Automatic leveling device and method for fork of electric forklift

Abstract

The invention discloses an automatic leveling device and method for the fork of an electric forklift. The automatic leveling device comprises an oil circuit valve group, an oil pump motor, a horizontal measuring module used for measuring the inclination degree of the fork and a central processing unit, wherein the central processing unit reads and processes the inclined value measured by the horizontal measuring module and sends a signal so as to control the oil circuit switching of the oil circuit valve group and the start and stop of the oil pump motor; the central processing unit further controls the expansion and contraction quantity of a leveling cylinder by controlling the oil circuit switching of the oil circuit valve group and the start and stop of the oil pump motor, so that the inclination degree of the fork can be adjusted; the expansion and contraction quantity of the leveling cylinder is in positive correlation with the inclination degree of the fork; the inclined value of the fork is measured by the horizontal measuring module, read and processed by the central processing unit, and a pulse signal is sent by the central processing unit to control the oil circuit switching of the oil circuit valve group and the start and stop of the oil pump motor; the expansion and contraction quantity of the leveling cylinder is controlled by the oil pump motor, and therefore the purpose of leveling the fork is achieved.

Description

technical field [0001] The invention relates to a control device and a control method for a pallet fork of an electric forklift, in particular to an automatic leveling device and a leveling method for a pallet fork of an electric forklift. Background technique [0002] Mast components include inner mast, middle mast, outer mast, fork frame, fork and so on. The fork is installed on the fork frame, and the device for adjusting the inclination of the fork is installed on the fork frame, also known as the fork leveling device. The electric forklift will use the fork leveling function in the operation of forklift or unloading. [0003] The operation process of the fork is as follows: first raise the fork to a certain height, that is, the height of the fork is consistent with the fork hole of the pallet on the shelf. Stretch into the fork hole of the pallet and adjust the fork to tilt upward, the pallet and the weight of the goods fall on the fork, and then the pallet and the fo...

AI Technical Summary

Problems solved by technology

[0006] The above-mentioned adjustment of the inclination of the fork through manual observation and manual operation has the following disadvantages: in many cases, due to the problem of human vision, the object of the fork cannot be observed or it is difficult to observe, so it is impossible to accurately judge the fork at this time. Is it already level

[0007] Because of this, the traditional operation method, even a skilled operator, is difficult to be fully competent in this operation process, and the operation efficiency is relatively low

If the fork is not properly leveled, electric forklifts can easily cause safety accidents

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