Title:
SPINDLE DEVICE HAVING BUILT-IN MOTOR
Document Type and Number:
WIPO Patent Application WO/2020/090276
Kind Code:
A1
Abstract:
A spindle device (10) having a built-in motor, wherein a flinger (40) is fixed to one end side of a rotating shaft (11) and a labyrinth seal (44) is formed between the flinger (40) and a housing H. The housing H comprises at least one bypass hole (24) that connects the labyrinth seal (44) and a motor chamber (34) having a motor (30) arranged therein. As a result, water-resistance performance can be improved and damage to bearings can be suppressed.
Inventors:
MATSUNAGA KYOHEI (JP)
OGURI SHOICHIRO (JP)
OGURI SHOICHIRO (JP)
Application Number:
PCT/JP2019/036847
Publication Date:
May 07, 2020
Filing Date:
September 19, 2019
Export Citation:
Assignee:
NSK LTD (JP)
International Classes:
B23B19/02; B23Q11/00; B24B41/04; F16C33/80; H02K5/20
Domestic Patent References:
| WO2015068750A1 | 2015-05-14 | |||
| WO2013100099A1 | 2013-07-04 |
Foreign References:
| JP2015223022A | 2015-12-10 | |||
| JP2018157715A | 2018-10-04 | |||
| JP2016026900A | 2016-02-18 | |||
| JP2018205650A | 2018-12-27 |
Other References:
See also references of EP 3875190A4
Attorney, Agent or Firm:
EIKOH PATENT FIRM, P.C. (JP)
Download PDF:
Previous Patent: INFORMATION PROCESSING DEVICE AND INFORMATION REWRITE DEVICE
Next Patent: SPINDLE DEVICE HAVING BUILT-IN MOTOR
Next Patent: SPINDLE DEVICE HAVING BUILT-IN MOTOR