| 摘要 |
PURPOSE:To transmit the max. torque by setting the position for installing an elastic member onto a trailing flange body at the position opposed to an arm, outside from an outer peripheral circle at the top edge of the arm of a driving flange body and using a large elastic member, thus damping the torsional vibration. CONSTITUTION:When a load does not act onto a coil spring 10, the center of a receiving hole 5 exists at the point P1, and the center of a receiving hole 15 exists at the point Q3, and when driving starts, the spring 10 is compressed, and the center of the receiving hole 5 shifts to the point P2 during the transmission of an average torque, while during the transmission of the max. torque, the spring 10 shifts to the point P3. The free length of the spring 10 is represented by l1, and during the transmission of the max. torque, the spring 10 contracts to the length l2, and the length of the connection between the points P1 and Q1 represents the length of a rod 19. Therefore, even if the spring 10 is contracted, and the free length contracts from l1 to l2, the shift quantity delta in the direction Y-Y perpendicular to the straight line X-X becomes exceedingly small, and the radius R for determining the laying position of the spring 10 can be reduced, and a spring 10 having a long free length can be used. Therefore, the large torque can be transmitted, markedly damping the torsional vibration. |
