| 摘要 |
PROBLEM TO BE SOLVED: To prevent separation between annular grooves and a contact face of a seal material caused by the moment load and the vibration of a revolving bearing part in the digging and the hoisting of a load, and prevent the seal from dropping out from the annular grooves, even if it is separated. SOLUTION: In this seal-mounting structure of a revolving bearing, annular grooves are formed on an outer peripheral surface of an inner ring and an inner peripheral surface of an outer ring of the revolving bearing, second grooves are respectively formed in the annular grooves to fit a seal material into the annular grooves and the second grooves, the seal material is provided with a cavity part on an approximately central part of its cross section for easily inserting the seal material into the annular grooves and the second grooves, and further a slit is formed between the cavity part and the inner peripheral surface or the outer peripheral surface of the seal material. |
