More powerful jacks use hydraulic power to provide more lift over greater distance. Modified screw jack for lifting operation in industrial. The most common form is a car jack, floor jack or garage jack. Lead brand scissor jack is a fast and laborsaving design, load 1. Most scissor jacks are similar in design, consisting of.
The jacks with wedge mechanism had introduced in nigeria because. The power screw design of a common scissor jack reduces the amount of force required by the user to drive the mechanism. The hydraulic lift was chosen as a subject of the thesis because it is a perfect example of mechanical engineering field. Designing and calculating the stresses induced in scissors jack.
A jack is a mechanical lifting device used to apply great forces or lift heavy loads. A scissor jack is a device constructed with a crosshatch mechanism, much. The mechanism was analyzed numerically, at maximum lift height of 300mm. Mechanics and machine design, equations and calculators. Bacon 4 scissors lift platform with electronic controlarturo valencia ochoa jaime antonio uribe. Scissor lift design calculation mechanical engineering. With numerous benefits, it is tagged as one of the popular equipment used. Also the new design that made by proe software can be tested by ansys software.
Design of mechanisms with scissor linear joints for swept. Most scissor jacks are similar in design, consisting of four main members driven by a power screw. Each arm of the crosses is called a scissor arm or scissor member. The terms scissor comes from the mechanism utilized which is configured with linked, folding supports in a crisscross x pattern.
The end fits into a ring hole mounted on the end of the screw, which is the object of force on the scissor jack. The jack is designed on the basis of measurements taken from a real jack. Introduction 1a scissor lift is a vertical lifting device that consists of a platform. The geometry is solved using the cosine rule and lifting forces and efficiencies. A jack is a device that uses force to lift heavy loads. A scissor jack is a device constructed with a crosshatch mechanism, much like a scissor. A scissor jack is a mechanical device used to lift a heavy vehicle from the ground for changing the wheel and for maintenance. Although i am making up the majority of them as i go along. Scissor jacks are simple mechanisms used to drive large loads short distances. Scissor lift jack equations and loading calculator engineers edge. Scotch yoke mechanism design, 48 pages an experienced mechanical engineer was asked to design a smooth reliable drive to oscillate a long slender induction coil gently and continuously. Nikam4 1,2,3 department of mechanical engineering, savitribai phule pune university, amrutvahini college of engineering, sangamner. 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 arms.
Conventionally a scissor lift or jack is used for lifting a vehicle to change a tire, to gain. Establish the sizes of the linkages and specify dimensions and location of joints. The bottom is enlarged, the top steel column can be disassembled 4. The most common lift table design incorporates hydraulic cylinders and an electrically powered pump to actuate the scissor lifting mechanism. First, guys suggestion does take into account the weight of the scissor arms. Deng hongguang optimized the key parameters of the scissors mechanism by analyzing the mechanical characteristics, and provided reference for the design of scissors mechanism 6. Looking for a scissor lift for an atv or bike instead. Also the new design that made by solidworks software can be tested by. Scissor jack definition is a powerful lifting jack operated by a screw in horizontal position that lengthens or shortens the horizontal diagonal of a parallelogram consisting of the linkages of the jack. Mathworks is the leading developer of mathematical computing software. Each cad and any associated text, image or data is in no way sponsored by or affiliated with any company, organization or realworld item, product, or good it may purport to portray. A scissor jack is mechanical equipment used to lift up heavy loads. Jackamn vertical cross hatch mechanism similar to that of a scissor so.
The coil serves as a precision control element in a large linear accelerator. Using the three dimensions simulation software proe, the mechanism design and simulation about the equipment of the scissors lift platform can be done just like the structures depicted upwards. The operation of a scissor jack starts by using a z shaped crank that. Scissor jack design project free download as word doc. The driving mechanism of the lift must be a hydraulic cylinder. Design and simulation based on proe for a hydraulic lift. Applications of hydraulic scissor lift a scissor life table has many useful purposes. Imagine you work for a company that designs and manufactures scissor lifts, where each scissor lift you design is the same but different.
Pdf design and fabrication of hydraulic scissor lift. This was a learning process in itself and i found it very useful to just design something for myself after doing the instructables class to become more familiar with the software. Scissor lift design calculation sparweb aerospace 5 may 17 04. Computeraided design cad software allows the development of threedimensional 3d. Part a of the case consists of an account of the first and second designs. The computeraided design cad files and all associated content posted to this website are created, uploaded, managed and owned by third party users. Car jack is a device used to lift up the cars while changing the tires. Pit posse motorcycle atv scissor floor jack lift table stand with caster wheels inches thru 36inchhigh. Hello everyone i am working on a design at the moment using inventor 2012. I think that the whole debate exists due to lack of clear communication. The design is fundamentally a modification of the conventional scissor jack. Design and standardization of scissor jack to avoid field. The design was proved to be scientific and reasonable and could serve as the theoretical guidance and reference for the design of scissor lifting mechanism of other uses.
Lift tables may incorporate rotating platforms manual or powered. The primary mechanism with which force is applied varies, depending on the specific type of jack, but is typically a screw thread or a hydraulic cylinder. Basic convertible roof design for the year 2 project. Scissor or toggle jack a toggle or scissor jack is a device which lifts heavy equipment. The design of the mechanism was optimized in promechanical based on the findings from simulation analysis, which may guide and improve the further design. Design and analysis of scissor jack full report download. A scissor jack is operated simply by turning a small crank that is inserted into one end of the scissor jack. Reuse mechanism components to model a fourstage scissor lift. These scissor jaw toys use a simple mechanism which i wanted to try to recreate in fusion using the joint features.
Alibre design archicad autocad autocad electrical autodesk 3ds max. The term scissor comes from the mechanical configuration, which is based on linked, folding supports disposed as a crisscross x pattern. Scissor lift design is used because of its ergonomics as compared to other heavy lifting devices available in the. Kansas city, mo 64153 phone 18168916390 90 days limited warranty for a period of ninety 90 days from date of purchase, sfa companies will. Initial figure of model was designed in catia v5 showing the correct operation of the jack and range of mobility. A commercially available scissor jack is shown in figure 1. The results showed that the introduction of the crank and gear mechanism would help reduce difficulty in operation, reduce time, increase efficiency and effectively control. Scissor lift jack equations and loading calculator. Comparing mathematical model of scissors jack analytically. Pneumatic scissor lift jack project nevon projects. Pdf analysis and modification of scissor jack international. It is a mechanical device which is used to lift the limited load on desired position. The paper describes the design as well as analysis of a hydraulic scissor lift having two levels. The mechanism incorporated to achieve this function is the use of linked, folding supports in a crisscross pattern, known as a pantograph.
Design of hydraulic scissors lifting platform, 41 pages. Target the critical linkage, where max stress may occur. The extension or displacement motion is achieved applying of force to one of the supports resulting and an elongation of the crossing pattern. Scissor lifts, a staple of mechanical design, especially in competitive robotics, are a type of linkage that can. Change a tire quickly and securely with the help of a scissor lift. Dims specs of which i must design to are as follows. Introduction the scissor jack is the one of the most important mechanical component used for lifting of load in application such as cars, lifts.
Pdf design and standardization of scissor jack to avoid field. The design is based on 3d software proe with 8m high scissors lift. We also keen at reducing the weight of scissor jack at the same time maintaining. In this tutorial, we will be automating the creation of a scissor lift. The power screw mechanism included in a scissor jack is design to lower the amount of force needed to lift the heavy loads. This means a custom design needs to be produced for each sales enquiry or order. Scissor jack definition of scissor jack by merriamwebster. A mechanical jack employs a screw thread for lifting heavy equipment.
The subject of research was scissor jack of mahindra bolero. Calculations of the inner stresses must be done and a 3d model must be created. Scissortype jacks are frequently used as lifting systems. Design and analysis of hydraulic scissor lift by fea. Design modification and failure analysis of scissor jack. Most scissor jacks are similar in design, consists of four lifting arms, a base. Simulative calculation and optimal design of scissor. Hydraulic scissor lift, hydraulic cylinder, scissor arm, top platform.
Comparing mathematical model of scissors jack analytically and by. The mechanism is dedicated to passenger vehicles with an unload weight not exceeding 2 ton. Car jacks usually use toggle advantage to allow a human to lift a vehicle by manual force alone. The joint system in fusion 360 is more than just constraints, or mates as they are called in other software packages. The length and width of the scissor lift can be changed. The goal of the study is to design the hydraulic scissors lift to lift up to a height of 1.
It has teeth the screw thread, which turn and move the two arms, producing work. This paper mainly focused on designing and standardization of scissor jack model of automobile l. Dynamic analysis of scissor lift mechanism through bond. A scissor lift jack mechanism is a mechanical device used to lift up or down an upper platform. Scissor lifts are widely used in industrial applications, and also form a staple design element in competitive robotics. A scissor lift mechanism uses a longitudinal thrust to lift a vertical load. Design and animation of scissor lifitng table mechanical. For a scissor lift that has straight, equallength arms, i. Define rigid bodies and assemble them to model a scissor mechanism. A scissor lift jack or mechanism is device used to extend or position a platform by mechanical means. The scissor lift can be used in combination with any of applications such as pneumatic, hydraulic, mechanical, etc. No, i dont find it limited, specifically for such simple designs. When this crank is turned, the screw turns, and this raises the jack.