The invention discloses a torque and speed sensor of an electric bicycle. The torque and speed sensor comprises a chain wheel, a crank and a transformation frame, wherein the transformation frame is composed of an outer ring, an inner ring and a plurality of connecting ribs distributed in a radial mode and connected between the outer ring and the inner ring. The outer ring and the inner ring are coaxially arranged, the inner ring is fixed to the crank, the outer ring is fixed to the chain wheel, a resistance strain gauge is fixed to the opposite inner sides of any two adjacent connecting ribs respectively, lead pins of the resistance strain gauges are both welded on a signal output plate, and the signal output plate is fixed to the transformation frame. The torque and speed sensor further comprises a moving seat and a stationary seat which are coaxial with the transformation frame, wherein the moving seat is connected to the transformation frame, and a secondary side winding is fixed to the moving seat. The stationary seat is connected to the moving seat and can rotate around the central axis of the moving seat, a primary side winding and a signal receiving plate are fixed to the stationary seat, the primary side winding and the secondary side winding jointly form an isolation transformer, the primary side winding is electrically connected with an alternating-current power generator arranged on the signal receiving plate, a leading-out line is arranged on the signal receiving plate, and the secondary side winding is electrically connected with a signal output plate. The torque and speed sensor is simple in structure, stable in performance and high in sensitivity.
Torque and speed sensor of electric bicycle
2015-07-01
Patent
Electronic Resource
English
IPC: | B62M RIDER PROPULSION OF WHEELED VEHICLES OR SLEDGES , Antrieb von Radfahrzeugen oder Schlitten durch den Fahrer |
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