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Modern Tractor Transmissions
Bartošová, Daniela ; Řehák, Kamil (referee) ; Prokop, Aleš (advisor)
This Bachelor thesis concerns an overview of the modern trends in the area of tractors transmissions. It explains the reason why both the power shifts and the continuously variable transmissions. Further on, this thesis emphasizes the innovative elements of transmission concept at selected tractor manufacturers.
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Modern Tractor Transmissions
Bartošová, Daniela ; Řehák, Kamil (referee) ; Prokop, Aleš (advisor)
This Bachelor thesis concerns an overview of the modern trends in the area of tractors transmissions. It explains the reason why both the power shifts and the continuously variable transmissions. Further on, this thesis emphasizes the innovative elements of transmission concept at selected tractor manufacturers.
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The utilization of the individual gears for tractors higher power series
DRAHOŠ, Pavel
The aim of the bachelor thesis was to monitor the operation of two tractors with different transmission variants with a shift under full load and the group lifting under load, in terms of used gear at different working deployment (stubble, plowing, sowing). First, the literature review describes the historical development, construction and activity currently used tractor transmissions. The following is a description of the methodology of measurement and evaluation, bringing used calculation formula. Custom measurements were performed on tractors John Deere 7810 with transmission Powershift 19/7 and AutoQuad 20/20 and proved that in practise there are only using a few of the many gears installed. For a simple design optimization gears are used total tables extended with graphs for individual transmissions. Based on the measurement and after the data analysis is presented the proposal of transmission with 10 forward gears and 2 reverse gears with a fully stamped gears under load. Current manufactures and the market, however, now offer tractors with mechanical transmissions increasing amount of gears than in the past. Increasingly, the trend is promoting the installation of transmisson with the fluent change of transmission ratio to the current use of advanced contemporary electronic transmission control and engine tractor.
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