Multiple-disc brake electromechanical actuator for transport...

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

Patent

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Details

F16D 65/18 (2006.01) F16D 65/14 (2006.01) F16D 65/56 (2006.01) F16D 65/38 (2006.01) F16D 66/00 (2006.01)

Patent

CA 2433435

The present invention relates to an electromechanical multiple- disk brake actuator for a means of transport, in particular for an aircraft. This actuator includes, mounted on a frame (9) - a first, reversible assembly including a central screw (1), a first electric motor (2) for rotating the central screw, a first nut (3) axially displaceable over the central screw when the latter is rotated, and means (4) interposed between the central screw and the first nut to permit reversible displacement of one, at least, of these two members; and -a second, non-reversible assembly including an annular screw (5) externally integral with the first nut (3), a second electric motor (6) for rotating the annular screw and the first nut, a second nut (7) locked against rotation in relation to the frame (9) but axially displaceable over the annular screw when the latter is rotated, the annular screw (5) and the second nut (7) being in engagement via their threads which make their displacement non- reversible, and a piston (8) provided at one of the ends of the second nut (7) to press the disks (29) against one another in order to ensure the service braking of the means of transport during actuation of the first motor (2), and parking braking during actuation of the second motor (6).

L'actionneur électromécanique selon l'invention comprend, - un premier ensemble réversible comprenant une vis centrale (1), un premier moteur électrique (2) destiné à entraîner la vis centrale en rotation, un premier écrou (3) déplaçable axialment sur la vis centrale lorsque celle-ci est entraînée en rotation, et des moyens 84) interposés entre la vis centrale et le premier écrou pour permettre un déplacement réversible de l'un au moins de ces deux organes; et - un second ensemble irréversible comprenant une vis annulaire (5) solidaire extérieurement du premier écrou (3), un deuxième moteur électrique (6) destiné à entraîner en rotation la vis annulaire et le premier écrou, un deuxième àcrou (7) immobilisé en rotation par rapport au bâti (9), mais deplaçable axialment sur la vis annulaire lorsque celle-ci est entraînee en rotation, et un piston (8) prévu à l'une des extrémités du deuxième écrou (7) pour serrer les disques (29) les uns contre les autres afin d'assurer un freinage de service lors de l'actionnement du premier moteur et un freinage de parc lors de l'actionnement du second moteur.

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