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Title:
ELECTRIC LINEAR MOTION ACTUATOR AND ELECTRIC BRAKE DEVICE
Document Type and Number:
Japanese Patent JP2010265985
Kind Code:
A
Abstract:

To avoid locally excessive contact bearing pressure on a rotating shaft even in the case that a planetary roller is inclined with the operating force of the spiral protruded strip of an outer ring member when an output member linearly drives a driven object against a load.

A carrier 7 as an output member has linear motion while restricting the axial movement of an outer ring member 5. On the outer diameter face of the planetary roller 6 at the front side in the direction that the carrier 7 as the output member linearly drives the driven object against a load, a crowning 6b is provided whose diameter is smaller at the shaft end side. Even in the case that the planetary roller 6 linearly driving the driven object together with the carrier 7 is inclined inward to the front side in the direction of linearly driving it with force F of the spiral protruded strip 5a of the outer ring member 5, locally excessive contact bearing pressure is thus avoided on the front end side of the planetary roller 6 rolling around the rotating shaft 4.

COPYRIGHT: (C)2011,JPO&INPIT


Inventors:
YAMAZAKI TATSUYA
EGUCHI MASAAKI
MAKINO TOMOAKI
Application Number:
JP2009117625A
Publication Date:
November 25, 2010
Filing Date:
May 14, 2009
Export Citation:
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Assignee:
NTN CORP
International Classes:
F16H25/20; F16D65/18; F16H13/08
Domestic Patent References:
JP2009041581A
JP2007051684A
JP2006105362A
JP2002520545A
JPH11141634A
Attorney, Agent or Firm:
鎌田 文二
東尾 正博
田川 孝由