Coaxial two-gear planet row electric drive axle for automobile

Abstract

The embodiment of the invention discloses a coaxial two-gear planet row electric drive axle for an automobile. The electric drive axle comprises a sun gear, a plurality of planet gears, a planet carrier, a gear ring, a synchronizer, a differential mechanism, a synchronizer gear shifting motor and a drive motor which are all installed in a shell. The sun gear, the planet carrier, the gear ring, thedifferential mechanism and the synchronizer are coaxial, the axis of each planet gear is parallel to the axis of the sun gear, a power output shaft of the driving motor is connected with the sun gear, the sun gear is externally meshed with the plurality of planet gears, the planet gears are installed on the planet carrier, the planet gears are internally meshed with the gear ring, the synchronizer gear shifting motor is connected with the synchronizer, the synchronizer is fixedly connected with the gear ring, and the planet carrier is connected with the differential mechanism. By applying thescheme provided by the embodiment of the invention, when the torque and the rotating speed input by the driving motor are not changed, the high torque and the low rotating speed can be output, and the low torque and the high rotating speed can also be output, so that the driving requirements of different road conditions can be met.

Description

technical field [0001] The invention relates to the technical field of electric drive axles, in particular to a coaxial two-speed planetary row electric drive axle for automobiles. Background technique [0002] At present, the electric drive axles used in new energy vehicles are mainly planetary gear electric drive axles. [0003] The planetary gear electric drive axle in the prior art can only obtain one reduction ratio. Therefore, when the input torque and speed of the motor are constant, when the planetary gear electric drive axle is working, it can only output a fixed torque and a fixed speed , and the output fixed torque and fixed speed are generally high torque and low speed, or low torque and high speed. [0004] And for different road conditions, it is required that the electric drive axle can output both high torque and low speed and can output low torque and high speed. Low speed, as well as low torque and high speed, may still not be able to meet the driving nee...

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Problems solved by technology

[0003] The planetary gear electric drive axle in the prior art can only obtain one reduction ratio. Therefore, when the input torque and speed of the motor are constant, when the planetary gear electric drive axle is working, it can only output a fixed torque and a fixed speed , and the output fixed torque and fixed speed are generally high torque and low speed, or low torque and high speed

[0004] And for different road conditions, it is required that the electric drive axle can output both high torque and low speed and can output low torque and high speed. Low speed, as well as low torque and high speed, may still be unable to meet the driving needs of different road conditions when the motor is running at full power or at the highest output speed

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