Fixed wobble -member

The utility model discloses a fixed wobble -member, including rocker, first wobble -member and second wobble -member, the one end of rocker and one side of first wobble -member articulate, and the opposite side of first wobble -member and one side rotatable coupling of second wobble -member, second wobble -member are equipped with the connecting piece, and the connecting piece corresponds for first work position with the pin joint of rocker with first wobble -member, and the pin joint that rocker and first wobble -member were kept away from to the connecting piece is second work position. From this, during first work position, the pin joint of rocker and first wobble -member is located the axis of pivot, and the pivot drives first wobble -member with the rotation of second wobble -member and the rocker is motionless. During second work position, the pin joint of rocker and first wobble -member is not on the axis of pivot, and the pivot can promote the rocker swing when driving first wobble -member and the rot