Design and Development of Automatic Scissor Type Car Jack

Abstract

Having an emergency, especially on the roadside, is not a pleasant experience for every driver. The most common problem that could happen to a car while driving is a tire puncture. When there is no car workshop nearby, the only way that a driver can do is to replace the punctured tyre with a spare tyre which is usually placed under the car's trunk. To replace a tyre, the car needs to be elevated until the tyre is not touching the ground. Hence, a car jack is the most important tool needed for this job. The main objective of this project is to design and develop an automatic scissor-type car jack that can operate automatically without requiring any strength from its user. A 12V DC Motor is used to rotate the power screw of the scissor jack. An automated system that uses sensors is developed so that the user no longer has to bend their body to find the jacking point under the car. The automated system also enables the scissor jack to automatically stop lifting the car when a certain height is reached. The design is constructed using Catia V5, and stress analysis has been done to determine the factor of the critical parts. Motor selection analysis is done to find the best motor suitable for this project. Fabrication of the prototype involves mechanical work such as welding, grinding, and soldering. The electric and electronic circuit is configured to enable the scissor jack's automation. The results of the testing have proven that the mechanism is able to operate as programmed.