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Title:
FLUID DYNAMIC BEARING DEVICE AND MOTOR EQUIPPED WITH SAME
Document Type and Number:
WIPO Patent Application WO/2019/139007
Kind Code:
A1
Abstract:
A fluid dynamic bearing device 1 is provided with a bottomed tubular housing 7, a bearing sleeve 8 placed on the inner periphery of the housing 7, and a shaft member 2 having a shaft part 2a removably inserted through the inner periphery of the bearing sleeve 8. Part of the internal space of the housing 7 is filled with lubrication oil L, the rest of the internal space is a gap part not filled with the lubrication oil L, one axial end surface 8c of the bearing sleeve 8 constituting an open side of the housing 7 is open into the atmosphere, and between an internal circumferential surface 8a and the one axial end surface 8c of the bearing sleeve 8 is provided an inclined surface part 11 forming an oil buffer space 12 with an external circumferential surface 2a1 of the shaft part 2a.

Inventors:
KOMATSUBARA Shinji (3066 Aza Oyumida, Oaza Higashikata, Kuwana-sh, Mie 78, 〒5118678, JP)
Application Number:
JP2019/000242
Publication Date:
July 18, 2019
Filing Date:
January 08, 2019
Export Citation:
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Assignee:
NTN CORPORATION (3-17, Kyomachibori 1-chome Nishi-ku, Osaka-sh, Osaka 03, 〒5500003, JP)
International Classes:
F16C33/10; F16C17/10; F16C35/02
Foreign References:
JP2009228873A2009-10-08
JP2011021649A2011-02-03
JP2011033103A2011-02-17
JP2001065554A2001-03-16
JP2007091860A2007-04-12
Attorney, Agent or Firm:
SHIROMURA Kunihiko et al. (Ehara Patent Office, 2-15 Bakurou-machi 4-chome, Chuo-ku, Osaka-sh, Osaka 59, 〒5410059, JP)
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