Add-on milling unit with cross-cutting heads at an angle to each other and output gears with belevoid toothing

Milling unit attachment comprising:

• a housing with a mounting bracket at the rear end of the milling unit attachment for fastening to a movable carrier arm of a carrier device, wherein the housing extends along a longitudinal axis (01);
• at least one motor (02);
• a transmission unit which is arranged in the housing, is coupled on the drive side to the at least one motor (02) and comprises a drive spur gear (04), the axis of rotation (05) of which runs perpendicular to the longitudinal axis (01) of the housing;
• two transverse cutter heads (06), which are rotationally driven via the transmission unit, and which are mounted on either side of the longitudinal axis (01) of the housing and carry numerous router bits (07), wherein each of the transverse cutter heads (06) has a driven pinion shaft (09), about which the transverse cutter head (06) rotates, wherein the two pinion shafts (09) of the transverse cutter heads (06) are arranged at an angle to each other and respectively form an acute angle with the longitudinal axis (01) of the housing on the side facing away from the mounting bracket;
• wherein an output gear wheel (10) with conical involute gears is mounted on each of the pinion shafts (09), wherein the conical involute gears of each output gear wheel (10) engage directly in an associated section of the spur gearing of the drive spur gear (04), wherein each of the two output gear wheels (10) is provided with an internal gearing which is placed on external gearing of a geared connecting shaft.