JP3635725B2 - 3-way solenoid valve - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The invention of this application relates to a three-way electromagnetic valve used for a brake hydraulic pressure control valve of a hydraulic brake device for a vehicle.
[0002]
[Prior art]
In recent years, costs have been reduced by reducing the number of components in the technical field of solenoid valves. In WO 93-8051, in a two-way solenoid valve, after inserting a valve seat member into a small diameter portion of a stepped cylinder hole of a body, the valve seat member is made into a body by caulking around the end of the small diameter portion. After fixing the expanded end of the fixed core of the electromagnet and the expanded end of the sleeve into which the fixed core is inserted into the intermediate diameter of the stepped cylinder hole, the end of the intermediate diameter is fixed. It is disclosed that the fixed iron core and the sleeve are fixed to the body in a sealed state by caulking the periphery of the body. According to this technique, a sealing member between the body and the valve seat member and a sealing member between the body, the fixed iron core, and the sleeve are not necessary.
[0003]
[Problems to be solved by the invention]
However, the above-mentioned conventional device performs an inspection to check whether the flow characteristics when the valve body is detached from the valve seat member and the seal characteristics when the valve body is seated on the valve seat satisfy the standards. This can only be done in the state of the assembly, and it cannot be said that the workability of the inspection is good, and if it fails, there is a problem that the whole solenoid valve assembly is disposed of and is uneconomical.
[0004]
In the invention of this application, the valve seat member is fixed in a sealed state with respect to the body without using a seal member, and the sealability between the valve seat member and the valve body and the state in which the valve body is detached from the valve seat member It is an object of the present invention to provide a three-way solenoid valve that can be easily inspected for flow rate and can be easily assembled.
[0005]
[Means for Solving the Problems]
The three-way solenoid valve according to the invention of the present application in accordance with the above object is, as described in claim 1, a stepped cylinder hole and a first portion, an intermediate portion, and the other end portion of the stepped cylinder hole that communicate with each other. A body in which one port, a second port, and a third port are formed, and is disposed in the intermediate portion and fixed to the body, and communicates the first port and the second port A first valve seat member having a first through hole in the center, a second valve seat member disposed in the intermediate portion and fixed to the body, the second port and the third port A second valve seat member having a second through hole at the center for communicating with the valve seat member, and a reduced diameter portion of each of the two valve seat members. A spacer that is press-fitted inside, and is arranged inside the spacer. A valve body for selectively closing either one of the two through holes, a biasing member for biasing the valve body to close the second through hole, and the other end portion. A rod for pushing the valve body so as to close the first through-hole against the urging force of the urging member, and a movable iron core coupled to the rod, an electromagnet for propelling the rod by energization of the said two valve seat member, by caulking the peripheral portion of the end portion of the intermediate portion after the assembly of said spacer and said valve body is inserted into the middle portion It is formed and provided with the stop part which fixes each said valve-seat member in the sealing state with respect to the said body.
[0006]
In the three-way solenoid valve configured as described above, as described in claims 2 to 5, the urging member is disposed inside one of the two valve seat members and directly contacts the valve body at one end thereof. Furthermore, a pin-shaped part that contacts the valve body is provided at one end of the urging member as a spring formed of a wire rod, and the annular part at the other end of the spring is further engaged with an annular groove provided in the guide member. By stopping, assembly work can be facilitated and reduced in size.
[0007]
Further, in order to reduce the cost by reducing the types of components, it is preferable that both the valve seat members have the same shape and dimensions as described in claim 6.
[0008]
In the three-way solenoid valve configured as described above, in a normal state where no electric coil is energized, the urging member causes the valve body to be detached from the first valve seat member to open the first through hole. And the first port communicates with the second port and contacts the second valve seat member to close the second through hole, and the second port and the third port. And are cut off. When the electric coil of the electromagnet is energized, the rod is propelled to disengage the valve body from the second valve seat member, open the second through hole, and contact the first valve seat member. In order to close the first through hole, the second port communicates with the third port, and the second port and the first port are blocked.
[0009]
Since each valve seat member is fixed in a sealed state with respect to the body by the stopper, a seal member is unnecessary.
[0010]
Since both the valve seat member, the spacer, and the valve body are an assembly, it is easy to insert them into the intermediate portion , and each stage before the assembly is inserted into the small diameter portion. Since the sealing performance between the valve seat member and the valve body and the flow rate when the valve body is detached from the valve seat member can be inspected, the workability of the inspection is good, and when the inspection fails Can be produced economically because only this assembly needs to be disposed of.
[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.
[0012]
FIG. 1 shows a longitudinal section of the first embodiment. In FIG. 1, 11 is a metal body, a stepped cylinder hole 12 having an axis in the vertical direction, a first port 13 communicating with one end portion 12a of the stepped cylinder hole 12, and a stepped cylinder hole. A second port 14 that communicates with the middle diameter intermediate portion 12 b of the cylinder hole 12 and a third port 15 that communicates with the large diameter other end portion 12 c of the stepped cylinder hole 12 are formed.
[0013]
A lower expanded portion of the fixed iron core 17 of the electromagnet 16 and a lower tapered portion of a non-magnetic sleeve 18 are arranged in the upper expanded portion of the other end portion 12 c of the stepped cylinder hole 12. By inserting a retaining ring 19 between the taper portion and the taper portion of the body 11, the fixed iron core 17 and the sleeve 18 are fixed to the body 11 and the space between the sleeve 18 and the body 11 is sealed.
[0014]
The electromagnet 16 includes a movable iron core 20 in the sleeve 18, a coiled spring 21 made of a wire material that urges the movable iron core 20 upward, an electric coil 22 arranged so as to surround the outside of the sleeve 18, and a magnetic Body yoke members 23 and 24 are included.
[0015]
As shown in FIGS. 1 to 3, a metal first valve seat member 25, a metal second valve seat member 26, and a metal spacer are disposed in the intermediate portion 12 b of the stepped cylinder hole 12. 27 and an assembly 29 of spherical metal valve bodies 28 are arranged. The valve seat members 25 and 26 have the same shape and dimensions, and the valve seat members 25 and 26 have through holes 25a and 26a in the center. The reduced diameter portions 25 b and 26 b of the valve seat members 25 and 26 are press-fitted inside the spacer 27. The spacer 27 has an outer diameter that is slightly smaller than the outer diameters of the valve seat members 25 and 26, and forms an annular passage 30 between the spacer 27 and the peripheral surface of the intermediate portion 12 b of the stepped cylinder hole 12. Further, there are three radiation grooves 27a that reach the outer diameter from the inner diameter of the portion where the valve body 28 is located. The passage 30 and the radiation groove 27a ensure communication between the second port 14 and the through holes 25a and 26a regardless of the circumferential position of the assembly 29.
[0016]
After the assembly 29 is inserted into the intermediate portion 12b, the stopper 11a formed by caulking the peripheral portion of the upper end portion of the intermediate portion 12b causes the lower surface of the valve seat member 25 and the lower end surface of the intermediate portion 12b to The space is sealed, the space between the outer periphery of the upper end portion of the valve seat member 26 and the stopper portion 11 a is sealed, and both valve seat members 25 and 26 are fixed to the body 11.
[0017]
A biasing member 32 that biases the valve body 28 upward by the force of the spring 31 is disposed in the one end portion 12a of the stepped cylinder hole 12 so as to be movable up and down. A rod 33 that is pushed downward against the bias is disposed in the other end portion 12 c of the stepped cylinder hole 12. The rod 33 is coupled to the movable iron core 20 of the electromagnet 16 and is pushed downward by the electromagnet 16 when the electric coil 22 is energized. 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 disposed. The retaining ring 35 is fixed by caulking the peripheral wall of the other end portion 12c.
[0018]
Next, the operation will be described. In a normal state where the electric coil 22 of the electromagnet 16 is not energized, the urging member 32 causes the valve body 28 to be detached from the valve seat member 25 to open the through hole 25a and to 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 pushed downward, the valve body 28 is detached from the valve seat member 26 to open the through hole 26a, and is brought into contact with the valve seat member 25 to pass through the through hole 25a. To close, port 14 communicates with port 15 and ports 14 and 13 are blocked.
[0019]
FIG. 4 shows a part of a longitudinal section of the second embodiment. The difference between the second embodiment and the second embodiment is that the second valve seat member 26 and the spacer are integrated, and a coiled spring 36 made of wire housed in the valve seat member 25 directly connects the valve body 28. It is in the point to be energized. The spring 34 has a pin-shaped portion 36 a at the upper end thereof, abuts against the valve body 28 by the pin-shaped portion 36 a, and the annular portion 36 b at the lower end thereof is locked in an annular groove 25 c formed in the valve seat member 25. ing.
[0020]
Instead of the spring 36, an urging member made of a plate material may be used.
[0021]
【The invention's effect】
As described above, according to the invention of this application, the valve seat member is fixed in a sealed state with respect to the body without using the seal member, and the sealing property and valve between the valve seat member and the valve body are fixed. It is possible to provide a three-way solenoid valve that is easy to inspect for the flow rate when the body is detached from the valve seat member and is easy to assemble.
[Brief description of the 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 longitudinal sectional view of Embodiment 3 of a three-way solenoid valve according to the invention of this application.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 11 ... Body 11a ... Stop 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)

A body in which a stepped cylinder hole and a first port, a second port, and a third port communicating with one end portion, an intermediate portion, and the other end portion of the stepped cylinder hole are formed; and in the intermediate portion And a first valve seat member having a first through hole at the center for communicating the first port and the second port, and fixed to the body, A second valve seat member disposed in an intermediate portion and fixed to the body, and having a second through hole for communicating the second port and the third port at a central portion; The spacers are disposed between the valve seat members, and the respective diameter-reduced portions of the valve seat members are press-fitted inside, and the spacers are disposed inside the spacers. A valve body for selectively closing one of the valves, and the valve body in the second A biasing member that biases the hole to be closed, and a valve member disposed in the other end portion to push the valve body against the biasing of the biasing member so as to close the first through hole. A rod for moving, a movable iron core coupled to the rod, an electromagnet for propelling the rod by energizing an electric coil, and the assembly of the valve seat members, the spacer and the valve body is formed by caulking the peripheral portion of the end portion of the intermediate portion after insertion into the middle part, three-way solenoid valve having a stopper portion fixed to the sealing state the respective valve seat member relative to said body. The three-way solenoid valve according to claim 1, wherein the both valve seat members have the same shape and dimensions. 2. The three-way solenoid valve according to claim 1, wherein the urging member is accommodated in one of the two valve seat members, and is in direct contact with the valve body at one end thereof. A three-way solenoid valve characterized by that. 4. The three-way solenoid valve according to claim 3, wherein the biasing member is a spring formed of a wire, and has a pin-like portion that comes into contact with the valve body at one end thereof. Three-way solenoid valve. 5. The three-way solenoid valve according to claim 4, wherein an annular portion at the other end of the biasing member is engaged with an annular groove formed in the one member.

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