| 摘要 |
995,976. Slip couplings. G. PULS. Aug. 22, 1963 [Aug. 22, 1962], No. 33242/63. Headings F2C and F2U. A vibrating damping slip coupling or clutch has the torque transmission differing according to the relative position of clutch parts and the direction of relative rotation, and comprises annular clutch plates slidably splined to a driven sleeve 15 and frictionally engaging sets of members 11 which are pivotally mounted about pins 7 peripherally spaced around the coupling, the pivot pins being carried by the driving casing of the coupling. The members 11 can pivot between stops 21 provided on the casing, the different torque transmission when the direction of relative rotation reverses giving excellent damping of torsional vibrations. In order to damp small torsional oscillations to which the friction clutch does not respond, an elastomeric coupling may be provided comprising a sleeve 20 of elastomeric material vulcanized to the sleeve 15 and to a sleeve 17 operatively connected to an output shaft 18. The stops 21 for the members 11 and the pivot pin 7 may be resilient and may be formed similarly, the stops, for example, being formed by a bolt 22 surrounded by an elastomeric element 23 which is encased in a sleeve 21. In a modification the stops 21 are replaced by radially directed flexible stops which are secured at their radially outer ends to the driving casing, the inner ends co-operating with the members 11. In the modification shown in Fig. 7 the members 11 are biased to their central position by centrifugal weights 28 which are connected circumferentially by links 29 disposed alternately at the front and rear, the links 29 having slots 30 to allow the members 11 to pivot freely. As shown, the members 11 do not themselves frictionally engage the driving plates, but are provided with friction discs 32 which are rotatably mounted in apertures 31 in the members 11. |
