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Full hydraulic electric forklift hydraulic system

A technology of electric forklifts and hydraulic systems, applied in the direction of lifting devices, etc., can solve the problems of damaged hydraulic motors, poor stability performance, high oil temperature, etc., and achieve stable hydraulic control of braking maneuverability, improved working stability, and improved reliability Effect

Inactive Publication Date: 2007-10-24
ZHEJIANG JIALI TECH
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AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved and the technical task proposed by the present invention are to overcome the problems of low efficiency, high energy consumption, high oil temperature, damage to the hydraulic motor, poor stability of walking and braking in the hydraulic system of the prior art. Defects, provide a new hydraulic system for fully hydraulic electric forklifts

Method used

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  • Full hydraulic electric forklift hydraulic system
  • Full hydraulic electric forklift hydraulic system

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Embodiment Construction

[0019] As shown in Figure 1, the hydraulic system of a full-hydraulic electric forklift is composed of a single motor 9 and a gear pump 8 connected by transmission to form a power plant; a lifting cylinder 11 and a tilting cylinder 12 form a tilting lifting device 4; The steering device 1 is composed of the device 13 and the steering cylinder 14; the traveling drive device 5 is composed of a two-speed hydraulic motor 21, a hydraulic brake 23 arranged on the motor and a hydraulic speed regulating valve 22; Valve 17 is controlled. The multi-way valve 3 is composed of a tilting valve 15, a lifting valve 16, etc.; the main oil circuit of the oil inlet valve of the multi-way valve 3 is provided with a relief valve 27 to control the system pressure of the tilting lifting device 4, and the main oil circuit and the tilting valve 15 It communicates with the cavity of the lift valve 16, wherein the lift valve 16 is provided with a relief valve 28 to control the lift pressure; the tilt v...

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Abstract

The overall hydraulic electric forklift hydraulic system comprises the hoist oil cylinder, slanting oil cylinder formed slanting lifting device, steering device mainly made of the deflector and the steering oil cylinder, hydraulic motor, hydraulic motor brake and its speed regulating valve. The above mentioned three devices can get hydraulic energy form a generator driven gear pump, the said gear pump generated hydraulic energy divided into two ways, one passing through the optimal valve supplying to the said steering device and several valve controlled lifting device, the other way going to the control valve and converting brake valve drive device through change-over valve. It can replace variable pump for the control of the generator gear pump through electricity, getting rid of the low efficiency, big energy consumption, high oil temperature, long time damage to the hydraulic motor, traveling, and poor brake stability.

Description

technical field [0001] The invention relates to an electric forklift, in particular to a hydraulic system of a fully hydraulic electric forklift. Background technique [0002] The hydraulic principle design form of the existing full-hydraulic electric forklift (such as the technical scheme of invention patent No. 01125120.4) is that the motor drives the variable pump at a constant speed of 1650rpm as the power source, and combines lifting, tilting, control, and reversing Working together, the working method of hydraulic speed regulation is adopted. This design not only makes the hydraulic system have low efficiency, high energy consumption, high oil temperature, and high cost, but also damages the hydraulic motor after long-term use, and the stability of walking and braking is poor. Contents of the invention [0003] The technical problem to be solved and the technical task proposed by the present invention are to overcome the pro...

Claims

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Application Information

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IPC IPC(8): B66F9/22
Inventor 陈勇
Owner ZHEJIANG JIALI TECH
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