Title:
BALL BEARING
Document Type and Number:
WIPO Patent Application WO/2024/058105
Kind Code:
A1
Abstract:
Provided is a ball bearing that has excellent low torque performance without using a holder with a special shape. This ball bearing comprises an inner race 2 having an inner race track groove on the outer circumference thereof, an outer race 3 having an outer race track groove on the inner circumference thereof, balls 4 interposed between the inner race track groove and the outer race track groove, and a holder 5 that holds the balls 4. The number Z of the balls 4 satisfies the condition of formula (1) below. (1): Z ≤ ((π × Dp)/2Da)
where Z is the number of the balls 4 (Z is an integer of three or more), Dp is the pitch diameter of the balls 4 [unit: mm], and Da is the diameter of the balls 4 [unit: mm].
Inventors:
WAKUDA TAKAHIRO (JP)
MUNEYOSHI MASAKI (JP)
SAKAI KOHEI (JP)
HATA KOYOMI (JP)
MUNEYOSHI MASAKI (JP)
SAKAI KOHEI (JP)
HATA KOYOMI (JP)
Application Number:
PCT/JP2023/033002
Publication Date:
March 21, 2024
Filing Date:
September 11, 2023
Export Citation:
Assignee:
NTN TOYO BEARING CO LTD (JP)
International Classes:
F16C19/06; F16C33/32; F16C33/58; F16C33/66; F16C33/78; F16J15/3204; F16J15/324
Domestic Patent References:
| WO2014097927A1 | 2014-06-26 | |||
| WO2014045707A1 | 2014-03-27 |
Foreign References:
| JP2012163209A | 2012-08-30 | |||
| JP2017161069A | 2017-09-14 | |||
| JP2000145794A | 2000-05-26 | |||
| JPH07238938A | 1995-09-12 | |||
| JP2002339958A | 2002-11-27 | |||
| JP2013015180A | 2013-01-24 |
Attorney, Agent or Firm:
WAKI Hikaru et al. (JP)
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