| 摘要 |
Collapsible tire building drum mountable on a tire building machine spindle without necessity of internal connections, which drum has a plurality of major and a plurality of minor drum surface support sections and a plurality of articulated links pivotally connected at their respective outer ends to the sections and at their respective inner ends to spiders fixed on a central tubular shaft member and with individual air cylinders operable to move, in an axial plane, the respective hinges of the articulated links to collapse and to expand the drum. The drum features also an air cylinder control means mounted on the central member for corotation therewith and which means is provided with a connectable/disconnectable terminal means in the form of a self-closing hose connector unit enabling the drum to be expanded or collapsed by temporary manual connection to an external supply of compressed air. |
