Title:
SWING BEARING AND ITS PROCESSING METHOD
Document Type and Number:
Japanese Patent JP2018179291
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a swing bearing which can efficiently finish a raceway surface even if a height of a shoulder of the raceway surface is heightened, and its processing method.SOLUTION: In a swing bearing, annular raceway surfaces 11, 21 are formed at a peripheral face on which an inner ring 1 and an outer ring 2 oppose each other, and a plurality of rolling bodies 3 are interposed between the raceway surfaces 11, 21. The raceway surfaces 11, 21 have main raceway surface parts 11a, 21a having circular arc shapes in cross sections, and auxiliary raceway surface parts 11b, 21b which smoothly continue to one-side ends of the main raceway surface parts 11a, 21a, and whose cross section shapes are formed of lines located outside a center of a circle arc rather than circular arc extension lines forming the cross sections of the main raceway surfaces 11a, 21a. Positions of the auxiliary raceway surface parts 11b, 21b in a bearing radial direction at opposite end side ends with respect to the main raceway surface parts 11a, 21a are located at positions which are substantially the same as a position of the center of the circle in the bearing radial direction, or remote from bottoms of the raceway surfaces 11, 21 rather than the position of the center of the circle arc in the bearing radial direction.SELECTED DRAWING: Figure 1
Inventors:
NAKAJO SHINYA
Application Number:
JP2018057554A
Publication Date:
November 15, 2018
Filing Date:
March 26, 2018
Export Citation:
Assignee:
NTN TOYO BEARING CO LTD
International Classes:
F16C33/58; F16C19/18; F16C33/64; F16C43/04
Attorney, Agent or Firm:
Masashi Noda
Shuji Sugimoto
Shuji Sugimoto