Reduction gear unit with rotational position sensor
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United States of America Patent
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N/A
Issued Date -
Dec 6, 2007
app pub date -
Apr 17, 2007
filing date -
Jun 1, 2006
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A gear-equipped motor (1) is configured from a motor unit (2) and a reduction gear unit (4). The reduction gear unit (4) comprises a wave gear device (7) as a reduction gear, an output shaft (8) integrally formed on a cup-shaped flexible outer gear (72) as a reduced-rotation output element, and an absolute sensor (20) for sensing the rotational position of the output shaft (8). The absolute sensor (20) is disposed on a portion of the output shaft (8) supported in a straddle-mounted state by the flexible outer gear (72) and an output-side shaft bearing (12). The absolute sensor (20) can be provided without reducing the moment rigidity of the output shaft (8). Whereby, a reduction gear unit with a rotational position sensor having high moment rigidity can be realized.
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