JP2522545Y2 - Brush device for motor - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a brush structure for a motor.

[Prior Art] In a conventional brush structure and assembling method, for example, a pair of linear brushes having a relative angle of 90 ° are incorporated into a brush base and then formed in the motor end cap. A pin is inserted into the motor from the small hole, the brush is divided by rotating the motor assembly, and then, after the commutator is assembled, the brush is brought into contact with the commutator by rotating back. Has been done.

[Problem to be Solved by the Invention] However, in this case, when the commutator is arranged in the brush, the brush has a spring property and is restored to the commutator arrangement position. Therefore, the brush is avoided so that the commutator can be inserted. Since the brush separation work is required, the assembling work requires skill, the quality is unstable, and it is necessary to form pin holes and electric angle adjustment holes in the motor end cap, so the spark generated between the brush and the commutator However, there is a drawback that electromagnetic noise leaks.

In view of this point, the present invention aims to simplify the assembly of the brush and the commutator by improving the brush stand structure.

[Means for Solving the Problems] In the present invention, the brush is released from the commutator surface at the time of assembling the brush stand with the brush, and the brush is brought into contact with the commutator surface after assembly. A brush base slidable in the radial direction of the housing is provided, and a brush base fixed so that two metal wire brushes bent inward are disposed adjacent to each other is provided at a position where the center is eccentric with the center of the motor shaft. By assembling and then sliding and fixing the center of the brush base to a position concentric with the center of the shaft, the brush arranged on the brush base is eccentrically installed so that it does not contact the commutator when the brush base is mounted, and the brush base is slid. By moving and fixing at a concentric position, the brush is brought into contact with the commutator.

[Embodiment] Fig. 1 shows an embodiment of the present invention, in which a motor housing 1 is provided.
On the other hand, a brush base 3 slidable in the brush base holder 2 is assembled and mounted on the motor housing 1. When the brush base is assembled, the brush base 3 is made of an Ag-Pd-Au-Pt-Cu alloy. The line brush 4 is made not to abut on the commutator 5, and then the armature commutator part 5 is inserted. FIG. 2 shows the brush device of FIG. 1 viewed from below,
The brush device in which the brush 4 is brought into contact with the commutator 5 by sliding the brush stand 3 in the brush stand holder 2 from (a) to (b) is shown.

[Effects of the Invention] The present invention eliminates the need for a brush dividing operation, stabilizes the assembly operation of the brush and the commutator and the contact state thereof, and eliminates the need for a pin hole in the end cap, so leakage of electromagnetic noise due to sparks Has been reduced.

[Brief description of the drawings]

 FIG. 1 is an assembled perspective view of an embodiment according to the present invention. FIG. 2 is a plan view of an embodiment of the brush device of the present invention. 1: Motor housing, 2: Brush stand holder 3: Brush stand, 4: Metal wire brush 5: Commutator

Claims (1)

(57) [Scope of request for utility model registration] A brush base slidable in a radial direction of a housing is provided for a motor housing, and two brushes bent inward are fixed so as to be arranged adjacent to each other. The brush is brought into contact with the commutator by incorporating the brush at a position eccentric with the center of the motor shaft, and then sliding and fixing the center of the brush stand at a position concentric with the center of the shaft. Brush device.