公开(公告)号：US6390255B2

公开(公告)日：2002-05-21

申请号：US90727701

申请日：2001-07-17

Applicant: TOK BEARING CO LTD

Inventor： KOBORI TAKEAKI ,  SASA HIROZUMI

IPC: F16F9/14 ,  F16F9/516 ,  E05F3/14

CPC classification number: F16F9/145 ,  B60G2202/22 ,  E05Y2201/21 ,  E05Y2201/256 ,  E05Y2201/266 ,  E05Y2900/531

Abstract: To provide a rotary damper in which a viscous fluid does not leak from between an inner end face of a land and an outer circumferential surface of a rotatable member, and a decrease in torque caused by an eccentric rotation of the rotating member is prevented. The rotary damper has a rotatable member being relatively rotatable with respect to a casing, the proximal portion of the rotatable member being accommodated in a chamber of the case; a ridge member extending axially along and projecting radially outwardly from an outer circumferential surface of the proximal portion of the rotatable member, the ridge member having a radially outer end face disposed for sliding contact with an inner circumferential surface of the chamber; and the land extending axially along and projecting inwardly from the inner circumferential surface of the chamber, the land having a face transverse with respect to the rotational direction of the rotatable member. The ridge member and the land divide an interior of the chamber into a compression compartment and a decompression compartment, the volume of these compartments being variable complementarily to each other in response to the relative rotation of the rotatable member and the casing. A spacer is interposed between the land and the proximal portion of the rotatable member and adapted to be pressed against the outer circumferential surface of the proximal portion and the transverse face of the land by the pressure built up in the compression compartment in response to rotation of the rotatable member.

Abstract translation: 为了提供一种旋转阻尼器，其中粘性流体不会从平台的内端面和可旋转构件的外周面之间泄漏，并且防止由旋转构件的偏心旋转引起的扭矩的降低。 旋转阻尼器具有相对于壳体相对旋转的可旋转构件，可旋转构件的近侧部分容纳在壳体的腔室中; 脊构件，其从所述可旋转构件的近侧部分的外周表面轴向延伸并径向向外突出，所述脊构件具有设置成与所述腔的内周表面滑动接触的径向外端面; 并且所述区域从所述室的内周表面轴向延伸并向内突出，所述平台具有相对于所述可旋转构件的旋转方向横向的面。 脊部构件和陆部将腔室的内部分成压缩室和减压室，这些隔间的体积响应于可旋转构件和壳体的相对旋转而彼此互补地变化。 间隔件插入在可旋转构件的陆部和近侧部分之间，并且适于通过响应于压缩室中的压力而压缩在基部的外周面和陆地的横向面上 可旋转构件。