Patent ID: 6343644
Filing Date: 2002-02-05
Classification: F16C,Y10S

Abstract:
A hollow screw cooling device, which comprises:a hollow screw, which is provided with a coolant conduit therein extending along an axial direction; a bearing device, which is installed on a driven end of said hollow screw, said bearing device having a first set of threaded holes and a second set of threaded holes; a plurality of bearings arranged along the axial direction and being disposed within said bearing device; a press board fixing said bearings within said bearing device, said press board being formed with a first set of through holes and a second set of through holes; a first set of threaded fasteners, each threaded fastener of said first set extending through a respective through hole of said first set of through holes in said press board and being threadably received by a respective threaded hole of said first set of threaded holes so as to fix said press board on an outer surface of a bearing base of said bearing device; an oil-proof base, which is provided with a plurality of seals for preventing coolant leakage, said oil-proof base being provided with a set of apertures aligned with said second set of through holes in said press board and aligned with said second set of threaded holes; and a second set of threaded fasteners, each threaded fastener of said second set of threaded fasteners respectively extending through a respective aperture in said oil-proof base, through a respective through hole of said second set of through holes in said press board, and being threadably received by a respective threaded hole of said second set of threaded holes so as to fix said oil-proof base to said bearing device; wherein each of said threaded fasteners of said second set of threaded fasteners is removable from the respective threaded holes of said second set of threaded holes so as to allow said oil-proof base to be removed from said bearing device; and wherein when said oil-proof base is removed from said bearing device, each of said threaded fasteners of said first set of threaded fasteners remains within the respective through holes of said first set of through holes in said press board and remain threadably received by the respective threaded holes of said first set of threaded holes, so as to keep said press board fixed to the outer surface of the bearing base of said bearing device.