Coupling of an excavator shovel

An articulation of an excavator shovel, comprising

• a shovel having a back wall and a bearing bracket having an upper edge,
• a stick having a free end and articulated to said bearing bracket at a pivot point arranged at the free end of said stick, said stick having an upper flange above said pivot point,
• a cap mounted on said free end of said stick, said cap faces the back wall of said shovel, said cap having a surface defining a radius with a center located at said pivot point, said surface of said cap meets said upper flange at a meeting point,
• a scraper plate having a width substantially corresponding to the width of said stick is disposed at the back wall of said shovel mounted parallel to said upper edge of said bearing bracket, facing said stick and said cap on the latter, said scraper plate has a free end substantially touching but spaced from said cap defining only a clearance between said cap and the free end of said scraper plate which assures free passage of said shovel during pivoting about said pivot point,
• an imaginary extension of said scraper plate intersecting the radius of said cap adjacent said meeting point on the upper flange of said stick at a position of said shovel pivoted relative to said stick.