Hacksaw machine i.e. jigsaw, has mass balancing arrangements that rotate together in opposite directions during operation such that individual balance points of arrangements add to balance point formed by mass balancing device

摘要

The machine has a sawing unit (6) to implement a stroke movement, and a drive device (2) to drive the sawing unit. A mass balancing device balances an inertia force that occurs during the stroke movement. The mass balancing device forms a balance point implementing a balancing movement opposite to the stroke movement. The mass balancing device has mass balancing arrangements (16, 17) that rotate together in opposite directions during operation in such a manner that individual balance points of the arrangements add to the balance point formed by the mass balancing device.