COOLING STRUCTURE FOR BEARING DEVICE - NTN TOYO BEARING CO LTD

Title:

COOLING STRUCTURE FOR BEARING DEVICE

Document Type and Number:

WIPO Patent Application WO/2019/073911

Kind Code:

A1

Abstract:

A bearing device (J) has: a plurality of rolling bearings (1, 1); and an outer ring spacer (4) and an inner ring spacer (5), which are arranged between the plurality of rolling bearings (1, 1). This cooling structure for the bearing device (J) is configured so that the outer ring spacer (4) has an annular recess (10) in the inner peripheral surface, and an air supply opening (11) for compressed air is open at the bottom surface of the recess (10). The outer, inner peripheral surfaces (16) of the outer ring spacer (4) have a cross-sectional shape which causes the inner diameter of the outer, inner peripheral surfaces (16) to increase toward the axially outer sides. Gas discharge openings (17) are formed in the axially outer ends of the outer, inner peripheral surfaces (16). The inner ring spacer (5) faces the outer ring spacer (4) with narrowed gaps (18) therebetween. The outer peripheral surface of the inner ring spacer (5) is configured so that the gap between the outer peripheral surface and the outer, inner peripheral surfaces (16) widens from the narrowed gaps (18) toward the axially outer sides. The outer diameter of axial ends of the inner ring spacer (5) is greater than that of axial ends of the inner rings (3) of the rolling bearing (1).

Inventors:

UEDA KEIICHI (JP)
NASU KEISUKE (JP)

Application Number:

PCT/JP2018/037307

Publication Date:

April 18, 2019

Filing Date:

October 05, 2018

Export Citation:

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Assignee:

NTN TOYO BEARING CO LTD (JP)

International Classes:

F16C37/00; F16C19/16

Foreign References:

JP2014062616A	2014-04-10
JP2015183739A	2015-10-22
JP2006125485A	2006-05-18
JPS628426U	1987-01-19
JP2015183738A	2015-10-22
JP2014062619A	2014-04-10

Other References: