Electric transmission device of electric wheel mining truck

Abstract

The invention relates to an electric transmission device of an electric wheel mining truck, which belongs to the technical field of power transmission of mining trucks. The electric transmission device of the electric wheel mining truck comprises an accelerator pedal, a brake pedal, a gear position handle, a controller, an engine, an alternating current generator, a rectifier, a frequency converter I, a frequency converter II, a radiating fan, a resistance grid I, a resistance grid II, an electric braking converter I, an electric braking converter II, a speed sensor, a mechanical brake, alternating current motors, a wheel-side speed reducer, a left wheel pair and a right wheel pair. The electric transmission device has the beneficial effects that the device follows the principle of giving priority to brake, the left wheel pair and the right wheel pair are driven by the independent alternating current motors, each alternating current motor is controlled by the independent frequency converter, and the controller can compare the driving powers of the left wheel pair and the right wheel pair to the alternating current motors, realize the balanced driving force of the left wheel pair and the right wheel pair and prevent the deviation of the mining truck; secondly, a mechanical system does not exist between the left wheel pair and the right wheel pair for directly connecting the left wheel pair with the right wheel pair, the left wheel pair and the right wheel pair are kept independent mutually, and the different rotational speeds of the left wheel pair and the right wheel pair are allowed during the turning process, thereby realizing flexible differential speed.

Description

technical field [0001] The invention relates to an electric transmission device, in particular to an electric transmission device for mine trucks with electric wheels, and belongs to the technical field of power transmission for mining trucks. Background technique [0002] Mining trucks are the key equipment in open-pit mining and large-scale earthwork construction. They are professional equipment used for ore or earthwork transportation. They have the characteristics of heavy load and high work efficiency. According to different transmission methods, mining trucks are divided into two categories, namely mechanical transmission and electric transmission. The mechanical transmission adopts the transmission mode of engine + gearbox + differential, which is characterized by high transmission efficiency, complex mechanical structure of the transmission system, and limited torque that can be transmitted. Generally, small-tonnage mining trucks use mechanical transmission. With th...

AI Technical Summary

Problems solved by technology

[0008] For example, Chinese invention patent 200680035965.8 provides an electric transmission system for construction machinery, including an engine, a generator, at least one electric motor and a control system. The transmission system provided by this patent still uses the traditional mechanical inter-wheel differential device, and the mechanical differential complex structure

Images