JPH0433547A - Motor - Google Patents

Abstract

PURPOSE:To easily resin-mold by providing a support member to be engaged with the slot of a stator core, providing an insulating holding member between the support member and the slot, resin-molding them integrally with a stator to form a frame, and securing a bracket to the end of the frame by the support member. CONSTITUTION:A support member 9 is engaged at its end 11 with a bracket 7 and caulked. A holding member 12 is provided at its outer periphery, and the member 12 is provided with a radial rib formed of a vinyl soft material. The rib is deformed, and can be inserted into the slot 13 of a core 1. In such a structure, a winding 2 is provided on the core 1, the member 9 is inserted into the slot 13, and resin-molded to form a frame 10.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an electric motor having a structure in which a bracket can be easily fixed to a resin-molded frame.

[Prior Art] When fixing a bracket to a resin-molded frame, adhesion does not provide sufficient fixing strength, so a nut made of filler metal is often provided and the bracket is fixed with screws.

In addition, a through hole is formed in the frame, and a pin is passed through the frame and fixed by caulking or bolts and nuts.

[Problems to be solved by the invention] In the conventional structure, when a filler metal for screwing the screw is provided,
The six screws had to be installed in the mold without being buried, which was troublesome in production.

Furthermore, when forming a through hole in the frame, there is a risk that the pin of the mold for forming the through hole may come into contact with the winding, etc., which may cause problems such as deterioration of insulation.

In either case, although the fixing strength of the bracket is increased, manufacturing is troublesome.

The present invention was made in view of these circumstances, and
The purpose of the present invention is to provide an electric motor that is easy to manufacture when the frame is formed using a resin mold.

[Means for Solving the Problems 1] The present invention provides a donut-shaped stator core with slots formed therein for winding, a support member that fits into the slots, and a support member that fits into the slots. The problem was solved by providing an insulating holding member interposed between the parts, molding the resin together with the stator to form a frame, and providing a bracket at the end of this frame and fixing it with the supporting member. are doing.

[Function] Since the support member that fits into the slot has a holding member interposed between it and the slot, it is possible to prevent the support member from coming into contact with the windings etc. housed in the slots, thereby preventing deterioration of the insulation of the windings, etc. The occurrence of failures can be avoided.

Since the supporting member is held within the slot by the holding member and will not fall off, when molding the frame,
The support member does not fall out of the slot, making manufacturing easier.

Furthermore, since it is possible to use a material with high mechanical strength, such as aluminum or brass, for the supporting member, and a relatively soft resin member can be used for the holding member, there is no negative impact on live parts such as windings. It can be assembled without providing anything.

[Example] The present invention will be explained based on an example shown in the drawings. Fig. 1 is a vertical cross-sectional view of a main part of an electric motor according to an example of the invention, and Fig. FIG. 3 is a perspective view of the support member provided with the member, and FIG. 3 is a plan view of the main part showing the state in which the support member is attached.

In FIG. 1, the electric motor has a donut-shaped stator 3 formed by winding 2 around an iron core 1, and a rotor 4 fixed to a shaft 5 on the inner diameter side of the stator 3. .

The shaft 5 is rotatably supported with bearings 6a and 6b on both sides.

The bearings 6a and 6b are each mounted on a bracket 7.8.
The brackets 7 , 8 are each configured to be integral with the stator 3 .

One bracket 7 is manufactured by press-forming a steel plate, and is fixed to a support member 9 fitted to the iron core 1 by caulking.

The other bracket 8 is made of resin mold and is integrally molded with a frame 10 that covers the stator 3.

In FIG. 2, the support member 9 has a tip end 11 formed into a pipe shape, and is configured to be fitted onto the bracket 7 and caulked.

A holding member 12 is provided on the outer diameter side, and this holding member 12 is made of a relatively soft vinyl material and is provided with radial ribs.

This radial rib is easily deformable and is configured so that it can be deformed and inserted into the slot 13 of the iron core 1 as shown in FIG.

In such a configuration, the winding 2 is provided on the iron core 1, the support member 9 is inserted into the slot 13, and the frame 10 is formed by resin molding.

Due to this resin mold, the support member 9 may flow together with the injected resin when the resin is injected.
Since the holding member 12 is fitted into the slot 13, it will not move easily and the supporting member 9 will be buried in a predetermined position.

Furthermore, although the holding member 12 comes into contact with the winding 2, since the holding member 12 can be deformed, damage caused by forcibly rubbing the winding 2 can be avoided.

For this reason, if the gap between the slots 13 becomes large,
It is necessary to increase the outer diameter of the holding member 12, and it is necessary to configure it so that an appropriate fitting pressure can be obtained.

Further, the material of the holding member 12 may be a soft material such as vinyl, but other materials such as rubber may equally be used as long as it does not change in quality due to the heat of the resin mold.

Further, since the holding member 12 comes into contact with the winding 2, it may be made of an insulating material and may be deformable, and is not limited to a structure including ribs.

In the embodiment shown in FIG. 1, the other bracket 8 is integrated with the frame 10, but this bracket 8 can also be made by press-forming a steel plate like the one bracket 7. In this case, the support member 9 may be configured to penetrate the iron core 1 and act on the other bracket 8 as well.

In addition, when fixing the support member 9 to the bracket 7 by caulking, the tip 11 of the support member 9 may be passed through the bracket 7 and widened using a jig, or alternatively, it may be supported with screws without being caulked and fixed. It is also possible to configure it so that it is screwed into the member 9.

[Effects of the Invention] According to the present invention, the support member for fixing the bracket is attached to the stator via the holding member and resin molded integrally with the frame, so resin molding can be easily performed and the winding wires can be easily molded. Resin molding can be carried out without damaging the materials, and the effect is extremely large.

[Brief explanation of the drawing]

FIG. 1 is a vertical cross-sectional view of a main part of an electric motor according to an embodiment of the present invention, FIG. 2 is a perspective view of a support member including a holding member thereof, and FIG. FIG. 1... Iron core, 2... Winding wire, 3... Stator,
4...Rotor, 7.8...Bracket, 9...
- Supporting member, 10... Frame, 12... Holding member, 13... Slot.

Claims (1)

[Claims] Slots are formed in a donut-shaped stator core and windings are applied thereto, a support member that fits into the slot is provided, an insulating holding member is provided between the support member and the slot, and these An electric motor characterized in that a frame is formed by integrally molding a stator with a resin, a bracket is provided at an end of the frame, and the frame is fixed by the support member.