Infinitely variable vibration exciter

摘要

A vibration exciter is provided. The vibration exciter includes a shaft and at least two unbalanced weights arranged on the shaft, in which the radial distance of the common center of gravity of the unbalanced weights from the rotational axis of the shaft is adjustable in an infinitely variable way by means of a gear. The vibration exciter comprises a gear which is a spatial coupling gear, e.g. a spatial vibration slider gear. A simple and compact configuration of the vibration exciter is thus proposed, in which the required adjusting forces for changing the imbalance are very low.

主权项

1. A vibration exciter, comprising:
a shaft; at least two unbalanced weights arranged on the shaft, and a gear by which a radial distance of a common center of gravity of the unbalanced weights from a rotational axis (Ax) of the shaft is adjustable in an infinitely variable manner, wherein each of the unbalanced weights is connected with said shaft in a torsion-proof and axially rigid manner, and wherein the unbalanced weights are mounted in a common frame and arranged adjacent to one another via rotational sliding surfaces in such a way that a single adjusting drive is sufficient in order to twist the two unbalanced weights relative to one another, and wherein the gear is a spatial coupling gear which comprises an adjusting slide as a drive link and coupling links, with each coupling link being connected by pivot joint connections with the adjusting slide and one of the unbalanced weights in such a manner that the unbalanced weights can be twisted relative to each other synchronously via the adjusting slide, the synchronous relative twisting movement being a synchronous rotational movement of the unbalanced weights about the rotational axis (Ax) of the shaft, with the unbalanced weights maintaining their axial position and the rotational movement of the unbalanced weights occurring in opposite directions with respect to one another, that is towards each other or away from each other.