Title:
ELECTRICALLY OPERATED LINEAR ACTUATOR AND ELECTRICALLY OPERATED DISC BRAKE DEVICE
Document Type and Number:
WIPO Patent Application WO/2011/040217
Kind Code:
A1
Abstract:
An electrically operated linear actuator is configured in such a manner that an external thrust load is uniformly applied to each planetary roller which revolves and at the same time rotates by causing the circumferential groove thereof to engage with the helical ridge of an outer ring member. The distances from a bearing support surface (6b) of each planetary roller (6) which is supported by a thrust bearing (18) to a predetermined reference position of the circumferential groove (6a) of the planetary roller (6) is set to be different from each other so that, when the helical ridge (5a) of an outer member (5) fits into the circumferential grooves (6a) of the planetary rollers (6), the axial positions of the bearing support surfaces (6b) of the planetary rollers (6) coincide with each other. As a result of the configuration, a thrust load from the outside acts uniformly on each planetary roller(6) which revolves and at the same time rotates by causing the circumferential groove (6a) thereof to engage with the helical ridge (5a) of an outer ring member (5).
Inventors:
YAMASAKI TATSUYA (JP)
EGUCHI MASAAKI (JP)
EGUCHI MASAAKI (JP)
Application Number:
PCT/JP2010/065728
Publication Date:
April 07, 2011
Filing Date:
September 13, 2010
Export Citation:
Assignee:
NTN TOYO BEARING CO LTD (JP)
YAMASAKI TATSUYA (JP)
EGUCHI MASAAKI (JP)
YAMASAKI TATSUYA (JP)
EGUCHI MASAAKI (JP)
International Classes:
F16H25/20; F16D65/18; F16H19/02; F16H25/24
Foreign References:
| JP2007127205A | 2007-05-24 | |||
| JP2002520545A | 2002-07-09 | |||
| JP2007120658A | 2007-05-17 |
Other References:
See also references of EP 2484935A4
Attorney, Agent or Firm:
KAMADA Bunji et al. (JP)
Bunji Kamata (JP)
Bunji Kamata (JP)
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