| 摘要 |
<p>Provided is a rotation device provided with a seal structure which can prevent an annular rubber member from wearing or peeling without requiring a rotation stopping structure. A seal member (120) is configured so that an annular rubber member (120b) is disposed in an annular storage chamber (120c) of an annular resin member (120a). Thus, the annular rubber member is not directly in contact with a drive shaft (54), and the annular rubber member can be prevented from wearing or peeling without requiring a rotation stopping structure for the seal member. Furthermore, the seal member is provided with first and second communication ports (120e, 120f), so that a braking fluid pressure is applied to compartments (120k, 120m) obtained by dividing the annular storage chamber using the annular rubber member. Thus, the annular rubber member is pressed, and then is elastically deformed, and accordingly, the annular resin member is expanded by the elastic force. Thus, a self-sealing operation can be performed on the basis of a high pressing force.</p> |
