JPH11248022A - Solenoid yoke - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve an assembling property and reliability and to easily connect and disconnect all parts by providing a roughly snap retainer type guide clamping groove on one piece of a yoke and providing at least one slit on the yoke toward the other piece of the yoke from the groove. SOLUTION: A solenoid yoke is provided with a guide groove to make it easy to externally fit one piece 42 of the yoke on an outer surface cut-out part 14 (to make it easy to easily guide a guide cylinder 13 to a roughly central round hole part from an opening part of a groove end surface) as a roughly snap retainer type guide cylinder clamping groove and at least one slit on the yoke toward the other piece 43 through a roughly central part of the yoke from the groove. Especially, it is needless to provide a slit to the other piece 43, and it is enough to provide the slit on the one piece 42 or to an optional position from the one piece 42 until a snap function is secured. Consequently, it is possible to improve an assembling property and reliability and to easily connect and disconnect all parts as a recycling countermeasure.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a direct acting two-port solenoid valve which is installed in a flow path of a fluid such as air, and opens and closes a valve seat with a seat seat fixed to a movable iron core. The present invention relates to a solenoid yoke with improved assemblability and reliability, as well as improved measures for recycling, which can be easily attached and detached.

[0002]

2. Description of the Related Art Conventionally, a seat made of a soft elastic member (for example, silicone rubber) is fixed to an inner peripheral portion of a guide cylinder of a two-port valve body of a resin molded member (for example, polypropylene resin) having a valve seat. The movable core of the magnetic member (also called an adsorption core, armature, plunger), a compression coil spring (for example, stainless steel wire) that constantly urges the movable core, and a watertight packing (for example, an O-ring) (A normal closed type uses a fixed core, but a fixed core and / or a component other than the fixed core may be used in order to change to a normally open type.) , A rubber damper), and a solenoid in which a copper wire (for example, an enamel wire) is wound around a cylindrical bobbin and connected to a terminal piece is attached to the outer peripheral portion of the guide cylinder of the two-port valve body. Substantially U-shaped solenoid yoke 60 having an inner cylindrical clamping groove 61 the piece of (see FIG. 6) 2
The fixed iron core and the solenoid are also fixed by externally fitting to the cutout portion on the outer surface of the guide cylinder of the port valve body, and a direct acting 2-port solenoid valve (normally open type, normally closed type) that does not use an assembly screw.
Is known.

[0003]

However, in the conventional substantially U-shaped guide cylinder holding groove 61, a substantially U-shaped solenoid yoke 60 is cut from the cutout on the outer surface of the guide cylinder of the two-port valve body due to vibration or the like. There is a problem of reliability that the device easily comes off. Also, the entrance of the groove 61 is tapered,
A method of slightly increasing the joined circumferential portion is also practiced, but assemblability is deteriorated, and abrasion is generated at the cutout on the outer surface of the guide cylinder of the 2-port valve body due to vibration or the like, which may cause a crack. In addition, there is a problem of reliability that a gap is generated and the gap is easily removed.

[0004] The present invention has been made in view of such problems of the prior art, and has as its object to improve the assemblability and reliability as well as to reduce all parts as a measure for recycling. An object of the present invention is to provide a solenoid yoke for a direct acting two-port solenoid valve which can be easily attached and detached.

[0005]

In order to achieve the above object, a solenoid yoke according to the present invention has a substantially U-shaped solenoid yoke provided with a substantially snap-retainer-like guide tube clamping groove on one piece thereof, and further comprising a groove formed from the groove. The yoke is provided with at least one slit toward the other piece of the yoke.
Alternatively, a substantially U-shaped solenoid yoke is provided with a substantially snap-retainer-like guide tube holding groove in one piece, and at least one slit is provided in the one piece in a circumferential direction from the groove. . Alternatively, an approximately U-shaped solenoid yoke is provided with a substantially snap-retainer-like guide cylinder holding groove in one piece, and an English-shaped slit is provided in the one piece in a circumferential direction from the groove.

[0006]

Embodiments of the present invention will be described with reference to the drawings. FIG. 1 shows a solenoid yoke 4 according to the present invention.
FIG. 2 is a perspective view of the solenoid valve 10 in which 0 is used. FIG. 2 is a sectional view of the solenoid valve 10. Inflow section 11 and outflow section 1
2, a guide tube 13, an outer cutout portion 14 provided on the outer surface of the guide tube 13 on the outflow portion 12 side, and a flange portion provided on the end surface side of the guide tube 13 near the outer cutout portion 14. The two-port valve body 16 having the valve member 23 and the valve seat 15 is integrally formed of a resin molded member. A movable iron core 18 to which a seat 17 for seating on the valve seat 15 is fixed;
A fixed iron core 21 is inserted as a fixed member having a compression coil spring 19 and watertight packings 20 mounted on the outer periphery. Here, in order to facilitate attachment and detachment of the fixed core 21, a step (stopper) may be provided on the inner peripheral portion of the guide tube 13 to such an extent that the fixed core 21 protrudes slightly from the end face of the guide tube 13. . That is, when the fixed iron core 21 is fixed by the substantially U-shaped solenoid yoke 40 described later, a gap is formed such that the end surface of the guide cylinder 13 does not contact the other piece 43 of the yoke 40. A solenoid 30 connected to a terminal piece 33 by winding a copper wire 31 called a magnet wire around a cylindrical bobbin 32 is attached to the outer peripheral portion of the guide tube 13 (it can be inserted up to the flange portion 23), The fixed iron core 21 and the solenoid 30 are fitted by fitting a piece 42 of the yoke 40 having a substantially snap-retainer-like guide cylinder holding groove 41 and a slit 44 into the outer surface cutout portion 14.
Are also fixed to form the solenoid valve 10. Here, the yoke 40
Is connected to the flange 23 and the fixed iron core 21, so that the solenoid 30 can slightly rotate. That is, an excessive stress (for example, a pull of an electric wire or the like expected when the solenoid valve 10 is incorporated in a product) is applied to the terminal piece 33.
, The obstacle such as breakage due to the rotation can be prevented. The solenoid valve 10 opens and closes the valve seat 15 with a seat 17 fixed to the movable iron core 18 by applying a low DC voltage to the terminal piece 33 to attract the movable iron core 18. However, if necessary, if a rubber damper 22 or the like is inserted between the fixed iron core 21 and the movable iron core 18, the impact noise at the time of suction is reduced.

As described above, the embodiment of the present invention has been described by using the normally-closed direct-acting two-port solenoid valve. Guide tube 1
3 The components to be inserted into the inner peripheral portion may be slightly changed.

FIG. 3 is a perspective view of a solenoid yoke 40 according to a first embodiment of the present invention. FIG. 4 is a perspective view of a solenoid yoke 47 according to a second embodiment of the present invention. FIG. 5 is a perspective view of a solenoid yoke 50 according to a third embodiment of the present invention. The solenoid yoke 40 according to the first embodiment of the present invention makes it easy to fit the piece 42 of the yoke 40 into the outer cutout portion 14 (the guide tube 13 is substantially rounded from the opening at the end face of the groove 41). In order to easily guide the hole into the hole, a substantially snap retainer (also referred to as a Daruma pin) guide tube holding groove (or
A substantially C-ring-shaped guide tube holding groove may be used) 41,
Further, in order to add a snap function (elastic expansion and contraction so as to make a clicking sound), the yoke 40 extends from the groove 41 through the substantially central portion of the yoke 40 toward the other piece 43. Provided with at least one slit 44. In particular, it is not necessary to provide the slit 44 up to the other piece 43, and the slit 44 may be inserted from the one piece 42 or from the one piece 42 to an arbitrary position until the snap function can be secured. As the solenoid yoke 47 of the second embodiment,
A plurality (even one) of slits 46 are provided in the one piece 45 in the circumferential direction from the groove 41 provided in the one piece 45 of the substantially U-shaped solenoid yoke. As the solenoid yoke 50 of the third embodiment, the groove 41 provided in one piece 48 of the solenoid yoke having a substantially U-shape is used.
A T-shaped slit 49 is provided in the piece 48 in the circumferential direction from. The slit 49 is, in particular, T
Not limited to the letter shape, if it is an English letter, it is I letter, Y letter, E letter, W letter, V letter, H letter, L letter, Z letter, X letter, C letter , N-shape, M-shape or the like.

In order to fix or attach the solenoid valve 10 to other parts or the like, the yoke 40 may be provided with a mounting hole, a projection or the like, or an outflow portion may be provided with an arm or the like. To prevent the solenoid 30 from turning extremely, the solenoid 30 is provided with a rotation preventing projection or the like, and the flange portion 23 and / or the yoke 4
The other piece 43 of 0 may be provided with a groove or the like.

As described above, various combinations and the like of the preferred embodiments of the present invention have been described. However, the present invention is not limited to the above-described embodiments, and a number of combinations are possible without departing from the spirit of the invention. Needless to say, combinations, modifications and the like can be made.

[0011]

According to the solenoid yoke of the present invention,
As well as the improvement of the assemblability and reliability, there is an effect that all parts can be easily attached and detached as a recycle measure. or,
The effect of the slit, which has been conventionally confirmed, is also exhibited, such as improved heat radiation (cooling) and reduced eddy current.

[Brief description of the drawings]

FIG. 1 is a perspective view of an electromagnetic valve in which a solenoid yoke of the present invention is used.

FIG. 2 is a sectional view of an electromagnetic valve in which the solenoid yoke of the present invention is used.

FIG. 3 is a perspective view of a solenoid yoke according to the first embodiment of the present invention.

FIG. 4 is a perspective view of a solenoid yoke according to a second embodiment of the present invention.

FIG. 5 is a perspective view of a solenoid yoke according to a third embodiment of the present invention.

FIG. 6 is a perspective view of a conventional solenoid yoke.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 10 ... Solenoid valve, 11 ... Inflow part, 12 ... Outflow part, 13 ... Guide cylinder, 14 ... Outer cutout part, 15 ... Valve seat, 16 ... Valve body,
17: seating seat, 18: movable core, 19: compression coil spring, 20: watertight packing, 21: fixed core,
22: rubber damper, 23: flange, 30: solenoid,
31: copper wire, 32: bobbin, 33: terminal piece, 40: substantially U-shaped solenoid yoke, 41: substantially snap retainer-like guide tube holding groove, 42, 45 and 48: one yoke, 43
... Yoke other pieces, 44, 46 and 49 ... Slits, 47 and 50 ... Solenoid yokes of other embodiments

Claims (3)

[Claims] An inner peripheral portion of a guide cylinder of a two-port valve body having a valve seat includes a movable iron core to which a seating seat is fixed, a compression coil spring, a fixed member having watertight packings mounted on an outer peripheral portion, and the like. The solenoid is mounted on the outer periphery of the guide cylinder of the two-port valve main body, and one part of the substantially U-shaped solenoid yoke is externally fitted to the cutout of the outer surface of the guide cylinder of the two-port valve main body to fix the solenoid. In a direct acting two-port solenoid valve to which an iron core and the solenoid are also fixed, a substantially snap-retainer-like guide cylinder holding groove is provided in the one piece of the yoke, and further from the groove toward the other piece of the yoke. A substantially U-shaped solenoid yoke, wherein the yoke is provided with at least one slit. 2. A movable member to which a seating seat is fixed, a compression coil spring, and a fixing member having watertight packing mounted on an outer peripheral portion thereof are provided on an inner peripheral portion of a guide cylinder of a two-port valve body having a valve seat. The solenoid is mounted on the outer periphery of the guide cylinder of the two-port valve main body, and one part of the substantially U-shaped solenoid yoke is externally fitted to the cutout of the outer surface of the guide cylinder of the two-port valve main body to fix the solenoid. In a direct-acting two-port solenoid valve to which an iron core and the solenoid are also fixed, a substantially snap-retainer-like guide cylinder holding groove is provided in the one piece of the yoke, and the one piece is formed in a circumferential direction from the groove. A substantially U-shaped solenoid yoke having at least one slit provided therein. 3. A movable member to which a seating seat is fixed, a compression coil spring, and a fixing member having watertight packing mounted on an outer peripheral portion thereof are provided on an inner peripheral portion of a guide cylinder of a two-port valve body having a valve seat. The solenoid is mounted on the outer periphery of the guide cylinder of the two-port valve main body, and one part of the substantially U-shaped solenoid yoke is externally fitted to the cutout of the outer surface of the guide cylinder of the two-port valve main body to fix the solenoid. In a direct-acting two-port solenoid valve to which an iron core and the solenoid are also fixed, a substantially snap-retainer-like guide cylinder holding groove is provided in the one piece of the yoke, and the one piece is formed in a circumferential direction from the groove. An approximately U-shaped solenoid yoke, wherein an alphabetical slit is provided therein.