Semitrailer suspension device

Abstract

The invention relates to the field of semitrailers, and particularly relates to a semitrailer suspension device. The semitrailer suspension device comprises a longitudinal beam and a front suspensionsupport mechanism, wherein the front suspension support mechanism is connected with the lower surface of the longitudinal beam; the front suspension support mechanism comprises an outer gear ring, a threaded rod, a first air spring, a front suspension support, an inner threaded sleeve, a toothed plate, a hydraulic cylinder and a mounting plate; a front suspension support is arranged below the longitudinal beam, the upper surface of the front suspension support is connected with the threaded rod through the first air spring, and the threaded rod extends into an inner threaded sleeve with an opening in the lower end and is in threaded connection with the inner threaded sleeve; the upper end of the inner threaded sleeve is rotationally connected with the longitudinal beam, the outer surface of the inner threaded sleeve is fixedly connected with the outer gear ring which rotates coaxially, the lower surface of the inner threaded sleeve is fixedly connected with the horizontally-arranged hydraulic cylinder through the mounting plate, and the output end of the hydraulic cylinder is fixedly connected with the toothed plate. The semitrailer suspension device provided by the invention has the advantages that the height of the semitrailer body can be adjusted, and the buffering effect is good.

Description

technical field [0001] The invention relates to the field of semi-trailers, in particular to a semi-trailer suspension device. Background technique [0002] A semi-trailer is a trailer whose axle is placed behind the vehicle's center of gravity (when the vehicle is evenly loaded) and is equipped with a hitch that transmits horizontal and vertical forces to the tractor. [0003] Semi-trailers are generally three-axle semi-trailers, and their types are divided into 11-meter warehouse semi-trailers, 13-meter warehouse semi-trailers, and low-bed semi-trailers. It is a heavy-duty transport vehicle connected to the semi-trailer head through the traction pin. The semi-trailer suspension device is an important component of the semi-trailer. When the long-length semi-trailer suspension device is in use, the length of the front suspension bracket and the rear suspension bracket cannot be adjusted, so that the height of the vehicle body cannot be adjusted, making the semi-trailer easy...

AI Technical Summary

Problems solved by technology

The semi-trailer suspension device is an important component of the semi-trailer. When the long-length semi-trailer suspension device is in use, the length of the front suspension bracket and the rear suspension bracket cannot be adjusted, so that the height of the vehicle body cannot be adjusted, making the semi-trailer easy to be affected by the road surface. The restriction of the height limit is not conducive to the use of semi-trailers

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