The author describes an automatic differential lock for cars, used by Volkswagen. This plate-type unit consists of a normal crown and pinion gear and two thrust rings with plate units placed between the rings and the differential housing. Each plate unit consists of six plates, three being connected to the housing and three to the crown wheels. The plates are pressed together at constant pressure; however, this minimum locking effect is not noticeable on A non-slippery surface. The two hexagonal pinion shafts are not in contact with the differential housing, but are located in recesses in the thrust rings which are connected to the housing by splines. The propeller shaft transmits the torque to the thrust rings, and the pinion shafts fixed between these transmit it to the crown wheels. The resistance of the crown wheels displaces the pinion shafts in the recesses, causing the plates to be pressed together. On normal cornering, the thrust is so small that the plates can easily slip while providing sufficient differential action. On slippery roads the thrust increases and causes the two half shafts to be connected; however, this connection is not rigid, since the locking action is given A maximum value. /TRRL/

  • Corporate Authors:

    Suenska Uppfinnare Foreningen

    Munkbron 7
    Stockholm,   Sweden 

    Svenska Uppfinnare Foreningen

    Munkbron 7
    Stockholm,   Sweden 
  • Authors:
    • Svedberg, B
  • Publication Date: 1974


  • Swedish

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00125542
  • Record Type: Publication
  • Source Agency: Swedish National Road and Traffic Research Institute
  • Files: ITRD, TRIS
  • Created Date: Apr 21 1976 12:00AM