Technical project for hop cutting equipment in low trellis system

• Published in: Engineering for Rural Development (Latvia) no. 10/2011; pp. 32 - 36
• Main Authors: Hoffmann, D., Czech Univ. of Life Sciences, Prague (Czech Republic), Rybka, A., Czech Univ. of Life Sciences, Prague (Czech Republic), Hermanek, P., Czech Univ. of Life Sciences, Prague (Czech Republic), Honzik, I., Czech Univ. of Life Sciences, Prague (Czech Republic)
• Format: Journal Article
• Language: English
• Published: Jelgava (Latvia) Latvia University of Agriculture 2011
• Subjects: CUTTING IMPLEMENTS; CZECH REPUBLIC; ESPALDERAS; ESPALIER POUR PALISSAGE; HERRAMIENTAS PARA CORTAR; HOPS; HOUBLON; http://www.fao.org/aos/agrovoc#c_11596; http://www.fao.org/aos/agrovoc#c_12103; http://www.fao.org/aos/agrovoc#c_2047; http://www.fao.org/aos/agrovoc#c_27028; http://www.fao.org/aos/agrovoc#c_33095; http://www.fao.org/aos/agrovoc#c_3715; http://www.fao.org/aos/agrovoc#c_6274; http://www.fao.org/aos/agrovoc#c_6513; http://www.fao.org/aos/agrovoc#c_7445; HYDRAULIC SYSTEMS; INVESTIGACION; LATVIA; LETONIA; LETTONIE; LUPULO; MATERIEL DE DECOUPAGE; PODA; PRUNING; RECHERCHE; REPUBLICA CHECA; REPUBLIQUE TCHEQUE; RESISTANCE MECANIQUE; RESISTENCIA MECANICA; SISTEMAS HIDRAULICOS; STRENGTH; SYSTEME HYDRAULIQUE; TAILLE; TRELLISES
• ISSN: 1691-3043

Hop pruning is the main spring agrotechnical operation. That is the reason why great emphasis is placed on exact timing of hop pruning operation and on the use of suitable machinery. Double disc mechanical cutter used for high trellis is unsuitable for low trellis system. Development in low trellis has recently been putting pressure on designing a proper cutter. There are two versions of cutters: mechanical cutter and adapted sprinkler for chemical hop pruning. This paper contains construction analysis and agrotechnical requirements for mechanical cutter. Furthermore there is a detailed description of a design for fixed extension arm, mechanical cutter rotor, and telescopic copy wheel used to set up the cut height. The paper also mentions an experimental calculation of FEM analysis of cutting disc and an overall design of mechanical cutter. FEM analysis also contains a graphic interpretation of results which illustrate a deformation caused by critical frequency of cutting disc rotation. The design for mechanical cutter assembly contains also basic visualization of the whole device with distribution of hydraulic hoses to distribute pressure oil. The conclusion deals with a discussion and a suggestion for a consequential research.