Dual-motor transmission structure, driving system and electric engineering vehicle

Abstract

The invention relates to a dual-motor transmission structure, which comprises a first motor M1, a second motor M2, a power coupling transmission unit, a walking driving force transmission unit and a walking driving force output shaft S-out, and is characterized in that the power coupling transmission unit is in transmission connection between an output shaft of the first motor M1 and an output shaft of the second motor M2; a walking driving force output end is arranged on the walking driving force output shaft S-out; the driving system controls power output in a coupling mode through the main control system and is used for driving a walking system in the electric engineering vehicle, the needed vehicle state is achieved, the flexible characteristic of double-motor control is utilized, gearbox gear shifting is omitted, the working condition requirement for high-speed transition of the engineering vehicle is met, the economical efficiency and reliability of the whole vehicle are improved, and the driving system is simple in structure control and low in cost, power interruption is avoided; the whole vehicle is more compact in arrangement, space is saved, the motor often works in a high-efficiency interval, the overload working condition is few, and the service life of the motor is prolonged.

Description

technical field [0001] The invention relates to the technical field of electric engineering vehicles, in particular to a dual-motor transmission structure and an engineering vehicle. Background technique [0002] In order to meet the continuous improvement of construction operation efficiency and the requirements of environmental protection, construction machinery is gradually developing in the direction of electrification. The current configuration of the construction machinery walking system directly replaces the engine with a single motor, retains the original gearbox as the power source, and does not take advantage of the wide torque and speed of the motor, resulting in a single motor that will keep the motor in the low-efficiency torque area for a long time At the same time, it is difficult to coordinate the gear shift strategy of the gearbox and the motor, and the economy of the whole vehicle is poor. Taking the typical electric construction machinery of loader as an ...

AI Technical Summary

Problems solved by technology

[0003] In the prior art, several patents have proposed a dual-input, single-output power coupling system. Although such a system can be applied to a carrier vehicle with a single drive configuration, it is difficult to directly meet high-speed transition and low-speed high-torque operations. Electric construction machinery, and the realization of power coupling and shift control are complicated, the development cost is high, and power interruption will occur during the shift process, so it is difficult to apply to the development of electric construction vehicles

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