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Control method for preventing rollover of counterbalance forklift truck

A control method and anti-rollover technology, which is applied in the direction of hoisting equipment safety devices, lifting devices, etc., and can solve problems such as hidden dangers to the safety of operators and cargo, rollover, and large lateral acceleration.

Active Publication Date: 2021-05-18
HEFEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the unique structure of the rear axle swing is also the main reason why the forklift is prone to instability during manipulation.
During the rollover process of the forklift, due to the excessive lateral acceleration caused by the violent steering behavior, the forklift lifts from the inner front drive wheel, and gradually deteriorates to the front and rear unilateral wheels leaving the ground, until finally causing rollover, resulting in injuries to operators and goods. Security risks

Method used

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  • Control method for preventing rollover of counterbalance forklift truck
  • Control method for preventing rollover of counterbalance forklift truck
  • Control method for preventing rollover of counterbalance forklift truck

Examples

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Embodiment

[0110] Embodiment: the anti-rollover control method of forklift trucks of the present invention is applied to a certain type of 3-ton counterbalanced forklift. s =4300kg, moment of inertia I of the whole vehicle around the Z axis z =6129kg·m 2 , the moment of inertia of the frame around the X axis I x =3100kg·m 2 , height h of body center of mass s =0.75m, the height of the center of mass of the rear axle is equal to the height of the hinge point of the rear axle h r = h u0 =0.265m, the distance between the front axle and the center of mass a=1m, the distance between the rear axle and the center of mass b=0.7m, the wheelbase B=1m, the maximum swing angle of the body relative to the rear axle The locked state of the hydraulic support oil cylinder refers to the PWM duty cycle signal with the control signal of the solenoid valve of the oil cylinder being 0%, the semi-free state refers to the PWM duty cycle signal with the control signal of the solenoid valve of the oil cyli...

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Abstract

The invention discloses a control method for preventing rollover of a counterbalance forklift truck. The rollover state of the forklift truck is judged at the moment according to forklift truck dynamic motion data acquired by a forklift truck body attitude sensor; and different energy grading indexes are adopted in different rollover states, accurate identification of the rollover prevention stability of the forklift in different rollover states can be achieved, and a basis is provided for rollover prevention control. According to the control method for preventing rollover of the counterbalance forklift truck, an anti-rollover supporting oil cylinder and full-hydraulic active steering are adopted according to the judged different rollover states of the forklift, accurate and real-time anti-rollover control is carried out according to the forklift anti-rollover stability recognized through real-time rollover energy, and the anti-rollover stability and the active safety of the forklift are improved.

Description

technical field [0001] The invention relates to the field of stability control of a counterweight forklift, in particular to a control method for anti-rollover of a forklift. Background technique [0002] As counterbalanced forklifts are widely used in factories, ports, stations, warehouses and other major transportation and logistics industries, their working environment is becoming more and more complex. Since the forklift is an engineering vehicle with a high center of gravity, and if the turning radius is too small and the vehicle speed is too fast during its work, the forklift body will roll seriously. If it is not controlled, it is prone to forklift rollover accidents. Therefore, it is of great significance to improve the anti-rollover stability of the forklift during work. [0003] The front wheel of the counterbalanced forklift is the driving wheel, and the rear wheel is the steering wheel. Due to the hinge point between the rear steering axle and the body, the bo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B66F9/075B66F17/00
CPCB66F9/075B66F17/003
Inventor 夏光李嘉诚夏岩张华磊陈建杉于星海张洋汪韶杰孙保群
Owner HEFEI UNIV OF TECH
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