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US 4,903,812 AGranted
Clutch disc
AssigneeFichtel & Sachs AG
InventorsMatthias Fischer, Harald Jeppe
Life of this patent
Estimating the term…
Abstract
The invention relates to a clutch disc including an idling damping device and an under-load damping device, wherein the idling damping device is active between two hub parts coupled with each other by a toothing having play in the circumferential direction. In order to avoid the load-change impact, centrifugal weights are provided between the two parts. The centrifugal weights frictionally couple the two parts by means of a self-intensifying effect.
Claims13
A clutch disc for a motor vehicle friction clutch, comprising
- (a) a hub rotatable about a rotation axis,
- (b) a first disc part rotatable about the rotation axis within a limited rotational play in relation to the hub,
- (c) at least one first spring coupling the first disc part rotationally elastically with the hub and dimensioned for idling operation,
- (d) a second disc part rotatable in relation to the hub and the first disc part,
- (e) at least one second spring, dimensioned for operation under load, which rotationally elastically couples the second disc part with the first disc part,
- (f) clutch friction linings connected with the second disc part,
- (g) a friction device acting between the hub and the first disc part and controllable by at least one centrifugal weight body stressed by a spring contrarily of its centrifugal direction, the friction torque of which device commences above the idling rotation rate and increases with increasing rotation rate, the first disc part has a cylindrical inner wall coaxial with the axis of rotation and wherein the centrifugal weight body is mounted on the hub pivotably about a pivot axis parallel to the rotation axis and for the achievement of a self-intensifying effect comprises a part-cylindrical friction face arranged, seen in the circumferential direction of the cylindrical inner wall, exclusively on one side of the pivot axis, which friction face rests on the inner wall when the centrifugal weight body is pivoted radially outwards, the centrifugal weight body is curved in arcuate form around a centrifugal weight carrier which annularly surrounds the hub and is non-rotatably held thereon, from which carrier a mounting bracket provided with a slot protrudes radially, for the mounting of the centrifugal weight body, and wherein the centrifugal weight body carries, at its end adjacent in the circumferential direction to the mounting bracket, a flange pivotably guided in the slot, which flange is supported, on the side of the mounting bracket remote from the friction face, through a compression spring on the centrifugal weight carrier.
4 more elements
A clutch disc for a motor vehicle friction clutch, comprising
- (a) a hub rotatable about a rotation axis,
- (b) a first disc part rotatable about the rotation axis within a limited rotational play in relation to the hub,
- (c) at least one first spring coupling the first disc part rotationally elastically with the hub and dimensioned for idling operation,
- (d) a second disc part rotatable in relation to the hub and the first disc part,
- (e) at least one second spring, dimensioned for operation under load, which rotationally elastically couples the second disc part with the first disc part,
- (f) clutch friction linings connected with the second disc part,
- (g) a friction device acting between the hub and the first disc part and controllable by at least one centrifugal weight body stressed by a spring contrarily of its centrifugal direction, the friction torque of which device commences above the idling rotation rate and increases with increasing rotation rate, the first disc part has a cylindrical inner wall coaxial with the axis of rotation and wherein the centrifugal weight body is mounted on the hub pivotably about a pivot axis parallel to the rotation axis and for the achievement of a self-intensifying effect comprises a part-cylindrical friction face arranged, seen in the circumferential direction of the cylindrical inner wall, exclusively on one side of the pivot axis, which friction face rests on the inner wall when the centrifugal weight body is pivoted radially outwards, the centrifugal weight body is curved in arcuate form about a centrifugal weight carrier annularly enclosing the hub and held non-rotatably thereon and wherein the centrifugal weight body is guided pivotably with one end on the centrifugal weight carrier by means of a tilt bearing, defining the pivot axis, which consists of a radially open groove extending parallel with the axis of rotation, and of a rib engaging tiltably in the groove.
4 more elements
Dependencies are inferred from the claim text.