How many kinds of semi trailer suspension? What's good about air suspension?
Suspension, also known as suspension, is a general term for all force transmission connection devices between the frame and the axle of the semi-trailer, used to transmit the force and force torsion between the wheel and the frame, buffer the impact force transmitted by the road to the frame or body, and reduce the resulting vibration to ensure that the car can run smoothly.
Under normal circumstances, the suspension of the semi-trailer can be mainly divided into four types:
1, rigid suspension.
The chassis of the rigid suspension directly acts on the axles between the wheels, without a spring as a buffer, and completely relies on the swing of the balance beam to maintain the relative balance of the front and rear axles when the road is uneven.
This kind of suspension is relatively rare at present, because its shock absorption effect is very poor, mainly used in low-speed cargo carrying low-plate semi-trailer.
2. Steel plate suspension.
Also known as tandem steel leaf spring balance suspension, that is, a common leaf spring suspension, mainly composed of leaf springs, suspension supports, connecting rods, U-bolts and so on.
The biggest advantage of this trailer suspension is low cost, reliable work and easy maintenance. Because of this, the steel plate suspension is currently the largest proportion of semi-trailer applications in the country, about 70-80%.
3. Single point suspension.
That is, the common leaf spring before and after the bracket is reduced into a single bracket connected to the body, which can be divided into different axles, so the bearing capacity is larger, and is generally used in heavy trailers.
4. Air suspension.
Also known as the air bag suspension, its most significant feature is the air bag type air spring, compared with other suspension, the buffer force of the air suspension is better, can effectively protect the cargo, improve driving comfort, is currently mainly used in the transportation of precision instruments, dangerous chemicals and the like.
Advantages of air suspension:
1. Good shock absorption effect. Compared with the traditional leaf spring, the air bag is obviously softer and more comfortable, it forms a soft connection between the frame and the axle, and the bumps and shocks from the road can be alleviated to a great extent, in addition to enhancing the driving comfort, and it is also a protection for the cargo.
2, reduce the load stress. The compressibility of the air makes the airbag suspension easily cope with road bumps at the same time, which can reduce the load stress, extend the service life of the axle and semi-trailer, and reduce the cost of using the vehicle to a certain extent.
