Title:
TAPERED ROLLER BEARING
Document Type and Number:
WIPO Patent Application WO/2021/039532
Kind Code:
A1
Abstract:
[Problem] To provide a tapered roller bearing with which it is possible to hold a lubricant with an oil groove alone, and to prevent seizure under a lubricating environment with intermittent lubricant supply or under a minute lubricant environment. [Solution] A holder 14 of a tapered roller bearing 10 has a first gap S1 between an axial inner end surface 16a of a small-diameter-side annular part 16 and a small-diameter-side end surface 13c of a tapered roller 13, and has a second gap S2 between an axial inner end surface 15a of a large-diameter-side annular part 15 and a large-diameter-side end surface 13b of the tapered roller 13. The holder 14 is provided movably along an axial direction in a predetermined range. The axial inner end surface 15a of the large-diameter-side annular part 15 is provided with a plurality of oil grooves 20 that hold a lubricant using capillary force. When the holder 14 moves in the axial direction to the small-diameter side of the tapered roller 13, the plurality of oil grooves 20 come into contact with the large-diameter-side end surface 13b of the tapered roller 13. When the holder 14 moves in the axial direction to the large-diameter side of the tapered roller 13, the plurality of oil grooves 20 separate from the large-diameter-side end surface 13b of the tapered roller 13.
Inventors:
ZEMBUTSU MAKOTO (JP)
Application Number:
PCT/JP2020/031268
Publication Date:
March 04, 2021
Filing Date:
August 19, 2020
Export Citation:
Assignee:
NSK LTD (JP)
International Classes:
F16C19/36; F16C33/34; F16C33/46; F16C33/66
Foreign References:
| JP2015183804A | 2015-10-22 | |||
| JP2018159411A | 2018-10-11 | |||
| JPH08200376A | 1996-08-06 | |||
| JP2017166641A | 2017-09-21 |
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