JP2000028024A - Solenoid - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the assembly man-hour, and to improve the assembly workability by respectively providing an unevenness fitting means capable of positioning and fixing a circumferential wall surface part of a cylindrical case member and a circumferential wall surface part of a coil member to be inserted inside thereof on both circumferential wall surface parts to enable the assembly without any caulking process. SOLUTION: In a solenoid, a coil member 3 is stored in a cylindrical case member 2, and the coil member 3 is molded of a resin material as a mold coil MC integrated with an upper plate 6 and a head part 8. A rectangular columnar projection part MCb is provided on a circumferential wall surface part MCa of the mold coil MC. A guide groove GM is formed in a circumferential wall surface part 2c of the case member 2 so that the circumferential wall surface part 2c is notched from an edge part on an opening end part 2b side. The projection part MCb is engaged with the guide groove GM to constitute an unevenness fitting means, the rotational direction is fixed by an axial part GMa of the guide groove GM, and the axial direction is locked by a circumferential part GMb.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a solenoid,
This is a technique relating to a fixing structure of a coil member inserted inside a cylindrical case member.

[0002]

2. Description of the Related Art FIG. 7A is a diagram showing a cross-sectional structure of a solenoid portion 101A of a solenoid valve 101 generally used for controlling various fluids and the like, and FIG. FIG. 2 is a top view of the solenoid valve 101.

[0003] The structure of the solenoid portion 101A will be described with reference to the drawings.
A body 104 into which the center post member 103 is fitted and an upper plate 105 are fixed to both ends of the base member 02, respectively, and the mold coil 106 is disposed between the two members.

[0004] A plunger 108 is slidably accommodated in the axial direction of the mold coil 106 via a sleeve 107 made of a nonmagnetic stainless steel and having a bottomed cylindrical member.

[0005] The molded coil 106 includes a coil 106a.
Is molded integrally so as to cover the periphery of the coil bobbin 106b around which the coil 106b is wound, and the lead wire 106d of the coil 106a extends to the outside via the grommet 106e.

The plunger 108 is engaged with the rod 109, is excited by the molded coil 106, and transmits an axial driving force to the valve portion V100. In the valve section V100, valve means according to a known technique is arranged.

The body 104 is a member having a substantially cylindrical shape. A center post member 103 is fitted on the inner peripheral side, and the inward flange portion 102 of the case 102 is disposed on the outer peripheral side.
a is fitted. An outwardly projecting annular projection 104a is formed at the end on the valve portion V100 side, and a bracket 110 is sandwiched and fixed between the annular projection 104a and the flange 102a.

The bracket 110 includes flanges 110a, 1
10b (see FIG. 7 (b)) and the solenoid valve 1
01 is fastened to the mating housing 150 by bolts or the like.

Reference numeral 111 denotes an O-ring for exerting a sealing property at the joint of the solenoid valve 101.

[0010]

The assembling process of the solenoid portion 101A of the solenoid valve 101 having such a structure is performed by mounting the sleeve 1 on the side of the flange portion 102a of the case 102.
07 and the bracket 110 are fitted and fixed. Then, the molded coil 106 having the upper plate 105 is inserted into the case 102, and the end portion 102b of the case 102 is bent inward while being pressed in the axial direction. The caulking is fixed.

The caulking step is performed by a press machine (many presses have various types and power sources, but manual or mechanical pressurized hydraulic pressure, pneumatic pressure, etc. are generally used). It is necessary to ensure sufficient safety.
Alternatively, it is necessary to introduce an automatic press machine in order to eliminate the press work by the operator.

Also, when caulking and fixing, the lead wire 106
The crimping step is performed by fixing the lead wire 106d so as not to move so that d does not get caught between the upper plate 105 and the jig approaching when bending the end portion 102b or the end portion 102b. Needed.

As described above, when the caulking process is required in the assembling process of the solenoid portion 101A, it is necessary to ensure safety and to fix the lead wire 106d, and it is desired to improve the assembling process and the assembling workability. Was rare.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems of the prior art, and an object of the present invention is to provide a structure capable of assembling without a caulking process, thereby improving the assembling process and assembling workability. It is to provide a solenoid.

[0015]

In order to achieve the above object, according to the present invention, there is provided a solenoid having a coil member inserted inside a cylindrical case member. An uneven fitting means is provided on the peripheral wall portion of the coil member to enable positioning and fixing of both peripheral wall portions.

Thus, when the coil member is inserted inside the case member, the concave / convex fitting means can be engaged to fix the coil member.

The concave-convex fitting means includes a guide groove having an axial portion and a circumferential portion formed on one of the peripheral wall portions of the case member and the coil member, and a guide groove formed on the other peripheral wall portion. It is also preferable that the projection is a projection that enters the guide groove.

Thus, when the coil member is inserted into the inside of the case member, the protrusion is guided in the guide groove, whereby the axial direction portion is fixed in the rotational direction, and the circumferential portion is prevented from coming off in the axial direction. Can do it.

In this case, the fitting between the coil member and the case member is set so that the coil member and the case member are not loosened due to shock or vibration applied during use, aging of components (shrinkage or decrease in elasticity), and the like. However, as long as the protrusion is located in the circumferential direction, it does not come off in the axial direction.

It is also preferable that a detent means is provided on the circumferential portion of the guide groove so as to engage with the projection.

Thus, the coil member can be fixed more reliably. As an example of the rotation preventing means, a configuration in which a gentle inclination is provided in the circumferential direction portion, and a configuration in which the friction pressing force of the protrusion portion with respect to the circumferential direction portion is increased by a wedge effect by rotating the coil member, and a side shape of the circumferential direction portion is It is possible to adopt a configuration in which the protruding portion is bitten as the saw-tooth shape.

It is also preferable that an urging member for urging the coil member in the axial direction is provided, and the projection is pressed against the rotation preventing means.

Thus, the coil member can be more securely fixed. As an example of the urging member, a spring washer or O interposed between the case member and the coil member is used.
An elastic member such as a ring can be employed.

The detent means is an engaging recess formed in a circumferential portion of the guide groove in a direction of urging by the urging member, and the protrusion is engaged with the engaging recess. It is also preferable to provide an engaging convex portion to be formed.

Thus, unless the coil member is moved in the axial direction with a force against the urging force of the urging means, the locked state of the engaging concave portion and the engaging convex portion cannot be eliminated, and the coil can be more reliably prevented. The member can be fixed.

It is also preferable that the detent means is formed by deforming either the guide groove or the projection in the fitted state.

Thus, the deformed portion bites into the other member, and the coil member can be more securely fixed.

[0028]

(Embodiment 1) FIG. 1 is an explanatory sectional view showing a solenoid 1 according to a first embodiment of the present invention.

The solenoid 1 has a cylindrical case member 2, a coil member 3 housed inside the case member 2, and an inner cylindrical portion of the coil member 3 fixed inside one open end 2 a of the case member 2. And a plunger chamber PR located in the inner cylinder of the coil member 3.

In the plunger chamber PR, a plunger 5 accommodated so as to be able to reciprocate in the axial direction is arranged, and an upper plate 6 forms an annular gap with the plunger chamber PR at the other open end 2b of the case member 2. At the same time, the magnetic flux generated by the coil member 3 is guided to the plunger 5.

The plunger chamber PR is surrounded by a sleeve 7 made of a nonmagnetic stainless material having a bottomed cylindrical shape. The sleeve 7 extends between the coil member 3 and the center post member 4 to one open end 2a of the case member 2.

Outside the upper plate 6 (the coil member 3
On the other side, a head portion 8 formed of resin so as to be integrated with the coil member 3 is provided.

The head portion 8 is formed with a shoulder portion 8a and a harness take-out portion 8b projecting from the center portion of the shoulder portion 8a so that the lead wire 3a from the coil member 3 goes out through the grommet 9 to the outside. I have.

Further, a concave groove 8c is formed on the outer periphery of the head portion 8, and an O-ring 13 as a seal member is disposed inside the concave groove 8c.

The plunger 5 is urged in one direction (upward in the figure) by a spring 10 and is connected to a rod 11 for transmitting the axial movement of the plunger.

The rod 11 passes through the inner cylindrical portion of the center post 4 and enables the valve body at the valve portion V to open and close.

On the other hand, a housing H on the other side in which the solenoid 1 is accommodated is provided with a mounting hole Ha into which the head 8 integrated with the case member 2 and the coil 3 enters. An annular groove Hb is formed in the opening of the mounting hole Ha, and the C of the solenoid 1 housed in the mounting hole Ha is
The C-shaped ring 12 is fitted with the shoulder 8a.
To secure (prevent from falling off) in the axial direction.

The inner diameter of the mounting hole Ha and the outer diameter of the head portion 8 are set to fit so that they can exhibit sealing performance when they are fitted and can be easily removed. I have. The O-ring 13 is provided for the purpose of assisting the sealing of the head portion 8.

The bottom of the mounting hole Ha is provided with a concave groove 8d and an O-ring 14 provided on the outer periphery of the one open end 2a of the case member 2 to prevent fluid from entering from the valve portion V.

Next, the characteristic structure of the solenoid 1 will be described with reference to FIG. FIG. 2 is a view showing a state at the time of assembling a molded coil MC as a coil member in which the case member 2, the coil member 3, the upper plate 6, the head portion 8 and the like are molded and integrated with a resin material.

The molded coil MC has a peripheral wall portion M
A substantially rectangular columnar protrusion MCb is formed so as to protrude from Ca.

On the other hand, a guide groove GM is formed in the peripheral wall portion 2c of the case member 2 so as to cut out the peripheral wall portion 2c from the edge on the side of the opening end 2b. The guide groove GM in this embodiment includes an axial portion GMa extending in the axial direction from the edge on the side of the opening end 2b and a circumferential portion GMb extending in the circumferential direction from the end of the axial portion GMa. ing.

Then, when assembling the mold coil MC and the case member 2, the protrusion MCb is guided into the guide groove GM to insert the mold coil MC.

In the assembly, the protrusion MCb is aligned with the guide groove GM, the molded coil MC is inserted in the direction of arrow A1, and when the protrusion MCb hits the circumferential portion GMb, it is rotated in the circumferential direction of arrow A2.

The projection MCb and the guide groove GM mesh with each other to function as a concave-convex fitting means, whereby the axial portion GMa is fixed in the rotational direction, and the circumferential portion GMb is prevented from coming off in the axial direction. Can be.

In this case, the fitting between the molded coil MC and the case member 2 is set so as not to be loosened due to shock or vibration applied during use, aging of components (shrinkage or decrease in elasticity), and the like. By doing so, the circumferential portion GMb
As long as the protruding portion is locked, the shaft does not come off in the axial direction.

The molded coil MC and the case member 2
If disassembly after assembly is not taken into consideration, it is also possible to apply an adhesive or the like to the peripheral wall portion MCa or the peripheral wall portion 2c to perform a firm fixing.

Further, when the protrusion MCb and the guide groove GM are made of a thermoplastic resin material, the protrusion M
By deforming the Cb or the guide groove GM by heat or the like, the deformed portion can bite into the other member and fix the molded coil MC.

Therefore, by using the solenoid 1 having such a structure, it is possible to assemble the mold coil MC and the case member 2 without a caulking step.
The assembly process and assembly workability can be improved.

Although the solenoid 1 according to this embodiment has been described as being used for a solenoid valve, the present invention is not limited to this usage mode, and can be used as a component incorporated in a drive unit of other various devices. It is.

The method of mounting the solenoid 1 and the housing H is not limited to the mounting hole Ha and the C-shaped ring 12;
Other configurations, such as a configuration having a screw on itself, can also be employed.

Further, the guide groove GM can be formed by a recess which is not notched but is not opened by press molding or molding. In this case, the strength of the case member 2 can be maintained. It is.

(Embodiment 2) FIG. 3 is an explanatory sectional view showing a solenoid 21 according to a second embodiment of the present invention.

In the solenoid 21, the same components as those of the solenoid 1 of the first embodiment are denoted by the same reference numerals.

One of the characteristic features of the second embodiment is that a spring washer 2 is used as an urging member for urging the molded coil MC against the case member 22 in the axial direction.
3 is provided.

In order to generate an urging force by the spring washer 23, the case member 2 of the molded coil MC2 is
An annular gap GP is provided between the case member 22 and the inner end surface 22a1 of the open end 22a of the case member 22, and a spring washer 23 is disposed in the annular gap GP.

FIG. 4 shows the case member 22 and the molded coil M.
It is a figure which shows the state at the time of assembly of C2. According to this figure,
The characteristic configuration of the case member 22 and the molded coil MC2 will be described.

Regarding the molded coil MC2, the configuration of the coil member 3, the upper plate 6, and the head portion 8 is the same, but the protrusion MC2 protruding from the peripheral wall portion MC2a.
An engagement protrusion MC2c protruding in the biasing direction by the spring washer 23 is formed integrally with the spring b.

The case member 22 is formed with an engagement recess GMc into which the engagement protrusion MC2c is fitted, on the side of the circumferential portion GMb of the guide groove GM in the direction of urging by the spring washer 23, and the mold coil MC2 and the case member 22 are formed. At the time of assembling, the protrusion MC2b is guided in the guide groove GM to insert the molded coil MC2.

In assembling, the position of the protrusion MC2b is aligned with the position of the guide groove GM, and the molded coil MC2 is connected to the protrusion MC2b.
Is inserted in the direction of arrow A <b> 1 so as to push until it hits the circumferential portion GMb. And keep that state, arrow A
2 in the circumferential direction.

When the protrusion MC2b is in contact with the circumferential portion GMb, the spring washer 23 is compressed in the axial direction to exert a biasing force.

Then, the engaging convex portion MC2c is connected to the engaging concave portion GM.
When the pushing force in the direction of the arrow A1 is released at the position opposing to the position c, the molding coil MC2 moves in the direction of the arrow A3 due to the urging force of the spring washer 23, and the engaging convex portion MC2c and the engaging concave portion GMc engage. , Functions as a detent means.

As a result, it is possible to eliminate the locked state between the engaging convex portion MC2c and the engaging concave portion GMc unless the molded coil MC2 is moved in the axial direction (downward) with a force against the urging force of the spring washer 23. Therefore, the molded coil MC2 can be more reliably fixed.

FIG. 5 shows a configuration of a solenoid 21A which employs an O-ring 24 as a biasing means instead of the spring washer 23 of FIG. By utilizing the elastic repulsive force of the O-ring 24 having the sealing property as described above, it is possible to exert two functions of urging the molded coil MC2 and preventing fluid leakage from the valve V side.

The other structure of the solenoid 21A is the same as that of the solenoid 21.

(Other Embodiments) FIG.
(B) is a diagram showing a state when assembling the case members of the solenoids 31, 41 and the molded coil in another embodiment to which the present invention is applied. The solenoids 31 and 41 will be described with reference to FIG.

In the solenoid 31 shown in FIG.
The protrusion MC3b of the molded coil MC3 protrudes in a cylindrical shape, and the guide groove GM3 of the case member 32 is provided with a gentle slope in the circumferential direction part GM3b as a detent means.
By rotating the molded coil MC3 at the time of insertion, a frictional welding force against the protrusion MC3b is increased by a wedge effect.

The angle of inclination of the circumferential portion GM3b can be determined according to the required friction welding force.
At the end of the circumferential portion GM3b, a circular concave portion into which the protrusion MC3b enters may be provided.

In the solenoid 41 shown in FIG.
A saw-like meshing portion is provided above the protrusion MC4b of the molded coil MC4, and a guide groove GM4 of the case member 42 is provided.
Is provided on the upper side surface of the circumferential portion GM4b.

Accordingly, the mold coil MC4 can be more firmly fixed by the engagement of the saw-shaped engagement portions.

[0071]

According to the present invention described above, the case member and the coil member can be assembled without a caulking step, and a solenoid having improved assembling steps and assembling workability is provided. can get.

When the coil member is inserted into the inside of the case member, the protrusion is guided by the guide groove, so that the rotational direction can be fixed in the axial direction. It is possible to prevent the circumferential portion from coming off in the axial direction. By providing the rotation preventing means, the coil member can be more reliably fixed.

By providing an urging member for urging the coil member in the axial direction, the coil member can be more securely fixed.

Furthermore, by providing the guide groove and the projection with an engagement recess and an engagement protrusion, the engagement with the engagement recess is performed unless the coil member is moved in the axial direction by a force against the urging force of the urging means. The locked state of the projection cannot be eliminated, and the coil member can be more securely fixed.

Further, by forming the rotation preventing means by deforming either the guide groove or the protrusion in the fitted state, the deformed portion bites into the other member, and the coil member can be more securely fixed. Can be.

[Brief description of the drawings]

FIG. 1 is a sectional configuration explanatory view of a solenoid according to a first embodiment of the present invention.

FIG. 2 is a view showing a state when the case member and the coil member of the solenoid according to the first embodiment of the present invention are assembled.

FIG. 3 is an explanatory sectional view of a solenoid according to a second embodiment of the present invention.

FIG. 4 is a view showing a state when assembling a case member and a coil member of a solenoid according to a second embodiment of the present invention.

FIG. 5 is an explanatory sectional view of a solenoid provided with another urging member according to a second embodiment of the present invention.

FIGS. 6 (a) and 6 (b) are views showing a state when assembling a case member and a coil member of a solenoid according to another embodiment of the present invention.

FIG. 7 is a diagram of a conventional solenoid valve.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Solenoid 2 Case member 2a, 2b Open end part 2c Peripheral wall part 3 Coil member 4 Center post member 5 Plunger 6 Upper plate 7 Sleeve 8 Head part 8a Shoulder part 8b Harness take-out part 8c Groove 9 Grommet 10 Spring 11 Rod 12C Shaped ring 13, 14 O-ring 23 Spring washer GM Guide groove GMa Axial portion GMb Circumferential portion GP Annular gap H Housing Ha Mounting hole Hb Annular groove MC Mold coil (coil member) MCa Peripheral wall portion MCb Projection PR Plunger chamber V valve section

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Noriyoshi Uemura 4-3-1 Tsujido Shinmachi, Fujisawa City, Kanagawa Prefecture Inside NOK Co., Ltd. (72) Inventor Hideki Todoen 4-3-3 Tsujido Shinmachi, Fujisawa City, Kanagawa Prefecture No. 1 Inside NOK Co., Ltd. (72) Inventor Takaki Watanabe 4-3-1 Tsujido Shinmachi, Fujisawa-shi, Kanagawa Prefecture No. 3 Inside NOK Co., Ltd. (72) Inventor Kazuya Kimura 2-1-1 Toyotamachi, Kariya-shi, Aichi Prefecture Inside Toyota Industries Corporation (72) Inventor Kazuhiko Minami 2-1-1 Toyota-cho, Kariya City, Aichi Prefecture Inside Toyota Industries Corporation (72) Inventor Hiroshi Taeyama 2-1-1 Toyota-machi, Kariya City, Aichi Prefecture Toyota Corporation Inside the Automatic Loom Works (72) Inventor Mahiro Kawaguchi 2-1-1 Toyota-cho, Kariya-shi, Aichi Pref. House F-term (reference) 3H106 DA23 DB02 DB12 DB22 DB32 DD09 EE35 EE48 GA01 GA08 GA30 JJ02 5E048 AD03 CB07

Claims (6)

[Claims] 1. A solenoid having a coil member inserted inside a cylindrical case member, wherein both peripheral wall portions can be positioned and fixed to a peripheral wall portion of the case member and a peripheral wall portion of the coil member. A solenoid comprising a concave-convex fitting means. And a guide groove having an axial portion and a circumferential portion formed on one of the peripheral wall portions of the case member and the coil member, and a guide groove formed on the other peripheral wall portion. 2. The solenoid according to claim 1, wherein the projection is a projection that enters the guide groove. 3. The solenoid according to claim 2, further comprising a detent means provided on the circumferential portion of the guide groove so as to engage with the projection. 4. The solenoid according to claim 3, further comprising an urging member for urging the coil member in the axial direction, wherein the protrusion is pressed against the detent means. 5. The detent means is an engaging recess formed on a side of a circumferential portion of the guide groove in an urging direction by the urging member, and the projection is engaged with the engaging recess. The solenoid according to claim 4, further comprising an engaging projection formed. 6. The device according to claim 3, wherein the detent means is formed by deforming one of the guide groove and the projection in the fitted state. solenoid.