SU455060A1 - The device for the horizontal movement of the hook cage for tower jib cranes - Google Patents

Description

one

The invention relates to lifting mechanisms for the manufacture of tower cranes with a boom, which during operation of the crane can change the angle of inclination to the horizon.

There are known devices for horizontal movement of a hook cage for tower jib cranes, including a column with a pivotally attached boom and a carriage located on the last carriage with a mechanism for its mixing, passing and passing through the carriage blocks of a cargo rope, one end fixed to the drum, the lifting and lowering of the hook clip.

The purpose of the invention is to ensure the horizontal movement of cargo along an inclined boom.

This is achieved by the fact that in the proposed device the suspension end of the load rope is fixed on an auxiliary drum connected through a speed box with a carriage movement drive.

FIG. 1-3 shows the proposed device.

The device is mounted on a tower crane containing a column 1 with an arrow 2 hinged to it, on which carriage 3 is located with a hook holder 4 suspended from it and a cargo cable 5 passing through it. One end of the rope 5 is fixed on drum b and passes through the block 7 in the boom root and block 8 in its top, then passage through block 9 secured in carriage 3, and two blocks 10 of hook holder 4, return to carriage 3 and through its second block 11, block 12 in root of boom 2 is fixed the second end on the drum 13. Electric motor 14 of reducer 15 performs raising and lowering the bottom block 4. IG drum 13 via a gearbox connected to the drum 17, a carriage movement mechanism.

On the drum 17 from different sides are fixed two ends of the carriage rope 18, which

from the drum 17 passes through the block 19 in the boom root, then through the block 20 in its top and is fixed on the carriage 3. From the carriage 3, the rope 18 passes through the block 21 in the root of the boom 2 to the drum 17.

When the motor 22 is switched on, the drum 17 begins to rotate through the reducer 23. Moving the carriage 3 along the folding boom 2. In order for the hook carriage 4 to move horizontally when the carriage 3 moves, a certain amount of rope 5 is unrolled from the drum 13 because the drum 17 goes through the speed box 16 rotates the drum 13, performing the necessary winding of the load rope 5.

The entire movement of the carriage 3 along the inclined boom 2 causes the movement of the hook holder 4, for which horizontal movement it is necessary to observe the relation:

A B-sino.,

where A is the distance from the hook cage to

carriages vertically, B is the distance from the carriage to the point where the boom is attached to the column, and the angle between the horizon and the boom.

Subject invention

The device for the horizontal movement of the hook cage for tower boom

cranes containing a carriage moving along the boom by means of a haul rope, the ends of which are fixed to the drum of the carriage movement mechanism, the cargo cable passing through the carriage blocks whose root end is fixed to the drum of the cargo winch, along an inclined boom, the undercarriage end of the load rope is attached to an additional drum, kinematically connected through the gearbox to the carriage movement mechanism.

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Fig 2

20

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23

16 FIG.