JP6010192B1 - Pressure fluid control device - Google Patents

Abstract

The present invention provides a pressure fluid control device that makes the entire device thin and is easy to design and process. A storage hole is formed in a valve body, and a spool valve and an electromagnetic valve are stored in the storage hole. At this time, the spool valve 14 is disposed on the central axis A <b> 3 of the electromagnetic valve 16. In a state where the electromagnetic valve 16 is stored in the storage hole 18, the pressure fluid from the electromagnetic valve 16 to the pilot chamber 32 is formed by the outer peripheral surface of the electromagnetic valve 16 (the flat portion 54 a of the cylindrical portion 54) and the inner peripheral surface of the storage hole 18. A second pilot pressure supply flow path 64 is formed. [Selection] Figure 1

Description

  The present invention relates to a pressure fluid control device including a spool valve and a solenoid valve in a valve body.

  A pressure fluid control device in which a spool valve that switches the output direction of pressure fluid in response to the supply and shutoff of pilot pressure and an electromagnetic valve that switches the supply and shutoff of pilot pressure to the spool valve are attached to the valve body is, for example, a patent It is disclosed in Document 1. In this pressure fluid control apparatus, the input port of the spool valve selectively communicates with either the first output port or the second output port. Specifically, when the input port and the first output port are in a communication state, the input port and the second output port are in a communication cut-off state. Further, when the input port and the second output port are in communication with each other, the input port and the first output port are in communication disconnection.

  The pressure fluid control device shown in Patent Document 1 includes a spool valve and an electromagnetic valve arranged in parallel. On the other hand, a pressure fluid control device including a spool valve and an electromagnetic valve arranged in series is disclosed in Patent Document 2, for example.

Japanese Patent Laying-Open No. 2015-55353 Japanese Utility Model Publication No. 52-35532

  In the pressure fluid control device disclosed in Patent Document 1, a spool valve and an electromagnetic valve are arranged in parallel. In such an arrangement, the thickness of the pressure fluid control device includes the thickness of the spool valve, the thickness of the solenoid valve, and the length of the fluid path formed between the spool valve and the solenoid valve (of the pressure fluid control device). It becomes more than the total value of the length in the width direction.

  In the pressure fluid control device shown in Patent Document 2, a spool valve and a solenoid valve are arranged in series. In this arrangement, the thickness of the pressure fluid control device is equal to the thickness of the spool valve or the thickness of the solenoid valve. For this reason, there exists an advantage that the whole apparatus is thin compared with the pressure fluid control apparatus shown by patent document 1. FIG. On the other hand, the pressure fluid control device shown in Patent Document 2 is provided with a concentrated flow path of pressure fluid at the end of the electromagnetic valve. Specifically, a flow path for supplying the pressure fluid for pilot pressure from the spool valve to the valve chamber of the electromagnetic valve and a flow path for supplying the pressure fluid from the valve chamber of the electromagnetic valve to the pilot chamber of the spool valve are concentrated. For this reason, the design and processing of the flow path are complicated.

  The present invention has been made in consideration of such problems, and an object of the present invention is to provide a pressure fluid control device that can be designed and processed easily while making the entire device thin.

  The present invention provides a solenoid valve that switches between a communication state and a communication cut-off state between an input port and a pilot chamber, and switches the position of the spool in response to switching between the communication state and the communication cut-off state between the input port and the pilot chamber. In a pressure fluid control device comprising a spool valve for switching an output direction, and a valve main body provided with the spool valve and the electromagnetic valve, the valve main body is formed with a storage hole for storing the electromagnetic valve and the spool, The spool valve is disposed on the central axis of the solenoid valve, and a pilot pressure supply passage for supplying pressure fluid from the solenoid valve to the pilot chamber is formed by the outer peripheral surface of the solenoid valve and the inner peripheral surface of the storage hole. It is characterized by being.

  In the present invention, the spool valve is disposed on the central axis of the electromagnetic valve. That is, the spool valve and the electromagnetic valve are not arranged in parallel but are arranged in series. With such a configuration, the valve body can be thinned, and the pressure fluid control device itself can be thinned.

  In the present invention, the pilot pressure supply flow path is formed by the outer peripheral surface of the electromagnetic valve and the inner peripheral surface of the storage hole for storing the electromagnetic valve. That is, it is not necessary to form a pilot pressure supply channel in the valve body for supplying the pressure fluid output from the electromagnetic valve to the pilot chamber. With such a configuration, the valve body can be thinned, and the pressure fluid control device itself can be thinned.

  In the present invention, the pilot pressure supply passage is not formed inside the electromagnetic valve, but a bypass communicating with the pilot chamber is formed outside the electromagnetic valve. Such a configuration facilitates the design and processing of the pilot pressure supply channel.

  In this invention, the said solenoid valve and the said spool valve may be arrange | positioned so that the center axis line of the said solenoid valve and the center axis line of the said spool valve may be located on the same straight line. With such a configuration, the pressure fluid control device can be further thinned.

  In the present invention, the outer peripheral surface of the solenoid valve that forms the pilot pressure supply flow path may have a flattened planar shape. By using the flattening which is easy to process, the design and processing of the pilot pressure supply flow path are facilitated.

  In the present invention, the pilot chamber may be defined by the end face of the electromagnetic valve, the inner peripheral face of the storage hole, and the end face of the spool. Such a configuration facilitates processing of the valve body. In addition, since the solenoid valve and the spool valve are connected without any member, the pressure fluid control device can be shortened.

  According to the present invention, the pressure fluid control device is thinned. In addition, according to the present invention, the design and processing of the pilot pressure supply channel can be facilitated.

FIG. 1 is a longitudinal sectional view of a pressure fluid control device in which a coil is not energized. FIG. 2 is a longitudinal sectional view of the configuration of the valve portion and its periphery. FIG. 3 is a longitudinal sectional view of the pressure fluid control device in which the coil is energized.

  A preferred embodiment of a pressure fluid control apparatus according to the present invention will be described in detail below with reference to the accompanying drawings. Note that “upper” used in the following description means the upper direction in each drawing and one direction in the longitudinal direction of the pressure fluid control device. Further, “down” means the downward direction in each figure and the other direction in the longitudinal direction of the pressure fluid control device. However, the installation posture of the pressure fluid control apparatus according to the present invention is not specified.

[Configuration of Pressure Fluid Control Device 10]
<Overall configuration>
The pressure fluid control apparatus 10 according to the present embodiment will be described with reference to the drawings. The pressure fluid control device 10 is used, for example, as a control valve that controls the output of pressure fluid in order to change the operation characteristics of a valve operating device of an engine mounted on a vehicle. In this case, the pressure fluid control device 10 is attached to an engine body (not shown).

  As shown in FIGS. 1 and 3, the pressure fluid control device 10 includes a valve body 12, a spool valve 14 attached to the lower part of the valve body 12, and an electromagnetic valve 16 attached to the upper part of the valve body 12. Is done. The valve body 12 is formed with a storage hole 18 extending in the vertical direction, that is, in the longitudinal direction. An opening 18a is formed at the upper end of the storage hole 18, and a bottom surface 18b is formed at the bottom. Further, a recess 18c is formed in the center of the bottom surface 18b. The spool 20 of the spool valve 14 is accommodated in the lower part of the accommodation hole 18, and the cylindrical member 52 of the electromagnetic valve 16 is accommodated in the upper part. The spool valve 14 and the electromagnetic valve 16 are arranged in series and connected. The center axis of the spool valve 14 (center axis of the spool 20) A2 and the center axis of the solenoid valve 16 (center axes of the cylindrical member 52, the valve rod 80, the movable core 108, and the fixed core 110) A3 are the center axis of the storage hole 18. Located on A1.

  The valve body 12 is formed with an input port 24, a first output port 26, a second output port 28, and a release port 30 that communicate the inside (housing hole 18) and the outside of the valve body 12. A filter 34 is attached to the input port 24. Further, the valve body 12 is formed with a first pilot pressure supply channel 136 that supplies a pressure fluid used as a pilot pressure from the spool valve 14 to the electromagnetic valve 16. Further, the valve body 12 is formed with a pilot pressure release port 138 for discharging a pressure fluid used as a pilot pressure from a pilot chamber 32 described later.

<Configuration of spool valve 14>
The spool valve 14 includes a spool 20 that is housed inside the housing hole 18 so as to be slidable in the vertical direction, and a spring 22 that is interposed between the bottom surface 18 b of the housing hole 18 and the spool 20. Further, the spool valve 14 includes an input port 24, a first output port 26, a second output port 28 and a release port 30 formed in the valve body 12, and a pilot chamber 32 defined above the spool 20. Have.

  A convex portion 38 is formed at the center of the spool upper end portion 36 of the spool 20. A first annular recess 40 is formed in the upper part of the outer peripheral surface of the spool 20, and a second annular recess 42 is formed in the outer peripheral surface below the first annular recess 40. A pressure fluid release passage 44 extending in the vertical direction is formed inside the spool 20. A stepped portion 44 a that faces the bottom surface 18 b of the storage hole 18 is formed in the lower portion of the pressure fluid release channel 44. The upper pressure fluid release flow path 44 has a small diameter and the lower pressure fluid release flow path 44 has a large diameter with the stepped portion 44a as a boundary. A plurality of first holes 46 are formed at the position of the first annular recess 40 to communicate the inside of the spool 20 (pressure fluid release flow path 44) with the outside. A plurality of second holes 48 are formed below the spool 20 and below the stepped portion 44a so as to communicate the inside (pressure fluid release flow path 44) of the spool 20 with the outside.

  The upper end of the spring 22 abuts on the stepped portion 44 a of the spool 20, and the lower end of the spring 22 abuts on the recess 18 c of the storage hole 18. The spool 20 receives an upward biasing force due to the elastic force of the spring 22.

  Further, the pilot chamber 32 is formed by the surface of the spool upper end portion 36 (including the convex portion 38) of the spool 20, the inner peripheral surface of the storage hole 18, and the lower end surface 60 of the cylindrical member 52 of the electromagnetic valve 16 described later. Defined. When pressure fluid (for example, pressure oil) is supplied to the pilot chamber 32, a downward pressing force by the pressure fluid acts on the spool 20.

  As shown in FIG. 1, when the input port 24 and the pilot chamber 32 are in a communication cut-off state, the spool valve 14 causes the input port 24 and the first output port 26 to communicate with each other by the spool 20. 2 Set the output port 28 to the communication cut-off state. As shown in FIG. 3, when the input port 24 and the pilot chamber 32 are in communication with each other, the spool valve 14 causes the input port 24 and the second output port 28 to communicate with each other by the spool 20. The output port 26 is set in the communication cut-off state.

<Configuration of solenoid valve 16>
The electromagnetic valve 16 includes a valve unit 50 attached to the valve main body 12 and a solenoid unit 100 attached above the valve unit 50. The electromagnetic valve 16 used in this embodiment is a three-way valve.

<< Configuration of Valve Unit 50 >>
The valve part 50 is demonstrated referring FIG. 2 other than FIG. 1, FIG. The valve unit 50 includes a cylindrical member 52 that is formed of a magnetic material and functions as a yoke of the solenoid unit 100. The tubular member 52 includes a bottomed tubular tubular portion 54 and a flange portion 56 that expands in the radial direction from the outer peripheral upper portion of the tubular portion 54. The cylindrical portion 54 is inserted into the storage hole 18 in a loose state, and the lower end surface of the flange portion 56 abuts on the upper end surface of the valve body 12. An annular first seal member 58 is provided between the flange portion 56 and the valve body 12. The storage hole 18 is sealed by the first seal member 58.

  A chamfered portion 54 a is formed at the lower outer periphery of the cylindrical portion 54. The flattening portion 54 a has a planar shape that is flattened so as to be parallel to the central axis A <b> 3 of the solenoid valve 16 and to be connected to the lower end surface 60 of the cylindrical member 52. A pilot pressure output port 62 communicating with the valve housing hole 66 inside the cylinder portion 54 is formed in the flattening portion 54a. The outer peripheral surface of the cylindrical portion 54 excluding the flattening portion 54a is a curved surface along the inner peripheral surface of the storage hole 18, whereas the surface of the flattening portion 54a is a flat surface. For this reason, the surface of the flat portion 54 a and the inner peripheral surface of the storage hole 18 do not come into contact with the cylindrical portion 54 inserted into the storage hole 18. That is, a gap is formed between the two. This gap is used as the second pilot pressure supply channel 64. The pilot pressure output port 62 formed on the surface of the flat portion 54 a and the pilot chamber 32 defined between the cylindrical portion 54 and the spool 20 communicate with each other through the second pilot pressure supply flow path 64. Thus, a bypass formed by the outer peripheral surface of the cylindrical member 52 (cylinder part 54) and the inner peripheral surface of the storage hole 18 is provided outside the electromagnetic valve 16.

  A valve storage hole 66 extending in the vertical direction is formed in the cylindrical portion 54. A third pilot pressure supply flow path 68 communicating with the valve storage hole 66 is formed below the valve storage hole 66. In addition to the flattening portion 54a, a pilot pressure input port 70 that communicates the inside (third pilot pressure supply flow path 68) and the outside of the tube portion 54 is formed in the lower portion of the outer periphery of the tube portion 54. Further, a pilot pressure release port 72 is formed above the third pilot pressure supply flow path 68 to communicate the inside (valve housing hole 66) of the cylindrical portion 54 with the outside.

  A first valve seat member 74, a second valve seat member 76, a valve body 78, a valve rod 80, and a bearing 82 are stored in the valve storage hole 66.

  The first valve seat member 74 is fitted into a small diameter portion 66 a formed in the lower portion of the valve housing hole 66. The lower end surface of the first valve seat member 74 contacts the bottom surface of the valve storage hole 66. The first valve seat member 74 is formed with a first valve hole 84 penetrating in the vertical direction. The first valve hole 84 is formed with a first valve seat 86 having an inner peripheral surface whose diameter increases upward and faces the second valve seat member 76. A notch 88 is partially formed in the upper opening 84 a of the first valve hole 84. The first valve hole 84 and the pilot pressure output port 62 formed in the tubular member 52 communicate with each other through the notch 88.

  The second valve seat member 76 is press-fitted into the small diameter portion 66 a of the valve storage hole 66. The lower end surface of the second valve seat member 76 contacts the upper end surface of the first valve seat member 74. A second valve hole 90 penetrating in the vertical direction is formed in the second valve seat member 76. A second valve seat 92 is formed in the lower portion of the second valve hole 90 so as to expand downward and face the first valve seat member 74.

  A valve chamber 94 is defined by the first valve seat member 74 and the second valve seat member 76. A ball-shaped valve body 78 is accommodated in the valve chamber 94. The valve body 78 is movable between the first valve seat 86 and the second valve seat 92. When the valve body 78 is seated on the first valve seat 86, the pilot pressure input port 70 and the pilot pressure output port 62 are in a communication cut-off state. When the valve body 78 is seated on the second valve seat 92, the pilot pressure input port 70 and the pilot pressure output port 62 are in communication.

  A bearing 82 for supporting the valve rod 80 slidably in the vertical direction along the central axis A3 is press-fitted into the valve housing hole 66 above the second valve seat member 76. The lower end side of the valve stem 80 is inserted into the second valve hole 90. The lower end 96 of the small diameter of the valve stem 80 protrudes downward from the center of the second valve seat 92 and pushes down the valve body 78 as the valve stem 80 moves downward. A gap is formed between the outer peripheral surface of the valve stem 80 and the inner peripheral surface of the second valve hole 90. Therefore, with the valve body 78 seated on the first valve seat 86, the pilot pressure output port 62 and the pilot pressure release port 72 are connected via the first valve hole 84, the second valve hole 90, and the valve storage hole 66. Communicate.

<< Configuration of Solenoid Unit 100 >>
The solenoid unit 100 includes a hollow bobbin 102, a coil 104 wound around the bobbin 102, and a magnetic movable core 108 and a fixed core 110 housed in the hollow portion 106 of the bobbin 102.

  A first flange portion 112 is formed at the lower end of the bobbin 102, and a second flange portion 114 is formed at the upper end. The lower end surface of the first flange portion 112 and the upper end surface of the flange portion 56 of the tubular member 52 are in contact with each other, and an annular second seal member 116 is provided therebetween. The valve housing hole 66 is sealed by the second seal member 116.

  The bobbin 102 and the coil 104 are covered with a resin 118 on the outer peripheral surface, and further covered with the housing 120 together with the flange portion 56 and the upper end portion of the valve body 12. By caulking the lower end of the housing 120 to the upper end portion of the valve body 12, the electromagnetic valve 16 and the valve body 12 are brought into close contact with each other. The upper end surface of the second flange portion 114 and the upper inner wall surface of the housing 120 are in contact with each other, and an annular third seal member 122 is provided therebetween. The hollow portion 106 of the bobbin 102 is sealed by the third seal member 122. A notch 124 is formed in a part of the side surface of the housing 120. A coupler 126 integrated with the resin 118 protrudes from the notch 124 to the outside of the housing 120. The coupler 126 holds a power supply terminal 128 that is electrically connected to the coil 104.

  The fixed core 110 is formed with a bottomed spring holding hole 130 that opens downward. A spring 132 is accommodated in the spring holding hole 130. The upper end of the spring 132 is in contact with the bottom surface of the spring holding hole 130, and the lower end of the spring 132 is in contact with the upper end surface of the movable core 108. The spring 132 applies a downward biasing force to the movable core 108.

  The upper part of the movable core 108 is housed in the hollow part 106 of the bobbin 102, and the lower part is housed in the valve housing hole 66 via a nonmagnetic collar member 134. The lower end surface of the movable core 108 contacts the upper end surface of the valve stem 80. With the coil 104 not energized, the movable core 108 receives the biasing force of the spring 132 and is positioned below. While the coil 104 is energized, the movable core 108 generates a suction force toward the fixed core 110. This suction force is larger than the biasing force of the spring 132, and the movable core 108 is displaced upward.

[Operation of Pressure Fluid Control Device 10]
<When the coil 104 is not energized>
1 and 2 show the pressure fluid control device 10 when the coil 104 is not energized. When the coil 104 is not energized, a downward urging force by the spring 132 acts on the movable core 108, while an attractive force toward the fixed core 110 does not act. In this state, the movable core 108 pushes the valve stem 80 downward, and the valve stem 80 pushes the valve element 78 downward. Then, the valve body 78 is seated on the first valve seat 86. That is, the electromagnetic valve 16 is closed.

  When the solenoid valve 16 is in the closed state, a flow path communicating with the input port 24, that is, a flow path constituted by the first pilot pressure supply flow path 136, the pilot pressure input port 70, and the third pilot pressure supply flow path 68 The flow path communicating with the pilot chamber 32, that is, the flow path constituted by the pilot pressure output port 62 and the second pilot pressure supply flow path 64 is in a communication cut-off state. As a result, the communication between the input port 24 and the pilot chamber 32 is cut off.

  Further, when the electromagnetic valve 16 is in the closed state, the flow path communicating with the release port 30, that is, the pilot pressure release port 138, the pilot pressure release port 72, the valve storage hole 66, the second valve hole 90, and the first valve hole 84. And the flow path communicating with the pilot chamber 32, that is, the flow path configured by the pilot pressure output port 62 and the second pilot pressure supply flow path 64 are in communication with each other. For this reason, the pilot chamber 32 has the same pressure as the release port 30.

  When the pilot chamber 32 has the same pressure as the release port 30, the upward biasing force acting on the spool 20 by the spring 22 exceeds the downward pressing force acting on the spool 20 by the pressure fluid. In this state, the spool 20 is displaced to a position where the upper end surface of the convex portion 38 contacts the lower end surface 60 of the tubular member 52. Then, the input port 24 and the first output port 26 are in communication with each other through the flow path constituted by the second annular recess 42 and the storage hole 18. On the other hand, the spool 20 brings the input port 24 and the second output port 28 into a communication cut-off state. Further, the second output port 28 and the release port 30 are in communication with each other through a flow path constituted by the second hole 48, the pressure fluid release flow path 44, the first hole 46, and the first annular recess 40.

  As described above, according to the pressure fluid control device 10, the pressure fluid supplied from the pressure fluid supply source (not shown) can be output from the first output port 26 by not energizing the coil 104.

<When the coil 104 is energized>
FIG. 3 shows the pressure fluid control device 10 in which the coil 104 is energized. When the coil 104 is energized through the power supply terminal 128, a downward biasing force by the spring 132 acts on the movable core 108, while a suction force toward the fixed core 110 acts. When the suction force becomes larger than the biasing force, the movable core 108 is displaced toward the fixed core 110 side. In this state, the valve body 78 receives the fluid pressure of the pressure fluid supplied to the third pilot pressure supply flow path 68 and is displaced upward while pushing up the valve rod 80 upward. The valve body 78 is seated on the second valve seat 92. That is, the electromagnetic valve 16 is in an open state.

  When the solenoid valve 16 is in the open state, a flow path communicating with the input port 24, that is, a flow path constituted by the first pilot pressure supply flow path 136, the pilot pressure input port 70, and the third pilot pressure supply flow path 68 The flow path communicating with the pilot chamber 32, that is, the flow path constituted by the pilot pressure output port 62 and the second pilot pressure supply flow path 64 is in communication. As a result, the input port 24 and the pilot chamber 32 communicate with each other, and pressure fluid is supplied from the input port 24 to the pilot chamber 32.

  When the pressure fluid is supplied to the pilot chamber 32, the downward pressing force acting on the spool 20 by the pressure fluid exceeds the upward biasing force acting on the spool 20 by the spring 22. In this state, the spool 20 is displaced to a position where the lower end surface comes into contact with the bottom surface 18 b of the storage hole 18. Then, the input port 24 and the second output port 28 are in communication with each other through the flow path constituted by the second annular recess 42 and the storage hole 18. On the other hand, the spool 20 brings the input port 24 and the first output port 26 into a communication cut-off state. Further, the first output port 26 and the release port 30 are in communication with each other through a flow path constituted by the first annular recess 40 and the storage hole 18.

  As described above, according to the pressure fluid control device 10, by supplying current to the coil 104, the pressure fluid supplied from a pressure fluid supply source (not shown) can be output from the second output port 28.

[Summary of this embodiment]
In the pressure fluid control device 10 according to the present embodiment, a valve body 12 is provided with a spool valve 14 and an electromagnetic valve 16. The solenoid valve 16 switches the communication state between the input port 24 and the pilot chamber 32 and the communication cut-off state. The spool valve 14 switches the output direction of the pressure fluid by switching the position of the spool 20 according to switching between the communication state and the communication cutoff state of the input port 24 and the pilot chamber 32. The valve body 12 is formed with a storage hole 18 for storing the cylindrical portion 54 of the cylindrical member 52 of the electromagnetic valve 16 and the spool 20. A second pilot pressure supply channel 64 that supplies pressure fluid from the solenoid valve 16 to the pilot chamber 32 is formed by the outer peripheral surface of the electromagnetic valve 16 and the inner peripheral surface of the storage hole 18.

  In the present embodiment, the spool valve 14 is disposed on the central axis A3 of the electromagnetic valve 16. Specifically, the solenoid valve 16 and the spool valve 14 are arranged so that the center axis A3 of the solenoid valve 16 and the center axis A2 of the spool valve 14 are located on the same straight line (on the center axis A1 of the storage hole 18). The That is, the spool valve 14 and the electromagnetic valve 16 are not arranged in parallel but are arranged in series. With this configuration, the valve body 12 can be thinned, and as a result, the pressure fluid control device 10 can be thinned.

  In the present embodiment, a flat chamfered portion 54 a is formed on the outer peripheral surface of the cylindrical portion 54 of the cylindrical member 52. A second pilot pressure supply flow path 64 is formed by the surface of the flat portion 54 a and the inner peripheral surface of the storage hole 18 that stores the cylindrical portion 54 of the cylindrical member 52. The pilot pressure output port 62 of the electromagnetic valve 16 and the pilot chamber 32 of the spool valve 14 communicate with each other through the second pilot pressure supply channel 64. That is, it is not necessary to form a pilot pressure supply channel in the valve body 12 for supplying the pressure fluid output from the electromagnetic valve 16 to the pilot chamber 32. With such a configuration, the valve body 12 can be thinned, and the pressure fluid control device 10 itself can be thinned.

  In the present embodiment, a pilot pressure supply flow path is not formed inside the electromagnetic valve 16, but a bypass (second pilot pressure supply flow path 64) communicating with the pilot chamber 32 is provided outside the electromagnetic valve 16. It is formed. Such a configuration facilitates the design and processing of the second pilot pressure supply channel 64. In particular, the design and processing of the second pilot pressure supply flow path 64 become easier by utilizing the flattening that is easy to process.

  In the present embodiment, the pilot chamber 32 is constituted by the lower end surface 60 of the cylindrical member 52 of the electromagnetic valve 16, the inner peripheral surface of the storage hole 18, and the surface of the spool upper end portion 36 (including the convex portion 38) of the spool valve 14. Is defined. Such a configuration facilitates processing of the valve body 12. Further, since the solenoid valve 16 and the spool valve 14 are connected without any member interposed therebetween, the pressure fluid control device 10 can be shortened.

[Modification]
Various modifications can be considered for the pressure fluid control apparatus 10 according to the present embodiment. For example, in the pressure fluid control device 10 shown in FIG. 1, the valve stem 80 and the movable core 108 are separate bodies. However, the valve stem 80 and the movable core 108 may be integrated. Further, the pilot pressure may be supplied and shut off directly by the valve rod 80 or the movable core 108 instead of by the valve body 78.

  The pressure fluid control apparatus 10 shown in FIGS. 1 and 3 includes the solenoid valve 16 and the spool valve 14 so that the center axis A2 of the spool valve 14 and the center axis A3 of the solenoid valve 16 are positioned on the center axis A1 of the storage hole 18. Is placed. However, at least if the spool valve 14 is arranged on the central axis A3 of the electromagnetic valve 16, the effect of making the entire apparatus thinner as compared with an apparatus in which the electromagnetic valve 16 and the spool valve 14 are arranged in parallel. Can be expected to some extent. In this case, it is desirable that the central axis A3 of the electromagnetic valve 16 and the central axis A2 of the spool valve 14 are parallel to each other. For example, one of the center axis A2 of the spool valve 14 and the center axis A3 of the electromagnetic valve 16 may be located on the center axis A1 of the storage hole 18.

  In the pressure fluid control apparatus 10 shown in FIG. 1, a flattened portion 54 a is formed on the outer peripheral surface of the cylindrical portion 54 of the cylindrical member 52, and the bypass (first 2 pilot pressure supply channels 64) are formed. However, instead of forming the flat portion 54 a in the cylindrical portion 54, a recess is formed in the inner peripheral surface of the storage hole 18, and a bypass is formed by this concave portion and the outer peripheral surface of the cylindrical portion 54 of the cylindrical member 52. May be.

  In addition, the flat chamfered portion 54a is not formed on the outer peripheral surface of the cylindrical portion 54 of the cylindrical member 52, but a curved surface or a groove may be formed. In this case, a bypass is formed by the curved surface or groove and the inner peripheral surface of the storage hole 18.

DESCRIPTION OF SYMBOLS 10 ... Pressure fluid control apparatus 12 ... Valve body 14 ... Spool valve 16 ... Solenoid valve 18 ... Storage hole 20 ... Spool 24 ... Input port 26 ... 1st output port 28 ... 2nd output port 32 ... Pilot chamber 36 ... Spool upper end part DESCRIPTION OF SYMBOLS 50 ... Valve part 52 ... Cylindrical member 54 ... Cylindrical part 54a ... Flat part 60 ... Lower end surface 62 ... Pilot pressure output port 64 ... 2nd pilot pressure supply flow path 70 ... Pilot pressure input port

Claims (4)

A solenoid valve that switches the communication state between the input port and the pilot chamber and the communication block state, and the output position of the pressure fluid by switching the position of the spool according to the switching between the communication state and the communication block state of the input port and the pilot chamber In a pressure fluid control device comprising a spool valve, and a valve body provided with the spool valve and the solenoid valve,
A storage hole for storing the solenoid valve and the spool is formed in the valve body,
The spool valve is disposed on a central axis of the solenoid valve;
A pilot pressure supply flow path for supplying pressure fluid from the solenoid valve to the pilot chamber is formed by the outer peripheral surface of the electromagnetic valve and the inner peripheral surface of the storage hole. The pressure fluid control device according to claim 1,
The pressure fluid control device, wherein the solenoid valve and the spool valve are arranged so that a center axis of the solenoid valve and a center axis of the spool valve are located on the same straight line. In the pressure fluid control apparatus according to claim 1 or 2,
The pressure fluid control apparatus, wherein the outer peripheral surface of the electromagnetic valve forming the pilot pressure supply flow path has a flattened planar shape. In the pressure fluid control device according to any one of claims 1 to 3,
The pressure fluid control device, wherein the pilot chamber is defined by the end face of the electromagnetic valve, the inner peripheral face of the storage hole, and the end face of the spool.

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