Patent ID: 9718514
Date: 2017-08-01
CPC Classifications: B62M,Y10T

Claim:
1. An electrically assisted bicycle capable of traveling with a combination of a human driving force generated by a pedal force from a pedal and an auxiliary driving force generated by a motor, wherein the electrically assisted bicycle is configured such that a cylindrical human-power transmission member that is disposed on an outer periphery of a crankshaft that receives the human driving force from the pedal, the human-power transmission member receiving the human driving force and having a magneto-striction generation portion of a torque sensor for detecting the human driving force, a combined force member that combines the human driving force transmitted through the human-power transmission member and the auxiliary driving force from the motor, and is disposed on the outer periphery of the crankshaft, a resultant force of the human driving force and the auxiliary driving force that are combined by the combined force member is transmitted to a rear wheel through a human driving force output wheel coaxial with the crankshaft and an endless driving force transmission member looped over the human driving force output wheel, the crankshaft, the human-power transmission member, and the combined force member form a driving force transmission path not including a one-way clutch, the crankshaft being rotated so as to rotate the human-power transmission member and the combined force member accordingly regardless of relative rotation directions of the crankshaft, the human-power transmission member, and the combined force member, the electrically assisted bicycle further comprises a rotation detector that detects stop or a reversed rotation of the pedal, and when the rotation detector detects stop or a reversed rotation of the pedal, the motor is stopped or braked by a control unit.