Invention Application
- Patent Title: FRICTION ROLLER-TYPE REDUCTION GEAR
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Application No.: US15562315Application Date: 2016-02-24
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Publication No.: US20180347675A1Publication Date: 2018-12-06
- Inventor: Hiroshi KAWAHARA , Hiroyasu YOSHIOKA , Tetsu TAKEHARA , Yuji SHIMOMURA
- Applicant: NSK LTD.
- Applicant Address: JP Tokyo
- Assignee: NSK LTD.
- Current Assignee: NSK LTD.
- Current Assignee Address: JP Tokyo
- Priority: JP2015-069846 20150330; JP2015-081887 20150413; JP2015-116760 20150609
- International Application: PCT/JP2016/055533 WO 20160224
- Main IPC: F16H13/08
- IPC: F16H13/08 ; F16H13/14

Abstract:
A friction roller-type reduction gear includes a sun roller arranged concentrically with an input shaft, a ring roller having a stationary ring roller element and a moveable ring roller element, a plurality of intermediate rollers configured to be in rolling contact with an outer peripheral surface of the sun roller and an inner peripheral surface of the ring roller, a coupling part configured to couple the ring roller and the output shaft, and a loading cam mechanism having a cam ring and configured to change a contact surface pressure of each rolling contact surface. The outer peripheral surface of the sun roller is a concave curved surface of which a shape of an outer edge in an axial cross-section is a single circular arc-shaped concave curve, and an outer peripheral surface of the intermediate roller is a convex curved surface of which a shape of an outer edge in an axial cross-section is a single circular arc-shaped convex curve.
Public/Granted literature
- US10359102B2 Friction roller-type reduction gear Public/Granted day:2019-07-23
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