Electric forklift gantry motion control system

Abstract

The invention discloses an electric forklift gantry action control system which is used for the technical field of forklift gantry control, at least one port A of a multi-way valve is used for being communicated with a rodless cavity of a lifting oil cylinder, when a controller receives a lifting signal, the controller opens the port A and controls a motor to drive an oil pump to rotate, and the lifting signal is sent to the multi-way valve; hydraulic oil in the hydraulic oil tank enters a rodless cavity of the lifting oil cylinder through the oil pump and the port A of the multi-way valve, and the opening degree of the port A and the rotating speed of the motor are gradually increased along with increase of the opening degree O of the controller; when the controller receives the lifting signal and the opening degree O of the controller is smaller than or equal to O12, the controller controls the total flow of hydraulic oil of the oil pump to be larger than the passable flow of the multi-way valve; when the controller receives the lifting signal and the opening degree O of the controller is larger than O12 and smaller than or equal to 100%, the controller controls the total flow of the hydraulic oil to be smaller than the passable flow of the multi-way valve. And throttling speed regulation is adopted at a low rotating speed, and volume speed regulation is adopted at a high rotating speed, so that not only is the micro-motion performance of gantry motion improved, but also the overall energy consumption is reduced.

Description

technical field [0001] The invention relates to the technical field of forklift mast control, and more specifically relates to a motion control system for an electric forklift mast. Background technique [0002] In the prior art, the hydraulic oil flow rate provided by the controller to control the oil pump is always greater than the flow rate that can pass through the multi-way valve, resulting in waste of hydraulic oil and increasing the energy consumption of the vehicle; at the same time, the hydraulic oil flow rate is used to limit the movement speed of the mast, The volume speed regulation of the oil pump is suitable for the fast movement of the mast, but it is difficult to realize the fine adjustment of the mast movement, and the micro-movement performance is poor. [0003] To sum up, how to improve the micro-motion capability and reduce energy consumption of the forklift mast motion control system is an urgent problem to be solved by those skilled in the art. Conten...

AI Technical Summary

Problems solved by technology

[0002] In the prior art, the hydraulic oil flow rate provided by the controller to control the oil pump is always greater than the flow rate that can pass through the multi-way valve, resulting in waste of hydraulic oil and increasing the energy consumption of the vehicle; at the same time, the hydraulic oil flow rate is used to limit the movement speed of the mast, The volume speed regulation of the oil pump is suitable for the fast movement of the mast, but it is difficult to realize the fine adjustment of the mast movement, and the micro-movement performance is poor

Images