Spring Assembly

An automobile suspension system is an assembly of mechanical devices designed to reduce shocks to a vehicle from rough or uneven terrain and provides a comfortably smooth ride for passengers and to reduce wear and tear on the automobile itself. Leaf and parabolic spring assemblies are the most widely used amongst the other devices used in suspension systems. Also called as laminated, semi-elliptical, carriage springs, cart spring, or helper springs, leaf springs were first used on carriages at least since the time of the Roman Empire. They are long, narrow, thin strips of flexible material, such as metal. As force is applied to them they flex, distorting into a bow-shape. Energy is used up in bending the spring and the distance the spring bends is directly proportional to the strength used to bend it. A leaf spring assembly is a bundle of leaf springs, each slightly smaller than the previous, tied or hooked into a bundle. Now all this and more in best of its kind form are available with Jonas Woodhead, one of the best leaf and parabolic spring manufacturers in India. They also manufacture custom made leaf and parabolic springs as per specified design needs.

The spring advantage

Leaf-spring suspensions are very beneficial on tacky and rough surfaces. The leaf supported vehicles seem to be a lot more consistent under those conditions. It performs several functions that other suspension systems might need additional hardware to serve. It

Supports the chassis weight

Controls chassis roll more efficiently

Controls rear end wrap-up

Controls axle damping

Controls lateral forces

Controls braking forces

Regulates wheelbase lengths (rear steers) under acceleration and braking.

The multileaf spring is rated higher than the monoleaf and is the most common leaf spring used for stock car racing. The reason the leaf-spring design is so good for higher g-force conditions is the design has a very wide spring base. The wider apart the springs are mounted, the fewer roll tendencies there are. Also, the moment centre height can be fairly high with a leaf-spring design. This shortens the moment arm in the rear, producing less roll. There is much less rear steer when going over heavy bumps or holes in the track, so the rough conditions that upset a bar car is welcomed by the leaf-spring car. The overall cost of a race car is less when using leaf springs mostly because you don't need many of the mounts, linkages, and other hardware that must be used with three- or four-link rear suspensions. Also, a leaf spring can be used in conjunction with a coil or coil over spring to enhance the spring rate adjustability function for chassis setup balance.

Products

In order to cater to Heavy and Light Commercial vehicles, Trailers, Cars, Stationary Vehicles, Mining Trucks, Multi Utility Vehicles & Oil Tankers and more, Jonas, leading leaf spring dealers and distributors in India with over four decades of experience in manufacturing suspensions has forayed into products ranging from leaf and parabolic springs to Air suspensions, U-Bolts, Bushes and Centre Bolts as well.  The primary raw material in our manufacturing process being silico manganese spring steel of various grades (EN 45, EN 45A, EN 47, 60 Si7, 65 Si 7, Sup 9, Sup 9A, Sup 11, Sup 11A, 50 CrV4, 58 CrV4). The materials undergo rigorous inspection and testing including chemical and metallurgical analysis at Jonas labs to ensure that it meets with stringent quality standards. They cater thousands of spring designs and yet, are more than happy to deliver custom made designs as well.

For more information please visit http://www.woodheadsprings.com/

Different Types of Leaf Springs

Leaf spring is a simple form of spring used for suspension in wheeled vehicles. They are also referred to as laminated, semi-elleptical spring, carriage springs, cart spring, or helper spring.In mid 1970's leaf springs were very common in automobiles. At present, most of the automobiles are designed using oil springs, gas springs, or air suspension. They are now used in heavy vehicles such as trucks and cars. The reason that leaf springs are still used in heavy vehicles is that they have the advantage of spreading the load uniformly over the vehicle chassis, whereas coil springs transfer it to only a single point.

Leaf springs are very simple and are not fancy like the other springs that are currently available. They have slightly curved, long and narrow plates fixed to the frame of a trailer that are placed above or below the trailer's axle. They look similar to that of a bow in archery without the string.

There are two types of leaf springs,monoleaf springs and multileaf springs. The monoleaf spring or single-leaf springs consist of only one plate of spring steel. These are normally thick in the middle and taper to the end, and they don't typically offer too much strength and suspension for heavy vehicles. On the other hand multileaf springs consists of several leaf springs with varying length placed on top of each other. The shorter plates are placed at the bottom and the longer plates are placed at the top. They have the same curved shape which have thinner edges and are thicker in the middle.

There are two different leaf spring based on the springs ends, double-eye leaf springs and open-eye leaf springs. On double-eye leaf springs the top plate is the longest and has both ends curved like a circle. The ends of the double-eye leaf springs make two holes, which can be connected to the bottom of a trailer's frame. Open-eye leaf springs have only one hole. The other end of an open eye leaf spring usually has a hook end or a flat end.

Whatever may be the type of leaf spring, buying it from the right dealer is most important. For more information please visit www.woodheadsprings.com.