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A MODULAR AUTOMATIC GEAR SHIFTER FOR A MULTI-SPEED BICYCLE USING ELECTRO-MECHANICAL GADGETS
A MODULAR AUTOMATIC GEAR SHIFTER FOR A MULTI-SPEED BICYCLE USING ELECTRO-MECHANICAL GADGETS
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机译：机电小工具的多速自行车模块化自动换档器
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摘要
This is a modular device that will change the way to drive a bicycle with a multi-speed transmission without any alteration on the latter's original set up. It will perform gear shifting automatically relative to the rhythm of the biker's cadence. There are three major sub-assemblies, namely: 1) the Central Processing Unit (CPU) - the one responsible for logical decisions; 2) the Ml Torque Motor ('M1 Assembly') - the actuator assembly where the encoder is coupled and the shift cable is attached; and 3) the M2 Motor ('M2 Assembly') - the low power dynamo that acts both as cadence sensor and battery charger. This invention can be used virtually in any multi-speed bicycle because of its open loop design. As a proof of its flexibility, it can be programmed to accommodate all cogs or sprockets already in place. There are two position encoders which are ganged together with M1 torque motor for precise clockwise (Cw) and counter-clockwise (Ccw) indexing. The invention permits certain variations depending on the electro-mechanical gadgets to be used. The encoder in M1 Assembly can be anything that acts as a position feedback such as potentiometer, magnetic head and tape, optical, or linear encoders. While the cadence speed sensor of the M2 Assembly can be a hall effect transistor, dynamo or DC motor, infrared or inductive type sensors.
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