EP3713672

• Keestrack N.V.since Aug 28, 2020

The invention relates to a beater arm for use in an axially parallel beater arm holder (7) of a rotor (1) of an impact crusher, comprising the following features: a) the beater arm (6) has a longitudinal axis running in the Z-direction within a Cartesian coordinates system, which runs parallel to the beater arm holder (7) in the installation position, a vertical axis running in the Y-direction, which is directed towards a radially outer top surface (8) of the beater arm (6), and a transverse axis running in the X-direction, which is directed towards a longitudinal side of the beater arm (6); b) the beater arm (6) is designed to be rotationally symmetrical in relation to the longitudinal axis; c) the beater arm (6) has a respective head (11) - with a rectangular cross-section - at the upper and lower ends in the vertical direction thereof, wherein each head (11) has lateral surfaces (9, 10) on the longitudinal side, which each run parallel at a first distance (A1) to one another, such that the head has a thickness (D1) between the lateral surfaces (9, 10); d) there is a central region (12) between the two heads (11) in which the longitudinal axis centrally determines the position of a Y-Z plane; e) the lateral surfaces (9, 10) run parallel to the Y-Z plane, wherein, in the transverse direction, the two heads (11) are arranged offset to the Y-Z plane by a second distance (A2) in the opposite direction, such that support shoulders (22) are arranged in the transition to the central region (12); f) the central region (12) has a thickness (D2) over the majority portion of its length that is not smaller than the first distance (A1) of the lateral surfaces (9, 10) of the heads (11).

From the international application WO2019101351