ABSTRACT
Automobiles are now becoming the most essential part of our day-to-day life. This is the golden age for automobile companies, since they are attaining their peak selling rates in this 21st century. However with the increased production they are facing lots of problems like traffic, fuel efficiency, blends, exhaust gas analysis, etc., Among them providing a proper reverse system in an automobile is a major issue for them. With increased parking difficulties and heavy traffic problems, equipping the reverse system with more facilities is their major objective. In addition to that gliding of vehicles in gradients and mountain roads occurs often due to driver's aprosemia.
In this project, we made a simple and economical solution to the above mentioned problem. We used Ratchet and Pawl mechanism as our major capital and fabricated an equipment which can be attached to any automobile that it prevents unwanted reverse motion when it is at rest or in motion. The attachment is to be welded with the wheel rim and the pawl with a retraction spring or a lever mechanism is fabricated with the frame. Due to cost factors a small prototype of this project was done. Here we did a model with two metal wheels connected with a shaft. A rectangular frame is welded with the shaft and a lever attachment is provided in it to engage and disengage the pawl. The ratchet is welded with one of the wheels.
Key words: Ratchet and pawl mechanism, Aprosemia, Levermechaism