Dual-motor powertrain, gearbox and vehicle for automobile

Abstract

The invention discloses a double-motor power system for a car, a transmission and the car. The double-motor power system comprises a first motor shaft, a second motor input shaft, a first bearing anda first lubricating channel. The first motor shaft and the second motor input shaft are coaxial; the first bearing is arranged at the end, close to the first motor shaft, of the second motor input shaft in a sleeving mode; the first lubricating channel comprises a first channel body and a second channel body; the first channel body is located in the second motor input shaft and penetrates throughthe end, inserted in a containing cavity of the first motor shaft, of the second motor input shaft in the axial direction; first gaps are formed between the end, close to the first motor shaft, of thesecond motor input shaft and the first motor shaft in the radial direction and the axial direction, and the first gaps communicate with the first channel body; and the second channel body communicates with the first channel body, an opening of the second channel body is located in the peripheral surface of the second motor input shaft and communicates with the outside world. The first lubricatingchannel of the double-motor power system can lubricate the first bearing when the second motor input shaft rotates at a high speed, so that the lubricating effect is good, and the working life of thefirst bearing is prolonged.

Description

technical field [0001] The invention relates to the technical field of automobiles, in particular to a dual-motor power system for an automobile, a gearbox and an automobile. Background technique [0002] At present, electric vehicles usually use a motor independently as a power source, and the motor transmits power to the half shaft through the gearbox to drive the wheels. In order to meet the high speed and climbing requirements of high-performance electric vehicles, it can be matched with a dual-motor power system to increase output power. The dual-motor power system can realize power coupling and mutual switching between different modes, and has the advantages of high transmission efficiency and good power performance. [0003] In the prior art, the gear part of the motor is submerged in lubricating oil, and the lubricating oil is used to lubricate the bearings of the motor. However, when the motor is rotating at a high speed, the lubricating oil will be thrown out due ...

AI Technical Summary

Problems solved by technology

[0004] The problem solved by the present invention is that the motor bearings in the prior art have poor lubrication effect under the condition of high-speed rotation

Images