PLASTIC SUSPENSION SYSTEM

This suspension is similar to the compression type rubber spring but here plastic is used instead of rubber. It consists of a metallic cylindrical container which is fixed with the chassis. Inside the container there are two centering rings, one is located at the lower end of the cylinder and the other at the top position inside the cylinder. A suspension shaft is provided, which is fixed to the axle of the vehicle and is free to slide the plastic rings. The shaft has side supports at the upper and the bottom centering ring.

Plastic rings are provided above and below the upper centering ring. These plastic rings absorb the vertical dynamic loads. The plastic rings are supported on a disc in the shaft and when the suspension is in rebound position, the disc seats on the bottom centering ring. The centering rings are located in the container with help of the circular pressed steel plates and sleeve assemblies. When the vibrations in the axle is transmitted to the spring shaft due to the road irregularities, then the plastic rings will be compressed or and elongated and the sleeve assembly, carrying the centering ring and surrounding the plastic rings will move up or down in the cylinder. A flexible gaiter is provided at the bottom to prevent the system from dust or other foreign particles. The main advantage of this system are light weight, silent operation, simple construction, less maintenance, low wear cost, better cornering characteristics and less chances of sudden collapse.