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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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Control Systems of Gears Changing on Load in Tractors Gearboxes
Holub, Přemysl ; Svída, David (referee) ; Dundálek, Radim (advisor)
This bachelor thesis is interested in the overview of tractor’s gearboxes, which are changing on load. There are reasons, why it has to be costructed and there are requirements for it. There are also described PowerShifts, which allow us gear changing on load. After basic description of concrete gearbox, there is always some example of using in current tractors. In period named Mechanical gearboxes, wchich are changing partly on load there is more space for Zetor tractors and its gearboxes. In one of the last period there is important part about continuously variable transmissions where the driving speed is regulated steplessly. These gearboxes are considered to be modern technology of transfer engine torque.
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Design of direct shift gearbox
Kocman, František ; Prokop, Aleš (referee) ; Řehák, Kamil (advisor)
This thesis deals with the conceptual design of a dual clutch gearbox and with inspection of selected parts of this gearbox. The introductory part is devoted to their theoretical description and subsequent analysis of current dual clutch gearboxes. Then the work focuses on the conceptual design itself, which is based on the chosen vehicle. On the basis of these inputs, the gearbox gear ratios are chosen, which have impact on the economy of the vehicle operation. With respect to the installation area, its conceptual layout is then proposed. Furthermore, this thesis deals with the basic structural design and calculations of selected functional parts of the transmission. The last part of this thesis is devoted to the inspection of selected structural nodes using the finite element method. This whole thesis describes the individual steps of the basic conceptual design of the dual clutch gearbox and the design of their basic components.
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Design of direct shift gearbox
Kocman, František ; Prokop, Aleš (referee) ; Řehák, Kamil (advisor)
This thesis deals with the conceptual design of a dual clutch gearbox and with inspection of selected parts of this gearbox. The introductory part is devoted to their theoretical description and subsequent analysis of current dual clutch gearboxes. Then the work focuses on the conceptual design itself, which is based on the chosen vehicle. On the basis of these inputs, the gearbox gear ratios are chosen, which have impact on the economy of the vehicle operation. With respect to the installation area, its conceptual layout is then proposed. Furthermore, this thesis deals with the basic structural design and calculations of selected functional parts of the transmission. The last part of this thesis is devoted to the inspection of selected structural nodes using the finite element method. This whole thesis describes the individual steps of the basic conceptual design of the dual clutch gearbox and the design of their basic components.
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Převodová ústrojí traktorů
Nedoma, Jan
The thesis is dedicated to currently used constructions of gear cases. It describes individual types and presents particular gear cases made by particular producers of agriculture machinery. The greatest attention is paid to the differential hydromechanical (fluent) gear case and to the mechanical gear case which is widely spread in practice. In the thesis there is also stated comparison based on various aspects: efficiency, influence on fuel consumption, lifetime, operation convenience, maintenance requirements and acquisition price. Based on findings it is obvious that the gear case powershift is suitable for tractors which carry out tractional work with static tractional load. On the contrary the differential hydromechanical gear case achieves better values at changing load, for example in traffic.
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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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