| 摘要 |
The invention relates to a chuck of a winding machine for receiving and securing winding tubes (32). The winding tubes are held by a clamping device (5) on the periphery of a tensioning bush (1), wherein the clamping device (5) is released using a compressed air supply. In this process, the compressed air is supplied via a ring chamber (14) formed between the tensioning bush (1) and a shaft carrier (2), which ring chamber can be deaerated at an open end of the tensioning bush (1) via a cover opening (18) formed between the shaft carrier (2) and the tensioning bush (1). A sealing piston (21) is associated with the cover opening (18), which sealing piston is moveably formed on the shaft carrier (2), and which sealing piston interacts with a seal (22) on a sealing surface (20) of the tensioning bush (1). According to the invention, in order to compensate in particular shifts in position between the tensioning bush (1) and the shaft carrier (2), the sealing piston (21) has a centring attachment (23) on an end side facing the end of the tensioning bush (1), which centring attachment projects into the tensioning bush (1) when coming into contact with the sealing surface (20). |
