Trailer suspension: torsion bar, spring, spring, two-axle

When planning the purchase or replacement of an existing suspension, it is important to consider the purpose for which the trailer will be used; for transporting heavy loads, it is better to equip the car with a two-axle model. Torsion bars are a little cheaper, but they are only suitable for driving on flat roads, this should be remembered.

Seriously approaching the issue of what the suspension of a car trailer should be, it is important to consider all possible options for the execution of nodes, including torsion, spring and spring models. It would not be superfluous to take a closer look at two-axle systems, which have some differences from the usual single-axle structures for transporting goods by car. Expert advice will help to avoid mistakes at the stage of choosing the optimal configuration and will be useful to any ordinary buyer.

Types of trailer suspensions for a car

There are at least 4 types of design, but it is possible to specifically understand the features of the models, as well as the technical characteristics, only when studying the pros and cons of a particular type of car trailer suspension.

Torsion (rubber-harness)

This type of product consists of an inner and outer pipe, the first part of the assembly is made from a triangular or square profile. The second element acts in the form of a hexagonal base, rubber bands are placed between them at the factory, preventing the internal component of the torsion bar suspension from turning.

Torsion (rubber-harness) suspension

Among the positives were:

• Low price of the device.
• Ease of installation.
• Simple service.
• Independence of wheels from each other.

There are also disadvantages, such parts of a light trailer cannot be repaired. If you do not calculate the axle load, the inner element will rotate and the component will have to be replaced with a new one.

Leaf suspension

The design of the device includes a spring and a beam, the unit is not supplemented by hydraulic shock absorbers, which help to level the unevenness of the road surface. Spring sheets are assembled from elements made using a special technology, hardened and fastened together with reliable clamps. Pros:

• System maintainability.
• Good margin of safety.
• Long service life.

Leaf suspension

Weaknesses should also be taken into account, without periodic maintenance and lubrication of moving parts, breakdowns often occur, parts are quite whimsical to maintain. There can be no talk of the independence of the wheels in this design, therefore, when hitting a pit, the trailer often catches a roll.

Spring suspension

To replace the springs in such a suspension model, cylindrical springs come, hydraulic shock absorbers are mounted in them, transverse and trailing arms are connected. Thanks to such additions, the design becomes independent, when one wheel hits an obstacle or pothole, the second side rides invariably smoothly. Among the advantages it is worth highlighting:

• Ease of repair.
• If necessary, you can implement an adjustment of the height of the springs.
• When hit in a hole, there is no recoil in the car body and tow bar.

Spring suspension

Among the minuses was the high price of the finished product, and when faced with the replacement of the main parts, which are quite a lot in the device, the process will cost a tidy sum.

Biaxial suspension

Such designs will be a competent solution, if necessary, to transport loads over 500 kg. Often, such models are equipped with a spring or rubber-harness suspension. The additional axle not only increases the possible load on the trailer, but also allows you to create the right balance between the rear of the car, which has a positive effect on safety when driving on the highway at high speeds.

See also: Steering rack damper - purpose and installation rules

Double axle trailer

On sale you can find universal trailers, which, when created, were customized for consumer needs such as organizing construction, animal husbandry or transporting tanks, as well as heavy plastic windows.

What hanger to put

When planning to purchase or replace an existing suspension, it is important to consider the purpose for which the trailer will be used; for the transport of heavy loads, it is better to equip the car with a two-axle model. Torsion bars are a little cheaper, but they are only suitable for driving on flat roads, this should be remembered. Otherwise, the roll of the rear addition of the vehicle when it enters the pit cannot be avoided, which is fraught with the loss of some part of the loose contents.

Spring units perform well on poor coverage, such devices are very reliable and durable, if necessary, it will be possible to replace a failed or burst component on the road, or to get to the nearest repair shop without any problems. Spring models will be expensive, they will also require impressive sums to maintain or purchase new parts, but the trailer behaves very predictably at an obstacle, leveling out all the potholes or depressions that dot most of the country's roads.

Types of suspensions for trailers