Power operated rotary knife

摘要

A power operated rotary knife (100) including: an annular rotary knife blade (300) including a knife blade bearing surface (319); a blade housing (400) defining a blade housing bearing surface (459); and a blade-blade housing bearing structure (500) disposed between the knife blade bearing surface (319) and the blade housing bearing surface (459). The blade-blade housing bearing structure (500) includes a rolling bearing strip (502) having a plurality of rolling bearings (506), such as ball bearings, disposed in spaced apart relation in a flexible separator cage (508). The rolling bearing strip (502) traverses through an annular passageway (504) defined between the knife blade bearing surface (319) and the blade housing bearing surface (459) to secure the knife blade (300) to the blade housing (400) and support the knife blade for rotation about a central axis (R) with respect to the blade housing (400).

主权项

1. A power operated rotary knife comprising:
a gearbox assembly including a gearbox housing and a gear train; a blade housing coupled to the gearbox housing; and an annular rotary knife blade supported for rotation about a central axis by the blade housing, the knife blade including a set of gear teeth; the gear train comprises a pinion gear, a drive gear and a drive gear bearing support assembly, the pinion gear engaging and rotating the drive gear and the drive gear engaging and rotating the knife blade about the central axis; and the drive gear comprising a double gear including a first gear engaging and being rotated by the pinion gear about a rotational axis of the drive gear and a second gear engaging the set of gear teeth of the knife blade to rotate the knife blade about the central axis, the first and second gears of the drive gear being concentric with the drive gear rotational axis, the drive gear including a central opening, the drive gear bearing support assembly coupled to the gearbox housing and extending into the central opening of the drive gear to support the drive gear for rotation about the drive gear rotational axis.