Integrated coaxial electric drive axle system

Abstract

The invention relates to an integrated coaxial type electric drive axle system. The system comprises a power battery, an inverter, a drive motor, a coaxial type speed reducer and a differential mechanism which are connected in sequence, the inverter is fixed to the drive motor and shares a cooling system with the drive motor, and the output shaft of the drive motor is a hollow shaft and is arranged on the drive shaft in a sleeving mode. The coaxial speed reducer comprises an intermediate shaft large gear and a differential mechanism input gear which are coaxial, the intermediate shaft large gear is connected with the output shaft of the driving motor through a gear, the differential mechanism input gear serves as power input of the differential mechanism, and the output end of the differential mechanism is connected with the driving shaft. The driving motor, the inverter, the coaxial speed reducer and the like are highly integrated together, so that power input and power output are onthe same straight line, application and arrangement of the whole vehicle are facilitated, and the problems that an existing driving system is low in integration level and disordered in wiring are solved; and the system has the advantages of high integration degree, small size, light weight, good heat dissipation performance, wide application vehicle types and the like.

Description

technical field [0001] The invention relates to the technical field of electric vehicle drive systems, in particular to an integrated coaxial electric drive axle system. Background technique [0002] In the case of increasingly scarce oil resources and increasingly serious environmental pollution, new energy vehicles are becoming more and more popular in the market. With the continuous development of the new energy automobile industry, the interior layout space of automobiles is becoming more and more compact, and the requirements for the power density of the electric drive system of the whole vehicle are getting higher and higher. It is getting higher and higher to meet the needs of the vehicle for space layout and power density. However, existing pure electric vehicles usually adopt a structure in which the drive motor, inverter, and gearbox are separated, or are integrated in parallel shafts. Such a structure will cause too much installation space, the power density of ...

AI Technical Summary

Problems solved by technology

Such a structure will cause too much installation space, the power density of the electric drive system is not high, and the application models are limited

However, if the inverter, the drive motor, and the gear box are highly integrated and coaxial, there are more signal lines to be connected between the inverter and the drive motor, and the volume of the inverter and the gear box itself is relatively large. Large, so there will be messy wiring and easy to put too much pressure on the drive motor

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