GB1228138A - - Google Patents

Abstract

1,228,138. Friction clutches. LAYCOCK ENG. Ltd. 27 Aug., 1968 [29 Aug., 1967], No. 39385/67. Heading F2C. In a diaphragm spring type friction clutch wherein one or more driven plates (not shown) is/ are clamped between a driving flywheel (not shown) and a presser plate 1 by a diaphragm spring 2, facing fulcrums for the spring are provided on opposite sides of the spring by lips 10, 12 respectively of a main cover plate pressing 3 bolted at (5) to the flywheel and a secondary pressing 6 which is mounted, directly or indirectly i.e. via spacing plates or shims, faceto-face on and secured, by screws, rivets or the like, to the main pressing 3, and, on assembly, is disposed within the main cover plate pressing and does not extend around the presser plate periphery. As shown, the main pressing 3 has cut-outs 15 between the bolt holes (5) and has mounting platforms 16 provided by outwardly pressed tabs to which tabs 17 of the secondary pressing 6 are riveted. The presser plate has projections 7 passing through windows in the secondary pressing 6 to provide a driving connection and has seatings 8 on which the diaphragm spring is retained by a spring ring 9. Alternatively the presser plate driving connection may comprise straps. The secondary pressing 6 flat zone may have stiffening depressions. The mounting platforms 16 may be provided on an inwardly directed deformation of the main pressing with (Fig. 4, not shown) or without (Fig. 5, not shown) shearing of said pressing, or by inwardly directed tabs of the main pressing (Fig. 6, not shown).