Patent ID: 6332582
Filing Date: 2001-12-25
Classification: B02C

Abstract:
A self-propelled crushing machine in which a rotary crusher and a rotary tub for introducing a material to be crushed, thrown from an outer portion to the rotary crusher, are provided on a self-propelled truck, and the material to be crushed, which is introduced from the rotary tub, is crushed by the rotary crusher and freely discharged to the outer portion, said self-propelled crushing machine comprising:target crushing rotational speed setting means for independently and selectively setting a target crushing rotational speed (Nhm) of said rotary crusher so as to obtain a desired grain size of the crushed material;actual crushing rotational speed detecting means for detecting an actual crushing rotational speed (Nh) of the rotary crusher;crusher drive means for setting the rotary crusher to be freely rotated; andcontrol means for inputting a target crushing rotational speed (Nhm) from said target crushing rotational speed setting means, inputting the actual crushing rotational speed (Nh) from said actual crushing rotational speed detecting means, comparing the target speed (Nhm) with the actual speed (Nh), and outputting a crushing rotation control signal (Nhn) for maintaining a relation Nh-Nhm=0 to the crusher drive means.