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Patent Searching and Data


Title:
BEARING DEVICE, AND SPINDLE DEVICE FOR MACHINE TOOL
Document Type and Number:
WIPO Patent Application WO/2018/034245
Kind Code:
A1
Abstract:
Provided is a bearing device (1) wherein an outer ring (12) of an angular contact ball bearing (10) has at least one supply hole (15) for supplying a lubricating oil, and an outer ring spacer (30) comprises, on the inner peripheral surface thereof, a tapered surface (32) which increases in diameter with the distance from an axial end surface (31) contacting the outer ring (12), the outer ring spacer (30) also comprising a discharge hole (34) which passes therethrough in the radial direction and through which the lubricating oil is discharged. Further, the inner diameter dimension (D31) of the axial end surface (31) of the outer ring spacer (30) is set to be equal to or larger than the inner diameter dimension (D12e) of an axial other side end surface (12e) of the outer ring (12) contacting the outer ring spacer (30).

Inventors:
MATSUNAGA KYOHEI (JP)
KATSUNO YOSHIAKI (JP)
Application Number:
JP2017/029161
Publication Date:
February 22, 2018
Filing Date:
August 10, 2017
Export Citation:
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Assignee:
NSK LTD (JP)
International Classes:
F16C33/66; B23B19/02; F16C19/16; F16C19/54; F16N7/32; F16N31/00; B23Q11/12
Foreign References:
DE102006012001A12007-09-20
JP2009216243A2009-09-24
Other References:
See also references of EP 3499065A4
Attorney, Agent or Firm:
EIKOH PATENT FIRM, P.C. (JP)
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