Keywords scissor lift, screw jack, hydraulic lift, pneumatic lift, mechanical lift i. Dump bed lifting mechanism zachary pate central washington university. The main components of scissor lift are bottom and top frame, scissor arm, link connector and cylinder. Manually propelled scissor lifts are covered by ansi 92. The most important fact of a jack is that, it gives the user a mechanical advantage by changing the rotational motion into linear motion and allowing user to lift. The lift mechanism that was eventually built and implemented was a 3level scissor lift. Design modification and failure analysis of scissor jack. The base frame of the lift has predrilled holes for lagging the lift securely to the floor. This mechanism is achieved by the use of link, folding support in crisscross pattern known as a pantograph. Evolution of main actuation mechanisms for scissors lifting tables courtesy 1 the present work has focused on the design of a belt drive scissor lifting table to be install on platforms, called skillet. Lifting mechanisms for dump trucks are too large and expensive for use on a small. In major cities, you will often see scissor lift tables used as platforms for maintenance and construction. Pdf design and fabrication of hydraulic scissor lift.
Most scissor lift designs have much greater strength over the ends of the lifts than they have over the sides of the lifts. The uniqueness of each work access lift application rules out any standard lift. Design and analysis of new flexible and safe forklifts abstract in todays life, there is a wide variety of forklifts, from the large heavy. Scissor lift jack equations and loading calculator engineers edge. In addition, a scissor lift is suitable for use in situations, where movement of other types of lifts is limited. To avoid traffic problems, we need a mechanism that can lift. Pdf the paper describes the design as well as analysis of a hydraulic scissor lift having two levels. The lever is a link, the fulcrum a joint, and the ground is also a link. International journal of engineering research and general. For a stable scissor jack platform, the weight of the scissor. The scissor lift mechanism is based on linked arms in a crisscross x pattern which can be folded and extended in exact direction similar to a pantograph. Without checking the calculations, some discrepancies are clear. Pdf design and analysis of scissor lifting system by using finite. Simulative calculation and optimal design of scissor lift mechanism free download as pdf file.
Some scissor lift tables are used as weight platforms to weigh machinery and other mechanisms. An investigation on the dynamic stability of scissor lift. Design and fabrication of mechanical lift for transportation. A 3d model of scissor lifting mechanism was established with proe. The base frame of the lift has predrilled holes for lagging the lift.
Scissors lift platform with a wide range, the main platform, lift mechanism and the bottom are composed of three parts. This is where the lift is in the closed position and has the greatest forces required to lift. Desing and calculation of the scissorestype elevating platforms beqir hamidi faculty of mechanical engineering, university of pristina abstract. The scissor lift table can raise a forklift so that maintenance to the underneath of the forklift can be performed. In this tutorial, we will be automating the creation of a scissor lift. Lightweight hybrid scissor li provide answers for weightrestricted jobsites. Simulative calculation and optimal design of scissor lift. From these equations it was discovered that prudent placement of a lifts.
The upward motion is achieved by the application of pressure to the outside of the lowest set of supports, elongating the crossing pattern. Scissor jacks are simple mechanisms used to drive large loads short distances. The power screw design of a common scissor jack reduces the amount of force required by the user to drive the mechanism. Scissor lift jack equations and loading calculator. Design and analysis of new flexible and safe forklifts. Just by turning this screw thread, the scissor jack can lift. Pdf on mar 1, 2018, cengiz gorkem dengiz and others published design and analysis of scissor lifting system by using finite elements. Introduction nowadays, on heavy traffic roads or highways, if there is any technical problem in a car there are traffic issues.
Pdf design and analysis of scissor lifting system by. Mig welding welding table metal welding garage lift lifting platform lift design lift. One possible way of calculating the reaction forces throughout the lift is to begin at the top of the lift. Scissor lift design calculation mechanical engineering. Lifting from low to high lifting, the scissors posts, and the hydraulic. This capability makes this type of lift particularly versatile and convenient. The aim of this paper is design, analysis and to fabricate a hydraulic scissor lift which lifts maximum 2000kg load with minimum time. A scissor lift jack or mechanism is device used to extend or position a platform by. Simulative calculation and optimal design of scissor lift mechanism. Scissor lift design calculation chicopee mechanical 8 may 17 14. International journal of engineering research and general science volume 3, issue 2, part 2, marchapril, 2015. Floorloading solutions the custom equipment hybrid hb1030 scissor lift is light enough to ride over access by katie parrish sub c on tr aors he. The jack is working on the scissor lifting mechanism.
A platform with load is movable not only vertically, but. Analysis and optimization of hydraulic scissor lift. Design and analysis of hydraulic scissor lift by fea. One possible way of calculating the reaction forces throughout the lift is to begin at the top of the lift where the applied loads are known, and, using equations of static equilib. Hydraulic scissor lift, hydraulic cylinder, scissor arm, top platform. Hydraulic lift, scissors lift, lifting table, scissors calculations. Abstractin this paper scissor lifts powered by gear mechanism has been introduced. Executive summary the focus of this project is to design and build a lift for surgeons in the operating room. To avoid personal injury, never go under the lift platform until the load is removed and the scissors mechanism is securely blocked in the open position. To help develop more effective methodsstrategies for preventing scissor lift tipover, the objective of this study is to enhance the understanding the major mechanisms and factors influencing tipover. A scissor lift is the type platform that can usually move vertically. Scissor jack lift length is proportional to the weight of the scissor support weight and integrity of the steel cross sections more than the length. For this reason, we prefer to see loads travel over the ends of lifts, parallel to the lift legs, rather than over the sides when the lifts. The lever is a 2bar linkage the simplest mechanism, and perhaps the first, is a lever and a fulcrum.
Pdf design and analysis of hydraulic scissor lift by fea. Scissor lift calculation free download as pdf file. Simulative calculation and optimal design of scissor. In order to analyze the forces throughout the lift structure, a set of mathematical equations was derived. Hydraulic scissor lifts are used very popularly due to their ability to bear heavy load operations. Step by step procedure on how to model a scissor lift mechanism assembly in design modeler and do a rigid dynamic analysis in ansys workbench. Design of hydraulic scissors lifting platform core. Design, analysis and development of hydraulic scissor liftijaerd. The power screw is the heart of scissor jack and scissor jack lift the load with the help of screw and nut interaction of power screw and middle pin. Second, apples and oranges comes to mind, because guys suggestion shows the horizontal force, and hmcks suggestion shows a force aligned with the inclination of the scissor.
Use the lift as a deck extension during a major renovation or project. The components of gear powered scissor lift are spur gears, scissor arm, platform, one horse power electric motor. Imagine you work for a company that designs and manufactures scissor lifts, where each scissor lift you design is the same but different. Simulative calculation and optimal design of scissor lifting mechanism. Hydraulic scissor lift table report linkedin slideshare. It has teeth the screw thread, which turn and move the two arms, producing work. Introduction 1a scissor lift is a vertical lifting device that consists of a platform. Hydraulic scissor lift, hydraulic cylinder, scissor arm, top. Mechanics and machine design, equations and calculators. Pdf design and fabrication of hydraulic scissor lift researchgate. Design and construction of hydraulic scissor lift inpressco. When this crank is turned, the screw turns, and this raises the jack. For a scissor lift that has straight, equallength arms, i.
A scissor jack is a mechanical device used to lift a heavy vehicle from the ground for changing the wheel and for maintenance purpose. C le he h c en ter p roj c a equ ied o use hybr d sc issor l fts. Lift tables may incorporate rotating platforms manual or powered. First, guys suggestion does take into account the weight of the scissor arms.