| 摘要 |
<p>The drive system consists of an electric motor (2) which is mounted in a housing (1). The motor drives a pin (6) with threaded end via a coupling (4, 5). The threaded end of the pin can slide over the two pins (5) of the coupling. While the pin with threaded end is driven round, it can at the same time move to and fro in a sleeve (7) which has internal thread. Limit switches (8, 9) are mounted in the sleeve to limit the travel of the pin. The pin moves to and fro between these switches. A cup-shaped part (15) is mounted at the end of the pin. This cup rotates and moves to and fro with the pin. The cup-shaped part carries a ring on which the saw thread is wound. The ring has a threaded groove in the bottom of which the saw thread lies.</p> |
