JP2018066418A - Solenoid selector valve - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a solenoid selector valve which can increase a flow rate while suppressing an increase in electric power consumption.SOLUTION: An electromagnet 5A is formed by consecutively installing a second electromagnet part 7A axially outward of a first electromagnet part 6A that is adjacent to a valve body 1. A solenoid selector valve has a switching state of switching and providing communication between a plurality of flow passages by a valve element 2 and a holding state of holding the switching state. In the first electromagnet part 6A and the second electromagnet part 7A, both electromagnet parts 6A, 7A are energized in the switching state, and the first electromagnet part 6A is energized in the holding state. Accordingly, in the holding state, an increase in electric power consumption can be suppressed by the energization of the single electromagnet part 6A, and in the switching state, large attractive force can be obtained by the energization of both electromagnet parts 6A, 7A.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an electromagnetic switching valve that switches and communicates between a plurality of flow paths by operating a valve body with an electromagnet.

  A conventional electromagnetic switching valve has a movable iron core that is inserted into a valve body with a spool-like valve body slidably in the axial direction and energized to one of electromagnets provided on both sides of the valve body to be attracted to a fixed iron core. The valve body is pressed toward one switching position, or the valve body is pressed toward the other switching position with a movable iron core energized by the other electromagnet and attracted to the fixed iron core. The communication between the roads is switched (see, for example, Patent Document 1).

Japanese Patent Laying-Open No. 2015-68459 (FIG. 1)

  However, in the electromagnetic switching valve disclosed in Patent Document 1, in order to increase the flow rate, when the stroke of the valve body is lengthened to increase the opening amount between the valve body and the flow path, the flow path is connected to the valve body. The fluid force acting in the direction of closing the opening between the two increases, and an electromagnet that generates a large attractive force to overcome this fluid force is required, resulting in an increase in power consumption.

  The subject of this invention is providing the electromagnetic switching valve which can suppress the increase in power consumption and can increase a flow volume.

In order to achieve this problem, the present invention has taken the following measures. That is,
A valve body is slidably inserted in the valve body in the axial direction, and an electromagnet that operates the valve body when energized is provided on the side of the valve body. In the electromagnetic switching valve that is in communication, the electromagnet is configured by connecting the second electromagnet portion in an axially outward direction of the first electromagnet portion adjacent to the valve body, and the first electromagnet portion is the first by the attractive force generated by energization. A first fixed iron core that sucks the movable iron core is fixed to the side surface of the valve body, and the first movable iron core is fitted to the cylindrical member so as to be slidable in the axial direction so as to face the first fixed iron core. And the valve body are engaged through a first pin member penetrating the first fixed iron core, and the second electromagnet portion has a second fixed iron core that attracts the second movable iron core with a suction force generated by energization. 1 Fixed to the cylindrical member outside the movable core in the axial direction, and the second movable core is slidable in the axial direction facing the second fixed core. The first electromagnet part and the second electromagnet part are large, and are engaged with each other via a second pin member penetrating the second fixed iron core between the second movable iron core and the first movable iron core. The electromagnetic switching valve is characterized in that it has a switching state in which a plurality of flow paths are switched and communicated by a valve body with a suction force and a holding state in which the switching state is held with a suction force smaller than the switching state.

  In this case, the first electromagnet part and the second electromagnet part may energize both electromagnet parts in the switching state and energize any one electromagnet part in the holding state. Further, the first electromagnet part and the second electromagnet part energize one of the electromagnet parts in the switching state, and de-energize any one of the electromagnet parts energized in the switching state in the holding state. As an alternative, the other electromagnet part may be energized. The first electromagnet part and the second electromagnet part include a stroke amount for attracting the first movable iron core to the first fixed iron core, and a stroke amount for attracting the second movable iron core to the second fixed iron core. May be substantially the same. The first electromagnet portion may be energized in the holding state.

  As described in detail above, in the first aspect of the present invention, the electromagnet is configured by continuously connecting the second electromagnet portion outward in the axial direction of the first electromagnet portion adjacent to the valve body. A first fixed iron core that sucks the first movable iron core with a suction force generated by energization is fixed to the side surface of the valve body, and the first movable iron core is opposed to the first fixed iron core and is slidable in the axial direction. The first movable iron core and the valve body are engaged with each other via a first pin member penetrating the first fixed iron core, and the second electromagnet portion is attracted by energization to generate the second movable iron core. The second fixed iron core that sucks in is fixed to the cylindrical member outside the first movable iron core in the axial direction, and the second movable iron core is fitted to the cylindrical member so as to be slidable in the axial direction facing the second fixed iron core. And engaging between the second movable iron core and the first movable iron core via a second pin member penetrating the second fixed iron core, the first electromagnet portion and the second electromagnet portion. The Ishibe had a switching state of switching 換連 communicating between a plurality of flow paths by the valve body with a large suction force, and a holding state for holding the switching state with a small suction force from switching state. For this reason, in the holding state, electricity is supplied with a smaller attractive force than in the switching state, so that an increase in power consumption can be suppressed. And in the switching state, since it energizes with a big suction force, it can overcome a big fluid force and can enlarge the amount of opening between a valve element and a channel, and can increase a flow rate.

  In the invention according to claim 2, the first electromagnet part and the second electromagnet part energize both electromagnet parts in the switching state and energize any one electromagnet part in the holding state. For this reason, in the holding state, since any one electromagnet part is energized, an increase in power consumption can be suppressed. In the switching state, since both the electromagnet portions are energized, a large suction force can be obtained, the large fluid force can be overcome and the opening amount between the valve body and the flow path can be increased, and the flow rate can be increased. Can be increased.

  According to a third aspect of the present invention, the first electromagnet part and the second electromagnet part either energize one of the electromagnet parts having a large attractive force in the switching state and energize in the switching state in the holding state. Either one of the electromagnet portions was deenergized, and the other electromagnet portion having a smaller attractive force than the switching state was energized. For this reason, in the holding state, since an electromagnet portion having a smaller attractive force than that in the switching state is energized, an increase in power consumption can be suppressed. In the switching state, since the electromagnet portion having a large attractive force is energized, the amount of opening between the valve body and the flow path can be increased by overcoming the large fluid force, and the flow rate can be increased.

  According to a fourth aspect of the present invention, the first electromagnet part and the second electromagnet part attract the first movable iron core to the first fixed iron core and the second movable iron core to the second fixed iron core. Stroke amount is almost the same. For this reason, a large suction force can be obtained over the entire stroke.

  In the invention according to claim 5, the first electromagnet portion is energized in the holding state. For this reason, since the second electromagnet portion is not energized in the holding state, there is no problem even if the second movable iron core is disengaged from the first movable iron core via the second pin member, and the second electromagnet portion is appropriately selected according to the application. The stroke amount can be shortened.

It is a longitudinal cross-sectional view of the electromagnetic switching valve which showed one Embodiment of this invention. It is an electric circuit diagram of one embodiment. It is the graph which showed the attraction | suction force of one Embodiment, the fluid force, the spring force, power consumption, and the relationship of electricity supply of both electromagnet parts, and a non-energization. It is the graph which showed the attraction | suction force, fluid force, spring force, power consumption of other embodiment, and the relationship of energization and non-energization of both electromagnet parts.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
1 and 2, reference numeral 1 denotes a valve body, which has a substantially rectangular parallelepiped shape, and has an insertion insertion hole 3 through which a spool-like valve body 2 is slidably inserted in the axial direction. Female threaded portions are respectively screwed into both end portions of the fitting insertion holes 3 that are open on both side surfaces of 1. A supply flow path P for supplying a pressure fluid is opened at a substantially central portion in the axial direction of the insertion hole 3, and a fluid actuator (not shown) is provided with gaps on both sides in the axial direction of connection points of the supply flow path P. And two discharge passages R1 and R2 connected to the low pressure side with a gap outward in the axial direction of both load passages A and B, respectively. It is open. The valve body 2 includes land portions 2A and 2B, and is held in a neutral position by springs 4A and 4B accommodated at both ends of the fitting insertion hole 3. In the neutral position, the supply flow path P is blocked and the load flow path A is blocked. The load channel B communicates with the discharge channel R1 and the discharge channel R2. Further, the valve body 2 switches and connects the supply flow path P to the load flow path A and discharges the load flow path B at one switching position shown in the upper half of FIG. 1 against the spring force of the spring 4A. Switch communication to R2. In the other switching position shown in the lower half of FIG. 1 against the spring force of the spring 4B, the valve body 2 switches the supply flow path P to the load flow path B and the load flow path A to the discharge flow path. Switch communication to R1.

5A and 5B are electromagnets provided on both sides of the valve body 1, and are composed of first electromagnet portions 6A and 6B and second electromagnet portions 7A and 7B.
In the following, since the electromagnets 5A and 5B have the same configuration, the electromagnet 5A will be described as a representative, and the electromagnet 5B is denoted by a reference numeral and description thereof is omitted.
In the electromagnet 5A, the first electromagnet portion 6A is adjacent to the valve body 1, and the second electromagnet portion 7A is continuously provided outward in the axial direction of the first electromagnet portion 6A. The first electromagnet portion 6A is a first fixed iron core 8A that is screwed into the female threaded portion of the insertion hole 3 and fixed to the side surface of the valve body 1, and is attracted to the first fixed iron core 8A by a suction force generated by energization. The movable iron core 9A is fitted to the cylindrical member 10A so as to be slidable in the axial direction facing the first fixed iron core 8A. The cylindrical member 10A is fixed to the first fixed iron core 8A by welding. Reference numeral 11A denotes a first pin member that penetrates the first fixed iron core 8A to engage the valve body 2 and the first movable iron core 9A, and the valve body 2 by the first movable iron core 9A sucked by the first fixed iron core 8A. Press. The first electromagnet portion 6A includes a coil bobbin 12A, a cylindrical yoke 13A, and a disk-shaped yoke 14A. The coil bobbin 12A is externally fitted to the cylindrical member 10A on the outer side in the radial direction of the first fixed iron core 8A and the first movable iron core 9A, and the coil 15A is wound between the flanges at both axial ends. The coil bobbin 12A has a flange on the valve body 1 side extending radially outward, and three connecting pins 16A, 17A, 18A (the connecting pins 17A, 18A are shown in FIG. 2) in the extending portion. It protrudes in the axial direction toward the valve body 1 side. The two connection pins 16A and 17A are electrically connected to the coil 15A, and the connection pin 17A serves as a common negative common terminal. The yoke 13A covers the outer periphery of the coil bobbin 12A, and a part on the valve body 1 side is cut away so that the extending part of the coil bobbin 12A can extend radially outward. The yoke 14A is externally fitted to the cylindrical member 10A adjacent to the axially outer sides of the coil bobbin 12A and the yoke 13A.

  The second electromagnet portion 7A has substantially the same configuration as the first electromagnet portion 6A, and the second fixed iron core 19A is fixed to the cylindrical member 10A on the outer side in the axial direction of the first movable iron core 9A. The second movable iron core 20A sucked into the two fixed iron cores 19A is fitted to the cylindrical member 10A so as to be slidable in the axial direction so as to face the second fixed iron cores 19A. Reference numeral 21A denotes a second pin member, which penetrates the second fixed iron core 19A to engage the first movable iron core 9A and the second movable iron core 20A, and is secondly moved by the second movable iron core 20A sucked by the second fixed iron core 19A. The valve body 2 is pressed through the 1 movable iron core 9A and the first pin member 11A. And the stroke amount which attracts | sucks the 2nd movable iron core 20A to the 2nd fixed iron core 19A is provided substantially the same as the stroke amount which attracts | sucks the 1st movable iron core 9A to the 1st fixed iron core 8A.

  The second electromagnet portion 7A has a coil bobbin 22A, a cylindrical yoke 23A, and a disk-shaped yoke 24A. The coil bobbin 22A is externally fitted to the cylindrical member 10A on the radially outer side of the second fixed iron core 19A and the second movable iron core 20A, and the coil 25A is wound between the flanges at both ends in the axial direction. The coil bobbin 22A extends radially outward from the flange on the valve body 1 side, and two extending connection pins 26A and 27A (connection pins 27A are shown in FIG. 2) electrically connected to the coil 25A. ) Protrudes outward in the axial direction. The connection pin 26A is electrically connected by a lead wire 28A to a connection pin 18A that is not electrically connected to the coil 15A of the first electromagnet portion 6A. The connection pin 27A is electrically connected by a lead wire 29A (shown in FIG. 2) to the connection pin 17A electrically connected to the coil 15A of the first electromagnet portion 6A as a common negative common. The yoke 23A covers the outer periphery of the coil bobbin 22A, and a part on the valve body 1 side is cut away so that the extending part of the coil bobbin 22A can extend radially outward. The yoke 24A is fitted on the cylindrical member 10A so as to be adjacent to the outside of the coil bobbin 22A and the yoke 23A in the axial direction.

  The cylindrical member 10 </ b> A has a lid member 30 </ b> A fixed to the axially outer end to close the opening. The lid member 30A is provided with a pressing pin member 31A that is manually pressed from the outside. The pressing pin member 31A is provided so that the valve body 2 can be pressed via the second movable iron core 20A, the second pin member 21A, the first movable iron core 9A, and the first pin member 11A. The first electromagnet portion 6A and the second electromagnet portion 7A include coil bobbins 12A and 22A, cylindrical yokes 13A and 23A, disk-shaped yokes 14A and 24A, coils 15A and 25A, connection pins 16A, 17A, 18A, 26A, and 27A. The lead wires 28A and 29A are integrally formed with a resin mold to form a coil block 32A. The coil block 32A is externally fitted to the cylindrical member 10A, and is sandwiched between the valve body 1 by a nut 33A screwed to the lid member 30A.

  A terminal box 34 is mounted and fixed on the valve body 1 and electrically connects the electromagnets 5A and 5B provided on both sides of the valve body 1 to an external power source (not shown). The terminal box 34 has an insertion part 35A for inserting the connection pins 16A, 17A, 18A of the electromagnet 5A on one side, and the connection pins 16B, 17B, 18B of the electromagnet 5B on the other side opposite to the one side. Insertion portion 35B. The terminal box 34 includes a connector 39A that is electrically connected to the insertion portion 35A and the internal wirings 36A, 37A, and 38A on one side above the insertion portion 35A. Further, the terminal box 34 includes a connector 39B that is electrically connected to the insertion portion 35B through the internal wirings 36B, 37B, and 38B on the other side above the insertion portion 35B. The connectors 39A and 39B are detachably mounted with electrical wiring from an external power source (not shown).

FIG. 3 shows the relationship between energization and non-energization of the attraction forces K and K1, fluid force F, spring forces S and S1, power consumption W and W1, and the first electromagnet portion 6A and the second electromagnet portion 7A.
When the first electromagnet part 6A and the second electromagnet part 7A are energized simultaneously, an attractive force K is generated. The suction force K is larger than the sum of the fluid force F and the spring force S of the spring 4B, and the valve body 2 is pressed toward the other switching position shown in the lower half of FIG. In the switching state, power consumption W occurs.

  Then, at the attracting point E in FIG. 3 where both movable iron cores 9A and 20A of both electromagnet parts 6A and 7A abut against both fixed iron cores 8A and 19A, the second electromagnet part 7A is deenergized and the first electromagnet part 6A is energized. If it continues, it will be in the holding state which hold | maintains a switching state. In the holding state, the attractive force K1 is only about the first electromagnet portion 6A and is about half that of the switching state, and is substantially constant. The spring force S1 of the spring 4B has a maximum value and is substantially constant. The suction force K1 is greater than the spring force S1 and continues to be held. The fluid force F does not occur and becomes zero because the valve body 2 has completed switching between the flow paths. In the holding state, the second electromagnet portion 7A is deenergized, so the power consumption W1 is about half that in the switching state.

Next, the operation of this configuration will be described.
The upper half of the valve body 2 in FIG. 1 shows a holding state in which the valve body 2 is switched to one switching position, and the electromagnet 5B energizes the first electromagnet portion 6B and the second electromagnet portion 7B. Is deenergized, the electromagnet 5A deenergizes the first electromagnet portion 6A and the second electromagnet portion 7A, and the valve body 2 switches the supply flow path P to the load flow path A and discharges the load flow path B. The communication is switched to the path R2.

  When the first electromagnet portion 6B of the electromagnet 5B is de-energized in this holding state, the valve body 2 is biased to the neutral position in FIG. 1 by the spring force of the spring 4A, and the supply flow path P is shut off. At the same time, the load channel A communicates with the discharge channel R1 and the load channel B communicates with the discharge channel R2.

  When both the first electromagnet portion 6A and the second electromagnet portion 7A of the electromagnet 5A are energized in this neutral position, the valve body 2 has both the movable iron cores 9A and 20A of the both electromagnet portions 6A and 7A and both fixed iron cores 8A and 19A. 1 is pressed to the right in FIG. 1 against the fluid force acting on the valve body 2 and the spring force of the spring 4B, and switched to the other switching position shown in the lower half of FIG. In the switching state, the supply flow path P is switched to the load flow path B and the load flow path A is switched to the discharge flow path R1.

  In this switching state, when the second electromagnet portion 7A of the electromagnet 5A is de-energized and the first electromagnet portion 6A is energized, the valve body 2 attracts the first movable iron core 9A to be attracted to the first fixed iron core 8A. Thus, a holding state is maintained in which the switching state is held against the spring force of the spring 4B, and the other switching position shown in the lower half of FIG. 1 is held.

  When the first electromagnet 6A of the electromagnet 5A is de-energized in this holding state, the valve body 2 is urged to the left in FIG. 1 by the spring force of the spring 4B to be in the neutral position.

  With this operation, the electromagnets 5A and 5B are configured by connecting the second electromagnet parts 7A and 7B to the outer sides in the axial direction of the first electromagnet parts 6A and 6B adjacent to the valve body 1, and the first electromagnet parts 6A and 6B. The first fixed iron cores 8A and 8B for sucking the first movable iron cores 9A and 9B by the suction force generated by energization are fixed to the side surface of the valve body 1, and the first movable iron cores 9A and 9B are fixed to the first fixed iron cores 8A and 8B. A first pin which is fitted to the cylindrical members 10A and 10B so as to be slidable in the axial direction so as to face the first pin and passes between the first movable iron cores 9A and 9B and the valve body 2 through the first fixed iron cores 8A and 8B. The second electromagnet portions 7A and 7B engage with each other through the members 11A and 11B, and the second fixed iron cores 19 and 19B that attract the second movable iron cores 20A and 20B with the attraction force generated by energization are used as the first movable iron core 9A, The second movable iron core is fixed to the cylindrical members 10A and 10B on the axially outward side of 9B. 0A and 20B are fitted to the cylindrical members 10A and 10B so as to be slidable in the axial direction so as to face the second fixed iron cores 19A and 19B, and between the second movable iron cores 20A and 20B and the first movable iron cores 9A and 9B. The first electromagnet parts 6A, 6B and the second electromagnet parts 7A, 7B are engaged with each other through a second pin member 21A, 21B passing through the second fixed iron cores 19A, 19B. 2 has a switching state in which the plurality of flow paths P, A, B, R1, and R2 are in communication with each other and a holding state in which the switching state is held with a suction force K1 smaller than that in the switching state. For this reason, in the holding state, electricity is supplied with a smaller suction force K1 than in the switching state, and therefore an increase in power consumption W1 can be suppressed. And in the switching state, since it is energized with a large suction force K, it can overcome the large fluid force F and increase the opening amount between the valve body 2 and the flow paths P, A, B, R1, R2, The flow rate can be increased.

  Further, the first electromagnet parts 6A, 6B and the second electromagnet parts 7A, 7B energize both electromagnet parts 6A, 6B and 7A, 7B in the switching state, and the first electromagnet parts 6A, 6B in the holding state. Energized. For this reason, in the holding state, since the first electromagnet portions 6A and 6B are energized as any one electromagnet portion, an increase in the power consumption W1 can be suppressed. In the switching state, since both the electromagnet portions 6A, 6B and 7A, 7B are energized, a large suction force K can be obtained, and the large fluid force F can be overcome and the valve body 2 and the flow path P, The opening amount between A, B, R1, and R2 can be increased, and the flow rate can be increased.

  Further, the first electromagnet parts 6A, 6B and the second electromagnet parts 7A, 7B include a stroke amount for attracting the first movable iron cores 9A, 9B to the first fixed iron cores 8A, 8B and the second movable iron cores 20A, 20B. The stroke amount sucked into the second fixed iron cores 19A and 19B was made substantially the same. For this reason, a large suction force can be obtained over the entire stroke.

  Further, the first electromagnet portions 6A and 6B were energized in the holding state. For this reason, since the second electromagnet portions 7A and 7B are not energized in the holding state, the second movable iron cores 20A and 20B are disengaged from the first movable iron cores 9A and 9B via the second pin members 21A and 21B. However, there is no problem, and the stroke amount can be shortened appropriately according to the application.

  The first electromagnet portions 6A and 6B and the second electromagnet portions 7A and 7B have substantially the same configuration. For this reason, it is only necessary to prepare two electromagnet portions having substantially the same configuration, and it is possible to reduce the complexity of management as compared with a case where electromagnet portions having different configurations are specially prepared.

FIG. 4 shows another embodiment of the present invention.
The first electromagnet part 6A, 6B and the second electromagnet part 7A, 7B are configured differently, and the attraction force K1 of the first electromagnet part is designed to obtain about half of the attraction force K of the second electromagnet part 7A, 7B. Accordingly, the power consumption W1 of the first electromagnet parts 6A and 6B is about half of the power consumption W of the second electromagnet parts 7A and 7B. The spring 4B is the same as that of the embodiment, and the spring force S is obtained in the switching state, and the spring force S1 is obtained in the holding state.
In the switching state, the second electromagnet portions 7A and 7B are energized and the first electromagnet portions 6A and 6B are de-energized. The large attractive force K of the second electromagnet portions 7A and 7B is larger than the force obtained by adding the fluid force F and the spring force S of the spring 4B, and switches and communicates between the plurality of flow paths P, A, B, R1, and R2.
In the holding state, the second electromagnet portions 7A and 7B are deenergized and the first electromagnet portions 6A and 6B are energized. The attractive force K1 of the first electromagnet parts 6A and 6B is about half of the switching state, and the holding state is continued with this small attractive force K1.

In the switching state, the second electromagnet portions 7A and 7B are energized to switch between the plurality of flow paths P, A, B, R1, and R2, and in the holding state, the first electromagnet portions 6A and 6B are energized. To maintain the switching state.
In such an operation, in substantially the same manner as in the embodiment, in the holding state, the energization is performed with the suction force K1 smaller than that in the switching state, so that an increase in the power consumption W1 can be suppressed. And in the switching state, since it is energized with a large suction force K, it can overcome the large fluid force F and increase the opening amount between the valve body 2 and the flow paths P, A, B, R1, R2, The flow rate can be increased.

  The first electromagnet portions 6A and 6B and the second electromagnet portions 7A and 7B energize the second electromagnet portions 7A and 7B having a large attraction force K in the switching state, and the attraction force K1 in the holding state is smaller than that in the switching state. The first electromagnet portions 6A and 6B were energized. For this reason, in the holding state, since the first electromagnet portions 6A and 6B having the attractive force K1 smaller than that in the switching state are energized, an increase in the power consumption W1 can be suppressed. In the switching state, since the second electromagnet portions 7A and 7B having a large attractive force K are energized, the large fluid force F is overcome and the valve body 2 and the flow paths P, A, B, R1, and R2 The amount of opening can be increased, and the flow rate can be increased.

  In addition, since the first electromagnet portions 6A and 6B are energized in the holding state in substantially the same manner as in the embodiment, the second electromagnet portions 7A and 7B are de-energized, and the second movable iron cores 20A and 20B are second pin members 21A, There is no problem even if the engagement with the first movable iron cores 9A and 9B via 21B is released, and the stroke amount can be appropriately shortened according to the application.

  In each of the above-described embodiments, the three-position electromagnetic switching valve is provided with the electromagnets 5A and 5B on both sides of the valve body 1, but the two-position electromagnetic switching valve is provided with the electromagnet 5A or 5B on either side. A switching valve may be used. Further, the first electromagnet portions 6A and 6B and the second electromagnet portions 7A and 7B have the connection pins 17A and 17B as a common negative common, but may be a common positive common. Alternatively, the negative common of the electromagnet 5A and the negative common of the electromagnet 5B may be shared to form one negative common. Further, the terminal box 34 for electrically connecting the electromagnets 5A and 5B to an external power source (not shown) is placed and fixed on the valve body 1. However, each electromagnet 5A and 5B is provided with a DIN terminal box or each electromagnet 5A and 5B. Of course, the lead wire may be electrically connected to an external power source.

1: Valve body 2: Valve body 5A, 5B: Electromagnet 6A, 6B: First electromagnet portion 7A, 7B: Second electromagnet portion 8A, 8B: First fixed iron core 9A, 9B: First movable iron core 10A, 10B: Tube 11A, 11B: first pin members 19A, 19B: second fixed iron cores 20A, 20B: second movable iron cores 21A, 21B: second pin members

Claims (5)

  A valve body is slidably inserted in the valve body in the axial direction, and an electromagnet that operates the valve body when energized is provided on the side of the valve body. In the electromagnetic switching valve that is in communication, the electromagnet is configured by connecting the second electromagnet portion in an axially outward direction of the first electromagnet portion adjacent to the valve body, and the first electromagnet portion is the first by the attractive force generated by energization. A first fixed iron core that sucks the movable iron core is fixed to the side surface of the valve body, and the first movable iron core is fitted to the cylindrical member so as to be slidable in the axial direction so as to face the first fixed iron core. And the valve body are engaged through a first pin member penetrating the first fixed iron core, and the second electromagnet portion has a second fixed iron core that attracts the second movable iron core with a suction force generated by energization. 1 Fixed to the cylindrical member outside the movable core in the axial direction, and the second movable core is slidable in the axial direction facing the second fixed core. The first electromagnet part and the second electromagnet part are large, and are engaged with each other via a second pin member penetrating the second fixed iron core between the second movable iron core and the first movable iron core. An electromagnetic switching valve characterized by having a switching state in which a plurality of flow paths are switched and communicated by a valve body with a suction force, and a holding state in which the switching state is maintained with a suction force smaller than the switching state.   2. The first electromagnet unit and the second electromagnet unit energize both electromagnet units in the switching state and energize any one electromagnet unit in the holding state. Electromagnetic switching valve.   The first electromagnet part and the second electromagnet part energize one of the electromagnet parts having a large attraction force in the switching state, and one electromagnet part energized in the switching state in the holding state. 2. The electromagnetic switching valve according to claim 1, wherein the other electromagnet portion having an attractive force smaller than that in the switching state is energized as non-energized.   The first electromagnet part and the second electromagnet part substantially represent a stroke amount for attracting the first movable iron core to the first fixed iron core and a stroke amount for attracting the second movable iron core to the second fixed iron core. The electromagnetic switching valve according to any one of claims 1 to 3, wherein the electromagnetic switching valve is the same. 5. The electromagnetic switching valve according to claim 1, wherein the first electromagnet portion is energized in the holding state.

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