Design and fabrication of a remote controlled scissor car jack

Abstract

This project involved designing a remote-control system for a scissor car jack. A Scissor Jack is a mechanical device used to easily lift a vehicle off the ground, to gain access to sections underneath vehicles for maintenance or to change the wheel. The most important fact of a jack is that it gives the user a mechanical advantage by changing the rotational force on power screw into linear motion, allowing user to lift a heavy car to the required height. It is called a scissor jack as the structure consists of diagonal metal components that expand and contract in the same way as a pair of scissors. The system consists of the scissor jack mechanism, an automated motor with a gear mechanism and also constructing a unit that can be used to jack up any regular car as controlled by the transmitter to the receiver. The receiver circuit is controlled by microcontroller. The motor with gearing system lifts mechanism. The prototype includes a 12 V battery to power the motor. It also involved the designing and fabricating a radio transmission transmitter circuit capable of transmitting a coded frequency. The receiver circuit is able to receive the transmitted radio signals and be able to process and decode the control signals for the upward movement of the jack. The control mechanism consisting of the dc motor and the link mechanism was arranged such that it allows for smooth control and well fabricated and attached to the scissor car jack.