Leaf articulation mechanism for motor vehicle, has connections with degrees of freedom in translation along respective lines, and connecting rods connected between them by another connection with degree of freedom in rotation around axis

摘要

#CMT# #/CMT# The mechanism has an articulated assembly (16) with connecting rods (18, 20) connected to a structure by respective connections (24, 42) and a leaf (4) by connections (28, 38), where the connections have degrees of freedom in rotation around respective axes (A1- A4) distinct and parallel between them. Each of the connections (28, 42) has a degree of freedom in translation along respective lines. The rods are connected between them by a connection (48) with degree of freedom in rotation around an axis (A5) parallel to the axes (A1-A4). #CMT#USE : #/CMT# Used for pivoting a leaf e.g. rear door intended to close a boot, and a rear platform on a structure of a motor vehicle (all claimed). #CMT#ADVANTAGE : #/CMT# The connection has the degree of freedom in translation along lines respectively, thus increasing the possibility of trajectory with respect to articulation of the two rods and connection, and hence permitting to define complex trajectory with rotational and translational phases. The mechanism therefore ensures large displacement, while offering compactness to the mechanism. The connecting rods are connected between them by the connection with degree of freedom in rotation around the axis parallel to the other axes, thus permitting to determine the trajectory with precise guiding, and hence avoiding disengagement of the bumper for displacement of the door, while improving the aesthetic appearance of the vehicle. The rods permit displacement of a cover plate with respect to the structure, thus avoiding the cover plate to cause friction against the door, during displacement of the door, and hence limiting the usury of the cover plate and formation of friction noise. The rods have a bent shape so as to avoid the collision between the rods and the structure and to avoid interference with the bumper. #CMT#DESCRIPTION OF DRAWINGS : #/CMT# The drawing shows a three-fourth perspective view of a rear part of a motor vehicle. A1-A5 : Rotational axes 4 : Leaf 16 : Articulated assembly 18, 20 : Connecting rods 24, 28, 38, 42, 48 : Connections.