| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a bicycle with an auxiliary power unit that improves the positional stability of a detection sensor and inhibits the position of the sensor from being misaligned. <P>SOLUTION: A power-assisted bicycle 10 includes an annular hollow member 72 inserted over an outer periphery of a crankshaft 38 and a one-way clutch 78, disposed on the hollow member 72, for transmitting, when a pedaling torque in a direction in which the power-assisted bicycle 10 travels in a forward direction is applied to the crankshaft 38, the pedaling torque to a rear wheel WR. In the power-assisted bicycle, a magnetic film 84 is formed in a recess 110 disposed in an outer periphery of the hollow member 72, and a magnetostrictive torque sensor 80 is positioned and fixed by a supporting member 82 for supporting the magnetostrictive torque sensor rotatably relative to the annular hollow member 72 at both ends of the recess 110 such that the magnetostrictive torque sensor faces the magnetic film 84 in the recess 110. <P>COPYRIGHT: (C)2012,JPO&INPIT |
