CN110894891A - Solenoid, solenoid valve and assembly method - Google Patents
Solenoid, solenoid valve and assembly method Download PDFInfo
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- CN110894891A CN110894891A CN201910836699.8A CN201910836699A CN110894891A CN 110894891 A CN110894891 A CN 110894891A CN 201910836699 A CN201910836699 A CN 201910836699A CN 110894891 A CN110894891 A CN 110894891A
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- Prior art keywords
- core
- yoke
- axial direction
- solenoid
- collar
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
- F16K31/06—Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid
- F16K31/0675—Electromagnet aspects, e.g. electric supply therefor
Abstract
The invention provides a solenoid, an electromagnetic valve and an assembly method, in the solenoid (10), the decrease of the attraction force of a plunger (13) caused by the variation of a gap (G) between a 1 st iron core (17) and a yoke (21) is prevented. The solenoid (10) has a cylindrical 2 nd core (49). The 2 nd core (49) has a flange portion (49a) on the rear side in the axial direction, and is supported by the yoke (21) so as to be movable in the axial direction in a state where the inner peripheral surface of the core itself is in contact with the outer peripheral surface of the yoke (21) on the rear side in the axial direction. The 2 nd core (49) has a flange portion (49a) axially sandwiched between the bobbin (25) and the bottom portion (30a) of the housing (30).
Description
Technical Field
The present invention relates to a solenoid for an electromagnetic valve, an electromagnetic pump, or the like.
Background
A solenoid is known, which includes: a cylindrical and magnetic housing; a cylindrical bobbin; a magnetic iron core; a plunger that is movable in an axial direction; and an elastic member disposed between the flange portion of the core and the bobbin in the axial direction.
For example, a solenoid described in patent document 1 includes a yoke that is a cylindrical and magnetic housing. The yoke has a bottom on one side in the axial direction of the cylinder. A cylindrical bobbin around which a coil is wound is disposed in the cylinder of the yoke.
A magnetic 1 st fixed iron core is inserted into the other axial side of the cylinder of the bobbin. The 1 st fixed core has a flange portion extending in the radial direction at the other end in the axial direction. The flange portion of the 1 st fixed core is located on the other axial side of the bobbin outside the cylinder of the bobbin, and presses the step portion of the yoke from the other axial side toward the one axial side. By this pressing, the 1 st fixed core is positioned in the axial direction. A wave washer as an elastic member is disposed between the flange portion of the 1 st fixed core and the bobbin in the axial direction.
A 2 nd fixed core as a yoke having magnetism is inserted into one side in the axial direction in the cylinder of the bobbin. The 2 nd fixed core has a flange portion extending in the radial direction at one end in the axial direction. The flange of the 2 nd fixed core is in contact with the end face of the bobbin outside the cylinder of the bobbin. The wave washer biases the flange portion of the 2 nd fixed core toward one side via the bobbin to press the bottom portion of the yoke. By this pressing, the 2 nd fixed core is positioned in the axial direction.
Patent document 1: japanese patent laid-open No. 2012 and 204575
In the solenoid described in patent document 1, when power is supplied to the coil of the bobbin, a magnetic path is generated around the coil. Thus, the plunger disposed in the cylinder of the 2 nd fixed core is pulled to the other side in the axial direction by the magnetic force. In the axial direction, a gap is provided between a 1 st fixed core positioned by pressing against a step portion of a yoke as a housing and a 2 nd fixed core positioned by pressing against a bottom portion of the yoke. This gap plays the following role between the 1 st fixed core and the 2 nd fixed core: the magnetic induction lines of the magnetic circuit are returned to the coil side after extending from the coil side along the magnetic plunger.
In the solenoid having this configuration, there is a possibility that the attractive force for pulling the plunger to the other side in the axial direction by the magnetic force is reduced due to the variation of the gap in the axial direction. Specifically, when the 2 nd fixed core moves from one side to the other side in the axial direction against the urging force of the wave washer due to vibration or the like, the gap becomes smaller than the design value. Then, the magnetic circuit generated around the coil is disturbed, resulting in a decrease in the attraction force that pulls the plunger to the other axial side.
As described above, the solenoid disclosed in patent document 1 has the following problems: the gap between the 1 st fixed core and the 2 nd fixed core as a yoke varies, and the suction force (plunger suction force) that pulls the plunger to the other axial side is reduced.
Disclosure of Invention
An exemplary 1 st invention of the present application is a solenoid including: a cylindrical and magnetic housing having a bottom portion disposed on one axial side along a cylindrical axis and a step portion protruding radially inward on the other axial side in the cylinder; a cylindrical bobbin disposed in the cylinder of the housing in a state in which a coil is wound; a magnetic 1 st core having a flange portion extending in a radial direction on the other axial side, the 1 st core being positioned in the axial direction by pressing the flange portion from the other axial side toward one side toward the step portion of the housing on the outside of the cylinder of the bobbin in a state where the one axial side is positioned in the cylinder of the bobbin; a cylindrical and magnetic yoke that is positioned on one side in the axial direction of the 1 st core in the cylinder of the bobbin and is arranged with a gap in the axial direction from the 1 st core; a plunger axially movable within the barrel of the yoke; and an elastic member disposed between the flange portion of the 1 st core and the bobbin in an axial direction, wherein the solenoid includes: a collar that supports the 1 st core and the yoke so as to be axially separated from each other with an inner circumferential surface thereof in contact with an outer circumferential surface of one side of the 1 st core in the axial direction and with an inner circumferential surface thereof in contact with an outer circumferential surface of the other side of the yoke in the axial direction; and a cylindrical 2 nd core having a flange portion extending in a radial direction on one axial side, supported by the yoke so as to be movable in the axial direction in a state where an inner peripheral surface thereof is in contact with an outer peripheral surface on one axial side of the yoke, and having the flange portion sandwiched between the bobbin and the bottom portion of the housing in the axial direction.
According to exemplary 1 st aspect of the present invention, there is provided a solenoid capable of preventing a decrease in plunger attraction force due to a variation in a gap between an iron core and a yoke.
Drawings
Fig. 1 is a sectional view of a solenoid valve of an embodiment.
Fig. 2 is a sectional view showing a part of a solenoid of the solenoid valve of the embodiment enlarged from fig. 1.
Fig. 3 is a sectional plan view of a wave washer used as an elastic member for the solenoid of the present embodiment.
Fig. 4 is a sectional view showing an axial center portion of the solenoid of the embodiment.
Description of the reference symbols
1: an electromagnetic valve; 11: a shaft portion; 13: a plunger; 17: a 1 st iron core; 17 a: a flange portion; 17 b: a main body portion; 17 c: a recess; 21: a yoke; 21 a: a central portion; 21 b: a recess; 25: a bobbin; 29: a coil; 30: a housing; 30 a: a bottom; 30 b: a step portion; 30 c: a crimping part; 41: a collar; 41 a: a claw (convex portion); 49: a 2 nd iron core; 49 a: a flange portion.
Detailed Description
Hereinafter, a solenoid valve according to an embodiment of the present invention will be described with reference to the drawings. In the present embodiment, a description will be given of a solenoid valve in which a sliding valve member that outputs pressure-regulated oil is provided in a solenoid. In the following drawings, in order to make the structures easier to understand, the actual structures may be different in scale, number, and the like from those of the structures.
In the drawings, an XYZ coordinate system is appropriately shown as a three-dimensional orthogonal coordinate system. In the XYZ coordinate system, the Z-axis direction is a direction parallel to the axial direction of the central axis J shown in fig. 1. The X-axis direction is a direction parallel to the short-side direction of the solenoid valve shown in fig. 1. The Y-axis direction is a direction perpendicular to both the X-axis direction and the Z-axis direction.
In the following description, the positive side (+ Z side) in the Z-axis direction is referred to as "rear side", and the negative side (-Z side) in the Z-axis direction is referred to as "front side". The rear side and the front side are only names for explanation, and do not limit the actual positional relationship and direction. Unless otherwise specified, a direction parallel to the central axis J (Z-axis direction) is simply referred to as "axial direction", a radial direction about the central axis J is simply referred to as "radial direction", and a circumferential direction about the central axis J, that is, a direction (θ direction) around the central axis J is simply referred to as "circumferential direction".
In addition, in the present specification, the case of extending in the axial direction includes a case of extending in a direction inclined in a range of less than 45 ° with respect to the axial direction, in addition to a case of extending strictly in the axial direction (Z-axis direction). In addition, in the present specification, the radial direction extension includes a case of extending in a direction inclined in a range of less than 45 ° with respect to the radial direction, in addition to a case of extending strictly in the radial direction, that is, in a direction perpendicular to the axial direction (Z-axis direction).
The axial direction (Z-axis direction) in each drawing corresponds to the axial direction of the present invention. The rear side in the axial direction in the drawings corresponds to one side of the present invention. The front side in the axial direction in the drawings corresponds to the other side in the axial direction in the present invention.
< integral Structure >
Fig. 1 is a sectional view of a solenoid valve of an embodiment. As shown in fig. 1, the solenoid valve 1 has a solenoid 10 and a sliding valve element 50. The solenoid 10 and the sliding valve member 50 are arranged in the axial direction. When the coil 29 is energized, the solenoid 10 moves the shaft 11 from the rear side to the front side in the axial direction by magnetic force generated around the coil 29. The slide valve member 50 is located on the axial front side of the solenoid 10. The slide valve element 50 has a spool valve 52 that is movable in the axial direction in accordance with the movement of the shaft portion 11 of the solenoid. The spool 52 is housed in the valve body 51 so as to be movable in the axial direction. Hereinafter, each component will be described in detail.
< sliding valve element 50 >
(valve body 51)
The valve body 51 has a cylindrical shape and has a plurality of ports 55 through which oil flows in and out. The valve body 51 extends in the axial direction and has a slide hole portion 53 into which the spool 52 is inserted. The slide hole portion 53 axially penetrates the valve body 51. The slide hole portion 53 is connected to a plurality of ports 55. A flange portion 54 protruding in the radial direction is provided at the rear end portion of the valve body 51. The flange portion 54 is provided at an end portion of the solenoid 10 on the front side in the axial direction of the housing 30, and is fixed to the solenoid 10 by being fastened by a pressure-contact portion 30 c.
(sliding valve 52)
The spool 52 has: a plurality of valve portions 52a having an outer diameter slightly smaller than the inner diameter of the slide hole portion 53; and a valve shaft portion 52b that connects the plurality of valve portions 52a aligned in the axial direction to each other. The valve shaft portion 52b has a smaller diameter than the valve portion 52 a. When the spool valve 52 moves in the axial direction, the valve portion 52a opens and closes the port 55. A closing member 57 for closing the front opening of the slide hole 53 is inserted into the axial front end of the valve body 51. A compression spring 60 is disposed between the closing member 57 and the axial front end of the spool 52. The spool valve 52 is urged to the rear side in the axial direction by a compression spring 60.
< solenoid 10 >
Fig. 2 is a sectional view showing a part of the solenoid 10 of the solenoid valve 1 enlarged from fig. 1. As shown in fig. 2, the solenoid 10 has a housing 30, a bobbin 25, a 1 st iron core 17, a yoke 21, a collar 41, a plunger 13, and a wave washer 42 as an elastic member.
(outer cover 30)
The cylindrical housing 30 is made of a magnetic metal material. The housing 30 has: a bottom portion 30a disposed on the rear side in the axial direction; a stepped portion 30b that protrudes radially inward on the axial front side in the cylinder; and a pressure-bonding section 30c provided at one end of the front side in the axial direction. The shape of the cylindrical housing 30 is not limited to a strict cylindrical shape. But may also be polygonal in cross-sectional shape. That is, the configuration of the housing 30 may also be a configuration having a hollow and polygonal shape in cross section. Other cylindrical members among the members of the solenoid 10 may be configured to have a polygonal cross section and be hollow, without being limited to the housing 30.
The cylindrical body and the bottom portion 30a of the cylindrical case 30 are made of the same metal material and are formed by the same forming process. The cylindrical body and the bottom portion 30a may be molded in different molding steps, and the bottom portion 30a may be assembled to the cylindrical body in a subsequent step.
(reel 25)
A coil 29 for generating a magnetic force is wound on the bobbin 25. A cylindrical bobbin 25 made of a nonmagnetic material such as resin is disposed at the center in the axial direction in the cylinder of the housing 30.
(1 st iron core 17)
The 1 st core 17 made of a magnetic material has a flange portion 17a extending radially outward on the front side in the axial direction. The portion of the 1 st core 17 other than the flange portion 17a is a main body portion 17 b. The body 17b is located in the cylinder of the bobbin 25. On the other hand, the flange 17a of the 1 st core 17 is positioned on the axial front side of the bobbin 25.
The 1 st core 17 presses the flange portion 17a against the stepped portion 30b of the housing 30 from the front side toward the rear side in the axial direction. This pressing is performed by sandwiching the flange portion 54 of the sliding valve element 50 and the flange portion 17a of the 1 st core 17 between the pressure-bonding section 30c provided at one end of the axial front side of the housing 30 and the stepped section 30b of the housing 30. The 1 st core 17 is positioned in the axial direction by pressing the flange portion 17a against the step portion 30b of the housing 30.
(yoke 21)
The yoke 21 made of a magnetic material is disposed on the rear side in the axial direction of the 1 st core 17 in the cylinder of the bobbin 25. The diameter of the axial center portion 21a of the yoke 21 is larger than the diameters of both end portions. The outer peripheral surface of the central portion 21a of the yoke 21 contacts the inner peripheral surface of the bobbin 25.
(plunger 13)
The plunger 13 having a cylindrical shape and made of a magnetic material is movable in the axial direction in the cylinder of the yoke 21, and is guided by the yoke 21 to move in the axial direction.
(shaft part 11)
The 1 st core 17 has a through circular hole along the core center axis. The shaft portion 11 penetrates through a through circular hole of the 1 st core 17. An axial rear end surface of the shaft portion 11 is in contact with an axial front end surface of the plunger 13. A retainer ring 12 for preventing the shaft portion 11 from moving excessively to the front side in the axial direction is fitted to the rear side in the axial direction of the shaft portion 11. The shaft portion 11 is movable in the axial direction together with the plunger 13 while being guided to move in the axial direction by the 1 st core 17.
(wave washer 42)
Fig. 3 is a sectional plan view of a wave washer 42 used as an elastic member in the solenoid 10. As shown in fig. 3, the wave washer 42 has a shape obtained by bending a general washer shape in a wave shape. When a force is applied from both sides in the gasket thickness direction, the wave washer 42 is less deflected than when no force is applied. At this time, the wave washer 42 exerts a reaction force in the washer thickness direction, which is intended to return the deflection to the original state. The reaction force acts as an urging force on a member to be urged.
(coil 29)
The coil 29 is wound around the bobbin 25. The coil 29 is wound in the circumferential direction along the outer circumferential surface of the cylindrical portion 25a of the bobbin 25 on the radially outer side. Both ends of the coil 29 are electrically connected to the terminals 38. The bobbin 25 around which the coil 29 is wound and the terminal body portion 37 are made of the same resin material.
When a current flows through the coil 29 by energization, a magnetic path is generated around the coil 29. Thus, the plunger 13 is pulled from the rear side to the front side in the axial direction by the magnetic force. At this time, the plunger 13 presses the shaft portion 11 and the spool 52 of the slide valve element 50 against the urging force of the compression spring 60 of the slide valve element 50, and moves to the front side in the axial direction. On the other hand, when no current flows through the coil 29 by energization, the magnetic circuit existing around the coil 29 disappears. Then, the plunger 13 pulled forward in the axial direction by the magnetic force moves rearward in the axial direction together with the shaft portion 11 and the spool 52 of the slide valve element 50 by the biasing force of the compression spring 60.
(Lantern ring 41)
The cylindrical collar 41 shown in fig. 2 is made of a nonmagnetic material such as resin. The axial rear end of the 1 st core 17 is located in the axial front region of the cylinder of the collar 41. Further, the front end of the yoke 21 in the axial direction is located in a rear region in the axial direction in the cylinder of the collar 41.
The collar 41 has its inner peripheral surface in close contact with the outer peripheral surface of the 1 st core 17 on the rear side in the axial direction, and has its inner peripheral surface in close contact with the outer peripheral surface of the yoke 21 on the front side in the axial direction. The axial rear end of the 1 st core 17 is press-fitted into the cylinder of the collar 41 from the axial front side. Further, the front end of the yoke 21 in the axial direction is press-fitted into the cylinder of the collar 41 from the rear side in the axial direction. The collar 41 supports the 1 st core 17 and the yoke 21 so as to be separated in the axial direction. In the axial direction, a gap G exists between the 1 st core 17 and the yoke 21.
(the 2 nd iron core 49)
A cylindrical 2 nd core 49 is housed in the cylinder of the housing 30 at a position on the axial rear side of the bobbin 25. The 2 nd core 49 has a flange portion 49a expanded in the radial direction on the rear side in the axial direction. The rear end of the yoke 21 in the axial direction is lightly pressed into the cylinder of the 2 nd core 49. The yoke 21 supports the 2 nd core 49 to be movable in the axial direction. In the circumferential direction, the outer circumferential surface of the yoke 21 and the inner circumferential surface of the 2 nd core are in contact over the entire circumferential region. The flange portion 49a of the 2 nd core 49 is axially sandwiched between the bobbin 25 and the bottom portion 30a of the housing 30.
In FIG. 2, L1The length is a predetermined region in the axial direction of the combination of the collar 41, the 1 st core 17, and the yoke 21, and the 1 st core 17 and the yoke 21 are supported by the collar 41. Specifically, length L1Is a length from a contact surface with the stepped portion 30b in the flange portion 17a of the 1 st core 17 to one end on the rear side in the axial direction of the yoke 21. L is2Is a length from an end surface on the axial front side of the stepped portion 30b of the housing 30 to the bottom surface of the bottom portion 30a of the housing 30. As shown in fig. 2, length L1Specific length L2Is small.
< method for assembling solenoid 10 >
In the process of assembling the solenoid 10, a step of inserting the plunger 13 into the cylinder of the yoke 21 is performed. Further, a step of inserting the shaft portion 11 from the rear side in the axial direction and penetrating the through-hole of the 1 st core 17 is performed. Further, the step of supporting the yoke 21 and the 1 st core 17, which have the shaft portion 11 inserted through the circular hole after the plunger 13 is inserted into the cylinder, on the collar 41 is performed. After the above steps, a step of inserting the combination of the yoke 21, the plunger 13, the collar 41, the 1 st core 17, and the shaft portion 11 into the cylinder of the bobbin 25 from the front side in the axial direction is performed. Next, a step of inserting the 2 nd core 49 into the cylinder of the bobbin 25 from the rear side in the axial direction is performed. Then, a step of inserting the combination of the 2 nd core 49, the bobbin 25, the plunger 13, the collar 41, the 1 st core 17, and the shaft portion 11 into the hollow of the housing 30 from the opening on the front side in the axial direction of the housing 30 is performed. Finally, after the flange portion 54 of the valve body 51 of the sliding valve member 50 is inserted from the opening of the housing 30 to the inside, the end portion on the axial front side of the housing 30 is fastened, and the crimp portion 30c is provided.
In addition, the assembling method of the solenoid 10 is not limited to the above-described order.
< Effect/Effect of solenoid valve 1 >
(1) The 2 nd core 49, which is not present in the solenoid described in patent document 1, is biased toward the rear side in the axial direction via the bobbin 25 by the biasing force of the wave washer 42 in the cylinder of the housing 30. The 2 nd core 49 is urged by the wave washer 42 to abut against the bottom portion 30a of the housing 30, and is positioned in the axial direction. On the other hand, the 1 st core 17 and the yoke 21 are supported by the collar 41 with their outer peripheral surfaces in close contact with the inner peripheral surface of the collar 41. The 1 st core 17 is positioned in the axial direction by pressing the flange portion 17a against the stepped portion 30b of the housing 30 as described above. By this positioning, the collar 41 and the yoke 21 are also positioned in the axial direction.
The bobbin 25 and the 2 nd core 49 urged by the wave washer 42 move forward in the axial direction against the urging force of the elastic member due to vibration or the like. At this time, the bobbin 25 and the 2 nd core 49 are separated, and the combination of the 1 st core 17, the collar 41, and the yoke 21 positioned does not move regardless of the force of the wave washer 42. Therefore, the gap G in the axial direction between the 1 st core 17 supported by the collar 41 and the yoke 21 is maintained constant. Thus, according to the solenoid 10 of the embodiment, the plunger suction force can be prevented from being reduced due to the fluctuation of the gap G.
Further, since the 1 st core 17 and the yoke 21 are forcibly press-fitted into the collar 41, they do not move independently from the collar 41. The 1 st core 17 and the yoke 21 may be bonded or welded to the collar 41 in order to improve the effect of preventing the 1 st core 17 and the yoke 21, which are independent from the collar 41, from moving in the axial direction.
(2) As described above, the 2 nd core 49 is supported by the yoke 21 so as to be movable in the axial direction in a state where the entire circumferential region of the inner circumferential surface is in contact with the entire circumferential region of the outer circumferential surface of the yoke 21. The 2 nd core 49 is biased from the front side toward the rear side in the axial direction by the wave washer 42, and is pressed against the bottom portion 30a of the housing 30. The 2 nd core 49 moves toward the front side in the axial direction against the urging force of the wave washer 42 due to vibration or the like. This movement is performed in a state where the entire circumferential region of the inner circumferential surface of the 2 nd core 49 is in contact with the entire circumferential region of the outer circumferential surface of the yoke 21. Thus, according to the solenoid 10 of the embodiment, the yoke 21 and the 2 nd core 49 can be positioned concentrically without moving the 2 nd core 49 in the direction perpendicular to the axial direction. Further, according to the solenoid 10 of the embodiment, the play of the 2 nd core 49 in the direction perpendicular to the axial direction with the movement in the axial direction can be prevented.
(3) Length L shown in fig. 21Specific length L2Is small. Therefore, as shown in the drawing, a gap C is provided between one end of the yoke 21 on the rear side in the axial direction and the bottom surface of the bottom portion 30a of the housing 30 in the cylinder of the housing 30. Even if the axial length of the combination of the yoke 21, the collar 41, and the 1 st core 17 becomes larger than the design due to the axial dimension error of the yoke 21, the collar 41, and the 1 st core 17, the enlarged portion is accommodated in the gap C. Therefore, the enlarged portion is located on the axial front side of the yoke 21, and the flange portion 17a of the 1 st core 17 is prevented from separating from the step portion 30b of the housing 30. This prevention maintains the state in which the flange portion 17a of the 1 st core 17 is pressed against the step portion 30b of the housing 30, and thus maintains the state in which the combination of the 1 st core 17, the collar 41, and the yoke 21 is accurately positioned in the axial direction. Therefore, according to the solenoid 10 of the embodiment, it is possible to prevent the flange portion 17a of the 1 st core 17 from separating from the step portion 30b of the housing 30 due to the dimensional error described above, and thus to prevent the positioning accuracy of the 1 st core 17, the collar 41, and the yoke 21 from being lowered.
(4) According to the assembling method of the solenoid 10 of the embodiment, the combination of the 2 nd core 49, the bobbin 25, the plunger 13, the collar 41, and the 1 st core 17 is assembled outside the case 30 where the assembling work is easy, and then inserted into the hollow of the case 30. Therefore, the assembling workability can be improved.
< example >
Fig. 4 is a sectional view showing an axial center portion of the solenoid 10 of the embodiment. The solenoid 10 of the embodiment has the same structure as the solenoid 10 of the embodiment unless otherwise described below.
The collar 41 of the solenoid 10 of the embodiment has the claw 41a as a convex portion protruding from the inner peripheral surface toward the inside in the radial direction at both the front and rear end portions in the axial direction. The two claws 41a protrude from the inner circumferential surface of the collar 41 toward the radially inner side in the entire circumferential region.
The solenoid 10 of the embodiment has a fixing portion for fixing the 1 st core 17 and the yoke 21 to the collar 41. The fixing portion has a claw 41a on the front side in the axial direction of the collar 41 and a recess 17c provided in the 1 st core 17 so as to fix the 1 st core 17 to the collar 41. The recess 17c of the 1 st core 17 is recessed over the entire circumferential region. The front claws 41a of the collar 41 are fitted into the recesses 17c of the 1 st core 17. By this fitting, the 1 st core 17 is fixed to the collar 41.
The fixing portion has a claw 41a on the rear side in the axial direction of the collar 41 and a recess 21b provided in the yoke 21 so as to fix the yoke 21 to the collar 41. The recess 21b of the yoke 21 is recessed over the entire circumferential region. The claws 41a of the collar 41 protrude over the entire circumferential area. The rear claws 41a of the collar 41 in the axial direction are fitted into the recesses 21b of the yoke 21. By this fitting, the yoke 21 is fixed to the collar 41.
< Effect of operation of the solenoid 10 of the embodiment >
(5) When a force toward the front side in the axial direction is applied to only the 1 st core 17 out of the 1 st core 17 and the collar 41 due to vibration or the like, the claw 41a of the collar 41 hooks into the recess 17c of the 1 st core 17. By this hooking, the 1 st iron core 17 is prevented from moving independently to the front side in the axial direction from the collar 41 together with the sliding valve element 50 and the housing 30.
When a force toward the rear side in the axial direction is applied to only the collar 41 and the yoke 21 among the 1 st core 17, the collar 41, and the yoke 21 due to vibration or the like, the claws 41a of the collar 41 hook into the recesses 17c of the 1 st core 17. By this hooking, the collar 41 and the yoke 21 are prevented from moving independently to the rear side in the axial direction from the 1 st iron core 17.
When a force toward the front side in the axial direction is applied to only the 1 st core 17 and the collar 41 among the 1 st core 17, the collar 41, and the yoke 21 due to vibration or the like, the claws 41a of the collar 41 are hooked on the recesses 21b of the yoke 21. By this hooking, the 1 st iron core 17 and the collar 41 are prevented from moving independently to the front side in the axial direction from the yoke 21 together with the sliding valve element 50 and the housing 30.
When a force toward the rear side in the axial direction is applied to only the yoke 21 among the 1 st core 17, the collar 41, and the yoke 21 due to vibration or the like, the claws 41a of the collar 41 hook into the recesses 21b of the yoke 21. By this hooking, the yoke 21 is prevented from moving independently to the rear side in the axial direction from the 1 st iron core 17 and the collar 41.
Therefore, in the solenoid of the embodiment, even if strong vibration or the like occurs in the axial direction, the 1 st core 17 and the yoke 21 can be continuously locked at the predetermined position of the collar 41. Therefore, according to the solenoid 10 of the embodiment, it is possible to prevent the plunger suction force from being lowered by changing the gap G by independently moving the 1 st iron core 17 from the collar 41 and the yoke 21 to the front side in the axial direction. In addition, according to the solenoid 10 of the embodiment, it is possible to prevent the plunger suction force from being lowered by changing the gap G by independently moving the collar 41 and the yoke 21 from the 1 st core 17 to the rear side in the axial direction. In addition, according to the solenoid 10 of the embodiment, it is possible to prevent the plunger suction force from being lowered by changing the gap G by independently moving the 1 st iron core 17 and the collar 41 from the yoke 21 to the front side in the axial direction. In addition, according to the solenoid 10 of the embodiment, it is possible to prevent the plunger suction force from being lowered by changing the gap G by independently moving the yoke 21 from the 1 st core 17 and the collar 41 to the rear side in the axial direction.
Instead of providing the claws 41a on the collar 41 and providing the recesses 17c into which the claws 41a are fitted on the 1 st core 17, the 1 st core 17 may be provided with the claws fitted in the recesses and provided with the recesses on the inner peripheral surface of the collar 41. Instead of providing the claws 41a on the collar 41 and providing the yoke 21 with the recesses 21b into which the claws 41a are fitted, the yoke 21 may be provided with the claws fitted into the recesses and providing the inner peripheral surface of the collar 41 with the recesses.
While the preferred embodiments and examples of the present invention have been described above, the present invention is not limited to the above embodiments and examples, and various modifications and changes can be made within the scope of the present invention. The embodiments, examples, and modifications thereof are included in the scope and gist of the invention, and are also included in the invention described in the claims and the equivalent scope thereof.
Claims (8)
1. A solenoid, having: a cylindrical and magnetic housing having a bottom portion disposed on one axial side along a cylindrical axis and a step portion protruding radially inward on the other axial side in the cylinder; a cylindrical bobbin disposed in the cylinder of the housing in a state in which a coil is wound; a magnetic 1 st core having a flange portion extending in a radial direction on the other axial side, the 1 st core being positioned in the axial direction by pressing the flange portion from the other axial side toward one side toward the step portion of the housing on the outside of the cylinder of the bobbin in a state where the one axial side is positioned in the cylinder of the bobbin; a cylindrical and magnetic yoke located on one side of the 1 st core in an axial direction in the cylinder of the bobbin and disposed with a gap in the axial direction from the 1 st core; a plunger axially movable within the barrel of the yoke; and an elastic member disposed between the flange portion of the 1 st core and the bobbin in an axial direction, wherein,
the solenoid includes:
a collar that supports the 1 st core and the yoke so as to be axially separated from each other with an inner circumferential surface thereof in contact with an outer circumferential surface of one side of the 1 st core in the axial direction and with an inner circumferential surface thereof in contact with an outer circumferential surface of the other side of the yoke in the axial direction; and
and a cylindrical 2 nd core having a flange portion extending in a radial direction on one axial side, supported by the yoke so as to be movable in the axial direction with an inner peripheral surface thereof in contact with an outer peripheral surface on one axial side of the yoke, and having the flange portion interposed between the bobbin and the bottom portion of the housing in the axial direction.
2. The solenoid of claim 1,
the solenoid has a fixing portion for fixing the 1 st iron core and the yoke to the non-magnetic collar.
3. The solenoid of claim 2,
the fixing portion has: a convex portion provided on an outer peripheral surface of the 1 st core; and a concave portion provided on an inner peripheral surface of the collar, into which the convex portion is fitted, or the fixing portion includes: a convex portion provided on an inner peripheral surface of the collar; and a concave portion provided on an outer peripheral surface of the 1 st core, into which the convex portion provided on an inner peripheral surface of the collar is fitted.
4. The solenoid of claim 2 or 3,
the fixing portion has: a convex portion provided on an outer peripheral surface of the yoke; and a concave portion provided on an inner peripheral surface of the collar, into which the convex portion is fitted, or the fixing portion includes: a convex portion provided on an inner peripheral surface of the collar; and a concave portion provided on an outer peripheral surface of the yoke, into which the convex portion provided on an inner peripheral surface of the collar is fitted.
5. The solenoid according to any one of claims 1 to 4,
the 2 nd core is supported by the yoke so as to be movable in the axial direction in a state where the entire circumferential region of the inner circumferential surface is in contact with the entire circumferential region of the outer circumferential surface of the yoke.
6. The solenoid according to any one of claims 1 to 5,
a length from a contact surface with the step portion in the flange portion of the 1 st core to one end of the yoke on one side in an axial direction in a combination of the collar, the 1 st core supported by the collar, and the yoke is smaller than a length from the step portion of the housing to a bottom surface of the bottom portion.
7. A solenoid valve having a sliding valve member and a solenoid, wherein,
the solenoid valve has the solenoid of any one of claims 1 to 6 as the solenoid.
8. An assembling method of assembling the solenoid according to any one of claims 1 to 6,
the assembling method comprises the following steps:
inserting the 2 nd iron core into the cylinder of the bobbin from one side in the axial direction;
inserting the plunger into the barrel of the yoke;
supporting the yoke and the 1 st iron core, in which the plunger is inserted in the cylinder, to the collar;
inserting the combination of the yoke, the plunger, the collar, and the 1 st iron core into the cylinder of the bobbin from the other axial side; and
inserting a combination of the 2 nd core, the bobbin, the plunger, the collar, and the 1 st core into a hollow of the housing from an opening on the other side in the axial direction of the housing.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2018-171140 | 2018-09-13 | ||
| JP2018171140A JP2020043274A (en) | 2018-09-13 | 2018-09-13 | Solenoid, solenoid valve, and assembly method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110894891A true CN110894891A (en) | 2020-03-20 |
| CN110894891B CN110894891B (en) | 2022-04-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910836699.8A Active CN110894891B (en) | 2018-09-13 | 2019-09-05 | Solenoid, solenoid valve and assembly method |
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| Country | Link |
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| JP (1) | JP2020043274A (en) |
| CN (1) | CN110894891B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114566347A (en) * | 2021-12-23 | 2022-05-31 | 中国航空工业集团公司金城南京机电液压工程研究中心 | High-thrust wet electromagnet |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP7338528B2 (en) * | 2020-03-23 | 2023-09-05 | 株式会社デンソー | solenoid valve |
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| CN203784425U (en) * | 2013-01-31 | 2014-08-20 | 日本电产东测有限公司 | Solenoid valve |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN110894891B (en) | 2022-04-22 |
| JP2020043274A (en) | 2020-03-19 |
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