BALL BEARING

FIELD: drive assemblies for bore engines. SUBSTANCE: ball bearing consists of 8-16 rows of balls, supported by stopping stator yokes and stopping rotor yokes. Stator yokes are separated by stator insert rings. Rotor yokes are separated by rotor insert rings. Difference between inner diameter of stator insert rings and outer diameter of rotor insert rings equals balls diameter. Each stator stopping yoke consists of ring-shaped hub and washer with a constant radial gap between them from 1 to 4 mm. Said gap is filled with rubber compound, which is vulcanized in a mold to assure reliable engagement of rubber with surfaces of ring-shaped hubs and washers of stator stopping yokes, which are facing each other. Displacement of rubber layers in said radial gaps of stator yokes allows uniform distribution of axial load on ball bearing on all ball rows. EFFECT: increased reliability, facilitated shock-absorption and dissipation of shock loads caused by soil and tooth-like oscillations of chisel's center of gravity. 2 cl, 3 dwg