CN211344175U

CN211344175U - Normally closed electromagnetic valve

Info

Publication number: CN211344175U
Application number: CN201921954493.7U
Authority: CN
Inventors: 刘菁晗; 郑利水; 黄朕; 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 closed solenoid valve. The oil filter comprises a stop iron, a guide sleeve, an elastic gasket, an armature core, a retainer ring, a valve seat, an oil filter and a steel ball, wherein the lower end of the stop iron is fixedly sleeved in the upper end of the guide sleeve, the armature core is arranged in the guide sleeve, the elastic gasket is arranged between the top surface of the armature core and the bottom surface of the stop iron, the outer peripheral surface of the armature core is in clearance fit with the inner peripheral surface of the guide sleeve, the valve seat is fixedly arranged in the lower end of the guide sleeve, an oil inlet hole is formed in the peripheral side surface of the middle part of the valve seat, an oil outlet through hole is formed in the center of the bottom of the valve seat, the upper end surface of the oil; the valve seat is sleeved with an oil filter. The utility model discloses but set up spring washer direct control armature core home distance, avoided the solenoid valve assembly in-process to armature core clearance's inspection technology, effectively reduced the technology degree of difficulty, promoted the production efficiency of product.

Description

Normally closed electromagnetic valve

Technical Field

The utility model relates to a control valve technical field especially relates to a normally closed solenoid valve for automobile braking system.

Background

Normally closed solenoid valves are used in both anti-lock braking systems (ABS) and Electronic Stability Program (ESP) systems of automobiles. Normally closed solenoid valves are normally separated from each other by a spring, and the spring applies a certain acting force to the armature core to make the steel ball of the armature core contact with the conical surface of the valve seat to form a sealing surface, so as to realize the normally closed state of the solenoid valve. Corresponding matching holes or other matching structures are required to be processed on the armature core and the stop iron for facilitating the installation of the spring. And the springs are nested and gathered together before assembly, and the springs are not easily separated manually by staff on a production line or need to be separated one by special equipment. And the size and rigidity of the spring serving as the deformation piece generally have a larger tolerance range, so that the assembly precision and consistency of the electromagnetic valve are not easy to guarantee. When the electromagnetic normally-closed valve is assembled, a certain requirement is usually set on the distance between the armature core and the stop iron to ensure the corresponding movable distance of the armature core, so that the gap is usually required to be measured in the assembling process, and sometimes, the gap is required to be repeatedly adjusted until the gap reaches the corresponding range when the gap is not in accordance with the requirement, thereby increasing the difficulty of the assembling process.

SUMMERY OF THE UTILITY MODEL

In order to solve the problems, the assembly precision and consistency of the electromagnetic normally-closed valve are improved, the assembly process difficulty is reduced, and the production efficiency of products is improved. The utility model provides a normally closed solenoid valve structure.

The utility model adopts the technical scheme as follows:

the utility model discloses a buting iron, the guide pin bushing, the elastic gasket, armature core, the disk seat, oil is strained and the steel ball, fixed cover dress of buting iron lower extreme is in the guide pin bushing upper end, armature core dress is in the guide pin bushing, the elastic gasket is installed between armature core top surface and buting iron bottom surface, the outer peripheral face of armature core and the inner peripheral surface clearance fit of guide pin bushing, the disk seat is fixed to be adorned in the guide pin bushing lower extreme, the oil inlet has been seted up to the side around the disk seat middle part, the oil outlet through-hole is seted up to disk seat bottom center, the hole up end processing of oil outlet through-hole becomes the conical surface, armature core lower extreme solid chain is equipped with; the valve seat is sleeved with an oil filter.

The elastic gasket comprises a large ring, a small ring and connecting ribs, the small ring and the large ring are annular sheets respectively positioned on the inner ring and the outer ring, the small ring and the large ring are connected through the connecting ribs arranged at intervals along the circumference, the small ring is higher than the large ring under a normal state, the bottom surface of the large ring is in contact with the stop iron, and the top surface of the small ring is in contact with the armature core.

The lower part of the guide sleeve is provided with a convex expansion sleeve part with larger radial dimension, and the outer step of the expansion sleeve part is provided with a retaining ring.

The guide sleeve is sleeved in the inner peripheral surface of the expansion sleeve part of the valve seat in an interference manner.

The upper end of the oil filter extends upwards and is sleeved outside the expansion sleeve part of the guide sleeve and is installed in an interference fit mode.

The utility model has the advantages as follows:

the utility model discloses use the elastic gasket to replace the spring to make steel ball and disk seat conical surface contact on the armature core as elastic element, need not to be equipped with spring mounting hole or other spring fixed knot structure on armature core and the buting iron, reduced armature core and buting iron processing cost.

The utility model discloses an elastic gasket can not appear the spring nestification condition together, need not the manual separation spring of assembly personnel or be equipped with special spring separation equipment. The distance between the planes of the large ring and the small ring of the elastic gasket can directly control the moving distance of the armature core, and the gap does not need to be measured in the assembling process.

The utility model discloses can effectively reduce technology assembly complexity, help improving the production efficiency of product.

Drawings

FIG. 1 is a schematic structural view of a normally closed solenoid valve in a power-off state of the present invention;

fig. 2 is a top view of the elastic pad of the present invention;

FIG. 3 is a cross-sectional view of the elastic pad of the present invention in a natural state;

fig. 4 is a cross-sectional view of the elastic gasket of the present invention in a compressed state.

Description of the drawings: 1-stop iron, 2-guide sleeve, 3-elastic gasket, 4-armature core, 5-retainer ring, 6-valve seat, 7-oil filter, 8-steel ball, 3-1-large ring, 3-2-small ring, 3-connecting rib, 3-1-large ring upper end face, 3-2-1-small ring upper end face, L1-distance from elastic gasket large ring upper end face to elastic gasket small ring upper end face.

Detailed Description

The invention will be further described with reference to the accompanying drawings in the embodiments of the invention:

as shown in figure 1, the concrete implementation mode comprises a stop iron 1, a guide sleeve 2, an elastic gasket 3, an armature core 4, a retainer ring 5, a valve seat 6, an oil filter 7 and a steel ball 8, wherein the lower end of the stop iron 1 is fixedly sleeved in the upper end of the guide sleeve 2, the stop iron 1 is welded with the guide sleeve 2, the armature core 4 is arranged in the middle of the guide sleeve 2, the elastic gasket 3 is arranged between the top surface of the armature core 4 and the bottom surface of the stop iron 1, the outer circumferential surface of the armature core 4 is in clearance fit with the inner circumferential surface of the guide sleeve 2, the valve seat 6 is fixedly arranged in the lower end of the guide sleeve 2, so that the armature core 4 is assembled in a space formed by the valve seat 6, the stop iron 1 and the guide sleeve 2, the side surface of the periphery of the middle part of the valve seat 6 is provided with an oil inlet, the center of the bottom of the valve seat 6 is provided with an oil outlet, the upper, a steel ball 8 is arranged in the ball hole. The steel ball 8 is in contact with the conical surface of the oil outlet through hole of the valve seat 6 to form a sealing surface; the valve seat 6 is sleeved with an oil filter 7.

The normally closed electromagnetic valve is arranged in an oil environment, and under the condition that the normally closed electromagnetic valve is opened, oil enters an oil inlet hole of the valve seat 6 through the oil filter 7 and then flows out through an oil outlet through hole of the valve seat 6.

As shown in fig. 2 and 3, the elastic gasket 3 comprises a large ring 3-1, a small ring 3-2 and a connecting rib 3-3, the small ring 3-2 and the large ring 3-1 are annular sheets respectively positioned on an inner ring and an outer ring, the small ring 3-2 and the large ring 3-1 are connected through a plurality of connecting ribs 3-3 arranged at intervals along the circumference, the connecting ribs 3-3 are in a radial strip structure, the small ring 3-2 is higher than the large ring 3-1 in a normal state, the bottom surface of the large ring 3-1 is contacted with the iron stop 1, and the top surface of the small ring 3-2 is contacted with the armature core 4.

The lower part of the guide sleeve 2 is provided with a convex expansion sleeve part with larger radial dimension, and the outer step of the expansion sleeve part is provided with a retainer ring 5. The guide sleeve 2 is sleeved in the inner peripheral surface of the expansion sleeve part of the valve seat 6 in an interference manner. The upper end of the oil filter 7 extends upwards and is sleeved outside the expansion sleeve part of the guide sleeve 2 and is installed in an interference fit manner.

The utility model discloses a working process is:

when the elastic gasket 3 is extruded, the distance between the small ring 3-2 and the large ring 3-1 is reduced until the upper end face 3-2-1 of the small ring and the upper end face 3-1-1 of the large ring are on the same plane, and the distance L1 between the upper end face 3-1-1 of the large ring and the upper end face 3-2-1 of the small ring is the moving distance of the armature core 4 in the guide sleeve 2 under the natural state of the elastic gasket 3.

When the external coil is electrified, the armature core 4 and the stop iron 1 are magnetized and mutually attracted together to press the elastic gasket to ensure that the upper end face 3-2-1 of the small ring and the upper end face 3-1-1 of the large ring are positioned on the same plane, as shown in figure 4, the distance between the armature core 5 and the stop iron 1 is reduced, the steel ball 8 on the armature core 4 is separated from the conical surface of the valve seat 6, and the electromagnetic valve is in an open state. After the valve is opened, oil enters the oil inlet hole of the valve seat 6 through the oil filter 7 and then flows out through the oil outlet through hole of the valve seat 6.

When the coil is powered off, the elastic gasket 3 can be restored to a natural state, as shown in fig. 3, the distance between the armature core 4 and the stop iron 1 is increased under the action of the elastic force, so that the steel ball is contacted with the conical surface of the valve seat again to form a sealing surface, and the electromagnetic valve is restored to a normally closed state again. After the valve is closed, oil cannot enter the oil inlet hole of the valve seat 6, and the oil of the valve seat 6 cannot flow out of the oil outlet through hole any more.

Therefore, the utility model discloses an use the spring that the elastic gasket replaces traditional solenoid valve, can simplify armature core and stop iron structure and reduce its processing degree of difficulty. The elastic gasket can not be nested like a spring under the condition that a plurality of elastic gaskets are difficult to separate, and meanwhile, the elastic gasket can directly control the moving distance of the armature core, so that the detection process of the moving gap of the armature core in the electromagnetic valve assembling process is avoided, the process difficulty is effectively reduced, and the production efficiency of products is improved.

Claims

1. A normally closed solenoid valve characterized in that: the oil filter comprises a stop iron (1), a guide sleeve (2), an elastic gasket (3), a linking core (4), a valve seat (6), an oil filter (7) and a steel ball (8), wherein the lower end of the stop iron (1) is fixedly sleeved in the upper end of the guide sleeve (2), the linking core (4) is arranged in the guide sleeve (2), the elastic gasket (3) is arranged between the top surface of the linking core (4) and the bottom surface of the stop iron (1), the outer peripheral surface of the linking core (4) is in clearance fit with the inner peripheral surface of the guide sleeve (2), the valve seat (6) is fixedly arranged in the lower end of the guide sleeve (2), the side surface of the periphery of the middle part of the valve seat (6) is provided with an oil inlet, the center of the bottom of the valve seat (6) is provided with an oil outlet through hole, the upper end surface of the oil outlet through hole is processed into a conical surface, the lower end of the linking core (4); an oil filter (7) is sleeved outside the valve seat (6).

2. A normally closed electromagnetic valve according to claim 1, characterized in that:

the elastic gasket (3) comprises a large ring (3-1), a small ring (3-2) and connecting ribs (3-3), the small ring (3-2) and the large ring (3-1) are annular pieces which are respectively positioned on the inner ring and the outer ring, the small ring (3-2) and the large ring (3-1) are connected through the connecting ribs (3-3) which are arranged at intervals along the circumference, the small ring (3-2) is higher than the large ring (3-1) in a normal state, the bottom surface of the large ring (3-1) is contacted with the iron stop (1), and the top surface of the small ring (3-2) is contacted with the armature core (4).

3. A normally closed electromagnetic valve according to claim 1, characterized in that:

the lower part of the guide sleeve (2) is provided with a convex expansion sleeve part with larger radial dimension, and the outer step of the expansion sleeve part is provided with a check ring (5).

4. A normally closed electromagnetic valve according to claim 3, characterized in that:

the guide sleeve (2) is sleeved in the inner peripheral surface of the expansion sleeve part of the valve seat (6) in an interference manner.

5. A normally closed electromagnetic valve according to claim 3, characterized in that:

the upper end of the oil filter (7) extends upwards and is sleeved outside the expansion sleeve part of the guide sleeve (2) and is installed in an interference fit manner.