1. INTRODUCTION
The land transport sector encompasses the commercial use of many different vehicles including lorries, light vans, taxis, buses, cars construction and agricultural machinery, emergency service vehicles, motorcycles, mopeds and bicycles. Among them tipper trucks found various applications in road transport sector, that it can carry heavy loads from one place to another efficiently.
The dumper in the tipper truck is actuated hydraulically in conventional trucks. It consists of Prime movers, pumps, directional control valves, accumulators for its operation to lift heavy loads. Due to these various components the efficiency of the automobile will reduced to a particular extent.
Here we provide a simple and economical solution for the above mentioned problem, that the trailer portion of the truck is lifted pneumatically without the aid of any external source. The hydraulic system will have to lift the load along with the self weight of the trailer. This increase in load is compensated by adding a pneumatic spring in the conventional system.
Pneumatic spring is a type of spring that operates using pressurized gas such as air or nitrogen. Automobile shock absorbers sometimes contain pneumatic springs.
We used two pneumatic springs of same kind for our project. It is joined with the base of the trailer on both sides and it gets compressed due to the self weight of the trailer. During lifting only less force is required than in the conventional hydraulic system due to the application of compressed air inside the pneumatic spring. This is the basic principle of our project, further fabrication processes are explained later in this report.
Source : www.cshardware.com
The main objectives of our project are,
• To reduce the work done by hydraulic sytem in the weight lifting mechanism of tipper trucks, thereby increasing the efficiency of the vehicle.
• To utilise the application of compressed air in weight lifting applications to make it more simple and economical.
• To eliminate the limitations of hydraulic system by assisting it with a pneumatic spring in tipper trucks and to make the weight lifting operation more effective.