The invention discloses a motor braking device of an electric bicycle back-pedal brake mechanism. A mechanical part is designed with a middle shaft and a chain disk connecting frame which are in radial clearance rotating fit so that when the back-pedal middle shaft rotates reversely, the middle shaft and the chain disk connecting frame can carry out nonsynchronous relative rotation. A circuit part uses a photoelectric sensor, and the core is a luminophor designed in a camera obscura, a photosensor and a shading component controlled by the mechanical part. When a person pedals a bicycle backwards, the middle shaft drives the chain disc connecting frame to rotate reversely after certain delaying, in the process, a middle shaft shading body in the shading component and a light hole or a gap in a chain disk shading body changed to be overlapped from being staggered so that light rays emitted out by the luminophor can penetrate and be received by the photosensor, and then signals are emitted to brake a motor. Compared with an existing related magnetic induction braking products, the sensitivity and the reliability are high, the motor can be effectively braked, and cogent guarantee is provided for executing of back-pedal braking on the electric bicycle.
Motor braking device of electric bicycle back-pedal brake mechanism
2015-10-14
Patent
Electronic Resource
English
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European Patent Office | 2023
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