JPH0423406B2 - - Google Patents

Description

[Detailed Description of the Invention] [Object of the Invention] (Industrial Application Field) The present invention relates to an electromagnetic device, which is inserted between an iron core body and a coil, and generates electricity when a predetermined alternating current voltage is applied to the coil. The present invention relates to a spacer that prevents whirring noise caused by core vibration and coil vibration, and maintains an insulating distance between the coil and the core body.

(Prior Art) As shown in FIGS. 3 and 4, in the conventional electromagnetic device of this type, a wedge-shaped spacer 3 is press-fitted between an iron core 1 and a coil 2 attached to the iron core 1. A structure is adopted in which a coil 2 is fixed to a body 1.

Generally, electromagnetic devices are treated with varnish, but varnish deteriorates over time and the adhesion of the varnish decreases significantly. It is necessary to achieve the purpose of insulation between the coil and the iron core, and varnish treatment must be considered as an auxiliary means.

(Problems to be Solved by the Invention) In the conventional structure, the spacer 3 is formed into a wedge shape, so the spacers 3, 3 inserted along both end surfaces of the iron core 1, as shown in FIG. ,
If the sparser 3 is not press-fitted evenly and the varnish deteriorates, the sparser 3 that has been inserted shallowly will come off due to the vibration of the core body and coil when power is applied, causing a loud whirring noise, and the contact between the end surfaces of the core body 1 and the coil 2. Due to the uneven distance between the coils 2 and the iron core 1, the insulation distance between the coil 2 and the iron core 1 is shortened on the side where the spacer 3 is inserted shallowly, resulting in insufficient insulation distance, and as shown in FIG. 3 may be tilted, or the spacer 3 may come into contact with the coil 2 at one point as shown in FIG. It has the problem of poor assembly workability.

The present invention was made in view of the above-mentioned problems.A spacer is inserted between a coil and an iron core to maintain an insulating distance between the coil and the iron core. Even if there are variations in finish, the spacer is inserted reliably, prevents the spacer from slipping out, and applying AC voltage prevents the occurrence of whining noise due to core vibration and coil vibration, resulting in process defects and defects due to changes over time. The present invention provides an electromagnetic device that does not require any damage.

[Structure of the invention]

(Means for Solving the Problems) The electromagnetic device of the present invention has a core body formed of a laminated core, a coil attached to the core body, and a space between both end faces of the core body and the coil. It consists of a spacer molded from resin that determines the distance between the inserted iron core body and the coil, and a stopper portion for positioning and holding the spacer is formed protrudingly on the spacer, and the iron core of the iron core body is attached to the spacer. It is characterized by the addition of flexible insulating plates in the stacking direction.

(Function) In the electromagnetic device of the present invention, a flexible insulating plate is attached to a spacer in the direction of the core insulation of the core body, and the spacer is strongly inserted between the core body and the coil along both end faces of the core body. By doing so,
The flexibility of the insulating plate absorbs variations in the insulation thickness of the core body, variations in the finish of the coil inner diameter, etc., allowing both spacers to be inserted evenly, and the insulation gap between the core body and the inner circumferential surface of the coil is maintained at both ends of the core body. The surfaces can be substantially the same.

(Embodiment) The configuration of an embodiment of the present invention will be described with reference to FIGS. 1 and 2.

Reference numeral 10 denotes an iron core body, which is composed of an E-type laminated core 11 and an I-type laminated core 12. A coil 13 is fitted and attached to the central leg part 14 of the E-type laminated core 11, and the I-type is attached to the E-type laminated core 11. The laminated cores 12 are butted against each other, and the side legs of the E-shaped laminated core 11 and the I-shaped laminated core 12 are welded. Further, both the laminated cores 11 and 12 are welded at their central portions in the lamination direction. Furthermore, E type laminated core 11
The bottom part is welded to a mounting plate (not shown).

Next, reference numeral 16 denotes an insulating spacer molded from synthetic resin that is inserted between the iron core 10 and the coil 13 and defines the distance between the iron core 10 and the coil 13. As shown in FIG. One side surface 17 is formed in an inclined shape so as to become thinner toward the side, and a stopper portion 18 that is engaged with the outer circumferential surface of the coil 13 is formed in a projecting shape at the base end of this one side surface 17. There is.

Further, a recess 23 is formed in the other side surface 22 of the spacer 16 that is joined to the end surface of the iron core body 10 . And the center leg portion 14 of the E-type laminated core 11 of the core body 10
If the end face of the iron core body 10 is welded in the lamination direction to prevent whining noise caused by vibration of the iron core body 10, welding sag will occur in the lamination direction, and this welding sag will cause the iron core body 10 to sag.
A recess 23 is formed in the spacer 16 even if the spacer 16 protrudes from the end face of the core 10 and the coil 13.
It is inserted securely between the

Next, 25 is an insulating board made of felt, flamed, etc.
Molded from a flexible material such as non-woven fabric or pressboard, this insulating plate 25 is connected to the spacer 16.
The iron core body 10 is attached to the outer periphery of the
The spacer 16 is interposed in the stacking direction to cover the spacer 16 except for the stopper part 18.

Next, the operation of this embodiment will be explained.

Coil 1 is attached to the center leg portion 14 of the E-type laminated core 11.
3, the I-shaped laminated core 12 is butt-joined and welded to form an electromagnetic body 19 having a core gap as shown in FIG.

Next, the flexible insulating plate 25 is attached to the iron core 10 by folding the tip end side around the outer periphery of the spacer 16.
The spacers 16, 16 are strongly inserted between the iron core 10 and the coil 13 along both end surfaces of the iron core 10, and the spacers 16, 1
Both spacers 1
6 and 16 are uniform, and the insulation gap l between the core body 10 and the inner peripheral surface of the coil 13 is equal to that of the core body 1.
The two end faces of 0 are substantially the same.

The insulating plate 25 is connected to the spacer 16 and the coil 13.
and between the spacer 16 and the core body 10, the flexibility of the insulating plate 25 absorbs variations in the laminated thickness of the core body 10, variations in the finish of the inner diameter of the coil, and prevents damage to the coil 13. The spacer 16, the coil 13, and the iron core 10 are separated from the insulating plate 25 by varnish treatment.
It is tightly fixed through.

Note that the spacers 16, 16 may be inserted before joining the I-type laminated core 12 with the coil 13 fitted to the E-type laminated core 11 of the core body 10.

[Effects of the Invention] According to the present invention, a stopper portion for positioning and holding the spacer is formed on the spacer inserted between the core body and the coil, and a flexible insulating plate in the stacking direction of the core body is attached to the spacer. Since the spacer is positioned and held by the stopper part, it is possible to prevent damage to the coil, and when inserting the spacer, the insertion dimensions of the spacer can be equalized, and the spacer can be prevented from coming off, and the connection between both end faces of the iron core body and the coil can be made uniform. Since the insulation gap can be kept constant, an electromagnetic device of stable quality can be obtained and workability can be improved.

[Brief explanation of drawings]

Fig. 1 is a sectional view of an electromagnetic device showing an embodiment of the present invention, Fig. 2 is a perspective view of a spacer as above, Fig. 3 is a perspective view of a core body of a conventional electromagnetic device, and Fig. 4 is an electromagnetic device as above. FIG. 5 is a sectional view showing a state in which the spacer is incorrectly inserted, FIG. 6 is a perspective view showing the spacer in a state in which the spacer is incorrectly inserted, and FIG. 7 is a plan view of the same. 10... Iron core body, 13... Coil, 16... Spacer, 18... Stopper portion, 25... Insulating plate.

Claims (1)

[Claims] 1. An iron core formed of a laminated iron core, a coil attached to this iron core, and a coil inserted between both end faces of this iron core and the coil. and a spacer molded from resin to determine the interval between the spacers, a stopper part for positioning and holding the spacer is formed protrudingly on the spacer, and a flexible insulating plate is attached to the spacer in the direction of core lamination of the core body. An electromagnetic device characterized by: