Rotor part of an impact mill

1 . A rotor part of an impact mill, wherein the rotor part comprising a plurality of rotor tool blades that can be detachably attached to a blade attachment plate, wherein each rotor tool blade can be detachably attached to an allocated blade position with a blade holder, and the entire rotor part is configured to be rotatably mounted around a longitudinal axis by means of a rotor part attachment sleeve attached to a drive in an impact mill housing at a defined radial distance to a stator part with a plurality of stator tools,

wherein a spacer recess is recessed into each rotor tool blade, a blade holding recess and a plate spacer recess is recessed into blade attachment plate at each blade position, and a spacer per rotor tool blade can be rotatably mounted in the spacer recess and fixed in the plate spacer recess,

wherein a circumferential impact bead is arranged at the upper edge of the spacer, and each blade holder fixes a rotor tool blade to the blade attachment plate, and hence interacts with the spacer to prevent a movement by the rotor tool blade parallel and perpendicular to the longitudinal axis.

2 . The rotor part according to claim 1 , wherein the blade holder is a blade holder plate, which holds the rotor tool blade on the blade fastening plate by means of a blade holder attachment.

3 . The rotor part according to claim 2 , wherein the blade holder plate is linearly displaceable, on the tool side has a blade receiving recess as a gap facing the rotor tool blade, and the blade holder attachment is arranged in an oblong displacement hole in the blade attachment plate.

4 . The rotor part according to claim 3 , wherein a recess impact bead is at least partially circumferentially arranged on a side of the plate spacer recess.

5 . The rotor part according to claim 1 , wherein several recesses varying in depth are recessed along a circumference of the spacer, parallel to the longitudinal axis of the spacer.

6 . The rotor part according to claim 4 , wherein at least two recesses are recessed with two different depths so as to completely cross the spacer in a longitudinal direction.

7 . The rotor part according to claim 4 , wherein markings assignable to the recesses are configured to be printed, lasered or embossed onto at least one face of the spacer.

8 . An impact mill comprising an impact mill housing and a cylindrical impact mill housing wall, on whose inner surface a circumferential stator part with a plurality of stator tools is arranged, and at least one rotor part according to claim 1 is rotatably arranged.

9 . A method for adjusting the distance between a rotor tool blade detachably attached to a blade attachment plate of a rotor part of an impact mill relative to a stator part fixedly arranged on an inner surface of an impact mill housing or stator tools of the stator part, the method comprising:

I detaching a blade holder from the rotor tool blade,

II lifting up the rotor tool blade with a spacer out of a blade holding recess and a plate spacer recess in the blade attachment plate, and then

III rotating the spacer, so that another recess of the spacer faces toward the side lying opposite the tip of the rotor tool blade, and the rotor tool blade with the spacer is thereby held indirectly and introduced back into the blade holding recess and the plate spacer recess, and again fixed to the blade attachment plate by means of the blade holder.

10 . The method according to claim 9 , wherein the blade holder is a blade holder plate that can be fixed by means of a blade holder attachment, so that the rotor tool blade is exposed in step I by linearly displacing the blade holding plate parallel to the center of the blade attachment plate with the blade holder attachment previously having been detached or not manipulated, and the rotor tool blade is fixed to the blade attachment plate in step III by sliding back the blade holder plate.