| 摘要 |
A hydraulic screw jack is provided to prevent a support from falling down by obstructing an upper bracket from being pushed toward a jack housing using a stop nut even when hydraulic pressure of a hydraulic cylinder inside the jack housing is released. A hydraulic screw jack includes a jack housing, an upper bracket(200), a lower bracket(300), and a stop nut(400). The jack housing has an upper coupling member at an upper part, a lower coupling member at a lower part, and jack fixing members(130) to install a hydraulic cylinder(500) inside. The upper bracket is coupled with the upper coupling member of the jack housing to be in contact with one side of a support bar. The lower bracket is fastened to the lower coupling member of the jack housing by a screw to be in contact with one of ground and an H-beam. The stop nut is fastened to the upper coupling member of the jack housing by a screw to fix a position of the upper bracket. |
