Quick coupling of a front work attachment on excavators

A device for quick coupling of work equipment to an excavator boom having a free end, said device comprising:

• a first coupling plate connectable to the work equipment and having catch openings formed therein;
• a second coupling plate, connectable to the free end of the boom and having hook-shaped catch elements for engaging in said catch openings of said first coupling plate thereby to couple the work equipment to the boom;
• and
• at least one locking element connected to one of said first and second coupling plates and movable in a plane in a locking direction for locking said hook-shaped catch elements in said catch openings;
• wherein at least one of said catch openings has a first wedging surface and said at least one locking element has complementary second wedging surface, wherein said at least one of said catch openings has a hook-engaging surface and said hook-shaped catch element received in said at least one of said catch openings has a rear surface remote from said hook-engaging surface, and wherein said device further comprises means for wedging said at least one locking element against said first wedging surface and adjacent said rear surface for locking said hook-shaped catch elements in said catch openings upon connection of the work equipment with the boom.