SHIFTABLE HELICAL PLANETARY GEARING AND TRANSFER GEAR BOX WITH SUCH GEARING FOR AUTOMOBILES Russian patent published in 2010 - IPC F16H3/54 

FIELD: machine building.

SUBSTANCE: invention refers to shiftable helical planetary gearing. The gearing consists of case (1), sun gear (17), carrier (16) with helical satellites (18) and axially travelling crown gear (19) designed to engage either case (1) or carrier (16). First saw-like connecting teeth (50) with first flat side (51) are arranged on ends of crown gear (19). Second saw-like connecting teeth (57) are arranged on case (1) and carrier (16); they have first flat side (67) and connecting teeth (50) entering the first ones so, that at corresponding step of shifting tangential forces actuating crown gear (19) hold down first flat sides (51) of first connecting teeth (50) to first flat sides (67) of second connecting teeth (57) on case (1) and carrier (16). Thus, crown gear 19 is fixed in its corresponding engaged position due to friction closure.

EFFECT: design of compact and simple in fabrication gear.

13 cl, 7 dwg