Four Types of Trailer Suspension Mar,17 2022
Suspension is an important part of semi-trailer connecting the chassis walking device and frame.The supporting,braking and driving force of semi-trailer are all passed by the suspension system.It can also reduce the impact of bad roads on vehicles - shock absorption and ensure the stability of the semi-trailer. Now we will introduce four type of trailer suspension that be used mostly:Spring suspension,Airbag suspension,Bogie suspension,rigid suspension.

Spring suspension,also be called leaf spring.It is made of leaf spring,shackle,U bolt etc.
Advantage:cheap,reliable and easily maintain.
Now over 80% semi-trailers in Asia and Africa use the spring suspension.
Common trailer type that use spring suspension:skeleton trailer,flatbed trailer,fuel tanker trailer,bulk cement trailer,low bed trailer,tipper trailer etc.

The most obvious feature of airbag suspension is the Air bag air spring.
Advantage:Light weight,good stability
But the price of airbag suspension is high.Now most of the trailer with airbag suspension is be used to transport precision instrument,tobacco and dangerous chemical cargo.
Common trailer type that use airbag suspension:flatbed trailer,aluminum tanker trailer,acid tanker trailer etc.

The Bogie suspension is a tandem suspension meeting the needs in heavy transportation services
Advantage:Big payload,low maintenance cost
The road wheels with this suspension type are independent and their unsprung mass is lower compared to other suspension systems.
Common trailer type that use bogie suspension:logging trailer,tipper trailer etc.

A rigid axle suspension is simply the just opposite of an independent suspension.These types of suspensions are dependent to adjacent wheel of a vehicle.In a rigid or solid suspension a beam or shaft is commonly connected wheels on both sides.Hence when one wheel is hit on a bump or pothole the other wheel is also affected.
Advantage:High payload
The ride height remains constant whether the semi-trailer is loading or unloading.It is better used for low speed,because the poor damping.

Common trailer type that use rigid suspension: low bed trailer

Trailer Suspension

Four Type Of Trailer Suspension

42000 liters Fuel Tanker Trailer With Airbag Suspension

42000 liters Fuel Tanker Trailer With Airbag Suspension

Drop Side Trailer With Spring Suspension

Drop Side Trailer With Spring Suspension

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