TORSIONAL VIBRATION DAMPING DEVICE

摘要

Disclosed is a torsional vibration attenuation apparatus which can angularly widen the range of a torsion angle of an outer peripheral cylindrical member and an inner peripheral cylindrical member, thereby making it possible to heighten torsional rigidity of the outer peripheral cylindrical member and the inner peripheral cylindrical member. The torsional vibration attenuation apparatus 10 includes an intermediate cylindrical member 13 intervening between the outer peripheral cylindrical member 11 inputted with rotational torque and the inner peripheral cylindrical member 12 outputting the rotational torque. The inner peripheral portion of the outer peripheral cylindrical member 11 and the outer peripheral portion of the intermediate cylindrical member 13 are connected with each other by square screw threads 13b, 14b. The inner peripheral portion of the intermediate cylindrical member 13 and the outer peripheral portion of the inner peripheral cylindrical member 12 are held in ball-spline engagement with each other. A plate spring 23 is provided between the inner peripheral portion 14c of a side wall 14B of a cup member 14 and the outer peripheral portion 13c of the axial one end of the intermediate cylindrical member 13 in the direction of the rotation axis L. A plate spring 26 is provided between the inner peripheral portion 15b of a side wall 14B of a cup member 14 and the outer peripheral portion 13d of the axial other end of the intermediate cylindrical member 13 in the direction of the rotation axis L.