Device for rapid tool coupling and release on tool arms

A device for rapid tool coupling and release on tool arms, comprising a first rapid-attachment organ associated to a tool arm and being provided with a coupling element and hollow seatings destined respectively to couple in at least one seating and with a pivot, both at least one seating and pivot being predisposed on a tool, said first rapid-attachment organ having at least a portion of a coupling surface which is destined to couple contactingly with a portion of a plane afforded on the at least one seating and oriented such that a perpendicular thereof does not intersect an axis of the pivot,

• wherein the coupling element is axially mobile internally of a guide, which guide has an axis lying in a perpendicular plane to the axis of the pivot, and
• the coupling element being provided with at least one tooth having an inclined plane destined to couple with a corresponding flat surface afforded on the at least one seating;
• the inclined plane being inclined with respect to the axis of the guide and generating with the axis of the guide a slight tapering of a free end of the at least one tooth destined to couple by insertion thereof in the at least one seating;
• wherein the inclined plane is perpendicular to the portion of plane;
• wherein the free end of the at least one tooth is delimited by a portion of flat surface which is parallel to at least a portion of flat coupling surface;
• wherein the tooth of the coupling element is pushed towards the at least one seating by springs acting parallel to the axis of the guide;
• the device further comprising a linear actuator, predisposed coaxially internally of the guide, which linear actuator commands at least an axial uncoupling movement of the at least one tooth of the coupling element from the at least one seating;
• and wherein the coupling element is fork-shaped, having two of the at least one tooth, which are identical and symmetrically arranged with respect to a plane containing the axis of the guide, the coupling element being perpendicular to the axis of the pivot when coupling is complete.