SYNCHRONOUS BELT SPROCKET Russian patent published in 2012 - IPC F16H7/02 

FIELD: machine building.

SUBSTANCE: sprocket comprises at least one groove for engagement with a toothed belt. The specified groove has a side surface with a radius (R1) of the groove bottom making approximately from 105% to approximately 125% of the belt tooth leg radius. When the toothed belt is made in the form of a rack, the specified radius of the groove bottom is connected with an arched coupled side section (200) of the groove by a linear side section (202), and the specified linear side section is arranged at the angle (Φ), making approximately from 18° to approximately 24° relative to a centre line (CL) of the groove, and comprises length making at least approximately 20% of the sprocket groove depth (h).

EFFECT: invention makes it possible to avoid concentration of cutting efforts on a tooth leg, which increases time of belt operation.

3 cl, 12 dwg