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Patent Searching and Data


Title:
BALL BEARING
Document Type and Number:
WIPO Patent Application WO/2018/199016
Kind Code:
A1
Abstract:
The present invention prevents, when strain wave gearing is used, the occurrence of displacement of a ball bearing (1) that is interposed between a flexspline (3) and a cam (4), the displacement being caused by a thrust force acting on the ball bearing (1), and also prevents an inner ring (5) from being cracked due to interference between the inner ring (5) and the cam (4). The ball bearing (1) is configured such that, when the ellipse circumferential length of an outer periphery (4a) formed into an elliptical shape on the cam (4) is L1, and the circumferential length of an inner surface (5a) of the inner ring (5) is L2, the value of L1/L2 falls within the range from 1.0001 to 1.0007.

Inventors:
HAYASHI Yasuyoshi (3066 Aza Oyumida, Oaza Higashikata, Kuwana-sh, Mie 78, 〒5118678, JP)
Application Number:
JP2018/016445
Publication Date:
November 01, 2018
Filing Date:
April 23, 2018
Export Citation:
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Assignee:
NTN CORPORATION (3-17, Kyomachibori 1-chome Nishi-ku, Osaka-sh, Osaka 03, 〒5500003, JP)
International Classes:
F16C35/063; F16C19/06; F16C33/58; F16C43/08; F16H1/32
Foreign References:
JP2015209931A2015-11-24
JP2016121724A2016-07-07
JP2013249875A2013-12-12
JP2001304274A2001-10-31
Attorney, Agent or Firm:
KAMADA Naoya et al. (18-12, Nipponbashi 1-chome Chuo-ku, Osaka-sh, Osaka 73, 〒5420073, JP)
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