SU430035A1 - DEVICE TO TURN THE LOADING ORGAN OF THE TOWER CRANE - Google Patents

Description

one

The invention relates to lifting equipment.

Devices are known for turning a lifting body of a tower crane, comprising a trolley with a cable-driven movement and a carrying mechanism for turning.

However, the known devices contain an additional electric motor, which reduces the lifting capacity of the crane and reduces the efficiency of using such devices.

The purpose of the invention is to simplify the design by eliminating autonomous engine and suspension cable and increasing crane maneuverability.

This is achieved by the fact that in the proposed device the rotation mechanism is made in the form of a turntable mounted on a cargo trolley, on which the rotational blocks of the cargo cable are fixed, and the drive cable for moving by one end is fixed on the frame of the trolley, and its other end has two branches, envelopes blocks mounted on the head of the boom, moving in mutually opposite directions by means of a forming loop, grabbing the turntable and fastening to it at one point.

FIG. 1 shows the proposed device, a general view; in fig. 2 - cargo truck, top view; in fig. 3 - the same when turning.

The device for turning the lifting body of the tower crane consists of a turntable 1, which is attached to the cargo carriage 2 and can be rotated relative to it. The stability of the trolley when turning the crane lifting body is provided by the rollers 3. By turning

The cargo carriage platform is secured with two cargo blocks 4, each of which has two rollers 5 connected in a horizontal plane on both sides of the cargo cable. The rollers 5 are designed to prevent the cargo cable from sliding off block 4 when the platform rotates, since they unfold the unit so that its axis of rotation is always perpendicular to the cargo cable.

The turntable 1 in the horizontal plane embraces and fastens to it at one point the cable 6 of the drive of the movement of the cargo trolley, which also serves to turn the load-lifting body

the crane. The branches of the cable round the blocks 7 on the arrowhead, blocks 8 and 9 are wound on the drum 10 and attached to the cargo carriage 2. The blocks 8 are suspended at the ends of the cable 11, which goes around the blocks 12 located at the top of the crane. The cable 11 is wound on 3 reel 13, which serves to rotate the platform I and the load 14. The drum 13 of the platform rotates and the load lifting drum 15 is freely mounted on the same shaft, which is rotated through a gearbox using 5 electric motors. The torque from the shaft to the drums 13 and 15 is transmitted by a clutch. Each of these drums has a brake. The stocking of the cargo cable 16 is the same as 10 on the existing tower cranes, with blocks 4 being spaced apart, and block 17 on a hook suspension has a larger diameter. The rollers 18 serve to ensure that the cargo cable 16, coming from the cargo trolley 2, does not co-slip from block 19. The device operates as follows. To rotate the load 14, the clutch is switched so that the torque is transmitted to the drum 13. Depending on the direction of rotation of the load, the shaft rotates in one or the other direction, with the result that one of the blocks 8 rises and the other descends. One of the branches of the cable 6 is tensioned and the other is weakened, as a result of which 25 4 turn platform 1 rotates relative to the cargo carriage 2 together with the cargo block 4. Object of the invention. , characterized in that, in order to simplify the design by eliminating the autonomous engine and the overhead cable and increasing the maneuverability of the krap, the rotation mechanism is designed as mounted On the cargo trolley of the turntable, on which the rotary blocks of the cargo cable are fixed, and the cable for driving the movement with one end is fixed on the frame of the trolley, and the other end has two branches, enveloping tension blocks mounted on the boom head, moving in mutually opposite directions by means of a hinge that encircles the turntable and attaches to it at one point.