| 摘要 |
PROBLEM TO BE SOLVED: To obtain a structure capable of preventing the occurrence of a pressure difference between a rolling element arranging space 16 and an external space, even if the bearing temperature changes, in the structure for fluid-tightly blocking up mutual end surfaces in the axial direction of both inner ring elements 11 and 11 by a seal ring 7 installed in a recessed groove 18, by forming the recessed groove 18 on an inner peripheral surface of a butting part of the mutual end surfaces in the axial direction of a pair of inner ring elements 11 and 11. SOLUTION: This seal ring 7 is constituted by combining an annular ring-shaped sealant and an annular ring-shaped or segmental annular ring-shaped core material for reinforcing this sealant. Among these, the sealant is made of a water repellent-oil repellent, ventilating and flexible raw material, and the core material is made of an elastic material. The sealant is pressed to a bottom surface of this recessed groove 18 based on elastic force of the core material in a state of installing the seal ring 7 in the recessed groove 18. The problem is solved by adopting such a constitution. COPYRIGHT: (C)2010,JPO&INPIT
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