Coupling assembly

F - Mech Eng,Light,Heat,Weapons – 16 – D

Patent

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Details

F16D 23/00 (2006.01) F16D 67/04 (2006.01)

Patent

CA 2082087

A coupling assembly includes a clutch assembly and a brake assembly. The brake assembly includes an annular piston which is formed as one piece with a base member. An annular cylinder chamber is formed as one piece with a second member and telescopically receives the annular piston. Force transmitting surfaces on the two members engage opposite sides of a friction disk. The annular piston and cylinder extend around the outside of the friction disk to at least partially block a flow of contaminants in a radially inward direction toward the friction disk. Passages are formed in a lower portion of the annular piston to accommodate a flow of cooling fluid and to enable any contaminants which enter the brake assembly to flow out of the brake assembly. The brake assembly is advantageously urged to an engaged condition by spring assemblies which include posts and spring elements which extend into a space between the clutch assembly and a flange portion of a flywheel. Arcuate spring retainer elements extend between outer end portions of the posts to hold the spring elements in place on the posts. The clutch assembly is operated from a disengaged condition to an engaged condition by fluid pressure conducted from the brake assembly.

La présente invention a pour objet un ensemble d'accouplement comportant un ensemble d'embrayage et un ensemble de freinage. L'ensemble de freinage inclut un piston annulaire comportant une base et formé d'une seule pièce. Une chambre de cylindre annulaire formée d'une seule pièce avec une deuxième partie reçoit télescopiquement le piston. Les surfaces de transmission des deux pièces viennent en contact avec les deux faces opposées d'un disque d'embrayage. Le piston et le cylindre annulaires se prolongent autour du disque d'embrayage de manière à bloquer, du moins partiellement, l'admission de corps étrangers circulant dans une direction radiale vers l'intérieur du disque d'embrayage. Des passages sont aménagés dans la partie inférieure du piston accommoder l'écoulement d'un fluide de refroidissement et permettre l'évacuation d'éventuels corps étrangers. L'ensemble de freinage est avantageusement mis en prise par des ensembles de ressorts constitués de tenons et de ressorts qui occupent un espace comprise entre l'ensemble d'embrayage et le rebord d'un volant. Ces éléments de retenue en forme de coupelles maintiennent les ressorts en place sur les tenons. L'ensemble d'embrayage passe de l'état débrayé à l'état embrayé sous l'effet de la pression du fluide de l'ensemble de freinage.

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