Cylinder opening structure of bottom-lifting jack

The utility model discloses a cylinder opening structure of a bottom-lifting jack. The cylinder opening structure of the bottom-lifting jack comprises a cylinder barrel, a guide sleeve, a tri-semi-ring structure and a cylinder cover, wherein an annular groove is formed in the outer circumferential s...

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Bibliographic Details
Main Authors HUANG YOUXIAN, DU GUILI
Format Patent
LanguageChinese
English
Published 06.11.2013
Subjects
EARTH DRILLING
FIXED CONSTRUCTIONS
GALLERIES
HAULING
HOISTING
HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDEDFOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCEDIRECTLY TO THE SURFACE OF A LOAD
LARGE UNDERGROUND CHAMBERS
LIFTING
MINING
PERFORMING OPERATIONS
SHAFTS
TRANSPORTING
TUNNELS
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Summary:The utility model discloses a cylinder opening structure of a bottom-lifting jack. The cylinder opening structure of the bottom-lifting jack comprises a cylinder barrel, a guide sleeve, a tri-semi-ring structure and a cylinder cover, wherein an annular groove is formed in the outer circumferential surface of the cylinder cover, a threaded hole is formed in the position, corresponding to the annular groove, of the cylinder barrel and is provided with a screw, the front end of the screw is inserted into the annular groove, the outer end surface of the cylinder cover is higher than the end surface of a cylinder opening of the cylinder barrel or is flush with the end surface of the cylinder opening, and a flange is arranged in the position, higher than the end surface of the cylinder opening of the cylinder barrel, of the outer end surface of the cylinder cover. The cylinder opening structure of the bottom-lifting jack can effectively prevent coal ash from accumulating at the cylinder opening, and is easier to de
Bibliography:Application Number: CN20132287754U