| 摘要 |
A bidirectional cylinder jack is provided to improve the pressing and support force whereby the internal space of the housing is divided with a partition and placing two cylinders in the divided spaces symmetrically. A bidirectional cylinder jack comprises a housing(110) having an internal cavity(112) and openings on either side, a pair of length adjustable members(130,140) which are contained in the internal cavity of the housing and protrude/retract through the openings in multiple stages, and a partition(120) formed in the center of the internal cavity to set two hydraulic cylinders symmetrical. The length variable member includes a large diameter shaft(131) which is contained in the housing to move in and out, a small diameter shaft(134) which is contained in the receiving part of the large diameter shaft to move in and out and is provided with a support plate(142) on the end, and a fixing member(140) which is equipped in the large and small diameter shafts and fixes the length. |
