GB830428A - Improvements in or relating to friction clutches - Google Patents

Abstract

830,428. Friction clutches. AUTOMOTIVE PRODUCTS CO. Ltd. March 10, 1958 [March 8, 1957], No. 7798/57. Class 80 (2). A friction clutch for motor lorries &c. comprises a driven clutch disc 13 which can be clamped between a driving fly-wheel 10 and a pressure-plate 18, a number of plates 26 secured to the flywheel having radial slots 31 embracing rearwardly-projecting lugs 23 on the pressureplate which is accordingly constrained to rotate with the flywheel. The lugs 23 each have a radial slot within which is pivoted the usual throw-out lever 35 mounted therein by a pin 33 and a needle roller bearing, each throw-out lever also being connected to a cover-plate 19 fast on the flywheel pivot pin 40 and needle roller bearing articulating it to a bolt 36 universally tiltable with respect to the casing by adjustable means. The threaded spigot 41 of each bolt 36 carries a nut 52 having two frusto-spherical surfaces 43, 44 engaged with corresponding frusto-conical surfaces in the cover-plate 19 and a second plate 47 secured thereto, to allow the universal movement of the bolt. The bolt 36 is axially movable relative to the clutch for purposes of adjustment by turning the nut 52, which is then held in position by a locking-bar 49 secured by a set-screw 51 to the plate 47 and having a toothed end engaging peripheral serrations on the nut. A roller 37 on each of the throw-out levers 35 engages a thrust-ring 38, which is itself connected to the casing 19 by flexible bars 56, and springs 55 retain the rollers and the thrust-ring in engagement.