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Alternatives types of hoists
Gröger, Matěj ; Pokorný, Přemysl (referee) ; Malášek, Jiří (advisor)
This bachelor’s thesis focuses on different types of hoists. The introductory part describes the use and function of these lifting devices including the use of suitable types of chains. Following this, the design of a self-locking differential pulley with lifting capacity of 750 kg and lifting height of 9 300 mm is developed. The design includes strength calculations of important parts of the differential pulley. Drawing documentation is attached at the end.
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Differential tackle
Pavliš, Jakub ; Pokorný, Prokop (referee) ; Malášek, Jiří (advisor)
This bachelor´s thesis deals with the proposal and calculation of self-locking differential tackle with hand drive. Maximum lift capacity is 670kg and lift 5,2m. It includes evolution of differential tackles and description of the structure Weston´s differential tackle. Next theoretical calculation and the calculation of chosen construction, which involves the calculation of chain, sprockets, supporting structure and assessment of limits of self-locking. Drawing documentation is included in this thesis.
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Travelling Crab
Mikulec, Roman ; Řezníček, Milan (referee) ; Malášek, Jiří (advisor)
This work deals with the calculation and suggestion of the main parts of the travelling crab for lifting capacity of 45 000 kg. It consists primarily of determining the ropes, pulleys and cable drum and assigning of appropriate engine, brakes, gearbox and clutch. The work also contains strength calculation and suggested dimensions of main parts of sheave block, like the pin hook block, crossbeam, hook nut and rope pulleys, which are delivered with drawing documentation along with drawing of sheave block and piece list.
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Design of lifting gear of bridge crane 8 tonne
Smrčka, Jaroslav ; Pokorný, Přemysl (referee) ; Kubín, Martin (advisor)
This bachelor’s thesis deals with design of lifting gear of 8 tonne bridge’s crane travelling crab. The aim of this bachelor’s thesis is to suggest main characteristics of the crane, such as lift height and lift speed. This thesis deals with choice of cable, hook, electromotor, gearbox and break, diameters of balancing and guide blocks and cable drum including strength calculation. Thesis includes complete design of block and its strength calculation.
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Overhead electric hoist
Hruška, Miroslav ; Malášek, Jiří (referee) ; Škopán, Miroslav (advisor)
The theme of this bachelor’s thesis is overhead electric hoist, designed for lifting capacity 1,500 kg. It produced a technical report containing the calculation and design of electrical drives and lifting travel hoists including control of these drives. There are also carried out appropriate travel gear and travel, clutches, brakes and bearings and strength calculation of ropes and rope drum. Part of this work is to build the entire proposed drawing devices.
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Travelling Crab
Komůrka, Martin ; Pokorný, Přemysl (referee) ; Malášek, Jiří (advisor)
This thesis deals about engineering design and calculation hoisting mechanism of travelling crab for capacity 20 000kg and lift height 36m. For this task are made necessary calculations concerning hoist, crane cable, cable pulleys, cable drum. Further, they are drawn strength calculations pin of pulleys, sidewalls, crossbeam and crane hook. Then is also set a drive part of hoisting mechanism consisting of calculation and choice motor, gearbox and brake. The result of this thesis is drawing documentation of pulley block and manufacturing drawings of individual parts.
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Travelling Crab
Bernard, Vladislav ; Špička, Jiří (referee) ; Malášek, Jiří (advisor)
This work dissert about proposal and calculation hoisting device travelling crab, intended for tonnage 50 000 kg. For this tonnage there're performed pertinent strenght calculations, concerning journal of pullies, side plate, crossbeam and crane hook. Part of work is proposal desirable electric motor, gear - box, brakes, jaw clutch and bearings. In work are also descriptions of hoisting apparatus and descriptions of construction parts of sheave block. Defined are also main dimensions ancillary components for desired hoisting. Work is finished with complete drawing documentation of sheave block travelling crab.
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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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Crane hook block - lifting capacity 25 tons
Šanca, Kristián ; Trčka, Tomáš (referee) ; Malášek, Jiří (advisor)
The crane block is the lower part of the hoist. It is designed to fulfill a load capacity of 25,000 kg, while being safe and as light as possible. The work describes the principle of the hoist. A design solution is chosen in which two ropes are wound on a drum. The calculation of the hoist is in the calculation part, the components of the hoist are further described and calculated, using basic strength calculations. Attached is a drawing of the assembly and important details.
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