The invention relates to the field of agricultural engineering, in particular to the threshing drum drive gear reducer Harvester. Reducer drive the combine threshing drum mounted between the pulley belt transmission (1) and the threshing drum (2). The gearbox includes disposed on shafts (3, 6) two pairs of gear pinions (4, 5, 7, 8), one of which is in constant mesh. The driven gear is formed integrally with the output shaft of a pinion shaft (8) with an internal toothing (9). Pinion (4) located on the input shaft (3) gear, mounted for axial movement. The input shaft (3) is provided with a splined gear portions, of which the extreme performed with reduced tooth thickness, forming spline locks. The gearbox (2) is provided with stops (11) of the axial displacement and pinion gear mechanism. The technical result is to increase the reliability of the gear drive threshing drum. 2 ill.
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