| 摘要 |
PROBLEM TO BE SOLVED: To provide a motor rotating shaft supporting bearing for actualizing stable drive of a motor over a long period by preventing the deposition of lubricant between a brush and a commutator. SOLUTION: The motor rotating shaft supporting bearings 6, 8 are provided for supporting the rotating shaft of the motor whose rotating shaft 10 is rotated by supplying electric power from the commutator 2 to a rotor 4. In the bearing 6 arranged close to the brush, the lubricant is filled at the counter brush side. In this case, the bearing comprises an inner ring 12 fixed to the rotating shaft, an outer ring 14 opposed to the inner ring, a plurality of rolling elements 16 rollingly incorporated between the inner and outer rings, and sealing plates 18, 20 arranged on the brush side and on the counter brush side, respectively, across the plurality of rolling elements for sealing the inside of the bearing from the outside of the bearing. The lubricant is filled in a space S between the sealing plate 20 on the counter brush side and the plurality of rolling elements. COPYRIGHT: (C)2009,JPO&INPIT
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