公开(公告)号：US20020019281A1

公开(公告)日：2002-02-14

申请号：US09970510

申请日：2001-10-04

Applicant: NHK Spring Co., Ltd.

Inventor： Noritoshi Takamura ,  Tomokazu Kaibuki

IPC: F16H007/08 ,  F16H007/22

CPC classification number: F16H7/08 ,  F16H2007/081 ,  F16H2007/0891

Abstract: This tensioner comprises a casing, a first shaft member rotatably stored in the casing so as to be restrained from moving in its axial direction, a second shaft member in screwed engagement with the first shaft member, and a spring for applying a turning force to the first shaft member. The second shaft member is restrained from rotating relatively to the casing and allowed to move in the axial direction. An axial load from a force transmitting member, such as a chain or belt, acts on the first shaft member. An end face of the first shaft member touches a receiving surface of the casing across a washer. The end face receives the axial load that acts on the second shaft member. The flatness of at least the end face of the first shaft member is adjusted to 15 nullm or less.