Title:
SPINDLE DEVICE HAVING BUILT-IN MOTOR
Document Type and Number:
WIPO Patent Application WO/2020/090277
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 has: at least one air purge hole (72) that connects to outside the spindle device (10); and an annular groove (71) into which the air purge hole (72) opens and which faces the labyrinth seal (44). As a result, water-resistance performance can be improved, high-temperature air from heat generated by the motor can be prevented from passing through front bearings, and premature damage to bearings can be prevented.
Inventors:
MATSUNAGA KYOHEI (JP)
OGURI SHOICHIRO (JP)
OGURI SHOICHIRO (JP)
Application Number:
PCT/JP2019/036849
Publication Date:
May 07, 2020
Filing Date:
September 19, 2019
Export Citation:
Assignee:
NSK LTD (JP)
International Classes:
B23B19/02; B23Q11/00; B24B41/04; B24B47/12; B24B55/06; F16C33/80; H02K5/10
Domestic Patent References:
| WO2013100099A1 | 2013-07-04 | |||
| WO2015068750A1 | 2015-05-14 |
Foreign References:
| JP2014046408A | 2014-03-17 | |||
| JP2016010204A | 2016-01-18 | |||
| JP2015223022A | 2015-12-10 | |||
| JP2018157715A | 2018-10-04 | |||
| JP2019097246A | 2019-06-20 | |||
| JP2007210091A | 2007-08-23 |
Attorney, Agent or Firm:
EIKOH PATENT FIRM, P.C. (JP)
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