| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a revolving seat bearing increasing the allowable load in application of the load, and preventing the edge load caused by abutting of a lower end of a fourth raceway surface on a main roller. <P>SOLUTION: The revolving seat bearing 10 includes an outer ring 11 having an outer ring groove 21 having a V shaped cross-section on an inner peripheral surface side, and an inner ring 12 having an inner ring groove 31 having a V shaped cross-section on an outer peripheral surface side. The main roller 13 and an inverse roller 14 are alternately arranged between the outer ring 11 and the inner ring 12. The outer ring 11 has a curved inner peripheral surface 28 smoothly connecting a diameter small inner peripheral surface 26 and a first raceway surface 23. The inner ring 12 has a curved outer peripheral surface 38 smoothly connecting the fourth raceway surface 34 and a diameter large outer peripheral surface 37. The main roller 13 has a chamfered surface 51 and a crowning surface. When the load is applied, part of the outer peripheral surface of the main roller 13 other than the chamfered surface 51 is abutted on the first raceway surface 23 and the fourth raceway surface 34 on the total width thereof. <P>COPYRIGHT: (C)2010,JPO&INPIT |
