Twin brush with bearing plate

Abstract

A brush device (1) comprising: a first (11) and a second (12) flange disposed side by side, each flange extending radially between a rubbing face intended to rub against a moveable element and a flange head (71, 72) intended to be connected electrically to another moveable element, a first plate (41) rigidly fixed to the first flange only and extending tangentially above the head of the second flange, in such a way as to transmit, when this first plate is loaded by pressure means, pressure forces on the second flange, a second plate (42), distinct from the first plate, rigidly fixed to the second flange only and extending tangentially above the head of the first flange in such a way as to bear on said first flange in the event of relative motion of the second flange with respect to the first flange towards the first moveable element.

Description

technical field

[0001] The invention relates to the field of brushes for providing electrical contact between stationary parts / elements and rotating parts / elements in rotating electric machines. The rotating part may for example be a commutator part of an electric motor or a slip ring of a synchronous or asynchronous motor.

[0002] More precisely, the invention relates to brushes for electric machines, and more particularly to split brushes. Background technique

[0003] It is known to assemble several blades, usually graphite based, side by side to limit sparking and vibration effects, especially when the element used to slide relative to the brushes comprises a plurality of commutator bars, each blade having an associated potential and tolerate defects in misalignment of the strips with respect to each other. Therefore, providing several blades can thus achieve a better contact even in the case of surface defects.

[0004] Thus, a split-lobe brush comprises two blades ...

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