| 摘要 |
PURPOSE:To easily increase a humping torque by taking the end of each hole which opens to an outer plate and inner plate on the approaching side as an angular part with the diameter thereof never enlarged. CONSTITUTION:The diameter enlarging parts 13t, 16t of respective holes 13, 16 on an inner plate 15 and outer plate 12 receive an axially pushing force due to the shear resistance of viscous fluid 19. A plate 12 movable by the pushing force approaches to the inner plate 15 side. The ends of respective holes 13, 16 opening to both plates 12, 15 on the approaching side are taken as angular parts 13e, 16e with the diameters thereof never enlarged. Since in the humping state, viscous fluid oil film tends to be sheared, the transmitting force applied between both plates 12, 15 is increased. Thus, it is possible to easily increase the humping torque. |
