KR20000077067A - Electromagnetic valve - Google Patents

Abstract

The present invention provides a solenoid valve which can be miniaturized, and the solenoid valve according to the present invention has a first guide portion 31 of the armature 3 guided to the sleeve 6 and an armature guided to the housing 3. 3) a second guide portion 32, the outer circumference of the armature 3 between the first guide portion 31 and the second guide portion 32 is separated from the housing 2, and the yoke has a housing ( On the 2) side, it can extend to the vicinity of the 1st guide part 31. FIG.

Description

Electronic valve {Electromagnetic valve}

The present invention relates to a solenoid valve.

The conventional solenoid valve a opens and closes the solenoid valve a by making a current flow through the electromagnetic coil h, generating a magnetic flux in the yoke g, and sliding the armature f as shown in FIG. Controlled.

At this time, the armature f to be slid is guided along the inner wall of the sleeve i and slid smoothly in the axial direction. This is feasible because the casing of the solenoid valve a is long enough, and a sufficient guide length L is provided between the sleeve i and the armature f. In order to slide the armature f in the sleeve as mentioned above, it was necessary to lengthen the casing of the solenoid valve a.

Further, the magnetic flux 1 generated in the electromagnetic coil h is partially shown by a dotted line, the yoke g disposed on the outer circumference of the electromagnetic coil h, and the core disposed in a part of the center of the solenoid valve ( j), the open circuit which flows into the armature f, the bushing k, and the housing b is comprised. The armature f slides due to a change in the current flowing through the electromagnetic coil h, and the first flow path port is formed at the valve portion e near the end of the valve rod m which is integrally engaged with the armature f. The brake fluid flow path between c) and the second flow path port d was opened and closed.

The present invention provides a solenoid valve which can be miniaturized.

1 is a partial longitudinal cross-sectional view of a solenoid valve according to the present invention,

Is a partial perspective view of the armature,

3 is a partial longitudinal cross-sectional view of a conventional solenoid valve.

Description of symbols for the main parts of the drawings

1: solenoid valve 2: housing

3: amateur 4: electromagnetic coil

5: yoke 6: sleeve

7 core 11 valve part

12: spring 21: the first euro port

22: second euro port 31: the first guide portion

32: separation part 33: second guide

34: groove portion 35: large diameter portion

36: middle neck 41: magnetic flux

51: outer side of the yoke 52: middle of the yoke

53: outside of yoke

The solenoid valve according to the present invention includes an armature surrounded by a part of the circumference by a housing, an electromagnetic coil surrounding a part of the armature around the armature, a yoke disposed on the outer circumference of the electromagnetic coil, and an armature between the electromagnetic coil and the armature. A nonmagnetic material sleeve, a first guide portion of the armature guided by the sleeve, and a second guide portion of the armature guided by the housing, the outer circumference of the armature between the first guide portion and the second guide portion is separated from the housing The yoke extends from the housing side to the vicinity of the first guide and is disposed between a portion of the solenoid coil and the sleeve, or

In the above-mentioned solenoid valve, the space | interval of a 1st guide part and a sleeve is narrower than the space | interval of a 2nd guide part and a housing.

EMBODIMENT OF THE INVENTION Hereinafter, embodiment of this invention is described using drawing.

end. Overview of the solenoid valve

The solenoid valve 1 opens and closes the hydraulic flow path by the electromagnetic force generated by the electromagnetic coil 4. For example, as illustrated in FIG. 1, the electromagnetic coil 4 having a cylindrical shape on the upper portion of the housing 2. Is installed, the core 7 and the armature 3 of the magnetic body are disposed inside the electromagnetic coil 4, the valve portion 11 is formed near the lower end of the armature 3, and the first flow path port 21 ) And the flow path between the second flow path port 22 is opened and closed.

The operation of the solenoid valve causes a current to flow through the electromagnetic coil 4, the armature 3 slides with respect to the housing 2, and opens and closes the valve portion 11 so that the first flow path port 21 and the second flow path port ( 22) Open and close the brake hydraulic passage.

I. housing

The housing 2 is a base for forming the solenoid valve 1, and a flow path connecting the first flow path port 21 and the second flow path port 22 is formed therein, and the valve part 11 is formed in the middle of the flow path. Is arranged, and an armature 3 which slides with respect to the housing 2 is arranged.

All. Amateur

The armature 3 slides with respect to the housing 2 by the magnetic field generated by the electromagnetic coil 4 to open and close the valve portion 11, and the first guide portion 31 guided in contact with the sleeve 6. And a second guide portion 33 guided in contact with the housing 2, the first guide portion 31 moves along the sleeve 6, and the second guide portion 33 moves the housing 2. Moving along, the armature 3 is guided smoothly with respect to the housing 2.

In this way, the first guide part 31 and the second guide part 33 are guided along different members, and the distance between the first guide part 31 and the second guide part 33 is increased, so that the armature 3 Even if the length of) is short, the armature 3 can slide steadily. As a result, the solenoid valve 1 can be shortened and the slide of the armature 3 can be smoothed further.

The armature 3 includes, for example, a large diameter portion 35, a separation portion 32, and a middle diameter portion 36, as shown in FIG. 2. The large diameter part 35 is large in diameter, and contact | connects the sleeve 6 in the outer periphery, and forms the 1st guide part 31. FIG. The diameter is smaller than the middle diameter part 36 and the large diameter part 35, and the 2nd guide part 32 is formed in contact with the housing 2 in the outer periphery. The separation part 32 has a diameter smaller than the middle diameter part 36 between the large diameter part 35 and the middle diameter part 36, and the outer periphery separates from the sleeve 6 and the housing 2.

The clearance between the housing 2 and the middle diameter part 36 is larger than the space | interval of the sleeve 6 and the large diameter part 35, for example, one digit larger, and in the 2nd guide part, the housing 2 and the middle diameter part 36 are larger. Weakens the electromagnetic coupling force.

The armature 3 is formed with a trench 34 in which brake fluid flows around its outer circumference. This makes it easier for the brake fluid to flow along the trench 34 due to the sliding of the armature 3, so that, for example, the viscosity of the brake fluid at low temperature becomes high and the flow of the brake fluid becomes difficult. It can reduce the resistance generated. The groove portion 34 is formed in the large diameter portion 35 and the medium diameter portion 36, as shown in Figs. 1 and 2, and the separation portion 32 has a small diameter, so it is not necessary to form it.

la. sleeve

The sleeve 6 is disposed between the armature 3 and the electromagnetic coil 4, contacts the first guide part 31 of the armature 3 to guide the armature 3, and is formed in, for example, a cylindrical shape. And the inside of the cylindrical electromagnetic coil 4. Inside the sleeve 6, the core 7, which is a cylindrical magnetic body, and the large diameter portion 35 of the armature 3 are disposed, so that the electromagnetic coupling force with the large diameter portion 35 of the armature 3 does not occur. (6) consists of nonmagnetic material.

hemp. York

The yoke 5 is formed of a magnetic member that prevents the magnetic flux generated from the electromagnetic coil 4 from becoming wider, and has an inner portion for preventing the magnetic flux 41 from flowing to the second guide portion 32 of the armature 3, For example, the first guide portion of the armature between the outer circumferential portion of the electromagnetic coil 4, the yoke intermediate portion 52 of the electromagnetic coil 4 and the housing 2, and the electromagnetic coil 4 and the sleeve 6 ( 31) and a yoke inner portion 53 extending to the vicinity.

The operation of the armature will be described below.

bar. Amateur guide

The armature slides with respect to the sleeve 6 in the first guide part 31 and with respect to the housing 2 in the second guide part 33, so that the first guide part 31 and the second guide part 33. Since the distance between them can be long, it can slide smoothly.

four. Magnetic flux

The magnetic flux generated by the electromagnetic coil 4 mainly concentrates into the yoke 5, and the sleeve 6 is removed from the yoke outer peripheral portion 51, the yoke middle portion 52, and the yoke inner portion 53 of the yoke 5. The loop passes through the large diameter portion 35 of the armature and returns from the core 7 to the yoke outer peripheral portion 51.

Since the yoke inner portion 53 is formed in the yoke 5, the magnetic flux 41 is less likely to flow into the housing 2, and the gap between the armature portion 32 of the armature and the housing 2 becomes wider. In addition, since the clearance between the second guide portion 33 and the housing 2 of the armature is wider than that of the first guide portion 31, the flow to the housing 2 becomes difficult. As a result, the electromagnetic coupling force between the second guide portion 33 and the housing 2 of the armature can be weakened, and the slide of the armature 3 can be smoothed.

Ah. Operation

For example, in FIG. 1, when the magnetic field is not generated, the armature 3 is pushed down by the spring 12 to bring the valve portion 11 to a closed state. When a magnetic field is generated in the electromagnetic coil 4, the magnetic flux is concentrated in the yoke 5, the core 7, and the large diameter portion 35 of the armature, and the armature 3 runs against the force of the spring 12. Pulled out by (7), the valve part 11 is in the open state. When the armature 3 is moved, the brake fluid flows through the armature portion 34 of the armature to smooth the movement of the armature 3.

According to the present invention, the following effects can be obtained.

1. In the present invention, the armature guide portion is provided in two separate positions, and the solenoid valve can be shortened to ensure smooth sliding of the armature.

2. The present invention forms the yoke inner portion in the yoke, making it difficult for the magnetic flux to flow to the housing and the guide of the armature, thereby preventing leakage.

Claims (2)

An amateur surrounded by a housing with a portion around the periphery, An electromagnetic coil surrounding a part of the armature of the amateur, a yoke disposed on the outer periphery of the electromagnetic coil, A nonmagnetic sleeve disposed between the electromagnetic coil and the armature, The first guide of the amateur guided to the sleeve, A second guide part of the armature guided to the housing, The outer circumference of the armature between the first guide portion and the second guide portion is separated from the housing, and the yoke extends from the housing side to the vicinity of the first guide portion and is disposed between a portion of the electromagnetic coil and the sleeve. The solenoid valve of claim 1, wherein a distance between the first guide part and the sleeve is smaller than a distance between the second guide part and the housing.