Electric forklift integrated power system and forklift

Abstract

The invention discloses an electric forklift integrated power system and a forklift. Problems that an existing electric forklift driving and hydraulic power system is single in technical route; a connecting cable in the system is too long, assembling of a whole vehicle is not facilitated, cost is increased and use efficiency of electric energy is affected due to a fact that the cable is too long;and heat dissipation efficiency and functions are not easy to achieve, each unit needs to be cooled or heat dissipation is performed on each unit independently so that a structure is very complex, andcost is greatly increased are solved. A driving power subsystem, a hydraulic power subsystem and an upper power control subsystem are included. The system and the forklift are highly integrated, arrangement is compact, a unified whole body is integrated in structure, distributed arrangement is not needed, the structure is simple and whole vehicle installation is convenient, and an integration degree and reliability of the power system are greatly improved; and forced air cooling heat dissipation is performed on the driving motor, an oil pump motor, a driving motor controller and an oil pump motor controller, the reliability of an integrated power system is improved, and a service life is prolonged.

Description

technical field [0001] The invention belongs to the field of electric industrial vehicles, and relates to an integrated power system technology of an electric forklift, in particular to an integrated power system of an electric forklift and a forklift. Background technique [0002] China's industrial vehicle market has a broad space for development, especially the market potential of electric forklifts is huge. With the continuous development of the economy, higher requirements are put forward for the electric forklift drive and hydraulic power system. [0003] The existing electric forklift driving and hydraulic power system has a single technical route, basically using the driving motor and the front axle reducer to form the walking power unit, the oil pump motor and the oil pump to form the hydraulic power unit, and the drive motor controller and the oil pump motor controller to form the motor. Control unit; the entire power system adopts a large-scale decentralized arra...

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Problems solved by technology

[0005] The purpose of the present invention is to propose an electric forklift integrated power system and a forklift, which are used to solve the problem that the existing electric forklift drive and hydraulic power system have a single technical route, and the length of the connecting cable in the system is too long, which is not conducive to the assembly of the whole vehicle, and the line Too long cables will increase the cost and affect the efficiency of electric energy use, and the heat dissipation efficiency and function are not easy to realize, and each unit needs to be cooled or dissipated separately, resulting in a very complicated structure and a large increase in cost; the present invention is highly integrated and compactly arranged , the structure is completely integrated into a unified whole, no need for distributed layout, simple structure, easy to install on the whole vehicle, greatly improving the integration and reliability of the power system; the integrated power system greatly reduces the length of external cable connections between components , by reducing the length of the cable, while reducing the assembly and installation process, the resistance caused by the excessive length of the cable can be reduced, the operating efficiency of the power system can be improved, and the working time of the electric forklift can be extended. The motor controller and the oil pump motor controller implement forced air cooling, which greatly reduces the temperature rise of the electric forklift drive and hydraulic power subsystem, improves the reliability of the integrated power system, prolongs the service life, and meets the more stringent requirements for the use of electric forklifts;

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