A balanced vibration generator (1) for resonance-amplified operation of a machine or equipment (20) comprises at least one set of counter-oscillating masses (4, 16, 20) suspended in a spring system (3) in which the resonance springs are helical springs which also support the masses. The generator comprises a built-in, balanced drive system (6, 7, 8). The generator is suspended in securing elements (10, 11) which comprise special, adjustable securing elements (9) which are in engagement with the resonance springs (3) and arranged in such a manner that the resonance springs, when turned around their longitudinal axes (14), can change spring lengths.
A spring coefficient adjustment system for a vibratory drive for use in driving a vibratory delivery apparatus. The drive includes an electromagnet and an associated armature spaced apart by a gap. In the drive, a plate is movable with respect to a frame. One of the electromagnet and the armature is connected to the frame and the respective other is connected to the spring plate. A primary spring is connected between the frame and the spring plate. A plurality of auxiliary elastomer shear springs are selectively engageable between the frame and the plate to change the total spring coefficient between the frame and the plate.
A vibration generator includes a weight member, a shaft rotatable about an axis of rotation extending longitudinally therethrough and having a mounting area on which the weight member is mounted, and a positioning arm disposed in engagement with the weight member on the shaft and rotatable about the axis of rotation relative to both the shaft and the weight member. The mounting area engages the weight member and prevents movement of the weight member relative to the shaft in a circumferential direction about the axis of rotation but permits movement of the weight member relative to the shaft in a radial direction orthogonal to the axis of rotation and coplanar with the circumferential direction. The weight member also defines an elongate positioning slot and the positioning arm includes an axially extending portion disposed through the positioning slot for slidable movement within the positioning slot during rotation of the positioning member relative to the shaft. The axially extending portion in fact defines a cam surface disposed in engagement with the weight member within the positioning slot. Rotation of the positioning arm relative to both the shaft and the weight member moves the weight member relative to the shaft in a radial direction orthogonal to the axis of rotation thereby altering the moment of inertia of the weight member about the axis of rotation and resulting in a different amplitude of vibration during rotation of the weight member.
A conveying apparatus is disclosed and which includes a supporting frame; an article transporting bed which is oriented in spaced relation relative to the supporting frame; a plurality of resilient supports mounted on both the supporting frame and the article transporting bed and which supports the article transporting bed in spaced relation relative to the supporting frame; and a drive assembly borne by the supporting frame and which provides an oscillating force having a plurality of components and which causes the article transporting bed to move reciprocally, and wherein the drive assembly amplifies the components of the oscillating force which are at a given angle relative to the resilient supports.
