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1. (WO2018088515) RESIN HOLDER FOR CYLINDRICAL ROLLER BEARINGS AND CYLINDRICAL ROLLER BEARING

Pub. No.:    WO/2018/088515    International Application No.:    PCT/JP2017/040573
Publication Date: Fri May 18 01:59:59 CEST 2018 International Filing Date: Sat Nov 11 00:59:59 CET 2017
IPC: F16C 33/46
F16C 19/26
F16C 19/28
Applicants: NSK LTD.
日本精工株式会社
Inventors: SOGA Shuji
曽我 修二
Title: RESIN HOLDER FOR CYLINDRICAL ROLLER BEARINGS AND CYLINDRICAL ROLLER BEARING
Abstract:
A cylindrical roller bearing resin holder (14) wherein surfaces (19) on both sides in the circumferential direction of both end sections (17b) in the axial direction of a column (17), comprise both: a first flat surface (19a) that gradually decreases the length of the column (17) in the circumferential direction, from the outer peripheral surface towards the inner diameter side; and a second flat surface (19b) that gradually increases the length of the column (17) in the circumferential direction, from a connection section (19c) at which same connects to the first flat surface (19a), towards the inner diameter side. A pocket corner (20) between the column (17) and an annular section (16) comprises: a first curved surface (20a) connecting the first flat surface (19a) and the annular section (16) and having a first radius of curvature; and a second curved surface (20b) connecting the second flat surface (19b) and the annular section (16) and having a second radius of curvature greater than the first radius of curvature. In a state in which the center of revolution (C1) of a cylindrical roller (13) and the axis (C2) of the holder (14) match, the connection section (19c) between the first flat surface (19a) and the second flat surface (19b) and a connection section (20c) between the first curved surface (20a) and the second curved surface (20b) are positioned further on the inner diameter side than the pitch circle diameter (PCD) of the cylindrical roller (13).