Bicycle assist unit
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United States of America Patent
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Jun 12, 2018
Issued Date -
N/A
app pub date -
Sep 30, 2015
filing date -
Oct 16, 2014
priority date (Note) -
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Abstract
A bicycle assist unit is basically provided with a transmission and an assist motor. The transmission is configured to receive rotation of a crankshaft. The transmission includes a planetary gear mechanism. The planetary gear mechanism includes an output unit, a plurality of ring gears and a rotation restricting mechanism that selectively restricts rotation of the ring gears. The assist motor is configured to output a second drive force that is added to a first drive force that is outputted from the transmission on a power transmission path between the output unit and a front sprocket that is attached to the crankshaft.
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