Cranes and their lifting mechanisms
A crane and sling technology, which is applied in the direction of the spring mechanism, the hoisting device, etc., can solve the problems of asynchronous rise and fall of the hook, and achieve the effect of convenient use.
Active Publication Date: 2020-05-08
YANTAI RAFFLES SHIPYARD +1
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Problems solved by technology
[0009] The object of the present invention is to provide a crane and its lifting mechanism to solve the problem that the lifting mechanism of the crane in the prior art is not synchronized when the lifting mechanism is empty or with a small load.
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[0028] Typical embodiments that embody the features and advantages of the present invention will be described in detail in the following description. It should be understood that the present invention is capable of various changes in different embodiments without departing from the scope of the present invention, and that the description and illustrations therein are illustrative in nature and not limiting. this invention.
[0029] refer to Figure 5 The present invention provides a hoisting mechanism 1, which mainly includes a winch 11, a plurality of pulley blocks 12, a hook group composed of a plurality of hooks 13, and a leveling device 17 for balancing the lifting height of the hooks 13.
[0030] The winch 11 is simplified schematically in the figure, and its actual structure can refer to the prior art.
[0031] Each pulley block 12 is connected in series by suspension rope 14 and driven by winch 11, Figure 5 Four groups of pulley blocks 12 have been illustrated in th...
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The invention provides a crane and a lifting mechanism. The lifting mechanism comprises a winding engine, a plurality of pulley blocks which are connected in series through a lifting rope and are driven by the winding engine and a plurality of lifting hooks which are separately correspondingly connected with each pulley block, wherein each pulley block comprises at least one fixed pulley and a matched moving pulley, and the lifting hooks are connected with the moving pulleys. The lifting mechanism further comprises a leveling device, wherein the leveling device comprises a sensor, a processing unit and a plurality of motors; the sensor is arranged corresponding to the lifting rope and used for acquiring the speed of the lifting rope; the processing unit is electrically connected with the sensor so as to carry out calculation according to the speed of the lifting rope, detected by the sensor, and output a control instruction; the motors are electrically connected with the processing unit and output rotating movement according to the control instruction of the processing unit at corresponding rotating speeds; and the motors separately correspondingly drive the fixed pulley of one pulley block to rotate, thereby ensuring the synchronous lifting and lowering of the lifting hooks connected by the pulley blocks. The lifting mechanism can ensure the synchronous lifting and lowering of the lifting hooks in the lifting mechanism.
Description
technical field [0001] The invention relates to the field of hoisting equipment, in particular to a crane and its hoisting mechanism. Background technique [0002] Large-tonnage cranes are specially designed for lifting large objects (such as offshore platform modules, large transport ships, etc.), figure 1 A structure of a 20,000-ton crane is shown, which is provided with 12 sets of lifting mechanisms 1 . In each set of hoisting mechanism 1, a hoist 11 drives a set of hooks 13 up and down through a suspension rope 14 (generally a wire rope) and an adapted pulley block 12 . [0003] see also figure 1 and figure 2 , the hoisting mechanism 1 is provided with four suspension hooks 13, and a group of pulley block 12 is set corresponding to each suspension hook 13 in the hoisting mechanism 1. Each set of pulley blocks 12 is composed of a plurality of fixed pulleys 121 and a suitable number of movable pulleys 122, each fixed pulley 121 is coaxially arranged, and each movable ...
Claims
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IPC IPC(8): B66D1/28B66D1/48
CPCB66D1/28B66D1/485B66D2700/0183
Inventor 李天侠未俊丰张津维高奎增张晓利
Owner YANTAI RAFFLES SHIPYARD