| 摘要 |
PURPOSE:To prevent a brush and a commutator from being abraded due to consumption and welding, and prevent the span of life of a motor from being shortened due to mechanical abrasion, by keeping a motor case interior in the atmosphere of organic chemical vapor. CONSTITUTION:A brush sliding section 3 extended from a brush base 2 comes in contact with a commutator segment in a pressed state. In the meantime, the commutator segment is rotated along with the rotation of a motor, and from a contact section between both, electric spark is generated. In this case, when organic chemicals are set to be sealed in a polyethylene pack 16, then the chemicals are adsorbed on the surfaces of the brush and the commutator segment, and so the sliding contact surface can be prevented from being abnor mally abraded and from being welded and abraded due to the welding, because of lubricating action. Both surfaces are protected by the films of the chemicals, and melano-substance is scarcely produced, and the surfaces can be prevented from coming in poor contact with each other.
|
