Impact crusher

An impact crusher for mineral material, comprising:

• a crusher housing, said crusher housing having an upper-side entry opening for the mineral material to be comminuted;
• a reversible rotor defining a horizontal rotation axis and configured for propelling mineral material against wear members in the crusher housing;
• a drive for driving the rotor;
• an impact mechanism delimiting an impact-grinding space for accommodating the rotor, said impact mechanism being adjustable relative to the crusher housing and relative to the rotor,
• an adjustment installation configured to set a spacing of the impact mechanism from the rotor;
• and
• an upper impact space adjoining a top of the impact-grinding space, said upper impact space having an upper height region that is below the upper-side entry opening of the crusher housing, a central height region that adjoins the upper height region, and a lower height region that is contiguous to a lower impact-grinding space, with each of the upper, central and lower height regions being defined by a horizontally measured internal width,
• wherein the central height region is a region having a largest internal width and at a widest location thereof, which is above a crushing circle of the rotor, has a maximum width which is larger than a diameter of the crushing circle of the rotor,
• wherein the adjustment installation includes an upper impact arm adjustment with bearing points linearly displaceable in a horizontal direction guided in gate guides for adapting a width of the upper impact space and a width of the upper-side entry opening of the crusher housing to a maximum charge size of the mineral material to be comminuted, and a lower impact arm adjustment for adjusting a spacing of the wear members in the lower impact-grinding space to a crushing circle of the rotor, and
• wherein the impact mechanism includes impact arms which extend into the upper impact space such that a width of the impact-grinding space is adjustable conjointly with the width of the upper impact space.