SU1532518A1 - Grab - Google Patents

Abstract

The invention relates to a lifting and transport equipment, in particular to grab cranes, and can be used in any type of grab cranes for processing bulk cargo. The purpose of the invention is to increase the durability of the locking rope with a simultaneous increase in the scooping ability of the grapple. The grapple contains a head 1, a differential drum 2, rigid rods 3, a pair of jaws 4 hinged to traverse 5, supporting ropes 6, trailing ropes 7, connecting ropes 8. The grapple contains a mechanism 9 for leveling the forces between the branches of the closing rope. 2 Il.

Description

1

The invention relates to a lifting machinery industry, in particular, to grab cranes, and can be used in any type of grab cranes for the processing of bulk cargo, where double-grab winches are used.

The purpose of the invention is to increase the durability of the closing rope with a simultaneous Q temporary increase in the scooping ability of the grab ..

The diagram shows a grab; on - the scheme of storing ropes with

The grapple (figure 1) contains a head 1.5 differential drum 2, rigid couplings 5, a pair of jaws 4 hinged on the traverse 5, supported. The connecting ropes 6, the closing ropes 7, the closing ropes 8. The differential drum has the main stage, where the closing rope is fixed, and the secondary conical stage, where the closing ropes are fixed When using twin ropes. The grapple is equipped with a pair of 25 differential drums 2. To ensure the longitudinal balance of the grab, a mirror pattern of fastening the locking ropes on the main steps of the differential Q drums is fitted. To improve the layout with the main stage of the differential drum, two secondary stages on either side of it are interlocked. The grab contains a mechanism 9 for leveling the forces between the branches of the closing rope, which is a pair of cable blocks mounted on a balancer. 40

The grapple works as follows.

Before scooping, the support rope 6 is loosened. When scooping due to the action of the scooping winch 45, the closing ropes 7 are etched out, turning the differential drums 2. When the drums are turned 2. The closing rope 8 is wound up, the ends of which are fixed by JQ on the secondary, conical drums 2 "Ropes, 8, bending the rope blocks of mechanism 9, align the force-line. LIA between the branches of the closing ropes fixed on traverse 5, movement. the last upward - the head 1 and the crosshead 5 are coming together and the jaws are closed 4. As the closure of the closing ropes is wound on the conical

the steps of the differential drums 2 close the jaws 4, and the radius of the winding of the closing ropes gradually decreases. This is accompanied by a gradual increase in the gear ratio of the closing mechanism.

Claims (2)

1. A grab containing an upper traverse connected to a supporting rope, a lower traverse with jaws hinged on it, drawbars hingingly connecting the jaws to the upper traverse, and a closure mechanism containing a drum and a locking cable fixed on it, connected with a traction mechanism, which is different from the fact that, in order to ensure the durability of the closing rope with a simultaneous increase in the grabbing capacity of the grapple, it is equipped with a closing cable and equalization block placed on the lower traverse, and the drum is installed on the upper traverse and is made differential with the central cylindrical part and connected with tapered parts coaxially with it along its ends, while the closing cable is fixed with an end on the cylindrical stage of the differential drum, and the closing rope is behind fastened to the ends on the conical steps on the side of their larger diameter and bends around the equalizing block. 2. The grab under item 1, distinguishing from 10 and with the fact that it is equipped with an additional differential drum, equalization block, closing and closing ropes, and a lever mounted on the lower traverse, with equalizing blocks mounted on the arms of this lever, and the additional closing rope is fixed on the cylindrical step of the additional differential drum, with the end of the closing rope fixed on the conical steps of the main and additional differential drums and rounds the corresponding equalizing block.