Rail brush assembly with detent
AssigneeJohnson Electric S.A.
InventorsRui Feng Qin, Ting Tuan Xu
Life of this patent
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Abstract
A rail brush assembly for an electric motor having a commutator, comprises a brush, a spring, a pair of rails and at least one detent for retaining the brush on the rails. The brush has a groove on each of a pair of opposite sides. The rails are disposed in the grooves for guiding the brush to the commutator with the brush being freely slidable along the rails within a predetermined range of motion. The spring is arranged to urge the brush along the rails towards the commutator of the motor and is attached to an end of the brush remote from the commutator. The detent is formed between the spring and at least one rail to limit the range of movement of the brush along the rails.
Claims15
A rail brush assembly for an electric motor having a commutator, comprising:
- a brush, having a groove on each of a pair of opposite sides thereof;
- a pair of rails disposed in the grooves, the brush being guided to the commutator essentially by the rails, the brush being freely slidable along the rails within a predetermined range of motion;
- a spring arranged to urge the brush along the rails towards the commutator, the spring gripping a protuberance formed on an end of the brush remote from the commutator;
- and
- a detent between the spring and at least one rail to limit the range of movement of the brush along the rails under the urging of the spring,
- wherein the spring is a coil spring and the rails extend longitudinally through the spring and the grooves extend through the protuberance.
Dependencies are inferred from the claim text.