SHOCK ABSORBING SPINDLE Russian patent published in 2004 - IPC

FIELD: hydraulic well-boring equipment. SUBSTANCE: device has body, stabilizer, connecting switcher, 20-40 stator hubs of shock-proof rubberized bearings. Each bearing consists of a core, which is immersed into rubber compound in a mold together with corresponding hub and vulcanized. Radial gap of a core relative to a hub during supplying of rubber into mold is in range from 1 to 4 mm. Hollow spindle shaft has a switcher on its lower end, outer surface of which has hardness in range from 54 to 68 Rockwell units and is in contact with rubber insert of a nipple. Rotor bushings, bushings and disks are fixed to the hollow shaft by means of a half-coupling nut and supported by rubber-coated bearing cores. Bushings are supported by rubber insert of connecting switcher. Longitudinal axis of hollow shaft is centered relative to body axis by means of inserts. Inserts are pressed or glued into connecting switcher and nipple. Shock-absorption and dissipation of dynamic loads caused by soil or tooth-like oscillations of chisel's center of gravity and transferred onto spindle shaft is performed by displacing rubber layers under cores and hubs of spindle bearings. EFFECT: increased durability and reliability of shock-absorbing spindle. 4 cl, 4 dwg