Patent ID: 7273123
Filing Date: 2007-09-25
Classification: B62M

Abstract:
1. An electric bicycle power structure comprising a motor, a power exchange device and pedal interlocking shafts; being capable of assisting an electric bicycle to produce power by one of the motor and the pedal interlocking shafts, and automatically switching between the motor and the pedal interlocking shafts for achieving power saving effects and offering enhanced usage conveniences; and characterized that, the motor has a hollow tube forming an axis, which is provided with a gear at an appropriate position at a front end of the hollow tube; the power exchange device has a planet decelerating mechanism, a clutch and a chain wheel cover, and is connected to an interior of the planet decelerating mechanism having a front end thereof disposed with the clutch; the gear on the hollow shaft of the motor is pivotally disposed to a center of the planet decelerating mechanism to connect with an interior of the planet decelerating mechanism; the planet decelerating mechanism has a protruding central gear disposed at a front end thereof and also pivotally at a center of the clutch; and the chain wheel cover is provided with a plurality of teeth at an outer wall thereof; and the pedal interlocking shafts have a central axis, outer covers at two sides thereof, and a joining cover; the central axis is rotatable disposed at the center of the axis of the motor; the outer covers are disposed with roller bearings at interiors thereof, such that two ends of the axis of the motor are respectively positioned in the roller bearings, while the central axis of the pedal interlocking shafts are inserted into the hollow tube without coming into contact with the hollow tube; a position where a pedal interlocking shaft at one side joins with the chain wheel cover is provided with the joining cover; the joining cover is disposed with a one-directional axis at an interior thereof, and has a front end thereof accommodated by an inner wall of the cover of the pedal interlocking shaft, and a rear end thereof fastened in the chain wheel cover.