SU373246A1 - TELESCOPIC BOOM CRANE - Google Patents

Description

one

The invention relates to hardware and equipment, in particular to crane structures with sliding booms.

Telescopic boom cranes are known, containing box-shaped sections, which are moved apart with the help of guide wheels, whose axes are rationalized at an angle equal, for example, to 45 ° to the lateral walls.

However, in the case of known telescopic booms, contact points with guide rollers are subjected to bending loads in the process of moving the sections apart, so that such arrows require strengthening in the contact zone, which can be achieved by thickening the sections or making them from a more durable material.

The purpose of this invention is to provide self-alignment of guide rollers and. optimizing the distribution of loads on the elements of sections in the zone of their contact with the guide rollers. To do this, a cylindrical shank is installed at the end of the sliding section coaxially with its longitudinal axis, on which the roller bearings are pivotally fixed.

FIG. 1 shows schematically a general view of the proposed telescolic boom; in fig. 2 shows a section along the line LA in FIG. one.

The exit section / (directed by the rollers 2 fixed on the outer section 3 and rollers pivotally mounted on the supports 5. The latter are fastened securely on the cylindrical needles | Stovik 6 mounted on the sliding section 1 coaxially with its longitudinal axis.

When the section I extends, due to the hinge fixing of oior 5, the rollers 4 self-aligning relative to the whole section 3, this in turn eliminates the possibility of bending loads IB of the elements of the latter.

Subject invention

A telescopic crane boom containing box sections, moved apart by means of guide rollers, the axes of which are arranged in an angle of, for example, 45 ° to the side walls, in order to set the guide rollers and to optimize the distribution of loads on section elements in The zone of their contact with the rollers, on the end of the movable section coaxially with its longitudinal axis, has a cylindrical shank, on which the roller supports are hinged.

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Fig. /