Search International and National Patent Collections

1. (WO2018181174) TAPERED ROLLER BEARING

Pub. No.:    WO/2018/181174    International Application No.:    PCT/JP2018/012126
Publication Date: Fri Oct 05 01:59:59 CEST 2018 International Filing Date: Tue Mar 27 01:59:59 CEST 2018
IPC: F16C 19/36
F16C 33/36
F16C 33/46
F16C 33/58
Applicants: NTN CORPORATION
NTN株式会社
Inventors: KAWAI, Takashi
川井 崇
MATSUSHITA, Tomoki
松下 知樹
Title: TAPERED ROLLER BEARING
Abstract:
In a tapered roller bearing (10), a retainer (14) includes a plurality of trapezoidal pockets, and a plurality of rollers (12) are accommodated and held in the pockets. A notch is provided in a pillar portion on a narrow side of each pocket of the retainer, with a width provided toward a large annular portion from a boundary between a small annular portion and the pillar portion. The configuration is such that lubricating oil flowing in toward an inner race (13) side from a diametrically inner side of the retainer escapes quickly from the notch toward an outer race (11) side on a diametrically outer side. A distance from an outermost surface to a bottom portion of a nitrogen-enriched layer in at least one of the plurality of rollers (12), the outer race (11) of the rollers (12) and the inner race (13) of the rollers (12) is at least equal to 0.2 mm. Logarithmic crowning is formed on a rolling surface (12A) of each roller (12).