CROSSED ROLLER BEARING - HARMONIC DRIVE SYSTEMS

Title:

CROSSED ROLLER BEARING

Document Type and Number:

WIPO Patent Application WO/2017/109826

Kind Code:

A1

Abstract:

The roller insertion groove (6) of the inner ring (3) of a crossed roller bearing is provided with an outer circumferential surface-side groove opening (62) that is exposed to an inner ring-side V-groove (32). Said groove opening (62) is defined by a circumferential direction opening edge (62a) that extends in the circumferential direction along the inner ring-side V-groove (32) and from both ends thereof, side opening edges (62b, 62c) that extend to the ring-shaped end face (33) of the inner ring (3). Concentration of stress occurs in the corners between the circumferential direction opening edge (62a) and the side opening edges (62b, 62c). The circumferential direction opening edge (62a) is formed so as not to coincide with the minimum outer diameter section (38) of the inner ring-side V-groove (32). Compared to when the circumferential direction opening edge (62a) coincides with the minimum outer diameter section (38), it is possible to significantly mitigate stress concentration that occurs in the corners and to improve the fatigue strength of the inner ring (3).

Inventors:

MURAYAMA YUYA (JP)
KANAYAMA NAOKI (JP)

Application Number:

PCT/JP2015/085623

Publication Date:

June 29, 2017

Filing Date:

December 21, 2015

Export Citation:

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Assignee:

HARMONIC DRIVE SYSTEMS (JP)

International Classes:

F16C19/36; F16C33/58

Foreign References:

JP2011106544A	2011-06-02
JP2001116040A	2001-04-27
JP2010151152A	2010-07-08

Other References: