A device for damping pivotal movements of a wheel-supporting...

B - Operations – Transporting – 62 – D

Patent

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Details

B62D 55/108 (2006.01) B60G 7/02 (2006.01) B60G 13/04 (2006.01) F16D 3/14 (2006.01) F16F 15/023 (2006.01)

Patent

CA 2381201

A device for position and speed-de-pendent damping of pivotal movements of a wheel--supporting pendular arm (12) of a motor vehicle, the device comprising a housing (16) with a cavity for rotatable support of a swing axle of the pendu-lar arm (12); a plate pack arranged in the housing; a first annular pressure disk (28), torsionally fixed but axially moveable on the swing axle of the pen-dular arm; a second annular pressure plate (30), tor-sionally fixed but axially moveable in the housing (16), the two pressure plates (28, 30) having op-posing sides with members (32, 34) designed, on rotation of the first pressure plate (28), to produce an axial movement of the pressure plates (28, 30) relative to one another; and a compression spring unit (42, 44), designed to exert a compressive force on the pressure plates and on the plate pack. An ax-ially moveable piston (46) is arranged between the compression spring unit (42, 44) and the pressure plates (28, 30), a restrictor element (50, 62) allow-ing a hydraulic pressure medium to flow from one side of the piston (46) to the other.

L'invention concerne un dispositif d'amortissement pour un bras (12) pendulaire de véhicule à moteur supportant un roue, à modulation d'amortissement en fonction de la position et de la vitesse,. Ce dispositif comprend un boîtier (16) présentant une cavité qui supporte de manière rotative l'essieu oscillant du bras (21) pendulaire, un groupement de plaques montées dans le boîtier, un premier disque (28) de pression annulaire, fixe en torsion mais capable de se déplacer dans le sens axiale sur l'essieu oscillant du bras pendulaire, une seconde plaque (30) de pression annulaire, fixe en torsion mais capable de se déplacer dans le sens axial à l'intérieur du boîtier (16), ces deux plaques (28, 30) de pression présentant des côtés opposés qui comportent des organes servant à produire un mouvement axial des plaques (28, 30) de pression les unes relativement aux autres lorsqu'une rotation est imprimée à la première plaque (28) de pression, et un ensemble (42, 44) ressort de compression conçu pour appliquer une force compressive sur les plaques de pression et sur le groupement de plaques. Un piston (46) à mouvement axial est disposé entre l'ensemble (42, 44) de ressort de compression et les plaques (28, 30 ) de pression, et un élément (50, 62) restricteur permet à un fluide de pression hydraulique de s'écouler d'un côté à l'autre du piston (46).

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