Patent ID: 6330848
Filing Date: 2001-12-18
Classification: B23D,Y10T

Abstract:
A circular saw cutting machine for transmitting the rotation of an electric motor to a main shaft and for cutting a work material by using a circular saw attached to one end of the main shaft, characterized in thata confining engagement gear string is constituted by arranging three or more odd-numbered intermediate gears forming a loop with a main shaft gear fixed to said main shaft, engaged with one another and simultaneously rotated, the rotation of the electric motor is transmitted to one of the intermediate gears, at least one of the intermediate gears is movable and a load is applied to at least one of the movable intermediate gears, thereby eliminating a backlash of the confining engagement gear string; andif an outside diameter of said circular saw is D (mm), the number of revolution is N (rpm) and a cutting force per tooth as a component of force in tangential direction is F (kgf), a sum J of moments of inertia (kgf.multidot.m.multidot.sec.sup.2) of main shaft conversion of respective shafts including the main shaft, the respective shafts cooperated with one another in a state in which a backlash is eliminated from said main shaft, is set at J.gtoreq.F.times.(D/2)/[1000.times.250.times.(N/60).sup.2 ].