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Increase the braking effect of wet disc brakes
Falta, Martin ; Ševčík, Miloš (referee) ; Škopán, Miroslav (advisor)
This Master´s thesis deals with construction design of break system of the tractor Zetor Forterra HSX. At the beginning, there is an overview of different possibilities breaking system from other world´s producers of tractors. Afterwards there is constructional working from selection variant of suspension to final project. In this case the thesis contains required calculations of the whole device. Thesis also contains the stress and strain analysis of selected components of construction using a numerical approach of finite element method and drawing documentation of the selected components.
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Variable Intake manifold for 16V Engine
Konečný, Lukáš ; Franz, Rudolf (referee) ; Dundálek, Radim (advisor)
Aim of the diploma thesis is to design intake ducting with variable cross-section for 16V diesel engine consisting from divided intake manifold and divided ejector. Cross-section variability is ensured by a swirl flap placed in the divided ejector. Next aim of thesis is to provide drawing documentation for production of samples. For designing was used PTC Creo system and software GeomCaliper. Also was taken account of manufacturing of the parts with sand-casting, especially to guarantee trouble-free taking out of models from the moulds, and taking out of cores from core moulds, and also for machinability of some elements. Introduction of thesis is focused on diesel engine emissions and ways of their reduction.
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Adjustable Track of Tractor Rear Axle
Šíbl, Michal ; Slezák, Martin (referee) ; Dundálek, Radim (advisor)
This Master´s thesis deals with construction design adjustable track of tractor rear axle in a company Zetor Tractors a.s. At the very beginning there is an overview of different possibilities adjustable track from other world´s producers of tractors. Afterwards there is my constructional working from selection variant of suspension to final project. In this case the thesis contains required calculations of the whole device. Thesis also contains the stress and strain analysis of significant part of construction using a numerical approach of finite element method (FEM) and drawing documentation of the project constructed device.
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Forks for handling logs
Seďa, Marek ; Juřík, Josef (referee) ; Škopán, Miroslav (advisor)
This master’s thesis with product design forks for handling logs as attachments for tractors Zetor Forterra the specified load capacity 1200 kg. The work is mainly focused on the design frame and fork clamps, the necessary calculations and ultimately strength check of designed structures. The work is also addressed in detail the linear hydraulic motor used for the rotational movement of the jaws, including the calculation of fork. Then there are the design calculations and stress analysis of journals. It also checked the stability of the machine. Stress analysis is performed for different load conditions and the jaw frame finite elements. As another part is making all the drawings.
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Common-rail System for 4-cylinder CI-engine
Ošmera, Petr ; Svída, David (referee) ; Dundálek, Radim (advisor)
This diploma thesis with a view to „common rail system for 4-cylinder CI-engine“ deals with the application of modern injection system „common rail“ to already existing compression-ignition tractor engine. The diploma thesis treats of the most necessary adjustments related with the replacement of injection systems which was solved in the way of the minimum adjustments. This kind of solution deals with an economic aspect of the problem. The reconstruction contains the engineering design of development of high pressure components and the suitability of their placing on engine.The primary adjustment of the application of system „common rail“ for existing tractor engine confirmed the possibility of this reconstruction.
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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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Marketingová strategie prodeje traktorů Zetor na tuzemském trhu
Zmeková, Věra
The diploma thesis is about marketing strategy and selling Zetor tractors on domestic market. The aim was to find out the saleability of Zetor tractors in comparison with other imported brands -- New Holland and John Deere. Simultaneously state the position of ZETOR TRACTORS a.s. on domestic market in comparison with its competitors. It is significant that in the long term ZETOR TRACTORS a.s. is focused on manufacturing and selling tractors, which became pretty popular among customers. Due to low production costs there is a profitable ratio between price and performance. On the Czech market, the sales of Zetor tractors show the growing trend. During 2012 -- 2014 ZETOR TRACTORS a.s. increased its market share on domestic market by 10 %. ZETOR TRACTORS a.s. is the only producer of tractors in the Czech republic. The part of this thesis is a research of customer satisfaction with Zetor tractors and its purchase price. Based on customer opinions and the analysis of the financial situation of ZETOR TRACTORS a.s. a set of recommendations was given.
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