Clear end formula shearer cutting units

The utility model discloses a clear end formula shearer cutting units, every cutting units include two cutting drum, and extend to rib (20) through changeover portion casing (3) a cutting drum (14) and the 1st cutting drum transmission chamber casing (6), ledge (18) that the 1st cutting drum transmission chamber casing (6) rear portion extended to scraper conveyor middle part groove and lead-over groove in addition, the 1st cutting drum transmission chamber casing (6) are to the lower part bending simultaneously the utility model discloses a cutting drum have sufficient planted agent volume avoid scraper conveyor aircraft nose tail department' triangle coal' formation, the 2nd cutting drum has less product interval and improves the effect of coalingging, guarantees sufficient load bearing stength, under the same coal mining height, select two less cutting drum of diameter to mate the use, guarantee full-seam extraction, extension cutting drum's life, optimize the cutting units wholeness can, the adaptability that changes thickness of coal seam is good, reduce cost and technological requirement