| 摘要 |
PURPOSE:To obtain a suitable rotational output with a simple construction by arranging an elastic contractible member on an outer periphery of a rotary drum, securing both ends thereof to a holding arm and the outer periphery of the rotary drum, respectively, and connecting an output shaft to an inner portion of the rotary drum through a series of gears. CONSTITUTION:An elastic contractible member 3 is arranged on the outer periphery of a rotary drum 2 supported on a hoding rod 1 through a bearing, both ends thereof are fixed to the outer periphery of the rotary drum 2 and a holding arm 11 connected to the holding rod 1, respectively, and an output shaft 4 coaxially supported inside the rotary drum 2 is conneted to the rotary drum 2 through a series of gears 5, 20 and 23, whereby the output shaft 4 can be rotated by supplying fluid into the elastic contractible member 3 and exhausting it from the elastic contractible member 3. Therefore, a suitable rotational output can be obtained with a simple construction.
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