Motorized split-hinge device for a very heavy double door and very heavy double door equipped with such a device

A motorized split-hinge device for a door that includes a flap (1) that is mounted to pivot around an essentially vertical axis of rotation (1′) on a frame (2), the device comprising:

• a stationary split-hinge part (3) that is integral with said frame (2) and a movable split-hinge part (4) that is integral with said flap (1) and is mounted in rotation relative to said stationary split-hinge part (3) around a pivoting shaft (5),
• said movable split-hinge part (4) comprising a drive mechanism (6, 8) that is driven by a motor unit (7) able to drive said movable split-hinge part (4) in rotation around said pivoting shaft (5),
• said motor unit (7) being mounted in a removable manner on said drive mechanism (6, 8) and on the stationary split-hinge part (3), and attached to the stationary split-hinge part using means for quick attachment and release (9, 10), and being kept in a drive position of said drive mechanism (6, 8) with anti-rotational locking of said motor unit (7) relative to the flap (1),
• wherein the motor unit (7) comprises a drive hub (12), and wherein the drive mechanism comprises a drive shaft (6) that extends the movable split-hinge part (4) coaxially to said pivoting shaft (5), and means for connection and driving in rotation (8, 11) that drives, through said drive hub (12), said drive shaft (6) in axial rotation, and
• wherein the drive hub (12) passes through a forward post (7″) of the motor unit (7) and has two opposing lower and upper surfaces, passed through perpendicularly by said drive hub (12) that opens onto said two opposing lower and upper surfaces through two openings, respectively lower opening (12′) and upper opening (12″), so as to allow introduction of the drive shaft (6) into said drive hub (12) through the lower opening (12′), and holding the drive shaft (6) in place with axial locking in said drive hub (12) using a stop (6′) that is attached in a removable way to the part of the free end of said drive shaft (6) that projects from the upper opening and comes to rest against the upper surface, preventing withdrawal of said drive shaft (6) from said drive hub (12).