What are the normative requirements for flatbed semi trailer products?

A semi trailer is a trailer whose axle is placed behind the center of gravity of the vehicle and is equipped with a coupling device that can transmit horizontal and vertical forces to the tractor. drive.

Compared with full trailers, semi trailers are mainly used for long distance cargo transportation, and can be further subdivided in type. Different types of semi trailers are suitable for transporting different goods. For example, self unloading semi trailers are suitable for the transportation of bulk and scattered goods such as coal, ore, and construction materials,flatbed semi trailer low bed semi trailers are suitable for the transportation of vehicles, machines and other heavy duty goods, and warehouse type semi trailers are mainly used for agricultural and sideline products and For the transportation of other light foam goods, tank semi trailers are mainly used to transport liquids, bulk materials and bulk cement, etc., flatbed semi trailer and van semi trailers can be used for the transportation of household appliances, light textile goods, building materials and charted goods.

What are the parts of a semi trailer? Generally speaking, semi trailers can be mainly divided into frame, bodywork, traction pin, suspension system, running mechanism, electrical system, support device, protective device and trailer accessories from the structure.

1. The frame, the main structure for loading goods, consists of beams, welded I-beams, support beams, connecting beams, side beams, lock heads, traction pin connection devices, panels, etc.

2. Top loading, refers to the railing board, gantry, etc., auxiliary frame to load goods.

3. Traction pin, which is an important component that connects the semi trailer to the tractor and bears the traction force to drive the trailer forward.

4.Suspension system, a device used to connect the frame and the axle, flatbed semi trailer is mainly used to support the load and reduce the impact of the dynamic load of the vehicle. Generally, it can be divided into four types: steel suspension, single-point suspension, air suspension, and rigid suspension. , There are differences in performance, flatbed semi trailer which need to be selected according to the purpose of the vehicle.

(1) The height of the loading surface of the cargo platform from the ground should not exceed 1150 mm. In the "Others" column, the height of the loading surface of the cargo platform from the ground (mm) and "Only non-dismantling objects can be transported" should be indicated.

(2) The maximum tire size should not exceed 8.25-20 (8.25R20), and the bearing capacity should also meet the requirements of the relevant tire specifications.

(3) The total length does not exceed 16.0m, and the connection with the tractor is a "big gooseneck" structure.

(4) It is not allowed to set up plugging structures on both sides of the cargo platform.

(5) For low flatbed semi trailers with a length of more than 13m, the spool structure should be adopted, specifically the structure of one line with two axles, two lines with four axles or three lines with six axles.

The specific technical requirements of the spool structure are:

(1). Twin structure should be adopted;

(2). The axle and the frame should be rigidly connected without suspension structure;

(3) The top of the tire should be exposed,flatbed semi trailer or a maintenance hole that can expose the top of the tire should be provided above the tire between the two beams of the frame, and a photo of the maintenance work status should be provided in the "Announcement" supporting materials;

(4). The maximum allowable axle load of the semi trailer with spool structure is 18000kg (one line and two axles) and 24000kg (two lines and four axles and three lines and six axles), and the maximum total mass is 35000 kg (one line and two axles) and 40000kg (two lines and four axles). axis and three-line six-axis).