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Fully-hydraulic electric fork truck

An electric forklift, full hydraulic technology, applied in the direction of lifting devices, etc., can solve the problems of electric switches, relays, fuel tank volume limitations, maintenance difficulties, etc., to improve reliability and service life, improve safety performance, and reduce labor intensity Effect

Inactive Publication Date: 2004-03-17
ZHEJIANG JIALI TECH +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Most of the existing counterbalanced electric forklifts adopt a three-motor configuration scheme, that is, the traveling drive device, the lifting device and the steering device are driven by one motor respectively. The arrangement of the three motors and their relatively complicated transmission mechanisms make the internal structure of the forklift crowded. , Difficult to assemble, difficult to maintain, and a large number of electric switches and relays required to operate the three motors
During operation, the three motors start and brake frequently, which not only affects the life of the motor transmission mechanism, but also has a large starting current, over-discharge of the power supply, high energy consumption, and low efficiency, which affect the production efficiency of the operation
The chassis structure of the three-motor configuration is complex, which limits the volume of the oil tank, and the heat generated by the hydraulic oil cannot be cooled well, causing the hydraulic oil to heat and age easily, and the hydraulic components and their accessories to be easily damaged, etc., directly affecting the safety and reliability of the whole machine sex
In addition, the speed control of the motor in the walking drive device adopts complex electric speed regulation technology, and most of the electric speed regulation controllers used are imported electric control devices, which are expensive

Method used

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  • Fully-hydraulic electric fork truck
  • Fully-hydraulic electric fork truck
  • Fully-hydraulic electric fork truck

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Embodiment Construction

[0012] As shown in Figures 1, 2, and 3, a fully hydraulic electric forklift includes a power supply, a body 1, a double fuel tank 6, a single motor 4, a variable pump 5 connected to the single motor 4 through a coupling, a multi-way valve 7 and a fork Mast 13, steering device 3 consisting of hydraulic steering gear 31, steering cylinder 32, safety valve 33 and one-way valve 34, tilting lifting device 2 consisting of tilting cylinder 11 and lifting cylinder 12, two-speed hydraulic motor 91 1. The hydraulic brake 92 and the hydraulic speed regulating valve 93 arranged on the motor form the walking drive device 9, and the hydraulic brake 92 is controlled by a hydraulic brake valve 14. The multi-way valve 7 is composed of a tilt control valve 71, a lift control valve 72, a travel reversing valve 73, and a control valve 74. The four valves are connected as a whole by a connecting piece 75, and the four valves are all three-position six-way valves. , the multi-way valve is provided ...

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Abstract

The invention relates to a full-hydraulic electric fork lifter, which comprises lifter body, double oil tank, motor variable displacement pump connected with motor, multiway valve, steering device, inclined lifting device and walking-driving device. It is characterized by that the said motor is single one, and said multiway valve comprise incline valve, lifting valve, walking valve and control valve, said four valves are connected into one body by a connecting component, said multiway valve is equipped with a main oil hole communicated with the said four valves and two brach oil holes, and between said two branch oil holes and variable displacement pump a precedence valve is set to implement single motor driving, hydraulic speed regulation.

Description

【Technical field】 [0001] The invention relates to a counterweight electric forklift, in particular to a full hydraulic electric forklift. 【Background technique】 [0002] Most of the existing counterbalanced electric forklifts adopt a three-motor configuration scheme, that is, the traveling drive device, the lifting device and the steering device are driven by one motor respectively. The arrangement of the three motors and their relatively complicated transmission mechanisms make the internal structure of the forklift crowded. , Difficult to assemble, difficult to maintain, and a large number of electric switches and relays required to operate the three motors. During operation, the three motors start and brake frequently, which not only affects the life of the motor transmission mechanism, but also has a large starting current, over-discharge of the power supply, high energy consumption, and low efficiency, which affect the production efficiency of the operation. The chassi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B66F9/06B66F9/20
Inventor 关景泰刘钊
Owner ZHEJIANG JIALI TECH
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