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Title:
RETAINER MADE FROM RESIN, AND ROLLER BEARING
Document Type and Number:
WIPO Patent Application WO/2019/189779
Kind Code:
A1
Abstract:
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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Inventors:
ISHIZAKI Yuumi (3066 Aza Oyumida, Oaza Higashikata, Kuwana-sh, Mie 78, 〒5118678, JP)
NAKATOCHI Naoki (3066 Aza Oyumida, Oaza Higashikata, Kuwana-sh, Mie 78, 〒5118678, JP)
ISHIBASHI Hiroki (3066 Aza Oyumida, Oaza Higashikata, Kuwana-sh, Mie 78, 〒5118678, JP)
MATSUMOTO Akio (3066 Aza Oyumida, Oaza Higashikata, Kuwana-sh, Mie 78, 〒5118678, JP)
Application Number:
JP2019/014043
Publication Date:
October 03, 2019
Filing Date:
March 29, 2019
Export Citation:
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Assignee:
NTN CORPORATION (3-17, Kyomachibori 1-chome Nishi-ku, Osaka-sh, Osaka 03, 〒5500003, JP)
International Classes:
F16C33/41; F16C9/02; F16C33/44; F16C33/49; F16C33/56; B29C45/17
Domestic Patent References:
WO2017164398A12017-09-28
Foreign References:
JP2015197210A2015-11-09
JP2013223950A2013-10-31
JPH07504963A1995-06-01
JP2007078029A2007-03-29
JP2016044773A2016-04-04
Attorney, Agent or Firm:
KAMADA Naoya et al. (18-12, Nipponbashi 1-chome Chuo-ku, Osaka-sh, Osaka 73, 〒5420073, JP)
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