JPH0140301Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a brush holding device for holding brushes of a rotating electrical machine such as an electric motor.

[Prior Art] As shown in FIG. 4, a brush holding device used in a conventional DC machine, etc. has a hole 1 into which a rotating shaft of a rotating electrical machine is inserted, and is used to hold a stator of a rotating electrical machine. The brush holding plate 2 fixed to the brush holding plate 2 and the brush holder 3 holding the brush are integrally molded from synthetic resin, and a brush (not shown) is held in the brush holding portion 3a of the holder 3. ing.

[Problems to be solved by the invention] However, in this type of conventional brush holding device, when the brush generates heat, the synthetic resin brush holder 3 is deformed by the heat, and the brush holding portion 3a of the holder contracts. As a result, the brush could no longer move within the brush holding portion 3a, and the brush could no longer come into contact with the rotating shaft, resulting in failure of energization.

An object of the present invention is to provide a brush holding device for a rotating electric machine that is capable of holding brushes in a state where they can move smoothly at all times, and also cooling a brush holder efficiently. .

[Means for Solving the Problems] The present invention includes a synthetic resin brush holding plate having a hole into which a rotating shaft of a rotating electric machine is inserted, and a mounting portion having a gap into which the brush holding plate can be inserted. a metal brush holder that is integrally provided with a brush holding part that holds a brush and is attached to the brush holding plate with the brush holding plate engaged in the mounting part, the mounting part of the brush holder; A heat dissipation plate portion is integrally formed in the.

[Function] With the above configuration, since the brush holder is made of metal, the brush holder does not deform as in the conventional case even if the brush generates heat. Therefore, the brush can always be held in a state where it can move smoothly relative to the brush holder, and poor contact of the brush will not occur. Moreover, since the heat sink part is provided at the mounting part of the brush holder, it is possible to prevent the temperature of the brush holding plate that holds the brush holder from rising, and it is possible to efficiently cool the brush holder.

[Embodiments] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

In FIGS. 1 to 3, reference numeral 11 denotes a synthetic resin brush plate that is attached to the stator of a rotating electrical machine such as an electric motor and has a hole 12 in the center into which a rotating shaft of the rotating electrical machine is inserted. This brush plate 11 has a pair of duct-shaped holder holding parts 13, 13 whose openings face each other with the hole 12 in the center.
is formed, and a brush holder, which will be described later, is positioned and held within this holder holding part 13. 14 is positioned and held within each holder holding part 13 of the brush plate 11 to hold the brush plate 1.
This brush holder 14 includes a brush holder 15 for holding a brush (not shown) and a brush holder 15 for attaching the brush holder 14 to the brush plate.
and a mounting portion 16 forming a gap S therebetween. One end of the brush holder 15 facing the hole 12 of the brush plate 11 is formed into a curved shape to match the shape of a brush (not shown), and the other end of the brush holder 15 is open for drawing out lead wires and the like. There is. The mounting portion 16 includes a U-shaped portion 17 integrally formed with the brush holding portion 15 and a heat dissipation plate portion 18 continuous with the U-shaped portion 17 and parallel to the bottom of the brush holding portion 15. Both ends of the heat dissipating plate portion 18 are formed in a shape that extends long in a direction perpendicular to the direction in which the brush holding portions 15, 15 face each other.

In the above embodiment, the brush holder 14 is positioned and fixed to the brush holding plate 11 by inserting the attachment part 16 of the brush holder 14 into the holder holding parts 13, 13 of the brush plate 11. In the brush holding mechanism of the present invention, since the brush holder 14 is made of metal, the brush will not be deformed even if it generates heat, and the brush can be moved relative to the brush holding part 15 of the brush holder 14. Moreover, since the area of the heat sink portion 18 of the brush holder 14 is large, even if the brush generates heat, it can be efficiently cooled by the heat sink portion 18.

[Effects of the Invention] As described above, according to the present invention, since the brush holder is made of metal, the brush holder does not deform as in the conventional case even when the brush generates heat. Therefore, the brush can always be held in a state where it can move smoothly relative to the brush holder, and there is an advantage that poor contact of the brush does not occur. In addition, since a heat dissipation plate part is provided at the attachment part of the brush holder,
This has the advantage that the temperature of the brush holding plate that holds the brush holder can be prevented from rising, and the brush holder can be efficiently cooled.

[Brief explanation of the drawing]

1A and 1B are a plan view and a side view of an embodiment of the present invention, FIG. 2 is a plan view of a brush plate according to the present invention, and FIGS. The side view and FIG. 4 are perspective views of a conventional brush holding mechanism. 11... Brush plate, 12... Hole, 14...
...Brush holder, 15...Brush holding part, 16...
...Mounting part, 18... Heat sink part.

Claims (1)

[Scope of utility model registration request] A brush holding plate made of synthetic resin having a hole into which a rotating shaft of a rotating electrical machine is inserted, a mounting part having a gap into which the brush holding plate can be inserted, and a brush holding part holding the brush are integrally provided. and a metal brush holder that is attached to the brush holding plate with the brush holding plate engaged in the mounting part, and the brush holder mounting part integrally includes a heat sink part. Brush holding device for rotating electric machines.