JPH10271786A - Magnet motor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To attain a motor formed into a thin type and lightened in weight, by integrally molding a wall larger than a commutator external shape and a wall larger than a bearing or bearing housing, 10 a rotor having an end plate with fin, with an electrical insulator. SOLUTION: A fin 2 of an end plate 1, preventing protrusion of a coil end from the periphery of a rotor core 4 even when a coil end 3 after winding is compression molded, is formed of material equal to or magnetic material equivalent to the rotor core 4. A slot hole is formed in the same shape to a slot of the rotor core 4, to be constituted by the end plate 1 having the fin 2 extension bending teeth with an external shape in the dimension equal to the rotor core 4, to be set up in both ends of the rotor core 4. A wall 6 of an insulator 5 stores a commutator 7, a winding is insulated by the insulator 5 itself, the inside of the fin 2, slot and the wall 6 are integrally molded. Accordingly, by a wall internal space storing the coil end, commutator 7, bearing or bearing housing, the dimension of length of a motor can be shortened.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnet motor used for electrical equipment, electric tools, and the like.

[0002]

2. Description of the Related Art A conventional magnet motor will be described with reference to FIG.

As shown in FIG. 3, an electric insulator A surrounds an inner surface of a slot for insulating windings and both end surfaces of a rotor core B.
, A storage space D for storing the coil end C is provided.

For this reason, the length of the motor has been increased, and the mass of the motor has also been increased.

[0005]

Generally, a motor mounted on a vehicle,
There is a strong demand for thinner and lighter motors used in power tools and the like.

An object of the present invention is to reduce the thickness and weight of a motor used in the above-mentioned applications.

[0007]

According to the present invention, a rotor having a finned end plate having an outer diameter equal to that of a rotor core at both ends is integrally formed with a wall larger than an outer diameter of a commutator or a wall larger than a bearing or a bearing housing. Of the present invention.

According to the present invention, a thin and lightweight motor can be obtained.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The invention according to claim 1 of the present invention is characterized in that the rotor core having laminated electromagnetic steel sheets has slot holes of the same shape and the same arrangement as the slots of the rotor core at both ends, and the outer diameter is An end plate made of a magnetic material having fins formed by extending and bending the teeth so as to be equal to or smaller than the outer diameter of the rotor core is provided, and a shaft is attached to the end of the rotor core on the commutator side together with the slots and the fin inner diameter side. This is a magnet motor using a rotor in which a ring-shaped wall protruding in the direction larger than the outer diameter of the commutator is integrally molded with an electrical insulator. Even if the coil end after the rotor winding is compression-molded, the coil end extends from the outer periphery of the rotor core. Since the commutator can be accommodated in the ring-shaped wall without protruding, the length of the coil end and the length of the rotor can be reduced.

According to a second aspect of the present invention, a ring-shaped wall having a diameter larger than the outer diameter of a bearing or a bearing housing, which is axially protruded from a side surface of the rotor core opposite to the commutator, is integrally molded with the electric insulator. In the magnet motor according to the first aspect, the bearing or the bearing housing can be housed in the wall in the same manner as in the first aspect of the invention, so that the length of the rotor can be reduced.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will now be described with reference to FIGS.
This will be described with reference to FIG.

(Embodiment 1) FIG. 1 is a half sectional view of a rotor. In FIG. 1, a fin 2 of an end plate 1 is provided with a coil end from the outer periphery of a rotor core 4 even if the coil end 3 after winding is compression molded. The fins 2 are made of the same material or the same magnetic material as the rotor core 4, have the same slot shape as the slots of the rotor core 4, and are formed by extending and bending teeth having the same outer diameter as the rotor core 4.
, And are installed at both ends of the rotor core 4. The wall 6 of the insulator 5 accommodates the commutator 7, and the insulator 5 itself insulates the winding, and the inside of the fin 2, the slot, and the wall 6 are integrally molded.
The insulator 5 can be made of a synthetic resin such as PET, PBT, PPS, and polyamide resin. The end plate 1 is made of the same magnetic material as the rotor core 4, and the end plate 1 also has a function as a magnetic path.

(Embodiment 2) FIG. 2 shows a half section in which a wall is added to the anti-commutator side of the magnet motor shown in FIG. 1, and a wall 6 accommodates a bearing 8 or a bearing housing 9. And is formed integrally with the wall 6 on the commutator 7 side.

[0014]

As described above, according to the present invention, there is provided an insulator which insulates the end plate having the fin from the inside of the fin and the slot, and integrally forms a wall separating from the winding.
Therefore, there is an advantageous effect that the length of the motor can be shortened and the weight can be reduced because the coil end is compressed by the coil molding and the space inside the wall for accommodating the commutator, the bearing or the bearing housing is provided. Can be

[Brief description of the drawings]

FIG. 1 is a half sectional view of a rotor according to a first embodiment of the present invention.

FIG. 2 is a half sectional view of a rotor according to a second embodiment of the present invention.

FIG. 3 is a half sectional view of a conventional rotor.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 End plate 2 Fin 3 Coil end 4 Rotor core 5 Insulator 6 Wall 7 Commutator 8 Bearing 9 Bearing housing 10 Storage space

Claims (2)

[Claims] A rotor core having a plurality of slots laminated with electromagnetic steel sheets, and disposed on both side end surfaces of the rotor core;
A magnetic material having a slot hole having the same shape and the same arrangement as the slot of the rotor core, and a fin formed by extending and bending the teeth in the anti-rotor core direction so that the outer diameter is equal to or less than the outer diameter of the rotor core. End plate consisting of
An electrical insulator surrounding the inner surface of the slot, the end surface of the end plate and the inner surface of the fin, and a ring-shaped inner diameter larger than the outer diameter of the commutator disposed on the end surface of the rotor core on the commutator side and protruding toward the anti-rotor core side. A magnet motor using a rotor having an electrically insulating wall. 2. The electric insulator according to claim 1, wherein the electric insulator has a ring-shaped inner wall which is disposed on the end face of the rotor core opposite to the commutator and has an inner diameter larger than the outer diameter of the bearing or the bearing housing, and has an electrically insulating wall protruding toward the anti-rotor core. The magnet motor according to claim 1, wherein: