JPH04138041A - Motor - Google Patents

Abstract

PURPOSE:To avoid the swelling of an insulating member provided between the inside of the end surface of a motor shell and a winding and make an assembly work easy by a method wherein the insulating member retains the outer circumference of the bearing holder of the motor shell in such a manner that its inner circumference is partially pushed and enlarged. CONSTITUTION:An insulating member 7 which has an inner circumference 7a having an inner diameter a little larger than the outer diameter of the bearing holder 3 of a motor shell 4 and, further, having a plurality of protrusions 7b directed toward the center is provided between the inside of the end surface of the motor shell 4 having the bearing holder 3 and a winding 6. Further, the inner diameter of an imaginary circle formed by connecting the respective tips of the protrusions 7b is a little smaller than the outer diameter of the outer circumference of the bearing holder 3. With this constitution, the insulating member 7 retains the outer circumference of the bearing holder 3 of the motor shell in such a manner that its inner circumference is partially pushed and enlarged a little and hence the swelling of the insulating member 7 can be avoided and the winding is not pressed, so that an assembly work can be performed easily.

Description

DETAILED DESCRIPTION OF THE INVENTION Industrial Field of Application In the present invention, the spatial insulation distance between the winding and the inner side of the end face of the motor jacket is less than or equal to a specified value. This relates to electric motors used in electric powered devices such as ventilation fans.

BACKGROUND OF THE INVENTION Conventionally, insulation for this type of motor has generally been provided between the inner side of the end face of the motor jacket 101 and the winding 102, as shown in FIGS. 4 and 5, although no specific literature can be cited. A hollow disk-shaped insulating member 103 is arranged to ensure insulation between the motor jacket 101 and the winding 102, and this insulating member 103 is used to prevent it from falling during assembly. The inner diameter was slightly smaller than the outer diameter of the bearing holding part 104 provided inside both end faces of the motor jacket 101, and the bearing holding part 104 was fitted and held on the outer periphery of the bearing holding part 104.

Problem to be Solved by the Invention Incidentally, in the conventional insulating member 103, as shown in FIG. A bulge 105 of 103 is likely to occur, and this bulge 105 presses against the winding 102, making assembly work difficult.

The present invention has been made in consideration of the above-mentioned conventional problems, and an object of the present invention is to provide an electric motor that prevents bulging of an insulating member and makes assembly work difficult.

Means for Solving the Problems In order to achieve the above object, the present invention provides a motor jacket having a bearing holding portion inside both ends d, and a winding wound around a stator held inside the motor jacket. and two insulating members each having a hollow disc shape, the inner peripheral portion of which engages with the outer periphery of the bearing retaining portion by being partially pushed out, and the insulating member is located on the inner side of the end surface of the motor covering. and the winding.

Function: With this configuration, the inner periphery of the insulating member is partially pushed out and engaged with the periphery of the bearing holding portion of the motor jacket, so the insulating member does not bulge and the assembly work is simplified. It becomes easier to do.

EXAMPLE Hereinafter, an example of the present invention will be described with reference to FIGS. 1 and 2.

The fir machine outer sheath 4 has a bearing holding part 3 holding a bearing that rotatably supports the rotor l inside both planar end faces, and holds a stator 5 therein. A winding 6 is wound around the wire. A hollow disk is formed between the inner end surface of the motor jacket 4 and the winding 6, and the inner diameter of the inner peripheral part 7a is the outer diameter of the outer peripheral surface of the bearing holding part 3 of the motor jacket 4. An insulating member 7 is provided which is slightly larger and has a plurality of protrusions 7b provided on an inner peripheral portion 7a toward the center. The inner diameter of an imaginary circle connecting the tips of the projections 7b is slightly smaller than the outer diameter of the outer peripheral surface of the bearing holding portion 3.

In the above structure, when assembling the electric motor, the insulating member 7 is held by the inner peripheral portion 7a thereof being engaged with the bearing holding portion 3 of the motor jacket 4 by the protrusion 7b, so that the insulating member 7 is prevented from falling, and the insulating member 7, at this time, only the protrusion 7b of the inner circumferential portion 7a is slightly pushed and expanded, so that the bulge does not occur and press the winding 6, making the assembly work difficult. After assembly, the insulating member 7
is disposed between the inner side of the end face of the motor jacket 4 and the winding 6 to ensure insulation.

Next, a second embodiment of the present invention will be described with reference to FIG.

This embodiment differs from the first embodiment in that the insulating member 17
The difference is that is formed as shown below.

That is, the inner circumferential parts 1 and 7 of the hollow disc-shaped insulating member 17
a has an inner diameter slightly smaller than the outer diameter of the outer circumferential surface of the bearing holding portion 3 (but has a plurality of notches 17b facing the outer circumferential portion 17 c l::).

In the above configuration, the insulating member 17 has notches 17b and 1 in the bearing holding portion 3 of the motor jacket 4, the inner peripheral portion 17a of which is adjacent to each other.
7b to be pushed up and partially expanded to engage. Therefore, as in the first embodiment, the insulating member 17 does not bulge, pushing the winding 6 and making the assembly work difficult.

Effects of the Invention As is clear from the above description of the embodiments, according to the present invention, in order to prevent the insulating member from falling during motor assembly, the insulating member bulges when engaged with the bearing holding portion of the motor jacket. Since the windings can be prevented from being pressed against each other, it is possible to provide an electric motor that is easier to assemble.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing the vicinity of a bearing part of a motor according to an embodiment of the present invention, FIG. 2 is a plan view of an insulating member of the motor, and FIG. 3 is an insulation diagram of a motor according to a second embodiment of the present invention. A plan view of the member,
Figure 4 is a sectional view showing the area around the bearing part of a conventional electric motor.
The figure is a plan view of an insulating member of the same electric motor. 3... Bearing holding part, 4... Motor jacket, 5... Stator, 6... Winding wire, 7, 1
7... Insulating member, 7a, 17a... Inner peripheral part. Name of agent: Patent attorney Kokaji Akihabara, 2 people, 6-1 Inner circumference, Fig. 1

Claims (1)

[Claims] a motor jacket having bearing holding portions inside both end faces; a winding wound around a stator held inside the motor jacket;
It has a hollow disk shape and has an insulating member whose inner periphery is partially pushed out and engaged with the outer periphery of the bearing holding part, and the insulating member is connected to the inner side of the end surface of the motor jacket and the winding. An electric motor placed between the