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Crane, guying mast and pulling pre-tightening device of guying mast

A technology for cranes and masts, applied in the field of cranes, can solve the problems of high performance requirements of tensioning cylinders, achieve the effects of reducing requirements, facilitating preload adjustment, and improving reliability

Active Publication Date: 2013-04-03
ZOOMLION HEAVY IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The present invention aims to provide a crane, a super-lifting mast and its front tensioning pretensioning device to solve the problem in the prior art that pretensioning is usually performed when the boom is at a certain angle and the performance of the tensioning oil cylinder is high.

Method used

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  • Crane, guying mast and pulling pre-tightening device of guying mast
  • Crane, guying mast and pulling pre-tightening device of guying mast
  • Crane, guying mast and pulling pre-tightening device of guying mast

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Embodiment Construction

[0026] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings, but the present invention can be implemented in many different ways defined and covered by the claims.

[0027] As a first aspect of the present invention, a forward tension pretensioning device for super-lifting a mast is provided. like figure 2 and image 3 As shown, the front tensioning device includes: a first support 10; a second support 20; a moving lug 30, and the moving lug 30 is located between the first support 10 and the second support 20; an elastic element 40 , the first end of the elastic element 40 is connected with the first support 10, the second end of the elastic element 40 is connected with the first end of the moving lug 30; adjust the oil cylinder 50, the first end of the adjustment oil cylinder 50 is connected with the second support 20, and the second end of the adjusting cylinder 50 is connected with the second end of the mo...

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Abstract

The invention provides a crane, a guying mast and a pulling pre-tightening device of the guying mast. The pulling pre-tightening device comprises a first base, a second base, a movable lug, an elastic component and an adjustment cylinder, wherein the movable lug is located between the first and second bases; the first end of the elastic component is connected with the first base and the second end of the elastic component is connected with the first end of the movable lug; and the first end of the adjustment cylinder is connected with the second base, and the second end of the adjustment cylinder is connected with that of the movable lug. By telescopic movement of the adjustment cylinder, the pulling point position of a front tightening steel wire rope and the guying mast is changed, the effect of adjusting the pre-tightening force of the front tightening steel wire rope is achieved, and the structural rigidity of the whole boom can be adjusted.

Description

technical field [0001] The invention relates to the field of cranes, in particular to a crane, a superlift mast and a front tension pretensioning device thereof. Background technique [0002] figure 1 A schematic diagram of a prior art crane and its superlift mast is shown. The crane includes a jib 120 , a movable pulley 110 is mounted on the head of the jib 120 , and a superlift mast 130 is pivotably connected with the jib 120 . The front tensioning device includes a front tensioning wire rope 100, one end of the front tensioning wire rope 100 is fixedly connected with the super lifting mast 130, and the other end is connected with the ratchet winch 90 on the super lifting mast 130 after walking around the movable pulley 110. The crane also includes a rear tensioning device 140, one end of which is connected with the superlift mast 130, and one end is connected with the vehicle body. When the ratchet hoist 90 rotates under the action of the tensioning oil cylinder, a pre...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B66C23/62B66C23/72B66C23/64
Inventor 颜世军王平周磊覃斌
Owner ZOOMLION HEAVY IND CO LTD
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