JP6157666B1 - Pressure fluid control device - Google Patents

Abstract

In a solenoid valve, flow path design and processing are facilitated. A solenoid valve 10 is displaced when a bobbin 132 around which an electromagnetic coil 134 is wound, a fixed core 138 inserted into a hollow portion 130 of the bobbin 132, and energization or de-energization of the electromagnetic coil. The movable core 116 has a cylindrical member 64 (second fixed core) into which a part of the movable core 116 is inserted. A first pilot pressure input port 38 is formed in the valve body 22 that accommodates the tubular member 64, and a second pilot pressure input port 98 is formed in the tubular member 64. These ports 38 and 98 extend along a direction substantially orthogonal to the displacement direction of the movable core 116. [Selection] Figure 1

Description

The present invention relates to a pressure fluid control device including an electromagnetic valve .

  The electromagnetic valve includes an electromagnetic coil wound around a bobbin and a housing that houses the bobbin and the electromagnetic coil. The electromagnetic valve further includes a movable core, and the movable core compresses the coil spring at the same time as it is displaced from the initial position as the electromagnetic coil is energized. On the other hand, when the energization is stopped, the movable core returns to the initial position by being elastically biased from the extending coil spring.

  When the movable core is displaced in this way, the valve body is displaced integrally and is separated from or seated on the valve seat. Thereby, a solenoid valve will be in a valve opening state or a valve closing state.

  This type of electromagnetic valve is used as a pressure fluid control device in combination with a spool valve as described in Patent Document 1, for example. In this configuration, the solenoid valve serves to supply or stop supplying pilot pressure that displaces the spool in the spool valve.

Japanese Utility Model Publication No. 52-35532

  The pressure fluid control device described in Patent Document 1 is a so-called series arrangement in which a spool valve and an electromagnetic valve are arranged in a straight line. In this case, the flow path of the pressure fluid at the end of the electromagnetic valve, specifically, the flow path for supplying the pressure fluid for pilot pressure from the spool valve to the valve chamber of the electromagnetic valve, or the spool valve from the valve chamber of the electromagnetic valve A flow path or the like for supplying the pilot chamber is concentrated. In particular, when the size of the solenoid valve is reduced, the space for forming each flow path is limited, so that the design and processing of the flow path are complicated.

The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a pressure fluid control device including an electromagnetic valve that is easy to design a flow path and to provide the flow path by processing. To do.

In order to achieve the above object, a pressure fluid control device according to the present invention includes a bobbin around which an electromagnetic coil is wound,
A first fixed core inserted in the hollow portion of the bobbin;
A movable core that is inserted into the hollow portion and is displaced with energization and deenergization of the electromagnetic coil;
A second fixed core into which the movable core is inserted;
A valve body which is accommodated in the second fixed core and is displaced following the displacement of the movable core;
With
In the second fixed core, an electromagnetic fluid formed so that a pressure fluid supply passage for supplying pressure fluid to the valve portion extends along a direction substantially orthogonal to the displacement direction of the valve body portion. and wherein the Rukoto to have a valve.

  In the electromagnetic valve according to the related art, the pressure fluid supply passage for supplying the pressure fluid to the valve portion is formed so as to extend along the displacement direction of the movable core. On the other hand, in the present invention, the pressure fluid supply passage extends in a direction substantially orthogonal to the displacement direction of the movable core. Therefore, it is possible to avoid the concentration of the pressure fluid supply passage and another flow path (for example, the pressure fluid flow path derived from the valve portion of the electromagnetic valve).

  That is, according to the present invention, it is possible to avoid the concentration of a plurality of flow paths in a narrow space. Therefore, it becomes easy to design and process the flow path around the solenoid valve while reducing the size of the solenoid valve.

  Moreover, it is preferable that a 2nd fixed core consists of a member which integrally has the flange part contact | abutted to a bobbin, and the hollow part which accommodates a valve part. In this case, the number of parts is reduced as compared with the case where the flange portion and the hollow portion are provided as separate members (separate bodies). This makes it easier to assemble the solenoid valve and simplifies the assembly work.

  The electromagnetic valve configured as described above is used by being inserted into an attachment hole of an attachment object, for example. In this case, a sealing member for sealing the mounting hole is attached to the side wall. The number of seal members is preferably one. This is because the number of parts of the solenoid valve is further reduced.

  In addition, it is preferable that the valve body is a part of the movable core. In this case, separate members such as a valve stem and a valve body are not required. Accordingly, since the number of parts of the solenoid valve is further reduced, it is easier to assemble the solenoid valve, and the assembling work is further simplified.

A pressure fluid control apparatus according to the present invention includes an electromagnetic valve configured as described above,
A spool valve having a spool that is resiliently biased toward the pilot chamber by a resilient member;
A valve body provided with the spool valve and the solenoid valve;
With
A pressure fluid supply communication passage is formed in the valve body to supply the pressure fluid from the spool valve to the valve portion in communication with the pressure fluid supply passage.
The pressure fluid supply passage functions as a pilot pressure supply passage for supplying a pilot pressure to the pilot chamber of the spool valve,
The solenoid valve is characterized in that the input port of the valve body and the pilot chamber are switched to a communication state or a communication cut-off state.

  That is, the solenoid valve supplies pressure fluid as a pilot pressure to the spool valve. Along with this, the spool in the spool valve is displaced, so that the output of the pressure fluid is controlled.

  In this pressure fluid control device, the second fixed core may function as a stopper for blocking the spool. In this case, it is possible to set a limit on the amount of displacement of the spool without incorporating the stopper portion as a separate member, and thus with a simple configuration.

  According to the present invention, the pressure fluid supply passage for supplying the pressure fluid to the valve portion of the electromagnetic valve is formed so as to extend in a direction substantially orthogonal to the displacement direction of the movable core. For this reason, the flow path other than the pressure fluid supply path can be formed by a path different from the path of the pressure fluid supply path, so that the concentration of the flow paths can be avoided.

  Therefore, it becomes easy to design and process the flow path around the solenoid valve while reducing the size of the solenoid valve.

1 is an overall schematic longitudinal sectional view of a pressure fluid control apparatus configured to include an electromagnetic valve according to an embodiment of the present invention. It is a whole schematic longitudinal cross-sectional view which shows the valve opening state of the pressure fluid control apparatus of FIG. It is a whole schematic longitudinal cross-sectional view of the pressure fluid control apparatus comprised including the solenoid valve which concerns on another embodiment of this invention. It is a whole schematic longitudinal cross-sectional view which shows the valve opening state of the pressure fluid control apparatus of FIG.

Hereinafter, a preferred embodiment of the pressure fluid control apparatus according to the present invention will be described in detail with reference to the attached drawings, in relation to the electromagnetic valve constituting the pressure fluid control apparatus . In the present embodiment, the solenoid valve is installed in a so-called cartridge-type pressure fluid control device that is attached to the engine body of an engine that is a driving power source of an automobile and that is replaceable as a whole. Further, in the following description, “lower” and “upper” mean lower and upper in FIGS. 1 and 2, which is for ease of understanding, and when the pressure fluid control device is actually used. It does not define posture.

  FIG. 1 is an overall schematic longitudinal sectional view of a pressure fluid control device 12 configured to include an electromagnetic valve 10 according to the present embodiment. The pressure fluid control device 12 is inserted into a mounting hole 16 formed in the engine main body 14 and used to change the operating characteristics of the valve operating device of the engine mounted on the automobile. FIG. 1 shows the pressure fluid control device 12 in a valve-closed state.

  The pressure fluid control device 12 includes a spool valve 20 and a hollow and long valve main body 22 in addition to the electromagnetic valve 10. The spool valve 20 and the valve portion 24 (described later) of the electromagnetic valve 10 are accommodated in an accommodation hole 26 extending along the longitudinal direction of the valve body 22. A disk-shaped recess 28 that is depressed in a disk shape is formed on the bottom surface of the storage hole 26.

  In addition, an input port 30, an output port 32, and a release port 34 are formed in substantially the same phase on the side wall of the valve body 22 from below, and are approximately 180 ° with respect to these ports 30, 32, 34. A first pilot pressure output port 36 and a first pilot pressure input port 38 are formed on the side wall on the phase difference side. By these five ports 30, 32, 34, 36, 38, the inside of the valve body 22 (the storage hole 26) communicates with the outside.

  A recess 40 is formed on the side wall of the valve body 22 such that the bottom has a flat surface shape. The recess 40 is recessed toward the storage hole 26, and therefore, a clearance is formed between the bottom surface of the recess 40 in the recess direction and the inner wall of the mounting hole 16. This clearance becomes a flow path for pressure fluid (for example, hydraulic oil). Hereinafter, this clearance (flow path) is referred to as a “first pilot pressure supply flow path”, and its reference numeral is 42.

  The first pilot pressure output port 36 and the first pilot pressure input port 38 are formed on the bottom surface of the recess 40 in the depression direction.

  A first seal member 44 is mounted on the upper portion of the valve body 22. The first seal member 44 seals between the valve body 22 and the inner wall of the mounting hole 16. That is, the mounting hole 16 is sealed. In the present embodiment, the first seal member 44 is the only seal for sealing the attachment hole 16. In other words, no seal member other than the first seal member 44 is attached to the side wall of the valve body 22.

  The spool valve 20 provided at the lower part of the valve body 22 has a spool 50 accommodated in the accommodation hole 26. The spool 50 is formed of a hollow body having a substantially cylindrical shape in which a spring chamber 52 and a pressure fluid release channel 54 are integrally connected. The inner diameter of the spring chamber 52 is the same as that of the pressure fluid release channel 54. It is set larger than the inner diameter. Accordingly, a step is formed between the spring chamber 52 and the pressure fluid release channel 54.

  A first annular recess 56 and a second annular recess 58 are formed on the side wall of the spool 50 in this order from below. A lateral hole 60 is formed at a position corresponding to the second annular recess 58 to communicate the inside of the spool 50 (pressure fluid release channel 54) with the outside.

  Further, a convex portion 62 having a substantially cylindrical shape protrudes from the upper end surface of the spool 50. The convex portion 62 abuts on the lower end surface 65 of the cylindrical member 64 (second fixed core) constituting the electromagnetic valve 10, so that the spool 50 is blocked and further displacement is prevented. In addition, a throttle 66 is formed in the convex portion 62 so as to be continuous with the pressure fluid release channel 54.

  A pilot chamber 68 is formed between the upper end surface of the spool 50 and the lower end surface 65 of the cylindrical member 64. The spool 50 is pressed downward by the pressure fluid supplied to the pilot chamber 68.

  In the spool 50 configured as described above, the spring chamber 52 accommodates the first coil spring 70 whose lower end is seated on the bottom surface of the disk-shaped recess 28 and whose upper end is seated on the stepped portion. Accordingly, the spool 50 is elastically biased toward the electromagnetic valve 10 by the first coil spring 70.

  As shown in FIG. 1, when the input port 30 and the pilot chamber 68 are in the communication cut-off state, the spool 50 cuts off the communication between the input port 30 and the output port 32 and communicates the output port 32 and the release port 34. It becomes. On the other hand, when the input port 30 and the pilot chamber 68 are in communication with each other, as will be described later, the input port 30 and the output port 32 are in communication with each other, and the communication between the output port 32 and the release port 34 is cut off (see FIG. (See FIG. 2). At this time, the pilot chamber 68 communicates with the pressure fluid release channel 54 via the throttle 66.

  The electromagnetic valve 10 includes the valve portion 24 accommodated in the accommodation hole 26 of the valve body 22 and a solenoid portion 80 disposed above the valve portion 24 and exposed from the valve body 22. In the present embodiment, the electromagnetic valve 10 is a two-way valve.

  The tubular member 64 is made of a magnetic material and is positioned and fixed with respect to the valve body 22. The cylindrical member 64 functions as a yoke of the solenoid unit 80, in other words, as a second fixed core, in a state of being positioned and fixed in this way.

  The cylindrical member 64 has a bottomed cylindrical cylindrical portion 82 (hollow portion) inserted into the storage hole 26 and a large diameter protruding outward in the diameter direction from the side wall near the upper end portion of the cylindrical portion 82. The flange portion 84 is integrally formed. That is, the cylindrical member 64 (second fixed core) is formed of one member having the cylindrical portion 82 and the flange portion 84 as parts. The lower end surface of the flange portion 84 abuts on the upper end surface of the valve body 22, and an annular second seal member 86 is interposed between the flange portion 84 and the valve body 22. The storage hole 26 is sealed by this intervention.

  The cylindrical portion 82 is formed of a hollow body in which a valve storage hole 88 extending along the longitudinal direction of the cylindrical portion 82 is formed. The cylindrical portion 82 is formed with a flattened portion 90 that is flattened from the lower end surface to the side wall. The flattening portion 90 is formed with a second pilot pressure output port 92 communicating with the valve storage hole 88. The side wall of the cylindrical portion 82 is a curved surface along the inner wall of the storage hole 26 at a portion other than the flattening portion 90. On the other hand, the flattening part 90 is a plane as described above. For this reason, in the state in which the cylinder part 82 is inserted in the storage hole 26, the flattening part 90 and the inner wall of the storage hole 26 do not contact.

  That is, a predetermined gap is formed between the flattening portion 90 and the inner wall of the storage hole 26. This gap functions as a second pilot pressure supply flow path 94 that communicates the second pilot pressure output port 92 and the pilot chamber 68.

  A second pilot pressure input port 98 (pressure fluid supply passage) communicating with the first pilot pressure input port 38 (pressure fluid supply communication passage) is located at a position where the phase difference is approximately 180 ° with respect to the flattening portion 90. It is formed.

  Here, both the first pilot pressure input port 38 and the second pilot pressure input port 98 extend in a direction substantially orthogonal to the longitudinal directions of the valve body 22 and the cylindrical portion 82. That is, the first pilot pressure input port 38 and the second pilot pressure input port 98 are formed so as to extend along a lateral direction substantially orthogonal to the vertical direction in FIGS. 1 and 2.

  The inner diameter of the valve housing hole 88 is increased in three stages in order from the bottom. That is, the valve storage hole 88 has a small diameter part 100, a medium diameter part 102, a tapered enlarged diameter part 104, and a large diameter part 106. The second pilot pressure input port 98 is opened so as to be substantially orthogonal to the lowermost small diameter portion 100.

  Further, the valve seat member 110 is press-fitted into the middle diameter portion 102. The lower end surface of the valve seat member 110 is positioned and fixed by contacting an annular step formed by the small diameter portion 100 and the medium diameter portion 102. The valve seat member 110 is formed with a valve hole 112 penetrating in the vertical direction. A valve seat 114 is formed in the upper opening of the valve hole 112, and the valve body 118 of the movable core 116 is seated on or separated from the valve seat 114. The tip of the valve body 118 is processed into a substantially conical shape corresponding to the shape of the valve seat 114.

  One end of the second pilot pressure output port 92 is opened by a tapered enlarged diameter portion 104. For this reason, when the valve body 118 of the movable core 116 is seated on the valve seat 114, the communication between the second pilot pressure input port 98 and the second pilot pressure output port 92 is blocked (see FIG. 1). On the other hand, when the valve body 118 of the movable core 116 is separated from the valve seat 114, the second pilot pressure input port 98 and the second pilot pressure output port 92 communicate with each other (see FIG. 2).

  The lower end portion of the movable core 116 is inserted into the large diameter portion 106 together with the collar member 120 made of a non-magnetic material. Of course, a through-hole for passing the valve body 118 is formed through the bottom surface of the collar member 120. A valve chamber 122 is formed by the upper end surface of the valve seat member 110 and the lower end surface of the collar member 120.

  The solenoid unit 80 constituting the electromagnetic valve 10 is formed of a hollow body 130 and has a substantially cylindrical bobbin 132 and an electromagnetic coil 134 wound around the bobbin 132. The movable core 116 and the fixed core 138 (first fixed core) housed in the unit 130 are included.

  The lower end surface of the bobbin 132 is in contact with the flange portion 84 of the tubular member 64 via the third seal member 140. The third seal member 140 provides a seal between the bobbin 132 and the tubular member 64. Further, the large-diameter collar portion of the collar member 120 is sandwiched between the bobbin 132 and the upper end surface of the cylindrical portion 82 of the cylindrical member 64.

  The bobbin 132 is made of resin and is accommodated in the housing 142 in a state where the electromagnetic coil 134 is wound. Specifically, the lower end of the housing 142 is crimped to the upper end portion of the valve body 22, whereby the housing 142 is supported by the valve body 22 and the bobbin 132 is connected to the flange portion 84 and the upper end portion of the valve body 22. Together with the housing 142.

  The upper end surface of the bobbin 132 is in contact with the ceiling surface of the housing 142, and an annular fourth seal member 144 is provided therebetween. The fourth seal member 144 provides a seal between the bobbin 132 and the housing 142. A lead-out port 146 is formed in a part of the side surface of the housing 142, and a coupler 148 integrated with the bobbin 132 protrudes from the lead-out port 146. In the coupler 148, a power feeding terminal 150 electrically connected to the electromagnetic coil 134 is provided.

  The upper end portion of the movable core 116 and the fixed core 138 are inserted into the hollow portion 130 of the bobbin 132. The valve body 118 protrudes from the lower end surface of the movable core 116 toward the valve seat 114, while a columnar protrusion 154 toward the fixed core 138 protrudes from the upper end surface.

  On the other hand, a bottomed spring storage hole 156 is formed in the fixed core 138, and the second coil spring 158 is stored in the spring storage hole 156. That is, the lower end of the second coil spring 158 is seated on the upper end surface of the movable core 116, and the columnar protrusion 154 is inserted therein. On the other hand, the upper end surface is seated on the ceiling surface of the spring storage hole 156. Therefore, the second coil spring 158 elastically biases the valve body 118 of the movable core 116 toward the valve seat 114 side.

  The electromagnetic valve 10 according to the present embodiment is basically configured as described above. Next, the function and effect will be described in relation to the operation of the pressure fluid control device 12.

  The pressure fluid control device 12 is attached to the engine body 14 by inserting the valve body 22 into the mounting hole 16 of the engine body 14 and positioning and fixing the housing 142 to the engine body 14. At this time, the mounting hole 16 is sealed by the first seal member 44.

  When the electromagnetic coil 134 is not energized, no magnetism is generated in the electromagnetic coil 134. For this reason, the attractive force based on the magnetic force does not act on the movable core 116. On the other hand, an elastic urging force by the second coil spring 158 acts on the movable core 116. By this bullet urging force, the movable core 116 is pushed down to the valve seat member 110 side. As a result, the valve body 118 is seated on the valve seat 114. That is, the solenoid valve 10 is in a closed state.

  When the electromagnetic valve 10 is in the closed state, the movable core 116 is elastically biased toward the valve seat member 110 by the elastic biasing force of the second coil spring 158 with respect to the movable core 116. Therefore, the valve body 118 of the movable core 116 is seated on the valve seat 114, and the communication between the valve hole 112 and the valve chamber 122 is blocked.

  On the other hand, the pilot chamber 68 communicates with the release port 34 via a flow path formed by the throttle 66 formed in the convex portion 62 of the spool 50, the pressure fluid release flow path 54, and the lateral hole 60. For this reason, the pilot chamber 68 has the same pressure as the release port 34.

  At this time, the elastic urging force of the first coil spring 70 on the spool 50 exceeds the pressing force on the spool 50 by the pressure fluid in the pilot chamber 68. Therefore, the spool 50 is in the uppermost position where the upper end surface of the convex portion 62 contacts the lower end surface 65 of the cylindrical member 64. Accordingly, the input port 30 is blocked by the large-diameter side wall of the spool 50, and therefore, the communication between the input port 30 and the output port 32 is blocked. On the other hand, the output port 32 and the release port 34 communicate with each other through a flow path formed between the first annular recess 56 and the storage hole 26. Therefore, when the electromagnetic coil 134 is not energized, the pressure fluid supplied from a pressure fluid supply source (not shown) is not introduced into the valve body 22.

  On the other hand, when the electromagnetic coil 134 is energized through the power supply terminal 150, magnetism is generated particularly in the flange portion 84 of the electromagnetic coil 134, the fixed core 138, and the cylindrical member 64 (second fixed core). Since the magnetic attractive force exceeds the elastic urging force of the second coil spring 158, the movable core 116 is attracted and displaced toward the fixed core 138, that is, upward. Accordingly, the valve body 118 is displaced integrally with the movable core 116 and is separated from the valve seat 114. That is, the solenoid valve 10 is opened.

  As can be understood from this, the movable core 116 is displaced along the longitudinal direction of the valve body 22 and the cylindrical portion 82. Therefore, the extending directions of the first pilot pressure input port 38 and the second pilot pressure input port 98 are substantially orthogonal to the displacement direction of the movable core 116. The upper end portion of the movable core 116 is inserted into the hollow portion 130 of the bobbin 132, and the lower end portion is inserted into the large-diameter portion 106 (valve housing hole 88) of the cylindrical member 64 via the collar member 120. The movable core 116 is guided by the tubular member 64 and the inserted collar member 120 when displaced.

  At this time, pressure fluid is introduced from the input port 30. This is because the spool 50 is displaced and the position of the first annular recess 56 becomes a position corresponding to the input port 30 as will be described later. The pressure fluid introduced from the input port 30 passes through the first pilot pressure supply passage 42 from the first pilot pressure output port 36, and further, the first pilot pressure input port 38 and the second pilot pressure input port 98. And then reaches the small diameter portion 100 of the valve storage hole 88.

  As described above, since the valve body portion 118 is separated from the valve seat 114, the small diameter portion 100 communicates with the valve chamber 122 through the valve hole 112. Therefore, the pressure fluid is supplied to the valve chamber 122 and then supplied to the pilot chamber 68 via the second pilot pressure output port 92 and the second pilot pressure supply flow path 94.

  When the pressing force of the pressure fluid supplied to the pilot chamber 68 exceeds the elastic biasing force of the first coil spring 70 to the spool 50, the spool 50 is pressed and displaced downward, and the lower end surface of the storage hole 26 is Contact the bottom. That is, the spool 50 is in the lowest position. At this time, the horizontal hole 60 becomes a position corresponding to the position of the release port 34.

Accordingly, the input port 30 and the output port 32 communicate with each other through the flow path constituted by the second annular recess 58 and the storage hole 26 , while the communication between the output port 32 and the release port 34 is blocked. The That is, in the open state, the pressure fluid supplied from the input port 30 is supplied to the pilot chamber 68 and led out from the output port 32. Excess pressure fluid supplied to the pilot chamber 68 is led out from the restriction port 66 through the pressure fluid release passage 54 and the lateral hole 60 from the release port 34.

  The output of the pressure fluid is controlled by switching the port from which the pressure fluid is output by operating the spool valve 20 as described above. As a result, the valve gear constituting the engine can be changed to a desired power characteristic.

  When energization of the electromagnetic coil 134 is stopped, the magnetism disappears and the attractive force with respect to the movable core 116 disappears. For this reason, the movable core 116 is elastically biased by the second coil spring 158, and as a result, the valve body 118 is pushed down integrally with the movable core 116 to return to the state shown in FIG. That is, the valve body 118 is seated on the valve seat 114 and the electromagnetic valve 10 is closed.

  At this time, the pressure fluid in the pilot chamber 68 is pressed by the rising spool 50. Accordingly, the pressure fluid is led out from the release port 34 through the throttle 66, the pressure fluid release flow path 54, and the lateral hole 60. Further, the pressure fluid remaining in the flow path constituted by the second annular recess 58 and the storage hole 26 is also discharged from the release port 34.

  The convex portion 62 on the upper end surface of the spool 50 abuts on the lower end surface 65 of the cylindrical portion 82. Thereby, the spool 50 is blocked and further displacement of the spool 50 is prevented. That is, the cylindrical member 64 functions as a stopper that prevents the spool 50 from being displaced more than necessary.

  By the way, in the present embodiment, the first pilot pressure input port 38 and the second pilot pressure input port 98 which are flow paths to be supplied from the spool valve 20 to the electromagnetic valve 10 are substantially set with respect to the displacement direction of the movable core 116. It extends in the orthogonal direction. For this reason, even if it is a case where the solenoid valve 10 and the spool valve 20 are connected without interposing a member like this Embodiment, it can avoid that a some flow path concentrates. Accordingly, while the pressure fluid control device 12 is reduced in size by reducing the dimension along the longitudinal direction, for example, the first pilot pressure input port 38 and the second pilot pressure input port 98 or the solenoid valve 10 to the spool valve are used. It becomes easy to form various flow paths such as a flow path for supplying pressure fluid to the 20 pilot chambers 68.

  In particular, in the present embodiment, the first pilot pressure supply passage 42 communicating with the pilot chamber 68 is formed along the longitudinal direction of the side wall of the valve body 22. Therefore, the design of the path of the first pilot pressure input port 38 and the second pilot pressure input port 98 and the processing of these ports 38 and 98 are easy.

  In this case, the first pilot pressure supply channel 42 is formed by the same leveling process as the leveling part 90, so that the path design and processing of the first pilot pressure input port 38 and the second pilot pressure input port 98 can be performed. It becomes even easier.

  Moreover, the cylindrical member 64 which is a 2nd fixed core has the cylinder part 82 and the flange part 84 integrally. For this reason, the number of parts can be reduced. As a result, it is easy to assemble the electromagnetic valve 10 and the assembly work is simplified.

Furthermore, in the present embodiment, the first seal member 44 is the only seal member for sealing the attachment hole 16 . In addition, the movable core 116 is provided with a valve body 118, which eliminates the need for separate members such as a valve stem and a valve body. In combination with the above, the number of parts of the solenoid valve 10 (pressure fluid control device 12) can be further reduced. As a result, it is easier to assemble the solenoid valve 10, and the assembly work is further simplified.

  The present invention is not particularly limited to the above-described embodiment, and various modifications can be made without departing from the gist of the present invention.

  For example, the first pilot pressure supply channel 42 may be formed inside the valve body 22.

  Further, instead of the movable core 116, a movable core in which the valve body 118 is not provided may be adopted. That is, the movable core and the valve body may be separate members. In this case, another member such as a valve rod may be interposed between the movable core and the valve body. Furthermore, you may make it comprise the pressure fluid control apparatus containing an electromagnetic valve as a three-way valve.

  This example is shown in FIGS. 3 and 4 as another embodiment. In addition, since constituent elements other than the constituent elements described later are basically the same as the constituent elements of the pressure fluid control device 12, detailed description with reference numerals will be omitted. Moreover, although the same name is used for the component corresponding to the component shown in FIG.1 and FIG.2, another reference code is attached for convenience.

  A first output port 184, an input port 186, a second output port 188, and a release port 190 are formed from below in the valve main body 182 of the pressure fluid control device 180 shown in FIG. The valve portion 192 includes a first valve seat member 196, a second valve seat member 198, a ball-shaped valve body 200, and a valve stem 202 which are accommodated in the valve accommodation hole 194 of the cylindrical member 193 (second fixed core). , Bearing 204 and guide 206.

  When the electromagnetic coil 208 is not energized, the valve stem 202 receives the elastic urging force of the second coil spring 212 via the lower end surface of the movable core 210 and pushes down the valve body 200 at the lower end surface to The valve body 200 is seated on the first valve seat of the first valve seat member 196. For this reason, the solenoid valve 214 is in a closed state. At this time, the input port 186 communicates with the second output port 188 and the first output port 184 communicates with the release port 190.

  On the other hand, when the electromagnetic coil 208 is energized, the movable core 210 is attracted by the magnetic force and displaced upward against the elastic urging force of the second coil spring 212 as shown in FIG. For this reason, the valve body 200 is pressed by the pressure fluid that has reached the small-diameter hole 215, separated from the first valve seat of the first valve seat member 196, and then seated on the second valve seat of the second valve seat member 198. .

  That is, the electromagnetic valve 214 is opened. As a result, the second pilot pressure input port 216 communicates with the pilot chamber 220 via the valve chamber 218 in the first valve seat member 196, so that pressure fluid is supplied to the pilot chamber 220.

  Accordingly, the spool 224 constituting the spool valve 222 is displaced downward against the elastic biasing force of the first coil spring 226. At this time, the input port 186 communicates with the first output port 184 and the second output port 188 communicates with the release port 190.

  Also in this other embodiment, the first pilot pressure input port 227 and the second pilot pressure input port 216 extend in a direction substantially orthogonal to the displacement direction of the movable core 210. Further, the seal member provided on the valve body 182 is only the first seal member 228. Therefore, the same effect as the above-described embodiment can be obtained.

  Of course, both of the solenoid valves 10 and 214 shown in the above two embodiments can be used alone.

DESCRIPTION OF SYMBOLS 10, 214 ... Solenoid valve 12, 180 ... Pressure fluid control apparatus 16 ... Mounting hole 20, 222 ... Spool valve 22 ... Valve body 24, 192 ... Valve part 30, 186 ... Input port 32, 184, 188 ... Output port 34, 190 ... Release port 36 ... First pilot pressure output port 38, 227 ... First pilot pressure input port 42 ... First pilot pressure supply passage 44, 228 ... First seal member 50, 224 ... Spool 64, 193 ... Tubular Member 68, 220 ... Pilot chamber 70, 226 ... First coil spring 80 ... Solenoid part 82 ... Tube part 84 ... Flange part 90 ... Flattening part 92 ... Second pilot pressure output port 94 ... Second pilot pressure supply flow path 98 216, second pilot pressure input ports 110, 196, 198, valve seat member 112, valve hole 114, valve seats 116, 21 ... movable core 118 ... valve body 130 ... hollow portion 132 ... bobbin 134,208 ... electromagnetic coil 138 ... fixed core 142 ... housing 158,212 ... second coil spring 200 ... valve body 202 ... valve stem

Claims (5)

A solenoid valve;
A spool valve having a spool that is resiliently biased toward the pilot chamber by a resilient member;
A valve body provided with the spool valve and the solenoid valve;
A pressure fluid control device comprising:
The solenoid valve is
A bobbin around which an electromagnetic coil is wound;
A first fixed core inserted in the hollow portion of the bobbin;
A movable core that is inserted into the hollow portion and is displaced with energization and deenergization of the electromagnetic coil;
A second fixed core into which the movable core is inserted;
A valve body which is accommodated in the second fixed core and is displaced following the displacement of the movable core;
With
Wherein the second fixed core, a pressurized fluid supply passage for supplying pressure fluid to the valve portion is formed so as to extend along a direction substantially orthogonal to the displacement direction of the valve body portion ,
A pressure fluid supply communication passage is formed in the valve body to supply the pressure fluid from the spool valve to the valve portion in communication with the pressure fluid supply passage.
The pressure fluid supply passage functions as a pilot pressure supply passage for supplying a pilot pressure to the pilot chamber of the spool valve,
The solenoid valve is a pressure fluid control apparatus according to claim Rukoto switching the input port and the pilot chamber of the valve body in communication with or connection cutoff state. In pressure fluid control apparatus according to claim 1, wherein the pressure second fixed core, characterized by comprising a member having a hollow portion integrally accommodating abutting flange portion, said valve portion to said bobbin Fluid control device . The pressure fluid control apparatus according to claim 1 or 2, wherein the pressure fluid control apparatus is inserted into an attachment hole of an attachment object, and only one seal member for sealing the attachment hole is attached to a side wall thereof. A pressure fluid control device . The pressure fluid control apparatus of any one of Claims 1-3 WHEREIN: The said valve body part is one site | part of the said movable core, The pressure fluid control apparatus characterized by the above-mentioned. In the pressure fluid control system as claimed in any one of claims 1 to 4, the pressure fluid control device, wherein the second fixed core functions as a stopper for damming the spool.

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