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Patent Searching and Data


Title:
FRICTION ROLLER TYPE REDUCTION GEAR
Document Type and Number:
Japanese Patent JP2016008675
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a friction roller type reduction gear which can reduce a differential slide in a contact ellipse between an annular roller and an intermediate roller.SOLUTION: A friction roller type reduction gear 100 comprises: a sun roller 15 coaxially arranged at an input shaft; an annular roller 17 coaxially arranged at an external peripheral side of the sun roller 15; and a plurality of intermediate rollers 19 which are supported to a rotating shaft 37 parallel with the input shaft, and rollingly contact with a sun roller external peripheral face 27 and an annular roller internal peripheral face 33. The sun roller 15 is composed of a pair of sun roller elements in an axial direction, and has element external peripheral faces 29 whose outside diameters become small as progressing toward an opposing inside end face 31. The annular roller internal peripheral face 33 has a single arc-shaped recessed internal peripheral face 35. The intermediate roller 19 has a single arc-shaped protruded external peripheral face 39, and rollingly contacts at three points of contact points with the element external peripheral faces 29 of the pair of the sun roller elements, and a contact point with the recessed internal peripheral face 35 of the annular roller 17.

Inventors:
IHARA HIROTAKA
YOSHIOKA HIROYASU
TANAKA ICHIU
Application Number:
JP2014129962A
Publication Date:
January 18, 2016
Filing Date:
June 25, 2014
Export Citation:
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Assignee:
NSK LTD
International Classes:
F16H13/08
Attorney, Agent or Firm:
特許業務法人栄光特許事務所
濱田 百合子
北島 健次
本多 弘徳