Waveform friction transmission self-adaption automatic speed change drive assembly of external rotor electric machine of electric motorcycle

Abstract

The invention discloses a waveform friction transmission self-adaption automatic speed change drive assembly of an external rotor electric machine of an electric motorcycle. The assembly comprises the external rotor electric machine, a box and a transmission shaft, and further comprises a slow gear transmission mechanism and a mechanical intelligent self-adaption speed change assembly arranged on the transmission shaft, wherein a friction surface of a driving friction disc of the mechanical intelligent self-adaption speed change assembly and a friction surface of a driven friction disc adopt a waveform friction surface friction transmission pair. The assembly adopts the friction discs to form a separation and combination structure, has the advantage of response sensitivity, and is smaller in axial size; meanwhile, the assembly adopts a structure of embedding an annular projection and an annular groove, having wave-shaped radial sections, of the friction surfaces to scatter the joint of the friction surfaces, so that the coaxiality of the driving friction disc and the driven friction disc is guaranteed, the friction surfaces are increased, and excellent transmission is kept under the condition of limited elastic force; and the assembly facilitates to guarantee the separation and combination sensitivity, improves the transmission precision, and is suitable for the field of electric vehicles.

Description

technical field [0001] The invention relates to a motor vehicle transmission, in particular to an electric motorcycle outer rotor motor wave-shaped friction transmission self-adaptive automatic variable speed drive assembly. Background technique [0002] In the prior art, automobiles, motorcycles, and electric bicycles basically directly control the throttle or current control speed through a speed control handle or an accelerator pedal, or use a manual mechanical automatic transmission mechanism to realize speed change. The operation of the handle or the accelerator pedal depends entirely on the operation of the driver, which often results in a mismatch between the operation and the driving conditions, resulting in unstable operation of the motor and stalling. [0003] In motor vehicles, when the rider does not know the driving resistance, the speed change device is only operated and controlled based on experience, which inevitably has the following problems: 1. When starti...

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Problems solved by technology

[0006] In view of this, the purpose of the present invention is to provide a side-mounted self-adaptive automatic transmission with wave-shaped friction transmission, which can not only adapt to the change of driving resistance without cutting off the driving force, but also automatically shift and change gears, and solve the problem of torque-rotational speed. Small changes cannot meet the problem of road use under complex conditions; long-term operation can still ensure stable support, reduce operating noise, ensure operating comfort and improve transmission efficiency, thereby reducing energy consumption; change the stroke of the axial joint surface of the fast and slow gear engagement and separation mechanism In the long-term current situation, the separation and engagement are fast and thorough, which is conducive to improving the transmission accuracy. After a long period of use, the overall shape and position tolerance will still be guaranteed, thereby ensuring the stability of the transmission.

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