|
|
Analysis of extensions for mounting a harvester head on an excavator
Popela, Dominik ; Struhal, Vít (referee) ; Mergl, Václav (advisor)
The introduction of the thesis deals with a complete research of individual components that need to be mounted on an excavator to make it possible to use it for forest harvest. An integral part of the research is a detailed market research, thanks to which various designs of manufactured attachments were analyzed. The research part is followed by a description of the selected components of the assembly, which form an excavator attachment for its use in forest harvest. The following chapter already describes the author's own designs of the extensions design in three variants. The key part of the thesis is dedicated to dynamic simulation of the harvesting process and strength simulations of the designed extensions. Using dynamic simulation, the course of the force effects acting on the attachment pin, which arise during the process of felling a tree, was determined. The maximum force effects were determined from the results of the dynamic simulation, which were then applied in the strength analysis. The finite element method was chosen for the calculation of the strength analysis. The final form of the individual design variants of the extensions arose from the performed strength analyses. The conclusion of the thesis evaluates the achieved results and a detailed comparison of the created design variants of the extensions.
|
|
|
Harvester
Brychta, Vojtěch ; Kašpárek, Jaroslav (referee) ; Škopán, Miroslav (advisor)
Content of this bachelor’s thesis is critical research of harvesters, especially designed for the thinning felling. According to bigger amount of the wheel harvesters in comparison with the tracked harvesters in the Czech Republic, is this work focused on the machines with the wheeled chassis. In the beginning of this work is discussed division of harvesters, second chapter is about construction. Next parts are focused on current conceptual solutions, comparison of machines, including comparison of the harvester heads and energy wood heads. In the conclusion is mentioned supposed development of wheeled harvesters.
|
|
|
Handling equipment for forestry
Martinec, Patrik ; Pokorný, Přemysl (referee) ; Hloušek, David (advisor)
This bachelor thesis is focused on a research treatise on a forest fleet. The beginning of the work outlines the historical development of machines in the woodworking industry, it also deals with harvesters and their individual division according to specifications. The work also focuses on important parts of the harvester such as the hydraulic crane and harvester head. In the same spirit of comparison and division, export tractors are developed in the work. The chapter of the last work summarizes wheel loaders and their use in the woodworking industry. At the end of the thesis, the individual goals and outputs of the bachelor's thesis are evaluated.
|
|
|
Model ranges analysis of forest harvesters
Dlužanský, Tomáš ; Pokorný, Přemysl (referee) ; Kašpárek, Jaroslav (advisor)
In the bachelor’s thesis is made the basic division of harvesters according to types of chassis, technology process of trees and sizes of harvesters. The next point of thesis is about construction of harvesters and about mechanical parts, especially harvester heads. In the next part division of some operational and technical arguments of Czech machines and foreign machines is made. There was critical classification of machines in groups, on the basis of these arguments. Critique was oriented mainly on wheel harvesters. This group was chosen because of its biggest representation in Czech Republic. Some structural specialities of harvesters and progress of harvester‘s technique were presented.
|
|
|
Handling equipment for forestry
Martinec, Patrik ; Pokorný, Přemysl (referee) ; Hloušek, David (advisor)
This bachelor thesis is focused on a research treatise on a forest fleet. The beginning of the work outlines the historical development of machines in the woodworking industry, it also deals with harvesters and their individual division according to specifications. The work also focuses on important parts of the harvester such as the hydraulic crane and harvester head. In the same spirit of comparison and division, export tractors are developed in the work. The chapter of the last work summarizes wheel loaders and their use in the woodworking industry. At the end of the thesis, the individual goals and outputs of the bachelor's thesis are evaluated.
|
|
|
Harvester
Brychta, Vojtěch ; Kašpárek, Jaroslav (referee) ; Škopán, Miroslav (advisor)
Content of this bachelor’s thesis is critical research of harvesters, especially designed for the thinning felling. According to bigger amount of the wheel harvesters in comparison with the tracked harvesters in the Czech Republic, is this work focused on the machines with the wheeled chassis. In the beginning of this work is discussed division of harvesters, second chapter is about construction. Next parts are focused on current conceptual solutions, comparison of machines, including comparison of the harvester heads and energy wood heads. In the conclusion is mentioned supposed development of wheeled harvesters.
|
|
|
Model ranges analysis of forest harvesters
Dlužanský, Tomáš ; Pokorný, Přemysl (referee) ; Kašpárek, Jaroslav (advisor)
In the bachelor’s thesis is made the basic division of harvesters according to types of chassis, technology process of trees and sizes of harvesters. The next point of thesis is about construction of harvesters and about mechanical parts, especially harvester heads. In the next part division of some operational and technical arguments of Czech machines and foreign machines is made. There was critical classification of machines in groups, on the basis of these arguments. Critique was oriented mainly on wheel harvesters. This group was chosen because of its biggest representation in Czech Republic. Some structural specialities of harvesters and progress of harvester‘s technique were presented.
|
guest ::
