Reach forklift hydraulic system and control method

Abstract

The invention relates to a reach forklift hydraulic system and a control method. The technical problems that when a reach forklift supplies oil to a forward and backward oil cylinder and a tilting oilcylinder, a motor and an oil pump work at a low-rotating-speed area, working efficiency is low and lifting micromotion performance is poor can be solved. The reach forklift hydraulic system comprisesa large-displacement oil pump motor controller and a small-displacement oil pump motor controller. The large-displacement oil pump motor controller controls a large-displacement oil pump motor to operate. The small-displacement oil pump motor controller controls a small-displacement oil pump motor to operate. The reach forklift hydraulic system further comprises a valve controller. The large-displacement oil pump motor controller and the small-displacement oil pump motor controller are in communication connection with the valve controller through a CAN bus. The valve controller is in communication connection with a lifting thumb switch, a forward and backward thumb switch and a tilting thumb switch of the reach forklift. According to the reach forklift hydraulic system provided by the invention, a small-displacement oil pump is adopted to supply oil to the forward and backward oil cylinder and the tilting oil cylinder independently, working efficiency is high and energy can be saved;and meanwhile the small-displacement oil pump is used for oil supplying during lifting micromotion operation, and the micromotion performance is good.

Description

technical field [0001] The invention relates to the technical field of forklift hydraulic systems, in particular to a forward-moving forklift hydraulic system and a control method. Background technique [0002] The forward-moving forklift uses a single pump to supply oil to the lifting cylinder, the forward-and-forward moving cylinder, and the tilting cylinder. When the motor and oil pump work in the low speed range, the work efficiency is low, the heat generated by the system is large, and energy is wasted. Extremely low, the motor and oil pump work unstable, and the fretting performance is poor. Contents of the invention [0003] The hydraulic system and control method of a forward-moving forklift proposed by the present invention can solve the problem that when the forward-moving forklift supplies oil to the forward and backward moving oil cylinders and tilting oil cylinders, the motor and the oil pump work in the low speed area, the working efficiency is low, and the ...

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Problems solved by technology

[0003] The hydraulic system and control method of a forward-moving forklift proposed by the present invention can solve the problem that when the forward-moving forklift supplies oil to the forward and backward moving oil cylinders and tilting oil cylinders, the motor and the oil pump work in the low speed area, the working efficiency is low, and the lifting is slightly moved. Technical issues with poor performance

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