Scissor lift jack equations and loading calculator. The compact size and the light weight make it easy to position and the handle design makes it easy to lift. Lift mechanism and geometry the complete system model of the scissor lift mechanism shown figure1. Scissor lift mechanism mechanical engineering general. This means a custom design needs to be produced for each sales enquiry or order. For a scissor lift that has straight, equallength arms, i. Scissors mechanism gbc module design by dawid marasek building instructions from turbopolofr version 1.
Design and kinematic analysis of the car jack tem journal. Summary the scissor jack design, shown in figure 1, consists of four main lifting members, four connection members, a power screw and a crank. The goal of the study is to design the hydraulic scissors lift to lift up to a height of 1. Design a portable car lifting system that will lift all four wheels of a vehicle off the ground a few inches for tire rotations. The design is fundamentally a modification of the conventional scissor jack. A hydraulic scissor lift is a mechanical device used for lifting of the loads to a height or level. Compact in size, this scissor jack is a compact in size, this scissor jack is a great light weight jack for the garage or carry in your automobile. Scissor lift design is used because of its ergonomics as compared to other heavy lifting devices available in the. This mechanism is incorporated with a power screw and the top of the scissors is attached a table platform.
Jme 4110 mechanical car jack washington university open. Most scissor jacks are similar in design, consisting of four main members driven by a power screw. How to make your own diy scissor lift with plans woodwork. Momin and rohanhatti, design, manufacturing, and analysis of hydraulic scissor lift, international journal of scientific engineering and applied science ijseas, vol. A mechanical jack employs a screw thread for lifting heavy equipment. The scissors see figure 1 are used to cut various thin materials such as paper and cloth. We also keen at reducing the weight of scissor jack at the same time. Detailed design procedure of a quick lifting screw jack is discussed. When this crank is turned, the screw turns, and this raises the jack. The power screw mechanism included in a scissor jack is design to lower the amount of force needed to lift the heavy loads. Chapter 1 introduction to mechanisms and machines 7 virtual making things move.
Scissor jack mechanism design wholesale jack alibaba. Lack of specific standards for industrial scissor lifts and tilters caused confusion with manufacturers, users and various governing bodies. Members 1 and 5 both have additional details to account for the contact surfaces. A hydraulic mechanical jack employs the mechanism of a hydraulic power system in the lifting of heavy equipment brian, 2006. The scissor lift can be used in combination with any of the previously mentioned application, i. Pdf dynamic analysis of scissor lift mechanism through bond. A scissor jack is mechanical equipment used to lift up heavy loads. Pdf design and standardization of scissor jack to avoid field. The operation of a scissor jack starts by using a z shaped crank that is mounted to a small hole on the mechanism. A scissor jack is operated simply by turning a small crank that is inserted into one end of the scissor jack. A hydraulic jack is a mechanical device used as a lifting device to lift heavy loads or apply great forces. You are right, never thought one would design a scissor mechanism with negative mechanical advantage, since you need 5x the weight to lift it. Us3785462a scissor lift and drive mechanism therefor.
The machine consists of a mechanism, the platform and screw and scissor mechanism. The power screw design of a common scissor jack reduces the amount of force required by the user to drive the mechanism. The parts of this mechanisms are rampa, platform, scissor links, revolute and slider joints, hydraulic cylinder and base port. Final design for our final product we decided to use the following concepts. This design comprises a mechanism in order that the car door window makes a specified translational motion. It has teeth the screw thread, which turn and move the two arms. Lift tables may incorporate rotating platforms manual or powered. 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.
Screw jack and scissor lift concept 3 overall dimensions tentative. The trolley lifting mechanism is adopted to lift the trolley to the required angle after turning it. Get 2021 top innovative ideas for mechanical engineering projects for study and research. Afterwards, detailed design of the chosen concept is given. Conventionally a scissor lift or jack is used for lifting a vehicle to change a tire, to gain. The jack shown at the right is made for a modern vehicle and the notch fits into a jack up point on a unibody. Scissors lift equations engineers edge engineering forum. Earlier versions have a platform to lift on a vehicles frame or axle. Scissor lift design calculation chicopee mechanical 8 may 17 14. Scissors jack design project pdf meta search engine.
For a stable scissor jack platform, the weight of the scissor structure and length are corollaries of one another. The scissor lifts can be classified according to energy used as hydraulic, pneumatic or mechanical. Designing a hydraulic scissor lift jeremy schwartz hydraulics are a very powerful tool for applying a ton of force no pun intended where you want, when you want it. The length and width of the scissor lift can be changed. The most common form is a car jack, floor jack or garage jack which lifts vehicles so that maintenance can be performed. Simulative calculation and optimal design of scissor lift. With this in mind, a scissor lift device would have two basic requirements, first to lift 500 pounds and second to achieve a 40 degree angle of lift. Show all images of scissor lift mechanism design related images. In order to reduce the inadequacies of the devices mentioned above, a scissors mechanism is proposed. Designing and calculating the stresses induced in scissors jack. Industrial scissor lifts and tilters have been in use for many years. Pdf scissor lift design for use in the automotive industry. Pdf dynamic analysis of scissor lift mechanism through. Pdf design and fabrication of hydraulic scissor lift.
Kinematic design and fabrication of four bar mechanism to steer a. Our design of the car jack will be implementing an electric motor that will operate the lead screw of the scissor jack. The jack shown at the right is made for a modern vehicle and the notch fits into a hard point on a uni body. Other design concepts generated include the wheel locking mechanism, button type, lean bar design, seat implementation, and power cord containment.
A scissor jack is a mechanical device used to lift a heavy vehicle from the ground for changing the wheel and. Ge 410 fall 2005 jim ramirez david hettinger instructor. The main objective of the use of scissor lift is to. Most scissor jacks are similar in design, consisting of four main members driven by. Scissor jacks are simple in construction and easy to used to run large loads for short. Simulative calculation and optimal design of scissor lift mechanism. A scissor lift having upper and lower platforms and actuated by a cable reeved so as to pull at least one set of the ends of the scissor together at its extended position and also reeved about a cam roller interposed between the arms and working toward the pivot connection during the portion of the motion in which the lift begins to extend.
A jack is a mechanical lifting device used to apply great forces or lift heavy loads. While their safety record has been excellent, there were no definitive standards regarding their design, manufacture and performance. Best innovative ideas for mechanical engineering projects. Design and fabrication of devising simplified motorized scissor jack.
The following paper describes the design and construction of the hydraulic scissor lift. The problems associated with the conventional jacks are the ergonomic snags experienced by operators due to prolonged bending or squatting positions during operation. Design and development of scissor type car lifter the. The paper describes the design as well as analysis of a hydraulic scissor lift having two levels. It is a great light weight jack for the garage or to carry in your automobile. Scissor lift design is used because of its ergonomics as compared to other heavy lifting devices available in the market. Assembly have been created in 3d autodesk inventor 2014 by our team. Jun 03, 2017 scissor car jacks usually use mechanical advantage to allow a human to lift a vehicle by manual force alone. Design and analysis of hydraulic scissor lift by fea. The driving mechanism of the lift must be a hydraulic cylinder. This is a rendering i generated using solidworks motion study and photoview 360, a solidowrks addin. Scissor jack design project free download as word doc. Scissor car jacks usually use mechanical advantage to allow a human to lift a vehicle by manual force alone.
This tech note discusses the principles behind the design of a hydraulically powered scissor lift. Dec 9, 2016 simulative calculation and optimal design of scissor lift mechanism free download as pdf file. Show all images of scissor lift mechanism design related. Scissor jacks are simple mechanisms used to drive large loads for short. Scissor jacks are simple mechanisms used to drive large loads short distances. Dynamic analysis of the hydraulic scissors lift mechanism.
In this tutorial, we will be automating the creation of a scissor lift. Design and analysis of scissor jack full report download. Feb 14, 2016 the power screw design of a common scissor jack reduces the amount of force required by the user to drive the mechanism. Conventional car jacks uses mechanical advantage to allow a human to lift a vehicle by manual force. Apr 20, 2012 the force applied to extend the scissor mechanism may be hydraulic, pneumatic or mechanical via a lead screw or rack and pinion system. Scissor lift design is preferred over other heavy lifting devices available in the market. Mechanics and machine design, equations and calculators.
The compact size and light weight make it easy to position and handle design makes it an effortless lift. Diy scissor lift table project scissor lift mechanism kg, lifting height. Car jacks usually use toggle advantage to allow a human to lift a vehicle by manual force alone. Pdf design and kinematic analysis of the car jack researchgate. Diy mechanisms for inventors, hobbyists, and artists roberts 1674 chapter1 figure 15 the wheelbarrow as a second class. Mechanism description scissors the following information explains the scissors and their individual parts.
We also keen at reducing the weight of scissor jack at the same time maintaining its. April 25th, 2018 single mechanical scissor jack design application pdf free download here a. Calculations of the inner stresses must be done and a 3d model must be created. Abstract car jacks usually use mechanical advantage to allow a human to lift a vehicle by manual force. June 15th, 2019 scissor jacks are simple mechanisms used to drive large.
Mar 19, 2021 show all images of scissor lift mechanism design related images. The efforts required in achieving the desired output can be effectively and economically be decreased by the. Most scissor jacks are similar in design, consisting of four main members driven by a power screw 7 9. Project includes all cad 3d parts, necessary for implementation of complete product.
Design, construction and testing of an electric powered. The jack will need to be safe, portable, and operated by a single user. Scissor lift design calculation mechanical engineering. They are approximately 15 cm long, made of steel and they can be easily held in one hand. Pdf design and analysis of scissor jack firaol asefa. This mechanism mainly consists of a movable frame and a scissor jack. Scissor or toggle jack a toggle or scissor jack is a device which lifts heavy equipment. Now a days with the increasing levels of technology, the efforts being put to produce any kind of work has been continuously decreasing. This paper is a modification of the current toggle jack by. 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 most common form is a car jack, floor jack or garage jack which lifts vehicles or. Lifting mechanisms for dump trucks are too large and expensive for use on a small six foot trailer.
The scissor lift can be used in combination with any of applications such as pneumatic, hydraulic, mechanical, etc. With its builtin extra wide base, it provides you with the additional stability. Pdf a scissor jack is a mechanical device used to easily lift a vehicle off the ground to. Hall 12052005 ii abstract scissor jacks are simple mechanisms used to drive large loads short distances. Figure 1 shows the design of automatic car jacker where. The tradeoff in both cases is that the input, or effort, must move a greater distance than the output, or load. Members 1 through 8 are all primarily cshapes with ideal pin connections. The most common form is a car jack, floor jack or garage jack, which lifts. Development of auto car jack using internal car power. Imagine you work for a company that designs and manufactures scissor lifts, where each scissor lift you design is the same but different. First, conceptual design is carried out to obtain the best suitable concept for the design and best suitable concept comes out to be a scissor mechanism. Prolift t9456 grey scissor jack is the 3000 pound capacity scissor jack. The most common form is a car jack, floor jack or garage jack. Scissor mechanism is claimed to be more versatile as the mechanism can be installed with any types of actuators such as hydraulics, pneumatics and electrical islam et al.
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