Crane and its luffing system
A crane and telescopic oil cylinder technology, applied in cranes and other directions, can solve problems such as uneven force, many structural components, and affect safety, and achieve the effects of simple and reliable expansion and contraction process, improved spatial structure, and simplified structure
Active Publication Date: 2017-09-19
XCMG CONSTR MACHINERY
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Problems solved by technology
[0009] Although the above two luffing systems can realize the lifting arm of the jib, the structure is complex, not only need to configure the luffing pulley block, but also need to configure the corresponding pull rope, luffing winch, power system and control variable for driving the luffing winch. The control system for the hoisting action has a high cost, and there are many structural components, and the accumulation of coordination errors between the components leads to low reliability of the entire system
In addition, the structure of the luffing pulley block and the stay rope is likely to cause uneven force, which makes the pulley block deflect and affects safety
Method used
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Embodiment Construction
[0034] The core of the invention is to provide a crane and its luffing system. The luffing system has a simple structure and high reliability.
[0035] In order to enable those skilled in the art to better understand the solution of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.
[0036] For ease of understanding and concise description, the following description will be made in conjunction with the crane and its luffing system, and the beneficial effects will not be discussed again.
[0037] Please refer to image 3 , image 3 It is a structural schematic diagram of a luffing system of a crane provided by the present invention.
[0038] Such as image 3 As shown, the crane includes a turntable 21 and a jib 22 hinged to the turntable 21 , and also includes a luffing system, which is used for lifting the jib 22 .
[0039] In this embodiment, the luffing system inc...
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The invention discloses a crane and an amplitude variable system thereof. The amplitude variable system comprises a propeller strut and an inhaul cable, wherein the propeller strut is fixedly arranged on a rotary table of the crane; the amplitude variable system further comprises a telescopic oil cylinder; one end of the telescopic oil cylinder is connected with the top of the propeller strut and the other end of the telescopic oil cylinder is connected with one end of the inhaul cable; the other end of the inhaul cable is connected with the head of a boom frame of the crane. According to the amplitude variable system disclosed by the invention, the telescopic oil cylinder is used for replacing an amplitude variable pulley block, a pull rope, a pulley block winch and the like so that the structure of the amplitude variable system is obviously simplified and the cost is reduced; meanwhile, compared with the manner of controlling the pull rope to adjust the distance between two pulley blocks of the amplitude variable pulley block, the amplitude variable system has the advantages that a telescopic process of the telescopic oil cylinder is simpler and more reliable and the safety is high.
Description
technical field [0001] The invention relates to the technical field of engineering machinery, in particular to a crane and a luffing system thereof. Background technique [0002] Please refer to figure 1 , figure 1 It is a structural schematic diagram of a luffing system of an existing crane. [0003] The crane includes a turntable 11 and a jib 12 arranged on the turntable 11 , and also includes a luffing system, which is used for lifting the jib 12 . [0004] As shown in the figure, the luffing system includes a gable frame 15 fixed on the turntable 11, a luffing pulley block and a cable 16; wherein, the luffing pulley block includes a fixed pulley block 131 and a movable pulley block 132, and the fixed pulley block 131 is fixed on the The top of the herringbone frame 15, the moving pulley block 132 and the head of the jib frame 12 are connected by the aforementioned stay cable 16. The luffing system also includes a luffing winch fixed on the turntable 11 , the stay rop...
Claims
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IPC IPC(8): B66C23/82
CPCB66C23/826
Inventor 左其伟赵江平余钦伟代振华
Owner XCMG CONSTR MACHINERY