Hight adjustable chassis for regulating orientation of chassis part in relation to reference orientation

Abstract

A chassis is described which is constructed of two lower side frames which at each end are provided with a wheel or caterpillar track. On each of the two lower side members, there is a horizontal bearing. Each of these bearings are connected to an upper vertical side member which at their upper end is connected to two parallel cross members through horizontal bearings for the development of a parallelogram connection. Between the lower and upper side members, there are two double-acting hydraulic cylinders. These can be connected in parallel in order to make a weight distribution possible. By means of a regulation valve between pressure side and suction side, respectively, on the double-acting hydraulic cylinders the upper part of the chassis can swing back and forth in the longitudinal direction of the side members. Between the two cross members there is a double-acting hydraulic cylinder which can swing the upper part of the chassis back and forth in the side member's transverse direction by means of a regulation valve. Thus, it is possible to adjust a chassis member to a preferred orientation irrespective of the slope of the surface.

Description

technical field [0001] The invention relates to a chassis having four or more support wheels and means for height adjustment of these support wheels in order to be able to adjust the orientation of chassis components with respect to a reference direction, preferably vertical. Such a chassis would preferably be used in portal tractors, but could also be used in other off-road vehicles, where it would be preferable to keep the chassis in a given orientation regardless of unevenness or slope of the ground, and would also desirably be a four-point weight distributed. Background technique [0002] Known mast tractors are formed as three-wheeled vehicles with fixed parts so that they tilt with the inclination of the ground. They will be used in row crops that grow in tree and shrub shapes. These crops will grow vertically regardless of the slope of the ground. When known gantry tractors are used on sloped ground, they will hit vertically growing trees. The three-wheel structur...

AI Technical Summary

Problems solved by technology

The three-wheel structure makes it difficult to drive on sloped ground because the center of gravity must remain within the triangle formed by the three wheels; also, it does not work optimally between a tractor driven on sloped ground and vertically growing trees or other crops state

The suspension system is suitable for use as a damping system, however, it allows only limited adjustment of the upper part relative to the base assembly, this limited movement does not allow sufficient height adjustment of the support wheels and thus the body mounted on the upper part of the structure

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