Title:
電動式直動アクチュエータおよび電動式ブレーキ装置
Document Type and Number:
Japanese Patent JP6648322
Kind Code:
B2
Abstract:
To avoid that a linear motion of an outer ring member is hindered by diameter expansion caused by elastic deformation of the outer ring member.SOLUTION: An outer ring member 21 which is movable to an axial direction is assembled into a housing 20, and a planetary roller 49 is rotatably supported by a carrier 40 which is supported with a rotating shaft 34 rotationally driven by an electric motor on an axial core of the outer ring member 21 as a center. A circumferential groove 52 engaged with a spiral protrusion 51 which is formed at an inside diameter face of the outer ring member 21 is formed at an outside diameter face of the planetary roller 49, and the outer ring member 21 is linearly moved to an axial direction by rotating and revolving the planetary roller 49. A slide guide clearance of a region corresponding to at least the planetary roller 49 is increased within a range of an axial length of the slide guide clearance which is formed between an inside diameter face of a cylinder chamber 20a and an outside diameter face of the outer ring member 21, and when the outer ring member 21 is expanded in a diameter by elastic deformation as a clearance fit part, a diameter-expanded part is increased, the increase is absorbed by the clearance fit part, and a linear motion of the outer ring member 21 is prevented from being hindered.SELECTED DRAWING: Figure 2
Inventors:
Masaaki Eguchi
Tatsuya Yamasaki
Tatsuya Yamasaki
Application Number:
JP2019017791A
Publication Date:
February 14, 2020
Filing Date:
February 04, 2019
Export Citation:
Assignee:
ntn corporation
International Classes:
F16H25/20; B60T13/74; F16D65/18; F16H19/02
Domestic Patent References:
| JP2013160359A | ||||
| JP2002529668A |
Attorney, Agent or Firm:
Naoya Kamata
Bunji Kamada
Yaichiro Nakatani
Takashi Shimizu
Bunji Kamada
Yaichiro Nakatani
Takashi Shimizu