JPH0512859U - Spool valve - Google Patents

Abstract

(57) [Abstract] [Purpose] To facilitate the production of the flow path corresponding to the valve port of the mating mounting member to which the valve sleeve is assembled. [Constitution] On the outer circumference of the valve sleeve 5, a notch 16 connected to one of the two ports 8 and 9 and extending axially to the position of the other port 8 is provided.
It is characterized in that the output side flow path 13 and the supply side flow path 12 are coaxially provided so as to communicate with one of the output side flow paths 13 of the mating attachment member via 6.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a spool valve used for controlling various oils, pneumatic equipment, etc.

[0002]

[Prior Art]

 As a conventional spool valve of this type, for example, there is one as shown in FIG. 6 (see Japanese Utility Model Laid-Open No. 64-14969). That is, this spool valve is a three-way valve in which the spool 100 slides to switch the pressure, and the spool 100 is slidably inserted into the inner circumference of the guide hole 102 of the valve body 101. The valve body 101 has three ports, a second port 103 on the output side to the actuator, a first port 104 on the supply side to which pressure oil is supplied from a pressure source, and a third port 105 on the discharge side. The solenoid 100 is provided to reciprocate the spool 100 so that the pressure from the first port 104 is selectively supplied to the second port 103.

The valve body 101 has an output side flow in which the second port 103 and the first port 104 are open to the inner periphery of the mounting hole 107 in the mounting hole 107 of the mating mounting member 110 such as an engine cylinder head. It is assembled so as to match the channel 108 and the supply channel 109.

[0004]

[Problems to be solved by the device]

 However, in the case of the above-mentioned conventional technique, since the first port 104 and the second port 103 are axially separated from each other, the other side mounting member 110 side such as the cylinder head to which the valve body 101 is assembled is attached. However, there is a drawback that it is difficult to form the flow path. That is, conventionally, it is necessary to process the supply and output side flow paths 109 and 108 on the opposite side of the first port 104 and the second port 103 individually by changing their directions and positions, which causes interference with other parts in processing. However, it is often difficult to form the flow path.

The present invention has been made in order to solve the above-mentioned problems of the prior art, and an object of the present invention is to make a spool valve capable of facilitating the production of a flow path of a mating attachment member to which a valve body is assembled. To provide.

[0006]

[Means for Solving the Problems]

 In order to achieve the above object, in the present invention, a valve body having a guide hole inside, a spool slidably inserted into the inner circumference of the guide hole of the valve body, and a central shaft of the valve body are provided. And two ports which are provided on opposite sides of each other and are separated from each other in the axial direction and are selectively communicated by the movement of the spool, the valve body is provided in a mounting hole of a mating mounting member, In a spool valve assembled so that the two ports match the flow path opening to the inner circumference of the mounting hole, one of the two ports is connected to the outer circumference of the valve body and corresponds to the other port in the axial direction. A passage extending to the position is provided, and one passage of the mating attachment member and one port communicate with each other through the passage.

[0007]

[Action]

 In the spool valve having the above-described structure, the passages of the mating attachment members corresponding to the two ports are coaxially provided, and if one port is aligned with the one passage, the passage is through the passage. The other port will communicate with the other flow path. Therefore, the flow path of the mating attachment member need only be coaxially provided at one place.

[0008]

【Example】

 The present invention will be described below based on the illustrated embodiment. 1 to 3 showing a spool valve according to an embodiment of the present invention, reference numeral 1 denotes a spool valve body. In this embodiment, a spool 2 is driven by using an electromagnetic attraction force of a solenoid 3, It consists of a solenoid valve that switches the pressure supply to the actuator side.

The spool valve 1 includes a spool 2, a valve sleeve 5 as a valve body having a guide hole 4 into which the spool 2 is inserted, and a solenoid 3 for reciprocating the spool 2. The valve sleeve 5 is inserted and fixed in a mounting hole 7 of a mating mounting member 6 such as a cylinder head.

The valve sleeve 5 has three ports, a first port 8, a second port 9 and a third port 10. Of these, the third port 10 is provided at the end opening of the valve sleeve 5 and communicates with the discharge side flow passage 11 of the mating attachment member 6. Further, the first port 8 and the second port 9 are provided on the cylindrical side wall and communicate with the supply-side flow passage 12 and the output-side flow passage 13 of the mating attachment member 6, respectively. The first port 8 and the second port 9 are provided on opposite sides to the central axis of the valve sleeve 5 and at positions axially separated from each other.

On the other hand, an annular concave groove 14 is provided on the outer periphery of the spool 2, the first port 8 on the supply side is always open to face the concave groove 14, and the second port 9 on the output side is Whether the fluid from the output side flow passage 13 is made to flow to the discharge side flow passage 11 by opening and closing by the land portion 15 on the tip side of the concave groove 14 of the spool 2 and connecting the second port 9 and the third port 10 It is switched whether the second port 9 and the first port 8 are communicated with each other through the groove 14 to supply the pressure from the supply side flow passage 12 to the output side flow passage 13.

On the outer circumference of the valve sleeve 5, one of the two first ports 8 and the second port 9, in this embodiment, one end is connected to the second port 9 on the output side, and the other end is in the axial direction. Is provided with a notch 16 as a passage extending to a position corresponding to the first port 8 on the other supply side. Then, the second port 9 and one of the mating side attachment members 6, that is, the output side flow path 13 in this embodiment are communicated with each other through the notch 16. The supply-side flow path 12 and the output-side flow path 13 of the mating mounting member 6 are formed coaxially. Therefore, if the mating supply-side flow passage 12 and the first port 8 of the valve sleeve 5 are matched, the other end of the notch 16 is matched with the mating output-side flow passage 13.

Here, the solenoid 3 as an electromagnetic actuator that reciprocally drives the spool 2 will be briefly described. The solenoid 3 is integrally assembled with the valve sleeve 5. That is, the solenoid 3 has a cylindrical core 17 that functions as a fixed iron core, one end of which faces the inside of the valve sleeve 5, a coil 18 that surrounds the core 17, and a core on the inner circumference of the coil 18. A plunger 19 coaxially inserted into the coil 17 for reciprocating movement, a case 20 for accommodating the coil 18, and a connector 21 for energizing the coil 18 are provided. A rod 22 is reciprocally inserted into the core 17, one end of the rod 22 is connected to a plunger 19 inside the solenoid, and the other end is connected to the spool 2 inside the valve sleeve 5.

Inside the valve sleeve 5, there is provided a spring 23 for urging the spool 2 toward the solenoid 3, and when the solenoid 3 is off, the spool 2 and the rod 22 are driven by the spring force of the spring 23. The plunger 19 is separated from the core 17 via the through hole, and the output side flow path 13 and the discharge side flow path 11 are in communication with each other as shown in FIG.

On the other hand, when the solenoid 3 is turned on, the plunger 19 is magnetically attracted to the core 17 against the spring force of the spring 22, and the spool 2 is moved via the rod 22, as shown in FIG. , The second port 9 and the third port 10 are closed, the first port 8 and the second port 9 are opened, and a fluid pressure such as hydraulic pressure is supplied from the supply side flow passage 12 to the output side flow passage 13.

In the spool valve configured as described above, even if the first and second ports 8 and 9 formed on the side surface of the valve sleeve 5 are axially displaced, the output from the second port 9 and the output through the notch 16 By connecting the side flow path 13 to each other, the supply side flow path 12 and the output side flow path 13 on the opposite side can be arranged coaxially. Therefore, the output-side flow path 13 and the supply-side flow path 12 can be processed at the same time, which makes the manufacturing extremely easy and simplifies the layout of the piping.

4 and 5 show another embodiment of the present invention. In the above embodiment, the notch 16 is provided in the second port 9 on the output side of the valve sleeve 5, but in this embodiment, the notch 24 as a passage is provided in the first port 8 on the supply side. Since other configurations and operations are the same as those of the first embodiment, the same components are designated by the same reference numerals and the description thereof will be omitted.

In each of the above-mentioned embodiments, the solenoid 3 is used as the drive means for the spool 2, but the means for driving the spool 2 is not limited to the solenoid, and other hydraulic pressure and the like may be used. The same can be applied to those utilizing the fluid pressure of.

[0019]

[Effect of the device]

 The present invention has the above-described configuration and operation, and since the notch which is connected to one port and extends to the position of the other port is provided on the outer periphery of the valve body having two ports, it corresponds to the counterpart mounting member. Since it is only necessary to arrange the two flow paths on the same axis, it is possible to process the two flow paths at the same time, which facilitates the piping layout and production.

[Brief description of drawings]

FIG. 1 is an overall vertical cross-sectional view of a spool valve according to an embodiment of the present invention.

FIG. 2 is a longitudinal sectional view of a main part of the spool valve of FIG. 1 in a switched state.

3 is a cross-sectional view taken along the line AA of FIG.

FIG. 4 is a vertical cross-sectional view of a spool valve according to another embodiment of the present invention.

5 is a cross-sectional view taken along the line BB of FIG.

FIG. 6 is a vertical sectional view of a conventional spool valve.

[Explanation of symbols]

 1 Spool Valve 2 Spool 3 Solenoid 4 Guide Hole 5 Valve Sleeve 6 Counterpart Mounting Member 7 Mounting Hole 8 First Port 9 Second Port 10 Third Port 11 Discharge Side Flow Path 12 Supply Side Flow Path 13 Output Side Flow Path 14 Recess Groove 15 Land portion 16 Notch (passage) 17 Core 18 Coil 19 Plunger 20 Case 21 Connector 22 Rod 23 Spring 24 Notch (passage)

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[Procedure amendment]

[Submission date] August 12, 1992

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be corrected] Figure 6

[Correction method] Delete

Claims (1)

[Scope of utility model registration request] 1. A valve body having a guide hole inside, a spool slidably inserted into an inner circumference of the guide hole of the valve body, and an axial direction opposite to a central axis of the valve body. And two ports provided separately from each other and selectively communicating with each other by movement of the spool, wherein the valve body opens in a mounting hole of a mating mounting member, and the two ports open in an inner circumference of the mounting hole. In a spool valve assembled so as to match a flow passage, a passage that is connected to one of the two ports and extends axially to a position corresponding to the other port is provided on the outer periphery of the valve body, and the passage is provided through the passage. A spool valve characterized in that one flow path of the mating attachment member and one port are communicated with each other.