(19)
(11) EP 2 657 567 A8

(12) CORRECTED EUROPEAN PATENT APPLICATION
published in accordance with Art. 153(4) EPC

(15) Correction information:
Corrected version no 1 (W1 A1)

(48) Corrigendum issued on:
11.12.2013 Bulletin 2013/50

(43) Date of publication:
30.10.2013 Bulletin 2013/44

(21) Application number: 10861196.3

(22) Date of filing: 22.12.2010
(51) International Patent Classification (IPC): 
F16F 15/134(2006.01)
F16D 13/64(2006.01)
(86) International application number:
PCT/JP2010/007416
(87) International publication number:
WO 2012/085966 (28.06.2012 Gazette 2012/26)
(84) Designated Contracting States:
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

(71) Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
Toyota-shi, Aichi-ken, 471-8571 (JP)

(72) Inventors:
  • TAKENAKA, Tetsuhiro
    Toyota-shi, Aichi-ken, 471-8571 (JP)
  • KURIMOTO, Tomoyasu
    Toyota-shi, Aichi-ken, 471-8571 (JP)
  • OKANO, Nobuhiko
    Toyota-shi, Aichi-ken, 471-8571 (JP)
  • HAGINO, Yasuyuki
    Toyota-shi, Aichi-ken, 471-8571 (JP)
  • WATARAI, Shinichiro
    Toyota-shi, Aichi-ken, 471-8571 (JP)

(74) Representative: Kuhnen & Wacker 
Patent- und Rechtsanwaltsbüro Prinz-Ludwig-Straße 40A
85354 Freising
85354 Freising (DE)

   


(54) TORSIONAL OSCILLATION DAMPING DEVICE


(57) Disclosed is a torsional vibration attenuation apparatus which can prevent a first rotation member and a second rotation member from being twisted with each other alternately to a positive side and to a negative side, while suppressing large torsional vibrations from being generated by widening the scope of the torsion angle of the first rotation member and the second rotation member. The torsional vibration attenuation apparatus 1 comprises a boss 5, a cam member 6 disposed in the circumferential portion of the boss 5 and having a cam surface 6A integrally rotated with the boss 5, and an arm member 19 disposed between the cam member 6 and a coil spring 4. The arm member 19 having one end portion held in contact with the cam surface 6A and the other end portion held in engagement with a spring seat 16 for the coil spring 4, is swingable around a pin 18 bridged between disc plates 7, 8. The curvature of the cam surface 6, with which the one end portion of the arm member 19 is brought into contact when the boss 5 is twisted in a positive side with respect to the disc plates 7, 8, is larger than the curvature of cam surface 6A, with which the one end portion of the arm member 19 is brought into contact when the boss 5 is twisted from a neutral position in a negative side with respect to the disc plates 7, 8.