| 摘要 |
PURPOSE: A hydraulic jack with a screw-type lock is provided to make the movement change and the rod movement easy since a ball screw structure is used to change the vertical movement of the rod to the rotary movement of a guide shaft. CONSTITUTION: A hydraulic jack with a screw-type lock comprises a cylinder(10), a rod(15), a foot support(18), a guide shaft(14), a nut(16), a rotator(13) and a lock(20). Each hydraulic port(11,12) is installed on the upper and lower ends of the cylinder. The rod is lift in the cylinder. The foot support is connected to the lower end of the rod. The guide shaft is rotatably installed in the cylinder. The nut is screwed to the guide shaft. The rotator is installed on the upper end of the guide shaft. The lock is installed in the cylinder. |
