DEVICE FOR TRANSMITTING A ROTARY MOVEMENT FROM A DRIVING SHAFT TO A DRIVEN SHAFT TO IMPART TO THE LATTER AN ANGULAR VELOCITY WHICH VARIES RELATIVE TO THAT OF THE DRIVING SHAFT

摘要

The invention relates to a device for transmitting a rotational movement from a driving shaft (34) to a driven shaft (60), where the driven shaft, in accordance with a predetermined sequence, is imparted an angular velocity during its rotation which varies relative to the driving shaft. The driving shaft (34) has a drive wheel (36) with a plurality of curve grooves (42, 44, 46, 48) which have predetermined curve shapes with a slope which varies depending on the predetermined variation of the angular velocity of the driven shaft (60). The driven shaft (60) overlaps partially the driving wheel (36) and has a plurality of driver curve rollers (72) distributed circumferentially and which are disposed to be sequentially inserted into a respective curve groove in the driving wheel in order to be driven thereby during a portion of the rotation of the drive wheel until the subsequent curve roller (72) in the rotational direction is brought into rolling contact in a subsequent curve groove.