CN217272239U - Solenoid device - Google Patents

Abstract

The utility model provides a solenoid device even remain magnetic force when fixed iron core is in the non-excitation state, also can make plunger and fixed iron core separate smoothly to can prevent that the piece part from droing from fixed iron core, thereby improve solenoid device's equipment operation nature. The solenoid device includes: a bobbin having a through hole penetrating in an axial direction; a plunger inserted into one side of the through hole in the axial direction and supported to be movable in the axial direction; a coil wound around an outer periphery of the bobbin and generating a magnetic force with energization to move the plunger in the axial direction; a fixed iron core inserted into the other side of the through hole in the axial direction; a biasing member disposed between the plunger and the fixed core, and biasing the plunger toward one side in the axial direction; and a non-magnetic sheet member disposed between the plunger and the fixed core so as to be in contact with the other axial side of the plunger, the sheet member having an annular shape with a through hole through which the rod-shaped body can pass.

Description

Solenoid device

Technical Field

The utility model relates to a solenoid device.

Background

An electromagnetic valve that opens and closes a flow path is known (for example, see patent document 1). The solenoid valve described in patent document 1 includes a solenoid portion (solenoid device) including: a fixed iron core excited by a magnetic field generated by energizing a coil; a plunger attracted by the excited fixed iron core; and a return spring that biases the plunger in a direction away from the fixed core.

In this solenoid valve, a plunger is reciprocated with excitation and non-excitation of a fixed core, and a valve element fixed to the plunger opens and closes a flow path.

Patent document 1: japanese laid-open patent publication No. 10-196827

However, in the conventional solenoid valve, when the plunger is attracted to the excited fixed core, they are configured to be in direct contact with each other. Therefore, even if the fixed core is in the non-excited state, depending on the degree of residual magnetic force, the plunger may not be smoothly separated from the fixed core by the return spring.

SUMMERY OF THE UTILITY MODEL

An object of the present invention is to provide a solenoid device, which can smoothly separate a plunger from a fixed core even if a magnetic force remains on the fixed core in a non-excited state, and can prevent a sheet member from coming off from the fixed core, thereby improving the assembling workability of the solenoid device.

A first aspect of the present invention provides a solenoid device, characterized in that the solenoid device has: a cylindrical bobbin having a through hole penetrating in an axial direction; a plunger inserted into one axial side of the through hole and supported to be movable in an axial direction; a coil wound around an outer peripheral portion of the bobbin, the coil generating a magnetic force in response to energization to move the plunger in an axial direction; a fixed core inserted into the other axial side of the through hole; a biasing member disposed between the plunger and the fixed core, and biasing the plunger to one axial side; and a non-magnetic sheet member that is disposed between the plunger and the fixed core so as to contact the other axial side of the plunger, and that has an annular shape having a second through hole through which the rod-shaped body can pass.

A second aspect of the present invention is the solenoid device of the first aspect, wherein the fixed core has a hole portion recessed toward the other axial side on a surface on one axial side thereof, and the rod-shaped body is a pin partially inserted into the hole portion or a jig partially inserted into the hole portion.

A third aspect of the present invention is the solenoid device of the second aspect, wherein the pin is press-fitted or screw-fastened into the hole.

A fourth aspect of the present invention is the solenoid device according to the first aspect, wherein the rod-shaped body is a pin that protrudes toward one axial side from a surface on one axial side of the fixed core and that forms one component with the fixed core.

A solenoid device according to a fifth aspect of the present invention is the solenoid device according to any one of the second to fourth aspects, wherein the pin has an enlarged diameter portion at an end portion on one side in the axial direction.

A solenoid device according to a sixth aspect of the present invention is the solenoid device according to the fifth aspect, wherein the length of the diameter-expanding portion protruding from the fixed core is larger than the thickness of the sheet member.

A seventh aspect of the present invention is the solenoid device of any one of the first to fourth aspects, wherein the sheet member is pressed toward the fixed core by making the other axial side of the force application member contact with the sheet member.

The present invention according to an eighth aspect is the solenoid device according to any one of the first to fourth aspects, wherein the plunger has a concave portion that is concave toward one axial side on a surface of the other axial side thereof, and the force application member has an axial side that contacts with a bottom surface of the concave portion of the plunger.

A ninth aspect of the present invention is the solenoid device of any one of the first to fourth aspects, wherein the fixed iron core has a concave portion that is concave toward the axial direction opposite side on a surface on one side of the axial direction thereof, and the sheet member is in contact with a bottom surface of the concave portion of the fixed iron core.

A solenoid device according to a tenth aspect of the present invention is the solenoid device according to the ninth aspect, wherein the recessed portion has a groove formed along a circumferential direction at a boundary portion between the bottom surface and the inner peripheral surface.

According to the present invention, since the non-magnetic sheet member is disposed between the plunger and the fixed core, even if the magnetic force remains on the fixed core in the non-excited state, the plunger and the fixed core can be smoothly separated from each other, and the sheet member can be prevented from falling off from the fixed core, thereby improving the assembling workability of the solenoid device.

Drawings

Fig. 1 is a sectional view showing a first embodiment of a solenoid valve.

Fig. 2 is an enlarged view of the vicinity of the sheet member shown in fig. 1.

Fig. 3a and 3b are enlarged sectional views of the vicinity of the sheet member in the second embodiment of the solenoid valve.

Fig. 4 is an enlarged sectional view of the vicinity of the sheet member in the third embodiment of the solenoid valve.

Fig. 5 is an enlarged sectional view of the vicinity of the sheet member in the fourth embodiment of the solenoid valve.

Description of the reference symbols

1: a solenoid device; 2: a bobbin; 21: a through hole; 22: a peripheral portion; 3: a plunger; 31: a recess; 32: a recess; 321: a bottom surface; 33: a protrusion; 34: an outer peripheral surface; 4: a coil; 5: fixing the iron core; 50: a gasket; 51: a recess; 511: a bottom surface; 512: an inner peripheral surface; 513: a groove; 52: a hole portion; 53. 54: a pin; 531. 541: an expanding portion; 59: a flange portion; 61. 62: a gasket; 7: a ring member; 8: a coil spring; 9: a housing; 91: a housing main body; 92: a connector component; o: an axis; s: a sheet member; s1: a through hole (second through hole); a: an adhesive; 10: a valve mechanism; 20: a nozzle; 201: a side hole; 202: a flange portion; 30: a spool valve; 40: a sealing member; 100: an electromagnetic valve; q: a fluid; f: a flow path; p: a protrusion length; l: a length; d: depth.

Detailed Description

An embodiment of an electromagnetic valve using a solenoid device according to the present invention will be described with reference to fig. 1 to 5.

For convenience of explanation, three axes perpendicular to each other are set as an X axis, a Y axis, and a Z axis. For example, an XY plane including an X axis and a Y axis is horizontal, and a Z axis is vertical.

The X-axis direction is the "axis O direction", the radial direction around the axis O may be simply referred to as the "radial direction", and the circumferential direction around the axis O may be simply referred to as the "circumferential direction".

The X-axis direction positive side corresponds to the "one side in the axis O direction", and the X-axis direction negative side corresponds to the "other side in the axis O direction".

In the present specification, the vertical direction, the horizontal direction, the upper side, and the lower side are terms used only for explaining the relative positional relationship of the respective parts. Therefore, the actual positional relationship of each part and the like may be different from the positional relationship and the like expressed by these terms.

< first embodiment >

First, a first embodiment of the solenoid valve will be explained.

As shown in fig. 1 and 2, the solenoid valve 100 has a solenoid device 1 and a valve mechanism 10 mounted on the X-axis direction positive side of the solenoid device 1.

The solenoid valve 100 is mounted on, for example, an automobile, and is used as a switching device for switching between passage and interruption of a fluid Q such as a liquid or a gas.

The valve mechanism 10 includes a cylindrical nozzle 20 and a cylindrical spool 30 disposed in the nozzle 20 so as to be movable in the X-axis direction.

The space between the nozzle 20 and the spool 30 constitutes a flow path F through which the fluid Q passes. Further, the nozzle 20 is formed with a plurality of side holes 201 penetrating the cylindrical wall and connected to the flow path F. The direction of passage of the fluid Q may be reversed from that shown in the drawings.

Further, a plurality of seal members 40 are disposed at intervals along the X-axis direction on the outer peripheral portion of the nozzle 20. Each seal member 40 is an elastic annular member and can prevent the fluid Q from leaking. Each seal member 40 is made of an elastic material such as urethane rubber.

The nozzle 20 has a flange portion 202 protruding radially outward at the end portion on the negative side in the X axis direction. An opening edge portion on the X-axis direction positive side of the housing 9 (housing main body 91) of the solenoid device 1 is crimped to the outer peripheral edge portion of the flange portion 202. Thereby, the valve mechanism 10 is coupled to the solenoid device 1.

Further, the washer 50 is disposed in a compressed state between the flange portion 202 and the solenoid device 1 (ring member 7). Due to the presence of this gasket 50, the valve mechanism 10 and the solenoid device 1 are hermetically sealed. The gasket 50 is made of an elastic material such as urethane rubber, for example, as in the sealing member 40.

The solenoid device 1 includes a bobbin 2, a plunger 3, a coil 4, a fixed core 5, a ring member 7, and a housing 9.

The bobbin 2 is a cylindrical member having a through hole 21. The through hole 21 penetrates the bobbin 2 in the X-axis direction. Further, the inner diameter of the through hole 21 is constant along the X-axis direction.

The bobbin 2 is made of various resin materials such as polyester and polyimide.

A coil 4 formed by winding a conductive wire material is disposed on an outer peripheral portion 22 of the bobbin 2.

The plunger 3 is inserted into the through hole 21 of the bobbin 2 from the positive side in the X-axis direction, and the fixed core 5 is inserted into the through hole from the negative side in the X-axis direction.

The fixed iron core 5 is excited by generating a magnetic field as the coil 4 is energized. Then, the plunger 3 is attracted by the excited fixed core 5. This enables the plunger 3 to move in the X-axis direction. That is, the plunger 3 is supported to be movable in the X-axis direction.

The fixed core 5 has a flange portion 59 protruding radially outward at the end portion on the negative side in the X axis direction. The flange portion 59 is in contact with the bobbin 2, whereby the fixed core 5 is positioned in the X-axis direction with respect to the bobbin 2 (coil 4).

The fixed core 5 has a recess 51 recessed toward the X-axis direction negative side on the surface on the X-axis direction positive side. The recess 51 has a bottom surface 511 and an inner peripheral surface (second inclined surface) 512, wherein the bottom surface 511 is perpendicular to the axis O (X axis).

The inner circumferential surface 512 is inclined with respect to the axis O so as to be away from the axis O from the negative side toward the positive side in the X-axis direction. In other words, the inner diameter of the recess 51 gradually increases from the negative side toward the positive side in the X-axis direction.

A hole 52 recessed toward the negative side in the X-axis direction is formed in the radial center portion of the bottom surface 511. The end portion of the pin (rod-like body) 53 on the X-axis direction negative side is inserted (press-fitted) into the hole 52. The pin 53 has an enlarged diameter portion 531 at its end on the positive side in the X axis direction.

The functions of the hole 52 and the pin 53 will be described in detail later.

The fixed iron core 5 is made of a soft magnetic material (soft magnetic metal material) such as iron, for example. This allows excitation to be performed so that the plunger 3 can be sufficiently attracted. The pin 53 may be made of a soft magnetic material similar to the fixed core 5, or may be made of a material other than the soft magnetic material.

A washer 61 is disposed in a compressed state between the flange portion 59 of the fixed core 5 and the bobbin 2, and a washer 62 is disposed in a compressed state between the ring member 7 and the bobbin 2.

These washers 61 and 62 are annular and arranged concentrically with the through hole 21 of the bobbin 2. Due to the presence of the gaskets 61, 62, the bobbin 2 is hermetically sealed between the flange portion 59 and the ring member 7.

The gaskets 61 and 62 are made of an elastic material such as urethane rubber, for example, as in the case of the seal member 40.

The plunger 3 has a recess 31 recessed toward the X-axis direction negative side on the surface on the X-axis direction positive side. The end portion of the spool 30 of the valve mechanism 10 on the negative side in the X axis direction is pressed into the recess 31. Thereby, the spool valve 30 can also move in the X-axis direction along with the movement of the plunger 3 in the X-axis direction.

The plunger 3 has a recess 32 recessed toward the X-axis direction positive side on the surface on the X-axis direction negative side.

In the present embodiment, the recess 31 and the recess 32 are connected by a through hole penetrating in the X-axis direction of the plunger 3. The inner diameter of the through hole is set smaller than the inner diameter of the recess 31. Therefore, a protruding portion 33 is formed at the boundary between the recess 31 and the recess 32.

The plunger 3 has an outer peripheral surface (first inclined surface) 34 at the end on the X-axis direction negative side. The outer peripheral surface 34 is inclined with respect to the axis O so as to approach the axis O from the positive side toward the negative side in the X-axis direction. In other words, the outer diameter of the end portion of the plunger 3 on the X-axis direction negative side gradually decreases from the X-axis direction positive side toward the negative side.

In a state where the plunger 3 is closest to the fixed core 5, the end portion of the plunger 3 on the X-axis direction negative side is positioned in the recess 51 of the fixed core 5. The outer peripheral surface 34 of the plunger 3 faces the inner peripheral surface 512 of the recess 51. With this configuration, interference is less likely to occur between the plunger 3 and the fixed core 5, and the plunger can be smoothly moved toward and away from each other.

A coil spring 8 for biasing the plunger 3 to the positive side in the X-axis direction and a nonmagnetic sheet member S are disposed between the plunger 3 and the fixed core 5.

The X-axis direction positive side of the coil spring 8 contacts the bottom 321 (protruding portion 33) of the recess 32 of the plunger 3, and the X-axis direction negative side of the coil spring 8 contacts the sheet member S.

In the non-excited state of the fixed core 5, the coil spring 8 can move the plunger 3 toward the X-axis direction positive side. Therefore, by switching the fixed core 5 between the excited state and the non-excited state, the plunger 3 can be alternately moved (i.e., can be reciprocated) to the negative side and the positive side along the X-axis direction.

On the other hand, the sheet member S is pressed toward the fixed core 5 by the contact of the negative side of the coil spring 8 in the X-axis direction with the sheet member S. Thereby, the sheet member S is fixed in contact with the bottom surface 511 of the recess 51 of the fixed core 5.

The plunger 3 and the fixed core 5 are formed with the recess 32 and the recess 51, respectively, and the coil spring 8 and the sheet member S are disposed inside them, whereby the length of the solenoid device 1 (the solenoid valve 100) in the X axis direction can be reduced.

In addition, in a state where the plunger 3 is closest to the fixed core 5, the X-axis direction negative side of the plunger 3 contacts the sheet member S. With this configuration, even if a magnetic force remains when the coil 4 is removed and the fixed core 5 is in the non-excited state, the plunger 3 and the fixed core 5 can be smoothly separated.

As shown in fig. 2, the sheet member S has a ring shape having a through hole (second through hole) S1 penetrating in the X axis direction. The pin 53 is press-fitted into the hole 52 in a state where the end on the negative side in the X-axis direction passes through the through hole S1 of the sheet member S. With this configuration, the sheet member S can be prevented from falling off from the fixed core 5 when the solenoid device 1 (solenoid valve 100) is assembled. Therefore, the assembling workability of the solenoid device 1 (solenoid valve 100) can be improved.

As described above, after the solenoid device 1 is assembled, the sheet member S is fixed to the fixed core 5 by the pressing force of the coil spring 8, and therefore, the pin 53 can be detached from the fixed core 5 and can be kept in the original state. That is, the pin 53 serves to temporarily fix the sheet member S to the fixed core 5 when the solenoid device 1 (solenoid valve 100) is assembled.

The thickness of the sheet member S is preferably about 0.1mm to 0.3mm, more preferably about 0.15mm to 0.25 mm. Thereby, when the fixed core 5 is in the non-excited state, the attraction force (influence of the residual magnetic force) of the fixed core 5 to the plunger 3 can be sufficiently reduced.

The sheet member S is made of, for example, stainless steel.

The length P of the enlarged diameter portion 531 of the pin 53 protruding from the fixed core 5 (protruding length) is set to be larger than the thickness of the sheet member S. With this configuration, when the solenoid device 1 is assembled, the diameter-enlarged part 531 does not contact the sheet member S, and therefore, unintentional deformation of the sheet member S and the like can be prevented. The projection length P is defined by the difference between the length L of the portion of the pin 53 (the body of the pin 53) other than the enlarged diameter portion 531 and the depth D of the hole 52.

The negative side of the plunger 3 in the X axis direction contacts a portion of the sheet member S that is radially outward of the portion that contacts the coil spring 8. According to this configuration, since the coil spring 8 can press the radial center portion of the sheet member S, the sheet member S can be more reliably fixed to the fixed core 5.

The outer diameter of the portion of the enlarged diameter portion 531 on the positive side in the X axis direction decreases from the negative side in the X axis direction toward the positive side, and the outer circumferential surface of the portion of the enlarged diameter portion 531 on the positive side in the X axis direction is tapered. Therefore, when the solenoid device 1 is assembled, even if the end portion of the coil spring 8 on the negative side in the X-axis direction comes into contact with the enlarged diameter portion 531 of the pin 53, the end portion can reliably move to the sheet member S side (i.e., a predetermined position) beyond the enlarged diameter portion 531.

The pin 53 may be fixed to the hole 52 by screw fastening, without being press-fitted. With either method, the pin 53 can be reliably fixed in the hole 52. However, according to the screw fastening, even if a defect (crack, defect, or the like) occurs in the sheet member S when the solenoid device 1 is assembled, the replacement work for a new sheet member S can be relatively easily performed.

The case 9 houses the bobbin 2, the plunger 3, the coil 4, the fixed core 5, and the ring member 7. The housing 9 has a housing main body 91 and a connector member 92.

The housing main body 91 is a cylindrical member extending in the X-axis direction. Further, by pressing the two opening edges of the case main body 91, respectively, the outer peripheral edge of the flange portion 202 of the nozzle 20 and the outer peripheral edge of the flange portion 59 of the fixed core 5 are covered. Thus, the bobbin 2, the plunger 3, the coil 4, the fixed core 5, and the ring member 7 are housed in the case 9, and the respective parts are fixed, thereby assembling the solenoid device 1.

The case main body 91 is made of a soft magnetic metal material such as iron, for example, as in the case of the fixed core 5.

A connector (not shown) for energizing the coil 4 is connected to the connector member 92. The connector member 92 is made of, for example, a resin material, as in the bobbin 2.

< second embodiment >

Next, a second embodiment of the electromagnetic valve will be described.

Fig. 3a and 3b are enlarged sectional views of the vicinity of the sheet member in the second embodiment of the solenoid valve.

Hereinafter, the solenoid valve 100 of the second embodiment will be described mainly in terms of differences from the solenoid valve 100 of the first embodiment, and descriptions of the same items will be omitted.

The solenoid valve 100 according to the second embodiment is similar to the solenoid valve 100 according to the first embodiment except that the recess 51 of the fixed core 5 has a groove 513 formed along the circumferential direction at the boundary between the bottom surface 511 and the inner circumferential surface 512.

The groove 513 can accommodate the outer peripheral edge of the sheet member S as shown in fig. 3a, or can accommodate the adhesive a as shown in fig. 3 b. This enables the sheet member S to be more reliably fixed to the fixed core 5.

As the adhesive a, for example, an epoxy adhesive or the like can be used.

< third embodiment >

Next, a third embodiment of the electromagnetic valve will be described.

Fig. 4 is an enlarged sectional view of the vicinity of the sheet member in the third embodiment of the solenoid valve.

Hereinafter, the solenoid valve 100 of the third embodiment will be described mainly in terms of differences from the solenoid valve 100 of the first embodiment, and descriptions of the same items will be omitted.

The solenoid valve 100 according to the third embodiment is the same as the solenoid valve 100 according to the first embodiment except that the structure of the pin fixed to the fixed core 5 is different.

The pin 54 of the third embodiment is a projection (rod-like body) that projects toward the X-axis direction positive side from the bottom surface (surface on the X-axis direction positive side) 511 of the recess 51 of the fixed core 5 and constitutes one component with the fixed core 5.

Before the solenoid device 1 is assembled, the pin 54 has a cylindrical shape as shown by the two-dot chain line in fig. 4.

On the other hand, when the solenoid device 1 is assembled, the cylindrical pin 54 is passed through the through hole S1 of the sheet member S, and then the end portion on the positive side in the X-axis direction is deformed to form the enlarged diameter portion 541. This can prevent the sheet member S from falling off the fixed core 5. Therefore, the assembling workability of the solenoid device 1 can be improved.

< fourth embodiment >

Next, a fourth embodiment of the electromagnetic valve will be explained.

Fig. 5 is an enlarged sectional view of the vicinity of the sheet member in the fourth embodiment of the solenoid valve.

Hereinafter, the solenoid valve 100 of the fourth embodiment will be described mainly in terms of differences from the solenoid valve 100 of the first embodiment, and descriptions of the same items will be omitted.

The solenoid valve 100 according to the fourth embodiment is the same as the solenoid valve 100 according to the first embodiment except that the pin 53 is omitted.

The solenoid valve 100 of the fourth embodiment can be assembled as follows.

First, the tip rod (rod-shaped body) of the jig is passed through the through hole S1 of the sheet member S, and the end of the tip rod of the jig is inserted into the hole 52. This prevents the sheet member S from falling off the fixed core 5. Further, a protruding portion that protrudes radially outward and performs the same function as the enlarged diameter portion 531 may be provided at the distal end portion of the distal end rod.

Next, in this state, for example, after the coil spring 8, the plunger 3, the ring member 7, the spool 30, and the nozzle 20 are arranged in this order along the tip rod, the opening edge portion on the X-axis direction positive side of the housing main body 91 is pressed.

Thereafter, the jig is detached from the solenoid valve 100.

The solenoid device of the present invention has been described above with reference to the illustrated embodiments, but the present invention is not limited thereto, and each part constituting the solenoid device may be replaced with any component having any structure that can exhibit the same function. In addition, any structure may be added.

For example, the recess 31 and the recess 32 of the plunger 3 may not be connected. However, since the solenoid valve 100 of the fourth embodiment is assembled as described above, the recess 31 and the recess 32 need to be connected to each other.

The urging member is not limited to the coil spring, and may be a plate spring, a torsion spring, or the like.

The member attached to the solenoid device is not limited to the valve mechanism 10, and may be a valve body having a spool valve housed in a spool hole.

Claims (10)

1. A solenoid device, characterized in that,

the solenoid device includes:

a cylindrical bobbin having a through hole penetrating in an axial direction;

a plunger inserted into one axial side of the through hole and supported to be movable in an axial direction;

a coil wound around an outer peripheral portion of the bobbin, the coil generating a magnetic force in response to energization to move the plunger in an axial direction;

a fixed core inserted into the other axial side of the through hole;

a biasing member disposed between the plunger and the fixed core, and biasing the plunger toward one axial side; and

and a non-magnetic sheet member disposed between the plunger and the fixed core so as to be in contact with the other axial side of the plunger, the sheet member having an annular shape with a second through hole through which the rod-shaped body can pass.

2. The solenoid device of claim 1,

the fixed iron core is provided with a hole part which is sunken towards the other side in the axial direction on the surface of one side in the axial direction,

the rod-shaped body is a pin partially inserted into the hole, or a jig partially inserted into the hole.

3. The solenoid device of claim 2,

the pin is pressed or screwed into the bore.

4. The solenoid device of claim 1,

the rod-shaped body is a pin that protrudes from one axial side surface of the fixed core toward one axial side and forms one component with the fixed core.

5. The solenoid device according to any one of claims 2 to 4,

the pin has an enlarged diameter portion at one axial end thereof.

6. The solenoid device of claim 5,

the length of the diameter-expanded portion protruding from the fixed core is greater than the thickness of the sheet member.

7. The solenoid device according to any one of claims 1 to 4,

by bringing the other axial side of the urging member into contact with the sheet member, the sheet member is pressed toward the fixed core.

8. The solenoid device according to any one of claims 1 to 4,

the plunger has a recess recessed toward one axial side on the other axial side surface thereof,

one axial side of the urging member is in contact with a bottom surface of the recess of the plunger.

9. The solenoid device according to any one of claims 1 to 4,

the fixed iron core has a recess depressed toward the other axial side on a face on one axial side thereof,

the sheet member is in contact with a bottom surface of the recess of the fixed core.

10. The solenoid device of claim 9,

the recessed portion has a groove formed along a circumferential direction at a boundary portion between the bottom surface and the inner peripheral surface.

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