Valve with thermally insulating coupling and exhaust line comprising such a valve

A valve comprising an actuator having a motor shaft, a flap having a drive shaft, and a kinematic chain coupling the drive shaft to the motor shaft in rotation, the kinematic chain comprising:

• a driving member rotating around a first rotation axis, and connected in rotation to the motor shaft;
• and
• a driven member rotating around a second rotation axis substantially aligned with the first rotation axis, and connected in rotation to the drive shaft;
• wherein the kinematic chain comprises:
• an intermediate member positioned axially between the driving member and the driven member, the driving member having a driving contact element in planar or linear bearing on a complementary driving contact element of the intermediate member, the driven member having a driven contact element in planar or linear bearing on a complementary driven contact element of the intermediate member, the complementary driving contact element and the complementary driven contact element forming an angle with one another comprised between 45° and 135°;
• a driving elastic member inserted between the driving member and the intermediate member and urging the driving contact element against the complementary driving contact element;
• a driven elastic member inserted between the driven member and the intermediate member and biasing the driven contact element against the complementary driven contact element.