JPH0150087B2 - - 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 whining 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. 1 and 2, this type of conventional electromagnetic device has a wedge-shaped spacer 3 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 the varnish deteriorates over time and the adhesive strength of the varnish decreases significantly. It is necessary to suppress this and achieve the purpose of insulating 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 in a wedge shape. Therefore, as shown in FIG. ,
If the spacer 3 is not press-fitted evenly and the varnish deteriorates, the spacer 3 that was inserted shallowly will come off due to the vibration of the core body and coil when power is applied, causing a loud whirring sound, and causing the spacer 3 to become loose between both end faces of the core body 1 and the coil 2. Because of 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 disadvantage of poor assembly workability.

The present invention has been made in view of the above-mentioned problems, and a spacer is inserted between a coil and a laminated core to maintain an insulation distance between the coil and the laminated core. It is possible to prevent pull-out, uniformly control the insulation distance between the iron core and the coil, and prevent the occurrence of whining noise due to core vibration and coil vibration due to the application of AC voltage, and to prevent process defects and defects due to changes over time. This provides an electromagnetic device free of

[Structure of the Invention] (Means for Solving the Problems) The electromagnetic device of the present invention includes a laminated core body, a coil attached to the core body, and a coil between both end faces of the core body and the coil. The wedge-shaped spacer is inserted and molded from resin to define the distance between the core body and the coil. The device is characterized in that it is provided with a stopper portion that is engaged to position and hold the spacer.

(Function) In the electromagnetic device of the present invention, the spacer is butted between the core bodies and the coil on both end faces of the laminated core body, positioned and firmly inserted so as to cross the joint of the core, and the stopper portion of the spacer is inserted into each coil. By engaging the outer peripheral surface of the spacer, the insertion amount of both spacers becomes uniform, and the insulation gap between the core body and the inner peripheral surface of the coil becomes substantially the same on both end faces of the core body.

(Embodiment) The configuration of an embodiment of the present invention is shown in drawings 6 to 8.
The diagram will be explained.

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 together, and the side legs 15 of the E-type laminated core 11 and the I-type laminated core 1 are
Weld 2. Further, both the laminated cores 11 and 12 are welded at their central portions in the lamination direction. Furthermore, the bottom of the E-shaped laminated core 11 is welded to the mounting plate 26.

Next, 16 is an insulating wedge-shaped 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 distal end 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. ing.

Next, the operation of this embodiment will be explained.

The coil 1 is attached to the central 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 cavity as shown in FIG.

Next, as shown in FIG.
The iron core body 10 and the coil 13 on both end faces of the iron core body 10
Both spacers 16, 1 are firmly inserted while being positioned so as to cross the joint between the butt cores, and the stopper portions 18 of the spacers 16, 16 are abutted and engaged with the outer peripheral surface of the coil 13, respectively.
6 becomes uniform, and the iron core body 10 and coil 1
The insulation gap 〓l between the inner peripheral surface of the iron core 10 and the inner peripheral surface of the iron core 10 is substantially the same on both end surfaces of the iron core 10.

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.

〔Effect of the invention〕

According to the present invention, the spacer is inserted between the core body on both end faces of the laminated core body and the coil while being positioned so as to cross the joint of the butt core, and the spacer is engaged with the outer peripheral surface of the coil. Since a stopper part is formed to position and hold the spacer, when inserting the spacer, it is press-fitted evenly on both end faces of the spacer insertion dimension, preventing the spacer from coming off, and the insulation distance between the iron core and the coil can be managed uniformly. Vibration in the lamination direction is suppressed, the joint portion of the butt core is sandwiched, reducing the noise level, an electromagnetic device of stable quality is obtained, and manufacturing workability is improved.

[Brief explanation of drawings]

Fig. 1 is a perspective view of the iron core of a conventional electromagnetic device, Fig. 2 is a sectional view of the same electromagnetic device, Fig. 3 is a sectional view showing an incorrectly inserted spacer as above, and Fig. 4 is an incorrectly inserted spacer as above. 5 is a plan view of the same as above, FIG. 6 is a perspective view of an electromagnetic device showing an embodiment of the present invention, FIG. 7 is a sectional view of the above, and FIG. 8 is a perspective view of the spacer as above. be. DESCRIPTION OF SYMBOLS 10... Laminated iron core body, 13... Coil, 16... Spacer, 18... Stopper part.

Claims (1)

[Scope of Claims] 1. A laminated core, a coil attached to the core, and a resin inserted between both end faces of the core and the coil to define a distance between the core and the coil. a wedge-shaped spacer formed by molding, and the wedge-shaped spacer is provided with a stopper portion that is positioned so as to cross the butt joint of the iron core body and engaged with the outer peripheral surface of the coil to position and hold the spacer. An electromagnetic device characterized by.