公开(公告)号：US20180266518A1

公开(公告)日：2018-09-20

申请号：US15901928

申请日：2018-02-22

Applicant: DENSO CORPORATION

Inventor： Hiroaki OE ,  Takashi FURUKAWA ,  Yukihiro JO ,  Yukihiro HONDA

IPC: F16H1/32 ,  F16H57/08

CPC classification number: F16H1/32 ,  F01L1/02 ,  F01L1/022 ,  F01L1/04 ,  F01L1/352 ,  F16H35/008 ,  F16H57/08 ,  F16H2001/325

Abstract: A second rotor and a third rotor are accommodated in a first rotor. A fitting portion of the third rotor is located in an engagement hole of the second rotor to engage the third rotor with the second rotor. The third rotor is rotational about an axis, which is eccentric to an axis of the first rotor, to vary a relative rotational phase of the first rotor to the second rotor and to accelerate and decelerate rotation of the second rotor. When friction arises between the second rotor and the fitting portion, a frictional force acts in a direction to reduce a rotational moment acting on the third rotor. A friction coefficient between the second rotor and the fitting portion is greater than a friction coefficient between ferrous objects.