Speed changing device of electric car and gear shifting assembly

Abstract

The invention discloses a speed changing device of an electric car. The speed changing device of the electric car comprises a case body, a power input member, a gear shifting assembly, a power output member and a transmission assembly. The power input member comprises an input shaft, a first driving gear and a second driving gear, wherein the input shaft is rotatably arranged in the case body through a corresponding bearing, one end of the input shaft extends out of the case body, and the first driving gear and the second driving gear are arranged on the input shaft sequentially from right to left and driven by the input shaft. The transmission assembly comprises a first transmission gear and a second transmission gear. The gear shifting assembly comprises a spline shaft, a clutch member, an electromagnet, a round pin and a spring. The working position of the clutch member of the gear shifting assembly can be changed by arranging an ejector rod, the round pin and the spring in the spinle shaft. Therefore, inside space of the speed changing device is greatly saved, volume and weight of the speed changing device can be reduced, and energy consumption when the electric car is reduced.

Description

Technical field [0001] The invention relates to a transmission, in particular to a transmission device and a shift assembly of an electric tricycle. Background technique [0002] Electric tricycles have the characteristics of flexibility and low cost of use, and have a broad market in my country's towns and rural areas. In vehicles and some other transmission devices, gearboxes are often used, and sometimes in order to obtain different speeds or torques, the gearbox is required to be equipped with multiple sets of gears, and the corresponding gear sets can be changed to obtain the corresponding output. Speed ​​or torque, this process is generally called gear shifting. At present, most electric tricycles rely on the power and speed of the original design and do not have the gear shift function. These electric tricycles can run normally under good road conditions, but when encountering poor road conditions in towns and rural areas or climbing on bridges, they will appear to be un...

AI Technical Summary

Problems solved by technology

These electric tricycles can run normally on good road conditions, but when encountering poor road conditions in towns and rural areas or climbing on bridges, the power will be insufficient, and the load on the motor will increase, which will affect the service life of the motor.

There are also some electric tricycles with gear shifting function now. The gear shifting is combined with the driven gears of the first and second gears by moving the intermediary original. When shifting, the impact noise is large, the shifting is difficult, and the gears are easily damaged.

There is also a transmission device that shifts gears through the forward and reverse rotation of the motor. This type of transmission device has a complicated structure, and frequent changes in the direction of the motor will greatly reduce the service life of the motor.

Chinese patent document CN202327062U (patent application number 201120456386.9) discloses a "clutch for electric tricycle speed change booster". This structure shifts gears manually through a mechanical structure fork, and the shifting action is slow and requires an operator. Controlling the timing of gear shifting requires high technical requirements for the operator, and intelligent control cannot be realized

Chinese patent document CN2519867Y (patent application number 01271037.7) discloses an "electric vehicle gear shifting transmission device", which has a relatively complicated structure and realizes gear shifting through the positive and negative rotation of the motor

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