FIELD: aviation.
SUBSTANCE: invention relates to aircraft engineering, particularly, to helicopters. Variator for transmission of a light or ultralight helicopter comprises a drive shaft coupled via a coupling with a drive engine, on which there is a driven multi-groove pulley covered with one multi-groove belt with V-shaped protectors or separate V-belts, each of which is placed in a separate groove of the pulley, a driven multi-groove pulley located on the driven shaft, which is subject to connection with the input shaft of the main reduction gear of the blade system. To adjust the tension of the belt or belts, a tension roller is used, which is located on a rotary bracket inside the contour of the multi-groove belt or V-belts. Driven pulley is coupled with driven shaft via overrunning clutch. Drive shaft of belt-type variator is made hollow, inside this hollow shaft there is a separate shaft, which on the side of the drive motor is connected to the output shaft of the drive motor through an externally located plate coupling, and on the other side it is connected to the hollow shaft of the drive pulley through a compensating coupling located inside this shaft or an external plate coupling.
EFFECT: increasing the operational durability of a belt-type variator for transmissions of light or ultralight helicopters.
4 cl, 5 dwg
