Car jack is a device used to lift up the cars while changing the tires during an emergency. Car jacks are available at the market has some disadvantages such as requiring more energy to operate, are not suitable for women and cannot be used on the uneven surface. The purpose of this project is to modify the design of the existing car jack in terms of its functionality and also human factors considerations. In this project, the scopes of research were on the designing 1.5 – 3 ton maximum lifting capacity of car jack by using optimization concept.
To optimize the existing design, the hand lifter has been replaced by the use of pedal lever as it can reduce energy usage. In the process of obtaining a suitable design, the customer needs will be translate to the engineering characteristic to obtain the concepts that need to be modified and fabricated. From the house of quality, the best concept will be valued based on the weighted rating method. The morphology chart had been used to obtain the best concept solution. After the best concept had been selected using the weighted rating method, next step was to determine the part and component that can be modified by arrange the part into chunks and clustering with the component according to the function or system. From this step, it can be determined which component can be reduced or modified.
Then the configuration design was analyzed According the function factor and critical issue so that the design that had been implementing was according to the specification and customer requirement. The last step for this project was parametric design. In this topic, the new design concept will be calculated to obtain the required force and compared with the theoretical calculation in the table of human factor.
A jack is a mechanical device which uses a screw thread or a hydraulic cylinder to lift heavy loads or apply great linear forces. The most common forms of jacks available in the market are Scissor car jacks,
House jacks, Hydraulic jacks, Pneumatic jacksand Strand jacks that are extensively used in Construction, Industrial, Automobile and
Engineering segments. In most of the powerful jacks, hydraulic power is Used to provide more lift over greater distances. Mechanical jacks usually have lifting capacity ranging from 1.5 tons to 3 tons.
Hydraulic jacks are mechanical devices used to lift heavy loads, vehicles, weight equipment or apply great forces using hydraulic fluid as the main source of power. These are widely used in automotive, industrial and construction industries. These are sturdy in construction, compact in size, portable and capable of exerting great forces. It consists of two cylinders of different sizes which are connected together by a pipe and a hydraulic fluid or oil.
The hydraulic fluid is incompressible and using a pump plunger is forced into the cylinder of the jack. Oil is used because of its stable and self lubricating nature. When the plunger pulls back, oil is drawn out of the reservoir and it goes inside the pump chamber. When the plunger moves forward, the oil is pushed back into the cylinder. This oil movement builds up pressure in the cylinder. And it is this pressure which leads to the working of the hydraulic jack. It also finds usage in
workshops and also lifts elevators in low and medium rise buildings.
Bottles are portable in design; in these the piston is in a vertical position and it supports a bearing pad which touches the object being lifted. Bottle Hydraulic are most appropriate for lifting vehicles (cars, trucks, SUVs, trailers), houses and other heavy objects.
In a Floor Jacks, the piston is in a horizontal piston and there is a long arm which provides the vertical motion to a lifting pad. There are wheels and castors in floor jacks.
Theworking principleof all hydraulic jacks is Common but these differ in their shapes and sizes. Hydraulic jacks with varied sizes and specifications are used to lift different types of heavy equipment and vehicles such as bulldozers, forklifts, elevators, trolleys and trailers and excavators. These can also be found in household equipments as well like door stoppers, cars, bikes etc. Hydraulic Jacks are high in demand across the globe owing to their sturdy construction, reliable and hassle free operation, unparalleled performance, user-friendly design and less maintenance.
