Electric hacksaw based on a linear electric motor for use in garden

The level of electrification and mechanization of processes in horticulture for various fruit crops ranges from 10 to 60%. An increase in production efficiency is closely related to an increase in the automation of technological processes up to 90%. Detailed pruning of branches takes up to 30% of all agrotechnical measures for the care of the garden. The system of detailed tree pruning machines includes pruners, choppers and hacksaws. According to the principle of operation, hacksaws are manual, pneumatic, hydraulic and electric. The main disadvantages are low productivity, high vibration, noise and weight and dimensions. Electric hacksaws are most effective. The aim of the presented research is to develop an electrified hacksaw based on a linear electric motor. The authors proposed a hacksaw design, using a linear electric motor as a drive for the hacksaw blade. The principle of operation of the hacksaw is based on the reciprocating movement of the armature of a linear electric motor. This is done through the use of two magnetizing coils and a special armature design. The presence of non-magnetic and magnetic inserts allows you to obtain magnetic fluxes, which lead to the appearance of an armature pulling force. The use of the proposed design of the hacksaw will increase the efficiency, reduce vibration, noise and weight and dimensions. Modeling a linear electric motor in the ELCUT software package made it possible to confirm the principle of operation of the magnetic system. In the places where the non-magnetic insert is located, the magnetic flux is separated, which contributes to the appearance of the traction force acting on the armature. The greatest value of the traction force of the first magnetizing coil (43,6 N), with a non-magnetic insert width of 10 mm and a pole bevel angle of 60°. For the second magnetizing coil, the pulling force is the same as for the first magnetizing coil.