JP3216238B2 - Mold motor - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a molded motor in which a stator is molded with a resin.

[0002]

2. Description of the Related Art A conventional molded motor generally has a structure as shown in FIG. The configuration will be described below with reference to FIG. 1 is a stator core, 2 is a stator coil, 3
Is a resin covering the stator, 4 is a bracket having a bearing housing, 5 is a bearing, 6 is a rotor, and 7 is a shaft. In the above configuration, the rotor 6 and the bearing 5 are attached to the shaft 7.
When the stator coil 2 is energized, the rotor finished product to which is fixed has a predetermined gap with the stator core 1 and rotates.

Further, when the stator is molded with the resin 3, the pressure of the resin 3 pushes the stator coil 2 to the vicinity of the press-fit portion of the bracket 4, and sometimes the stator coil 2 is exposed to the inner diameter of the mold to cause electrical failure such as withstand voltage. In order to prevent this, as shown in FIG. 3, the coil end 20 is covered with an insulator 8 made of resin.

[0004]

However, in such a conventional motor configuration, although the withstand voltage failure can be prevented, the stator coil 2 and the insulator 8 are caused by the pressure of the resin 3.
Is pressed into the vicinity of the press-fitted portion of the bracket 4, the thickness of the resin 3 in the vicinity of the press-fitted portion becomes uneven, and sometimes a considerable area of the inner diameter of the insulator 8 is exposed to the inner diameter of the mold. 4 had a problem that the pullout strength was extremely reduced.

An object of the present invention is to solve the above-mentioned problems, and an object of the present invention is to provide a molded motor which prevents an electrical failure such as a withstand voltage and stabilizes a bracket withdrawal strength.

[0006]

In order to achieve the above object, a molded motor according to the present invention is provided with convex portions provided at equal intervals on an inner diameter of an insulator, and when a stator core is molded with resin, a coil position is set at a center of a mold. Is regulated.

[0007]

According to the present invention, the position of the coil end in the resin molding is regulated by the above-described structure, so that the thickness of the resin in the press-fitted portion can be made uniform, thereby preventing the withstand pressure defect and the strength of the bracket coming off. Can also be secured.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A molded motor according to an embodiment of the present invention will be described below with reference to FIG.

In FIG. 1A, convex portions 9 are arranged at equal intervals on the inner diameter of an insulator 8 for the purpose of insulating a coil end.

FIG. 1B shows an insulator 8 in which a projection 9 is disposed on the inner diameter of FIG. 1A at a coil end 20 of the stator comprising the stator core 1, the stator coil 2 and a terminal (not shown). It is a figure installed in a cover mold, and 10 is an upper mold of a mold, 11 is a lower mold, and 12 is a center.

At this time, as shown in FIG. 1 (b), the coil end is regulated by convex portions 9 which are uniformly arranged on the outer diameter of the core 12 and the inner diameter of the insulator 8, and molded with resin in this state. Also, the stator coil 2 hardly moves to the bracket press-fitting portion (see FIG. 3) due to the pressure of the resin.

As described above, according to the configuration of the molded motor of the embodiment of the present invention, the thickness of the resin in the bracket press-fitting portion can be made uniform, thereby preventing an electrical failure such as a withstand voltage and also improving the strength of the bracket to be removed. We can secure enough.

[0013]

As is apparent from the above description of the embodiment, according to the molded motor of the present invention, the position of the coil end is regulated during the resin molding, so that the thickness of the resin at the bracket press-fitting portion can be made uniform. It is possible to prevent electrical failures such as pressure resistance and to secure sufficient strength of the bracket to come off.

[Brief description of the drawings]

FIG. 1A is a perspective view showing a configuration of an insulator used in a molded motor according to an embodiment of the present invention. FIG. 1B is a cross-sectional view showing a state in which a stator equipped with the insulator is installed in a mold.

FIG. 2 is a half sectional view showing a configuration of a conventional molded motor.

FIG. 3 is a half sectional view showing a configuration of a conventional molded motor.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Stator core 2 Stator coil 3 Resin 8 Insulator 9 Convex part 20 Coil end

Claims (1)

(57) [Claims] 1. A molded motor comprising a stator completed by inserting a completed rotor into a completed stator including a stator coil and its terminal portion with a resin, and press-fitting a bracket from a non-load side. A mold motor in which an insulator formed of resin having a shape in which a convex portion is provided evenly on the inner diameter is placed over the coil end on the non-load side when molding with.