Patent ID: 9434446
Filing Date: 2016-09-06
CPC Classification: B62M,F16C,Y10T

Claim Text:
1. An electric bicycle that can be driven by adding an auxiliary driving force generated by an electric motor to a human driving force generated by a pedal force from a pedal, the electric bicycle comprising: a torque sensor that detects a force corresponding to a pedal force with a crankshaft rotatably disposed in a hanger coupled to a lower end of a vertical pipe, wherein the crankshaft is divided into a crankshaft body on a periphery of which the torque sensor is disposed, and an auxiliary crankshaft connected to one side of the crankshaft body, a diameter of a joining section between the auxiliary crankshaft and a crank arm and a diameter of a joining section between the crankshaft body and the crank arm are larger than a diameter of a connecting section between the crankshaft body and the auxiliary crankshaft, a point of the crankshaft body near a joining section between the crankshaft body and the auxiliary crankshaft is rotatably supported by a bearing, a wire guide member is disposed between the bearing and a metallic inner cylinder disposed in the hanger, and the torque sensor is connected to a torque sensor connecting wire that is laterally extended out of the hanger through the wire guide member.