Laboratory-experimental verification of calculation of force effects in tractor's three-point hitch acting on driving wheels

Porteš, Petr; Bauer, František; Čupera, Jiří

doi:10.1016/j.still.2012.10.007

Cited by 24 publications

(13 citation statements)

References 10 publications

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“…Modern tractors have high universality and they feature with a range of additional attachment. Currently manufactured tractors are equipped with three-point hitch regulation (Žikla et al 2005a,b, 2007Turza, Kopiláková 2011;Porteš et al 2013), and as the authors introduce in their papers (Žikla et al 2006;Tkáč et al 2007;Burg et al 2012), tractor manufacturers use the electrohydraulic regulation of threepoint linkage also in tractors of lower power classes. All the devices which these tractors are equipped with offer wider utilisation of the tractor and greatly facilitate its operation.…”

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confidence: 99%

“…These trials have to be carried out by an organisation independent of tractor manufacturers due to the ob-jectivity of independent assessment of a tested tractor. For this purpose, a specially designed laboratory device was used to observe the operational conditions of the machine (Brdarić et al 2009;Turza, Kopiláková 2011;Burg et al 2012;Máchal 2013, Porteš et al 2013Tkáč et al 2014). The increase of technological parameters causes considerable wearing of components and also decrease of their durability (Kučera, Rousek 2003;Drabant et al 2010;Turza, Kopiláková 2011;Majdan et al 2012).…”

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confidence: 99%

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Monitoring of operation loading of three-point linkage during ploughing

Hujo¹,

Tkáč²,

Tulík³

et al. 2016

Res. Agric. Eng.

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Hujo Ľ., Tkáč Z., Tulík J., Kosiba J., Uhrinová D., Jánošová M. (2016): Monitoring of operation loading of three-point linkage during ploughing. Res. Agr. Eng., 62: 24-29.The research was focused on operational measurements of tractor plough tools and their subsequent utilisation and simulation under laboratory conditions by a hydrostatic simulator. In this field, theoretical and experimental works were focused on tractors, whereby the proposal of laboratory test arose out of the loading characteristics of the three-point linkage of the tractor. These characteristics were obtained from the agricultural tractor's operation in plough aggregation. Measurements were performed with the following tools: tractor with carrier-mounted four-mouldboard plough PH1-435 and tractor with Kuhn plough manufactured by. The subject of these measurements was to obtain the time courses of forces and pressures in the hydraulic system of the three-point linkage during ploughing with carrier-mounted and semi-mounted ploughs. For objective comparison of the obtained results during experimental measurements, we determined the characteristics of measurement conditions focused on physical and mechanical properties of the soil -bulk density, moisture, penetrometer resistance and slide strength of the soil.

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confidence: 99%

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confidence: 99%

Monitoring of operation loading of three-point linkage during ploughing

Hujo¹,

Tkáč²,

Tulík³

et al. 2016

Res. Agric. Eng.

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“…This equipment serves for measuring of forces generated from attached implements (H. F. Al-Jalil et al, 2001). Based on this, forces acting on driving wheels may be evaluated (P. Portes, 2013). For dra and speed measuring, portable instrumentation systems could be also used (N. P. Thompson and K. J. Shimmers, 1989).…”

Section: Discussionmentioning

confidence: 99%

Draft Sensor Loading Analysis

Slimařík¹,

Sedlák²,

Dostál³

2014

Acta Univ. Agric. Silvic. Mendelianae Brun.

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This article deals with loading analysis of dra sensor which is used in nowadays tractor as standard. Directional sensitivity and response to the loading force of dra sensor behavior are the main goal of this work. For this purpose special measuring chain was developed. Experiment was realized with ZETOR 130 HSX which uses BOSCH dra sensors as a source for force sensing. Applied loading was measured with calibrated load cell located in measuring chain between dra sensor and ratchet mechanism. In total, three positions of lower arms were examined. Maximum loading force reached value of 30 kN. This was limited by ratchet mechanism regulations. Each confi guration represents diff erent loading conditions on dra sensor. The measured load curves were compared to each other for clarifying of dra sensor directional dependency. The obtained information's about dra sensor are summarized in the end of the text. The results achieved from realized measurement shows force dependence on the output voltage of dra sensor.

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“…Inappropriate coupling o en causes increase in wheel slip and undesirable load transfer which estuary unsuitable weight distribution. This adjustment aff ects not only the fi eld performance, but also soil compaction due to load transfer from tractor tilt and force resultant from ploughing directly on wheel load (Portes et al, 2013). Wheel slippage increase leads to loss in traction power causing hectare performance loss.…”

Section: Introductionmentioning

confidence: 99%

Static Testing of Draft Sensor for Three Point Hitch Dynamometer Utilization

Slimařík¹,

Dostál²,

Polcar³

2015

Acta Univ. Agric. Silvic. Mendelianae Brun.

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This paper investigates the possibilities in design of universal three point hitch dynamometer. Approaches in diff erent hitch dynamometers are explained and pros and cons are mentioned. Also main parts and functional principle of dra sensor are clarifi ed. The main goal of this research is clarifi cation and examination of dra sensor output signal on angular dra force dependences. Utilization of dra sensor as a source for dra force sensing in lower arms is intended and examined. Research was focused on loading of dra sensor in diff erent directions for proper screening of voltage output. Special loading device was designed and used with respect of real mounting conditions and force loading identically to bearing pins of tractor hitch lower arms. With usage of calibrated load cell and National instrument sensing control unit stage loading diagram of dra sensor was obtained. Results show basic feedback of voltage output on force load angle variation. In non-load condition, voltage output fl uctuates around 5 V. In the main direction of dra force application voltage drop occurs from 5 V up to 3.16 V. Reverse direction of loading brings the voltage output increment from 5 V up to 7.06 V. When the load is applied with angular inclination voltage output changes are diminished up to 90° and dra sensor shows voltage output symmetry against the main axis. Based on stage loading diagram the appropriateness of dra sensor usage in design of universal three point hitch dynamometer is discussed in paper summary. Also further research opportunities and results application are suggested.

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Laboratory-experimental verification of calculation of force effects in tractor's three-point hitch acting on driving wheels

Cited by 24 publications

References 10 publications

Monitoring of operation loading of three-point linkage during ploughing

Monitoring of operation loading of three-point linkage during ploughing

Draft Sensor Loading Analysis

Static Testing of Draft Sensor for Three Point Hitch Dynamometer Utilization

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