DAMPER PULLEY

PROBLEM TO BE SOLVED: To provide a damper pulley capable of restraining foreign matters intruding from a seal point with which a seal member comes in contact from reaching a bearing.SOLUTION: A damper pulley 10 comprises: an outside rotating body 30 having an annular pulley part 31 around which an e...

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Bibliographic Details
Main Author KOJIMA HIDEO
Format Patent
LanguageEnglish
Japanese
Published 14.09.2017
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Summary:PROBLEM TO BE SOLVED: To provide a damper pulley capable of restraining foreign matters intruding from a seal point with which a seal member comes in contact from reaching a bearing.SOLUTION: A damper pulley 10 comprises: an outside rotating body 30 having an annular pulley part 31 around which an endless belt is wound; and an inside rotating body 20 having a cylindrical part 23 housed in the inside of the pulley part 31 in a radial direction, attached to a rotating shaft, and rotating together with the rotating shaft. A bearing 50 is arranged between an inner peripheral face 31d of the pulley part 31 and an outer peripheral face 23u of the cylindrical part 23. An extension part 25 which is adjacent to the cylindrical part 23 in an extension direction of a rotation center of the rotating shaft, and does not overlap with the pulley part 31 in the radial direction is arranged at the inside rotating body 20. A seal member 60 is fixed to a side face 31a of the pulley part 31 in an axial direction. A lip part 61 of the seal member 60 comes into contact with a position separated from the cylindrical part 23 in the extension part 25.SELECTED DRAWING: Figure 1 【課題】シール部材が接触しているシール箇所から侵入した異物がベアリングに到達することを抑制することができるダンパプーリを提供する。【解決手段】ダンパプーリ10は、無端ベルトが巻き掛けられる環状のプーリ部31を有する外側回転体30と、プーリ部31の径方向内側に収容される円筒部23を有し、回転軸に取り付けられて回転軸とともに回転する内側回転体20と、を備えている。プーリ部31の内周面31dと円筒部23の外周面23uとの間にはベアリング50が配設されている。内側回転体20には、回転軸の回転中心の延伸方向において円筒部23と隣接し、径方向においてプーリ部31と重ならない延出部25が設けられている。プーリ部31の軸方向における側面31aにはシール部材60が固定されている。シール部材60のリップ部61は、延出部25における円筒部23から離間した位置に接触している。【選択図】図1
Bibliography:Application Number: JP20160048535