JPH0412647Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to an improvement of an electromagnetic solenoid used for opening and closing a fluid control valve.

[Conventional technology]

FIG. 2 is a sectional view showing a conventional electromagnetic solenoid. In the figure, reference numeral 1 denotes a case, in which a fixed iron core 2 is integrally provided and forms a magnetic circuit together with an end plate 3. 4 is a solenoid coil, which is wound around a winding frame 5 made of synthetic resin;
It is housed in case 1. A movable iron core 6 is fixed to an output shaft 7, and this output shaft is supported by a bearing 8. Reference numeral 9 denotes a sleeve made of a non-magnetic material that is inserted and fixed to the inner circumferential side of the winding frame 5, and is a sleeve made of a non-magnetic material.
We support this movement freely. Reference numeral 10 denotes an auxiliary spring that presses the movable iron core 6 in the suction movement direction.

The electromagnetic solenoid configured in this manner is coupled to the control valve 11.

The operation of the conventional electromagnetic solenoid described above is as follows. When the solenoid coil 4 is energized, the movable core 6 resists the spring pressure of the return spring (not shown) on the valve device side due to magnetic attraction to the fixed core 2.
Move the output shaft 7 in the c direction.

[Problem that the invention attempts to solve]

In the conventional electromagnetic solenoid as described above, the fixed iron core 2 is formed integrally with one end of the case 1 and protrudes largely inward, which poses a problem in that post-processing of the inside of the case is troublesome.

This invention was made to solve these problems, and the purpose is to obtain an electromagnetic solenoid that facilitates the processing and formation of a fixed core and improves productivity.

[Means for solving problems]

The electromagnetic solenoid according to this invention has a circular recess cut in the axial direction at the center of one end of the case, and the inner circumferential surface and rear end surface of this recess form the suction part of the fixed iron core, and the movable iron core The suction end of the iron core fits into the recess of the fixed iron core.

[Effect]

In this invention, a fixed core suction part is formed by a recess provided in the center of one end of the case, which increases the area of the suction surface, increases the suction force of the movable core, and facilitates machining. Become.

〔Example〕

FIG. 1 is a sectional view showing an embodiment of the electromagnetic solenoid according to this invention. Reference numeral 21 denotes a case made of a magnetic material and forming a yoke, in which a suction part is recessed into the center of one end and a fixed iron core 22 is provided, and an end member 23 made of a magnetic material is fixed to the other end to form a magnetic circuit. form. A recess 22a into which the fixed iron core 22 is inserted forms an inner circumferential surface 22b and a rear end surface 22c of the suction portion. 24 is a solenoid coil wound around a winding frame 25 made of a synthetic resin material, and is housed in the case 21. 26 is a cylindrical movable iron core, and 27 is an output shaft made of a non-magnetic material, which passes through the movable iron core 26 and is fixed thereto, and is movably supported by a non-magnetic sliding bearing 28 and a sliding ball bearing 29. 30 is an auxiliary spring that applies pressure to the movable iron core 26; 31 is made of a non-magnetic material; and the end member 2
Slide ball bearing 2 with a catch seat inserted and fixed in 3
It prevents the outer ring and retainer of No. 9 from coming off, and
Receives the auxiliary spring 30.

The electromagnetic solenoid configured in this manner is coupled to the control valve device 11.

In the electromagnetic solenoid of the above embodiment, when the solenoid coil 24 is energized, the movable core 26 is magnetically attracted to the fixed core 22, resists the spring pressure of the return spring (not shown) on the valve device side, and
7 in direction c.

In the fixed iron core 22, the suction part is formed in the inner center of one end of the case 21 by recessing into the recess 22a, and the inner diameter of the recess 22a can be increased.
The areas of the inner circumferential surface 22b and the inner end surface 22c become larger, the suction area increases, and the suction ability increases.
Further, post-processing of the inside of the case 21 is easier than in the conventional case.

The electromagnetic solenoid according to this invention is used to control the opening and closing of flow control valves, fluid pressure control valves, liquid switching valves, and the like.

[Effect of idea]

As described above, according to this invention, a circular recess is formed in the inner center of one end of the case to form a fixed core that serves as a suction part, so that the inner circumferential surface with respect to the radial gap and the depth with respect to the axial gap are formed. The area of the end face is increased, the suction capacity is increased, and
Post-processing of the inside of the case becomes easier, improving productivity.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing an embodiment of the electromagnetic solenoid according to this invention, and FIG. 2 is a sectional view showing a conventional electromagnetic solenoid. 21... Case, 22... Fixed iron core, 22a...
...Circular recess, 22b...Inner circumferential surface, 22c...
Back end surface, 23... end member, 24... solenoid coil, 26... movable iron core, 27... output shaft, 2
8, 29...Bearings, and the same reference numerals in the drawings indicate the same or corresponding parts.

Claims (1)

[Scope of utility model registration request] A case with an end member fixed to the other end to form a yoke for the magnetic path, a solenoid coil housed in this case, and a circular recess recessed in the axial direction provided at the center of one end of the case to attract attraction. A fixed core having an inner circumferential surface and a rear end surface formed therein, a movable core having a cylindrical shape and whose tip faces the concave portion of the fixed core, penetrating through this movable core and fixed therein; An electromagnetic solenoid is equipped with an output shaft and a pair of bearings on both sides that movably support the output shaft.