What are the parts of a sidewall semi trailer?

1. Sidewall semi trailer frame:

The frame is a space frame type low alloy steel welded structure. The frame is welded by two T-shaped longitudinal beams and beams to support the load. There are a traction pin and a traction pin plate connected to the tractor under the front of the frame. The front cross beam of the frame is provided with an air brake connector and a wire connection socket. The front and side of the frame are equipped with lighting or signaling devices.

2. High side wall:

The side wall is divided into a flat plate and a vertical corrugated board. The vertical corrugated board is a typical board, and the strength will be higher. Can be detached or welded to death.

3. Protection device:

Trailer protection device consists of side protection and rear protection to protect pedestrians and other vehicles from getting under the sidewall semi-trailer. It can also reduce wind resistance and save fuel.

4. Traction king pin:

The traction pin is an important component that connects the high side trailer to the tractor and withstands traction, and is connected to the traction seat. It is generally forged from chrome-alloyed steel.

For different cargo tonnage, there are 50 # traction pin and 90 # traction pin. Generally, the limit is 50T trailer and the total weight of the cargo. Below 50T use 50 # pin, above 50T is 90 #, if above 90T, you will use 90 # traction pin.

5. Support leg:

In order to make the semi-trailer reliably parked after leaving the truck head, the front end of the frame is equipped with two support legs that are linked left and right or left and right. It consists of a screw rod transmission mechanism, a bevel gear transmission mechanism, a two-speed reduction box, a transmission rod, an operating handle, and the like. When the handle is pushed in, you can get high speed lifting, and when the handle is pulled out, you can get low speed. When the base is in contact with the ground, it can only be lifted in low gear.

6. Axles and wheels:

Three axle assemblies of the same structure are installed under the suspension system. The axle is a square tube axle. The axle body is provided with a platform for mounting a leaf spring suspension and a bracket for installing a brake air chamber. The axle head is used to install wheels, hubs and brakes.

7. Suspension system:

Suspension device support is welded on the back and lower part of the longitudinal beam, and support device support is provided on the lower front part. The suspension system is a three-axis leaf spring suspension suspension, which is used to support the load and has the function of absorbing driving vibration and so on. The leaf spring suspension system is fastened to the axle body with U-bolts.

8. Brake and operating device:

The drop side semi trailer uses a dual-line pneumatic braking system and is equipped with an anti-lock braking system (ABS).

9. Electrical system:

The drop side semi trailer is equipped with an international electrical system that is compatible with the tractor. There are electrical connector sockets on the front beam of the frame. The rear of the frame is equipped with brake lights, turn signals, parking lights, reversing lights, license plate lights, fog lights and triangular reflectors, and front and side lights with front position and width lights, side marker lights, front right Equipped with ABS indicator. The voltage of various lamps is DC 24V.

10. Trailer attachment:

Other accessories on the semi-trailer include tool box, spare tire frame, stakes and so on. There are also some small accessories, such as tight-fitting ropes and rope hooks, which have highly functional accessories, which must be selected according to their type of semi-trailers.