| 摘要 |
PROBLEM TO BE SOLVED: To suppress the noise, vibration, and breakage of a component caused by the fluctuation of a load in a power tool, which electrically or pneumatically or hydraulically is driven, and transmits power to an output section via a reduction gear. SOLUTION: A crank shaft 26 is provided with a ring member 40 fitted by a key 44 or press fitting. The ring member 40 is provided with a plurality of pins 40c fixed. Cushioning members 41 are installed on external peripheries of the pins 40c. Rotatably supporting members 42 are installed on external peripheries of sleeves 40b integrated with the ring member 40. A reduction gear 43 is installed on the ring member 40 via the cushioning members 41 and rotatably supporting members 42. COPYRIGHT: (C)2003,JPO
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