Hacksaw for pruning trees in gardens based on a linear electric motor

An important socio-economic task of the country is to provide the population with food. The normative consumption of fruits and berries per person per year should be 90 kg. The rapid development of domestic horticulture is not possible without the development of a set of machines for caring for the garden. The most pressing problem in industrial gardening is tree care. Pruning branches of various diameters is the most expensive item in garden maintenance. Detailed pruning of trees is needed to increase yields and normal tree development. For pruning branches up to 30 mm, pruners and loppers are used. Together with pruners and loppers, hacksaws are used to trim branches with a diameter of more than 30 mm. They are: manual, hydraulic, pneumatic and electric. Hand saws are characterized by low productivity. Hydraulic and pneumatic ones have high mass, high vibration and noise level, low operational reliability, as well as dependence on the energy source. For electric hacksaws, which are used to drive the saw in motion, the DC machine is also characterized by low energy efficiency, high vibration and large mass and dimensional indicators. The proposed electrified hacksaw is based on the use of a linear electric motor to drive the saw. This will simplify the kinematic scheme of power transmission, and thereby increase the energy efficiency of the device. The use of a linear electric motor increases the operational reliability of the tool. The reciprocating motion of the armature of the linear electric motor is provided by the presence of two magnetizing coils. The combination of magnetic and non-magnetic inserts allows the redistribution of magnetic fluxes, at which the traction force of the armature of a linear electric motor appears. A saw is attached to the engine anchor, which carries out the process of sawing wood. Modeling of the magnetic system of a linear electric motor was performed using the ElCut program.