192 clutches and power-stop control – Clutches – Axially engaging
Patent
1994-09-08
1996-04-23
Pitts, Andrea L.
192 clutches and power-stop control
Clutches
Axially engaging
192 8923, 192 8924, F16D 1371
Patent
active
055095194
DESCRIPTION:
BRIEF SUMMARY
The present invention is concerned with diaphragm clutches of the push-off type, especially for motor vehicles, and with diaphragm mechanisms for such clutches.
It will be recalled (FIGS. 1 to 3) that a clutch comprises a reaction plate 100, an annular cover plate 3 which is adapted to be secured to the said reaction plate 100, at least one annular pressure plate 2 coupled in rotation to the cover plate 20 and mounted for axial movement with respect to the latter, and an annular diaphragm 4, which, bearing on the cover plate 3, works axially on the pressure plate 2 in a direction for which the said plate is displaced away from the cover plate for contact with the friction pads 107 of a friction plate 102.
The reaction plate 100 is adapted to be secured, in particular by means of screw fasteners, to the crankshaft of the internal combustion engine, and commonly carries a starter crown, while the friction plate 102 has a hub 103 which is mounted in rotation, in this case by means of splines, with the input shaft 104 of the gearbox.
A single friction plate and a single pressure plate are provided here, but in a modification a plurality of plates 2 and plates 102 may be provided.
The friction pads 107 are conventionally secured to a support, and are adapted to be gripped, in the position in which the clutch is engaged (FIG. 1), between the plates 100, 2. The plate 102 in this example includes a torsion damping device. More precisely, the friction pads 107 extend axially on either side of the support, which is coupled to guide rings through spacing bars, with the said spacing bars securing the guide rings together.
These guide rings extend axially on either side of a damper plate, with springs 108, acting between them, being lodged partly in windows formed in facing relationship in the said guide rings and damper plate. The damper plate is secured, optionally with a clearance, to the hub 103 for rotation with the latter.
The support may of course be secured directly to the hub 103, and the clutch plate 102 may be rigid.
The diaphragm 4 has a resilient peripheral portion 41 defining a Belleville ring, and a central portion which is divided into radial fingers 42, which are separated from each other by slots. Since the clutch is of the push-off type, the said peripheral portion 41 in this example is mounted internally, in such a way that it can be deflected on the cover plate by the action of assembly means 5, which attach the diaphragm 4 to the cover plate 3 for deflecting movement, and which are carried by the latter, while radially further outwards it bears on an annular abutment 9 carried by the pressure plate 2 and defined, in this example, by a projecting ridge which is divided into annular sectors of the latter.
The fingers 42 are adapted to be manoeuvred in a thrust mode by a declutching member 105. In FIG. 1, this consists of a clutch release bearing 105, which includes a manoeuvring element adapted to be subjected to the action of a control member such as a declutching fork 106, and an actuating element which is adapted to act on the diaphragm, the said actuating element comprising a ball bearing, one of the rings of which is so configured as to work in a thrust mode on the ends of the fingers of the diaphragm 4, on the face of the latter which is directed towards the cover plate 3. For declutching (FIG. 2), it is therefore necessary to work in a thrust mode on the fingers 42 using the release bearing 105, so as to cause the diaphragm to deflect, disengage the clutch, and release the friction pads 107.
The cover plate 3, the pressure plate 2, and the diaphragm 4 constitute a clutch mechanism 1, which in this example is a single unit, the said pressure plate being coupled in rotation to the cover plate 3, and being mounted on the latter, in such a way that it can move axially, by means of tangential tongues 110 (FIG. 3), which are secured in a manner known per se, by means of rivets at one of their ends, to the cover plate 3, and at their other ends to lugs 109 of the pressure plate.
In a modification, t
REFERENCES:
patent: 2359104 (1944-09-01), Geyer
patent: 3595355 (1971-07-01), Maucher et al.
patent: 3811544 (1974-05-01), Maucher
patent: 4241819 (1980-12-01), Babcock et al.
patent: 4633989 (1987-01-01), Yoneda
patent: 4744448 (1988-05-01), Maycock et al.
patent: 5301782 (1994-04-01), de Briel et al.
patent: 5377803 (1995-01-01), Link et al.
Pitts Andrea L.
Valeo
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