JPS59113738A - Brush for electric machine - Google Patents

Abstract

PURPOSE:To improve the follow-up property of a brush to the surface of a commutator by superposing a plurality of thin and flexible rectangular plates made of conductive metal material. CONSTITUTION:An armature brush body is composed by superposing a plurality of thin longitudinal plates 8 made of electrolytic copper of a conductive material. The side 9 of this brush body is formed to having the same curvature as a commutator or a slip ring. The end the brush body is secured to an energization unit 10 formed of a brass holder and rivets, and lead wirings 13 are connected to the unit 10.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to an electric brush for receiving and supplying power to an electric motor or a generator.

Conventional Structures and Problems There are conventional electric brushes such as graphite brushes and carbon fiber brushes, as shown in FIGS. 1(a) and 1(b). FIG. 1e) is a perspective view of the black brush, in which 1 is black copper, 2 is a commutator surface housing, fc is a sliding portion with the slip ring surface, and 3 is a lead wire. Current electric brushes are graphite 9
However, graphite has the disadvantage of being brittle due to its inherent properties.

The opening in Figure 1 is a perspective view of a carbon fiber brush, 4 is carbon fiber, 6 is a sliding part with the commutator surface or slip ring surface, 6 is a band made of conductive material, and conductive adhesive. The current-carrying portion 7 is a lead wire connected to the current-carrying portion 6, which is bundled with an agent, resin, or the like. In the above configuration, the carbon fiber brush is used for each fiber or for each fiber.
It is possible to bend each strand and follow the commutator surface or slip ring surface to receive and supply power. However, during use of the electric motor, the carbon fibers break and scatter.
It has the disadvantage that it contaminates the commutator section or slip ring section of the electric machine, and also makes it impossible to receive or supply power to the electric machine.

OBJECTS OF THE INVENTION In view of the above-mentioned drawbacks, the present invention provides an electric brush that follows the commutator surface or slip ring surface well and has excellent mechanical strength and electrical properties.

Structure of the Invention The present invention consists of a plurality of flexible thin plates made of a conductive metal material having a constant thickness stacked one on top of the other, one end of which is not fixed to the thin plate, and is used as a sliding part with a commutator or slip ring, and the other The ends may be soldered, spot welded, brazed, with conductive adhesive, or the thin plate may be made with a hole, covered with a holder, or twisted and connected with rivets or screws and nuts made of conductive material. , a current-carrying part coupled to the thin plate, and a 7j IJ coupled to the current-carrying part
The commutator surface 11c follows the slip ring surface well and has high mechanical strength so that it will not be brittle and chipped like a graphite brush or break like a carbon fiber brush. , and has high electrical properties, it has a unique effect.

DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of the present invention will be described with reference to the drawings.

FIG. 2 shows a perspective view of an electric brush in one embodiment of the present invention. In FIG. 2, reference numeral 8 is a rectangular thin plate made of electrolytic copper, which is a conductive material, and has a thickness of 20 μm, a length of 26 circles, and a width of s mm. Approximately 300 of these thin plates are stacked together to form the electric brush body.

Reference numeral 9 denotes a sliding part arranged to have the same curvature as that of the commutator or slip ring, and 10, as shown in FIG. This is a current-carrying part that is connected and fixed by passing a rivet 12 through it. 13V1 is a lead wire connected to the brass holder 11 by soldering.

The operation of the electric brush constructed as above will be explained below using FIG. 4.

FIG. 4 is a sectional view showing the sliding state of the heavy equipment brush of the present invention and the slip ring 14. When the slip ring 14 rotates and the slip ring surface moves, the electrolytic copper thin plate 8 of the electric brush of the present invention is flexible and has elasticity, so the thin plate 8 moves regardless of the height of the surface of the slip ring 14. slides while bending to receive and supply power.

In addition, in the example, the thin plate 8 was made of electrolytic copper, but 4 electric parts 4
It may be gold, silver, aluminum, iron, zinc, or an alloy thereof.

Effects of the Invention As described above, since the electric brush of the present invention is made of a plurality of flexible rectangular thin plates made of a conductive metal material and having a constant thickness stacked together, it can be easily applied regardless of the height of the commutator surface or slip ring surface. It is possible to receive and supply power by sliding smoothly. In addition, it has the advantage that it is not brittle like graphite plank and does not break like carbon fiber, and its practical effects are great.

[Brief explanation of the drawing]

Figure 1 (A) is a perspective view of a conventional graphite brush, and Figure 1 (B) is a perspective view of a conventional graphite brush.
2 is a perspective view of a carbon fiber brush, FIG. 2 is a perspective view of an electric brush according to an embodiment of the present invention, FIG. 3 is a sectional view of the electric brush, and FIG. 4 is a schematic diagram of the electric brush in a sliding state. FIG. 1...graphite, 2...sliding part, 3...lead wire, 4...carbon fiber, 6...
・Electricity carrying part, 8...Electrolytic copper thin plate, 10 peaks, Electrification part, 11...Brass film pordada-112...
・・Aluminum rivets), 14・・Gun・Slip ring.

Claims (1)

[Claims] Consisting of a plurality of flexible thin plates of a certain thickness made of a conductive metal material, a conductive part made by bonding these thin plates, and a lead wire coupled to the conductive part, one end of the thin plates is fixed and fixed. Instead, the sliding part with the commutator or slip ring,
The other end is soldered, spot welded, pressure welded, brazed,
An electric brush in which a conductive part is formed by using a conductive adhesive or by making a hole in the thin plate and covering it with a holder, or by connecting it with a rivet or screw and nut made of conductive material.