JP2022116813A - Solenoid device - Google Patents

Abstract

To prevent a pin from falling off and to improve the workability of attaching the pin to a to-be-attached body by providing an enlarged diameter part on the pin.SOLUTION: A solenoid device 1 includes: a cylindrical bobbin 2 having a through-hole 21 penetrating along an axial direction O; a plunger 3 arranged in the through-hole 21 and supported to be movable in the axial direction O; a coil 4 wound around an outer circumference part 22 of the bobbin 2 and generating a magnetic force with energization to move the plunger 3 along the axial direction O; a cylindrical core 6 inserted in one side of the axial direction O of the bobbin 2 and having a through-hole 60 penetrating along the axial direction O; and a pin 7 inserted into the through-hole 60 of the core 6 and movable along the axial direction O together with the plunger 3. The pin 7 has a pin body 71, and a diameter-expanded part 72 provided on the end portion on the other side of the pin body 71 in the axial direction O, expanded in diameter than the inner diameter of the through-hole 60, and in contact with an opening end part on the other side of the through-hole 60 in the axial direction O.SELECTED DRAWING: Figure 2

Description

The present invention relates to solenoid devices.

A linear solenoid (solenoid device) is used to move a spool valve provided on a valve body (see, for example, Patent Document 1).
This linear solenoid consists of a plunger shaft (pin) that moves in contact with the spool valve, a core stator that movably supports the plunger shaft, an electromagnetic coil that generates magnetic flux when energized, and a magnetic material that covers them. with a case.

JP 2007-120713 A

However, in conventional linear solenoids, the plunger shaft is a cylinder with no enlarged diameter portion. For this reason, the plunger shaft tends to fall off from the linear solenoid when the linear solenoid is stored, mounted on the valve body, or the like.
SUMMARY OF THE INVENTION It is an object of the present invention to provide a solenoid device that prevents pins from coming off.

One aspect of the solenoid device of the present invention includes a cylindrical bobbin having a through hole passing through along the axial direction, a plunger arranged in the through hole and supported so as to be movable along the axial direction, A coil that is wound around the outer periphery of the bobbin and that generates a magnetic force when energized to move the plunger along the axial direction; A cylindrical core having a through hole, and a pin inserted into the second through hole of the core and movable along the axial direction together with the plunger, the pin comprising a pin body and an axis of the pin body. and an enlarged diameter portion that is provided at the end on the other side in the direction, has a larger diameter than the inner diameter of the second through hole, and contacts the edge of the opening of the second through hole on the other side in the axial direction. do.

According to one aspect of the solenoid device of the present invention, by providing the pin with the enlarged diameter portion, it is possible to prevent the pin from coming off and improve the workability of attaching it to the mounting body.

FIG. 1 is a perspective view showing an embodiment of a solenoid device of the present invention, and a view showing a state in which it is mounted on a valve body. 2 is a cross-sectional view of the solenoid device shown in FIG. 1. FIG.

An embodiment of the solenoid device of the present invention will be described with reference to FIGS. 1 and 2. FIG.
In the following, for convenience of explanation, the three axes orthogonal to each other are set as the X-axis, the Y-axis and the Z-axis. As an example, the XY plane including the X axis and the Y axis is horizontal, and the Z axis is vertical.
Further, the X-axis direction is sometimes referred to as the "axis O direction", the radial direction about the axis O is simply referred to as the "radial direction", and the circumferential direction about the axis O is simply referred to as the "circumferential direction". .

The positive side in the X-axis direction corresponds to "one side in the direction of the axis O", and the negative side in the X-axis direction corresponds to "the other side in the direction of the axis O".
In this specification, the vertical direction, horizontal direction, upper side, and lower side are terms simply used to describe the relative positional relationship of each part. Therefore, the actual positional relationship and the like of each part may differ from the positional relationship and the like indicated by these terms.

As shown in FIGS. 1 and 2, the solenoid device 1 is used by being mounted on a mounting body such as a valve body 10, for example.
The valve body 10 has a spool hole 30 opening to the mounting surface 101 , a spool valve 100 inserted into the spool hole 30 , and a plurality of oil passages (not shown) connected to the spool hole 30 within the valve body 10 . is doing.

By operating the solenoid device 1 attached to the valve body 10, the spool valve 100 can be moved along the X-axis direction to change the connection state of the plurality of oil passages.
The spool valve 100 is biased toward the negative side in the X-axis direction by a coil spring (biasing member) disposed inside the spool hole 30 (not shown).
Further, the mounting surface 101 of the valve body 10 is formed with a recess 20 connected to the spool hole 30 and recessed toward the positive side in the X-axis direction. The end portion of the solenoid device 1 on the positive side in the X-axis direction is inserted into the concave portion 20 .

As shown in FIG. 2 , the solenoid device 1 has a bobbin 2 , a plunger 3 , a coil 4 , a yoke 5 , a core 6 , a pin 7 and a case 9 .
The bobbin 2 is a tubular member having a through hole 21 . The through hole 21 penetrates the bobbin 2 along the X-axis direction. Moreover, the inner diameter of the through-hole 21 is constant along the X-axis direction.
The bobbin 2 is made of, for example, various resin materials such as polyester and polyimide.

A coil 4 formed by winding a conductive wire is arranged on the outer peripheral portion 22 of the bobbin 2 .
As the coil 4 is energized, a magnetic circuit is formed by the bobbin 2, the yoke 5, and the core 6, and magnetic force is generated. Thereby, the plunger 3 can be moved along the X-axis direction.

A yoke 5 and a core 6 are inserted into the through hole 21 of the bobbin 2 . Furthermore, the plunger 3 is inserted inside the yoke 5 and the pin 7 is inserted inside the core 6 . In other words, the yoke 5 is arranged between the bobbin 2 and the plunger 3 and the core 6 is arranged between the bobbin 2 and the pin 7 .
The yoke 5 is arranged on the negative side in the X-axis direction with respect to the bobbin 2, and the core 6 is arranged on the positive side in the X-axis direction.

The yoke 5 is a cylindrical member having a through hole 50 extending along the X-axis direction, and is arranged along the X-axis direction. The core 6 is also a cylindrical member having a through-hole (second through-hole) 60 penetrating along the X-axis direction, and is arranged along the X-axis direction.
The yoke 5 and core 6 are made of, for example, a soft magnetic material (soft magnetic metal material) such as iron. As a result, a magnetic circuit can be generated to the extent that the plunger 3 can be sufficiently moved.

The end of the yoke 5 on the positive side in the X-axis direction has a tapered shape in which the thickness decreases toward the positive side in the X-axis direction. Further, the end portion of the core 6 on the negative side in the X-axis direction has a tapered shape in which the thickness decreases toward the negative side in the X-axis direction.
With such a configuration, it becomes easier to preferentially act on the plunger 3 by the magnetic force generated by the formed magnetic circuit.

The plunger 3 is arranged inside the yoke 5 (inserted into the through hole 50), and is supported so as to be alternately movable (that is, reciprocatingly movable) to the positive side and the negative side along the X-axis direction. Further, when the plunger 3 moves to the X-axis direction positive side, the end portion on the X-axis direction positive side is positioned in the concave portion 68 formed on the core 6 on the X-axis direction negative side. The inner diameter of this recess 68 is the same as or slightly larger than the inner diameter of the through hole 50 .
The plunger 3 has a columnar shape, and a through hole 31 is formed along the X-axis direction. Gas in the solenoid device 1 moves through the through hole 31 . As a result, the plunger 3 can be smoothly moved along the X-axis direction.

The pin 7 arranged inside the core 6 (inserted into the through-hole 60 ) has a columnar shape and is movable toward the positive side in the X-axis direction by being pressed by the plunger 3 . The pin 7 presses the spool valve 100 to move the spool valve 100 toward the positive side in the X-axis direction.
On the other hand, when the coil 4 is de-energized, the spool valve 100 moves toward the negative side in the X-axis direction due to the biasing force of the coil spring inside the spool hole 30 . Then, the spool valve 100 presses the pin 7 and the plunger 3 to move them to the negative side in the X-axis direction.

The pin 7 is made of, for example, a lightweight metal material such as aluminum.
The pin 7 of the present embodiment includes a pin body 71 and an enlarged diameter portion 72 provided at the end of the pin body 71 on the negative side in the X-axis direction and having a larger diameter than the inner diameter of the through hole 60 (core 6). have. When the pin 7 moves most to the positive side in the X-axis direction, the expanded diameter portion 72 contacts the opening edge of the through-hole 60 on the negative side in the X-axis direction. With such a configuration, it is possible to prevent the pin 7 from easily falling out of the core 6 (solenoid device 1) when the solenoid device 1 is stored, mounted on the valve body 10, or the like.

Further, the core 6 has a recess 69 recessed toward the positive side in the X-axis direction on the bottom surface of the recess 68 . This recess 69 can accommodate the enlarged diameter portion 72 of the pin 7 . By providing the concave portion 69 and the concave portion 68, the length of the solenoid device 1 in the X-axis direction can be shortened.
The expanded diameter portion 72 is configured such that a portion of the enlarged diameter portion 72 protrudes from the recess 69 toward the negative side in the X-axis direction while being housed in the recess 69 . As a result, the plunger 3 can reliably press the pin 7 toward the positive side in the X-axis direction.

A surface 721 on the X-axis direction negative side of the enlarged diameter portion 72 is spherical. In this case, the influence of the inclination of the pin 7 is reduced, and the pressing force of the plunger 3 can be easily transmitted to the pin 7 in the X-axis direction.
In this embodiment, the surface 711 on the positive side in the X-axis direction of the pin body 71 is also spherical. This facilitates transmission of the pressing force of the pin 7 in the X-axis direction of the spool valve 100 .

The pin 7 further has a reduced diameter portion 73 having a smaller diameter than the outer diameter of the pin body 71 at the boundary between the pin body 71 and the enlarged diameter portion 72 . By providing the diameter-reduced portion 73, it is easy to prevent interference with the core 6 (in particular, the opening edge of the through-hole 60 on the negative side in the X-axis direction) at the boundary between the pin body 71 and the diameter-enlarged portion 72. .

The core 6 has a first region 61 on the positive side in the X-axis direction, a second region 62 protruding to the positive side in the X-axis direction from the first region 61 radially inward of the first region 61, and a second region 62 on the positive side in the X-axis direction. A third region 63 protrudes to the positive side in the X-axis direction from the second region 62 on the radially inner side of 62 . That is, the end of the core 6 on the positive side in the X-axis direction has a stepped shape.

In a state in which the solenoid device 1 is attached to the valve body 10 (hereinafter also simply referred to as "attached state"), the third region 63 is inserted into the recess 20, and the surface 631 on the positive side in the X-axis direction is inserted into the recess 20. contact the bottom surface of the In this mounted state, the surface 621 of the second region 62 on the positive side in the X-axis direction contacts the mounting surface 101 of the valve body 10 . As a result, the solenoid device 1 can be accurately positioned with respect to the valve body 10 in the X-axis direction.

The surface 621 on the positive side in the X-axis direction of the second region 62 is located on the positive side in the X-axis direction relative to the surface 611 on the positive side in the X-axis direction of the first region 61 . Therefore, a gap CL is formed between the surface 611 of the first region 61 and the mounting surface 101 of the valve body 10 when the solenoid device 1 is mounted on the valve body 10 .

Further, the third region 63 has a protrusion 632 that protrudes radially outward. This protrusion 632 is inserted in the groove-shaped recess 202 connected to the circular recess 201 in which the radial center portion of the third region 63 is located in the attached state.
As a result, even if the solenoid device 1 attempts to rotate about the axis O with respect to the valve body 10, the side surfaces 632a and 632b of the projection 632 abut against the side surfaces 202a and 202b of the groove-shaped recess 202, so that the rotation is prevented. be blocked. As a result, it is possible to accurately position the solenoid device 1 with respect to the valve body 10 in the circumferential direction.

Case 9 houses bobbin 2 , plunger 3 , coil 4 , yoke 5 , core 6 and pin 7 . The case 9 has a case body 91 and a connector member 92 .
The case main body 91 is a bottomed cylindrical member including a cylindrical body portion 911 extending along the X-axis direction and a wall portion 912 closing the negative side of the body portion 911 in the X-axis direction. Therefore, the case body 91 is open on the positive side in the X-axis direction.

Then, the outer peripheral edge of the first region 61 of the core 6 is covered with a crimping margin 911a deformed by crimping (hereinafter referred to as "crimping") the opening edge of the case 9 (body portion 911). ing. As a result, the bobbin 2, plunger 3, coil 4, yoke 5, core 6 and pin 7 are accommodated in the case 9, and the solenoid device 1 is assembled.
In the present embodiment, the crimping margin 911a is positioned between the surface 611 of the first region 61 and the surface 621 of the second region 62 .

Therefore, in the mounted state, the crimping margin 911a is located in the clearance CL. Therefore, it is possible to reliably prevent the crimping margin 911 a from interfering with the valve body 10 .
Like the core 6, the case body 91 is made of, for example, a soft magnetic metal material such as iron.
A connector (not shown) for energizing the coil 4 is connected to the connector member 92 . The connector member 92, like the bobbin 2, is made of, for example, a resin material.

An end portion 921 of the connector member 92 protrudes toward the positive side in the X-axis direction. This end portion 921 is inserted into the rectangular recess 203 connected to the groove-shaped recess 202 in the mounted state. As a result, even if the solenoid device 1 attempts to rotate about the axis O with respect to the valve body 10, the side surfaces 921a and 921b of the end portion 921 abut against the side surfaces 203a and 203b of the rectangular recessed portion 203, so that the above rotation can be suppressed. definitely blocked. Therefore, the positioning of the solenoid device 1 with respect to the valve body 10 in the circumferential direction can be performed more accurately.

Although the illustrated embodiment of the solenoid device of the present invention has been described above, the present invention is not limited to this, and each part constituting the solenoid device may have any configuration capable of exhibiting similar functions. can be replaced with Moreover, arbitrary components may be added.
In addition, the mounting body to which the solenoid device is attached is not limited to the valve body, but may be a channel member having a channel through which the liquid or gas passes by the valve body and a valve body that opens and closes the channel by the operation of the solenoid device. It can be. In this case, an electromagnetic valve can be configured by attaching a solenoid device to the channel member.

DESCRIPTION OF SYMBOLS 1... Solenoid apparatus, 2... Bobbin, 21... Through hole, 22... Peripheral part, 3... Plunger, 31... Through hole, 4... Coil, 5... Yoke, 50... Through hole, 6... Core, 60... Through hole, 61...
1st region 611 surface 62 second region 621 surface 63 third region 631 surface 632 protrusion 632a, 632b side surface 68 recess 69 recess 7 pin , 71... Pin body, 711... Surface, 72... Expanded diameter portion, 721... Surface, 73... Reduced diameter portion, 9... Case, 91... Case body, 911... Body portion, 911a... Crimp margin, 912... Wall portion, DESCRIPTION OF SYMBOLS 92... Connector member 921... End part 921a, 921b... Side surface 10... Valve body 101... Mounting surface 20... Recessed part 201... Circular recessed part 202... Grooved recessed part 202a, 202b... Side surface 203... Rectangle Recess 203a, 203b Side surface 30 Spool hole 100 Spool valve O Shaft CL Gap

Claims (6)

a cylindrical bobbin having a through hole extending along the axial direction;
a plunger disposed in the through hole and supported so as to be axially movable;
a coil that is wound around the outer periphery of the bobbin and that generates a magnetic force when energized to move the plunger along the axial direction;
a tubular core having a second through-hole inserted in one axial direction side of the bobbin and penetrating along the axial direction;
a pin inserted into the second through hole of the core and movable along the axial direction together with the plunger;
The pin is provided on a pin body and an end portion on the other side in the axial direction of the pin body, has a larger diameter than the inner diameter of the second through hole, and is an opening edge portion on the other side in the axial direction of the second through hole. A solenoid device, comprising: an enlarged diameter portion for contacting a. 2. The solenoid device according to claim 1, wherein the core has a recess on the other axial side thereof which is recessed on the one axial side and can accommodate the enlarged diameter portion of the pin. 3. The solenoid device according to claim 1, wherein the surface on the other side in the axial direction of the enlarged diameter portion is spherical. The solenoid device according to any one of claims 1 to 3, wherein the pin further has a diameter-reduced portion having a diameter smaller than that of the pin body at a boundary portion between the pin body and the diameter-enlarged portion. The solenoid device according to any one of claims 1 to 4, wherein a portion of the enlarged diameter portion protrudes from the recess toward the other side in the axial direction while being accommodated in the recess. The solenoid device according to any one of claims 1 to 5, wherein a surface on one side in the axial direction of the pin body is spherical.

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