JPH07123618A - Series motor - Google Patents

Abstract

PURPOSE:To protect surely the coil of a rotor, by molding its core whereon the coil is wound and both ends of the coil with a molding resin, and by covering their surfaces with the molding resin. CONSTITUTION:In a rotor 10, the surface of a core 12 wound with a coil 14, the surfaces of both coil ends 15 and the front end surface of a commutator 18 are covered with a molding resin. Therefore, since all the parts of the coil 14 to be exposed to the outside are covered with the molding resin, the coil 14 can be protected completely, and in its turn, the generations of such faults of the rotor 10 as its flawing and the sticking of the brush particles to it can be prevented.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotor of a series motor.

[0002]

2. Description of the Related Art In a series motor, a permanent magnet is used for a stator and a coil is wound around a rotor.

Therefore, in a series motor having a high rotation speed, a varnish treatment is applied to the coil end of the rotor and the surface of the iron core around which the coil is wound to protect the coil.

However, if the surface of the rotor is simply varnished, the motor may be defective due to swelling of the coil, damage to the coil, and scraps caused by contact with the brush.

Therefore, the present invention provides a series motor capable of reliably protecting the rotor coil.

[0006]

In a rotor of a series motor, a series motor of the present invention comprises an iron core around which a coil is wound, and an iron core around which a coil is wound by molding both coil ends with a molding resin. The surfaces of both coil ends are covered with a mold resin.

[0007]

[Operation] In the series motor of the present invention, since both coil ends and the iron core around which the coil is wound are covered with the mold resin, the coil is not damaged and the motor is not defective.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIG.

FIG. 1 is a side view of a rotor 10 of a series motor.

Reference numeral 12 is an iron core around which the coil 14 is wound, whereby coil ends 15 and 15 are formed in the front and rear portions of the iron core 12.

Reference numeral 16 is a shaft, and reference numeral 18
Is a commutator.

Then, the iron core 12 around which the coil 14 is wound,
The front ends of the coil ends 15 and the commutator 18 are covered with a molding resin. The mold resin has a thickness of about 2-3 mm.

With the rotor 10 having the above-described structure, the coil 1
Since all the exposed portions of 4 are covered with the mold resin, the coil is not scratched or has a brush residue, so that the rotor 10 is not defective.

[0014]

As described above, according to the series motor of the present invention, since the surface of the rotor is covered with the mold resin, the coil is not scratched and a defect due to the attachment of brush residue does not occur.

[Brief description of drawings]

FIG. 1 is a side view of a rotor of a series motor showing an embodiment of the present invention.

[Explanation of symbols]

 10 rotor 12 iron core 14 coil 15 coil end 16 shaft 18 commutator 20 coil end

Claims (1)

[Claims] 1. In a rotor of a series motor, a coil-wound iron core and both coil ends are molded with a molding resin, and the surfaces of the coil-wound iron core and both coil ends are covered with a molding resin. Series motor characterized by the following.