| 摘要 |
A rotary cutter mount for an earth-boring cutter is provided which includes a ball bearing journal [100] adapted to be coupled to a cutter body [210], having a minimum [110] and a maximum [120] cylindrical diameter, and a first [115] and second [116] mounting ends. The maximum diameter [120] defines a journal body [122] which includes an exterior surface adapted to be rotationally coupled to the interior surface of the cutter body [210] so as to allow the cutter body [210] to rotate freely with respect to the bearing journal [110]. The minimum [110] diameter defines a shaft portion having sealing surfaces. The first [115] and a second [116] mounting ends are shaped to enable a rotationally fixed positioning of the bearing journal [100] in a yoke of a corresponding cutter head-plate support bracket. A row of ball-bearing races [126] is recessed to extend circumferentially about the exterior surface of the journal body [122]. A ball loading passage [118] is formed to extend as a clear bore axially outward through the journal body [122] of the bearing journal [100]. |
