Blow bar

A blow bar configured for insertion in a blow bar holder of a rotor of an impact crusher, said blow bar defining a Cartesian coordinate system with a longitudinal axis, which runs in a z-direction, and configured to be rotationally symmetrical with respect to the longitudinal axis and to extend in axially parallel relationship to the blow bar holder when inserted in the blow bar holder, a vertical axis which runs in a y-direction within the Cartesian coordinate system and is directed toward a radially outer top surface of the blow bar, and a transverse axis which runs in a x-direction within the Cartesian coordinate system and is directed toward a longitudinal side of the blow bar, said blow bar comprising:

• upper and lower ends in vertically spaced-apart relationship;
• and
• two heads having each a rectangular cross section and being spaced apart to define there between a middle region in which the longitudinal axis centrally determines a position of a y-z plane, wherein one head is arranged at the upper end and another head is arranged at the lower end, each head having a front side surface and a rear side surface disposed on a long side and extending parallel to the y-z plane at a first spacing, so that the head has a thickness between the side surfaces, with the two heads situated offset to the y-z plane in an opposite direction by a second spacing in the transverse direction, thereby forming support shoulders in a transition to the middle region, said middle region having a thickness over a majority portion of its length, which thickness is not less than the first spacing between the front and rear side surfaces of the heads, with each support shoulder extending in the x-direction beyond the rear side surface and beyond the front side surface, and with a contact surface being situated between the middle region and the rear side surfaces of the two heads and raised in regard to the rear side surface, wherein the support shoulders form flanks of longitudinal webs, with the longitudinal webs being raised in regard to the front side surfaces and being trapezoidal in cross section.

A blow bar configured for insertion in a blow bar holder of a rotor of an impact crusher, said blow bar defining a Cartesian coordinate system with a longitudinal axis, which runs in a z-direction, and configured to be rotationally symmetrical with respect to the longitudinal axis and to extend in axially parallel relationship to the blow bar holder when inserted in the blow bar holder, a vertical axis which runs in a y-direction within the Cartesian coordinate system and is directed toward a radially outer top surface of the blow bar, and a transverse axis which runs in a x-direction within the Cartesian coordinate system and is directed toward a longitudinal side of the blow bar, said blow bar comprising:

• upper and lower ends in vertically spaced-apart relationship;
• and
• two heads having each a rectangular cross section and being spaced apart to define there between a middle region in which the longitudinal axis centrally determines a position of a y-z plane, wherein one head is arranged at the upper end and another head is arranged at the lower end, each head having a front side surface and a rear side surface disposed on a long side and extending parallel to the y-z plane at a first spacing, so that the head has a thickness between the side surfaces, with the two heads situated offset to the y-z plane in an opposite direction by a second spacing in the transverse direction, thereby forming support shoulders in a transition to the middle region, said middle region having a thickness over a majority portion of its length, which thickness is not less than the first spacing between the front and rear side surfaces of the heads, with each support shoulder extending in the x-direction beyond the rear side surface and beyond the front side surface, and with a contact surface being situated between the middle region and the rear side surfaces of the two heads and raised in regard to the rear side surface, wherein the front side surface has a recess to hold an axial securing, said recess situated opposite the contact surface, so that the thickness of the middle region in an area of the recess is not less than the thickness of the heads.