DOUBLE-ROW SELF-ALIGNING ROLLER BEARING

Title:

DOUBLE-ROW SELF-ALIGNING ROLLER BEARING

Document Type and Number:

WIPO Patent Application WO/2019/022161

Kind Code:

A1

Abstract:

Provided is a double-row self-aligning roller bearing which is suitable for uses in which an axial load and a radial load are received and different-size loads act on the two rows of rollers arranged in the axial direction, and which has sufficiently increased load capacity of the rollers in the row receiving an axial load by suitably defining the ratio of the contact angles and the range of the contact angles of the two rows of rollers within dimensionally standard constraints. In this double-row self-aligning roller bearing (1), the outer race surface (3a) has a spherical shape, and the two rows of rollers (4, 5) have a cross-sectional shape in which the outer peripheral surface follows the outer race surface (3a). The rollers (4, 5) in the two rows have mutually different lengths, the length (L2) of the long rollers (5) is at least 36% of the bearing width (B), and the ratio of the contact angle (θ1) of the short rollers (4) and the contact angle (θ2) of the long rollers (5) is within the range 1:4 to 1:2. The range of the contact angle (θ1) of the short rollers (4) is 3°-5°, and the range of the contact angle (θ2) of the long rollers (5) is 11°-14°.

Inventors:

SEKO KAZUMASA (JP)
INOUE YASUYUKI (JP)
YAMAMOTO TAKASHI (JP)
HORI MICHIO (JP)

Application Number:

PCT/JP2018/027964

Publication Date:

January 31, 2019

Filing Date:

July 25, 2018

Export Citation:

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Assignee:

NTN TOYO BEARING CO LTD (JP)

International Classes:

F16C23/08; F16C33/36; F16C33/46; F16C33/58

Domestic Patent References:

WO2016146115A1	2016-09-22
WO2005050038A1	2005-06-02

Foreign References:

JP2004245251A	2004-09-02
DE102004047881A1	2006-04-06
JP2013228010A	2013-11-07
JP2011153670A	2011-08-11
JP2012057722A	2012-03-22
JP2013096448A	2013-05-20
US20140112607A1	2014-04-24

Other References: