Single-chain-plate expanding and shrinking mechanism

Abstract

A single-chain-plate expanding and shrinking mechanism comprises a fixing frame. At least two hinge openings are formed in the outer side of the fixing frame; each hinge opening is in hinged joint with one end of an expanding and shrinking plate through a pin shaft; the other end of each expanding and shrinking plate is in hinged joint with one end of a chain plate through a pin shaft; and the other ends of the chain plates are in hinged joint with hinge openings in a threaded sleeve through pin shafts. The threaded sleeve is provided with an internal thread; a threaded rod is provided with an external thread; and the threaded sleeve is matched with the threaded rod in a threaded mode. One end of the cylinder head of the threaded rod is embedded in a blind hole in the center of the fixing frame, and the threaded rod is made to rotate without shifting through the constraint of a baffle. A handle is matched with the other end of the threaded rod, the threaded rod can be rotated to drive the threaded sleeve to move front and back by rotating the handle so that the chain plates can be driven to move and the included angles between the chain plates and the expanding and shrinking plates can be changed; the expanding and shrinking function is achieved; and the single-chain-plate expanding and shrinking mechanism has the beneficial effects of being simple in structure, high in practicability and easy to implement.

Description

technical field [0001] The invention relates to the technical field of metallurgical equipment, in particular to a single chain plate expansion and contraction mechanism. Background technique [0002] In metallurgical equipment (such as strapping machines, corner forming machines, etc.), various strapping reels are equipped. During use, the reel on the strapping reel will expand the inner diameter of the strapping reel, and the expansion The contraction forms mainly include quadrangular pyramid, quadrangular pyramid sleeve, oblique wedge, double chain plate and multi chain plate, etc., which have complex structure, high cost, inconvenient disassembly and maintenance, and are not easy to implement. Contents of the invention [0003] In order to solve the above problems, the object of the present invention is to provide a single-chain board expansion and contraction mechanism, which has the characteristics of simple structure, strong practicability and easy implementation. ...

AI Technical Summary

Problems solved by technology

[0002] In metallurgical equipment (such as strapping machines, corner forming machines, etc.), various strapping reels are equipped. During use, the reel on the strapping reel will expand the inner diameter of the strapping reel, and the expansion The contraction forms mainly include quadrangular pyramid, quadrangular pyramid sleeve, inclined wedge, double chain plate and multi chain plate, etc., which have complex structure, high cost, inconvenient disassembly and maintenance, and are not easy to implement.

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