FRICTION ROLLER TYPE REDUCTION GEAR

Title:

FRICTION ROLLER TYPE REDUCTION GEAR

Document Type and Number:

WIPO Patent Application WO/2016/158106

Kind Code:

A1

Abstract:

A friction roller type reduction gear is provided with: a sun roller disposed coaxially with an input shaft; a ring roller having a stationary ring roller element and a movable ring roller element; a plurality of intermediate rollers in rolling contact with the outer peripheral surface of the sun roller and with the inner peripheral surface of the ring roller; a connection section for connecting the ring roller and an output shaft; and a loading cam mechanism having a cam ring and changing the contact surface pressure of each rolling contact surface. The outer peripheral surface of the sun roller is a concave surface, and the shape of the outer edge of the outer peripheral surface in an axial cross-section is a single circular arc-shaped concave curve. The outer peripheral surface of each of the intermediate rollers is a convex surface, and the shape of the outer edge of the outer peripheral surface in an axial cross-section is a single circular arc-shaped convex curve.

Inventors:

KAWAHARA HIROSHI (JP)
YOSHIOKA HIROYASU (JP)
TAKEHARA TETSU (JP)
SHIMOMURA YUJI (JP)

Application Number:

PCT/JP2016/055533

Publication Date:

October 06, 2016

Filing Date:

February 24, 2016

Export Citation:

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Assignee:

NSK LTD (JP)

International Classes:

F16H13/04

Domestic Patent References:

WO2013174740A1

2013-11-28

Foreign References:

JP2014196825A	2014-10-16
JP2014040892A	2014-03-06
JPH01229155A	1989-09-12
JPS5292068A	1977-08-03

Other References: