Actuator for viscous clutch with magnetic oil circulation...

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

Patent

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F16D 29/00 (2006.01) F16D 35/02 (2006.01) F16K 31/02 (2006.01)

Patent

CA 2470282

The invention relates to an actuator which, by a movement of a component which is generated by means of an electric current, can effect control of another component in a mechanical environment having rotating parts which are housed in a very small space. For this purpose, a rotating element, for example a clutch shaft (1; 21), is designed to be hollow, and an electromagnetic coil arrangement (7; 24) is housed in this cavity in such a way that the excitation of the coil is converted into a mechanical displacement of a component arranged outside the clutch shaft, for example of a sleeve sliding axially on the clutch shaft. For this purpose, parts of the clutch shaft are made ferromagnetic and are integrated in the magnetic loop of the coil (7; 24). The actuator according to the invention can be used, for example, in a viscous clutch for controlling the throughput of shear medium.

La présente invention concerne un actionneur qui, par le biais d'un mouvement déclenché par un courant électrique, peut contrôler un autre élément dans un dispositif mécanique comportant des pièces rotatives logées dans un espace très petit. € cette fin, un élément rotatif, par exemple un arbre d'embrayage (1; 21), est conçu pour être creux, et un dispositif à bobine électromagnétique (7; 24) est logé dans cette cavité de telle sorte que l'excitation de la bobine est convertie en un mouvement mécanique d'un élément disposé hors de l'arbre d'embrayage, par exemple une chemise qui coulisse sur le plan axial de l'arbre d'embrayage. Dans ce but, des pièces de l'embrayage sont ferromagnétiques et sont intégrées dans la boucle magnétique de la bobine (7; 24). Selon l'invention, l'actionneur peut, par exemple, être utilisé dans un visco-coupleur pour en contrôler le débit de force de cisaillement.

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