Radiator shutter for motor vehicles

A radiator shutter, for a motor vehicle, for the controlled ventilation of the engine,

• having a frame in which at least two slats are rotatably mounted in such a way that they can be pivoted from
• a closed position, in which the leaves of the slats are arranged substantially parallel to the plane of the frame and, in the area in which they adjoin one another, either partly overlap or rest tightly on one another, so that the frame opening is substantially closed for the flow of air,
• into an open position, in which the leaves of the slats are arranged substantially perpendicular to the plane of the frame, so that the frame opening is substantially opened to the maximum for the flow of air,
• wherein the slats are mounted in bearing points on two opposite sides of the frame,
• wherein, in or on the frame, a motor which drives a single slat is provided on a motor side of the frame, and wherein, on the same motor side of the frame, a coupling element is provided which transmits the rotation of the driven slat synchronously to the further slats,
• wherein a locking element is provided for each slat on the mounting side of the frame facing away from the motor side of the frame, in the area of the mounting of the slats provided there, and wherein the locking elements are coupled directly or indirectly in such a way that, if at least one of the locking elements does not rotate synchronously with all the other locking elements, the rotational movement of the locking elements is blocked in at least one direction,
• wherein the locking elements have at least one engagement pin offset radially with respect to the axis of rotation of the slats, which extends parallel to the axis of rotation of the slats and, during rotation of the slats, completes an arcuate movement synchronously with the latter, and the engagement pins of all the locking elements are coupled via a common locking rod extending perpendicular to the axis of the slats,
• wherein the engagement pins run in locking recesses in the locking rod, and
• wherein:
• the engagement pins are deflected substantially to the maximum extent in the closed position or in the open position in a main direction of extension of the locking rod with respect to the axis of rotation of the respective slat, and, during the rotation into the open position or the closed position, rotate into a position located in the main direction of extension of the locking rod, substantially at a height of the axis of rotation of the respective slat, or
• the locking rod is guided in a locking guide in such a way to be displaced only in a single direction perpendicular to axes of rotation of the slats but not in a direction of the normal to the plane which is covered by the axes of rotation of the slats.