Title:
REDUCTION GEAR
Document Type and Number:
WIPO Patent Application WO/2020/110849
Kind Code:
A1
Abstract:
[Problem] To enable rotation to be achieved without providing a separate eccentric motion absorption mechanism. [Solution] A reduction gear 1 has: an eccentric cam 4 that turns together with a drive shaft 3; a swinging body 7 caused to swing by the eccentric cam 4; a plurality of round-bar-shaped pins 12 in contact with an outer peripheral surface 20 of the swinging body 7; a first pin-guiding member 2 in which diametrical grooves 27 are formed through which the pins 12 slidably move along the diametrical direction, the number of said grooves being at least the same as the number (Za) of pins 12; a second pin-guiding member 11 in which a wave-form recessed part 40 is formed along the circumferential direction, said recessed part comprising a plurality of (Zb) recesses 38 in contact with the pins 12 slidably moving along the diametrical grooves 27; and a holding ring 13 that elastically presses the plurality of pins 12 against the outer peripheral surface 20 of the swinging body 7. The second pin-guiding member is secured to a secured-to member, and the first pin-guiding member is arranged to be capable of turning in relation to the second pin-guiding member and the swinging body. The difference between Za and Zb is 1, and the rotation ratio of the first pin-guiding member to the drive shaft 1/Za.
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Inventors:
KAJIWARA YASUSHI (JP)
Application Number:
PCT/JP2019/045366
Publication Date:
June 04, 2020
Filing Date:
November 20, 2019
Export Citation:
Assignee:
ENPLAS CORP (JP)
International Classes:
F16H1/32
Foreign References:
| JPS58102847A | 1983-06-18 | |||
| US4023440A | 1977-05-17 |
Attorney, Agent or Firm:
OHNUKI & KOTAKE (JP)
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