Patent ID: 7243518

Claim:
A hydraulic cut-off press comprising a body, a base, a first raiser, a second raiser, a third raiser and a fourth raiser, and a motor, said four raisers each comprising a holder base fixedly fastened to the body, a raiser screw vertically mounted in said holder base, a transmission gear set mounted inside said holder base and meshed with said raiser screw, and an axle extended out of two opposite sides of said holder base and adapted to drive said transmission gear set to rotate said raiser screw upwards/downwards relative to said holder base to the desired elevation; wherein: said body comprises a bottom plate, which holds the holder bases of said four raisers in four corners of a top side thereof; the raiser screws of said four raisers each have a mounting block fixedly provided at a bottom side thereof and fixedly fastened to said base; the axle of said first raiser has a first end coupled to a motor at said base and a second end coupled to one end of the axle of said second raiser through a first transmission shaft; the axle of said second raiser has an opposite end fixedly mounted with a bevel gear; a second transmission shaft is installed in said body, having a first bevel gear disposed at a first end thereof and meshed with the bevel gear of the axle of said second raiser and a second bevel gear disposed at a second end thereof; the axle of said third raiser has a first end fixedly mounted with a bevel gear, which is meshed with the second bevel gear of said second transmission shaft, and a second end provided with a coupling; a third transmission shaft is installed in said body, having a first end coupled to the coupling of the axle of said third raiser for synchronous rotation with the axle of said third raiser and a second end coupled to one end of the axle of said fourth raiser through a coupling; said base comprises a plurality of vertical tracks symmetrically disposed near two opposite lateral sides thereof; said body comprises a plurality of rails respectively coupled to said vertical tracks of said base and adapted to guide movement of said body vertically along said vertical tracks relative to said base, wherein said base comprises a plurality of locating blocks symmetrically provided near front and rear sides thereof, each said locating block having a lower plate fastened to said base and an upright locating plate with a vertically extending slot in said upright locating plate; the bottom plate of said body comprises a plurality of vertical locating flanges respectively connectable to said locating blocks of said base, each said vertical locating flange having a through hole for fastening to the vertically extending slots in said upright locating plates of said locating block of said base with fastening members to lock said body to said base at the desired elevation.