Saw for construction cutting work

摘要

A saw (1) being portable and/or wheeled, such as a wall saw, floor saw or masonry saw, comprising a rotatable circular saw blade (3), a drive motor (5) with an motor output shaft (9) for rotating the saw blade (3), and a transmission (20) for interconnecting the motor output shaft (9) to the rotatable saw blade (3) in order to change an unsuitable high speed and low torque combination of the motor output shaft (9) into a more useable lower speed and higher torque combination at the rotatable tool (3), wherein the transmission (20) comprises two adjustable friction saw protective clutches in parallel, which can be set at a desired predetermined value, so as to limit the maximum size of the forces that the teeth and gears of the transmission (20) are exposed to. No over dimensioning is necessary, and the transmission (20) will make out fine in rough environments. The transmission may be of single-speed or two-speed type.

主权项

1. A saw comprising a rotatable circular saw blade, a drive motor with an motor output shaft for rotating the saw blade, and a transmission for interconnecting the motor output shaft to the rotatable saw blade in order to change an unsuitable high speed and low torque combination of the motor output shaft to a more useful lower speed with higher torque at the rotatable tool, the transmission including a first gear mounted on the motor output shaft, two first gear assemblies arranged to be driven in parallel by the first gear, a second gear arranged to be driven by the two first gear assemblies in parallel, the second gear having a gear output shaft, on which the saw blade is intended to be mounted, each one of the first gear assemblies including one adjustable friction saw protection clutch.