Integral input electric vehicle transmission with front planetary gear train

Abstract

The invention discloses an overall input type electric car transmission with a preposed planetary gear train. The overall input type electric car transmission with the preposed planetary gear train comprises a main variable transmission system and the planetary gear train, wherein the planetary gear train transports motive power to a main variable transmission system, the main variable transmission system is provided with a motive power input shaft, and a planet carrier of the planetary gear train is used as a motive power output end and is integrally formed with the motive power input shaft. Due to the fact that the planet carrier and the main variable transmission system are integrally formed, loading capacities of a motor and a transmission system are increased, and a scope of the transmitted power and a scope of transmission are enlarged. Since abrupt changes of the transmission are avoided, operation noises are reduced, transmission efficiency is improved and service life of the transmission system is prolonged. Meanwhile, an overall transmission chain structure enables the size of the structure not to be enlarged obviously on the premise of the preposed transmission train. Also, the transmission is stable, and decrease of the efficiency caused by an intermediate transmission sub-connection is prevented, and therefore the whole transmission system is stable in structure, strong in integrity, good in integration, convenient to maintain and repair, and capable of lowering manufacture cost and reducing manufacturing process.

Description

technical field [0001] The invention relates to a motor vehicle component, in particular to an integral input type electric vehicle transmission of a front planetary gear train. Background technique [0002] Electric vehicles (two-wheel, three-wheel and electric vehicles) are powered by on-board power batteries to drive electric vehicles. Due to the characteristics of energy saving, environmental protection and lightness, and low cost of use, electric vehicles have attracted more and more attention. [0003] Electric vehicles generally include power supply, motor, transmission, walking assembly and control system. Due to the operating characteristics of the electric motor, the transmission of electric vehicles generally does not use gear shifting, and directly controls the speed of the vehicle by adjusting the motor speed; while the output torque is relatively small. For large uphill roads, using the existing single transmission structure, only the power output can be increa...

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Problems solved by technology

[0003] Electric vehicles generally include power supply, motor, transmission, walking assembly and control system. Due to the operating characteristics of the electric motor, the transmission of electric vehicles generally does not use gear shifting, and directly controls the speed of the vehicle by adjusting the motor speed; while the output torque is relatively small. For large uphill roads, using the existing single transmission structure, only the power output can be increased to achieve the purpose of climbing, which will cause a lot of waste of power. Moreover, because the transmission structure is more concerned with driving on flat ground, therefore, The effect of increasing the power output for climbing is not ideal, and sometimes even the motor stall phenomenon occurs

[0004] In the prior art, even in other types of motor vehicles, or in the two-speed transmission developed by the applicant of the present application, the power is directly input by the motor. When there is a sudden change in load, the carrying capacity is not strong, and the transmission power The range and transmission range are not large enough, so the operation noise is large, the transmission efficiency is low, and the service life of the transmission is affected; if the front transmission is added, the structure of the entire transmission will be complicated and the volume will be large, which is not suitable for electric vehicles, etc. light vehicle

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