Title:
SPINDLE DEVICE
Document Type and Number:
WIPO Patent Application WO/2023/073796
Kind Code:
A1
Abstract:
This spindle device comprises: a spindle-mounting body; a first rolling element bearing that is lubricated using grease; a spindle that is rotatably supported on the spindle-mounting body via the first rolling element bearing; a rotation-driving motor that causes the spindle to rotate; a spiral-shaped first cooling flow path formed as a groove in the outer peripheral surface of the spindle, the first cooling flow path being formed in at least a first region where the first rolling element bearing is positioned in the axial direction of the spindle, and being covered by the first rolling element bearing in the first region; and a first supply flow path that supplies, to the first cooling flow path, cooling gas for cooling the first rolling element bearing. The first supply flow path has a first radial-direction flow path formed spanning the spindle-mounting body and the spindle in the radial direction. Among first gaps, a pair of first axial-direction gaps located on either side of the first radial-direction flow path in the axial direction function as first apertures for reducing leakage of the cooling gas from the first radial-direction flow path.
Inventors:
ICHIKAWA MASAKI (JP)
FURUHATA TETSURO (JP)
TOYAMA KOUJI (JP)
FURUHATA TETSURO (JP)
TOYAMA KOUJI (JP)
Application Number:
PCT/JP2021/039415
Publication Date:
May 04, 2023
Filing Date:
October 26, 2021
Export Citation:
Assignee:
JTEKT CORP (JP)
International Classes:
B23Q11/12; F16C37/00
Domestic Patent References:
| WO2018179280A1 | 2018-10-04 |
Foreign References:
| JPH0631585A | 1994-02-08 | |||
| JP2004250832A | 2004-09-09 | |||
| JPH09317778A | 1997-12-09 | |||
| JP2003145393A | 2003-05-20 | |||
| JP2000015541A | 2000-01-18 | |||
| EP2952293A1 | 2015-12-09 |
Attorney, Agent or Firm:
BENRISHIHOJIN MEISEI INTERNATIONAL PATENT FIRM (JP)
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