RETAINER MADE FROM RESIN, AND ROLLER BEARING

WIPO Patent Application WO/2019/189779

A1

Provided is a crown-shaped retainer (1) made from resin, wherein a weld line which appears on the inner and outer peripheral surfaces of the retainer (1) has an angle of inclination of at least 17° with respect to the X axis, or weld portions A', B' or C' have predetermined cross-sectional areas which satisfy the relations represented by formulae (1) and (2) below. (1) W/(π(Da/2)2)≥0.15 (in the formula, W represents the cross-sectional area (in mm2) of the weld portion, Da represents the diameter (in mm) of the ball housed in the pocket, and (π(Da/2)2) is the cross-sectional area (in mm2) of the ball in the diameter direction.) (2) 3<(L/E3)/100<19 (in the formula, E represents elongation (in mm) in the breaking direction of the crown-shaped retainer due to tensile breaking load, and L represents the breaking load (N)/cross-sectional area of the weld portion (in mm2).)

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ISHIZAKI YUUMI (JP)
NAKATOCHI NAOKI (JP)
ISHIBASHI HIROKI (JP)
MATSUMOTO AKIO (JP)

PCT/JP2019/014043

October 03, 2019

March 29, 2019

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NTN TOYO BEARING CO LTD (JP)

F16C33/41; F16C9/02; F16C33/44; F16C33/49; F16C33/56; B29C45/17

WO2017164398A1

2017-09-28

JP2015197210A	2015-11-09
JP2013223950A	2013-10-31
JPH07504963A	1995-06-01
JP2007078029A	2007-03-29
JP2016044773A	2016-04-04

KAMADA Naoya et al. (JP)

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