Title:
REDUCTION DEVICE
Document Type and Number:
WIPO Patent Application WO/2012/033043
Kind Code:
A1
Abstract:
A reduction device configured in such a manner that roller guiding bearings which are pressure-fitted on the eccentric circular plates of the input shaft is stably installed to suppress a reduction in the efficiency due to the coming out of the bearings. An input shaft (7) is disposed so as to be coaxial with a stationary internal gear (3), two eccentric circular plates (9) which can rotate within the internal gear (3) are provided to the input shaft (7), and roller guiding bearings (11) are pressure-fitted on the respective outer diameter surfaces of the eccentric circular plates (9). A cage (15) which can rotate between the internal gear (3) and the eccentric circular plates (9) is provided to a shaft end section of the output shaft (12) which is disposed coaxially with the input shaft (7). Roller containing pockets (18), the number of which is less than the number of the internal teeth (4) of the internal gear (3), are formed in the cage (15). Rollers (19) are individually received within the roller containing pockets (18). The rotation of the eccentric circular plates (9) which rotate together with the input shaft (7) sequentially engages the rollers (19) with the internal teeth (4). One rotation of the input shaft (7) moves the rollers (19) in the circumferential direction by a distance corresponding to a tooth of the internal teeth (4) to rotate the output shaft (12) at a reduced speed. A circular protrusion (21) is provided between the two eccentric circular plates (9), and staking protrusions (22) are provided at axially opposing ends of the eccentric circular plates (9). The staking protrusions (22) and the annular protrusion (21) prevent the bearing (11) from moving in the axial direction.
Inventors:
SATO KOJI (JP)
AKIYOSHI KOJI (JP)
NAKAKOJI MASAFUMI (JP)
SAITO TAKAHIDE (JP)
UTSUNOMIYA SATOSHI (JP)
AKIYOSHI KOJI (JP)
NAKAKOJI MASAFUMI (JP)
SAITO TAKAHIDE (JP)
UTSUNOMIYA SATOSHI (JP)
Application Number:
PCT/JP2011/070141
Publication Date:
March 15, 2012
Filing Date:
September 05, 2011
Export Citation:
Assignee:
NTN TOYO BEARING CO LTD (JP)
SATO KOJI (JP)
AKIYOSHI KOJI (JP)
NAKAKOJI MASAFUMI (JP)
SAITO TAKAHIDE (JP)
UTSUNOMIYA SATOSHI (JP)
SATO KOJI (JP)
AKIYOSHI KOJI (JP)
NAKAKOJI MASAFUMI (JP)
SAITO TAKAHIDE (JP)
UTSUNOMIYA SATOSHI (JP)
International Classes:
F16H1/32; F16C19/06; F16C33/38; F16C33/44; F16C33/46; F16C33/66; F16C35/06
Foreign References:
| JP2010038362A | 2010-02-18 | |||
| JPH0225756U | 1990-02-20 | |||
| JPH02118232A | 1990-05-02 | |||
| JP2009079654A | 2009-04-16 | |||
| JP2008115954A | 2008-05-22 | |||
| JP2007040383A | 2007-02-15 | |||
| JP2009185978A | 2009-08-20 | |||
| JPS6293565A | 1987-04-30 | |||
| JP2009115128A | 2009-05-28 | |||
| JP2004132473A | 2004-04-30 | |||
| JPS3525709Y1 | ||||
| JP2004340330A | 2004-12-02 | |||
| JPH116011A | 1999-01-12 | |||
| JP2008304020A | 2008-12-18 | |||
| JPH0236623U | 1990-03-09 | |||
| JPS6293565A | 1987-04-30 | |||
| JP2009115128A | 2009-05-28 |
Other References:
See also references of EP 2615328A4
Attorney, Agent or Firm:
KAMADA Bunji et al. (JP)
Bunji Kamata (JP)
Bunji Kamata (JP)
Download PDF:
Claims: