Connection device between two mechanical components

An elastic suspension mount for providing an elastic connection to a vehicle body comprising:

• a subframe component to be attached to the vehicle body;
• a sheet metal component;
• an armature plate;
• a rigid through-tube extending from said armature plate and through said sheet metal component;
• a mass of elastic material bonded around said through-tube and between said sheet metal component and said armature plate;
• a connection means between said subframe component and said sheet metal component for locking said components against one another along a common joining plane and against rotation with respect to an axis perpendicular to the joining plane, said connection means being effected by a relative rotation of said components in a predetermined direction of rotation about the axis and including
• (a) in one of said components, at least one key-hole in a shape of an arc of a circle centered on the axis and having
• a first arched zone radially having a first width,
• a second arched zone radially having a second width smaller than the first width, said second zone following said first zone in the direction of rotation, and
• a third zone arranged between said first zone and said second zone, said third zone having a width which decreases progressively in the direction of rotation from a maximum equal to the width of said first zone to a minimum which is at most equal to the width of said second zone, and
• (b) the other of said components having at least one elastic locking tab suitable for engagement in said first zone as said components are brought against one another, said locking tab having a width in a radial direction which is slightly less than the width of said first zone but greater than the width of said second zone so that relative rotation of said components about the axis in the direction of rotation effects the locking of said components to one another;
• and
• a bolt and nut, said bolt passing through said through-tube and the vehicle body so that said bolt and nut attach said sheet metal component to the vehicle body.