The invention provides a telescopic cylinder, a landing leg control system and a crane. The telescopic cylinder includes a main barrel body having an inner cavity passing to an axial second end of the main barrel body from an axial first end of the main barrel body; a first piston assembly movably arranged in the inner cavity along the axial direction of the main barrel body and having a first extending-out end extending out from the axial first end of the main barrel body; and a second piston assembly movably arranged in the inner cavity along the axial direction of the main barrel body and having a second extending-out end extending out from the axial second end of the main barrel body. The inner cavity is divided into a first chamber body, a middle chamber body and a second chamber body by the first piston assembly and the second piston assembly along the axial first end to the axial second end; the main barrel body is provided with a first fluid through port communicated with the middle chamber body, the first extending-out end is provided with a second fluid through port having a communication state with the first chamber body, the second extending-out end is provided with a third fluid through port having a communication state with the second chamber body. The telescopic cylinder solves the problem of relatively complex telescopic structure.
Telescopic cylinder, landing leg control system and crane
06.05.2015
Patent
Elektronische Ressource
Englisch
IPC: | B66C Krane , CRANES |
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