FIELD: engines and pumps.
SUBSTANCE: invention relates to multi-speed planetary gearbox, mainly, to the working machine extra gearbox. Gearbox housing (1) houses four planetary rows (4-7), several shafts and gearshift elements. The latter are composed of at least one brake and clutches. The latter are purposefully actuated by selected various gear ratios between the drive shaft (2) and drive shaft (3). Drive shaft (2) is engaged with the second planetary row carrier (5). Sun gear of said shaft is engaged with the third shaft (14) while crown gear is engaged with the fourth shaft (15). Drive shaft (3) is engaged with the fourth planetary row carrier (7). Fifth shaft (16) is engaged via the first brake (8) the housing (1).
EFFECT: increased number of gear ratios, simplified design.
14 cl, 18 dwg
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