Distribution assembly for a seed drill with an associated clearance adjustment device and associated seed drill

A distribution assembly for a seed drill comprising:

• a sealed housing including a fixed part and a door that can move between an open position and a closed position,
• a drive shaft of a motor opening onto the fixed part,
• a distribution member for a plurality of granular elements arranged to distribute a plurality of granular elements in a discrete and singular manner in the form of a perforated disk having a first surface facing the interior of the door in the closed position and a second surface facing the fixed part in the closed position, the disk being mounted around the motor drive shaft to be driven in rotation at least in the closed position and being disposed inside the housing to separate the interior of the housing into a first chamber and a second chamber, which are distinct, the first chamber being configured to receive all or part of the plurality of granular elements and the second chamber being closed by the door,
• the second chamber includes a bell-shaped intermediate partition including a circular bearing surface bearing on a peripheral edge of the first surface of the disk,
• a device for adjusting a clearance corresponding to the distance between the second surface of the disk and the fixed part of the housing in the closed position,
• wherein:
• the clearance adjustment device is configured to allow translational movement, in an axial direction parallel to the drive shaft, of the intermediate partition-disk subassembly relative to the fixed part of the housing and to constrain the position of the intermediate partition-disk subassembly relative to the fixed part,
• the adjustment device includes an adjustment member for the clearance protruding from the outer face of the door, and configured to adjust the clearance.