of the elastic damping mechanism 6, the driving member 8 is limited by the elastic damping mechanism 6, and the pilot valve body 3 cannot be pushed further in the direction of the pilot valve seat 1. In this state, a normally open gap H exists between the pilot valve body 3 and the pilot valve seat 1, and the normally open gap H decreases as the driving force increases, so that the pressure of the main valve chamber 11 is controlled by controlling the magnitude of the normally open gap H, to realize pilot relief control.

And a second stage: referring to fig. 4, when the pushing force of the driving component 8 acting on the elastic damping mechanism 6 can overcome the resistance of the elastic damping mechanism 6, the pushing protrusion 8a forces the elastic portion 6b of the elastic damping mechanism 6 to deform, so as to continuously push the pilot valve body 3 to move until the pilot valve body 3 contacts and seals with the pilot valve seat 1. In this state, the pressure in the main valve chamber 11 is continuously increased, and when the pressure reaches a set threshold value, the pilot valve body 3 is opened and the pressure oil is discharged, and the set threshold value is increased as the driving force is increased, so that the pressure of the main valve chamber 11 is controlled by controlling the magnitude of the threshold valve to realize pilot pressure control.

In summary, the damping control electromagnetic valve provided in this embodiment can provide pilot overflow control before pilot pressure control, so as to ensure that control accuracy of the damping control electromagnetic valve meets use requirements of different working conditions of the shock absorber.

It will be appreciated that different hydraulic regulation means may be achieved by the stiffness, arrangement height h of the elastic damping mechanism 6. The elastic damping mechanism 6 can apply driving resistance in the process of driving the pilot valve body 3 by the driving component 8, so that buffering is provided for the driving component 8, impact of the driving component 8 on the pilot valve body 3 is reduced, matching abrasion among parts is reduced, and service life is prolonged.

Example 2

In combination with fig. 1, this embodiment provides a damping control solenoid valve, and based on embodiment 1, the elastic damping mechanism 6 is fixedly disposed in a cavity between the pilot valve body 3 and the driving member 8, so as to facilitate installation of the elastic damping mechanism 6.

In particular, the damping control solenoid valve generally further comprises a housing 14, said outer valve body 9 being at least partially interposed within said housing 14, said elastic damping mechanism 6 being arranged between the end of said outer valve body 9 and said housing 14, so as to fix the elastic damping mechanism 6.

Referring to fig. 2, a front yoke bush 7 is disposed in one end of the outer housing 14 inserted into the outer valve body 9, and the elastic damping mechanism 6 is mounted on a side of the front yoke bush 7 opposite to the pilot valve body 3.

In this embodiment, the front yoke bush 7 is fitted with a stop collar 4, and the elastic damping mechanism 6 is pressed between the stop collar 4 and the front yoke bush 7 so as to fix the elastic damping mechanism 6. For the distance between the lower elastic damping mechanism 6 and the pilot valve body 3, the thickness of the limiting ring 4 can be controlled to adjust, for example, the limiting ring 4 is set to be different in gradient thickness, so that the limiting rings 4 with corresponding thicknesses can be selected according to machining errors, and compensation of the same height can be achieved.

The middle parts of the limiting ring 4 and the front yoke bush 7 can be penetrated by a driving part 8 and are usually coaxially arranged. The spring damper mechanism is not limited to the mechanism described in the present embodiment, and other modes of fixing the spring piece to the front yoke bush 7 are also included in the scope of the present utility model.

It will be appreciated that the end of the housing 14 remote from the outer valve body 9 is provided with a mounting cavity 14a, the mounting cavity 14a being for mounting the solenoid 12 to facilitate mounting of the solenoid 12.

The pushing protrusion 8a may be an annular structure, an arc protrusion, a latch, etc. disposed outside the driving component 8, in this embodiment, the driving end of the driving component 8 is in a stepped shaft shape, and the pushing protrusion 8a is a stepped portion on the driving component 8, so as to facilitate processing of the driving component 8, and meanwhile, ensure pressure equalizing performance of the pushing force of the driving component 8 acting on the elastic damping mechanism 6.

Referring to fig. 5, the elastic damping mechanism 6 in this embodiment is a spring plate mechanism, so as to reduce the volume of the elastic damping mechanism 6. The elastic damping mechanism 6 is not limited to the form and structure, and for example, a combination mechanism comprising a spring plate mechanism and all elastic mechanisms with the same function of providing the refuting force are included in the protection scope of the embodiment.

In detail, referring to fig. 5 to 8, the elastic damping mechanism 6 includes an annular sheet 6a and a plurality of elastic portions 6b, where the plurality of elastic portions 6b are uniformly distributed along the circumferential direction of the annular sheet 6a, so as to avoid affecting the elasticity of the elastic damping mechanism 6 when the elastic group damping mechanism is installed.

Example 3

With reference to fig. 2, this embodiment provides a damping control electromagnetic valve, based on the structure and principle described in embodiment 2, a compensation ring 5 is disposed between the limiting ring 4 and the elastic damping mechanism 6, and the compensation ring 5 is used for adjusting the distance between the limiting ring 4 and the elastic damping mechanism 6. Because the dimensional tolerance of parts among different electromagnetic valves is different, the normally open clearance between the pilot valve body 3 and the pilot valve seat 1 of each electromagnetic valve is inconsistent, and therefore, the consistency of the normally open clearance among different electromagnetic valves can be kept at a higher level by selecting and matching the compensation ring 5 with proper thickness for adjustment.

It should be noted that the middle part of the compensating ring 5 can be penetrated by the driving component 8, and the compensating ring 5 on each electromagnetic valve can be one compensating ring or a plurality of compensating rings 5 with the same thickness or different thicknesses. And the compensation ring 5 of the corresponding thickness is selected by measuring the corresponding real dimensions for each solenoid valve, so as to reduce the normally open gap H error (depending on the thickness of the minimum specification of the compensation ring 5) between the different solenoid valves. That is, the number of the compensating rings 5 is greater than or equal to 1 to satisfy the adjustment requirement. Of course, the limiting ring 4 can be provided with different thicknesses to replace the compensating ring 5, so as to achieve the same distance compensation effect.

In addition, it should be understood that the damping control solenoid valve provided in this embodiment is not limited to use in an automotive shock absorber, but may be used in other applications where it is desirable to use a component or fluid control system that is capable of adjusting the amount of damping.

Example 4

In combination with fig. 9, this embodiment provides a damping control electromagnetic valve, based on the structure and principle described in embodiment 2, except that the elastic damping mechanism 6 is fixedly disposed outside the end of the driving member 8 away from the pilot valve body 3, so as to avoid the influence of the pressure oil on the action of the elastic damping mechanism 6.

Referring to fig. 10, in this embodiment, a fixing component 13 is sleeved on one end of the driving component 8 away from the pilot valve body 3, a through hole in the middle of the fixing component 13 can allow the pushing protrusion 8a to pass through, and the elastic damping mechanism 6 is fixed by the fixing component 13.

That is, in the cavity bottom of the driving cavity 14b of the housing 14 where the driving member 8 is mounted, two ring pieces are fixed, and the elastic damping group mechanism 6 is clamped and fixed by the two ring pieces. The pushing protrusion 8a of the driving part 8 is a ring piece coaxially fixed on the driving part 8.

The foregoing description of the embodiments has been provided for the purpose of illustrating the general principles of the utility model, and is not meant to limit the scope of the utility model, but to limit the utility model to the particular embodiments, and any modifications, equivalents, improvements, etc. that fall within the spirit and principles of the utility model are intended to be included within the scope of the utility model.

Claims (22)

1. The damping control electromagnetic valve is characterized by comprising an outer valve body (9), a pilot valve seat (1), a pilot valve body (3), a driving part (8), a pilot spring (2) and an elastic damping mechanism (6), wherein the elastic damping mechanism (6) and the pilot valve seat (1) are respectively arranged in cavities at two sides of the pilot valve body (3);

wherein the action of the electromagnetic valve comprises:

the first stage, under the action of electromagnetic force, the driving part (8) drives the pilot valve body (3) to overcome the reverse connection force transmitted to the driving part (8) by the pilot spring (2) so as to enable the pilot valve body (3) to move a preset distance from a position far away from the pilot valve seat (1), and the elastic damping mechanism (6) and the driving part (8) have no interaction of force in the movement direction;

and the second stage, in which the pilot valve body (3) continues to move towards the direction approaching the pilot valve seat (1), the pilot spring (2) and the elastic damping mechanism (6) work in series to provide an anti-refuting force or transmit the anti-refuting force to the driving component (8).

2. Damping control solenoid valve according to claim 1, characterized in that said outer valve body (9) is internally provided with a main valve chamber (11);

the pilot valve seat (1) is arranged in the outer valve body (9) and is positioned at one side of the main valve cavity (11) far away from the inlet;

the pilot valve body (3) is arranged in the outer valve body (9), can axially move along the outer valve body (9), and encloses a pilot cavity (10) with the pilot valve seat (1);

the pilot spring (2) is arranged between the pilot valve seat (1) and the pilot valve body (3).

3. Damping control solenoid valve according to claim 1, characterised in that the drive end side wall of the drive part (8) is provided with a push protrusion (8 a);

the middle part of the elastic damping mechanism (6) is provided with a through hole for the driving end of the driving part (8) to pass through, and the pushing protrusion (8 a) can be abutted against the elastic damping mechanism (6).

4. A damping control solenoid valve according to claim 3, characterised in that the elastic damping mechanism (6) has a stiffness coefficient greater than that of the pilot spring (2);

in the initial state, the distance between the elastic damping mechanism (6) and the driving part (8) is larger than the preset distance.

5. Damping control solenoid valve according to claim 4, characterised in that said elastic damping means (6) are fixedly arranged in a cavity between said pilot valve body (3) and said driving member (8).

6. Damping control solenoid valve according to claim 5, characterised in that it further comprises a housing (14), said outer valve body (9) being at least partially interposed inside said housing (14), said elastic damping mechanism (6) being arranged between an end of said outer valve body (9) and said housing (14).

7. Damping control solenoid valve according to claim 6, characterised in that a front yoke bush (7) is provided in one end of the outer valve body (9) inserted into the outer housing (14), the elastic damping mechanism (6) being mounted on the side of the front yoke bush (7) facing the pilot valve body (3).

8. Damping control solenoid valve according to claim 7, characterised in that the front yoke bush (7) is fitted with a stop collar (4), the elastic damping means (6) being pressed between the stop collar (4) and the front yoke bush (7).

9. Damping control solenoid valve according to claim 8, characterised in that a compensating ring (5) is arranged between the limit ring (4) and the elastic damping mechanism (6), the compensating ring (5) being used for adjusting the distance between the limit ring (4) and the elastic damping mechanism (6).

10. Damping control solenoid valve according to claim 9, characterised in that the number of said compensation rings (5) is greater than or equal to 1.

11. Damping control solenoid valve according to claim 6, characterised in that the end of the housing (14) remote from the outer valve body (9) is provided with a mounting cavity (14 a), the mounting cavity (14 a) being intended for mounting a solenoid (12).

12. The damping control electromagnetic valve according to claim 5, characterized in that the driving end of the driving member (8) is stepped shaft-like, and the pushing protrusion (8 a) is a stepped portion on the driving member (8).

13. Damping control solenoid valve according to claim 4, characterised in that the elastic damping means (6) are fixedly arranged outside the end of the drive member (8) remote from the pilot valve body (3).

14. Damping control electromagnetic valve according to claim 13, characterized in that a fixing component (13) is sleeved outside one end of the driving component (8) far away from the pilot valve body (3), a through hole in the middle of the fixing component (13) can be used for the pushing protrusion (8 a) to pass through, and the elastic damping mechanism (6) is fixed through the fixing component (13).

15. Damping control solenoid valve according to claim 13, characterised in that said pushing projection (8 a) is a ring piece coaxially fixed to said driving member (8).

16. Damping control solenoid valve according to any one of claims 1 to 15 characterised in that said elastic damping means (6) are spring leaf means.

17. The damping control electromagnetic valve according to claim 16, characterized in that the elastic damping mechanism (6) includes an annular sheet body (6 a) and a plurality of elastic portions (6 b), the plurality of elastic portions (6 b) being uniformly distributed along the circumferential direction of the annular sheet body (6 a).

18. Damping control solenoid valve according to claim 1, characterised in that the outer valve body (9) and the pilot valve seat (1) are of unitary construction.

19. Damping control solenoid valve according to claim 1 or 2, characterized in that at the end of the second phase movement of the pilot valve body (3), the pilot valve body (3) is in contact with the end face of the pilot valve seat (1) and is sealed, achieving a interception of the oil passage between the pilot valve seat (1) and the pilot valve body (3).

20. Damping control solenoid valve according to claim 1 or 2, characterized in that during the first and second phases the drive member (8) is in end-face contact with the pilot valve body (3) and sealed, achieving a shut-off of the flow passage between the pilot valve body (3) and the drive member (8).

21. Damping control solenoid valve according to claim 2, characterized in that an annular flow channel is provided between the pilot valve seat (1) and the pilot valve body (3).

22. The damping control electromagnetic valve according to claim 21, characterized in that a middle through boss (1 a) is arranged on one side, opposite to the pilot valve body (3), of the pilot valve seat (1), a plurality of through holes are formed in the side wall of the boss (1 a), and one end of the pilot spring (2) is sleeved outside the boss (1 a).