Lopper for trimming trees driven by linear electric motor
2020
Antonov, S., Stavropol State Agrarian Univ. (Russian Federation) | Nikitenko, G., Stavropol State Agrarian Univ. (Russian Federation)
The main goal of the intensive development of gardening is to provide the population with high-quality fruit and vegetable products. The level of mechanization of gardening reaches 60 %. This is usually agrotechnical measures for plowing, fertilizing, spraying and contour trimming. A very important factor affecting the yield and quality of fruit products is the detailed pruning of branches. The choice of design parameters for garden care devices depends on the physicomechanical properties and dimensional parameters of the branches. Analysing existing studies on the dimensional characteristics of the cut branches, we can conclude: from 60 to 80 % of the cut branches have a diameter of up to 15 mm; from 20 to 40 % of cut branches have a diameter of more than 15 mm. Secateurs are used for pruning branches with a diameter of up to 15 mm. To trim branches with a diameter of 15 m and above, it is necessary to use more powerful devices – delimbers. Currently, there are many mechanized devices for pruning trees (HISEED, GREENWORKS, SWANSOFT, etc.). They allow trimming branches with a diameter of up to 50 mm. The main disadvantage of these devices is the use of a DC motor to drive the blades. This leads to increased energy consumption, as well as to the use of rechargeable batteries with large mass and overall dimensions. Using a linear electric motor improves the energy efficiency of the delimbers. This is due to the simplification of the kinematic scheme of the device, as well as through the use of kinetic energy of the armature and the movable blade.
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