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Overview of continues variable transmission design
Fryčar, Michal ; Dočkal, Kryštof (referee) ; Šperka, Petr (advisor)
Friction variators are used in many industries mainly for their ability to continuously change the engine-to-output gear ratio while machine is running. In this paper, six types of construction were described (using a belt, chain, ball or toroidal, conical and disc wheel). Their properties were then compared based on the maximum transmitted power and transmission efficiency. The results calculated using Hertz's theories shows, that belt, chain and toroidal constructions are transmitting the highest amount of maximum torque. These results are in accordance to earlier studies in this field and they are intended to serve as a source of information for further research on topic.
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Differential tackle
Poliak, Daniel ; Pokorný, Přemysl (referee) ; Malášek, Jiří (advisor)
This bachelor thesis deals with the design and strength calculation of the differential hoist. The chain block is self-locking with a load capacity of 400 kg and a lifting height of 4750 mm. The design is projected with safety consideration to the flexibility limit state. The project also includes computational report and drawing documentation.
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Design of gearbox for electric motorcycle
Novotný, Tomáš ; Prokop, Aleš (referee) ; Svída, David (advisor)
The aim of the thesis is a summarization of current state of knowledge of motorcycle clutches and transmissions and subsequent design of clutch and transmission for electric powered motorcycle. The main topic is design of the clutch of which components were processed by stress analysis and designed for fatigue safety. On top of that, the thesis deals with the design of primary transmission and gear ratios.
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Stroke mechanism of bridge crane
Tomeš, Jakub ; Sedláček, Martin (referee) ; Škopán, Miroslav (advisor)
The bachelor thesis deals with the design of bridge crane lifting gear for a load not exceeding 10,000 kg. The work includes the design of the basic parts of the lifting gear, such as rope diameter, rope drum and rollers. There is also included the choice of standardized parts such as electric motor, crane gearbox, flexible clutch or drum brake. The last chapter describe the strength calculation of the rope drum and the bearing life calculation together with the design of welds and tight pen. The output of the bachelor thesis is the drawings of the cable drum weld and the mechanism of the lifting mechanism.
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Differential tackle
Mikunda, Luboš ; Jonák, Martin (referee) ; Malášek, Jiří (advisor)
The work deals with the differential tackle for 900 kg capacity and 9.5 m lift Includes selection of parts fixed and free blocks, option chains, pulleys and other functional parts. Further stress analysis of pins sprockets, side panels and hook the free blocks, drawing-based assembly and important detailů.Práce calculation includes the assessment of self-locking limit.
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Vliv konstrukce převodovky na ztráty u osobních automobilů
Rozlivka, Jakub
This diploma thesis deals with the influence of gearbox design on passive losses of passenger cars. First chapters are focused on theory of construction of transmission and determination of vehicle resistance opposing its movement. Experimental work concerns measurement on chassis dynamometer and brings comparison of obtained values. The last chapter analyzes financial issues of different design of gearboxes installed in identical cars.
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Cyclic Engine Visualization
Fajkus, Jan ; Navrátil, Jan (referee) ; Přibyl, Jaroslav (advisor)
This Master's thesis deals with application design and implementation. Application is designed for composition of gears. It is built as a simple computer game. It also contains 3D model renderer, which shows the movement of gears in gearbox. Program is implemented in C language using OpenGL library.
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Tackles
Stanec, Stanislav ; Pokorný, Přemysl (referee) ; Malášek, Jiří (advisor)
The first part of the bachelor‘s thesis contains background research of constructions and the basic calculations of the tackles. In the second part there is worked out a design and calculation the tackle of Archimedes on the basis of the suitably chosen parameters. Drawing documentation is attached to this thesis.
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Differential tackle
Valach, Petr ; Pokorný, Přemysl (referee) ; Malášek, Jiří (advisor)
This bachelor’s thesis deals with the calculation and construction proposal of self-locking differential tackle with lifting capacity of 600 kg and lift of 3.7 m. After a short division of tackles according to various criteria and their description is followed by a more detailed description of the chosen construction of the differential tackle. The thesis includes the calculation of the sprockets according to the relevant norm, the choice of the chain, bearing selection, assessment limits and safety self-locking and important strength calculations taking into account the manual manipulation. There is the drawing documentation according to the topic of the bachelor’s thesis.
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Longitudinal dynamics of cars
Porteš, Petr ; Fojtášek, Jan (referee) ; Zháňal, Lubor (advisor)
Aim of this thesis is to find optimum gear ratios for completing one lap in formula-type racing car in minimum possible time. Thesis is divided into two parts – theoretical and practical. In the first part basic knowledge of longitudinal dynamics of racing cars is summarized, in the second part gear ratio optimization algorithm created in MATLAB is presented.
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