JP2018132074A - Directional control valve - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a directional control valve capable of reducing the pressure loss caused by leakage of fluid, and capable of simplifying a configuration.SOLUTION: A directional control valve includes: spherical valve elements 31, 32 which are arranged respectively in large diameter portions 1002, 1004, and are separated from seal surfaces 612, 1112, 1114, and 522 so as to open a flow passage opened and communicated in the seal surfaces 612, 1112, 1114, and 522, or are abutted to the seal surfaces 612, 1112, 1114, and 522 so as to close the flow passage opened and communicated in the seal surfaces 612, 1112, 1114, and 522; and an intermediate body 41 which is movably arranged in a center small diameter portion 1003, forms a flow passage 1023 in the center small diameter portion 1003, and can be abutted to the valve elements 31, 32.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a directional control valve.

  2. Description of the Related Art Conventionally, a multi-way valve having a spool valve is known as a multi-way valve having two or more discharge ports and three or more ports communicating with the two or more discharge ports. In such a multi-way valve, the flow path is switched by a spool valve.

  Moreover, a poppet type multi-way valve is known as a direction switching valve (see, for example, Patent Document 1). In the direction switching valve, a flow path is formed in the movable member constituting the poppet valve, and the discharge passage is connected. In such a configuration, since a plurality of conical surfaces are sealed at the same time, sealing materials such as rubber are attached to both ends of the valve and the valve seat by baking or the like.

  Further, as a multidirectional switching valve, a control valve configured by a 5-port electromagnetic switching valve using a valve element configured by a steel ball is known (for example, see Patent Document 2). The control valve has a valve sleeve in which a plurality of ports are formed, three steel balls, and a total of two rods arranged one by one between these three steel balls. A steel ball disposed at one end is driven by a rod driven by a solenoid, and a plurality of valve seats are sealed at the same time so that the ports communicate with each other. With such a configuration, pressure loss can be reduced, and the apparatus can be reduced in size and control can be simplified.

JP-A-61-96272 JP 9-26039 A

  In a conventional multi-way valve having a spool valve, leakage occurs between adjacent ports due to the clearance of the seal portions between lands, and pressure loss occurs.

  In the directional switching valve described in Patent Document 1, since a sealing material such as rubber must be baked on the valve seat, the manufacturing process becomes complicated, and the rubber is sealed with the annular valve seat. Pressure leakage occurs due to deterioration of durability.

  Further, in the control valve described in Patent Document 2, since a plurality of valve seats are sealed at the same time, it is required that a plurality of parts with extremely high dimensional accuracy be assembled in a complicated manner to the components for sealing. With such a configuration, the product becomes large and the cost increases.

  An object of the present invention is to provide a directional control valve in which pressure loss due to fluid leakage is reduced and the configuration is simplified.

  In order to achieve the above object, the present invention is formed with a guide hole (for example, a guide hole 100 described later) extending therein, and the guide hole includes a central small diameter portion (for example, a central small diameter portion 1003 described later), A large-diameter portion (for example, large-diameter portions 1002, 1004 described later) communicating with the central small-diameter portion at one end and the other end of the central small-diameter portion, and an end-side small-diameter portion respectively communicating with the large-diameter portion (for example, A plurality of ports (for example, a port D1, a port D2, a port I1, a port O1, and a port O2 described later) having a base end side small diameter portion 1001 and a distal end side small diameter portion 1005 described later. ) And a central valve seat (for example, a later-described valve seat 11) having annular seal surfaces (for example, a later-described seal surface 1112 and a seal surface 1114) located at both ends of the center small diameter portion. 1, the valve seat 1113) and the end side having an annular seal surface (for example, a seal surface 522 and a seal surface 612, which will be described later) located at the end of the end side small diameter portion communicating with the large diameter portion A valve seat (for example, a valve seat 521 and a valve seat 611, which will be described later) and the large-diameter portion, respectively, are spaced apart from the seal surface, and are open or communicated with the seal surface to release the flow path. Alternatively, a spherical valve body (for example, a valve body 31 and a valve body 32 described later) that contacts the seal surface and closes a flow path that opens and communicates with the seal surface, and moves in the central small diameter portion. An intermediate body (for example, an intermediate body 41 described later) that can be disposed and forms a flow path in the central small diameter portion and can contact the valve body, and one end-side small diameter portion (for example, a later described later) The base end side small diameter portion 1001) is movably disposed, A first end side contact member (for example, a plunger 63 described later) that can contact a valve body (for example, a valve body 32 described later) and the other end side small diameter portion (for example, a distal end portion described later). A second end-side abutting member (for example, a later-described distal end support 51 described later) that is movably disposed in the side small-diameter portion 1005) and that can abut on the valve body (for example, a later-described valve body 31); A drive unit (e.g., a solenoid unit 60 described later) that drives the valve body via the first end side contact member, and the central small diameter portion includes one port (e.g., described later). Port I1) is formed, and one port is formed in each of the large-diameter portions (for example, port O1 and port O2 described later), and the end-side small-diameter portion is opposite to the large-diameter portion. The valve body part of each of the ports (for example, a port described later) D1 and port D2) are provided (for example, solenoid valve 1 and multi-way valve 1A described later).

Thereby, since a spherical valve body is used, the spool valve is not used. For this reason, the pressure loss by the leakage which generate | occur | produced in the spool valve is suppressed.
In addition, since the two valve bodies and the intermediate body arranged between the two valve bodies are arranged in the guide holes of the valve body, the configuration of the direction control valve can be simplified. It is easy to reduce the size. Further, since the valve body can be constituted by an integral structure, that is, by a single component, it can be incorporated into the hydraulic control body as a multi-way valve.

  In addition, when a fluid flows in from one port formed in the central small diameter portion, an original pressure due to the inflow of the fluid acts on one of the valve bodies, so that the two valve bodies seal the valve seat. It is possible to vary the force for sealing the surfaces. Thereby, extremely high dimensional accuracy is not required for the length of the intermediate body 41, and a plurality of sealing surfaces can be sealed without requiring an elastic body such as rubber for the seating surface.

  The first end-side contact member is a valve body pressing member that is movably disposed in the end-side small-diameter portion, and a flow path (for example, a flow path described later) in the end-side small-diameter portion. 1022 and a flow path 1024), and is preferably configured by a valve body pressing member (for example, a plunger 63 described later) that can contact the valve body.

  For this reason, the flow path connected to the port formed one by one in the part of the valve main body on the opposite side to the large diameter portion with respect to the small diameter portion on the end side is ensured. For this reason, it becomes possible to distribute | circulate a fluid to these ports, and it becomes possible to implement | achieve a 5-way valve with a simple structure.

  The end-side small-diameter portion is a small-diameter portion forming member that is formed of a member different from the valve main body and is fixed to the valve main body (for example, a distal end tubular portion 52 and a proximal end tubular portion 65A described later). It is formed by.

  For this reason, it becomes possible to process the sealing surfaces of the end side valve seat and the central side valve seat in advance on the small diameter portion forming member, and thereafter fix the small diameter portion forming member to the valve body. For this reason, it becomes possible to process the sealing surface of the valve seat accurately and easily.

The drive unit is configured by a solenoid (for example, a solenoid unit 60 described later).
For this reason, by driving the solenoid, it is possible to easily move the valve body and switch the opening / closing of the flow path in the guide hole.

Moreover, the said drive part is comprised by the apparatus which drives the said valve body with signal oil.
For this reason, the valve body can be easily moved by the operating oil pressure of the signal oil, and the opening / closing of the flow path in the guide hole can be switched.

  According to the present invention, it is possible to provide a directional control valve in which pressure loss due to fluid leakage is reduced and the configuration is simplified.

It is sectional drawing which shows the solenoid valve comprised by the direction control valve which concerns on 1st Embodiment of this invention. It is sectional drawing which shows the state in which the solenoid valve comprised by the direction control valve which concerns on the said embodiment is OFF. It is sectional drawing which shows the state in which the solenoid valve comprised by the direction control valve which concerns on the said embodiment is ON. It is sectional drawing which shows the state in which the multiway valve comprised by the direction control valve which concerns on 2nd Embodiment is OFF. It is sectional drawing which shows the state in which the multiway valve comprised by the direction control valve which concerns on the said embodiment is ON.

[First Embodiment]
Hereinafter, a first embodiment of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a cross-sectional view showing a solenoid valve 1 including a directional control valve according to a first embodiment of the present invention. FIG. 2 is a cross-sectional view showing a state where the electromagnetic valve 1 constituted by the directional control valve is OFF. FIG. 3 is a cross-sectional view showing a state where the electromagnetic valve 1 constituted by the direction control valve is ON.
In the following description, the distal end side (left side in FIGS. 1 to 3) of the electromagnetic valve 1 is defined as “front end side”, and the proximal end side (right side in FIGS. 1 to 3) of the electromagnetic valve 1 is defined as “proximal end”. It is defined as “side”.

  The direction control valve in the present embodiment constitutes the electromagnetic valve 1 having the solenoid unit 60. The electromagnetic valve 1 includes a valve body 10, a valve body 31, a valve body 32, an intermediate body 41, a tip end support 51, and a solenoid unit 60 as a drive unit for driving the valve bodies 31 and 32. I have.

  The solenoid unit 60 includes a solenoid unit housing 61, a coil 62 housed in the solenoid unit housing 61, and a plunger 63 disposed at the axial center position of the coil 62. Electricity is supplied to the coil 62, and the plunger 63 moves forward (moves to the left in FIG. 1) along the axial direction of the plunger 63 by the magnetic force generated in the coil 62. Further, when the supply of electricity to the coil 62 is stopped, the plunger 63 moves backward (moves to the right in FIG. 1) along the axial direction of the plunger 63.

  The valve body 10 has a substantially cylindrical shape integrally formed. A plurality of grooves 101 that extend in the circumferential direction of the valve body 10 and make one round are formed in the circumferential surface of the valve body 10 at predetermined intervals in the axial direction of the valve body 10, and one groove is formed in each groove 101. The O-ring 102 is fitted. The O-ring 102 seals between the wall portion W (see FIG. 2 and the like) that supports the electromagnetic valve 1 and the valve body 10.

  The space formed inside the valve main body 10 includes a proximal end side small diameter portion 1001, a large diameter portion 1002, a central small diameter portion 1003, a large diameter portion 1004, and a distal end side small diameter portion 1005 in this order. A communicating guide hole 100 is formed. A port D <b> 1 configured by an opening communicating with the guide hole 100 is formed at the distal end portion of the valve body 10.

  A proximal end portion of the valve main body 10 extending to the solenoid portion 60 has a flange portion 103. The inner diameter of the base end portion of the valve body 10 having the flange portion 103 is larger than the portion forming the large diameter portion 1002 on the distal end side of the valve body 10 than that portion, and constitutes the flange portion large diameter portion 1006. . A tip portion of the substantially cylindrical support member 631 that supports the plunger 63 of the solenoid portion 60 (the left end portion of the support member 631 shown in FIG. 1) is engaged with the step portion whose inner diameter is increased by one step. Further, on the tip side of the stepped portion, a port D2 (FIG. 2 etc.) that communicates the space inside the cylindrical tip portion of the solenoid housing 61 that communicates with the guide hole 100 and the outside of the valve body 10. Reference) is formed. The internal space of the distal end portion of the solenoid housing 61 constitutes a proximal end side small diameter portion 1001 having a smaller diameter than the large diameter portion 1002 of the guide hole 100. That is, the port D <b> 2 is formed in the portion of the valve body 10 on the side opposite to the large diameter portion 1002 with respect to the proximal end side small diameter portion 1001. The plunger 63 of the solenoid unit 60 is inserted through the proximal end side small diameter portion 1001.

  The internal space at the tip of the solenoid housing 61 is open at the tip of the solenoid housing 61, and the internal space and the large diameter portion 1002 constitute a flow path that communicates with the opening. The peripheral edge portion of the opening constitutes an end-side valve seat 611 having an annular seal surface 612 and can contact the valve body 32. In addition, a fluid flow path 1022 is formed between the plunger 63 and the inner peripheral surface of the distal end portion of the solenoid housing 61 in the base end side small diameter portion 1001, and fluid can flow through the flow path 1022. It is. The plunger 63 can project from the opening at the distal end of the solenoid housing 61 to the distal end side (left side in FIG. 1) of the solenoid valve 1 and can contact the valve body 32.

  The portion of the large-diameter portion 1002 of the guide hole 100 on the tip side of the solenoid valve 1 communicates with the central small-diameter portion 1003, and forms a portion from the large-diameter large-diameter portion 1002 to the small-diameter central small-diameter portion 1003. The part of the valve main body 10 that is provided constitutes a step portion. That is, the central small diameter portion 1003 is opened at this step portion with respect to the large diameter portion 1002, and the central small diameter portion 1003 and the large diameter portion 1002 constitute a flow path communicating with the opening. The peripheral edge portion of the opening constitutes an end-side valve seat 1111 having an annular seal surface 1112, and can contact the valve body 32. A valve body 32 having a spherical shape made of steel is disposed in the large diameter portion 1002.

  The valve body 32 is movable in the large diameter portion 1002 in the movement direction (left and right direction in FIG. 1) of the plunger 63 of the electromagnetic valve 1, and is pushed to the distal end side by the distal end portion of the plunger 63, thereby causing the valve seat 611. The fluid flow path is opened at the seal surface 612 at a distance from the seal surface 612, and the fluid flow path is closed by contacting the seal surface 1112 of the valve seat 1111. Further, the valve body 32 is separated from the seal surface 1112 of the valve seat 1111 by opening the plunger 63 backward (the plunger 63 moves to the right side in FIG. 1), and the fluid flow path is opened at the seal surface 1112. Then, the fluid flow path is closed by contacting the sealing surface 612 of the valve seat 611. A port O1 (see FIG. 2 and the like) that connects the inside and the outside of the valve body 10 is formed in the portion of the valve body 10 that forms the large diameter portion 1002 of the guide hole 100.

  An intermediate body 41 is disposed in the central small diameter portion 1003 of the guide hole 100. The intermediate body 41 is movable in the central small diameter portion 1003 in the moving direction of the plunger 63 of the electromagnetic valve 1 (left and right direction in FIG. 1), and the valve body 32 is moved to the distal end side of the electromagnetic valve 1 by the distal end portion of the plunger 63 ( 1 is pushed to the left side in FIG. 1, the valve body 32 comes into contact with the intermediate body 41, and the intermediate body 41 is also pushed by the valve body 32 and comes into contact with the valve body 31. Press to. A fluid channel 1023 is formed between the intermediate body 41 and the valve body 10 forming the center small diameter portion 1003 in the center small diameter portion 1003, and the fluid can flow through the channel 1023. A port I1 that communicates the inside and the outside of the valve body 10 is formed in the portion of the valve body 10 that forms the central small diameter portion 1003 of the guide hole 100.

  The central small-diameter portion 1003 of the guide hole 100 on the distal end side of the solenoid valve 1 communicates with the large-diameter portion 1004, and this communicating portion is a portion from the small-diameter central small-diameter portion 1003 to the large-diameter large-diameter portion 1004. The step part of the valve body 10 is formed. That is, the central small diameter portion 1003 is open at this step with respect to the large diameter portion 1004, and the central small diameter portion 1003 and the large diameter portion 1004 constitute a flow path communicating with the opening. The peripheral edge of the opening constitutes an end-side valve seat 1113 having an annular seal surface 1114 and can contact the valve body 31. A valve body 31 having a spherical shape made of steel is disposed in the large diameter portion 1004.

  The valve body 31 is movable in the large diameter portion 1004 in the moving direction of the plunger 63 of the electromagnetic valve 1 (left and right direction in FIG. 1), and is pushed toward the distal end side of the electromagnetic valve 1 by the end portion of the intermediate body 41. Thus, the fluid flow path that opens and communicates with the seal surface 1114 apart from the seal surface 1114 of the valve seat 1113 is opened, and a fluid surface in the guide hole 100 is in contact with a seal surface 522 of the valve seat 521 described later. Close the flow path. When the intermediate body 41 moves backward (the intermediate body 41 moves to the right side in FIG. 1), the fluid passage that opens and communicates with the seal surface 522 apart from the seal surface 522 of the valve seat 521 is opened. The fluid flow path in the guide hole 100 is closed by contacting the seal surface 1114 of the valve seat 1113. Further, a port O <b> 2 that connects the inside and the outside of the valve body 10 is formed in the portion of the valve body 10 that forms the large diameter portion 1004 of the guide hole 100.

  The inner diameter of the distal end portion of the valve body 10 corresponding to the distal end portion of the electromagnetic valve 1 is a portion closer to the proximal end of the valve body 10 than that portion and larger in diameter than the portion forming the large diameter portion 1004 of the guide hole 100. The distal end portion large diameter portion 1007 is formed. The base end side end portion of the cylindrical distal end cylindrical portion 52 is fitted and fixed to the step portion whose inner diameter is increased by one step. The inner diameter of the end cylindrical portion 52 on the proximal end side of the solenoid valve 1 (the right end portion of the distal cylindrical portion 52 in FIG. 1) is smaller than the inner diameter of the large diameter portion 1004. In this portion, a distal end side small diameter portion 1005 that is an internal space of the distal end cylindrical portion 52 opens toward the large diameter portion 1004, and the distal end side small diameter portion 1005 and the large diameter portion 1004 correspond to the opening. Constitutes a flow path communicating with each other. The peripheral edge of the opening constitutes an end-side valve seat 521 having an annular seal surface 522 and can contact the valve body 31.

  The tip support 51 includes a head 511 having a small outer diameter and inner diameter, and a leg 512 integrally formed with the head 511. The outer diameter of the leg portion 512 is larger than the outer diameter of the head portion 511, and the inner diameter of the leg portion 512 is larger than the outer diameter of the head portion 511. The outer peripheral surface of the leg portion 512 is configured to slide with respect to the inner peripheral surface of the distal end tubular portion 52. The head portion 511 of the distal end support 51 is inserted through the distal end side small diameter portion 1005 and protrudes from the opening of the distal end tubular portion 52 toward the proximal end side (right side in FIG. 1) of the solenoid valve 1. Is possible. A fluid flow path 1024 is formed between the head portion 511 of the distal end support 51 in the distal end side small diameter portion 1005 and the portion of the distal end cylindrical portion 52 forming the distal end side small diameter portion 1005. The fluid can flow through the flow path 1024. A splashing step is formed in a portion where the head portion 511 is connected to the leg portion 512, and one end of the spring 53 is in contact with the step portion.

  As shown in FIG. 2, a clip 105 is fixed to the portion forming the opening at the tip of the valve body 10. A washer 106 is provided in contact with the clip 105 and a disc spring 107 is provided in contact with the washer 106 in order from the clip 105 toward the base end side (right side in FIG. 1) of the electromagnetic valve 1. Further, the other end of the spring 53 is in contact with the washer 106, and the spring 53 functions as a compression spring. Accordingly, the distal end support body 51 is always biased toward the proximal end side of the electromagnetic valve 1 by the spring 53, and the head portion 511 of the distal end section support body 51 is in contact with the valve body 31.

Next, the operation of the directional control valve having the above configuration will be described. 2 and 3, for convenience of explanation, the electromagnetic valve 1 is illustrated as being vertically inverted with respect to the electromagnetic valve 1 in FIG. 1.
As shown in FIG. 2, when the solenoid valve 1 is in an OFF state, that is, when electricity is not supplied to the coil 62 of the solenoid unit 60 (see FIG. 1), the magnetic force of the coil 62 does not act on the plunger 63. . For this reason, since the valve bodies 31 and 32 and the intermediate body 41 are not urged toward the distal end side, the distal end support body 51 is moved toward the proximal end side by the urging force of the spring 53. Accordingly, the valve body 31, the intermediate body 41, the valve body 32, and the plunger 63 are moved to the proximal end side by the head portion 511 of the distal end support body 51.

  Then, the valve body 31 is separated from the valve seat 521 to open the fluid flow path in this portion, and contacts the valve seat 1113 to close the fluid flow path in this portion. At the same time, the valve body 32 is separated from the valve seat 1111 to open the fluid passage in this portion, and contacts the valve seat 611 to close the fluid passage in this portion.

  Thereby, as shown by an arrow A1 in FIG. 2, the fluid that flows into the guide hole 100 (see FIG. 1) from the port I1 flows through the flow path 1023, flows into the large diameter portion 1002, and is discharged from the port O1. The In addition, as shown by an arrow A2 in FIG. 2, the fluid that has flowed into the guide hole 100 (see FIG. 1) from the port O2 flows into the large diameter portion 1004, circulates through the flow path 1024, and reaches the tip of the valve body 10. It is discharged from the opening D1.

  Accordingly, the closing of the fluid flow path due to the valve body 31 abutting against the valve seat 1113 is sealed by the biasing force of the spring 53, but the fluid flow path due to the valve body 32 abutting against the valve seat 611. Is closed by the sum of the biasing force of the spring 53 and the original pressure of the fluid flowing into the guide hole 100 from the port I1.

  As shown in FIG. 3, when the electromagnetic valve 1 is in an ON state, that is, when electricity is supplied to the coil 62 of the solenoid unit 60 (see FIG. 1), the magnetic force of the coil 62 acts on the plunger 63. . For this reason, the plunger 63 is moved to the distal end side and pushes the valve body 32 toward the distal end side. Thereby, the valve body 32, the intermediate body 41, the valve body 31, and the front-end | tip part support body 51 are moved to the front end side against the urging | biasing force of the spring 53. FIG.

  Then, the valve body 31 is separated from the valve seat 1113 to open the fluid flow path in this portion, and contacts the valve seat 521 to close the fluid flow path in this portion. At the same time, the valve body 32 is separated from the valve seat 611 to open the fluid passage in this portion, and contacts the valve seat 1111 to close the fluid passage in this portion.

  Thereby, as shown by an arrow B1 in FIG. 3, the fluid flowing into the guide hole 100 (see FIG. 1) from the port I1 flows through the flow path 1023, flows into the large diameter portion 1004, and is discharged from the port O2. The Further, as shown by an arrow B2 in FIG. 3, the fluid that has flowed into the guide hole 100 from the port O1 flows into the large diameter portion 1002, flows through the flow path 1022, and is discharged from the port D2.

  Therefore, the closing of the fluid flow path due to the valve body 32 coming into contact with the valve seat 1111 is sealed by the pressing force of the plunger 63, but the fluid flow path due to the valve body 31 coming into contact with the valve seat 521. Is closed by the sum of the pressing force by the plunger 63 and the original pressure of the fluid flowing into the guide hole 100 from the port I1.

According to this embodiment, the following effects are produced.
In this embodiment, the flow paths that are arranged in the large-diameter portions 1002 and 1004 and are spaced apart from the seal surfaces 612, 1112, 1114, and 522 and open and communicate with the seal surfaces 612, 1112, 1114, and 522 are released. Or spherical valve bodies 31, 32 that contact the sealing surfaces 612, 1112, 1114, 522 and close the flow paths that open and communicate with the sealing surfaces 612, 1112, 1114, 522; An intermediate body 41 that is disposed so as to be movable in the portion 1003, forms a flow path 1023 in the central small diameter portion 1003, and can come into contact with the valve bodies 31 and 32, and a solenoid unit 60 that drives the valve body 32. One port I1 is formed in the central small diameter portion 1003, and one port O1 and O2 is formed in each of the large diameter portions 1002 and 1004. The proximal end side small diameter portion 1001 and the distal end side small diameter portion 1005 are formed. With respect to the large-diameter portions 1002 and 1004, ports D1 and D2 are formed one by one in the portion of the valve body 10 opposite to the large-diameter portions 1002 and 1004.

Thereby, since the spherical valve bodies 31 and 32 are used, it becomes a structure which does not use a spool valve. For this reason, the pressure loss by the leakage which generate | occur | produced when using a spool valve is suppressed. In addition, since the two valve bodies 31 and 32 and the intermediate body 41 disposed between the two valve bodies 31 and 32 are disposed in the guide hole 100 of the valve body 10, The configuration can be simplified, and it is easy to reduce the size. Further, since the valve body 10 is formed as an integral structure, that is, a single component, it can be incorporated into the hydraulic control body as a multi-way valve.
Further, the force acting on the valve body 31 and the force acting on the valve body 32 can be made different in strength, so that a very high accuracy is not required for processing of each member, and the manufacture of the direction control valve is facilitated. Can be done.

In addition, a distal end support body 51 that is movably disposed at the distal end side small diameter portion 1005, forms a flow path 1024 in the distal end side small diameter portion 1005, and can contact the valve body 31 is provided. In addition, a plunger 63 is provided which is movably disposed in the proximal end side small diameter portion 1001, forms a flow path 1022 in the proximal end side small diameter portion 1001, and can come into contact with the valve body 32.
For this reason, with respect to the proximal end side small diameter portion 1001 and the distal end side small diameter portion 1005, a flow path communicating with the ports D1 and D2 formed one by one in the portion of the valve body 10 opposite to the large diameter portions 1002 and 1004. Is secured. For this reason, it becomes possible to distribute | circulate a fluid to these ports D1 and D2, and it becomes possible to implement | achieve a 5-way valve with a simple structure.

Further, the distal end side small diameter portion 1005 is formed by a distal end cylindrical portion 52 as a small diameter portion forming member which is configured by a member different from the valve main body 10 and fixed to the valve main body 10.
For this reason, the processing of the sealing surface 522 of the valve seat 521 can be performed in advance on the distal end tubular portion 52, and then the distal end tubular portion 52 can be fixed to the valve body 10. For this reason, it becomes possible to process the sealing surface 522 of the valve seat 521 accurately and easily.

In addition, a drive unit that drives the valve body 32 by the solenoid unit 60 is configured.
For this reason, by supplying electricity to the coil 62, it is possible to easily move the valve body 32 and switch between opening / closing the flow path in the guide hole 100. For this reason, it becomes possible to simplify the structure of the whole solenoid valve 1 which has a direction control valve.

[Second Embodiment]
Compared to the direction control valve according to the first embodiment, the direction control valve according to the second embodiment of the present invention does not have the solenoid unit 60 unlike the electromagnetic valve 1, and the signal oil LO is used as the drive unit. A device for driving the valve body 32 is provided. That is, the directional control valve according to the second embodiment is different in that it constitutes a multi-way valve 1A that is operated by a signal oil LO (see FIG. 5) based on hydraulic pressure. FIG. 4 is a cross-sectional view showing a state where the multi-way valve 1A configured by the directional control valve according to the second embodiment is OFF. FIG. 5 is a cross-sectional view showing a state in which the multi-way valve 1A configured by the directional control valve is ON.
In the following description, the distal end side (the left side in FIGS. 4 to 5) of the multi-way valve 1A is defined as the “front end side”, and the proximal end side (the right side in FIGS. 4 to 5) of the multi-way valve 1A is defined as the “proximal end”. It is defined as “side”.

  Specifically, the base end portion of the valve main body 10A is fixed to the cap 60A. A flow path 6001 for signal oil LO is formed in the cap 60A. The flow path 6001 is connected to a device (not shown) that performs switching between supply / stop of the signal oil LO.

  Further, the inner diameter of the base end portion of the valve main body 10A corresponding to the end portion on the base end side is a portion closer to the distal end side of the valve main body 10A than that portion, and the large diameter portion 1002 of the guide hole 100 (see FIG. 1). The diameter is larger than the portion to be formed, and constitutes the base end portion large diameter portion 1008A. A cylindrical base end cylindrical portion 65A is fitted to the step portion whose inner diameter is increased by one step. The inner diameter of the end portion of the proximal end cylindrical portion 65A (the left end portion of the proximal end tubular portion 65A in FIG. 4) is smaller than the inner diameter of the large diameter portion 1002, and this portion includes a proximal end cylinder. The proximal end side small diameter portion 1011 which is the internal space of the shape portion 65A is opened, and the proximal end side small diameter portion 1011 and the large diameter portion 1002 constitute a flow path communicating with the opening.

  The periphery of the opening constitutes a valve seat 6501 having an annular seal surface 6502 and can contact the valve body 32. In the internal space of the base end cylindrical portion 65A, a base side piston 66A is disposed so as to be movable in the axial direction (left and right direction in FIG. 4) of the valve body 10A with respect to the base end cylindrical portion 65A.

  The base side piston 66A has a head portion 661A having a small outer diameter and an inner diameter, and a leg portion 662A integrally formed with the head portion 661A. The outer diameter of the leg portion 662A is larger than the outer diameter of the head portion 661A. An O-ring 6621A is provided on the outer peripheral surface of the leg portion 662A, and the outer peripheral surface of the leg portion 662A is sealed with the inner peripheral surface of the base end cylindrical portion 65A in a proximal cylindrical shape. It is configured to slide with respect to the inner peripheral surface of the portion 65A.

  The head portion 661A of the base side piston 66A is inserted through the base end side small diameter portion 1011 and can protrude from the opening of the base end cylindrical portion 65A toward the front end side. A fluid flow path 6631A is provided between the head portion 661A of the base side piston 66A in the base end side small diameter portion 1011 and the portion of the base end cylindrical portion 65A forming the base end side small diameter portion 1011. It is formed, and fluid can flow through this channel 6631A. A space surrounded by the cap 60A, the base end cylindrical portion 65A, and the leg portion 662A of the base side piston 66A constitutes an oil storage chamber 1009A in which the flow path of the signal oil LO is temporarily stored.

Next, the operation of the multi-way valve 1A having the above configuration will be described.
As shown in FIG. 4, when the working oil pressure by the signal oil LO is not acting on the base side piston 66A, the base side piston 66A is not biased toward the tip side. For this reason, since the valve bodies 31 and 32 and the intermediate body 41 are not biased toward the distal end side (the left side in FIG. 4) of the multi-way valve 1 </ b> A, the distal end support body 51 is moved to the proximal end side by the biasing force of the spring 53. Moved to. Accordingly, the valve body 31, the intermediate body 41, the valve body 32, and the base side piston 66 </ b> A are moved to the base end side by the head portion 511 of the distal end support body 51.

  Then, the valve body 31 is separated from the valve seat 521 to open the fluid flow path in this portion, and contacts the valve seat 1113 to close the fluid flow path in this portion. At the same time, the valve body 32 is separated from the valve seat 1111 to open the fluid passage in this portion, and contacts the valve seat 6501 to close the fluid passage in this portion.

  As a result, as shown by an arrow A11 in FIG. 4, the fluid that flows into the guide hole 100 (see FIG. 1) from the port I1 flows through the flow path 1023, flows into the large diameter portion 1002, and is discharged from the port O1. The In addition, as shown by an arrow A12 in FIG. 4, the fluid that has flowed into the guide hole 100 (see FIG. 1) from the port O2 flows into the large diameter portion 1004, flows through the flow path 1024, and reaches the tip of the valve body 10A. It is discharged from the opening D1.

  As shown in FIG. 5, when the working oil pressure by the signal oil LO is acting on the base side piston 66A, the base side piston 66A is attached to the tip side by the working oil pressure of the signal oil LO flowing into the oil storage chamber 1009A. The valve body 32 is pushed toward the distal end side. Thereby, the base side piston 66 </ b> A moves the valve body 32, the intermediate body 41, the valve body 31, and the distal end support body 51 toward the distal end side against the urging force of the spring 53.

  Then, the valve body 32 is separated from the valve seat 6501 to open the fluid flow path in this portion, and contacts the valve seat 1111 to close the fluid flow path in this portion. At the same time, the valve body 31 is separated from the valve seat 1113 to open the fluid passage in this portion, and contacts the valve seat 521 to close the fluid passage in this portion.

  Accordingly, as shown by an arrow B11 in FIG. 5, the fluid that has flowed into the guide hole 100 (see FIG. 1) from the port I1 flows through the flow path 1023, flows into the large diameter portion 1004, and is discharged from the port O2. The Further, as shown by an arrow B12 in FIG. 5, the fluid that has flowed into the guide hole 100 from the port O1 flows into the large diameter portion 1002, flows through the flow path 6631A, and is discharged from the port D2.

  According to the present embodiment, the drive unit is configured by a device that drives the valve body 32 with the signal oil LO. For this reason, the valve body 32 can be easily moved by the hydraulic pressure of the signal oil LO, and the opening / closing of the flow path in the guide hole 100 can be switched.

It should be noted that the present invention is not limited to the above-described embodiment, and modifications, improvements, etc. within a scope that can achieve the object of the present invention are included in the present invention.
For example, the configuration of each part of the directional control valve is not limited to the configuration of each part of the directional control valve in the present embodiment. For example, although the valve body 32 has been moved by the plunger 63 and the signal oil LO, the configuration for moving the valve body 32 is not limited thereto. In the present embodiment, when the valve body 32 is not moved by the plunger 63, the valve body 31, the intermediate body 41, and the valve body 32 are biased by the biasing force of the spring 53. Is not limited to being used.

DESCRIPTION OF SYMBOLS 1 ... Solenoid valve 1A ... Multi-way valve 10 ... Valve body 31 ... Valve body 32 ... Valve body 40 ... Intermediate body 51 ... Tip part support body (2nd edge part side contact member)
52 ... tip cylindrical portion (small diameter portion forming member)
60 ... Solenoid part (drive part)
63. Plunger (first end side contact member)
65A ... Base end cylindrical part (small diameter part forming member)
66A: Base side piston (valve body pressing member)
100 ... Guide hole 521 ... Valve seat (end side valve seat)
522 ... Sealing surface 611 ... Valve seat (end side valve seat)
612 ... Sealing surface 1001 ... Base end side small diameter part (end part side small diameter part)
1002 ... Large diameter part 1003 ... Central small diameter part 1004 ... Large diameter part 1005 ... Tip end side small diameter part (end part side small diameter part)
1023 ... Flow path 1111 ... Valve seat (central valve seat)
1112 ... Sealing surface 1113 ... Valve seat (central valve seat)
1114: Seal surface 6631A ... Flow path D1 ... Port D2 ... Port I1 ... Port O1 ... Port O2 ... Port LO ... Signal oil

Claims (5)

A guide hole is formed in the inside, and the guide hole communicates with the central small diameter portion, the large diameter portion communicating with the central small diameter portion at one end and the other end of the central small diameter portion, and the large diameter portion, respectively. A valve main body having a plurality of ports communicating with the guide hole,
A central valve seat having annular sealing surfaces located at both ends of the central small diameter portion;
An end-side valve seat having an annular sealing surface located at an end of the end-side small-diameter portion communicating with the large-diameter portion;
Disposed at each of the large-diameter portions and spaced apart from the seal surface to open a flow path that opens and communicates with the seal surface, or contacts the seal surface and opens at the seal surface. A spherical valve body that closes the communicating channel;
An intermediate body that is movably disposed in the central small diameter portion, forms a flow path in the central small diameter portion, and can contact the valve body;
A first end side abutting member that is movably disposed at the one end side small diameter portion and is capable of abutting on the valve body;
A second end side abutting member that is movably disposed at the other end side small diameter portion and is capable of abutting on the valve body;
A drive unit that drives the valve body via the first end side contact member,
One port is formed in the central small diameter portion,
The large diameter portion is formed with one port each,
A directional control valve in which the port is formed one by one in a portion of the valve body opposite to the large diameter portion with respect to the end side small diameter portion.   The first end-side contact member is a valve body pressing member that is movably disposed at the end-side small diameter portion, and forms a flow path at the end-side small diameter portion and contacts the valve body. The direction control valve according to claim 1, wherein the direction control valve is configured by a contactable valve body pressing member.   The direction control valve according to claim 1 or 2, wherein the end-side small-diameter portion is formed by a small-diameter portion forming member that is formed of a member different from the valve main body and is fixed to the valve main body.   The direction control valve according to any one of claims 1 to 3, wherein the driving unit is configured by a solenoid.   The directional control valve according to any one of claims 1 to 3, wherein the driving unit is configured by a device that drives the valve body with signal oil.

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