Wavy friction drive self-adaption automatic gearbox for electric cars

Abstract

The invention discloses a wavy friction drive self-adaption automatic gearbox for electric cars. The gearbox comprises a box, a driving shaft, a slow-gear driving mechanism and a mechanical intelligent self-adaption variable-speed assembly. A wavy friction face friction driving pair is adopted for the friction faces of a drive friction disc and a driven friction disc of the mechanical intelligent self-adaption variable-speed assembly. One end of the driving shaft extends out of the box, and power is transmitted to a car rear axle through an output speed reduction mechanism. The wavy friction drive self-adaption automatic gearbox is of a disengaged and engaged structure by means of the friction discs, has the beneficial effect of flexible response, and is small in axial dimension. Meanwhile, due to embedment of an annular protrusion and an annular groove, with the wavy radial sections, of the friction faces, joint of the friction faces is dispersed, not only the coaxiality of the drive friction disc and the driven friction disc is ensured, but also the friction faces are enlarged, and good driving is maintained on the condition of limited elastic force; and the engagement and disengagement flexibility can be ensured, the driving precision is improved, and the wavy friction drive self-adaption automatic gearbox is suitable for the field of electric cars.

Description

technical field [0001] The invention relates to a motor vehicle transmission, in particular to a wave-shaped friction transmission self-adaptive automatic transmission for an electric vehicle. 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 accelerator pedal depends entirely on the driver's operation, which often causes a mismatch between the operation and the driving conditions, resulting in unstable operation of the motor or engine, and stalling. [0003] When the motor vehicle is operated by the rider without knowing the driving resistance, the speed change device is operated and controlled only based on experience, which inevitably has the following problems: 1. When starting, going uphill a...

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Problems solved by technology

[0006] In view of this, the object of the present invention is to provide an adaptive automatic transmission with wave-shaped friction transmission, which can not only automatically shift gears and change gears without cutting off the driving force according to the change of driving resistance, but also solve the problem of small torque-rotational speed changes. Meet the problems 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 status quo of fast and slow gear engagement, and the long stroke of the axial joint surface of the separation mechanism , the separation and engagement are fast and thorough, which is conducive to improving the transmission accuracy, and the overall shape and position tolerance will still be guaranteed after long-term use, thereby ensuring the stability of the transmission

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