CN111692147B - Electromagnetic proportional valve, reversing valve and construction machine - Google Patents

Abstract

The invention provides a driving device, an electromagnetic proportional valve, a reversing valve and a construction machine. An electromagnetic proportional valve according to an embodiment of the present invention includes: a hollow housing extending in an axial direction; a driving member provided in the housing so as to be movable in the axial direction, for driving the spool; and a pin having a pin inclined surface inclined with respect to the axial direction. The pin is movable in a radial direction orthogonal to the axial direction from a1 st position where the pin is not in contact with the driving member to a 2 nd position radially inward of the 1 st position where the pin inclined surface is in contact with the driving member.

Description

Solenoid proportional valves, reversing valves and construction machinery

Technical Field

The present invention relates to an electromagnetic proportional valve, a reversing valve and a construction machine.

Background technique

An electromagnetic proportional valve is known that controls the supply and discharge of pilot oil to a hydraulic device as a control target by adjusting the excitation current applied to a solenoid driver to move the position of a spool. The electromagnetic proportional valve is disclosed in Japanese Patent Application Publication No. 2017-020541 (Patent Document 1).

For electromagnetic proportional valves, if a fault occurs in the electrical system for controlling the solenoid driver, the spool may be difficult to move or cannot move. Therefore, sometimes a manual pin for manually changing the position of the spool is provided in the electromagnetic proportional valve. An electromagnetic proportional valve including such a manual pin is disclosed in Japanese Patent Publication No. 2000-274547 (Patent Document 2).

Prior art literature

Patent Literature

Patent Document 1: Japanese Patent Application Publication No. 2017-020541

Patent Document 2: Japanese Patent Application Publication No. 2000-274547

Summary of the invention

Problem that the invention aims to solve

As shown in Patent Document 2, a power cable for supplying power to a solenoid coil is sometimes arranged on the side of a housing that houses the solenoid coil. An electromagnetic proportional valve is sometimes used as a pilot valve for supplying a control pressure to a directional control valve. In a construction machine, a plurality of directional control valves are arranged in parallel with each other's axes. Therefore, if a power cable is led out from the side of the housing to the outside, it is difficult to compactly arrange the directional control valve that works under the control pressure of the electromagnetic proportional valve.

Therefore, it is considered that the power cable is led out from the end face of the housing in the axial direction instead of the side face of the housing. However, if the power cable is led out from the axial end face of the housing, the position where the power cable is led out interferes with the configuration position of the manual pin. Thus, the conventional electromagnetic proportional valve including the manual pin for manually adjusting the position of the spool has the problem that it is difficult to lead out the power cable from the end face of the housing.

The purpose of the present disclosure is to provide a novel electromagnetic proportional valve that can alleviate or solve at least a part of the above-mentioned conventional problems. One of the more specific purposes of the present disclosure is to lead out a power cable from an axial end in an electromagnetic proportional valve including a manual pin for manually driving a spool. The purposes of the present disclosure other than the above-mentioned can be known from the overall description of this specification.

Solutions for solving problems

A driving device of one technical solution of the present invention includes: a solenoid coil, which is arranged in a hollow portion of a housing; a driving member, which is arranged in the hollow portion and drives a sliding valve core that can move axially by applying an excitation current to the solenoid coil; and a pin, which has a pin inclined surface inclined relative to the axial direction and can move from a first position to a second position in a radial direction orthogonal to the axial direction, wherein in the first position, the pin does not contact the driving member, and the second position is closer to the radial inner side than the first position, and in the second position, the pin inclined surface contacts the driving member.

An electromagnetic proportional valve according to a technical solution of the present invention includes: a valve unit having a sliding valve core that can move in an axial direction, and a control pressure supplied to a controlled object is controlled by the movement of the sliding valve core; a housing having a hollow portion; a solenoid coil that is disposed in the hollow portion; a driving member that is disposed in the hollow portion and moves in the axial direction by applying an excitation current to the solenoid coil, thereby driving the sliding valve core; and a pin having a pin inclined surface that is inclined relative to the axial direction and can move from a first position to a second position in a radial direction orthogonal to the axial direction, wherein in the first position, the pin does not contact the driving member, and the second position is closer to the inner side of the radial direction than the first position, and in the second position, the pin inclined surface contacts the driving member.

In one aspect of the present invention, the driving member has a driving member inclined surface having a shape complementary to the pin inclined surface, and when the pin is located at the second position, the pin inclined surface contacts the driving member inclined surface.

An electromagnetic proportional valve according to a technical solution of the present invention includes: a valve unit, which has a sliding valve core that can move in an axial direction, and a control pressure supplied to a controlled object is controlled by the movement of the sliding valve core; a housing, which has a hollow portion; a solenoid coil, which is arranged in the hollow portion; a driving member, which is arranged in the hollow portion, and moves in the axial direction by applying an excitation current to the solenoid coil, thereby driving the sliding valve core; and a pin, which can move from a first position to a second position in a radial direction orthogonal to the axial direction, in which the pin does not contact the driving member in the first position, and in which the pin is closer to the radial inside than the first position, and in which the pin contacts the driving member in the second position, and in which the pin applies a thrust in the axial direction to the driving member in the second position.

In a technical solution of the present invention, the electromagnetic proportional valve includes a connector that closes the opening of the housing, and the pin is provided between the connector and the housing.

In one aspect of the present invention, the connector has a flat surface extending parallel to the axial direction, and the pin is provided on the flat surface.

In one aspect of the present invention, the connector houses a portion of a cable for applying an excitation current to the solenoid coil.

The pin has a protrusion that protrudes from the connector toward the radially outer side.

An electromagnetic proportional valve according to one technical solution of the present invention includes: a valve unit having a spool that can move in an axial direction, and a control pressure supplied to a controlled object is controlled by the movement of the spool; a housing having a hollow portion; a solenoid coil disposed in the hollow portion; a drive member disposed in the hollow portion, and moving in the axial direction by applying an excitation current to the solenoid coil, thereby driving the spool; a connector that closes an opening of the housing; a pin disposed between the connector and the housing, having a pin inclined surface inclined with respect to the axial direction, the pin being movable from a first position to a second position in a radial direction orthogonal to the axial direction, wherein the pin does not contact the drive member in the first position, the second position is closer to the radial inner side than the first position, and the pin inclined surface contacts the drive member in the second position; and a cable, at least a portion of which is accommodated in the connector and is used to apply an excitation current to the solenoid coil.

A reversing valve according to a technical solution of the present invention includes any of the above-mentioned electromagnetic proportional valves.

A construction machine according to a technical solution of the present invention includes the above-mentioned reversing valve.

Effects of the Invention

According to the present disclosure, in an electromagnetic proportional valve including a manual pin for manually driving a spool, a power cable can be led out from an end portion in an axial direction.

BRIEF DESCRIPTION OF THE DRAWINGS

Fig. 1 is a cross-sectional view schematically showing a cross section of a part of an electromagnetic proportional valve 1 according to an embodiment of the present invention, taken along the axial direction. In Fig. 1 , a pin 19 is located at a first position where the pin 19 does not contact the plunger 16 .

Fig. 2 is a cross-sectional view schematically showing a cross section of a part of the electromagnetic proportional valve 1 according to one embodiment of the present invention, taken along the axial direction. In Fig. 2 , the pin 19 is located at a second position where it contacts the plunger 16 .

FIG. 3 is a diagram schematically showing an end surface of the electromagnetic proportional valve 1 of FIG. 1 .

FIG. 4 is a diagram schematically showing a drive member and a pin included in an electromagnetic proportional valve according to another embodiment of the present invention.

FIG. 5 is a block diagram illustrating a directional control valve including the electromagnetic proportional valve of FIG. 1 .

FIG. 6 is a block diagram illustrating a construction machine including the reversing valve of FIG. 5 .

Description of Reference Numerals

1. Solenoid proportional valve; 10. Drive device; 12. Connector; 13. Cable; 14. Solenoid coil; 16. 116. Plunger; 17. Drive rod; 19. 119. Pin; 19a. Protrusion; 19b. 119b. Pin inclined surface; 20. Valve unit; 22. Sliding valve core; 116a. Drive member inclined surface.

Detailed ways

Various embodiments of the present invention are described below with appropriate reference to the accompanying drawings. For components that are common to multiple drawings, the same reference numerals are marked in the multiple drawings. It should be noted that for the sake of convenience, the drawings are not necessarily illustrated in an accurate scale. In each of the drawings, for the sake of convenience, some components are omitted.

An electromagnetic proportional valve 1 according to an embodiment of the present invention is described with reference to FIGS. 1 to 3 . The electromagnetic proportional valve 1 includes a drive device 10 and a valve unit 20 . The drive device 10 and the valve unit 20 are arranged along a central axis A. In this specification, the direction along the central axis A is sometimes referred to as “axial direction”. When referring to front and back in this specification, the front and back directions shown in FIG. 1 are used as a reference unless otherwise specified in the text. Therefore, the valve unit 20 is arranged in front of the drive device 10.

The electromagnetic proportional valve 1 can be maintained in any of three states: a supply position, a discharge position and a neutral position. In the supply position, the hydraulic device is connected to the hydraulic source, and oil is supplied to the hydraulic device from the hydraulic source. In the discharge position, the hydraulic device is connected to a tank for storing oil, and oil is discharged from the hydraulic device to the tank. In the neutral position, the hydraulic device and the hydraulic source as well as the hydraulic device and the tank are blocked.

The valve unit 20 includes a hollow valve body 21 extending in the axial direction along the central axis A and a spool 22 provided inside the valve body 21. The valve body 21 has a pressure source port for communicating with a pressure source, a tank port for communicating with a tank, and a control port for outputting a control pressure to a hydraulic device as a control object. Illustration of the ports is omitted.

The drive device 10 applies an axial thrust to the slide valve core 22, thereby controlling the axial position of the slide valve core 22. The drive device 10 includes a hollow housing 11, a connector 12, a solenoid coil 14 disposed in the hollow portion of the housing 11, a plunger 16 driven by the solenoid coil 14, a cylindrical member 15 guiding the plunger 16, a drive rod 17 extending forward from the front end of the plunger 16, and a fixed iron core 18. The plunger 16 and the drive rod 17 are also disposed in the hollow portion of the housing 11.

The housing 11 has a bottomed cylindrical shape extending in the direction of the central axis A. The front of the housing 11 is open toward the valve unit 20. The front opening of the housing 11 is sealed by the fixed iron core 18 and other sealing members. The bottom wall 11b of the housing 11 has a through hole extending in the axial direction. The through hole is blocked by the connector 12.

The cylindrical member 15 has a bottomed cylindrical shape extending in the axial direction. The inner diameter of the cylindrical member 15 is substantially equal to the outer diameter of the large diameter portion 16a of the plunger 16. The cylindrical member 15 has a through hole 15a on the side surface thereof into which the pin 19 is inserted.

As shown in FIG3 , the connector 12 has an upper wall 12a having a substantially rectangular shape when viewed from the direction of the central axis A, a bottom wall 12b arranged axially away from the upper wall 12a, and four side walls 12c connecting the upper wall 12a and the bottom wall 12b. The internal space of the connector 12 is divided by these upper walls 12a, bottom walls 12b, and side walls 12c. The upper wall 12a has a through hole. The side wall 12c is substantially flat. The side wall 12c has a flat flat surface. A portion of the cable 13 is accommodated in the internal space of the connector 12. Although not shown, the cable 13 is electrically connected to the solenoid coil 14. The solenoid coil 14 is excited based on a control signal inputted from a controller not shown via the cable 13. The connector 12 has a through hole extending axially, and the cable 13 is led out to the outside from the through hole.

The plunger 16 and the drive rod 17 are both arranged on the central axis A. Alternatively, the plunger 16 and the drive rod 17 may have an integral structure. The plunger 16 and the drive rod 17 are arranged in a manner that allows them to move in the axial direction. The drive rod 17 extends axially forward from the plunger 16. The top end (front end) of the drive rod 17 contacts the base end (rear end) of the slide valve core 22. The slide valve core 22 is always urged axially backward by a return spring (not shown), so that the contact between the drive rod 17 and the slide valve core 22 can be maintained.

At least a portion of the plunger 16 is formed of a magnetic body. At least a portion of the plunger 16 is disposed radially inward of the solenoid coil 14. The plunger 16 is driven by the solenoid coil 14. That is, the plunger 16 is driven by the solenoid coil 14 so as to be able to move in the axial direction. Specifically, an excitation current is applied to the solenoid coil 14, so that the plunger 16 is adsorbed by the fixed iron core 18. As a result, the plunger 16 and the drive rod 17 move forward in the axial direction, and a thrust force toward the axial front is applied to the slide valve core 22. In this way, the slide valve core 22 is driven by the plunger 16 and the drive rod 17. In this specification, a component that drives the slide valve core 22 by electrical control is referred to as a driving component. The slide valve core 22 is driven by the axial movement of the plunger 16 and the drive rod 17, so the plunger 16 and the drive rod 17 are examples of a driving component. The driving component may also include components other than the plunger 16 and the drive rod 17. The latter pin 19 is manually movable, is not electrically driven and is therefore not included in the drive means.

The spool 22 driven by the plunger 16 and the drive rod 17 moves axially forward. If the supply of excitation current to the solenoid coil 14 is interrupted, the spool 22 moves axially backward together with the plunger 16 and the drive rod 17 due to the force from the force applying member. In this way, by applying the excitation current to the solenoid coil 14, the axial position of the spool 22 can be changed, thereby switching the electromagnetic proportional valve 1 to any one of the supply position, the discharge position and the neutral position.

A groove 11c is provided on a portion of the outer surface of the bottom wall 11b of the housing 11. The groove 11c extends radially on the outer surface of the bottom wall 11b. A through hole 12c1 for inserting a pin is provided on one of the four side walls 12c of the connector 12. A pin 19 is provided in the groove 11c. A portion of the pin 19 extends from the outer space of the housing 11 to the inner space of the housing 11 through the through hole 12c1. In this way, the pin 19 is provided between the housing 11 and the connector 12. The pin 19 has a convex portion 19a that protrudes radially outward from the outer surface of the side wall 12c when viewed from the center axis A.

The pin 19 can move radially along the groove 11c. FIG. 1 shows the pin 19 at the first radial position, and FIG. 2 shows the pin 19 at the second radial position. The second position of the pin 19 is a position radially inner than the first position. As shown in FIG. 1, the pin 19 does not contact the plunger 16 at the first position. When the pin 19 is at the first position, it is arranged at a position that does not interfere with the stroke range of the plunger 16. As shown in FIG. 2, the pin 19 contacts the plunger 16 when it is at the second position radially inner than the first position. The pin 19 has a pin inclined surface 19b inclined relative to the center axis A. The pin inclined surface 19b is a radially inner surface of the pin 19. The pin inclined surface 19b connects a first radial surface 19c and a second radial surface 19d in the surface of the pin 19 that are parallel to the radial direction and perpendicular to the axial direction. The first radial surface 19c is axially rearward of the second radial surface 19d. The pin inclined surface 19a is inclined in a direction in which the radial length of the first radial surface 19c is longer than the radial length of the second radial surface 19d. The position of the pin 19 shown in FIG. 2 is an example of the second position. The second position is a position where the pin 19 contacts the plunger 16. If the pin 19 is pushed radially inward from the first position, the pin inclined surface 19a first contacts the plunger 16 at the radial start contact position. The second position refers to a position radially inward of the start contact position.

When the pin 19 contacts the tip (rear end) of the plunger 16 at the pin inclined surface 19a, the pin 19 is further pushed radially inward, so that the axial thrust can be applied to the plunger 16 from the pin 19. Therefore, even if there is a malfunction in the electrical system and the plunger 16 cannot be driven by the solenoid coil 14, the pin 19 can be pushed radially inward by, for example, an operator's operation, so that the plunger 16 and the drive rod 17 can be moved in the axial direction, and as a result, the position of the spool 22 can be switched.

Referring to FIG. 4 , a driving member and a pin in contact with the driving member of another embodiment are described. FIG. 4 is a diagram schematically showing a driving member and a pin included in an electromagnetic proportional valve of another embodiment of the present invention. The driving member shown in FIG. 4 has a plunger 116 and a driving rod 117 extending forward from the front end of the plunger 116. The plunger 116 has a driving member inclined surface 116a at its rear end that is complementary to the pin inclined surface of the pin 119. In the illustrated embodiment, the driving member inclined surface 116a and the pin inclined surface 119a are inclined at the same angle relative to the central axis A. The pin 119 pushed radially inward to the second position contacts the driving member inclined surface 116a of the plunger 116 at its pin inclined surface 119a. When the pin inclined surface 119a of the pin 119 contacts the driving member inclined surface 116a of the plunger 116, the pin 119 is further pushed radially inward, so that an axial thrust can be applied from the pin 119 to the plunger 116.

Next, the operation of the electromagnetic proportional valve 1 is described. When the electromagnetic coil 14 is not energized, the slide valve core 22 is maintained in the discharge position. From this state, when the solenoid coil 14 is energized, the plunger 16 is driven, and the plunger 16 moves axially forward together with the drive rod 17. At this time, the front end of the drive rod 17 contacts the slide valve core 22, so the thrust axially forward acts on the slide valve core 22. Under the action of this thrust, the slide valve core 22 reaches the neutral position from the discharge position. If a larger excitation current is applied to the solenoid coil 14, the plunger 16 and the drive rod 17 move further axially forward. The slide valve core 22 reaches the supply position under the action of the thrust received from the drive rod 17, and supplies control pressure to the hydraulic equipment that is the control object.

When the plunger 16 cannot be driven by applying an excitation current to the solenoid coil 14 due to a malfunction of the electrical system or other reasons, the plunger 16 can be moved axially by the operator by pushing the pin 19 or the pin 119 radially inward, thereby switching the position of the sliding valve core 22.

Next, an application example of the electromagnetic proportional valve 1 is described with reference to FIG. 5 and FIG. 6. FIG. 5 is a block diagram for describing a directional control valve 100 including the electromagnetic proportional valve 1. As shown in the figure, the directional control valve 100 includes the electromagnetic proportional valve 1 and a valve structure 2 that operates under the control pressure supplied from the electromagnetic proportional valve 1. The valve structure 2 includes a main spool, and the position of the main spool is switched under the control pressure output from the electromagnetic proportional valve 1, thereby adjusting the supply amount of working oil to a hydraulic cylinder (not shown).

FIG6 is a block diagram illustrating a construction machine 200 including a reversing valve 100. The construction machine 200 includes the reversing valve 100. The construction machine is, for example, a hydraulic excavator that works using hydraulic pressure. The construction machine 200 includes various hydraulic cylinders. The hydraulic cylinders included in the construction machine 200 include a boom cylinder that drives a boom, an arm cylinder that drives an arm, a bucket cylinder that drives a bucket, and hydraulic cylinders other than these. The reversing valve 100 controls the amount of working oil supplied to the hydraulic cylinders included in the construction machine 200.

Next, the effects achieved by the above embodiment will be described. The electromagnetic proportional valve 1 of the above embodiment includes: a hollow housing 11 extending in the axial direction; a plunger 16 and a drive rod 17, which are arranged in the housing 11 in a manner that can move in the axial direction and are used to drive the slide valve core 22; and a pin 19, which has a pin inclined surface inclined relative to the axial direction. The pin 19 can move from the first position to the second position in the radial direction under the operation of the operator. In the first position, the pin 19 does not contact the plunger 16, and the second position is radially inward than the first position. In the second position, the pin inclined surface 19b contacts the plunger 16. Therefore, even if the plunger cannot be electrically controlled due to a malfunction of the electrical system, the position of the slide valve core 22 can be switched by operating the pin 19. The moving direction of the pin 19 is a radial direction perpendicular to the axial direction, so it is easy to avoid interference between the pin 19 and the cable 13 led out in the axial direction.

In the above embodiment, the plunger 116 has the driving member inclined surface 116a having a shape complementary to the pin inclined surface 119a. Thus, when the pin 119 and the plunger 116 come into contact, they are in surface contact, so damage to the pin 119 and the plunger 116 can be suppressed.

In the above-mentioned embodiment, the side wall 12c of the connector 12 has a flat surface extending parallel to the axial direction, and the pin 19 is provided on the flat surface. In many cases, the side surface of the housing 11 has a cylindrical shape, so it is often difficult to provide the pin 19 on the side surface of the housing 11. In the above-mentioned embodiment, the pin 19 is attached to the flat surface of the side wall 12c of the connector 12, so the installation of the pin 19 becomes easy.

The pin 19 has a convex portion 19a that protrudes radially outward from the connector 12. Thus, an operator can operate the pin 19 relatively easily.

The size, material, configuration and process of each component described in this specification are not limited to the contents clearly described in the embodiment, and each component can be deformed to have any size, material, configuration and process that can be included in the scope of the present invention. In addition, the component not clearly described in this specification can be added to the described embodiment, and part of the component described in each embodiment can be omitted.

The specific shapes, configurations, functions and materials of the components of the drive device 10 and the valve unit 30 clearly shown in this specification and the drawings are examples. The shapes, configurations, functions and materials of the components of the drive device 10 and the valve unit 30 can be appropriately changed within the scope that does not violate the main purpose of the present invention. For example, the movement of the pin 19 to the radial inside may not be a linear movement. For example, the pins 19, 119 can also move radially inward by revolving around the axis. The shape of the pins 19, 119 is not limited to the shape clearly shown in this specification. The pins 19, 119 can adopt any shape that can apply axial thrust to the plungers 16, 116 when the pins 19, 119 are pushed further radially inward from the position where the pins 19, 119 contact the plungers 16, 116.

The driving device 10 may drive the driving rod 17 so as to move axially rearward when the excitation current flows to the solenoid coil 23 .

Claims (10)

1. An electromagnetic proportional valve, comprising:

A valve unit having a spool movable in an axial direction, the valve unit controlling a control pressure supplied to a control target by movement of the spool;

a housing having a hollow portion;

a solenoid coil provided in the hollow portion;

a driving member provided in the hollow portion, the driving member being configured to drive the spool by applying an exciting current to the solenoid coil and thereby moving the solenoid coil in the axial direction; and

And a pin provided in a groove formed on an outer surface of a bottom wall of the housing so as to extend in a radial direction orthogonal to the axial direction, the pin having a pin inclined surface inclined with respect to the axial direction, the pin being movable in the radial direction from a1 st position, in which the pin is not in contact with the driving member, to a2 nd position, in which the pin inclined surface is located on an inner side in the radial direction than the 1 st position, and in which the pin inclined surface is in contact with the driving member.

2. The electromagnetic proportional valve of claim 1, wherein,

The driving member has a driving member inclined surface of a shape complementary to the pin inclined surface, and the pin inclined surface is in contact with the driving member inclined surface with the pin at the 2 nd position.

3. An electromagnetic proportional valve, comprising:

A valve unit having a spool movable in an axial direction, the valve unit controlling a control pressure supplied to a control target by movement of the spool;

a housing having a hollow portion;

a solenoid coil provided in the hollow portion;

a driving member provided in the hollow portion, the driving member being configured to drive the spool by applying an exciting current to the solenoid coil and thereby moving the solenoid coil in the axial direction; and

A pin provided in a groove formed on an outer surface of a bottom wall of the housing so as to extend in a radial direction orthogonal to the axial direction, the pin being movable in the radial direction from a 1st position, in which the pin is not in contact with the driving member, to a 2 nd position, in which the pin is in contact with the driving member, on an inner side of the 1st position in the radial direction, and in which the pin applies a thrust force in the axial direction to the driving member.

4. The electromagnetic proportional valve according to any one of claim 1 to 3, wherein,

The electromagnetic proportional valve comprises a connector that closes the opening of the bottom wall of the housing,

The pin is disposed between the connector and the housing.

5. The electromagnetic proportional valve of claim 4, wherein,

The connector has a flat face extending parallel to the axial direction,

The pin is provided on the flat surface.

6. The electromagnetic proportional valve of claim 4, wherein,

The connector receives a portion of a cable for applying an excitation current to the solenoid coil.

7. The electromagnetic proportional valve of claim 4, wherein,

The pin has a convex portion protruding outward in the radial direction from the connector.

8. A reversing valve comprising the electromagnetic proportional valve of any one of claims 1 to 7.

9. A construction machine comprising the directional valve of claim 8.

10. An electromagnetic proportional valve, comprising:

a valve unit having a spool movable in an axial direction, the valve unit controlling a control pressure supplied to a control target by movement of the spool;

a housing having a hollow portion;

a solenoid coil provided in the hollow portion;

A driving member provided in the hollow portion, the driving member being configured to drive the spool by applying an exciting current to the solenoid coil and thereby moving the solenoid coil in the axial direction;

a connector that closes an opening of a bottom wall of the housing;

A pin which is located in a groove formed in an outer surface of the bottom wall of the housing so as to extend in a radial direction orthogonal to the axial direction, is provided between the connector and the housing, and has a pin inclined surface inclined with respect to the axial direction, the pin being movable in the radial direction from a1 st position, in which the pin is not in contact with the driving member, to a2 nd position, in which the pin inclined surface is located on the inner side in the radial direction than the 1 st position, and in which the pin inclined surface is in contact with the driving member; and

And a cable, at least a part of which is accommodated in the connector, for applying exciting current to the solenoid coil.