Method of fabricating inner roller and outer roller in internal-

Details Method of fabricating inner roller and outer roller in internal- Method of fabricating inner roller and outer roller in internal-

1997-06-10

1999-11-30

Cuda, I

Metal working

Method of mechanical manufacture

Roller making

298953, B23P 1500

Patent

active

059920203

ABSTRACT:
An inner roller 30 for use in an internal-meshing planetary gear construction has its inner-peripheral wall 32 formed into a shape which is brought closer to a regular polygon of n sides (where n denotes an integer of at least 3, and n=3 holds in the illustrated example). Lubricating oil is reserved in clearances H1 defined near the vertices of the regular triangle, and an inner pin 7 is retained in light touch with the three middle points P1-P3 of the respective sides of the regular triangle. Thus, the reservation of the lubricating oil and the retention of the inner pin 7 free from backlash are made consistent, thereby to relieve the backlash of the planetary gear construction and to enhance the durability thereof. The shape of the inner-peripheral wall 32 closer to the regular polygon of n 7 is obtained in such a way that the inner-peripheral wall 32 is subjected to a burnishing work in the state in which depressive forces (deforming forces) based on chucking jigs are applied to the circumferential equidistant positions of the cylindrical blank of the inner roller 30, and that strains (residual strains) remaining after the burnishing work are further enlarged by a heat treatment.

REFERENCES:
patent: 3795957 (1974-03-01), Steusloff
patent: 3816892 (1974-06-01), Karmann et al.
patent: 3927449 (1975-12-01), Gibble et al.
patent: 5148966 (1992-09-01), Minase et al.
patent: 5522124 (1996-06-01), Depperman

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