| 摘要 |
PROBLEM TO BE SOLVED: To provide a motor that prevents misalignment between an armature shaft and a worm shaft. SOLUTION: The armature shaft 17 of an armature 16 is pivotally supported by an armature side bearing 14b. A plurality of feed brushes 22 are arranged on the outer circumference of a commutator 20 fixed to the armature shaft 17, and each feed brush 22 is urged toward the commutator 20 by means of a torsion coil spring. A reduction gear mechanism 32 which slows down rotation of the armature shaft 17 has a worm shaft 35 connected to the armature shaft 17 to rotate together, and the worm shaft 35 is pivotally supported by a worm side bearing 34a. The armature side bearing 14b is arranged so that the central axis L7 is offset from the central axis L2 of the worm side bearing 34a in the direction opposite to the radial component F3 of resultant force of the plurality of feed brushes 22 which press the commutator 20. COPYRIGHT: (C)2011,JPO&INPIT |
