Accident forkliftSeveralReason analysis andThe improved scheme

                           Liang Fengxi ShandongMiningCollege Qingdao 266510

Abstract: described in today's social life and production, several common and causes of forklift accident, according to the analysis of the reasons put forward the improvement scheme, and analyze the rationality of the application.

Keywords: forklift, accident, electromechanical control, improvement

Clc:TH    Document code:A

SeveralReasonsAnalysisAndImprovementProjectsOf那个ForkliftAccident 

XIConfident

ShandongUniversityOfScienceAndTechnology  CollegeOfMechanicalAndElectronicEngineering Qingdao266510

Abstract:DescribedInToday'sSociety,那个CommonAccidents OfForkliftOccurredSeveral WaysAndReasons,InViewOf那个AnalysisOf那个ReasonsPutForward那个ImprovementScheme,AndAnalyze那个ApplicationOfRationality.

KeyWords:Forklift, accidents,ElectromechanicalControl,Improvemen

Introduction: along with the development of modern civilization, forklift is used more and more widely, it has been from the past port into the whole society. Forklift in certain market demand in China, especially in the internal logistics and transport enterprises, forklift has increasingly shown its role. Logistics forklift has become indispensable tools in today's social production and people's life.It has a high degree of mechanization, flexibility is good, can"The use of a machine"Etc.. And has the advantages of improving the utilization rate of warehouse space, the stacking height can reach4-5M,Conducive to the development of the tray group transportation and container transportation advantages, more important is compared with the large hoisting machinery, its low cost, less investment, can get better economic effect.

Although the forklift has superiority so, but inevitably there are some defects, leading to some forklift wounding occur frequently in everyday life accident.

  According to daily observation as well as the news media reported, I put the forklift attack mainly summarized as follows:

1,The driver in parkingNo.TimelyLower fork, lead to pedestrian mistakenly hit arrival fork caused accidents;

2,Load relatively large objects blocking the line of sight, caused by charging events;

3,Overloading of trucks"On his face"Lead to heavy slipping and wounding incident;

4,Forklift fork due to fatigue damage caused by the rupture accident.

  According to the professional knowledge and understanding of their own, some of my own opinion on these problems, and sums up the solution:

I, forThe driver in parkingNo.TimelyLower forkThis behavior, I think the fork at the bottom of a travel switch, the driver in the parking stall, the control circuit is turned on, to judge whether the landing fork, if there is no landing can send alarm. Control chart is shown as follows:

                         Block diagram

                           Electric drive control chart

S1Connected with the starting switch, forklift truck engineS1Turn on.

There is a better solution is to use the fork truck after folded in front, with a hydraulic cylinder, of course it will increase the cost of production.

Second, for theLoad a large object blocking the view of this problem, although not common the problem, and the driver can avoid this problem by improving the fork height. But in some high limit cases, this method can not solve the real problem. From the energy saving and environmental protection point of view, improve the fork height does not meet the national energy-saving emission reduction the call. I think that the installation of a similar periscope on the body (with a convex mirror can expand the horizons of the telescopic mechanism), can solve the current problems. This mechanism can be controlled in two ways: first, the telescopic cylinder or stepper motor, when not in use to shrink or folded; secondly, using a rotating mechanism, when not in use and rotate it to the back of the vehicle body. The effect will be better.

Of course the mirror into the camera monitoring system, can better ensure the vision, but it will be a corresponding increase in the cost of.

III, for forklift truck overloading "face" and fork for fatigue damage and fracture of these two kinds of circumstances, can be attributed to the same reasons: "overload". Because the lifting mechanism of the fork is composed of chain wheel, chain and drives the shelf lift lifting oil cylinder. According to this principle, I think can be improved through two methods : first, increase a similar to the "torque wrench" agencies in the sprocket to limit the lifting weight; second, give full play to the lifting of overflow valve cylinder in the role, to ensure that the system is overload, overflow valve to open, to avoid the accident.

Conclusion: the good transformation of forklift, can effectively reduce the occurrence frequency of production accidents, and can play the purpose of energy saving, has important significance for the actual production.

Reference.

[1]Deng Xingzhong.Electric drive control (Fourth Edition)[M]Wuhan: Huazhong University of Science and Technology press,2007

[2]Xiao Yongqing Wang Bengang.Forklift repair and maintenance examples[M]Beijing: chemical industry press,2006

[3]Wang Jiwei, chapter Hongjia, Huang Yi.Hydraulic transmission (article2Version)[M]Beijing: mechanical industry press,2006

[4]Sun Huan Chen Zuomo Ge Wenjie.Mechanical principle (7th Edition)[M]Beijing: higher education press,2006

[5]Pu Liang GUI, Ji Minggang.Mechanical design (Eighth Edition)[M]Beijing: higher education press,2005