CONSTANT-VELOCITY UNIVERSAL JOINT FOR HELICOPTER ROTOR Russian patent published in 2017 - IPC B64C27/37 F16D3/30 

FIELD: aircraft engineering.

SUBSTANCE: invention relates to aircraft engineering, particularly, to designs of propellers hubs on universal link. Constant-velocity universal joint consists of two concentric rings (5A and 5B), wherein first inner ring (5A) has rotary connection with driver (3) two opposite pins (31) connected with transmission shaft (1). Second outer ring (5B) has rotary connection with hub (2) two opposite pins (22). Two concentric rings are also mutually connected by pair of articulated opposite pins (542) at angle of 90° relative to pins (31) connected with transmission shaft, and relative to hub pins (22), which common axis (CA) is stably maintained in plane, called homokinetic, dividing angle between hub (2) axis of rotation and transmission shaft (1) axis of rotation in halves, by means of at least one or two devices (6). At that, bisectors are connected with transmission shaft and with hub.

EFFECT: enabling continuous transmission of rotational movement between transmission shaft (1) and said hub (2), to which blades (7) are attached regardless of hub angle of inclination relative to driving shaft.

10 cl, 12 dwg