CN212868068U

CN212868068U - Electromagnetic valve and electrohydraulic control system

Info

Publication number: CN212868068U
Application number: CN202021785392.4U
Authority: CN
Inventors: 史映红
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-08-24
Filing date: 2020-08-24
Publication date: 2021-04-02
Anticipated expiration: 2030-08-24

Abstract

The utility model discloses a solenoid valve and electrohydraulic control system, this solenoid valve includes: a valve body having a valve cavity formed therein; the valve core is arranged in the valve cavity and can slide along the valve cavity; the electromagnetic action component is arranged at the end part of each valve body, a valve plate is formed at the joint of each electromagnetic action component and the valve body, and the electromagnetic action component drives the valve core to move towards the corresponding valve plate by virtue of electromagnetic attraction; wherein: the end part of the valve core is provided with a buffer mechanism, and the buffer mechanism is used for relieving the impact generated in the process that the valve plate stops the valve core.

Description

Electromagnetic valve and electrohydraulic control system

Technical Field

The utility model relates to a hydraulic control technical field especially relates to a solenoid valve and electrohydraulic control system among electrohydraulic control system.

Background

As is known, a hydraulic control system typically includes a power element such as a pump, a control element such as a valve, an actuator such as a cylinder or a motor, and a conduit connecting these elements. When these elements are controlled using power electronics, the hydraulic control system is also referred to as an electro-hydraulic control system.

As an indispensable element in an electro-hydraulic control system, a solenoid valve having an effect of controlling a flow direction or a flow rate of a hydraulic medium generally includes a valve body, a spool disposed in the valve body, and an electromagnetically acting member disposed at an end portion of the valve body to drive the spool to move by a magnetic force, the electromagnetically acting member having a valve plate for limiting the moved spool, specifically, the spool is driven (electromagnetically attracted) by the electromagnetically acting member to move toward the valve plate, and when an end portion of the spool is stopped by the valve plate, the spool stops moving.

The above-mentioned solenoid valve in the prior art has the following defects:

the electromagnetism effect part circular telegram back carries out magnetic attraction to the case, and then makes the case towards valve plate accelerated motion, then is backstopped by the valve plate, and the case is by the backstop in-process of valve plate, produces great impact between case and the valve plate, and this impact can make whole solenoid valve produce great noise, and produces the influence to the life of solenoid valve, especially case and/or valve plate.

SUMMERY OF THE UTILITY MODEL

To the above-mentioned technical problem that exists among the prior art, the embodiment of the utility model provides a solenoid valve.

For solving the technical problem, the embodiment of the utility model adopts the following technical scheme:

a solenoid valve, comprising:

a valve body having a valve cavity formed therein;

the valve core is arranged in the valve cavity and can slide along the valve cavity;

the electromagnetic action component is arranged at the end part of each valve body, a valve plate is formed at the joint of each electromagnetic action component and the valve body, and the electromagnetic action component drives the valve core to move towards the corresponding valve plate by virtue of electromagnetic attraction; wherein:

the end part of the valve core is provided with a buffer mechanism, and the buffer mechanism is used for relieving the impact generated in the process that the valve plate stops the valve core.

Preferably, the buffer mechanism includes:

a buffer chamber extending axially inward from an end face of the valve spool;

the sliding plug is arranged in the buffer cavity and can slide along the buffer cavity;

the sleeve check ring is arranged at the end part of the buffer cavity to limit the sliding plug from falling out of the buffer cavity;

the first spring is arranged in the buffer cavity and used for pushing the sliding plug;

a buffer rod connected to the sliding plug and extending out of an end of the spool; the valve plate is used for stopping the buffer rod.

Preferably, an orifice is opened at an end of the valve body, and the orifice penetrates the cushion chamber.

Preferably, the end of the buffer rod is provided with a buffer pad.

Preferably, the cushion pad is made of a nylon material.

Preferably, a sleeve body is arranged at the end part of each valve body, a stop ring opposite to the sleeve body is sleeved at the step of the valve core, and a second spring is arranged between the stop ring and the sleeve body;

the elastic coefficient of the first spring is greater than that of the second spring.

Preferably, the valve plate extends into the housing body.

Preferably, the electromagnetic valve is an electromagnetic directional valve.

The utility model also discloses an electricity liquid control system, including foretell solenoid valve.

Compared with the prior art, the utility model discloses a solenoid valve and electricity liquid control system's beneficial effect is:

1. impact between the valve core and the valve plate can be greatly buffered by adding the buffer mechanism.

2. The first spring can play a role in relieving impact between the valve core and the valve plate.

3. The throttling hole enables the hydraulic medium to have a certain buffering effect by limiting the flow of the hydraulic medium flowing out of the buffering cavity, and forms a softer buffering effect on the valve core and the valve plate.

4. The elastic coefficient of the first spring is larger than that of the second spring, so that the second spring is used for resetting the valve core to the maximum extent.

The summary of various implementations or examples of the technology described in this disclosure is not a comprehensive disclosure of the full scope or all features of the disclosed technology.

Drawings

In the drawings, which are not necessarily drawn to scale, like reference numerals may describe similar components in different views. Like reference numerals having letter suffixes or different letter suffixes may represent different instances of similar components. The drawings illustrate various embodiments, by way of example and not by way of limitation, and together with the description and claims, serve to explain the embodiments of the invention. The same reference numbers will be used throughout the drawings to refer to the same or like parts, where appropriate. Such embodiments are illustrative, and are not intended to be exhaustive or exclusive embodiments of the present apparatus or method.

Fig. 1 is a schematic view of an internal structure of a solenoid valve according to an embodiment of the present invention.

Fig. 2 is an enlarged view of a portion a of fig. 1 (the electromagnetically acting component is in a power-off state).

Fig. 3 is an enlarged view of a portion a of fig. 1 (the electromagnetically acting member is in an energized state, and the damping rod is just in contact with the valve plate).

Fig. 4 is an enlarged view of a portion a of fig. 1 (the electromagnetically acting member is in an energized state, and the buffer rod is in a retracted state).

Reference numerals:

10-a valve body; 20-a valve core; 30-an electromagnetically acting component; 31-a valve plate; 40-a buffer mechanism; 41-a buffer chamber; 42-a sliding plug; 43-a buffer rod; 44-a cushion pad; 45-a first spring; 46-mechanically using a retainer ring; 51-a sleeve body; 52-a stop ring; 53-second spring.

Detailed Description

Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by those of ordinary skill in the art to which the invention belongs. The use of "first," "second," and similar terms in the description herein do not denote any order, quantity, or importance, but rather the terms are used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that the element or item listed before the word covers the element or item listed after the word and its equivalents, but does not exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships may also be changed accordingly.

To maintain the following description of the embodiments of the present invention clear and concise, detailed descriptions of well-known functions and components may be omitted.

The embodiment of the utility model discloses an electromagnetic valve, preferably, this electromagnetic valve is for being applied to the solenoid directional valve that is used for switching the electric liquid control system who removes vehicle driving mode.

As shown in fig. 1 and 2, the solenoid valve includes: a valve body 10, a valve body 20, an electromagnetic operation member 30, and a damper mechanism 40.

The valve body 10 is provided with a valve cavity, the valve core 20 is arranged in the valve cavity and can slide along the valve cavity, the valve core 20 can change the flow direction of a hydraulic medium passing through the valve cavity by sliding, that is, the valve core 20 can play a role in reversing by sliding.

The two electromagnetic action components 30 are respectively arranged at two sides of the valve body 10 in the axial direction, an electromagnetic coil is wound inside the electromagnetic action component 30, and when the electromagnetic coil is electrified, the electromagnetic action component 30 generates magnetic attraction force, so that the electromagnetic action component 30 can attract the valve core 20 to move. Each electromagnetic action component 30 is provided with a valve plate 31, the valve plate 31 is positioned at the joint of the electromagnetic action component 30 and the valve body 10, and the valve plate 31 is used for limiting the valve core 20 through stopping the valve core 20.

Preferably, a sleeve body 51 is provided at each end of the valve body 10, a stop ring 52 is sleeved at a step of the valve spool 20, the stop ring 52 is opposite to the sleeve body 51, and a second spring 53 is provided between the sleeve body 51 and the stop ring 52, the second spring 53 is used for: after the solenoid operating member 30 releases the attraction of the valve body 20, that is, after the energization of the solenoid is stopped, the second spring 53 is used to return the valve body 20 after the movement to return the valve body 20 to the initial position.

Preferably, the valve plate 31 of the solenoid 30 is disk-shaped, and the valve plate 31 extends into the valve housing, so that the valve plate 31 serves to position the solenoid 30 such that the solenoid inside the main body portion of the solenoid 30 is coaxial with the valve core 20.

The damper mechanism 40 includes: a buffer chamber 41, a sliding plug 42, a first spring 45, a buffer rod 43, a sleeve retainer 46 and an orifice. A relief chamber 41 is formed on the valve spool 20, specifically, the relief chamber 41 extends axially inward from an end portion of the valve spool 20; the sliding plug 42 is arranged in the buffer cavity 41 and can slide along the axial direction of the buffer cavity 41; the tail part of the buffer rod 43 is connected to the sliding plug 42, and the head part of the buffer rod 43 extends out of the buffer cavity 41; a first spring 45 is arranged in the buffer chamber 41, the first spring 45 pushing against the sliding plug 42 towards the valve plate 31; a sleeve retainer ring 46 is arranged in the buffer cavity 41 and close to the end face of the valve core 20, and the sleeve retainer ring 46 is used for limiting the sliding plug 42 from falling out of the buffer cavity 41; the orifice is opened in the valve body 20 and radially penetrates the cushion chamber 41. Wherein: the spring constant of the first spring 45 is greater than that of the second spring 53, and in colloquial, the second spring 53 is softer than the first spring 45.

Based on the above, it can be seen that: when the electromagnetic action component 30 is energized to generate magnetic attraction to the valve core 20, the valve core 20 moves towards the corresponding electromagnetic action component 30, the valve core 20 moves and simultaneously drives the damping mechanism 40 to move towards the valve plate 31, as shown in fig. 3 and 4, after the head of the damping rod 43 of the damping mechanism 40 contacts the valve plate 31, the damping rod 43 starts to retract and forces the first spring 45 to be compressed, the damping cavity 41 is simultaneously reduced, the hydraulic medium in the damping cavity 41 flows into the valve cavity through the throttle hole, and at this time, the acting force of the first spring 45 and the hydraulic medium in the damping cavity 41 on the sliding plug 42 can play a damping role.

In some preferred embodiments, a buffer pad 44 is provided on an end surface of the head of the buffer rod 43, the buffer pad 44 is made of a nylon material, and the buffer pad 44 has a certain elasticity for buffering an impact when the buffer rod 43 is just in contact with the valve plate 31.

The utility model provides an above-mentioned solenoid valve's advantage lies in:

1. the shock between the valve body 20 and the valve plate 31 can be greatly damped by adding the damper mechanism 40.

2. The first spring 45 can play a role of relieving the impact of the valve spool 20 and the valve plate 31.

3. The orifice gives a certain damping effect to the hydraulic medium by restricting the flow rate of the hydraulic medium flowing out of the damping chamber 41, and provides a softer damping effect to the valve element 20 and the valve plate 31.

4. The second spring 53 is used to restore the valve body 20 to the maximum extent by making the spring constant of the first spring 45 larger than that of the second spring 53.

Moreover, although exemplary embodiments have been described herein, the scope thereof includes any and all embodiments based on the present invention with equivalent elements, modifications, omissions, combinations (e.g., of various embodiments across), adaptations or variations. The elements of the claims are to be interpreted broadly based on the language employed in the claims and not limited to examples described in the present specification or during the prosecution of the application, which examples are to be construed as non-exclusive. It is intended, therefore, that the specification and examples be considered as exemplary only, with a true scope and spirit being indicated by the following claims and their full scope of equivalents.

The above description is intended to be illustrative and not restrictive. For example, the above-described examples (or one or more versions thereof) may be used in combination with each other. For example, other embodiments may be used by those of ordinary skill in the art upon reading the above description. Additionally, in the foregoing detailed description, various features may be grouped together to streamline the disclosure. This should not be interpreted as an intention that a disclosed feature not claimed is essential to any claim. Rather, inventive subject matter may lie in less than all features of a particular disclosed embodiment. Thus, the following claims are hereby incorporated into the detailed description as examples or embodiments, with each claim standing on its own as a separate embodiment, and it is contemplated that these embodiments may be combined with each other in various combinations or permutations. The scope of the invention should be determined with reference to the appended claims, along with the full scope of equivalents to which such claims are entitled.

The above embodiments are only exemplary embodiments of the present invention, and are not intended to limit the present invention, and the protection scope of the present invention is defined by the claims. Various modifications and equivalents of the invention can be made by those skilled in the art within the spirit and scope of the invention, and such modifications and equivalents should also be considered as falling within the scope of the invention.

Claims

1. A solenoid valve, comprising:

a valve body having a valve cavity formed therein;

2. The solenoid valve as claimed in claim 1, wherein said damping mechanism comprises:

a buffer chamber extending axially inward from an end face of the valve spool;

3. The electromagnetic valve according to claim 2, characterized in that an orifice is opened at an end of the valve core, and the orifice penetrates to the buffer chamber.

4. The solenoid valve of claim 2 wherein the end of said bumper bar is fitted with a bumper pad.

5. The solenoid valve of claim 4 wherein said cushion is made of a nylon material.

6. The electromagnetic valve according to claim 2, wherein a sleeve is mounted at an end of each valve body, a stop ring opposite to the sleeve is sleeved at a step of the valve core, and a second spring is arranged between the stop ring and the sleeve;

7. The solenoid valve of claim 6, wherein the valve plate extends into the housing body.

8. The solenoid valve of claim 1, wherein the solenoid valve is a solenoid directional valve.

9. Electro-hydraulic control system, characterized by comprising a solenoid valve according to any one of claims 1 to 8.