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A safety control system for the fork operated by the manual control valve of the forklift

A technology of safety control and valve operation, which is applied in the field of forklift safety control system, can solve the problems of cargo smashing and injuring the driver, cargo hurting pedestrians or drivers, and unimproved safety, so as to achieve the goal of protecting safety and improving driving Difficulty, the effect of reducing driving fatigue

Active Publication Date: 2022-04-26
HEFEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

With the development of the economy and the advancement of science and technology, forklifts have replaced manual handling and become an indispensable part of the development of modern industry. Therefore, the demand for forklifts in my country has also increased rapidly. The safety has not been improved when the forklift is shoveling goods, which is mainly reflected in the fact that when the forklift is shoveling goods, if the fork is tilted forward or backward too much, the goods will fall and hurt pedestrians or drivers; when the fork tilts back too fast and the height of the goods is too high The cargo will fall and injure the driver

Method used

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  • A safety control system for the fork operated by the manual control valve of the forklift
  • A safety control system for the fork operated by the manual control valve of the forklift
  • A safety control system for the fork operated by the manual control valve of the forklift

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0091] Example 1: Limit position buffering of the fork safety control system

[0092] Fork forward work

[0093] Taking the full load of the fork as an example, it is measured that when the fork is fully loaded, the buffer angle of the forward tilt limit position is 5°, and the buffer speed of the fork is 2° / s.

[0094] When the fork is tilted forward at a speed of 3° / s with a rated load of 3 tons, and the fork is gradually tilted to 5°, then the controller sends an instruction to energize the tilt two-position three-way solenoid valve to open the valve. Reduce the tilting speed of the fork to 2° / s, thereby completing the buffering at the limit position of the forward tilt. At this time, the value of the pressure sensor installed on the rear wheel is normal, which shows that the forklift is in a safe state.

[0095] Rear tilting work of the fork;

[0096] Taking the full load of the fork as an example, it is measured that when the fork is fully loaded, the buffer angle at th...

Embodiment 2

[0098] Example 2: Fork forward tilt angle limitation;

[0099] The measured installation position of the height sensor is 2.5m, and the maximum preset safety angle when the fork is fully loaded is 5°.

[0100] When the fork is working with a full load of 3 tons, it is lifted to 4m, and when the fork is tilted forward to the maximum preset angle of 5° at full load, the tilting two-position three-way solenoid valve is energized to cut off the oil supply line of the tilting cylinder. When the fork stops tilting forward, the limit of the forward tilt angle of the fork is completed. At this time, the value of the pressure sensor installed on the rear wheel is normal, which means that the forklift is in a safe state.

Embodiment 3

[0101] Embodiment 3: Fork backward tilt speed limit;

[0102] It is measured that the maximum preset backward tilting speed is 2° / s when the fork is working with the maximum load backward tilting.

[0103] The fork lifts to 4m with a maximum load of 3 tons, and when the fork is tilted backward at a speed of 3° / s, the controller sends an instruction to reduce the opening of the tilt two-position three-way valve, and the oil supply speed of the tilt cylinder is reduced, so that The reclining speed of the fork is reduced to within 2° / s to complete the speed limit of the fork reclining.

[0104] Therefore, the present invention is aimed at the forklift with the fork operated by the manual control valve, can effectively improve the safety performance when the fork is operated, and can also greatly improve the working efficiency.

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Abstract

The invention discloses a safety control system for controlling the fork of a forklift with a manual valve, which is to receive the angle signal of the fork detected by the inclination angle sensor of the fork, the load signal detected by the load sensor on the fork, and the height sensor through the controller. The detected height signal of the fork controls the on-off of the two-position three-way valve for tilting and lifting, and realizes the buffering function of the limit position of the fork, the limit function of the forward tilt angle of the fork, and the limit function of the backward tilt speed of the fork. The invention can realize the safety control of the forward tilt angle and the backward tilt speed control of the cargo fork under different loads and different heights, thereby improving the safety of the driver during operation.

Description

technical field [0001] The invention belongs to the field of forklifts, and is a safety control system for a forklift operated by a traditional manual valve. Background technique [0002] Forklift is a common cargo handling vehicle, which is widely used in ports, airports, factory workshops, warehouses, etc. With the development of the economy and the advancement of science and technology, forklifts have replaced manual handling and become an indispensable part of the development of modern industry. Therefore, the demand for forklifts in my country has also increased rapidly. The safety has not been improved when the forklift is shoveling goods, which is mainly reflected in the fact that when the forklift is shoveling goods, if the fork is tilted forward or backward too much, the goods will fall and hurt pedestrians or drivers; when the fork tilts back too fast and the height of the goods is too high The cargo will fall and injure the driver. Contents of the invention [0...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B66F9/22B66F9/075B66F17/00
CPCB66F9/22B66F9/07504B66F17/003
Inventor 夏光张华磊夏岩陈建杉李嘉诚于星海纵华宇汪韶杰孙保群
Owner HEFEI UNIV OF TECH
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