Hydroelastic support

Abstract

The invention proposes a hydroelastic support intended to be interposed between two assemblies to be suspended by one with regard to the other, especially for the suspension of an engine in a motor vehicle, of the type comprising two armatures connected respectively to the two assemblies, these two armatures being joined by a block of elastomer material, the support comprising at least one working chamber delimited at least in part by the block of elastomer material, and an expansion chamber, these two chambers being filled at least partially with liquid and linked together by a communication passage, and of the type in which the working chamber is also delimited in part by a movable diaphragm in elastic material and whose external face comprises a cam follower with which a cam of a drive device of the movable diaphragm cooperates in order to apply to the latter displacements controlled in such a way as to create in the working chamber pressure forces synchronous with the harmonics of the vibrations of one of the said two assemblies, characterized in that the rotational drive shaft of the cam is mounted rotatably in a bearing fixed to one of the two armatures.