JPH0893953A - Three-way solenoid valve - Google Patents

Abstract

PURPOSE: To provide a three-way solenoid valve in which the number of constituting part items is minimized to facilitate the inspection of a valve part and the assembling. CONSTITUTION: A valve element 28 is arranged on the inside of a spacer 27, and the diameter contracted parts of valve seat members 25, 26 are pressed into the inside of the spacer 27 to form an assembly 29 consisting of the valve seat members 25, 26, the spacer 27, and the valve element 28. This assembly 29 is inserted into the middle diameter part 12b of a stepped cylinder hole 12, and the circumferential part of the upper end of the middle diameter part 12b is caulked, whereby a lock part 11a is formed to fix the valve seat members 25, 26 in the sealed state to a body 11.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a three-way solenoid valve used as a brake fluid pressure control valve for a vehicle hydraulic brake device.

[0002]

2. Description of the Related Art Recently, in the technical field of solenoid valves, the cost has been reduced by reducing the number of constituent parts. In WO93-8051, in a two-way solenoid valve, after inserting a valve seat member into the small diameter part of the stepped cylinder hole of the body, the valve seat member is formed into the body by caulking the periphery of the end of the small diameter part. In contrast, fix it in a sealed state,
After inserting the bulge end of the fixed core of the electromagnet and the bulge end of the sleeve into which the fixed core is inserted into the middle diameter part of the stepped cylinder hole, caulking the periphery of the middle diameter part of the fixed core And fixing the sleeve in a sealed manner to the body. According to this technique, a seal member between the body and the valve seat member and a seal member between the body and the fixed iron core and the sleeve are unnecessary.

[0003]

However, in the above-mentioned conventional device, the flow rate characteristics when the valve element is separated from the valve seat member and the sealing characteristics when the valve element is seated on the valve seat satisfy the standards. It is not possible to say that the workability of the inspection is good because it can only be inspected whether or not it is in the state of the solenoid valve assembly, and if it fails, the entire solenoid valve assembly is discarded and There is the problem of being an economy.

According to the invention of this application, the valve seat member is fixed to the body in a sealed state without using a seal member, and the sealing property between the valve seat member and the valve body and the valve body are separated from the valve seat member. It is easy to check the flow rate in the detached state,
It is an object to provide a three-way solenoid valve that is easy to assemble.

[0005]

A three-way solenoid valve according to the invention of the present application according to the above object has a stepped cylinder hole and one end of the stepped cylinder hole, as described in claim 1.
First communicating with the medium diameter portion and the other end, respectively.
And a body having a second port, a third port, and a third port formed therein, and arranged in the intermediate portion and fixed to the body to connect the first port and the second port. A first valve seat member having a first through hole in the center for storing the second port and the third valve, the first valve seat member being disposed in the intermediate portion and fixed to the body.
A second valve seat member having a second through hole at the center for communicating the ports of the first and second valve seat members with each other. A spacer having a diameter portion press-fitted inward, a valve body arranged inside the spacer, for selectively closing one of the two through holes, and the valve body having the second body. A biasing member for biasing the through hole to close, and a biasing member disposed in the other end portion for closing the first through hole against the bias of the biasing member. A rod for pushing and a movable iron core coupled to the rod, an electromagnet for propelling the rod by energizing an electric coil, an assembly of the valve seat members, the spacer and the valve body. By caulking the peripheral portion of the end portion of the intermediate portion after being inserted into the medium diameter portion Made is one in which the respective valve seat member including a stopper portion for fixing to the seal state with respect to the body.

In the three-way solenoid valve having the above structure,
As described in claims 2 to 5, the urging member is arranged inside one of the two valve seat members, and one end of the urging member is brought into direct contact with the valve body, and the urging member is a wire rod. As a formed spring, a pin-shaped portion that comes into contact with the valve element is provided at one end thereof, and further, an annular portion at the other end of the spring is locked in an annular groove provided in the guide member, thereby facilitating assembly work and The size can be reduced.

Further, in order to reduce the number of types of constituent parts and reduce the cost, it is preferable that the both valve seat members have the same shape and size as described in claim 6.

In the three-way solenoid valve having the above structure,
In a normal state where the electric coil of the electromagnet is not energized, the valve member is disengaged from the first valve seat member by the biasing member to open the first through hole and to contact the second valve seat member. To close the second through hole to close the first
Port communicates with the second port, and the second port and the third port are disconnected. When the electric coil of the electromagnet is energized, the rod is propelled and the valve body is disengaged from the second valve seat member to open the second through hole and contact the first valve seat member. To close the first through hole, the second port communicates with the third port and the second port is disconnected from the first port.

Since each of the valve seat members is fixed to the body in a sealed state by the stopper portion, no seal member is required.

Since both the valve seat members, the spacer and the valve body are an assembly, it is easy to insert them into the medium diameter portion, and before the assembly is inserted into the small diameter portion. At each stage, the sealability between each valve seat member and the valve body and the flow rate when the valve body is separated from the valve seat member can be inspected, so the workability of the inspection is good and the inspection fails. In this case, it is sufficient to dispose of only this assembly, so that it can be economically produced.

[0011]

DETAILED DESCRIPTION OF THE INVENTION An embodiment of a three-way solenoid valve according to the invention of this application will be described with reference to the drawings.

FIG. 1 shows a vertical cross section of the first embodiment. Figure 1
11, a metal body 11 has a stepped cylinder hole 12 having a vertical axis and a first port 13 communicating with the small-diameter one end 12 a of the stepped cylinder hole 12.
A second port 14 communicating with the intermediate diameter intermediate portion 12b of the stepped cylinder hole 12 and a third port 15 communicating with the large diameter other end 12c of the stepping cylinder hole 12 are formed. There is.

Inside the upper bulging portion of the other end 12c of the stepped cylinder hole 12, the lower bulging portion of the fixed iron core 17 of the electromagnet 16 and the lower tapered portion of the sleeve 18 made of a non-magnetic material are arranged. The fixed core 17 and the sleeve 18 are fixed to the body 11 and the sleeve 18 and the body 11 are sealed by press-fitting the retaining ring 19 between the tapered portion of the sleeve 18 and the tapered portion of the body 11.

The electromagnet 16 includes a movable iron core 20 inside the sleeve 18, a coil-shaped spring 21 made of a wire rod for urging the movable iron core 20 upward, and an electric coil 22 arranged so as to surround the outside of the sleeve 18. And magnetic yoke members 23 and 24.

As shown in FIGS. 1 to 3, a metal first valve seat member 25, a metal second valve seat member 26, a metal are provided in the middle portion 12b of the stepped cylinder hole 12. An assembly 29 of a spacer 27 made of metal and a valve body 28 made of a spherical metal is arranged. The valve seat members 25 and 26 have the same shape and dimensions, and the valve seat members 25 and 26 have the same shape and size.
Has through holes 25a and 26a in the center. Reduced diameter portions 25b and 26 of the valve seat members 25 and 26
b is press-fitted inside the spacer 27. Spacer 2
7 has an outer diameter slightly smaller than the outer diameters of the valve seat members 25 and 26, and the middle diameter portion 12b of the stepped cylinder hole 12 is formed.
An annular passage 30 is formed between the annular passage 30 and the peripheral surface. Also valve body 2
Radial groove 27a reaching the outer diameter from the inner diameter of the portion where 8 is located
I have three. The passage 30 and the radial groove 27a ensure the communication between the second port 14 and the through holes 25a and 26a regardless of the circumferential position of the assembly 29.

After inserting the assembly 29 into the intermediate portion 12b, the stopper portion 11a formed by caulking the peripheral portion of the upper end portion of the intermediate portion 12b allows the lower surface of the valve seat member 25 and the intermediate diameter portion 12b to be formed. The lower end surface is sealed, the upper end outer periphery of the valve seat member 26 and the stopper 11a are sealed, and both valve seat members 25 and 26 are fixed to the body 11.

In one end 12a of the stepped cylinder hole 12, a biasing member 32 for biasing the valve body 28 upward by a force of a spring 31 is arranged so as to be vertically movable.
A rod 33 that pushes 8 downwardly against the urging force of the urging member 32 is arranged in the large diameter portion 12 c of the stepped cylinder hole 12. This rod 33 is a movable iron core 20 of the electromagnet 16.
When the electric coil 22 is energized, it is propelled downward by the electromagnet 16. In the other end 12c of the stepped cylinder hole 12, a guide 34 for guiding the rod 33 and a stop ring 35 for fixing the guide 34 are arranged. The stop ring 35 is fixed by caulking the peripheral wall of the other end 12c.

Next, the operation will be described. In a normal state where the electric coil 22 of the electromagnet 16 is not energized, the valve member 28 is disengaged from the valve seat member 25 by the biasing member 32 to open the through hole 25a and contact the valve seat member 26 to close the through hole 26a. Therefore, the port 13 communicates with the port 14 and the port 14 and the port 15 are blocked. When the electric coil 22 of the electromagnet 16 is energized, the rod 33 is propelled downward, the valve body 28 is disengaged from the valve seat member 26, and the through hole 26 is formed.
a is opened and brought into contact with the valve seat member 25 so that the through hole 25a
Port 14 is in communication with port 15 and port 14 and port 13 are closed to close port.

FIG. 4 shows a part of a vertical cross section of the second embodiment. The difference between the first embodiment and the second embodiment is that the second valve seat member 26 and the spacer are integrated and the valve seat member 25.
The coil-shaped spring 36 made of a wire rod accommodated therein urges the valve body 28 directly. The spring 34 has a pin-shaped portion 36a at its upper end, abuts on the valve body 28 at this pin-shaped portion 36a, and an annular portion 36b at its lower end is locked in an annular groove 25c formed in the valve seat member 25. ing.

A biasing member made of a plate material may be used instead of the spring 36.

[0021]

As described above, according to the invention of this application, the valve seat member is fixed to the body in a sealed state without using the seal member, and the space between the valve seat member and the valve body is fixed. It is possible to provide a three-way solenoid valve which is easy to inspect and seal and the flow rate when the valve body is separated from the valve seat member, and is easy to assemble.

[Brief description of drawings]

FIG. 1 is a longitudinal sectional view of a first embodiment of a three-way solenoid valve according to the invention of this application.

FIG. 2 is an enlarged view of a main part of FIG.

FIG. 3 is an exploded perspective view of a main part.

FIG. 4 is a vertical cross-sectional view of Embodiment 2 of the three-way solenoid valve according to the invention of this application.

[Explanation of symbols]

 11 ... Body 11a ... Stopping part 12 ... Stepped cylinder hole 13,14,15 ... Port 16 ... Electromagnet 25,26 ... Valve seat member 27 ... Spacer 28 ...・ Valve 29 ... Assembly 32 ... Biasing member 33 ... Rod 36 ... Biasing member

Claims (5)

[Claims] 1. A stepped cylinder hole and a first port, a second port and a third port which are in communication with one end, a medium diameter part and the other end of the stepped cylinder hole, respectively. And a first through hole arranged in the intermediate portion and fixed to the body, for communicating the first port and the second port with each other. A first valve seat member, a second through hole disposed in the intermediate portion and fixed to the body, for communicating the second port and the third port, and having a second through hole in a central portion; A second valve seat member, and a spacer that is arranged between the valve seat members and in which the reduced diameter portions of the valve seat members are press-fitted inward, and the spacer is arranged inside the spacer. And a valve for selectively closing one of the two through holes. An urging member that urges the valve body to close the second through hole; and the urging member disposed in the other end portion of the valve body against the urging force of the urging member. A rod for pushing so as to close the first through hole, an electromagnet including a movable iron core coupled to the rod, for propelling the rod by energizing an electric coil, the both valve seat members, It is formed by inserting the assembly of the spacer and the valve body into the medium diameter portion and then caulking the peripheral portion of the end portion of the intermediate portion, and fixing each valve seat member to the body in a sealed state. Three-way solenoid valve equipped with a stop. 2. The three-way solenoid valve according to claim 1, wherein the valve seat members have the same shape and size. 3. The three-way solenoid valve according to claim 1, wherein the biasing member is housed inside one of the two valve seat members, and one end of the biasing member directly contacts the valve body. A three-way solenoid valve that is in contact with. 4. The three-way electromagnetic valve according to claim 3, wherein the urging member is a spring formed of a wire rod, and has a pin-shaped portion that abuts against the valve body at one end thereof. A three-way solenoid valve characterized in that 5. The three-way solenoid valve according to claim 4, wherein an annular portion at the other end of the biasing member is locked in an annular groove formed in the one member. Three-way solenoid valve.