| 摘要 |
<p>A driveshaft, which is in driven connection with a motor or a geared motor, has a coupling device for holding rotationally symmetrical tools provided with a shank, for example milling, polishing or grinding tool heads. In order that such a driveshaft permits simple handling of the tool heads, particularly for machining small workpieces and for use in the field of beauty care, and which permits simple connection of the tools to the coupling device and their rapid replacement, the driveshaft (1) consists of a flexible steel wire with a circular cross-section or of a flexible wire with a plurality of layers enclosing it concentrically, which layers consist of wire wound around this wire, which driveshaft is guided in a plastic hose (2) or helically wound steel wire with windings (3) which are located essentially packed closely together. On the side opposite to the motor, a housing (6) in the shape of a tubular piece is connected to the helically wound hose (2), a cylindrical coupling piece (7) being supported rotatably in the housing (6). A permanent magnet (12) is held in the coupling piece (7), whose rear end is centrally connected fixedly to the front end of the driveshaft (1). In its front end face, the coupling piece (7) has a central, axially running hole (17) with a quadrilateral or polygonal cross-section, into which the cylindrical tool shank (24) can be pushed through a front opening of the housing (6), which tool shank (24) has an end part (26) with a cross-section corresponding to the cross-section of the hole (17) and with a flat end face (28), which in the coupled state rests, in the abutting manner on a flat pole face (29) of the magnet (12) which forms the base of the hole (17). …<IMAGE>… </p> |
