| 摘要 |
PROBLEM TO BE SOLVED: To provide a slewing bearing of a construction machine in which a center polymer part is surely prevented from falling off a spacer body and a lubricating oil contained in the center polymer part is supplied to rolling elements even when the center polymer part installed in the spacer body is contracted. SOLUTION: A plurality of the rolling elements 15 and spacers 16 are alternately disposed in an annular rolling element storage space 14 formed between an inner ring 11 and an outer ring 12. The spacer 16 comprises a spacer body 17 having a hole 17b formed at the center, an outer peripheral polymer part 18 arranged on the outer periphery of the spacer body 17 and formed of a lubricating oil-containing polymer, and the center polymer part 19 formed of a lubricating oil-containing polymer. A groove 20 communicating with the hole 17b is formed in the spacer body 17. Concave polymer parts 21 formed of a lubricating oil-containing polymer, connecting the outer peripheral polymer part 18 to the center polymer part 19, and having a concave surface in contact with the rolling elements 15 is formed in the groove 20. COPYRIGHT: (C)2009,JPO&INPIT
|
