CN211344174U

CN211344174U - Normally open solenoid valve

Info

Publication number: CN211344174U
Application number: CN201921954480.XU
Authority: CN
Inventors: 黄朕; 郑利水; 张�杰; 李立刚; 郝江脉
Original assignee: Zhejiang Asia Pacific Mechanical and Electronic Co Ltd
Current assignee: Zhejiang Asia Pacific Mechanical and Electronic Co Ltd
Priority date: 2019-11-13
Filing date: 2019-11-13
Publication date: 2020-08-25
Anticipated expiration: 2029-11-13

Abstract

The utility model discloses a normally open solenoid valve. The armature core is arranged in the valve body, the valve body is sleeved on the valve body, the; the ejector rod comprises a sealing end at the lower end and a supporting end at the upper end; support the end upper end and be close to terminal surface department and offer annular gasket mounting groove, support end upper portion outer peripheral face and offer a plurality of oil grooves of crossing of circumference equipartition, the installation department is installed in the mounting groove of ejector pin on the elastic gasket, installation department and valve body upper end tip plane contact under the elastic gasket. The utility model discloses an elastic gasket replaces the spring in the current scheme as elastic element jack-up ejector pin, has avoided having reduced manufacturing cost because of the leakproofness decline problem that the riveting support ring leads to the valve body to warp the initiation, has improved the product percent of pass.

Description

Normally open solenoid valve

Technical Field

The utility model relates to a control valve technical field especially relates to a car braking system is with normally open solenoid valve

Background

As a key component of an active safety system of an automobile, an electronic stability control system (ESC) of the automobile has been widely used domestically. ESC realizes the accurate control to vehicle wheel cylinder brake pressure through ECU control solenoid valve's switching, reaches to guarantee vehicle driving stability, prevents to produce danger such as whipping, sideslip because of the wheel locking.

As shown in fig. 1, most of the existing normally open solenoid valves adopt a spring sleeved on a push rod as an elastic element to apply elastic force to the push rod, so that the push rod drives an armature core to separate from a valve seat, and the normally open state of the solenoid valve is realized; although this structure has been mass-produced, there are the following disadvantages: one end of the spring is limited by a boss at the joint position of the supporting end and the sealing end on the ejector rod, and in order to ensure the limit of the other end of the spring, a supporting ring is riveted in an inner hole of the valve body; because the assembly support ring needs great riveting pressure, the riveting process easily causes the deformation of the inner hole of the valve body, the circumferential sealing performance of the riveted valve body and the valve seat is affected, and the production cost is increased.

SUMMERY OF THE UTILITY MODEL

The support ring is difficult to assemble and high in production cost. The utility model provides a normally open solenoid valve.

The utility model adopts the technical scheme as follows:

the utility model discloses a guide pin bushing, elastic gasket, ejector pin, valve body, disk seat and oil filter subassembly, still include elastic gasket, elastic gasket installs between armature core lower extreme and valve body top and the suit is outside the ejector pin top, elastic gasket mainly comprises upper mounting portion, lower installation department and connecting portion, upper mounting portion and lower installation department are the annular piece that is located inner circle and outer lane respectively, connect through connecting portion between upper mounting portion and the lower installation department, connecting portion are the big little conical ring piece in upper end of lower extreme, make upper mounting portion be higher than lower installation department; the ejector rod is mainly formed by coaxially connecting a sealing end at the lower end with a supporting end at the upper end, the outer diameter of the sealing end is smaller than that of the supporting end, and the lower part of the sealing end is a spherical head; an annular gasket mounting groove is formed in the upper end of the supporting end, close to the end face, and a plurality of oil passing grooves are formed in the peripheral surface of the upper portion of the supporting end and are uniformly distributed at intervals along the circumferential direction; the upper mounting part of the elastic gasket is mounted in the mounting groove of the ejector rod, and the lower mounting part of the elastic gasket is in plane contact with the upper end part of the valve body.

The oil passing groove comprises four semicircular oil passages which penetrate through the axis of the ejector rod and are symmetrically arranged along the circumferential direction.

The elastic gasket is made of elastic materials.

The middle inner hole and the mounting groove which are formed in the middle of the upper mounting part are in interference fit.

Hydraulic oil enters the oil cavity from the bottom of the valve seat, the oil pressure is applied to the sealing end of the ejector rod, the elastic force from the lower installation part to the upper installation part is transmitted by the connecting part, and the ejector rod is pushed to drive the armature core to be far away from the valve seat.

The utility model has the advantages as follows:

the utility model discloses an elastic gasket replaces the spring as elastic element jack-up ejector pin, owing to cancelled the support ring structure, has avoided having reduced manufacturing cost because of the leakproofness decline problem that the riveting support ring leads to the valve body to warp and causes, has improved the product percent of pass.

Drawings

FIG. 1 is a schematic structural diagram of a conventional normally open solenoid valve;

FIG. 2 is a schematic structural view of the normally open solenoid valve in the power-off state of the present invention;

fig. 3 is a schematic structural view of the normally open solenoid valve in the power-on state of the present invention;

FIG. 4 is a schematic view of the structure of the elastic pad of the present invention;

FIG. 5 is a schematic view of the structure of the ejector rod of the present invention;

FIG. 6 is a partially enlarged view of the ejector pin of the present invention;

fig. 7 is a cross-sectional view of the ejector rod of the present invention.

Description of the drawings: the oil filter comprises a guide sleeve 1, an armature core 2, an elastic gasket 3, an ejector rod 4, a valve body 5, a valve seat 6, an oil filter ring 7, a steel ball 8, an oil filter ring 9, a spring 10, a support ring 11, an upper mounting part 3.1, a lower mounting part 3.2, a connecting part 3.3, a sealing end 4.1, a support end 4.2, a gasket mounting groove 4.2 and an oil groove 4.2.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. It is to be understood that the embodiments described are only some embodiments of the invention, and not all embodiments.

The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

As shown in fig. 1, the conventional normally open solenoid valve includes a guide sleeve 1, an armature core 2, a push rod 4, a valve body 5, a valve seat 6 and an oil filter assembly, the guide sleeve 1 is fixedly covered on the upper end of the valve body 5, the armature core 2 is assembled in a space formed by the upper end of the valve body 5 and an inner cavity of the guide sleeve 1, a coil is arranged outside the guide sleeve 1 around the armature core 2, the outer peripheral surface of the armature core 2 is in clearance fit with the inner peripheral surface of the guide sleeve 1, symmetrical oil grooves are circumferentially arranged on the valve body 5, and an armature core moving space is formed in the axial direction. The oil filter assembly mainly comprises an annular oil filter 7, a steel ball 8 and an end oil filter 9, the valve seat 6 is tightly mounted inside the lower end of the valve body 5, the inner circumference of the valve seat 6 is in interference fit with the annular oil filter 7, the end oil filter 9 is mounted in a slotted hole in the bottom of the annular oil filter 7, oil enters from the end oil filter 9, the outer circumference of the end oil filter 9 is in interference fit with the bottom of the annular oil filter 7, the steel ball 8 and the annular oil filter 7 form a one-way valve, and the steel ball has a movable gap in the axial direction of the end oil filter 9; the ejector rod 4 is arranged in a central through hole of the valve body 5, the upper end of the ejector rod 4 is in contact connection with the bottom surface of the armature core 2, and the lower end of the ejector rod 4 is assembled to an overflowing hole formed in the top end of the valve seat 6; a support ring 11 is arranged between the central through hole of the valve body 5 and the ejector rod 4, the support ring 11 is positioned in the middle of the central through hole and is fixedly riveted and installed in the central through hole, and the support ring 11 is connected with the step surface on the upper portion of the ejector rod 4 through a spring 10. The metal support ring 11 is riveted and installed in a central through hole of the valve body 5, through holes are formed in the side walls of the two sides of the valve body 5 between the support ring 11 and the valve seat 6, and the through holes are used as oil outlets.

As shown in fig. 2 and 3, the utility model discloses specific implementation has removed support ring 11 and spring 10, strains the subassembly including guide pin bushing 1, elastic gasket 3, ejector pin 4, valve body 5, disk seat 6 and oil, still includes elastic gasket 3, and elastic gasket 3 installs between 2 lower extremes of armature core and 5 tops of valve body and the suit is outside 4 tops of ejector pin.

As shown in fig. 4, the elastic gasket 3 mainly includes an upper mounting portion 3.1, a lower mounting portion 3.3, and a connecting portion 3.2, the upper mounting portion 3.1 and the lower mounting portion 3.3 are annular pieces respectively located at the inner ring and the outer ring, the upper mounting portion 3.1 and the lower mounting portion 3.3 are connected by the connecting portion 3.2, and the connecting portion 3.2 is a tapered annular piece with a large lower end and a small upper end, so that the upper mounting portion 3.1 is higher than the lower mounting portion 3.3.

As shown in fig. 5 and 6, the rod 4 is mainly composed of a sealing end 4.1 at the lower end and a supporting end 4.2 at the upper end which are coaxially connected, the outer diameter of the sealing end 4.1 is smaller than that of the supporting end 4.2, the sealing end 4.1 and the supporting end 4.2 are both of a nearly cylindrical structure, and the lower part of the sealing end 4.1 is a spherical head; an annular gasket mounting groove 4.2.1 is formed in the upper end of the supporting end 4.2 close to the end face, and a plurality of oil passing grooves 4.2.2 are formed in the peripheral face of the upper portion of the supporting end 4.2 at intervals in the circumferential direction. As shown in fig. 7, the oil passing groove 4.2.2 includes four semicircular oil passages which penetrate through the axis of the ejector rod 4 and are symmetrically arranged along the circumferential direction, each oil passing groove 4.2.2 is a strip-shaped groove structure which is axially arranged on the outer peripheral surface of the supporting end 4.2 along the supporting end 4.2, the oil passing groove 4.2.2 penetrates through the axial length of the whole supporting end 4.2, namely the length of the oil passing groove 4.2.2 is matched with the length of the supporting end 4.2, the brake fluid can reach the oil groove through the oil groove 4.2.2, and the periphery of the armature core is ensured to be covered by the brake fluid.

The upper mounting part 3.1 of the elastic gasket 3 is mounted in the mounting groove 4.2.1 of the ejector rod 4, and an inner hole 3.4 formed in the middle of the upper mounting part 3.1 is in interference fit with the mounting groove 4.2.1.

The lower installation part 3.3 of the elastic gasket 3 is in plane contact with the upper end part of the valve body 5, hydraulic oil enters the oil cavity from the bottom of the valve seat 6, the oil pressure is applied to the sealing end 4.1 of the ejector rod 4, the elastic force of the lower installation part 3.3 to the upper installation part 3.1 is transmitted by the connecting part 3.2, and the ejector rod 4 is pushed to drive the armature core 2 to be far away from the valve seat 6.

The implementation working process of the invention is as follows:

when the coil is in a power-off state, the elastic gasket 3 transmits elastic force to the upper mounting part 3.1 through the connecting part 3.2, at the moment, the elastic force generated by the elastic gasket 3 is enough to overcome the gravity of the armature core and the ejector rod, and pushes the ejector rod 4 fixedly connected with the elastic gasket to drive the armature core 2 to move upwards along the axis direction until the armature core moves to the upper limit position of the moving space of the armature core, at the moment, the spherical head part of the sealing end 4.1 of the ejector rod 4 is separated from the sealing surface of the valve seat, and the oil inlet of the valve seat is opened; at the moment, the liquid flows upwards along the end oil filter 9, the upwards flowing liquid pushes the steel ball 8 to be tightly attached to the sealing conical surface, and the one-way valve is closed; liquid flows through the annular oil passing surface of a gap generated after the ejector rod 4 is separated from the valve seat 6 and flows out through the oil outlet holes symmetrically arranged on two sides of the valve body 5, so that a normally open oil way of the normally open electromagnetic valve is formed.

When the coil is in a power-on state, as shown in fig. 3, the coil generates electromagnetic force downward along the axis on the armature core and applies the electromagnetic force to the ejector rod 4, the ejector rod 4 is subjected to stress analysis, the liquid force and the elastic force applied to the ejector rod 4 are both vertical and upward, and an upward resultant force is formed and is far smaller than the sum of the electromagnetic force applied to the ejector rod 4 by the armature core 2 and the downward resultant force of the gravity of the armature core and the ejector rod, so that the armature core pushes the ejector rod to move downward until the spherical head of the sealing end 4.1 of the ejector rod 4 is tightly attached to the sealing surface of the valve seat, and the oil inlet of the; liquid can not flow out of the valve body oil outlet hole through the valve seat, and the oil way of the normally open electromagnetic valve is closed. At the moment, the liquid flows upwards along the end oil filter 9, the liquid flowing upwards pushes the steel ball 8 to be attached to the sealing conical surface 15, and the one-way valve is closed.

In addition to the above preferred embodiments, the present invention has other embodiments, and those skilled in the art can make various changes and modifications according to the present invention without departing from the spirit of the present invention, which should fall within the scope defined by the appended claims.

Claims

1. The utility model provides a normally open solenoid valve, includes guide pin bushing (1), elastic gasket (3), ejector pin (4), valve body (5), disk seat (6) and oil filter subassembly, its characterized in that: the elastic gasket (3) is arranged between the lower end of the armature core (2) and the top end of the valve body (5) and is sleeved outside the top end of the ejector rod (4), the elastic gasket (3) mainly comprises an upper mounting part (3.1), a lower mounting part (3.3) and a connecting part (3.2), the upper mounting part (3.1) and the lower mounting part (3.3) are annular pieces which are respectively positioned on an inner ring and an outer ring, the upper mounting part (3.1) and the lower mounting part (3.3) are connected through the connecting part (3.2), and the connecting part (3.2) is a conical annular piece with a large lower end and a small upper end, so that the upper mounting part (3.1) is higher than the lower mounting part (3.3); the ejector rod (4) is mainly formed by coaxially connecting a sealing end (4.1) positioned at the lower end with a supporting end (4.2) positioned at the upper end, the outer diameter of the sealing end (4.1) is smaller than that of the supporting end (4.2), and the lower part of the sealing end (4.1) is a spherical head; an annular gasket mounting groove (4.2.1) is formed in the upper end of the supporting end (4.2) close to the end face, a plurality of oil passing grooves (4.2.2) are circumferentially and uniformly distributed on the outer peripheral surface of the upper portion of the supporting end (4.2) at intervals, and each oil passing groove (4.2.2) is a strip-shaped groove structure axially formed in the outer peripheral surface of the supporting end (4.2) along the supporting end (4.2); an upper mounting part (3.1) of the elastic gasket (3) is mounted in a mounting groove (4.2.1) of the ejector rod (4), and a lower mounting part (3.3) of the elastic gasket (3) is in plane contact with the upper end part of the valve body (5).

2. A normally open electromagnetic valve according to claim 1, characterized in that: the oil passing groove (4.2.2) comprises four semicircular oil passages which penetrate through the axis of the ejector rod (4) and are symmetrically arranged along the circumferential direction.

3. A normally open electromagnetic valve according to claim 1, characterized in that: the elastic gasket (3) is made of elastic materials.

4. A normally open electromagnetic valve according to claim 1, characterized in that: and an inner hole (3.4) formed in the middle of the upper mounting part (3.1) is in interference fit with the mounting groove (4.2.1).

5. A normally open electromagnetic valve according to claim 1, characterized in that: hydraulic oil enters the oil cavity from the bottom of the valve seat (6), oil pressure is applied to a sealing end (4.1) of the ejector rod (4), the elastic force from the lower installation part (3.3) to the upper installation part (3.1) is transmitted by the connecting part (3.2), and the ejector rod (4) is pushed to drive the armature core (2) to be far away from the valve seat (6).