The invention discloses a crane slender telescopic cylinder. The crane slender telescopic cylinder comprises a cylinder barrel, a first-stage piston rod, a second-stage piston rod and a rod head; a first sleeve pipe is arranged between the first-stage piston rod and the second-stage piston rod; a second sleeve pipe, a third sleeve pipe and a fourth sleeve pipe are arranged in the second-stage piston rod; the crane slender telescopic cylinder further comprises a first rodless cavity, a second rodless cavity, a first rod cavity, a first oil duct, a second rod cavity, a second oil duct and a third oil duct; the first rod cavity, the first oil duct, the second rod cavity and the second oil duct are communicated with one another; the second rodless cavity is communicated with the third oil duct; a first oil hole, a second oil hole and a third oil hole are formed in the rod head; the first oil hole is communicated with the inner cavity of the fourth sleeve pipe; the inner cavity of the fourth sleeve pipe is communicated with the first rodless cavity; the second oil hole is communicated with the third oil duct; and the third oil hole is communicated with the second oil duct. Through the above mode, the crane slender telescopic cylinder disclosed by the invention is simple and reasonable in structure; and the rodless cavity in each stage of oil cylinder can be separately controlled, so that each stage of piston rod of the telescopic cylinder can separately extend out.
Crane slender telescopic cylinder
2016-02-03
Patent
Electronic Resource
English
PISTON ROD OF TELESCOPIC OIL CYLINDER, TELESCOPIC OIL CYLINDER, AND CRANE
European Patent Office | 2022
|Telescopic cylinder, landing leg control system and crane
European Patent Office | 2015
|