SU978250A1 - Electric machine commutator - Google Patents

Description

(Sk) ELECTRIC MACHINE COLLECTOR

FIELD OF THE INVENTION The invention relates to electrical engineering in connection of the collector of electrical machines.

The known collector of an electric machine, containing a package of plates, the side faces of which are made with inclined walls, the package is fixed in a plastic case l.

The disadvantage of this collector is the low mechanical strength Q, which is a consequence of the unreliable fixing of each plate in the plastic housing.

Also known is the collector of an electric machine, which contains a pack of plates, each of which is fixed in a plastic case by means of SUPPORTS, performed by bending the notch of the groove toward the case 2.20.

This collector possesses reliability as compared to the previously described kiplector, but its mechanical strength is also insufficient for its application in high-speed electric machines. This is due to the fact that under the action of centrifugal force arising from the rotation of the collector at high frequencies, the folded support protrusion is pulled out of the plastic case, since the protrusion is held inside the plastic case only by friction and adhesion forces.

The purpose of the invention is to create a collector with increased reliability and mechanical strength.

The goal is achieved by the fact that in a collector with an insulating body in which each plate is fixed by means of fasteners, the fastener element is made in the form of a loop on the surface of the plate opposite to the working one.

FIG. 1 shows a collector, a longitudinal section; in fig. 2 is a section A-A in FIG. one; in fig. 3 - plate blank (until bending) The collector of the electric machine contains conducting plates 1 with fastening elements 2, made in the form of a loop on the surface of the plate 1 opposite to the working and body 3, made, for example, of plastic, with the plate elements k of the housing 3 isolating Plast.in 1 among themselves. The collector can be made as follows. Plates 1 with supporting protrusions are made from the conductive material by punching or cutting (a hole is drilled in the supporting protrusion so that a loop 2 is formed, the plates are placed in an assembly tool and pressed with plastic so that it flows inside the loops and between the plates. With another In the manufacturing method (Fig. 3), the plates 1 are cut out of the profiled current-conducting material so that there are bridges between the end surfaces of the plates, 25

then the workpieces are bent in bridges at 180 ° C at once or in several transitions, depending on the specific construction), loops 2 — fixing elements — are then formed, then the plates are pressurized with plastic and the working face of the collector (end face) or

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Sources of information taken into account in the examination

1. Author's certificate of the USSR 30 No. 571850, cl. H 01 R Ze / O, 1976.

2. The author's certificate of the USSR If L 1326, cl. H 01 R 3 / 06,1968

Claims (1)

, (prototype). non-working end surface of the collector (cylindrical). This method of manufacturing plate 1 consists of two symmetrical halves interconnected by a fastening element - loop 2. The proposed collector has, in comparison with the known, increased reliability and durability due to the features of the fastening element, and has a low labor intensity of manufacture. Claims of an electric machine comprising conductive plates fixed by means of a fastener element in an insulating housing, characterized in that, in order to increase reliability and mechanical strength, the fastener element is designed as a loop on the surface of the plate opposite to