Middle-mounted chain transmission wheel core drive electric drive automatic speed change system

Abstract

The invention discloses a middle chain transmission wheel core drive electric drive automatic speed change system. The system comprises a power input mechanism, a driving wheel, a speed reduction input mechanism, a wheel mounting shaft, a gear shifting transmission mechanism and a power output part, wherein the speed reduction input mechanism is arranged on an intermediate shaft outside the wheel,the gear shifting transmission mechanism and a power output part are arranged on the wheel mounting shaft, and the gearshift transmission mechanism comprises a double side synchronizer and a reduction component, a bilateral synchronizer can be combined with a power output component or a speed reduction assembly. The system is advantaged in that the reduction ratio is increased, so a high-speed motor can be adopted for driving, motor efficiency is improved, the endurance mileage is increased, meanwhile, a chain transmission mode is reserved, the acceleration and deceleration impact of the two-wheeled vehicle can be buffered, the distance change between chain wheels caused by up-and-down oscillation of a suspension system is reduced, and two-gear shifting can be realized; the electric two-wheeled vehicle has strong climbing and heavy load capacities, and the motor can be always located on the efficient platform.

Description

technical field [0001] The invention relates to the technical field of electric drive systems for two-wheeled vehicles, in particular to a mid-mounted chain transmission wheel core drive electric drive automatic transmission system. Background technique [0002] The design structure of the chain drive has the advantages of simple structure, light weight, low cost, etc., and the advantage that the final reduction ratio can be easily changed by replacing the sprocket, so it is adopted by most two-wheeled vehicles. In addition, the chain can buffer the impact of acceleration and deceleration of the vehicle, and can also reduce the change in the distance between the sprockets caused by the up and down vibration of the suspension system. [0003] The existing two-wheeled electric drive system capable of shifting gears usually sets the power input mechanism (motor, etc.) and the deceleration and shifting mechanism in the middle of the two-wheeled vehicle (below the seat), and then...

AI Technical Summary

Problems solved by technology

Since the speed of the motor is much higher than that of the internal combustion engine, the reduction mechanism is relatively complicated and the volume is large

However, due to the structural characteristics of the two-wheeled vehicle, the installation space is extremely limited, and it is difficult to install a deceleration and shifting mechanism with a large reduction ratio. Therefore, it is impossible to use a high-speed motor, and the efficiency of the motor is always not ideal, which affects the cruising range.

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