JPH0557553U - Electromagnetic actuator - Google Patents

Abstract

(57) [Abstract] [Objective] A cylindrical coil assembly including a coil in which a movable core is housed in a working chamber formed between first and second magnetic bodies and which can generate a magnetic force for operating the movable core. Is disposed between both magnetic bodies, and a magnetic cylinder that is continuous with the second magnetic body and surrounds the coil assembly is fixed to the first magnetic body, and a grommet having a through hole for drawing out a lead wire connected to the coil is provided. In the electromagnetic actuator fitted to the magnetic cylinder or the first magnetic body, the coil assembly can be prevented from rattling with a small number of parts. [Structure] The grommet 38 is formed of an elastic material having an interposition portion 44 interposed between the first magnetic body 6 and the coil assembly A _C.

Description

[Detailed description of the device]

[0001]

[Industrial application]

 According to the present invention, a movable core is housed in a working chamber formed between a first magnetic body and a second magnetic body, and a cylindrical coil assembly including a coil capable of generating a magnetic force for operating the movable core is provided between the magnetic bodies. A magnetic cylinder which is connected to the second magnetic body and surrounds the coil assembly, is fixed to the first magnetic body, and a grommet having a through hole for pulling out the lead wire connected to the coil is the magnetic cylinder or the first magnetic body. The present invention relates to an electromagnetic actuation device fitted to a magnetic body.

[0002]

[Prior Art]

 Conventionally, in such a device, a coil assembly disposed between the first and second magnetic bodies is provided between one of the magnetic bodies and the coil assembly in order to avoid rattling between the magnetic bodies. An O-ring and a wave washer are interposed.

[0003]

[Problems to be solved by the device]

 In the above-mentioned conventional one, an O-ring or a wave washer for preventing rattling of the coil assembly is required, and the number of parts is large.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an electromagnetic operating device capable of preventing rattling of a coil assembly with a small number of parts.

[0005]

[Means for Solving the Problems]

 To achieve the above object, according to a first feature of the present invention, a movable core is housed in a working chamber formed between the first and second magnetic bodies, and a magnetic force for operating the movable core is generated. A cylindrical coil assembly having a possible coil is arranged between both magnetic bodies, and a magnetic cylinder that is continuous with the second magnetic body and surrounds the coil assembly is fixed to the first magnetic body and is continuous with the coil. In an electromagnetic actuator in which a grommet having a through hole for pulling out a lead wire is fitted in a magnetic cylinder, the grommet has an interposition part interposed between the first magnetic body and the coil assembly. And is made of an elastic material.

According to a second aspect of the present invention, a movable core is housed in an operation chamber formed between the first and second magnetic bodies, and a coil capable of generating a magnetic force for operating the movable core is provided. A cylindrical coil assembly is arranged between both magnetic bodies, and a magnetic cylindrical body that surrounds the coil assembly is connected to the second magnetic body, is fixed to the first magnetic body, and the lead wire connected to the coil is pulled out to the outside. In an electromagnetic actuator in which a grommet having a through hole for fitting is fitted to the first magnetic body, the grommet is formed of an elastic material having an interposition part interposed between the first magnetic body and the coil assembly. It

[0007]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings.

1 to 5 show an embodiment of the present invention. FIG. 1 is a vertical cross-sectional view of an electromagnetic switching valve to which the present invention is applied, and FIG. 2 is an enlarged view of part 2 of FIG. 3 is a perspective view of the grommet, FIG. 4 is a view taken in the direction of arrow 4 in FIG. 1, and FIG. 5 is a sectional view taken along line 5-5 of FIG.

First, in FIG. 1, the solenoid operated directional control valve V comprises a valve operating unit 3 and an electromagnetic operating device 1 assembled therein.

In the electromagnetic actuator 1, the inner housing H _I is composed of a yoke 6 as a first magnetic body and a fixed core 7 as a second magnetic body fitted and connected to both ends of a non-magnetic cylindrical body 9. The outer housing H _O has one end engaged with the fixed core 7 and the other end of the magnetic cylindrical body 8 caulked to the yoke 6.

The yoke 6 has a sliding hole 12 which is open at the end face of the inwardly projecting portion 10 and faces the inwardly projecting portion 11 of the fixed core 7. fitted to both ends of the non-magnetic cylindrical member 9 is configured that the inner housing H _I, the working chamber R formed on the inner Pillow in grayed H _I, slidably fitted in the slide hole 12 The movable core 13 is accommodated. Further, one end side of the rod 14 whose middle portion is fixed to the movable core 13 movably penetrates the fixed core 7 and is slidably supported by a sliding bearing 16 mounted on the fixed core 7, so that the rod 14 The other end of is supported slidably on the yoke 6 via a sliding bearing 15.

The yoke 6 and the fixed core 7 are integrally provided with flange portions 6 a and 7 a that project outward in the radial direction, and between the flange portions 6 a and 7 a, the inner housing H _I of the inner housing H _I is provided. A coil assembly A _C surrounding the non-magnetic cylinder 9 is arranged. The coil assembly A _C comprises a coil 36 wound around a bobbin 35 surrounding the non-magnetic cylinder 9 and covered with a mold part 37 made of synthetic resin, and is formed in a cylindrical shape.

With reference to FIG. 2 and FIG. 3 together, one end of the magnetic cylindrical body 8 is engaged with the outer edge of the flange portion 7 a of the fixed core 7. A thin portion 8b is provided at the other end of the magnetic cylinder 8 via a step portion 8a that engages with the outer edge of the collar portion 6a of the yoke 6, and the thin portion 8b is caulked to the outer edge of the collar portion 6a. outer housing H _O is constructed by binding.

In the magnetic cylinder 8, an opening 38 is provided on the side of the yoke 6 a of the yoke 6, and through holes 41, 42 for drawing out a pair of lead wires 39, 40 connected to the coil 36 to the outside. The grommet 43 having is fitted into the opening 38. Moreover, the grommet 43 is made of an elastic material such as rubber, and the ring-shaped interposition part 44 interposed between the flange 6a and the coil assembly A _C is integrally connected to the grommet 43. A notch 45 into which the interposition part 44 is fitted is provided at the outer edge of the end of the coil part A _{C on} the flange part 6a side of the coil assembly A _C.

Further, as shown in FIG. 4 and FIG. 5, recesses 46 are provided on the outer peripheral portion of the outer surface of the collar portion 6a of the yoke 6 at a plurality of positions spaced in the circumferential direction. When the thin portion 8b of 8 is swaged to the outer edge of the collar portion 6a, a part of the thin portion 8b is engaged with these recesses 46, whereby the yoke 6 and the magnetic cylindrical body 8 are The circumferential relative position is determined.

Referring again to FIG. 1, the valve housing 17 of the valve actuating unit 3 has a stepped hole 18 opening at one end face, and a large diameter portion 19 of the stepped hole 18 is provided with a magnetic field in the electromagnetic actuator 2. One end of the cylindrical body 5 is screwed, the outwardly projecting portion 21 of the fixed core 7 is fitted to the middle diameter portion 20, and the one end portion of the rod 14 is located at the small diameter portion 22.

Further, the valve housing 17 has a slide hole 23 having one end communicating with the small diameter portion 22 and a working fluid flow chamber 24 having one end communicating with the other end of the slide hole 23. It is provided on the same axis as the stepped hole 18. The rod-shaped main body portion 26 of the valve body 25 is slidably fitted in the sliding hole 23, and a large-diameter stopper 27 connected to the main body portion 26 is arranged in the flow chamber 24. .. A spring 28 is contracted between the outer end surface of the stopper 27 and one inner end surface of the circulation chamber 24 facing the stopper 27, and the elastic force of the spring 28 causes the inner end surface of the stopper 27 to face the circulation chamber. The valve body 25 comes into contact with one end of the rod 14 while coming into contact with the other inner end surface of 24.

The valve housing 17 has one end opening into the sliding hole 23 and the other end leading to the working fluid supply source, and the introduction path 29, and one end opening into the sliding hole 23 and the other end. A discharge passage 30 that communicates with the fluid reservoir and a flow passage 31 that has one end communicating with the flow chamber 24 and the other end communicating with a control device (not shown) are provided. Further, the valve body 25 has a flow passage 32, one end of which communicates with one of the introduction passage 29 and the discharge passage 30, and the other end of which communicates with the circulation chamber 24 at all times.

In such an electromagnetic switching valve V, when the coil 36 of the coil assembly A _C is demagnetized, the valve body 25 is moved toward the electromagnetic actuator 1 side by the elastic force of the spring 28 as shown in FIG. It is retracted, and the flow passage 32 of the valve body 25 communicates with the outlet passage 30.

When the coil 36 is excited, the movable core 13 is attracted to the fixed core 7 side against the elastic force of the spring 28, and the rod 14 moves the valve body 25 forward. Of the flow passage 32 communicates with the introduction passage 29.

Next, the operation of this embodiment will be described. Since the coil assembly A _C is interposed between the collar portion 6 a of the yoke 6 and the collar portion 7 a of the fixed core 7 via the interposition portion 44. by exerting the intervening portion 44 resiliently force made of an elastic material, the coil assembly a _C is prevented from rattling between Ryotsuba portion 6a, 7a. Moreover, the interposition part 44 is connected to the grommet 43 for pulling out the lead wires 39, 40 to the outside, so that no special parts such as an O-ring and a wave washer for preventing rattling are required. This can contribute to a reduction in the number of parts.

The intervening portion 44 is fitted to the outer edge of the end portion of the coil assembly A _{C on} the side of the flange portion 6a, and is in close contact with the inner surface of the caulking joint portion of the outer housing H _O. The adhesive tape that was conventionally wrapped around the outer surface of the caulking joint to prevent water from entering from the outside is unnecessary, which further reduces the number of parts and eliminates the need for tape winding work, which improves the assembly work efficiency. improves.

FIGS. 6 and 7 show a second embodiment of the present invention, in which parts corresponding to those of the first embodiment are designated by the same reference numerals.

In the collar portion 6 a of the yoke 6 in the outer housing H _O , a short columnar shape having a pair of through holes 48, 49 for drawing out the lead wires 39, 40 connected to the coil 36 of the coil assembly A _C is formed. An opening 50 for fitting the grommet 46 is provided. Is duck grommet 46 is what is formed of an elastic material, the grommet 4 6, disk-shaped intermediate portion 47 which is caused to intervene between the flange portion 6a and the coil assembly A _C is continuously provided.

According to this second embodiment, by exerting a flange portion 6a and the intervening portion 47 resiliently forces interposed between the flange portion 7a of the fixed core 7 of the yoke 6, the coil assembly A _C is It is possible to avoid rattling between the flange portions 6a and 7a, and to eliminate the need for dedicated parts such as an O-ring and a wave washer just for preventing rattling, which contributes to a reduction in the number of parts.

FIG. 8 shows a third embodiment of the present invention, in which a grommet 46 fitted in the opening 50 of the collar 6a is interposed between the collar 6a and the coil assembly A _C. The interposition part 51 is continuously provided.

Even in this case, the same effect as that of the second embodiment can be obtained.

In each of the above embodiments, the yoke 6 is the first magnetic body and the fixed core 7 is the second magnetic body, but the reverse is also possible.

Further, the magnetic cylinder may be integrally connected to the second magnetic body, or the magnetic cylinder may be fixed to the first magnetic body by a fixing structure other than caulking.

[0030]

[Effect of the device]

 As described above, according to the first aspect of the present invention, the movable core is housed in the working chamber formed between the first and second magnetic bodies, and the movable core is provided with a coil capable of generating a magnetic force for operating the movable core. A cylindrical coil assembly is arranged between the two magnetic bodies, a magnetic cylinder that is continuous with the second magnetic body and surrounds the coil assembly is fixed to the first magnetic body, and a lead wire that is continuous with the coil is drawn to the outside. In an electromagnetic actuating device in which a grommet having a through hole for fitting is fitted in a magnetic cylinder, the grommet is formed of an elastic material having an interposition part interposed between the first magnetic body and the coil assembly. Therefore, the coil assembly can be prevented from rattling between both flanges by making the interposition part connected to the grommet for pulling out the lead wire to the outside exert elastic force and prevent rattling. Only O-ring Dedicated components such as a wave washer is not required, which can contribute to the number of parts reduced.

According to the second aspect of the present invention, the movable core is housed in the working chamber formed between the first and second magnetic bodies, and the coil is provided to generate a magnetic force for operating the movable core. A cylindrical coil assembly is arranged between both magnetic bodies, and a magnetic cylindrical body that surrounds the coil assembly is connected to the second magnetic body, is fixed to the first magnetic body, and the lead wire connected to the coil is pulled out to the outside. In an electromagnetic actuator in which a grommet having a through hole for fitting is fitted to the first magnetic body, the grommet is formed of an elastic material having an interposition part interposed between the first magnetic body and the coil assembly. Therefore, the coil assembly can be prevented from rattling between the collar parts by making the interposition part connected to the grommet for pulling out the lead wire exert an elastic force, and prevent rattling. O just for No special parts such as rings and wave washers are required, which contributes to a reduction in the number of parts.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of an electromagnetic switching valve according to a first embodiment.

FIG. 2 is an enlarged view of part 2 of FIG.

FIG. 3 is a perspective view of a grommet and an interposition part.

FIG. 4 is a view on arrow 4 of FIG.

5 is a sectional view taken along line 5-5 of FIG.

FIG. 6 is a sectional view corresponding to FIG. 1 of the second embodiment.

FIG. 7 is a perspective view of a grommet and an interposition part of the second embodiment.

FIG. 8 is a perspective view of a grommet and an interposition part of the third embodiment.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Electromagnetic actuator 6 ... Yoke as a 1st magnetic body 7 ... Fixed core as a 2nd magnetic body 8 ... Magnetic cylinder 36 ... Coil 38,46 ... Grommet 39 , 40 ... lead wire 41,42,48,49 ... hole 44,47,51 ... interposed section A _C ... coil assembly R ... working chamber

Claims (2)

[Scope of utility model registration request] 1. A movable core (13) is housed in a working chamber (R) formed between first and second magnetic bodies (6, 7),
It said cylindrical coil assembly comprising a coil (36) capable of generating a magnetic force allowed to operate the movable core (13) (A _C)
Is disposed between both magnetic bodies (6, 7), and the second magnetic body (7)
Coil assembly continues to the magnetic cylinder surrounding the (A _C) (8) is secured to the first magnetic body (6), the coil (3
Grommet (38) having through holes (41, 42) for drawing out the lead wires (39, 40) connected to 6) to the outside.
In an electromagnetic actuating device in which is fitted to the magnetic cylindrical body (8),
Grommet (38), an electromagnetic actuating device, characterized in that it is formed of an elastic material having a first magnetic body (6) and coil assembly (A _C) interposed section interposed between the (44) . 2. A movable core (13) is housed in a working chamber (R) formed between the first and second magnetic bodies (6, 7),
It said cylindrical coil assembly comprising a coil (36) capable of generating a magnetic force allowed to operate the movable core (13) (A _C)
Is disposed between both magnetic bodies (6, 7), and the second magnetic body (7)
Coil assembly continues to the magnetic cylinder surrounding the (A _C) (8) is secured to the first magnetic body (6), the coil (3
Grommet (46) having through holes (48, 49) for drawing out the lead wires (39, 40) connected to 6) to the outside.
The electromagnetic actuator but fitted to the first magnetic body (6), the grommet (46), the first magnetic body (6) and coil assembly (A _C) interposed section interposed between (47, 5
An electromagnetic actuation device having 1) and formed of an elastic material.