| 摘要 |
An expandable pulley (100). The expandable pulley (100) comprises a pluralit y of belt blocks (10) arranged about an axis of rotation (A). Each belt block (10) bears upon a radial surface extending normally to the axis of rotation. Another surface of each belt block (10) bears upon a conical member (16) surface which is moveable coaxially with the axis of rotation. A spring (22) bears upon the conical member (16) which urges the conical member (16) in an axial direction, which in turn urges the belt blocks (10) radially outward t o compensate for a belt length change and to maintain a belt tension. An elast ic member (24) holds the belt blocks (10) in contact with the conical member (1 6).
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