Title:
TAPERED ROLLER BEARING
Document Type and Number:
WIPO Patent Application WO/2023/037967
Kind Code:
A1
Abstract:
The present invention provides an inner ring guide-type tapered roller bearing (1) wherein: a smaller diameter-side annular portion (6) and/or a larger diameter-side annular portion (7) of a holder (5) has a flange portion (6a, 7a) extending radially inward from a columnar portion (8) via an arc-shaped bent portion (6b, 7b) and has notch-shaped oil passages (10, 11) at multiple locations on the inner peripheral edge of the flange portion (6a, 7a); and with a projected area (A) of the oil passages (10, 11) in the axial direction of the bearing, the radius (r) of curvature of the oil passages (10, 11) at the center in the width direction, the inner diameter (DI) of the flange portion (6a, 7a), and the outer diameter (DO) of the bent portion (6b, 7b), the dimensionless number (Z) is defined by the following formula and is 1.55-2.66. Z=ADI
2/π(DO
2 - DI
2)r2
Inventors:
NAKATOCHI NAOKI (JP)
TOHO SHOUTA (JP)
TOHO SHOUTA (JP)
Application Number:
PCT/JP2022/033029
Publication Date:
March 16, 2023
Filing Date:
September 01, 2022
Export Citation:
Assignee:
NTN TOYO BEARING CO LTD (JP)
International Classes:
F16C33/46; F16C19/36; F16C33/66
Foreign References:
| CN103410853A | 2013-11-27 | |||
| CN203463492U | 2014-03-05 | |||
| FR3040749A1 | 2017-03-10 | |||
| JP2018044576A | 2018-03-22 |
Attorney, Agent or Firm:
SUGIMOTO, Shuji et al. (JP)
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