Design and Fabrication of Integrated Mechanical Jacks for Four Wheelers

Mechanical Engineering

With the increasing levels of technology, the efforts being put to produce any kind of work has been continuously decreasing. The efforts required in achieving the desired output can be effectively and economically be decreased by the implementation of better designs. Power screws are used to convert rotary motion into translatory motion. A mechanical jack is an example of a power screw in which a small force applied in a horizontal plane is used to raise or lower a large load. The advantage of a mechanical jack is the ratio of the load applied to the effort applied. The height of the jack is adjusted by turning a lead screw and this adjustment can be done either manually or by integrating an electric motor. This research paper analyzes the modification of the existing mechanical jack by incorporating an electric motor in the screw and attaching whole assembly to the car body (chassis) in order to make car lifting easier. In this modified design, mechanical jack and motor are attached to the four corners of chassis of car. Power screw of jack is rotated by connecting motor through coupling, plugged to the automobile 12 V battery source to generate power for the motor, which transmits its rotating speed to the power screw to be rotated with required speed reduction and increased torque to drive the power screw. With the assembly the side of punctured wheel can be easily lifted and removal of that wheel will be more easy and safe. The significance and purpose of this work is to modify the existing car jack in order to make the operation easier, safer and more reliable. The modified car jack is easy to use by women, old age persons or whoever had problem with the vehicle tyres along the road. The designed motorised jack will also save time and requires less human energy to operate.

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