IMPACT DRILL-SCREWDRIVER Russian patent published in 2016 - IPC B25D11/10 B25D16/00 B25B23/14 B25B21/02 B23B45/16 

FIELD: tools.

SUBSTANCE: invention relates to impact drill-screwdriver. Impact drill-screwdriver comprises spindle, planetary gear down speed mechanism coupling mechanism, cam mechanism configured to selectively apply axial vibrational motion to spindle, and vibration mechanism. Coupling mechanism comprises gear wheel of internal engagement of the last stage, made with possibility of rotation on last stage of planetary gear down speed mechanism, fixed elements to engage with end surface of internal engagement gear wheel, and cylindrical helical spring. Vibration mechanism comprises switching element to turn in first and second angular positions, connector coupled with switching element, and actuator connected with connecting element and made with possibility of rotation of switching element in one of first and second angular positions. Helical coil spring is located between the switching element and actuating element. Connecting element is arranged to pass through gap between transfer appliances coupled elements and bypass around the back end of cylindrical coil spring.

EFFECT: as result of reduced dimensions of impact drill-screwdriver in its axial direction.

13 cl, 15 dwg