Title:
FRICTION ROLLER TYPE REDUCTION GEAR
Document Type and Number:
Japanese Patent JP2017067236
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a friction roller type reduction gear which can prevent the generation of imbalance in surface pressure in a contact point between a sun roller, a ring roller and intermediate rollers without causing tilts in the intermediate rollers.SOLUTION: A friction roller type reduction gear comprises: a sun roller 15; a ring roller; a plurality of intermediate rollers 19; an oscillation holder 25; and a carrier 27. The oscillation holder 25 comprises: a pair of bearing holding parts 28 which are arranged at both end parts of a rotating shaft, and in which support holes for supporting the end parts of the rotating shaft are formed; and bridge parts 75A, 75A which connect the pair of the bearing holding parts 28 while straddling external peripheries of the intermediate rollers 19. The bearing holding part 28 has an oscillation shaft external peripheral face with a position which is decentered by a length not longer than a radii of the intermediate rollers 19 from the rotating shaft as an oscillation shaft center. The carrier 27 has a holder support part which rotatably supports the oscillation shaft external peripheral face. The bridge parts 75A, 75B are arranged in a pair with the rotating shaft sandwiched therebetween.SELECTED DRAWING: Figure 10
Inventors:
KAWAHARA HIROSHI
Application Number:
JP2015196032A
Publication Date:
April 06, 2017
Filing Date:
October 01, 2015
Export Citation:
Assignee:
NSK LTD
International Classes:
F16H13/04
Domestic Patent References:
| JP2013104545A | 2013-05-30 | |||
| JP2014196824A | 2014-10-16 | |||
| JPH0366959A | 1991-03-22 | |||
| JPH0226357A | 1990-01-29 | |||
| JPH0235249A | 1990-02-05 |
Attorney, Agent or Firm:
Patent business corporation glory patent office