Preloaded oil cylinder and hoisting machinery

A technology for pre-tightening oil cylinders and cylinder rods, which is used in cranes, fluid pressure actuation devices, transportation and packaging, etc. It can solve the problems of high resistance when unlocking, unable to unlock, and short pawls, so as to reduce the problem of unlocking. , lock and unlock smooth effects

Inactive Publication Date: 2018-09-28
XUZHOU HEAVY MASCH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] However, when the pawl is pulled by the small oil cylinder, the force arm of the pawl is relatively short. When the cylinder rod of the pre-tightening cylinder is retracted, if it is not fully retracted in place, the resistance when the pawl is locked will be very large, which will cause The resistance is also relatively large when unlocking, so there may be problems that the lock cannot be unlocked

Method used

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  • Preloaded oil cylinder and hoisting machinery
  • Preloaded oil cylinder and hoisting machinery
  • Preloaded oil cylinder and hoisting machinery

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Embodiment Construction

[0043] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Apparently, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts fall within the protection scope of the present invention.

[0044] In describing the present invention, it should be understood that the terms "center", "transverse", "longitudinal", "front", "rear", "left", "right", "upper", "lower", " The orientations or positional relationships indicated by "vertical", "horizontal", "top", "bottom", "inner" and "outer" are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and Simplifie...

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PUM

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Abstract

The invention relates to a preloaded oil cylinder and hoisting machinery. The preloaded oil cylinder comprises a cylinder tube (10) and a cylinder rod (20); the cylinder rod (20) is arranged in the cylinder tube (10); lock holes (25) are formed in one of the cylinder tube (10) and the cylinder rod (20); a lock piece (13) is arranged on the other of the cylinder tube (10) and the cylinder rod (20);and the lock piece (13) is inserted into the lock holes (25) so as to lock the cylinder rod (20) relative to the cylinder tube (10). The hoisting machinery comprises the preloaded oil cylinder. The cylinder rod is locked and unlocked by inserting the lock piece into the lock holes. Compared with a pawl form adopted in the prior art, the cylinder rod can be locked and unlocked more smoothly in themode, so that the problem that the cylinder rod cannot be locked is reduced.

Description

technical field [0001] The invention relates to the technical field of construction machinery, in particular to a preload oil cylinder and a lifting machine. Background technique [0002] Large-tonnage telescopic boom cranes use telescopic booms, which can be divided into truck cranes, all-terrain cranes and crawler telescopic boom cranes according to the chassis used. In order to improve the lifting performance, the telescopic boom crane is equipped with a super-lifting device, referred to as "super-lifting", which is installed on the head of the basic arm of the telescopic boom to reduce the lifting deformation of the telescopic boom, thereby improving the lifting performance. The upper end of the super-lift is connected to the head of the telescopic arm through the super-lifting steel wire rope. Before hoisting, the pre-tightening steel wire rope is retracted through the pre-tightening oil cylinder. Mechanical locking fixes the length of the wire rope. [0003] Such as ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F15B15/26B66C23/72
CPCF15B15/26B66C23/72B66C2700/03
Inventor 单增海佟雪峰赵瑞学张正得兰天秦小虎杜园房磊
Owner XUZHOU HEAVY MASCH CO LTD
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