| 摘要 |
<p>A twisting spindle, such as a two-for-one twisting spindle, has a spindle rotor and a spool carrier with a hollow hub mounted on the spindle rotor. A yarn brake positioned within the hollow hub has a brake cartridge positioned vertically in the cylindrical housing. It includes two brake rings positioned at opposite ends of the brake cartridge. A first brake ring is axially displaceable for adjusting a braking force. The yarn brake includes an adjusting sleeve axially displaceable and rotationally fixed in the cylindrical housing. The lower end of the adjusting sleeve has a threaded portion extending axially into the area beneath the spool carrier. A transmission member including a radial actuating arm threaded onto the threaded portion of the adjusting sleeve so as to be rotatable but axially fixed. The actuating arm has a first permanent magnet located at a radially outer end of the actuating arm and positioned within an area delimited by the yarn balloon closely adjacent thereto. A second permanent magnet is positioned external to the area delimited by the yarn balloon directly opposite the first permanent magnet. The facing sides of the two permanent magnets have opposite polarity. The second permanent magnet is rotatable about the central axis along a circular arc with a guide system. A centrally controlled mechanical actuator for displacing the second permanent magnet along the circular arc for a predetermined angular distance is provided.</p> |
