Patent ID: 8584833

Claim:
Oscillating conveyor, comprising: a support; a conveying element, arranged to carry objects to be moved and supported by the support to be displaceable between a first extreme position and a second extreme position; and a driving device, arranged on the support to displace the conveying element relatively slowly to the first extreme position and to displace the conveying element relatively quickly to the second extreme position in order thereby to achieve a movement of the objects in a direction which corresponds to a displacement direction of the conveying element from the second extreme position to the first extreme position, the driving device including a crank mechanism, the crank mechanism including a crank, rotatable about an axis of rotation, a crank pin arranged at a distance from the axis of rotation and in parallel therewith, a connecting rod, including a first end connected to the crank pin and turning thereabout and a second end connected to a first pivot pin on a rocker and turning about a pivot axis in parallel with the rotary shaft, said rocker being rotatingly mounted on a pendulum pin in parallel with the axis of rotation and including said first pivot pin on a first rocker arm and a second pivot pin pivotally connected to the conveying element to cause the desired displacement thereof, wherein the crank pin, the first pivot pin and the pendulum pin jointly define a triangle, in which, when the crank rotates, a length of a side between the crank pin and the pendulum pin varies, causing an variation of the triangle angles, wherein the pendulum pin is mounted in such a way in relation to the axis of rotation that, when the crank rotates, the angle at a corner of the pendulum pin varies within an angular range being either obtuse or acute, resulting in the desired displacement of the conveying element at different speeds, and wherein the position of the pendulum pin in relation to the rotational axis is adjustable, thus enabling a variation of the displacement speed of the conveying element.