The dissertation deals with influence of machines and machine sets on unwanted soil compaction in agriculture production. In the literary part, the thesis deals with soil problems, current state of agricultural technology and its decisive parts in relation to the soil, physical properties of soil and penetrometry. The goal of the dissertation is to evaluate interactions of impact of tractor or combine harvester crossings on soil compaction. The effect of tractor and combine harvester crossings was measured by the degree of soil compaction by penetrometer resistance of the soil. At the same time, the physical properties of the soil were monitored by using the method of Kopecký roller analysis. In the field-laboratory measurement of soil compaction was used tractor with different loads, different tire pressure and dual tyres on rear axle. The influence of the first crossing, repeated crossings and no crossing was assessed. The results of the measurements confirm suitability of using modern tires which are able to work with lower inflation pressures, have a flexible sidewall and can be mount as dual or triple tyres.

The thesis gives the reader a comprehensive overview of the construction of agricultural tractors with regard to their use in transport and their economic evaluation. The theoretical part deals with the construction of modern tractor and homologation for the road traffic. The conclusion of this thesis is dedicated to the practical measurement of the tractor set in transport with respect to the maximum speed of 50 km.h-1, 40 km.h-1 and 40 km.h-1 at the reduced engine speed.

The diploma thesis on the theme Analysis of the Output Parameters of Tractors Kit for Soil Preparation contains in theoretical part actual survey of most important parts of the tractors. The diploma thesis further includes description of tractors CLAAS ARION 640 with mechanical speed gearbox HEXASHIFT and continuous hydrostatic gearbox CMATIC and description of plow PÖTTINGER servo 45S NP, which were all together elements of the practical part. The field measurement took place in Jiřice at Miroslav on Znojemsko in august 2016. This measurement is processed in the practical part, which focuses on comparing tensile characteristics of both gearboxes and determining their influence on the tensile properties of the tractor. Results were tabular and graphically elaborated and the analysis of measured values was performed.

<p>Tractors of today come equipped with a CAN-system. A CAN-system sends information from sensors to electronic control units who process the signals. The sensors measure several interesting parameters such as force, pressure and speed for various components of the tractor. This thesis discuss a force sensor which is placed in the pivot of the tractors three point linkage, the sensor measure the horizontal reaction force from the load that the tractor is exposed to. Signals from this sensor can be used to measure the force from any implement that the tractor is exposed to during an operation. The results from this thesis can be used for research purposes, for example, to compare implements from different manufacturer or to optimize the implement settings during an operation. However, there is a problem that this thesis aimed to solve by developing a method which can be put into practice. When a constant force from an implement is acting on the three point linkage, the reaction force in the pivot of the three point linkage (where the force sensor is attached) is going to vary depending on the angel of the lower lift arm. It is not uncommon that the angel of the lower lift arm is varying, because different implement and soil require different settings on the linkage. This means that the force which is measured by the sensor may vary in size even though the actual force does not vary. To solve this problem, theoretical calculations have been performed and equations to describe the variation of the reaction force depending on the geometry have been created. The theory has also been verified by a finite element analysis and a practical verification test. The conclusions from these three parts correspond to each other. Theoretically that means by knowing the horizontal reaction force (measured by the force sensor) and the angles of the geometry on the three point linkage (can be measured with a position sensor) you can calculate the force an implement influence the tractor with. However, there is a problem which prevents this method from being completely reliable. It is only working when the impact force is completely parallel to the horizontal plane. Since many implements are being pulled to the soil (plow, cultivator, etc.) in practice there are also vertical forces affecting the tractor. This is no problem to solve in theory, but in practice this method does not compensate for the vertical force. This vertical force should be examined more carefully before the method can be used reliably in full scale.</p>

Tractors of today come equipped with a CAN-system. A CAN-system sends information from sensors to electronic control units who process the signals. The sensors measure several interesting parameters such as force, pressure and speed for various components of the tractor. This thesis discuss a force sensor which is placed in the pivot of the tractors three point linkage, the sensor measure the horizontal reaction force from the load that the tractor is exposed to. Signals from this sensor can be used to measure the force from any implement that the tractor is exposed to during an operation. The results from this thesis can be used for research purposes, for example, to compare implements from different manufacturer or to optimize the implement settings during an operation. However, there is a problem that this thesis aimed to solve by developing a method which can be put into practice. When a constant force from an implement is acting on the three point linkage, the reaction force in the pivot of the three point linkage (where the force sensor is attached) is going to vary depending on the angel of the lower lift arm. It is not uncommon that the angel of the lower lift arm is varying, because different implement and soil require different settings on the linkage. This means that the force which is measured by the sensor may vary in size even though the actual force does not vary. To solve this problem, theoretical calculations have been performed and equations to describe the variation of the reaction force depending on the geometry have been created. The theory has also been verified by a finite element analysis and a practical verification test. The conclusions from these three parts correspond to each other. Theoretically that means by knowing the horizontal reaction force (measured by the force sensor) and the angles of the geometry on the three point linkage (can be measured with a position sensor) you can calculate the force an implement influence the tractor with. However, there is a problem which prevents this method from being completely reliable. It is only working when the impact force is completely parallel to the horizontal plane. Since many implements are being pulled to the soil (plow, cultivator, etc.) in practice there are also vertical forces affecting the tractor. This is no problem to solve in theory, but in practice this method does not compensate for the vertical force. This vertical force should be examined more carefully before the method can be used reliably in full scale.

The aim of this diploma thesis was determination of tractor engines oil drain interval. In theoretical chapters is described theoretical background of the field of engines lubrication and issue of use of motor oils in practice. The drain intervals were determined using a tribotechnical diagnosis of collected samples of a motor oil from tractors. The analysis of the samples were processed in a laboratory and the dominant parameters that influence the wear of the oil were detected. On the basis of the application of a trend analysis were determined the reference values of the levels of oil degradation. After taking the evaluation and discussion of the results were defined oil drain intervals for the tractors. At the end there was made an evaluation of the results and operational recommendations. The thesis includes also an economical evaluation.

This diploma thesis deal with evaluation of the current method of harvesting production on property of Společný les Peklo and Obecní lesy Olešnice v Orlických horách represented by motomanual harvesting and binding concentration of wood. As alternative to current mode, I chose harvesting production performed by harvestor node. In the theoretical part of work, harvesting-transporting process, basic construction parameters of harvestor technologies, the performance standards used in forestry management and also estates of interest are described. In the practical part, common comparison of technologies using SWOT analysis and performance standards including wage rate and practical comparison of technologies on specific property are performed.

No description available.

This diploma thesis deals with the determination of the radius of rotation in selected articulated tractors. Describes the use and construction of tractors and their parts. The first part deals with the problems of tractors and the second is aimed at comparing the turning radius of three types of articulated tractors in the operation of agricultural primary production.

The master thesis is about design and optimization of tractor front drive axle console. The first part, include the design of the new console geometry with respect of the surrounding area. After that is on the newly designed part performed a strain-stress analysis for three selected operating modes of the tractor, which have been defined based on critical operating situations. In thanks of the results of the individual states, the geometry of the component is adjusted according to meet the fatigue failure limit state. After inclusion of critical site modifications, the console design was subjected to design optimization in the ANSYS Workbench program to reduce the amount of material by 10%. The end of the work, is carried out the evaluation of these places and then the console control calculation.