Double-motor driving device with planetary gears

Abstract

The invention discloses a double-motor driving device with planetary gears. The double-motor driving device comprises a planetary gear speed reducer (120), a first motor (130) and a second motor (140). The double-motor driving device has the advantages that a planetary carrier (121), a sun gear (123) and a first motor shaft (131) are of hollow structures, the first motor shaft (131) is connected with the sun gear (123), a second motor shaft (141) penetrates the hollow structures of the first motor shaft (131), the sun gear (123) and the planetary carrier (121) and is connected with the planetary carrier (121), deceleration output effects can be realized by the first motor (130), direct output effects can be realized by the second motor (140), accordingly, the double-motor driving device has two tap positions equivalently, mechanical gear shifting mechanisms can be omitted, only the motors need to be switched over to realize driving effects according to working conditions, problems of insufficient power performance and complexity in gear shifting control in the prior art can be solved, and the double-motor driving device is mainly applied to the field of driving devices of pure electric vehicles.

Description

technical field [0001] The invention relates to the field of driving devices for pure electric vehicles, in particular to a planetary gear dual-motor driving device. Background technique [0002] At present, automobile emission has become one of the main factors of environmental pollution. In order to protect the environment and reduce automobile emission, the development of pure electric vehicles has become one of the important means to solve environmental problems. [0003] The driving device of the current pure electric vehicle mainly has two structures, one is that the motor is directly driven without a speed change mechanism, and the other is that the motor is driven by a speed change mechanism with variable speed. The former type has no speed change mechanism and is easy to control, but has the problem of insufficient power performance for climbing and acceleration. The speed change mechanism improves the power performance of climbing and acceleration, and does not re...

AI Technical Summary

Problems solved by technology

The former type has no speed change mechanism and is easy to control, but has the problem of insufficient power performance for climbing and acceleration. The speed change mechanism improves the power performance of climbing and acceleration, and does not require high current to work. However, due to the use of the traditional speed change mechanism, the shift control becomes complicated and the complexity of the vehicle control is increased.

Therefore, it is also a positive challenge to design a driving device with better dynamic performance and simple control.

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