A retractable frame of a low-bed semi-trailer

Abstract

The invention relates to the technical field of semitrailers, in particular to a retractable frame for a low flat-bed semitrailer. The retractable frame structurally comprises a fixed frame assembly, a movable frame assembly, a rolling wheel device and a locking device which is used for fixing the movable frame assembly in the horizontal direction; the rolling wheel device is arranged on the fixed frame assembly and / or the movable frame assembly, and is used for supporting the fixed frame assembly, and enabling the movable frame assembly to move in a retractable manner in the horizontal direction relative to the fixed frame assembly. Compared with the prior art, the retractable frame provided by the invention has the advantages that retractable length adjustment of the whole frame is realized; when a larger carrying capacity is required to be met, the whole frame can be lengthened; during routine use, the whole frame can be shortened to avoid various inconvenience caused by the relatively long frame body during use, so that different carrying capacity requirements can be met; the operation is simple, the use is convenient, and the production cost of the frame is reduced.

Description

technical field [0001] The invention relates to the technical field of semi-trailers, in particular to a retractable vehicle frame of a low-bed semi-trailer. Background technique [0002] Low-bed semi-trailers are usually used to transport heavy-duty vehicles, rail vehicles, mining machinery, forestry machinery, construction machinery and other heavy-duty goods. They have a low center of gravity, good stability and safety, and the ability to transport super-high goods and pass overhead obstacles. Strong, more and more widely used. Due to the different sizes and volumes of the heavy-duty goods that need to be transported, when using low-bed semi-trailers to transport some large-scale heavy-duty goods, it is often necessary to use widened or extended low-bed semi-trailers, but the current widened or The extended low-bed semi-trailer simply extends, widens or lengthens the frame, and the entire frame adopts a rigid fixed structure. The total length of the vehicle in this fixed...

AI Technical Summary

Problems solved by technology

Due to the different sizes and volumes of the heavy-duty goods that need to be transported, when using low-bed semi-trailers to transport some large-scale heavy-duty goods, it is often necessary to use widened or extended low-bed semi-trailers, but the current widened or The extended low-bed semi-trailer simply extends, widens or lengthens the frame, and the entire frame adopts a rigid fixed structure. The total length of the vehicle in this fixed frame structure is fixed, and the maximum loading capacity is limited by the vehicle. Therefore, it cannot meet the transportation needs of different loads, and cannot effectively take advantage of the transportation advantages of low-bed semi-trailers.

However, if the length of the vehicle is set too long in order to meet the demand for a large loading capacity, not only will the manufacturing cost be high, the use will be inconvenient, and it will not be possible to ensure that the vehicle size meets the standard requirements during regular use.

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