Patent ID: 6343684
Filing Date: 2002-02-05
Classification: F16F

Abstract:
A clutch disk, comprising:a disk-shaped first damper part having a spring window with control edges; a second damper part which includes a plurality of disks and is rotatable about an axis with respect to the first damper part and has a spring window, with control edges, corresponding to the spring window of the first damper part; at least one torsion spring unit, the at least one torsion spring unit includes at least two springs which are arranged in series circumferentially in the windows in the damper parts, the torsion spring unit having ends directed opposite to one another in the circumferential direction, which ends cooperate with the control edges of the windows of the first damper part and the second damper part for damping torsional vibrations; at least one intermediate ring element rotatable about the axis with respect to the first damper part and the second damper part, the intermediate ring element having at least one spring contact arm for the at least one torsion spring unit, the spring contact arm being configured to extend substantially radially with respect to the axis, the at least one spring contact arm being arranged in the circumferential direction between mutually facing ends of the at least two springs of the at least one torsion spring unit, which ends face one another, the at least one intermediate ring element further including radial movement restraining means for protecting the at least two springs against movement in a radial outward direction in their end regions facing the at least one spring contact arm, the spring contact arm having ends that are oppositely directed in the circumferential direction, the ends of the contact arm being provided with control edges for contact with the springs; rotational angular path limiting means for limiting a rotational path between the first damper part and the second damper part, the rotational path limiting means including a stop at the first damper part and a stop at the second damper part, which act in the circumferential direction; a first stop provided at the intermediate ring element so as to cooperate with the stop at the first damper part, and a second stop provided at the intermediate ring element cooperating with the stop at the second damper part so that for each series connected spring a separate stroke limitation is provided for the spring located between mutually facing control edges, the stops of the first and second damper parts and the second stop being arranged to be effective in a spring area in which respective control edges of the contact arm and the second damper part move toward one another, and so as to limit a stroke of the spring area which is not compressed between control edges of the contact arm and the second damper part but is compressed between a second control edge of the contact arm and the control edges of the first damper part, the intermediate ring element comprising at least one of an inner ring portion arranged radially inside the at least one torsion spring unit and an outer ring portion arranged radially outside of the at least one torsion spring unit, the at least one spring contact arm being arranged to extend away from one of the inner and the outer ring portion substantially in the radial direction, the first damper part comprising a first disk element arranged axially adjacent to the second damper part, and a second disk element arranged axially on a side of the second damper part opposite to the first disk element, the second disk element being fixedly connected in a radially outer region with the first disk element, the at least one of the inner ring portion and the outer ring portion of the intermediate ring element being arranged axially between the second damper part and one of the first disk element and the second disk element of the first damper part; a bearing ring element connected to a radially inner region of the first disk element so that the first disk element is fixed with respect to rotation relative to the bearing ring element, the inner ring portion of the intermediate ring element being arranged between the first disk element and the second damper part; a friction arrangement configured to act between the second damper part and the first damper part so as to provide a torsional vibration damping frictional force, the second disk element being arranged to axially contact the second damper part; and spring means provided between the second damper part and the bearing ring element for pretensioning the second disk element toward the second damper part.