192 clutches and power-stop control – Elements – Clutch element resiliently carried on hub
Patent
1996-07-08
1998-10-06
Bonck, Rodney H.
192 clutches and power-stop control
Elements
Clutch element resiliently carried on hub
192 7017, 1922131, F16F 15123, F16F 15129
Patent
active
058163808
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention concerns torsional dampers, notably clutch friction assemblies for motor vehicles.
2. Description of the Prior Art
Such a damper is, for example, described in the document FR-A-2 693 778, and has (FIGS. 1 to 3) two coaxial parts mounted so as to move with respect to each other counter to first elastic members acting circumferentially 5, referred to hereinafter as high-stiffness springs, and first friction means 14, 17, 15 acting axially.
One of the parts has an input element 1 fixed to two guide washers 2, 3 connected to each other and fixed by columns 10.
The other part itself has a disc 4 and an output element 7 mounted so as to move with respect to each other counter to second elastic members 8 acting circumferentially, referred to hereinafter as low-stiffness springs, with the action of meshing means with clearance 6 and second friction means acting axially 13, 16, 12.
The meshing means with clearance 6 therefore limit the relative angular movement between the disc 4 and the output element 7.
More precisely, the guide washers 2, 3 are disposed on each side of the disc 4, being transversely oriented just like the disc 4.
The columns 10, on the one hand, pass with a circumferential clearance through the disc 4 by means of recesses 42 formed at the external periphery thereof and, on the other hand, also fix the input element to the guide washers 2, 3.
This input element 1 is here mounted on the internal face of the guide washer 2 and consists of a support disc bearing, at its external periphery, fixed on each of its faces, friction linings 11, optionally divided into segments.
The linings 11 are designed to be clamped between the thrust and reaction plates (not visible) of the clutch so that the input element is fixed with respect to rotation on a driving shaft, the crankshaft of the internal combustion engine in the case of application to a motor vehicle.
The output element 7 consists of a hub 7 provided on the inside with flutes 71 for its rotational connection to a driven shaft, namely the input shaft of the gear box in the case of application to a motor vehicle.
The engine torque is thus transmitted from the input element 1 to the output element 7.
The first elastic members 5 consist of coil springs mounted in pairs in housings 31, 41, apertures in this case, formed respectively opposite each other in the guide washers 2, 3 and the disc 4.
In this case, the pairs of springs 5 are mounted without clearance in the apertures 31 in the guide washers 2, 3 and without clearance for certain pairs in the apertures 41 of the disc 4 and with clearance for the other pairs in the said apertures 41.
The springs 5 thus act in a stepped manner whilst being more rigid than the second elastic members 8 also consisting of coil springs, with a lower stiffness in this case, notably to filter the vibrations when the vehicle engine is idling.
The high-stiffness springs 5 are designed to filter the vibrations while the vehicle is moving.
The meshing means with clearance 6 include teeth formed at the internal periphery of the disc 4 and complementary teeth formed at the external periphery of the output hub 7 by means of a radial flange 90 which the said hub 7 has radially projecting at its external periphery.
The hub 7 thus has trapezoid-shaped teeth 61 meshing with circumferential clearance with recesses 62 in the disc 4 and vice versa, the said disc 4 having trapezoid-shaped teeth 63 meshing with circumferential clearance with recesses 64 in the hub 7 surrounded by the guide washers 2, 3 and the disc 4.
The flange 90 of the hub 7 is provided with recesses 83 open radially towards the outside. The disc 4 has, in correspondence at its internal periphery, recesses 82 open radially towards the inside.
The low-stiffness springs 8 are thus mounted in the recesses 82, 83, facing each other and bearing on the lateral edges of the said recesses 82, 83 by means of cups 81 with a back face in the shape of a dihedron to marry the shape of the said lateral edg
REFERENCES:
patent: 5240458 (1993-08-01), Linglain et al.
patent: 5246398 (1993-09-01), Birk et al.
patent: 5249660 (1993-10-01), Feldhaus et al.
patent: 5251736 (1993-10-01), Jeppe et al.
Hemeryck Bruno
Lefevre Gerard
Lopez Perez Carlos
Vandenhende Christian
Bonck Rodney H.
Rodriguez Saul
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