SU420547A1 - Leveling device for self-guided gantry cranes - Google Patents

Description

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FIELD OF THE INVENTION The invention relates to iodjemno-transiort machines.

Known are ka.natno-lever leveling devices for self-erecting gantry cranes, made in the form of two rope rods attached to the opposite legs of the crane and the envelope rollers located at the ends of the arms hinged to the krap bridge.

However, these devices are complex in design, inconvenient in operation and do not provide for the rotation of the legs at the same angle.

The purpose of the invention is to simplify the design of the leveling device and to ensure the same angle of rotation of the legs of the crane during its self-elevation.

This is achieved by the fact that on the top of the legs a bar is mounted, bearing drums mounted on the axis of rotation of the legs, which are covered by an endless flexible connection in the form of a figure eight.

FIG. 1 shows a crane with leveling device, general view; in fig. 2 - leveling device, in section; in fig. 3 is a section along A-A in FIG. 2

The leveling device 1 is a unit that connects the bridge 2 and the legs 3 of the crane, which at the bottom are connected by a pulley polyspast 4 and are supported on the undercarriage 5.

The device 1 has a railing beam 6. Two shoes with cylindrical drum 7 connected to the beam 6 are hinges 8, which are the centers of rotation of the legs

and the center of the drums. On cylindrical drums 7, an endlessly flexible bond 9 is laid in the form of a figure eight and fixed to HiiM by fasteners 10. The device operates as follows.

When yogin 3 cranes are strung, the legs turn relative to the sharves of 8 cylinders of cylindrical drums 7 in pacnopnoii beam 6.

Novorot cylindrical drum 7 one

from feet to a predetermined angle leads to the tension of the corresponding 1 Wetsi endless flexible link 9. which, in turn, causes the ciliidrich drum 7 to rotate, by diverging the legs by the same angle. Operational efficiency of device 1 is ensured by the fact that the infinite bending of the north-west has a constant tipping point from the cylinder and is tangential to them at not 3.);

The subject is invented and

The leveling device for self-erecting gantry cranes, containing 1, its flexible connections, made in the form of figure eight and attached to opposite legs of the crane, are characterized in that, in order to simplify the design and ensure the same

of the angle of rotation of the legs, on the upper part of the legs there is mounted a railing beam, bearing drums mounted on the axis of rotation of the legs, which are covered by an endless flexible connection.

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