DEVICE FOR TRIMMING END WINDINGS OF ELECTRICAL MACHINES Russian patent published in 1999 - IPC

FIELD: electromechanical and electrical engineering; repairs of electrical machine windings. SUBSTANCE: device has spindle carrying mandrel on one end and feed-control cam, on other end. Spindle has concentric bore that mounts shaft for rotation. Fixed gear is installed in mandrel on one end of shaft and flywheel with recesses and handle, on its other end. Mandrel also houses nut whose butt end is made as bevel gear wheel which is in mesh with fixed gear. Screw is joined with cutting tool (knife). Device also has lock mounted in fixed casing; lock has pushrod held tight against cam by means of spring and is provided with pin fixed therein for engaging flywheel recesses. Knife starts trimming stator winding as soon as spindle drive is switched on. In the process, when flywheel is locked in position by means of pin, gear wheel runs over fixed gear and turns about its axis, nut pulls out screw with knife. This operation feeds knife for cutting in. When flywheel is unlocked, knife is not fed and shaft turns together with spindle. EFFECT: simplified design and improved service life of tool. 3 cl, 3 dwg