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Patent Searching and Data


Title:
BALL SCREW DEVICE AND ELECTRIC ACTUATOR EQUIPPED WITH SAME
Document Type and Number:
WIPO Patent Application WO/2017/138353
Kind Code:
A1
Abstract:
A ball screw device 31 which is equipped with a ball screw shaft 33 and a ball screw nut 32 for rotatably engaging the outer periphery of the ball screw shaft 33 via a plurality of balls 34, and causes the ball screw shaft 33 to move linearly in the axial direction in response to the rotation of the ball screw nut 32, wherein: the ball screw shaft 33 is formed so as to be hollow and to have a hole 33b therein extending in the axial direction; and a stroke detection sensor 55 for detecting the amount of displacement of the ball screw shaft 33 in the axial direction is provided inside the hole 33b.

Inventors:
MATSUTOU TAKUSHI (JP)
IKEDA YOSHINORI (JP)
NAITOU YUUKI (JP)
Application Number:
JP2017/002479
Publication Date:
August 17, 2017
Filing Date:
January 25, 2017
Export Citation:
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Assignee:
NTN TOYO BEARING CO LTD (JP)
International Classes:
F16H25/22; F16H25/24; G01B7/00
Foreign References:
JP2004312880A2004-11-04
JPH11160010A1999-06-18
JP2014232034A2014-12-11
JP2005170064A2005-06-30
Other References:
See also references of EP 3415792A4
Attorney, Agent or Firm:
SHIROMURA Kunihiko et al. (JP)
Kunihiko Shiromura (JP)
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