SU1698924A1 - Brush holder - Google Patents

Abstract

The invention relates to electrical engineering, namely, brush holders for electric machines. The aim of the invention is to improve the manufacturability, reliability and serviceability. A recess 3 is formed in the housing 1 of the brush holder. A plate 7 on which a coil spring 6 is fastened is inserted into the gap between the brush and the recess 3. On the plate 7, projections are made and a link 14 is installed to fix the plate on the body of the brush holder. 3 il.

Description

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The invention relates to electrical engineering, in particular to brush holders of contact nodes of electric machines with a phase rotor, DC machines and synchronous machines.

The purpose of the invention is to improve the manufacturability, reliability and ease of maintenance.

FIG. 1 shows schematically the device, a general view; in fig. 2 - brush holder housing; in fig. 3 - plate with coil spring.

8, housing 1, on one of the walls delimiting the brush 2, is a step-like recess 3, open at the ends, forming a protrusion 4 from the outside, passing down into the window 5 for the spring stroke b, ending with the wall of the housing.

The recess 3 and the window 5 in the housing are made in such a way that the narrow part of the plate 7, bounded by the side recesses 8 of the pressure mechanism, enters the gap between the brush 2 and the ledges 9 of the recess 3 and leaves the lower part 10 on the outer wall 11, Set parallel to the housing wall.

The side parallel recesses 8 on the plate 7 form protrusions 12, which transition into the wide part of the plate, on which the roll spring 6 is located on the opposite side, and is attached to the eyelet 13, trapezoidal or rectangular shackle 14, which deviates freely from the plate. On the inner side of the earring on the base 15 there is a protrusion 16, symmetrically located relative to the side walls.

The pressing mechanism is inserted into the housing 1 with a brush 2 in the gap between the brush and the recess 3 with the lower part 10 coming out through the window 5 onto the outer wall 11. Then the earring 14 is driven over the ledge 4 on the housing to failure and, reducing the pressure on the plate 7 in axial direction, the shackle engages with its base and the protrusion 16 in engagement with the protrusion 4 on the body. The protrusion 16, zayd in the recess 3, locks the earring from accidental disengagement from the protrusion 4.

The operating spring 6 of the pressure mechanism presses on the brush 2, creating a reaction of the supports of the plate 7 against the housing 1. In the upper part of the housing, the plate rests on the ledges 9 and the lower end of the protrusion 4 by means of an earring 14, and in the lower part of the housing on as a result, the pressure mechanism is fixed in the brush holder housing when the spring is pressed on the brush.

In the event of the spring 6 coming out of operation, lowering the plate 7 towards the collector

limited by the projections 12 of the body of the brush holder, and the output in the opposite direction - an earring 14.

The assembled brush holder works as follows.

The working spring 6 presses on the brush 2, as a result of the reaction of the supports of the plate 7 to the housing 1. In the upper part of the plate 7 is supported on the ledge of the recess and the end of the depression with the help of the earring 14. At the bottom

part of the plate 7 is supported on the outer wall of the housing 1. As a result, the coil spring assembly is fixed relative to the housing 1, and the plate 7, along which the spring 6 rolls, is installed parallel to the longitudinal axis of movement of the brush 2. The inner lug of the earring 7, which engages with the housing 1, stops it. from disengagement from housing 1.

To remove the coil spring assembly

from the housing 1, it is enough to press in the axial direction on the plate 7, withdraw the link 14 from the engagement with the housing 1 and remove it from the housing. The assembly is carried out in reverse order.

Technical and economic efficiency

the brush holder is provided by simplifying the design, by saving spring steel, reducing labor intensity in production, increasing reliability and

Claims (1)

service convenience in operation. Brush holder comprising a case in which a plate with a coil spring fixed on it is installed, the plate is made with side recesses forming restrictive protrusions, characterized in that, in order to improve processability, reliability and ease of maintenance, the wall holder interacts with plate, made a window, conjugate with the tide, made in the upper part of this wall, the inner surface of the tide has a stepped shape, the side notches of the plate are made on the length, p the height of the body, the plate is mounted at high tide with a support in the upper part on its walls, and the lower part of the plate rests on the lower wall of the body, the plate provides the earring installed in its upper part with a turn, on the basis of the earring a protrusion is made that enters in engagement with the lower end of the tide. // 2 eight 7