ROTARY DRIVING DEVICE

To provide a configuration capable of suppressing diameter enlargement caused by thermal expansion as further as possible regarding a configuration of a disc-shaped driven member which is mounted to a main shaft, in a rotary driving device comprising a drive transmission mechanism configured to dire...

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Bibliographic Details
Main Authors ISHIZAKI JUNICHIRO, NITTA TETSUYA
Format Patent
LanguageEnglish
Japanese
Published 03.06.2021
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Summary:To provide a configuration capable of suppressing diameter enlargement caused by thermal expansion as further as possible regarding a configuration of a disc-shaped driven member which is mounted to a main shaft, in a rotary driving device comprising a drive transmission mechanism configured to directly or indirectly engage a drive transmission member which is provided on a drive shaft, with the driven member.SOLUTION: A driven member is constituted of an inner ring which is mounted to a main shaft, and an outer ring which is mounted to the inner ring by shrink fitting, the outer ring including an engage groove formed so as to be opened on an outer peripheral surface. The inner ring is formed from a low thermal expansion member of an alloy of which the thermal expansion coefficient is equal to or less than 5×10-6/K, and the outer ring is formed from a quenchable iron-based material.SELECTED DRAWING: Figure 3 【課題】駆動軸上に設けられる駆動伝達部材と主軸に取り付けられる円盤状の被駆動部材とが直接的または間接的に係合するように構成された駆動伝達機構を備えた回転駆動装置において、その被駆動部材の構成について、熱膨張による拡径を可及的に抑制することができる構成を提供する。【解決手段】前記被駆動部材を、前記主軸に取り付けられるインナーリングと、該インナーリングに焼き嵌めによって取り付けられるアウターリングであって外周面に開口するように形成された係合用溝を有するアウターリングとで構成されたものとする。その上で、前記インナーリングを熱膨張係数が5×10−6/K以下の合金である低熱膨張部材で形成されたものとすると共に、前記アウターリングを焼入れ可能な鉄系材料で形成されたものとすることを特徴とする。【選択図】 図3
Bibliography:Application Number: JP20190213324