Wacker-werke Gmbh & Co Kg

Wacker Corporation

Manfred Polacek

Vibrator with incorporated electric motor

Safety device for a drive unit of a vibration roller

A vibratory roller is disclosed having a frame comprised of pivotally interconnected front and rear subframes. A motor is mounted on the frame and a steering mechanism is provided to articulate the subframe relative to each other. A roller drum carrier is mounted by a longitudinal centerline suspension system to support each of the subframes. Ground engaging roller drums are rotatably mounted on the roller drum carrier for rotation about an axle axis. An exciter mechanism for generating a vibratory compacting force is mounted in the roller drum carrier below the axis. Hydraulic drive units for rotating the roller drums are mounted in the roller drive carrier above the axis.

Vibratory roller

The vibrating roll apparatus has a hydrostatic roll body drive drive. An internal-combustion engine drives a pump unit which includes an inclined disk pump of variable displacement and a filling pump. At least one hydraulic drive motor which is fed a pressurized medium by the inclined disk pump powers the hydrostatic roll body drive. An eccentric body in the roll body of the vibrating roll is driven by a mechanical power transmission device with a built-in clutch also powered by the internal-combustion engine. According to the invention the clutch is flanged to the pump unit and provided with a hydrostatically-operated clutch mechanism, which is connectable with the pressurized side of the filling pump by a clutch valve for engagement of the clutch. In this way a space-saving compact form for the drive for the eccentric body including means for its control with optimum conditions for clutch operation is attained.

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Munich, Germany

Manfred Polacek