Hydraulic system for realizing energy recovery in a simultaneous main and auxiliary double lifting fork truck

CN117776052BActive Publication Date: 2026-05-29ZHUOYI INTELLIGENT TECH (ANHUI) CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
ZHUOYI INTELLIGENT TECH (ANHUI) CO LTD
Filing Date
2022-08-09
Publication Date
2026-05-29

AI Technical Summary

Technical Problem

Existing technologies make it difficult to achieve simultaneous main and auxiliary lifting actions and energy recovery in a three-way stacker forklift with human-mounted upward movement.

Method used

A bidirectional rotating gear pump is used as the hydraulic drive component. When oil is supplied, electrical energy is converted into kinetic energy, and when oil is returned, kinetic energy is converted into electrical energy. The oil supply and return paths are separated by a flow diversion control valve and a pilot-operated sequence valve, which respectively control the lifting action and energy recovery of the main and auxiliary actuators.

Benefits of technology

While achieving synchronous lifting of the main and auxiliary forklifts, it also realizes energy recovery, improving the forklift's working efficiency and endurance.

✦ Generated by Eureka AI based on patent content.

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    Figure CN117776052B_ABST
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Abstract

The present application relates to a kind of hydraulic systems for energy recovery in main and auxiliary simultaneous double lifting fork truck, comprising: hydraulic drive assembly, including gear pump, when oil is entered, power supply electrical energy drives gear pump positive rotation as hydraulic pump to supply oil for system, when oil is returned, oil potential drives gear pump reverse as hydraulic motor to convert potential energy into electrical energy recovery;Oil supply circuit, comprising: flow split control valve at least first oil supply circuit and second oil supply circuit are divided into first oil supply circuit and second oil supply circuit, and first oil supply circuit and second oil supply circuit are controlled the lifting action of main and auxiliary execution assembly respectively;Oil return circuit, comprising: first oil return circuit and second oil return circuit, wherein at least one oil return circuit is connected with gear pump by pilot sequential valve, and oil flows back to tank through gear pump, and drives gear pump to rotate.The present application not only meets the function of main and auxiliary lifting synchronous lifting, but also realizes the recovery of energy, improves work efficiency, and meets the use requirement of long endurance.
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