CN116989087B

CN116989087B - Bidirectional pilot damping regulating valve and electromagnetic valve type shock absorber

Info

Publication number: CN116989087B
Application number: CN202311031470.XA
Authority: CN
Inventors: 吴柳杰; 叶港辉; 单东升; 陈赞; 张军晓; 任旺
Original assignee: Ningbo Saifu Automobile Brake Co ltd
Current assignee: Ningbo Saifu Automobile Brake Co ltd
Priority date: 2023-08-16
Filing date: 2023-08-16
Publication date: 2025-11-28
Anticipated expiration: 2043-08-16
Also published as: CN116989087A

Abstract

The application provides a bidirectional pilot damping regulating valve and a solenoid valve type shock absorber, and relates to the technical field of engineering hydraulic pressure. The bidirectional pilot damping regulating valve comprises a valve body, a main valve assembly, a pilot valve assembly and a driving assembly, wherein the valve body is provided with a containing cavity, a first valve port, a second valve port and a normally-open part which can be communicated with the containing cavity, the main valve assembly comprises a main valve core, the main valve core is arranged in the containing cavity and comprises a main body part and an annular part, the annular part is arranged on one side of the main body part, the main body part and the valve body enclose a first cavity and a second cavity, the main body part is provided with a third cavity, a first channel, a second channel and a third channel, the pilot valve assembly, the annular part and the main body part enclose a fourth cavity, and the driving assembly is used for driving the pilot valve assembly to move so as to regulate the volume of the fourth cavity. The bidirectional pilot damping regulating valve can effectively solve the problems in the prior art. The vibration damper using the bidirectional pilot damping regulating valve has larger vibration damping regulating range and higher upper pressure limit for vibration damping.

Description

Bidirectional pilot damping regulating valve and electromagnetic valve type shock absorber

Technical Field

The application relates to the technical field of engineering hydraulic pressure, in particular to a bidirectional pilot damping regulating valve and a solenoid valve type shock absorber.

Background

The motorcycle shock absorber is the most important core hardware of a motorcycle suspension system, and the shock generated in the running process of an automobile is relieved by damping energy generated by vibration through damping motion, so that the safety is improved. Meanwhile, the automobile shock absorber can provide higher comfort. The driver's requirements for comfort, stability and handling of the vehicle are increasing, which means that the automobile damper needs to be continuously updated and developed, thereby improving the technical level thereof. The semi-active suspension can adjust the damping characteristic of the suspension according to road conditions, can give consideration to running smoothness and control stability in a variable driving process and under severe road conditions, is close to the active suspension in control quality, has simpler structure and higher cost performance than the active suspension, and is a main stream of the use of the existing automobile suspension.

The hardware core of the semi-active suspension is an adjustable shock absorber, the adjustable shock absorber can be generally divided into three types, namely a stepping shock absorber, an electromagnetic valve shock absorber and a magnetic variable flow shock absorber, the stepping shock absorber can adjust damping force by pushing a needle valve to adjust the opening of a valve port through a stepping motor, stepless speed regulation can not be realized and response time is too slow, the magnetic variable flow shock absorber can adjust damping size through the characteristic of magnetorheological fluid, cost is too high, the electromagnetic valve shock absorber can adjust the opening of a valve through an electromagnetic valve, and further the damping size is linearly adjusted, and the magnetic variable flow shock absorber has the characteristics of being capable of realizing stepless speed regulation, being wider in damping adjustment range, short in response time, low in cost and the like, and is the main trend of the future middle-high-end automobile market. At present, a core component of the semi-active electronic shock absorber, which plays a role in continuously adjusting damping, is a damping adjusting valve, and the semi-active electronic shock absorber can be divided into a one-way damping adjusting valve and a two-way damping adjusting valve according to the oil flowing direction of the damping adjusting valve.

However, the existing bidirectional damping regulating valve has the problems of small pressure regulating range and small regulating pressure.

Disclosure of Invention

The application aims to provide a bidirectional pilot damping regulating valve, which can solve the problems of small pressure regulating range and small regulating pressure of the existing bidirectional damping regulating valve.

Another object of the present application is to provide a solenoid valve type shock absorber having all the characteristics of the above-mentioned two-way pilot damping control valve.

Embodiments of the present application are implemented as follows:

an embodiment of the present application provides a bidirectional pilot damping control valve, including:

The valve body is provided with a containing cavity, a first valve port, a second valve port and a normally-open part, wherein the first valve port, the second valve port and the normally-open part can be communicated with the containing cavity;

the main valve assembly comprises a main valve core, the main valve core is arranged in the accommodating cavity, the main valve core comprises a main body part and an annular part, the annular part is arranged on one side of the main body part, the main body part and the valve body enclose a first cavity and a second cavity, and the main body part is provided with a third cavity, a first channel, a second channel and a third channel;

the pilot valve assembly, the annular part and the main body part enclose a fourth chamber;

the driving assembly is used for driving the pilot valve assembly to move so as to adjust the volume of the fourth chamber;

The first valve port and the second valve port are kept normally open through the first chamber and the first channel, the second chamber and the third chamber are communicated through the second channel, the third chamber and the second valve port can be connected in an opening and closing mode, the third chamber and the fourth chamber are connected in an opening and closing mode through the pilot valve assembly, and the fourth chamber is communicated with the first valve port and the second valve port in a unidirectional mode through the third channel.

In addition, the bidirectional pilot damping regulating valve provided by the embodiment of the application can also have the following additional technical characteristics:

In an alternative embodiment of the present application, the bidirectional pilot damping adjustment valve includes a first state and a second state, the pilot valve assembly includes a pilot valve spool and a spring seat, the pilot valve spool being floatably disposed in the spring seat;

In the first state, damping oil flows out from the second valve port after passing through the first chamber from the first valve port, the damping oil sequentially passes through the second chamber and the third chamber from the normally-open part, and flows out from the second valve port after passing through the fourth chamber and the third channel after pushing away the pilot valve core, after the pilot valve core is pushed away, the main body part moves in the same direction with the pilot valve core and generates a gap with the valve body, and the damping oil can flow to the second valve port from the gap;

In the second state, damping oil flows out from the first valve port after passing through the first chamber from the second valve port, damping oil flows out from the first valve port after pushing away the pilot valve core from the third channel, passes through the fourth chamber and the third channel, and after pushing away the pilot valve core, the main body part and the pilot valve core move in the same direction and form a gap with the valve body, so that damping oil can flow to the first valve port from the gap.

In an alternative embodiment of the present application, the annular portion, the main body portion, and the spring seat enclose the fourth chamber, and the pilot spool is capable of opening and closing communication between the third chamber and the fourth chamber.

In an alternative embodiment of the present application, the driving assembly is an electromagnetic assembly, the electromagnetic assembly includes an electromagnet and an armature, the electromagnet is sleeved on the valve body, the armature is connected with the spring seat, and the armature is slidably disposed in the accommodating cavity.

In an alternative embodiment of the present application, the electromagnetic assembly further includes an adjusting screw, the adjusting screw is connected to the valve body, an end of the adjusting screw is connected to the spring seat, and a stroke of the pilot spool can be adjusted by pushing the spring seat.

In an alternative embodiment of the present application, the spring seat includes a first portion, a second portion, a third portion, a first spring, and a second spring;

The first part is sleeved at the first end of the pilot valve core, the first spring is sleeved at the pilot valve core and is positioned at one side of the first part, which is close to the main body part, the second spring is sleeved and compressed between the first part and the second part, the second spring is positioned at one side of the first part, which is far away from the first spring, and the third part is sleeved at the outer side of the first part and is used for driving the first part to move so as to adjust the length of the pilot valve core extending into the third chamber.

In an alternative embodiment of the present application, the valve body includes a housing and a main valve seat, the main valve seat is disposed at an end opening of the housing, the second valve port is formed at the main valve seat, and the main body portion abuts against the main valve seat.

In an alternative embodiment of the present application, the main body portion further includes a fourth channel, and the fourth chamber is in unidirectional communication with the first chamber and the first valve port through the fourth channel.

In an alternative embodiment of the present application, the bidirectional pilot damping control valve further includes a floating ball opening and closing assembly, where the floating ball opening and closing assembly includes an opening and closing ball, an opening and closing spring, and an opening and closing seat, where the opening and closing seat has a normal opening;

The normally-open part is provided with the floating ball opening and closing assembly, the opening and closing seat is connected with the valve body and seals the opening and closing ball, and the opening and closing ball and the valve body compress the opening and closing spring;

The main body part is provided with the floating ball opening and closing assembly, the opening and closing seat is connected to one side, far away from the pilot valve assembly, of the main body part and seals the opening and closing ball, and the opening and closing ball and the main body part compress the opening and closing spring.

The embodiment of the application provides a solenoid valve type shock absorber, which comprises a shock absorption cavity and any one of the bidirectional pilot damping regulating valves, wherein the bidirectional pilot damping regulating valve is arranged in the shock absorption cavity and divides the shock absorption cavity into a first shock absorption cavity and a second shock absorption cavity, the first valve port is communicated with the first shock absorption cavity, and the second valve port is communicated with the second shock absorption cavity.

The beneficial effects of the application are as follows:

the bidirectional pilot damping regulating valve forms secondary pressure control by arranging the main valve assembly and the pilot valve assembly, and realizes pressure difference and flow regulation in the operation process by combining the driving assembly, so that the problems in the prior art can be effectively solved. The vibration damper using the bidirectional pilot damping regulating valve has larger vibration damping regulating range and higher upper pressure limit for vibration damping.

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 as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of a bi-directional pilot damping control valve provided by an embodiment of the present application;

FIG. 2 is a cross-sectional view of FIG. 1;

FIG. 3 is an enlarged partial view of portion A of FIG. 2;

FIG. 4 is an enlarged partial view of portion B of FIG. 2;

FIG. 5 is an enlarged partial view of portion C of FIG. 2;

FIG. 6 is an exploded view of FIG. 1;

FIG. 7 is a schematic illustration of a main spool;

FIG. 8 is a schematic flow of damping fluid during a rebound stroke;

fig. 9 is a schematic flow diagram of damping oil during a compression stroke.

The icons are 100-two-way pilot damping control valve, 10-valve body, 11-first valve port, 12-second valve port, 13-normally open portion, 15-housing, 17-main valve seat, 20-main valve assembly, 21-main valve core, 211-main body portion, 2111-first chamber, 2112-second chamber, 2113-third chamber, 2114-fourth chamber, 2115-first channel, 2116-second channel, 2117-third channel, 2118-fourth channel, 212-annular portion, 30-pilot valve assembly, 31-valve core, 32-spring seat, 321-first portion, 322-second portion, 323-third portion, 324-first spring, 325-second spring, 40-drive assembly, 41-electromagnet, 42-armature, 43-power cord, 44-adjusting screw, 50-floating ball opening and closing assembly, 51-opening and closing ball, 52-opening and closing spring, 53-opening seat, 531-normally open, 60-sealing ring, 70-threaded washer.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present application more apparent, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the accompanying 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 of the present application. The components of the embodiments of the present application generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the application, as presented in the figures, is not intended to limit the scope of the application, as claimed, but is merely representative of selected embodiments of the application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.

It should be noted that like reference numerals and letters refer to like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.

In the description of the present application, it should be noted that the azimuth or positional relationship indicated by the terms "inner", "outer", etc. are based on the azimuth or positional relationship shown in the drawings, or the azimuth or positional relationship that the product is conventionally put in use, are merely for convenience of describing the present application and simplifying the description, and do not indicate or imply that the apparatus or elements to be referred to must have a specific azimuth, be configured and operated in a specific azimuth, and thus should not be construed as limiting the present application. Furthermore, the terms "first," "second," and the like, are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance.

In the description of the present application, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, integrally connected, mechanically connected, electrically connected, directly connected, indirectly connected through an intermediate medium, or in communication between two elements. The specific meaning of the above terms in the present application will be understood in specific cases by those of ordinary skill in the art.

Examples

Referring to fig. 1 to 7, an embodiment of the present application provides a bidirectional pilot damping control valve 100, including:

A valve body 10, the valve body 10 having a housing chamber, a first valve port 11, a second valve port 12, and a normally-open portion 13 that can communicate with the housing chamber (the normally-open portion 13 of the present embodiment is a normally-open orifice);

The main valve assembly 20, the main valve assembly 20 includes a main valve core 21, the main valve core 21 is disposed in the accommodating cavity, the main valve core 21 includes a main body portion 211 and an annular portion 212, the annular portion 212 is disposed on one side of the main body portion 211, the main body portion 211 and the valve body 10 enclose a first chamber 2111, a second chamber 2112, and the main body portion 211 is provided with a third chamber 2113, a first channel 2115, a second channel 2116 and a third channel 2117;

The pilot valve assembly 30, the annular portion 212 and the main body portion 211 enclose a fourth chamber 2114;

a driving assembly 40, the driving assembly 40 is used for driving the pilot valve assembly 30 to move so as to adjust the volume of the fourth chamber 2114;

Wherein, the first valve port 11 and the second valve port 12 are kept in normal communication through the first chamber 2111 and the first channel 2115, the second chamber 2112 and the third chamber 2113 are communicated through the second channel 2116, the third chamber 2113 is connected with the second valve port 12 in an openable and closable manner, the third chamber 2113 is connected with the fourth chamber 2114 in an openable and closable manner through the pilot valve assembly 30, and the fourth chamber 2114 is communicated with the first valve port 11 and the second valve port 12 in a unidirectional manner through the third channel 2117.

In brief, the pilot valve assembly 30 and the main valve assembly 20 provide two-stage control of the pressure control of the damper during the compression and rebound strokes, which can increase the adjustment range, and the adjustment process is smoother and more stable, thereby improving the damping effect. And because the driving component 40 can change the volume of the fourth chamber 2114, the flow of damping oil can be controlled, the continuous adjustment of pressure is realized, and the pressure difference is changed, so that the upper limit of the adjustment pressure is higher. For example, such as a typical damper regulator valve, the upper pressure limit may be 5, and in the unregulated configuration, the range of pressure regulation may be 1-3 or 2-4, with the range of regulation being 3 units wide. While the present application is configured such that the upper limit of 10 is possible by adjusting the volume of the fourth chamber 2114 by the drive assembly 40, the width of the adjustment may be up to 6 units, such as in the range of 1-6, or may be changed to be in the range of 4-10, due to the two-stage adjustment of the main valve assembly 20 and the pilot valve assembly 30. Effectively improves the prior art. Of course, the examples herein merely illustrate the improvement in effect, but the specific range parameters for the improvement may be designed and manufactured according to the actual requirements, and the numerical ranges of examples are not required.

The valve body 10 includes a housing 15 and a main valve seat 17, the main valve seat 17 is disposed at one end opening of the housing 15, the second valve port 12 is formed at the main valve seat 17, and the main body 211 is abutted against the main valve seat 17. When the whole bidirectional pilot damping control valve 100 does not work, the main body 211 is matched with the main valve seat 17, damping oil can only flow from the first channel 2115, and when the bidirectional pilot damping control valve 100 works, the main body 211 moves and a gap is formed between the main body 211 and the main valve seat 17, so that the damping oil can flow from the first channel 2115 and the gap together.

With continued reference to fig. 7, the main body 211 of the present application further includes a fourth channel 2118, and the fourth chamber 2114 is in unidirectional communication with the first chamber 2111 and the first valve port 11 through the fourth channel 2118. Both the fourth channel 2118 and the third channel 2117 above are illustrated with bold dashed lines. While the above second channel 2116 is indicated by a bold two-dot chain line, the second channel 2116 and the third and fourth channels 2117 and 2118 are not directly connected in a crossing manner, but are connected through the third and fourth chambers 2113 and 2114.

It will be appreciated that the fourth channel 2118 is similar in construction to the third channel 2117, and that a check valve plate is provided at the outlet of the channel. For example, in fig. 6, the outlet H of the third channel 2117 is blocked by a corresponding check valve plate S, and the check valve plate S is fixed to the outer side of the outlet H by a threaded washer 70 when assembled, and the threaded washer 70 is connected to an opening and closing seat 53 (which will be described later). Taking the view angle shown in fig. 7 as an example, the damping oil can only flow out from right to left. Of course, the third channel 2117 has another outlet G, and the outlet L of the fourth channel 2118 are similar in structure, and are all provided with a check valve plate (the check valve plate at the outlets G and L is hidden in the figure) at the outer side, so that damping oil can only overflow from the inner side to the outer side.

The bidirectional pilot damping control valve 100 further comprises a floating ball opening and closing assembly 50, wherein the floating ball opening and closing assembly 50 comprises an opening and closing ball 51, an opening and closing spring 52 and an opening and closing seat 53, and the opening and closing seat 53 is provided with a normal opening 531;

Wherein, the normally-open part 13 is provided with a floating ball opening and closing component 50, an opening and closing seat 53 is connected with the valve body 10 and seals the opening and closing ball 51, and the opening and closing ball 51 and the valve body 10 compress an opening and closing spring 52;

Wherein, the main body 211 is provided with a floating ball opening and closing assembly 50, the opening and closing seat 53 is connected to one side of the main body 211 far away from the pilot valve assembly 30 and seals the opening and closing ball 51, and the opening and closing ball 51 and the main body 211 compress the opening and closing spring 52.

The floating ball opening and closing assembly 50 is only basically the same in component types, and the floating ball opening and closing assembly 50 used in the normal portion 13 and the main body portion 211 is not limited to have the same specification and shape and structure, and may be designed according to the installation position and the opening and closing effect to be achieved.

Further, the normally open port 531 of the opening and closing seat 53 is convenient for the vibration damping oil to circulate, and due to the blocking of the opening and closing ball 51, the vibration damping oil can circulate only from the normally open channel of the opening and closing seat 53 to the direction of the opening and closing ball 51, but not in the opposite direction, for example, in the third chamber 2113, the vibration damping oil can circulate only from left to right.

Based on the bidirectional pilot damping control valve 100, an embodiment of the present application provides a solenoid valve type shock absorber, which includes a damping cavity and a bidirectional pilot damping control valve 100, wherein the bidirectional pilot damping control valve 100 is disposed in the damping cavity and divides the damping cavity into a first damping cavity and a second damping cavity, the first valve port 11 is communicated with the first damping cavity, and the second valve port 12 is communicated with the second damping cavity.

The first damping chamber and the second damping chamber may refer to a rebound chamber and a compression chamber of a general shock absorber.

The pilot valve assembly 30 of the present application includes a pilot valve element 31 and a spring seat 32, and the pilot valve element 31 is floatably provided in the spring seat 32. Specifically, the fourth chamber 2114 of the present embodiment is surrounded by the annular portion 212, the main body portion 211, and the spring seat 32, and the pilot spool 31 can open and close the communication between the third chamber 2113 and the fourth chamber 2114. It will be appreciated that when the dynamic seal between the body portion 211 and the valve body 10 is reliable, the annular portion 212 may also be replaced by the inner wall of the valve body 10, i.e. the annular portion 212 may be removed depending on the sealing situation. It will be appreciated that, in this case, the part of the inner wall of the valve body 10 is substantially identical to the annular portion 212 described above, and therefore, the annular portion 212 is not limited to being provided only on the main valve element 21, and even if the part of the inner wall of the valve body 10 replaces the annular portion 212, it may be regarded as a part of the main valve element 21, and only provided separately.

Referring to fig. 1 and 5, the driving assembly 40 of the present embodiment is an electromagnetic assembly, the electromagnetic assembly includes an electromagnet 41 and an armature 42, the electromagnet 41 is sleeved on the valve body 10, the armature 42 is connected with the spring seat 32 (specifically, connected with a third portion 323 set forth below), and the armature 42 is slidably disposed in the accommodating cavity. The power cord 43 of the electromagnet 41 is connected to the housing 15.

The electromagnetic assembly further comprises an adjusting screw 44, the adjusting screw 44 is connected in the valve body 10, the end portion of the adjusting screw 44 is connected to the spring seat 32, and the stroke of the pilot valve core 31 can be adjusted by pushing the spring seat 32.

In the present embodiment, the spring seat 32 includes a first portion 321, a second portion 322, a third portion 323, a first spring 324, and a second spring 325;

The first portion 321 is sleeved at the first end of the pilot valve core 31, the first spring 324 is sleeved at the pilot valve core 31 and is positioned at one side of the first portion 321 close to the main body portion 211, the second spring 325 is sleeved and compressed between the first portion 321 and the second portion 322, the second spring 325 is positioned at one side of the first portion 321 far away from the first spring 324, and the third portion 323 is sleeved at the outer side of the first portion 321 and is used for driving the first portion 321 to move so as to adjust the length of the pilot valve core 31 extending into the third chamber 2113. The adjusting screw 44 directly abuts against the second portion 322, the position of the second portion 322 in the axial direction of the adjusting screw 44 can be changed by screwing the adjusting screw 44, the axial position of the first portion 321 can be changed by the acting force conduction of the second spring 325, and accordingly the size of the fourth cavity can be changed, the flow adjusting function is achieved, and the pressure adjusting range is changed. In addition, as the position of the first portion 321 is changed, the compression amount of the first spring 324 is changed, so that the difficulty of the damping oil entering the fourth chamber 2114 from the third chamber 2113 is changed, and the transmission speed and pressure of the damping oil can be changed, so that the pressure adjustment and flow adjustment in the damping process are more controllable, and the dynamic balance in the running process is easier to realize.

The principle of this embodiment is:

Referring to fig. 8 and 9, the bidirectional pilot damping control valve 100 of the present application includes a first state and a second state;

In the first state, damping oil flows out from the second valve port 12 after passing through the first chamber 2111 from the first valve port 11, passes through the second chamber 2112 and the third chamber 2113 from the normally-open portion 13 in sequence, and flows out from the second valve port 12 after passing through the fourth chamber 2114 and the third channel 2117 after pushing away the pilot valve element 31, and after pushing away the pilot valve element 31, the main body portion 211 moves in the same direction as the pilot valve element 31 and generates a gap with the valve body 10, so that the damping oil can flow into the second valve port 12 from the gap;

In the second state, the damping oil flows out of the first valve port 11 through the first chamber 2111 from the second valve port 12, pushes the pilot valve element 31 from the third passage 2117, flows out of the first valve port 11 through the fourth chamber 2114 and the third passage 2117, and after the pilot valve element 31 is pushed, the main body 211 moves in the same direction as the pilot valve element 31 and forms a gap with the valve body 10, so that the damping oil can flow into the first valve port 11 from the gap.

Specifically, the first state corresponds to a restoring stroke state of the shock absorber where the bidirectional pilot damping control valve 100 is located, and the second state corresponds to a compression stroke state. A seal ring 60 is provided outside the valve body 10 to prevent leakage of the vibration damping oil.

In detail, when the electromagnetic valve type shock absorber is in the recovery stroke, the bidirectional pilot damping control valve 100 enters the first state, the first valve port 11 serves as an inlet of the recovery stroke, and when the damping oil enters the first chamber 2111, the damping oil only flows from the first channel 2115 to the second valve port 12 at this time due to the check valve plates at the outlets of the third channel 2117 and the fourth channel 2118 on the main valve element 21, and a primary pressure control (abbreviated as a primary valve stage) is formed between the main valve element 21 and the main valve seat 17. In the restoring stroke, the damping oil simultaneously squeezes the opening and closing ball 51 from the position of the normally-open portion 13 and enters the second chamber 2112, the squeezing and opening of the closing ball 51 needs to overcome the acting force of the opening and closing spring 52 to generate a certain damping, and further after entering the third chamber 2113 through the second channel 2116, the damping oil needs to further overcome the acting force of the first spring 324 and the second spring 325 to push the pilot valve core 31 open, and a certain damping is generated in the process to form a second-stage pressure control (abbreviated as pilot stage). The damping fluid then enters the fourth chamber 2114 from the third chamber 2113 and pushes the check valve plate at the outlet away from the third passage 2117 and out to the second port 12. When the pilot valve core 31 moves, the stress of the main valve core 21 changes, so that the pilot valve core 31 can move in the same direction, and a gap is formed between the main valve core 21 and the main valve seat 17, so that damping oil can flow to the second valve port 12 from the gap, the flow of the main valve stage is increased, and the upper limit of pressure control is improved.

In detail, when the electromagnetic valve type shock absorber is in the compression stroke, due to the existence of the one-way valve plate S, part of damping oil flows from the second valve port 12 to the first valve port 11 through the first channel 2115, so that main valve stage pressure control is formed. The other part of oil liquid enters the third chamber 2113 after overcoming the opening and closing spring 52 and pushes the pilot stage to enter the fourth chamber 2114 from Kong Tuiji of the opening and closing seat 53 arranged on the main valve core 21 to form pilot stage pressure control. Similarly, when the pilot valve element 31 is pushed open, the main valve element 21 moves in the same direction to form a gap with the main valve seat 17, so that the flow rate from the second valve port 12 directly to the first valve port 11 is increased, and the upper pressure control limit of the main valve stage is raised.

It should be noted that, when the bidirectional pilot damping control valve 100 is operated, the pilot spool 31 moves for a certain displacement when the inflow flow is constant, and then the respective spring force, hydraulic force, friction force, etc. are in a balanced state, and the hydraulic force and hydraulic force received by the left and right main spools 21 are also in a balanced state.

It should be noted that the difference between the displacement of the pilot valve and the displacement of the main spool 21 is the pilot stage flow area value, and therefore the displacement of the main spool 21 is also indirectly controlled by the spring force.

When the power line 43 supplies power to the electromagnet 41, the armature 42 receives electromagnetic force to the right, and the armature 42 is connected with the pilot valve core 31, so that the pilot valve core 31 also receives electromagnetic force, the stress relationship changes due to the addition of electromagnetic force, and the set pressure of the damping regulating valve also changes, so that the function of regulating the set pressure of the bidirectional pilot damping regulating valve 100 to regulate the damping force of the shock absorber can be achieved.

In the process of using the bidirectional damping regulating valve, a secondary pressure control device can be formed through the main valve assembly 20 and the pilot valve assembly 30 in the recovery and compression strokes, and in the process of performing pressure control, the pilot valve assembly 30 can be driven by an electromagnetic assembly to move in the valve body 10, so that the conduction flow of the third chamber 2113 and the fourth chamber 2114 is controlled, the pressure of the fourth chamber 2114 is continuously regulated, the effect of pressure difference and flow regulation is achieved, dynamic balance is realized in the process of operation, and the effects of improving the pressure regulating range and setting the pressure property in the two strokes can be achieved.

Furthermore, since the main spool 21 is indirectly acted upon by the spring force, it has no direct spring resistance itself, so that after the pilot spool 31 moves, it can move more rapidly with the pilot spool 31, creating a gap, the damping of which adjusts correspondingly faster. And one side of the spring is more easily damaged than the main valve core 21, the service life is not long, the service life of the whole regulating valve is influenced, and the problem of reducing the service life of the main valve assembly 20 due to the short service life of the spring can be avoided by removing the directly acting spring outside the main valve core 21.

In summary, the bidirectional pilot damping control valve 100 of the present application forms the secondary pressure control by setting the main valve assembly 20 and the pilot valve assembly 30, and combines the driving assembly 40 to realize the pressure difference and the flow regulation in the operation process, so as to effectively solve the problems in the prior art. The shock absorber using the bidirectional pilot damping control valve 100 has a larger damping control range and a higher upper pressure limit for damping.

The above description is only of the preferred embodiments of the present application and is not intended to limit the present application, but various modifications and variations can be made to the present application by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. A bi-directional pilot damping control valve, comprising:

The first valve port and the second valve port are kept normally open through the first chamber and the first channel, the second chamber and the third chamber are communicated through the second channel, the third chamber is connected with the second valve port in an opening and closing manner, the third chamber is connected with the fourth chamber through the pilot valve assembly in an opening and closing manner, and the fourth chamber is communicated with the first valve port and the second valve port in a unidirectional manner through the third channel;

the bidirectional pilot damping regulating valve comprises a first state and a second state, the pilot valve assembly comprises a pilot valve core and a spring seat, and the pilot valve core is floatingly arranged on the spring seat;

2. The bi-directional pilot damping control valve of claim 1, wherein the annular portion, the body portion, and the spring seat enclose the fourth chamber, and the pilot spool is capable of opening and closing communication between the third chamber and the fourth chamber.

3. The bi-directional pilot damping control valve of claim 1 wherein the drive assembly is an electromagnetic assembly comprising an electromagnet and an armature, the electromagnet being nested within the valve body, the armature being connected to the spring seat, the armature being slidably disposed within the receiving chamber.

4. A two-way pilot damping control valve according to claim 3, wherein the electromagnetic assembly further comprises an adjustment screw connected within the valve body, an end of the adjustment screw being connected to the spring seat and being capable of adjusting the stroke of the pilot spool by pushing the spring seat.

5. The bi-directional pilot damping adjustment valve according to any one of claims 1-4, wherein the spring seat comprises a first portion, a second portion, a third portion, a first spring, and a second spring;

6.A two-way pilot damping control valve according to claim 1, wherein the valve body comprises a housing and a main valve seat provided at an end opening of the housing, the second valve port is formed at the main valve seat, and the main body portion abuts against the main valve seat.

7. A two-way pilot damper regulator valve according to claim 1, wherein the body portion further comprises a fourth passage through which the fourth chamber is in one-way communication with the first chamber, the first valve port.

8. The bi-directional pilot damping control valve of claim 1 further comprising a float on-off assembly comprising an on-off ball, an on-off spring, and an on-off seat, the on-off seat having a constant opening;

9. A solenoid valve type shock absorber, which is characterized by comprising a shock absorption cavity and the bidirectional pilot damping regulating valve as claimed in any one of claims 1-8, wherein the bidirectional pilot damping regulating valve is arranged in the shock absorption cavity and divides the shock absorption cavity into a first shock absorption cavity and a second shock absorption cavity, the first valve port is communicated with the first shock absorption cavity, and the second valve port is communicated with the second shock absorption cavity.