Tool assembly interface

An interface structure comprising a first assembly (20) supporting a tool or a tool holder and a second assembly (90) supporting a machining element,

• the first assembly (20) having a cavity (30) with at least one frustro-conical shell or cylindrical section (32) and an abutment surface (24) or contact area which is facing axially in the direction of the second assembly (90), and
• the second assembly (90) having a trunnion (100) with, a cone-, truncated cone- or cylinder-shaped section (120) for abutment on the frustro-conical shell or cylindrical section (32) of the first assembly (20) and with an abutment area (121) which is facing in axial direction toward the first assembly (20) for contacting the abutment surface (24) of the first assembly (20), and
• the interface structure further including, disposed in the cavity (30), a bayonet-like locking structure with bayonet webs (106, 115) provided on the trunnion (100) and
• the first assembly (20) including clamping elements (60) whose front ends abut during clamping the bayonet webs (106, 115) provided on the trunnion (100), the clamping elements being in the form of eccentric screws (60) which are provided each with an eccentric pin (65) and are rotatable between a release and a clamping position within a pivot angle of 180 to 270 angular degrees.