Modified screw jack for lifting operation in industrial setting. The subject of research was scissor jack of mahindra bolero. Design and standardization of scissor jack to avoid field failure. More powerful jacks use hydraulic power to provide more lift. Modified screw jack for lifting operation in industrial. The mechanism is dedicated to passenger vehicles with an unload weight not exceeding 2 ton. Detailed design procedure of a quick lifting screw jack is presented in this paper. This paper mainly focused on designing and standardization of scissor jack model of automobile l. Scissor jack lift the load due to which the rotation motion is converted into linear motion and due. Jack that this piece of equipment will meet your expectations in quality and performance.
Design modification and failure analysis of scissor jack ijernd. The jack is working on the scissor lifting mechanism. For safety design weight is taken as 400 kg or 4000n. Platform this is the top of the lift table where lifted product sits. In the case of a screw jack, a small force applied in the horizontal plane is used to raise or lower large load. The power screw design of a common scissor jack reduces the amount of force required by the user to drive the mechanism. Solidworks tutorial design and assembly scissor lift in. Scissor lift design is used because of its ergonomics as compared to other heavy lifting devices available in the. We began with an alpha design and purchased the hydraulic lift figure 1.
Of the 8 d components, 4 will be drilled in a 61010mm pattern while the remaining 4 are drilled in a 6106mm pattern 6 and 10 referring to hole size as shown in the above diagram. Design and analysis of hydraulic scissor lift by fea. Introduction 1a scissor lift is a vertical lifting device that consists of a platform. Design and development of smart speed breaker ijariie. Kansas city, mo 64153 phone 18168916390 90 days limited warranty for a period of ninety 90 days from date of purchase, sfa companies will. Scissor or toggle jack a toggle or scissor jack is a device which lifts heavy equipment. A p p l i e d m echan e ornal of pplied j mechanical. Scissor lift design calculation chicopee mechanical 8 may 17 14. Scissor jacks are simple mechanisms used to drive large loads short distances. Imagine you work for a company that designs and manufactures scissor lifts, where each scissor lift you design is the same but different. Catia is used to develop and analyzed the scissor jack. A wide variety of scissor lift mechanism design options are available to you, such as scissor lift, articulated lift, and lift chain.
The end fits into a ring hole mounted on the end of the screw, which is the object of force on the scissor jack. Pdf scissor lift design for use in the automotive industry. The goal of the study is to design the hydraulic scissors lift to lift up to a height of 1. The hydraulic lift was chosen as a subject of the thesis because it is a perfect example of mechanical engineering field. The power screw mechanism included in a scissor jack is design to lower the amount of force needed to lift the heavy loads. Simulative calculation and optimal design of scissor lift mechanism free download as pdf file. Mechanics and machine design, equations and calculators. Pdf design and analysis of hydraulic scissor lift by fea.
The scissor jack supports quarter of total vehicle mass only, which lies between 300 kg3000n to kg0n. Scissor jack mechanism in the scissor jack mechanism, the bumps are rises by upward motion of scissor jack which is provided just below the bump. Hydraulic scissor lift, hydraulic cylinder, scissor arm, top platform. The most common form is a car jack, floor jack or garage jack, which lifts vehicles so that maintenance can be performed. In this tutorial, we will be automating the creation of a scissor lift. Kinematic design and fabrication of four bar mechanism to steer a. Design and standardization of scissor jack to avoid field. The mechanism incorporated to achieve this function is the use of linked, folding supports in a crisscross pattern, known as a pantograph.
Most scissor jacks are similar in design, consisting of four main members driven by a power screw. A jackscrew is a type of jack which is operated by turning a lead screw. Nikam4 1,2,3 department of mechanical engineering, savitribai phule pune university, amrutvahini college of engineering, sangamner. Scissor lift jack equations and loading calculator. Jme 4110 mechanical car jack open scholarship washington. The power screw design of a common scissor jack reduces the amount offorce required by the user to drive the mechanism. A scissor jack is mechanical equipment used to lift up heavy loads. Conventionally a scissor lift or jack is used for lifting a vehicle to change a tire, to gain. Product title zimtown 2 ton scissor jack heavy duty folding design lift car tire repair lift tool average rating.
A scissor jack is a device constructed with a crosshatch mechanism, much like a scissor. A wide variety of scissor mechanism options are available to you, such as scissor lift, telescoping lift, and articulated lift. Scissor lifts are widely used in industrial applications, and also form a staple design. Mar 11, 2015 more powerful jacks use hydraulic power to provide more lift over greater distance. Scissor jack 1 12 ton capacity american made order on line or call 800 535 2257. A scissor jack is a mechanical device used to lift a heavy vehicle from the ground for changing the wheel and. Pdf design and standardization of scissor jack to avoid field.
The means may be provided by a hydraulic cylinder and a bell crank mechanism. Scissor jack lift the load due to which the rotation motion is. This means a custom design needs to be produced for each sales enquiry or order. Designing and calculating the stresses induced in scissors jack. Lift tables can also be driven by pneumatic sources. A commercially available scissor jack is shown in figure 1. A scissor jack is a device constructed with a crosshatch mechanism, much like a scissor, to lift up a vehicle for repair. Scissor lifts owe their mechanical capability to the pantograph. Most scissor jacks are similar in design, consisting of four main members driven by a power screw 7 9. Two pairs of equal links are selected to design and fabricate the steering mechanism for hpv obeying grass offs criterion. Bacon 4 scissors lift platform with electronic controlarturo valencia ochoa jaime antonio uribe. A jack is a mechanical lifting device used to apply great forces or lift heavy loads.
A mechanical jack employs a screw thread for lifting heavy equipment. The most common form is a car jack, floor jack or garage jack which lifts vehicles so that maintenance can be performed. Calculations of the inner stresses must be done and a 3d model must be created. Pdf a scissor jack is a mechanical device used to easily lift a vehicle. Lift tables may incorporate rotating platforms manual or powered.
The construction and load distribution represent statics. The power screw is the heart of scissor jack and scissor jack lift the load with the help of screw and nut. In the remaining sections the design issues listed above are discussed. The force applied to extend the scissor mechanism may be hydraulic, pneumatic or mechanical via a lead screw or rack and pinion system. Scissor lifts, as depicted in figure 1, are a type of mechanism that allows for vertical displacement of some load, through the use of linked, folding supports, in a crisscross x pattern, referred to as a pantograph or, simply, a scissor mechanism. Scissor jack a scissor jack is operated by turning a lead screw. The bell crank mechanism redirects the force from a hydraulic cylinder to a. Conventionally a scissor lift or jack is used for lifting a vehicle to change a. Base this is the bottom of the structure that rests on the floor. It is also known as a screw jack, and is commonly used as carjacks. Mar 20, 2018 the most common lift table design incorporates hydraulic cylinders and an electrically powered pump to actuate the scissor lifting mechanism. This scissor jack is a high quality import distributed by u.
Scissor lift design calculation mechanical engineering. Consisting of four main members driven by a power screw a scissor jack is operated simplyby. Two pairs of equal links are selected to design and fabricate the steering mechanism for. This mechanism combines a result of several main fields of engineering and at the same time, it is simple and accessible for understanding. Scissor jacks are simple mechanisms used to handle large loads overshort distances. Hydraulic scissor lift tables are comprised of five major components. The length and width of the scissor lift can be changed. Mathematical model of design procedure is also made which will suppose to help in standardization of scissor jack design by using matlab. A scissor lift jack or mechanism is device used to extend or position a platform by mechanical means. Modified screw jack for iifting operation in fndustrial setting benjamin bzurike1a.
Mig welding welding table metal welding garage lift lifting platform lift design lift table diy tools scissors. The driving mechanism of the lift must be a hydraulic cylinder. Various parts used in scissor jack mechanism are listed below fig 3. Other design concepts generated include the wheel locking mechanism, button type, lean bar design, seat implementation, and power cord containment. The design is fundamentally a modification of the conventional scissor jack. When this crank is turned, the screw turns, and this raises the jack. Simulative calculation and optimal design of scissor lift. Initial figure of model was designed in catia v5 showing the correct operation of the jack and range of mobility. A scissor lift relies upon the elongation of a collapsile mechanism to provide vertical elevation in ratio to a rotational or linear input. Pdf design and fabrication of hydraulic scissor lift. 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.
We also keen at reducing the weight of scissor jack at the same time maintaining its. Design and analysis of scissor jack full report download. Most scissor jacks are similar in design, consisting. Car jacks usually use toggle advantage to allow a human to lift a vehicle by manual force alone. The lift is raised and lowered by a means for providing a generally vertical force to the shaft. Car jacks usually use mechanical advantage to allow a human to lift a vehicle by manual force alone.
Design modification and failure analysis of scissor jack. These devices are widely utilized and are capable of lifting significant loads safely and efficiently. A scissor jack is operated simply by turning a small crank that is inserted into one end of the scissor jack. The paper describes the design as well as analysis of a hydraulic scissor lift having two levels. For a scissor lift that has straight, equallength arms, i. The scissor lift can be used in combination with any of applications such as pneumatic, hydraulic, mechanical, etc. A scissor lift mechanism for use on a coil car or the like, the lift having scissor legs connected to each other by a shaft. Design and standardization of scissor jack to avoid field failure c. More powerful jacks use hydraulic power to provide more lift over greater distance.
Car jack is a device used to lift up the cars while. It has teeth the screw thread, which turn and move the two arms. The operation of a scissor jack starts by using a z shaped crank that is mounted to a small hole on the mechanism. Pdf design and analysis of scissor jack firaol asefa.
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