Potential energy recovery system of division type electro-hydraulic drive forklift and division type electro-hydraulic drive forklift

Abstract

The invention provides a potential energy recovery system for a division type electro-hydraulic drive forklift. The potential energy recovery system comprises a lifting oil way, an inclined oil way, a hydraulic drive and energy recovery assembly and an electric drive and energy recovery assembly. The lifting oil way comprises a first hydraulic oil cylinder and a second hydraulic oil cylinder, the first hydraulic oil cylinder and the second hydraulic oil cylinder are suitable for being communicated with a fork piece of the forklift, and the electric driving and energy recycling assembly is communicated with a hydraulic oil tank, the lifting oil way and the inclined oil way. The hydraulic driving and energy recycling assembly is communicated with the lifting oil way and the inclined oil way, and the inclined oil way comprises an inclined hydraulic oil cylinder suitable for being communicated with the fork piece. The invention further provides the division type electro-hydraulic drive forklift, through the arrangement, potential energy generated after lifting can be effectively recycled, and the service life of the forklift is prolonged.

Description

technical field [0001] The invention relates to the technical field of electric forklift hydraulic systems, in particular to a potential energy recovery system of a split-type electro-hydraulic drive forklift and a split-type electro-hydraulic drive forklift. Background technique [0002] With the rise of my country's economy, the logistics industry has become a major industry in my country, and has achieved great development. Logistics is a comprehensive management that integrates modern transportation, warehousing, storage, handling, packaging, product circulation and logistics information. As a construction machinery for transportation and handling, forklifts have also developed rapidly. However, traditional construction machinery is always inseparable from the labels of noise, exhaust emissions, and high energy consumption. The technology of electric forklifts has gradually matured, which has brought good news to people in terms of reducing emissions and improving enviro...

AI Technical Summary

Problems solved by technology

[0003] When the existing electric forklift completes the lifting, tilting and steering actions in the working process, there will be potential energy conversion. The traditional hydraulic system consumes the potential energy at the throttle valve port, but this will cause a large amount of energy loss, making the hydraulic pressure The temperature of the system rises, which in turn affects the stability of the hydraulic system during operation, causing problems such as oil leakage, noise and vibration, which affects the reliability of the forklift system and the whole machine, thus reducing the service life of the hydraulic system

Therefore, it is necessary to recover energy from the potential energy. The potential energy recovery and energy-saving technologies currently used mainly include the following methods: First, the hydraulic accumulator is used to directly store the hydraulic oil in the oil return chamber of the lift cylinder to realize hydraulic energy recovery, but this method Due to the pressure change in the hydraulic accumulator, the speed of the oil cylinder will also change, which reduces the controllability; the second is to use the electric / power generation-pump / motor method to convert the potential energy of the lifting weight into electrical energy and store it in the power battery. Electrical energy recovery, but when using this method, multiple conversions between electrical energy, mechanical energy and hydraulic energy are required, which increases energy loss during the energy conversion process, and uses this method to perform electrical energy recovery in the lifting system During the recycling process, the tilting system cannot operate normally; the third is to use electric cylinders instead of hydraulic cylinders to separate the tilting and steering systems, but the price of electric cylinders is much higher than that of hydraulic cylinders, and the production cost is very high

Therefore, the existing technology still cannot recover the potential energy of the forklift well.

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