Drive unit for electric bicycles
A technology of electric bicycles and drive units, which is applied in the direction of rider drive, vehicle components, vehicle gearboxes, etc., to achieve the effect of maintenance-free and light maintenance
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[0023] In these embodiments, a 2-gear speed reducer is used. For simplicity, all components in the figure are shown in plan view.
[0024] The pedal force of the drive unit is transmitted via the crank arms 1a and 1b to the crankshaft 2 mounted in the housing. A spur gear integrated into the crankshaft drives the planetary carrier 3 with spur gear toothing of the planetary gears mounted on the shaft 19 . The planet carrier 3 and the planet gears 5 are connected by means of the shaft 4 in order to transmit the force to the ring gear 8 .
[0025] The output drive is realized through the hollow gear 8 . The sun gear 6 is connected to the sleeve 7 and is rotatably mounted on a shaft 19 . The torque generated on the sleeve 7 is proportional to the pedal force and is used to drive the electric motor. Torque measurements can be made by strain gauges, angle encoders or other known direct and indirect methods.
[0026] An additional external spur gear toothing is also installed on...
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