Title:
TRANSMISSION
Document Type and Number:
Japanese Patent JP2019044936
Kind Code:
A
Abstract:
To provide a structure capable of improving backlash characteristics and suitable for downsizing in an eccentric oscillation type transmission.SOLUTION: An eccentric oscillation type transmission includes an eccentric body 20, an external gear 30 and an internal gear 40. The external gear is located radially outside of the eccentric body. The internal gear is arranged radially outside of the external gear and coaxially with a central axis 9. Part of a plurality of external teeth 31 of the external gear and part of a plurality of internal teeth 41 of the internal gear are engaged with each other on an extention line of a long diameter of the eccentric body 20. Also, between the eccentric body and the external gear, a bearing unit is interposed. The bearing unit includes a first bearing 71, a second bearing and a preload member. The first bearing and the second bearing are arranged side by side in the axial direction. The preload member is arranged between the first bearing and the second bearing. By this preload member, each internal gap of the first bearing and the second bearing can be reduced.SELECTED DRAWING: Figure 3
Inventors:
YAMANE MASARU
TAKAO MASASHI
MATSUDA SHIGEKATSU
FURUKAWA KEIZO
TAKEMOTO SHINJI
YOKOKAWA CHIKA
TSUBONE TAHEI
TAKAO MASASHI
MATSUDA SHIGEKATSU
FURUKAWA KEIZO
TAKEMOTO SHINJI
YOKOKAWA CHIKA
TSUBONE TAHEI
Application Number:
JP2017171649A
Publication Date:
March 22, 2019
Filing Date:
September 07, 2017
Export Citation:
Assignee:
NIHON DENSAN KK
NIDEC SHIMPO CORP
NIDEC SHIMPO CORP
International Classes:
F16C19/16; F16H1/32; F16C19/54; F16C25/08; F16C35/07
Domestic Patent References:
| JP2014005890A | 2014-01-16 | |||
| JPH0791449A | 1995-04-04 | |||
| JP2009281481A | 2009-12-03 | |||
| JPH0650347A | 1994-02-22 | |||
| JPS5683971U | 1981-07-06 | |||
| JP2013194883A | 2013-09-30 | |||
| JP2014129859A | 2014-07-10 |
Attorney, Agent or Firm:
Takami Nishida