RACK TOOTHING FOR LINEAR DRIVE (VERSIONS) Russian patent published in 2009 - IPC F16H19/04 

FIELD: mechanical engineering.

SUBSTANCE: invention relates to tooth rack gear, transforming rotary motion into forward motion and on the contrary. It can be used instead of usual involute gear of rack-and-gear mechanisms in linear drives of stands, in devices of auto steering control, and also in load-lifting technology (rack-and-gear jack and suchlike). Rack toothing for linear drive contains wheel (1) and rack (2). Wheel is implemented with one tooth with profile in transverse section of wheel in the form of circumference (3), off-centre displaced from pivot pin of wheel (1). Skew tooth is formed by successive and continuous turn of transverse sections around wheel's axis with formation of helical surface. Rack (2) allows helical teeth (4) of cycloidal profile, conjugated to helical surface of wheel (1). In the second option wheel (1) allows also one tooth and composed from certain crowns, each of which allows profile in the form of off-centre shifted circumference. Teeth of rack (2) are composed also from several cycloidal crowns. Adjacent wheel crowns and racks are phase shifted relative to each other for pitch of corresponding crown, divided for number of crowns.

EFFECT: invention provides creation of small-capacity rack toothing and increasing of its load-carrying capacity.

4 cl, 6 dwg