| 摘要 |
The coupling comprises two coaxial, relatively rotary members. Between the central member and the sleeve member is a shoe, to fix one member rigidly to the other in one rotary direction. The shoe is slidable over a surface of revolution of the sleeve coaxial to the coupling and a rotary skid is inserted between the shoe and the central member and slidable over a flat surface, belonging either to the shoe or to said member, or to a part fast to one of these two elements. The axis of rotation of the skid is suitably displaced with respect to the axial plane normal to said flat surface. A spring cooperates with the central member and the shoe, urging the sliding surfaces to maintain contact. The shoe may be a bar supported at its two ends by two contact zones on the cylindrical sliding surface of the sleeve. |
