JPH0214297Y2 - - Google Patents

Description

[Detailed Description of the Invention] (a) Field of Industrial Application This invention relates to an improvement in the mounting configuration of an insulating sheet used when attaching a winding to a stator core of an electric motor.

(b) Prior Art Conventionally, insulating paper is attached to the slots of the stator core as shown in FIGS. 1A and 1B. That is, four separate rectangular insulating papers c are attached to each slot b of the stator core a, and the insulating papers c are positioned so that one end abuts an end of a protrusion d provided on the inner surface of the stator core a. I'm doing it. However, in this positioning, the movement of the insulating paper c in three directions is not restricted as shown by the arrows in FIG.
There were cases where the parts were misaligned, resulting in poor insulation.

(c) Purpose of the invention This invention was made in view of the above points, and aims to provide an electric motor that does not suffer from insulation defects due to displacement of the insulation sheet within the slot.

(d) Structure of the invention The structure of this invention is that the insulating sheet is long enough to reach between the slots facing each other, and a positioning opening is provided, and a positioning protrusion is provided on the inner surface of the stator core.The detailed structure is as follows. In an electric motor that has a stator core and a rotor in a bracket, and windings are installed through insulating sheets in four slots recessed in the inner surface of the stator core, the insulating sheet is long and a positioning opening is provided at an intermediate position. and a positioning protrusion that fits into the positioning opening of the insulating sheet is provided on the inner surface of the stator core between the two pairs of opposing slots, and the insulating sheet is arranged along the inner surface of the stator core so as to cause the positioning protrusion to protrude into the positioning opening. The electric motor is characterized in that both ends thereof are disposed in opposing slots.

(e) Examples Examples of this invention will be described below in detail with reference to the drawings, but this invention is not limited to the following examples.

The overall structure of the electric motor 1 having an integral fan will be briefly described with reference to FIG.

2 is a bracket in which a stator core 3 is fitted, and a rotor 4 is provided within the stator core 3 to rotate. The rotation axis of the rotor 4 directly serves as the rotation axis of the fan inside the fan case 5. 6 is a winding wire, and 7 is an insulating sheet, which is a feature of this invention. FIG. 3 shows the structure of the stator core 3 provided inside the one shown in FIG. The stator core 3 has four slots 8 located above and below, and the two slots 8 on the top and bottom are located facing each other. The insulating paper 7 is of the kind shown in FIG. 4, and is long enough to reach the opposing slots 8, with a positioning opening 9 provided in the center. The installation is carried out as shown in FIGS. 5A and 5B, with the insulating paper 7 fitted into the positioning opening 9 with the positioning protrusion 10 provided at the center of the inner surface between the opposing slots 8 of the stator core 3. and curve both ends thereof and position it in the slot 8. The length of the insulating paper 7 used is the opening end 1 of one slot 8.
1 to the open end 11 of the other slot 8 along the inner surface of the stator core 3, and the width is slightly larger than the thickness of the stator core 3, so that both side edges protrude from the stator core 3 when installed. The insulating paper 7 shown in FIG. 2 is the protruding portion.

In this way, the long insulating paper 7 is inserted into the pair of slots 8.
Therefore, two sheets of insulating paper 7 are used in one electric motor 1. FIG. 3 shows the winding 6 installed between the slots 8 located above and below on the left side.

Although insulating paper was used as the insulating sheet in the above embodiment, it is of course possible to use a plastic sheet, and the openings may be formed in the insulating sheet by punching.

Further, in the above embodiment, an electric motor with which the fan is integrated is used, but of course, this electric motor can be used as driving means for various types of equipment.

(f) Effects of the invention Since this invention is structured as described above,
The insulation sheet is perfectly positioned and the insulation between the stator core and the windings is maintained well. Furthermore, since two insulating sheets are used during manufacturing, compared to the conventional four, the installation work is simplified.

[Brief explanation of drawings]

FIGS. 1A and 1B are a perspective view and a schematic diagram showing a conventional insulating paper mounting structure. Fig. 2 is a plan view of an embodiment of the electric motor of this invention, Fig. 3 is a front view of an embodiment of the stator core used in the motor shown in Fig. 2, and Fig. 4 is a plan view of an embodiment of the insulating paper used in this invention. FIGS. 5A and 5B are equivalent views of FIGS. 1A and B in this invention. 1... Electric motor, 2... Bracket, 3... Stator core, 4... Rotor, 6... Winding wire, 7... Insulating paper (insulating sheet), 8... Slot, 9... Positioning opening, 10... Positioning protrusion.

Claims (1)

[Scope of utility model registration request] In an electric motor that has a stator core and a rotor in a bracket and windings are installed through insulating sheets in four slots recessed into the inner surface of the stator core, the insulating sheet is long and a positioning opening is provided at an intermediate position. , and a positioning protrusion that fits into the positioning opening of the insulating sheet is provided on the inner surface of the stator core between the two pairs of opposing slots, and the insulating sheet is placed along the inner surface of the stator core so as to cause the positioning protrusion to protrude into the positioning opening. An electric motor characterized in that both ends of the electric motor are arranged in opposing slots.