The invention relates to a mobile shutter with built-in guide system for fodder feeding machines with own equipment for loading the ensilaged fodders in the rear part. According to the invention, the shutter comprises a wall (1), two guide profiles (2) welded on the wall vertically sliding on two rails (A) of a bucket (B), two guide eyelets (3) provided with oblong holes, welded on the wall, and two bolts (4) which allow the device to be attached to some driving arms (C) articulated on the bucket (B) of the machine and driven by two hydraulic cylinders (D), the ends of the driving arms (C) articulated to the shutter by some bolts (4) moving during operation on a circular arc, said motion being possible due to the oblong holes of the eyelets (3) ensuring the guiding and sliding of bolts on a distance (X), allowing the mobile device to describe a vertical impact-free and blocking-free motion vertically on rails (A).
