JPH0617366U - Brush for motor - Google Patents

Abstract

(57) [Summary] [Purpose] To prevent the pick tail from being caught in the coil spring when the brush is attached to the brush holder. [Structure] A brush 11, a coil spring 12 having one end attached to the brush 11, a plate-shaped spring fastener 13 having a through hole provided at the center and the other end of the coil spring 12, and one end having the brush 11
And a plate-shaped picktail fastener 16 to which the projecting end of the picktail 15 is attached, the picktail 15 being attached to the spring fastener 13 and penetrating through the through hole 14 provided in the spring fastener 13 and projecting to the opposite side. A brush for a motor, which is made of

Description

[Detailed description of the device]

[0001]

This invention relates to a brush for a motor. More specifically, it concerns a DC (direct current) servomotor.

[0002]

2. Description of the Related Art A DC servo motor is used in a robot or the like, and it has a rotor surface 52 of a rotor 51 and a brush 53 that contacts the rotor surface 52 as shown in FIGS. Have. The brush 53 is attached to the stopper 54 by a pick tail 55 that attaches one end to the bottom and the other end to the plate-shaped stopper 54. Further, a spring 56 that spirally winds around the pick tail 55 is attached between the bottom of the brush 53 and the stopper fitting 54.

When the brush 53 is attached so as to come into contact with the rotor 51, the brush 53 to which the stopper 54, the pick tail 55, and the spring 56 are attached is placed in a brush holder 57 having a square hole. Insert at the beginning. Then, the cap 58 is attached to the bottom of the fastener 54, and is pressed through the O-ring.

[0004]

However, in the motor brush shown in FIGS. 6 and 7, when the brush 53 is set in the brush holder 57 as shown in FIG. 7, the pick tail 55 has the spring 56. Had the problem of being bitten by.

[0005]

[Means for Solving the Problems]

[0006] A brush, a coil spring having one end attached to the brush, a plate-like spring retainer having a through hole in the center and the other end of the coil spring attached, and one end attached to the brush, For a motor characterized by a pick tail that penetrates through a through hole provided in the spring fastener and projects to the opposite side, and a plate-shaped pick tail fastener to which the projecting end of the pick tail is attached. brush,

Providing

[0008]

[Operation] In advance, pull the pick tail fastener and insert the brush into the brush holder with the brush at the head while compressing the spring between the spring fastener and the brush. After inserting the brush, release the pull on the pick tail retainer and put the pick tail in the spring.

When the brush is inserted, since the coil spring is compressed, there is no gap, and the pick tail is not sandwiched by the coil spring.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described with reference to FIG. 1, which shows a front view, and FIG. 2, FIG. 3, FIG. 4, and FIG.

Reference numeral 11 is a brush. As shown in FIG. 1, the brush 11 is substantially cubic and has a curved contact surface with the rotor 21. The brush 11 is made of graphite or carbon.

Reference numeral 12 is a coil spring. One end of the coil spring 12 is attached to the brush 11. 13 is a spring fastener. In this embodiment, the spring retainer 13 has a plate-like shape in which the central portion is curved toward the brush 11, and the through hole 14 is provided in the central portion. The other end of the coil spring is attached to the side of the brush 11 of the spring retainer 13.

Reference numeral 15 is a pick tail. One end of the pick tail 15 is attached to the brush 11, and penetrates a through hole provided in the spring fastener 13 to project on the opposite side.

Reference numeral 16 is a pick tail fastener. The pick tail retainer 16 is plate-shaped in this embodiment, and has a dish shape in which the brush 11 side is dented in the central portion, and the protruding end of the pick tail is attached to the surface on the brush 11 side. Reference numeral 22 is a brush holder provided in the shape of a square hole toward the rotor 21. 23 is a cap and 24 is an O-ring.

Next, the operation of the embodiment will be described. As shown in FIG. 2, the pick tail fastener 16 is pulled in advance to compress the spring 12 between the spring fastener 13 and the brush 11, while the brush 11 is moved to the brush holder as shown in FIG. Insert the brush 11 into the -22 with the brush 11 at the top. After inserting the brush 11, the pulling of the picktail fastener 16 as shown in FIG. 4 is released, and the picktail 15 is stored in the spring 12.

Since the coil spring 12 is compressed when the brush 11 is inserted, there is no gap, and the pick tail 15 is not sandwiched by the coil spring 12. Then, the cap 23 is tightened and the brush 11 is brought into contact with the rotor 21 to energize it.

[0017]

Therefore, in this invention, the pick tail is not caught in the coil spring when the brush is mounted on the brush holder.

[Brief description of drawings]

FIG. 1 is a front view of an embodiment of the present invention.

FIG. 2 is a central sectional view of the embodiment of the present invention in use.

FIG. 3 is a central sectional view of an embodiment of the present invention in use.

FIG. 4 is a central sectional view of an embodiment of the present invention in use.

FIG. 5 is a central sectional view of the embodiment of the present invention in use.

FIG. 6 is a front view of a conventional example.

FIG. 7 is a central cross-sectional view of a conventional example in use.

[Explanation of symbols]

 11 Brush 12 Coil Spring 13 Spring Fastener 14 Through Hole 15 Pick Tail 16 Pick Tail Fastener

Claims (1)

[Scope of utility model registration request] 1. A brush, a coil spring having one end attached to the brush, a plate-shaped spring retainer having a through hole in the center and the other end attached to the coil spring, and one end attached to the brush. A motor comprising a pick tail that penetrates through a through hole provided in the spring fastener and projects to the opposite side, and a plate-shaped pick tail fastener to which the projecting end of the pick tail is attached brush.