Antivibration device for vehicle and link rod comprising such a device

Antivibration device comprising a first annular armature surrounding a second armature, the armatures defining between them a free space, at least a first elastomer body being placed at least partially in the free space between the first and second armatures, the first body being secured to the first armature, the first elastomer body also being secured to a first intermediate armature which is adjacent to the second armature, wherein that the intermediate armature has a bearing surface suitable for bearing against a bearing surface of complementary shape belonging to the second armature, and the intermediate armature being suitable for bearing against the said second armature when the first and second armatures move relative to one another in a first direction, in a first alignment corresponding to a compression of the said first elastomer body, the said first intermediate armature being free relative to the second armature and being suitable for separating itself from the said second armature when the first and second armatures move one relative to the other in a second alignment opposite the said first alignment.