SCREW-TYPE GEAR AND METHOD OF ITS MANUFACTURING Russian patent published in 2010 - IPC F16H25/22 

FIELD: machine building.

SUBSTANCE: invention relates to machine building field, particularly to screw gears with rolling element. Screw-type gear consists of screw and screw nut, on which there are implemented helical race grooves, and rolling elements with ability of movement by mentioned race grooves. Either screw, or screw nut is implemented of two co-axial parts with butt curved surfaces, herewith on each butt curved surface it is implemented part of race groove. Co-axial parts are installed by butt curved surfaces in the opposite direction to each other with a gap and with ability if enveloping of rolling elements by both parts of race groove. Sorting of gap in gear is implemented by means of pressure in axial direction of one co-axial part to other co-axial part. Additionally co-axial parts with butt curved surfaces are outfitted by common guideline, located parallel to pivot pin of gear.

EFFECT: reduction of mass and overall dimensions of gear, and also reliability growth of its operation and resource.

7 cl, 3 dwg