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

Abstract

The invention discloses a middle-mounted wheel core driving electric driving automatic speed change system. The system comprises a power input mechanism, a driving wheel, a gear shifting transmissionmechanism arranged on a middle shaft outside the wheel, a middle shaft inside the wheel connected with the middle shaft outside the wheel through a chain transmission assembly, and a speed reduction output mechanism arranged on a wheel mounting shaft, wherein the gear shifting transmission mechanism comprises a single-side synchronizer, an overrunning clutch and a speed reduction assembly. The system is advantaged in that the speed reduction output mechanism is additionally arranged at the wheel core position of the driving wheel, the speed reduction ratio is increased, and therefore a high-speed motor can be adopted for driving, motor efficiency is greatly improved, the endurance mileage is increased, meanwhile, a chain transmission mode is reserved, and acceleration and deceleration impact of the two-wheeled vehicle can be buffered; the distance change between the chain wheels caused by up-and-down oscillation of a suspension system is reduced, two-gear gear shifting can be achieved,the electric two-wheeled vehicle has the high climbing and heavy load capacity, the motor can be located on an efficient platform all the time, and motor efficiency is further improved.

Description

technical field [0001] The invention relates to the technical field of electric drive systems of two-wheel vehicles, in particular to a center-mounted 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 directly drives th...

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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