| 摘要 |
FIELD: rock cutting tools, particularly roller bits. ^ SUBSTANCE: bearing comprises leg with inclined axle, cutter with annular boring installed on the axle and locking unit. The locking unit is made of rods installed in radial axle channels so that the rods may cooperate with cutter boring walls and with rod arranged in axial channel of the axle. Rods located in radial axle channels are T-shaped and have arch-shaped transversal parts. The axle is provided with annular boring formed in radial channel plane. Outer and inner diameters of arch-shaped members correspond to outer axle diameter plane. Outer and inner diameters of arch-shaped members correspond to outer axle diameter and annular axle boring diameter. ^ EFFECT: increased operational stability of bit bearing. ^ 2 cl, 4 dwg |
