Rear axle assembly of electric automobile

Abstract

The invention provides a rear axle assembly of an electric automobile, and belongs to the technical field of electric automobiles. The assembly solves the problems that the rear axle of the existing electric automobile has high energy consumption and cannot automatically shift gears. The rear axle of the electric automobile comprises a speed reducer, a differential and two bridge tubes connected to the differential, wherein half shafts are arranged in the bridge tubes in a penetrating manner; brake drum discs driven to rotate by the half shafts are arranged at the outer end parts of the bridgetubes; the speed reducer consists of an input gear assembly, a shift gear assembly and an output gear assembly; a main motor capable of driving the input gear assembly to work is connected to an outer shell of the speed reducer; a shift motor capable of driving the shift gear assembly to shift gears is arranged on the outer shell of the speed reducer; a speed sensor capable of monitoring the output gear assembly is arranged on the outer shell of the speed reducer; a signal monitored by the speed sensor is transmitted to a traveling computer; and the traveling computer analyzes the signal andsends a shift instruction to the shift motor. The assembly has the advantages of high automation degree, low energy consumption and accurate gear shifting.

Description

technical field [0001] The invention belongs to the technical field of machinery and relates to an electric vehicle rear axle assembly. Background technique [0002] With the dwindling of oil resources and the increasing seriousness of air pollution, new energy vehicles are becoming a development hotspot, especially the development of electric vehicles has become the focus of new energy development. At present, the electric vehicles produced and used are basically not equipped with transmission devices. The reason is that the transmission technology suitable for electric vehicles is immature, so the existing electric vehicles can only use single-stage reducers, which mainly have the following disadvantages: First, the start-up fee Second, there is no power to go uphill at low speed; third, there is no high speed; and fourth, there is no neutral gear, which causes the motor to generate electricity to the controller when it goes downhill, and it is easy to burn the controller....

AI Technical Summary

Problems solved by technology

At present, the electric vehicles produced and used are basically not equipped with transmission devices. The reason is that the transmission technology suitable for electric vehicles is immature, so the existing electric vehicles can only use single-stage reducers, which mainly have the following disadvantages: First, the start-up fee The second is that there is no power to go uphill at low speed; the third is that there is no high speed; the fourth is that there is no neutral gear, which causes the motor to generate electricity to the controller when it goes downhill, and it is easy to burn out the controller.

The weight of the welded and formed rear axle housing is too heavy, which leads to high fuel consumption of the car, especially for light electric vehicles.

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