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The family of power transmission, which allows obtaining a large number of operating modes and to implement the principle of split transmission of the tractor, is considered. The transmission provides gear shifting without breaking the power flow for all modes of operation and smooth change of gear ratio within each mode of operation the transmission forward stroke. The family of transmissions designed especially for universal and industrial wheel tractors 4 and higher traction grades, as well as traction transport vehicles based on the chassis of such tractors. The basic relationships defining features of the kinematics, power and power balance of the transmission are given. For example, the kinematic scheme of gear box for tractor drawbar 5-8 class that implements 24 mode, shows the principle of operation of the devices belonging to this family.
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Bukashkin et al. (2017) studied this question.
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