GB675487A - Improvements in or relating to friction clutch and flywheel assemblies - Google Patents

Abstract

675,487. Clutches. MASSEY, Ltd., B. & S., and FOSTER, J. June 30, 1950 [April 2, 1949], No. 9005/49. Class 80 (ii). A friction clutch between a driving flywheel or gear 11, Fig. 1, and a driven shaft 16 comprises a. two-part housing 12, 17 secured to the web 10, the part 12 being mounted on the shaft through antifriction bearings 14, 15, a pair of friction discs 18 splined on the shaft and co-operating with the inner face of the part 12 and with members 19, 24 slidable in the housing, and a piston 21 secured to an extension 20 of the member 19 and movable in a cylinder 22 which is secured to the housing and to which pressure fluid may be admitted through a duct 22a to engage the clutch against the action of disengaging spring means. The member 24, located between the two discs 18, comprises a hollow disc provided with internal walls 27, Fig. 4, forming annular chambers 25 which are in communication with each other through staggered apertures 26 in the walls 27, the inner chamber communicating with the interior of the housing through ports 29 and the outer chamber having ports 30 in communication with ports 31 in the housing. During rotation, cooling air is drawn into the housing through ports 23, and part flows through the hollow disc 24 to the outlet ports 31, the discs 18 being provided with apertures 18a, while the remainder flows through passage 20a in the extension 20 to outlet ports 32. Alternatively, the hollow disc 24 may have radial internal walls 33, Fig. 6, forming radial chambers 34 which communicate at the inner periphery through ports 29<SP>1</SP> with the interior of the housing and at the outer periphery through ports 30' with the outlet ports 31. The disc 24 may be a, single casting or may be formed of two plates secured together.