Power-assisted bicycle driven by lithium battery

Abstract

The invention relates to a power-assisted bicycle driven by a lithium battery. The power-assisted bicycle comprises a bicycle frame, a central shaft, a rear wheel hub, a motor, a speed reducer, a controller, a sensor and a battery. The power-assisted bicycle is characterized in that: a left rotary thread is arranged on the left side of the rear wheel hub; a flywheel is in threaded connection withthe rear wheel hub; the flywheel is connected with a driving device; and the sensor is arranged on the central shaft. Compared with the conventional electric bicycle driven by a lead-acid battery anda hub motor, the power-assisted bicycle driven by the lithium battery has the advantages that: 40 percent of power is saved; a thrust can be over 150 kg and is increased by 50 percent; the bicycle can climb up a slope of 20 to 30 DEG, and a required current is less than 10 amperes; endurance mileage can reach 60 to 70 km per run; a rotary handle switch is eliminated, the sensor is arranged on thecentral shaft, a pedal crank can be started by riding the bicycle, and assistant power is generated; the speed of the bicycle is changed along with the rotary speed of the crank and is in direct proportion to the rotary change of the crank; and the power-assisted bicycle is steadily started, a buffer effect is achieved during acceleration or deceleration, the speed is less than 25 kg per hour, and the power-assisted bicycle meets the international standard and is safer to ride.

Description

technical field [0001] The invention belongs to bicycles, in particular to a lithium battery-driven power-assisted bicycle. Background technique [0002] Fuel mopeds are mainly divided into two types. One is a two-stroke scooter that looks like an electric motorcycle, and the other is a single-cylinder four-stroke fuel moped. The former uses a relatively simple principle and is small in size, but it is noisy and consumes fuel. And a kind of blue smoke exhaust gas will be discharged due to insufficient combustion during driving, which seriously pollutes the air. The second type of four-stroke doubles the number of times the lever goes back and forth each time the engine works (that is, 4 times), which strengthens the adequacy of gasoline fuel combustion and greatly reduces pollution and noise. The current mopeds basically all belong to the second four-stroke type. [0003] Electric moped refers to the use of batteries as auxiliary energy. On the basis of ordinary bicycles,...

AI Technical Summary

Problems solved by technology

Defects of hub motor electric vehicles using lead-acid batteries: lead-acid waste batteries cannot be destroyed, causing serious environmental pollution and great harm; lead-acid batteries are heavy, and a set of 48V10Ah batteries weighs more than 28 kg. 4-8kg, the frame needs to be strengthened and heavier

The inner ring of the one-way clutch is connected to the hub of the axle through the internal thread, but because the manufacturing precision of the hub of the axle and the one-way clutch is very low, the noise is very loud after high-speed operation. To improve the precision of the hub and the one-way overrunning clutch, is difficult to achieve

therefore cannot be promoted

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