| 摘要 |
PURPOSE: To provide a structure of a thrust roller bearing capable of being assembled only in the normal manner to a retaining part of a casing, and to enable the assembly to the retaining part with large dimension in the axial direction. CONSTITUTION: In the assembly, a folded vertical wall 6b formed on the outer circumferential edge of a lace 4b is internally fitted in a retaining part which is a circular recessed part. A plurality of extending pieces 17 are extended from the edge of this folded vertical wall 6b, and a projecting part 18 projected outward in the radial direction is formed on the tip part of each extending piece 17. Even if the projecting part is assembled in the opposite direction, this projecting part 18 is interfered with the circumferential edge part of the retaining part to make the assembly impossible. |
