Coaxial axle driven by double motors

Abstract

The invention discloses a coaxial axle driven by double motors. The coaxial axle comprises an axle housing and two driving half shafts and further comprises a main motor, an auxiliary motor, a speed reducer and a differential mechanism, the main motor and the auxiliary motor are connected in series and then connected with the speed reducer, the speed reducer is connected with the differential mechanism, and a transmission shaft of the main motor, a transmission shaft of the auxiliary motor and the two driving half shafts are coaxially arranged. Transmission shafts of the main motor and the auxiliary motor are of hollow structures, one driving half shaft is directly connected with the differential mechanism, and the other driving half shaft penetrates through the hollow structures to be connected with the differential mechanism. According to the coaxial axle system, the optimal power output of the whole vehicle under all working conditions can be achieved through coupling of the double motors, the system always works in the optimal efficiency area, and the endurance mileage of the whole vehicle is increased; in addition, due to the coaxial arrangement of the double motors and the transmission shaft, the ground clearance of the axle can be reduced to the maximum extent, and the low-floor high-end design of the whole vehicle is facilitated.

Description

technical field [0001] The invention belongs to the technical field of new energy electric vehicles, and more specifically relates to a coaxial axle driven by dual motors for new energy vehicles. Background technique [0002] The cruising range of new energy electric vehicles is a key bottleneck restricting the development of the industry. Based on the space and cost of the vehicle, the battery capacity installation is limited. Therefore, under a certain battery loading capacity, improving the efficiency of the drive system has become a key technology to solve the cruising range. . [0003] At present, the electric axles for new energy electric vehicles mainly use external parallel axles, and the direct-drive single motor mounted on them has the characteristics of simple structure, easy control and mature technology. However, the actual working conditions of the whole vehicle are very complicated. Based on the working characteristics of the motor itself, the driving efficie...

AI Technical Summary

Problems solved by technology

However, the actual working conditions of the whole vehicle are very complicated. Based on the working characteristics of the motor itself, the driving efficiency of the single-motor driving mode is low under the conditions of light load and heavy load of the whole vehicle, which leads to a shortened driving mileage.

In addition, because the motor of the traditional external parallel axle is not in the same axis as the axle, its power needs to pass through multi-stage gears before it can be transmitted to the vehicle, resulting in energy loss; and the external mounting structure of the motor will raise the The distance from the ground is not conducive to the high-end design of the vehicle with a low floor

[0004] That is to say, the current high-efficiency working area of ​​the axle is relatively limited, especially in the light-load and heavy-load working conditions of the whole vehicle, and the efficiency is low, and the external parallel axle has a large distance from the ground due to its structural layout characteristics, and the whole vehicle cannot achieve low The high-end design of the floor, the vehicle premium ability is poor

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