Marine jib crane luffing structure

A crane and luffing mechanism technology, which is applied in the field of luffing structure of marine jib cranes, can solve the problems of steel rope wear, can not meet the needs of use, low efficiency of hydraulic cranes, etc., and achieves the effect of avoiding excessive wear and saving labor in the adjustment process.

Inactive Publication Date: 2015-06-03
DALIAN BOHAI CRANE DEVICE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In view of the above problems, the present invention researches and designs a luffing structure of a marine jib crane to solve the existing crane luffing mechanism. Cantilever cranes are expensive and cannot meet people's needs.

Method used

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  • Marine jib crane luffing structure

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Embodiment Construction

[0013] Such as figure 1 As shown, a luffing structure of a marine jib crane includes a steel rope luffing mechanism 1 and a telescopic cylinder luffing mechanism 2; the steel rope luffing mechanism 1 includes: a tripod 11, a reel 12 and a steel rope 13 The telescopic cylinder luffing mechanism 2 includes: a bottom sliding mechanism 21, a rotating shaft 22 and a telescopic oil cylinder 23; Rotate at any angle on the horizontal plane, change the angle, the rear end is provided with three tripods 11, the top of each tripod 11 is provided with a reel 12 powered by a motor, the steel rope 13 on the reel 12 and the arm The top of the frame 4 is connected and fixed, so that when the reel 12 is working, the top of the boom 4 can be controlled and the angle of the boom 4 in the horizontal plane can be adjusted by retracting and releasing the steel rope 13. The middle part of the platform 3 is provided with three bottom sliding mechanisms 21, and the bottom sliding mechanism 21 can adj...

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Abstract

The invention discloses a marine jib crane luffing structure. Three booms are arranged at the front end of a platform through rotating shafts, three tripods are arranged at the rear end of the platform, a winding drum which is powered by a motor is arranged at the top end of each tripod, a steel rope on the winding drum is fixedly connected with the top end of each boom, three bottom sliding mechanisms are arranged in the middle of the platform, and are connected with telescopic oil cylinders through rotating shafts, and the top end of each telescopic oil cylinder is connected with the middle of each boom correspondingly one by one. According to the marine jib crane luffing structure disclosed by the invention, a steel rope luffing mechanism and a telescopic cylinder luffing mechanism are matched with each other for use, so that relatively light objects can be lifted by directly using the steel rope luffing mechanism when a crane lifts the relatively light objects, and when the lifted objects are overweight, firstly the telescopic cylinder luffing mechanism can be used for luffing lifting, and then the steel rope luffing mechanism is appropriately adjusted to be matched with the telescopic cylinder luffing mechanism, so as to avoid the excessive wear of a steel rope.

Description

technical field [0001] The invention relates to a luffing structure of a marine jib crane. Background technique [0002] Luffing is one of the most important functions of jib cranes. The so-called luffing refers to the angle change of the jib of the crane in the vertical plane to change the radius of the hoisted goods. At present, there are roughly three types of variable amplitude marine cranes as follows: [0003] 1. Use the motor to drive the reel and wire rope through the reducer or hydraulic transmission device and pull the front end of the crane jib to change the amplitude. This kind of crane is also called electric or hydraulic cable crane; the cost of the cable jib crane is high and requires a lot of equipment. Steel wire ropes are easy to wear, complex in structure, prone to unpredictable failures, difficult to maintain, heavy in weight, bulky and expensive. [0004] 2. Hydraulic jib cranes that use hydraulic cylinders to stretch and drive the jib to change the am...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B66C23/82
CPCB66C23/828B66C2700/0392
Inventor 朱飞超齐国庆
Owner DALIAN BOHAI CRANE DEVICE
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