Electric forklift energy recovery system

Abstract

The invention provides an energy recovery system of an electric forklift. The energy recovery system comprises a hydraulic driving module, a control module and an energy recovery module, the hydraulic driving module comprises a lifting oil cylinder group, a hydraulic power unit and a three-position six-way electromagnetic directional valve; the hydraulic power unit is communicated with the lifting oil cylinder group; the energy recovery module comprises a recovery oil cylinder group, a two-position two-way electromagnetic directional valve, a two-position three-way electromagnetic directional valve, a generator and a battery; a sliding block is installed on the base, a rotating mechanism is installed on the sliding block, the rotating mechanism rotates through movement of the sliding block, the rotating mechanism is connected with a generator through an electromagnetic clutch, and the control module selectively controls connection of a three-position six-way electromagnetic reversing valve, a two-position two-way electromagnetic reversing valve, a two-position three-way electromagnetic reversing valve and the electromagnetic clutch. And an outlet of the lifting oil cylinder group is communicated with an inlet of the recovery oil cylinder group for recovering energy in the descending process of the load or the sliding block. The energy utilization efficiency can be effectively improved, and the endurance anxiety of the electric forklift is relieved.

Description

technical field [0001] The invention relates to the field of electric forklifts or the field of energy conversion of lifting equipment, in particular to an electric forklift energy recovery system. Background technique [0002] With the rapid development of social economy, the modern industrial logistics system has become the infrastructure to promote social development and economic construction, which is of great significance to the formation of the scale of the national economy and the development of modern industries. The types, frequency and scale of logistics in the modern industrial logistics system are increasing day by day. Therefore, the importance of loading and unloading is more significant. Forklifts are widely used in the industrial transportation industry due to their efficient handling capabilities and strong operational flexibility. various places. On the other hand, the energy crisis and the pressure of energy conservation and emission reduction are severe....

AI Technical Summary

Problems solved by technology

[0004] At present, the existing electric forklift energy recovery system usually uses hydraulic accumulators and hydraulic motors to drive the motor to generate electricity to save energy, but the technology is not yet mature, the energy recovery efficiency is difficult to guarantee, and the control is complicated. The requirements are high, and the accumulator equipment is huge, which affects the internal space layout of the electric forklift and the operation mobility of the whole vehicle, and is extremely unsuitable for the installation and use of small electric forklifts

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