Two-gear planet row transmission of pure electric vehicle

Abstract

The invention discloses a two-gear planet row transmission of a pure electric vehicle. An input shaft, fixed with a sun gear, is supported in a transmission shell; one end of the input shaft outwardsextends to connect with a motor rotor; an output shaft is supported in the transmission shell; a planet carrier is fixedly arranged on the output shaft; the sun gear is engaged with a planet gear supported on the planet carrier; a low-speed gear tooth hub is fixedly arranged in the transmission shell; a high-speed gear tooth hub is fixedly arranged on the output shaft; a transmission hub idly sleeves the output shaft; an inner gear ring is arranged at one end of the transmission hub for engaging with the planet gear; the other end of the transmission hub is in spline fit with a synchronizer; ajoint sleeve of the synchronizer can axially move to join the synchronizer with the low-speed gear tooth hub or joint the synchronizer with the high-speed gear tooth hub for power transfer; a takeoffoutput shaft is supported in the transmission shell; a takeoff driven gear is fixedly arranged on the takeoff output shaft; a takeoff driving gear is fixedly arranged on an input shaft; and the takeoff driving gear is engaged with the takeoff driven gear to transfer takeoff output power. The transmission is compact in structure, and can realize takeoff output.

Description

technical field [0001] The invention relates to the technical field of transmission, in particular to a two-speed planetary transmission for a pure electric vehicle with a power take-off function. Background technique [0002] Electric vehicles are new, energy-saving and environmentally friendly vehicles, especially in today's environment with severe air pollution, they have great development potential and broad application prospects. An electric vehicle uses an electric motor to replace the engine of a traditional car. The electric motor can be started with load and can meet the requirements of the car through reasonable configuration, which is a big difference from the engine. It is no longer suitable to use multi-speed transmissions on electric vehicles, but if the variable speed transmission device is cancelled, it will be difficult to meet the requirements of vehicle climbing and high-speed driving, especially for small and medium-sized vehicles, it is necessary to rede...

AI Technical Summary

Problems solved by technology

The transmission of the existing electric vehicle usually adopts the transmission of the existing automobile. The input shaft and output shaft of this type of transmission are arranged as parallel shafts. The input shaft of the transmission is connected with the rotor of the motor, and the output shaft of the transmission outputs power. It is realized by gear pairs with different speeds arranged on the input shaft and output shaft, which leads to the transmission with the above structure not only heavy, but also not compact enough in structure and requires a large assembly space

Moreover, the existing electric vehicle transmission does not have a functional structure for additional mechanical devices to take power. If a special vehicle is to be driven by pure electric power, it is necessary to add a special power take-off device between the transmission and the additional mechanical device. The structure is complex, the device installation occupies a large space, and the production cost of the vehicle is increased, which is not conducive to the compactness and miniaturization of the vehicle power drive system

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