DEVICE FOR DISCRETE PHASE SHIFTING

摘要

Devices for phase shifting between a drive wheel and an output shaft are known, wherein a torque to be introduced into the system is exerted on the output shaft for adjustment. Therefore the invention relates to a device having a drive wheel (2), a coupling mechanism (10), an output shaft (4) which is driven via the coupling mechanism (10), and an actuator (58), wherein, upon actuation of the actuator, the angle of rotation of the drive wheel with respect to the output shaft can be moved via the coupling mechanism. A four-bar linkage (10) having two axles (8, 24) which are immovable relative to the drive wheel (2) and two axles (14, 18) which are movable relative to the drive wheel (2) serves as a coupling mechanism. The four-bar linkage (10) has a cam (12), the axis of rotation of which is a first one of the immovable axles (8) and the cam output axis (14) is a first one of the movable axles. A roller (20) or a gear wheel is disposed on a second one of the movable axles (18), which revolves selectively in one of at least two contours (46, 50, 54), which are movable relative to the roller (20) or the gear wheel, the roller (20) or the gear wheel being loaded by means (36; 32) for pressing against the contour (46, 50, 54). In such an embodiment the energy requirement is substantially reduced.