Swing drive assembly with parking brake

Details Swing drive assembly with parking brake Swing drive assembly with parking brake

B - Operations, Transporting

60

P

212/25

B60P 3/28 (2006.01) B66C 23/86 (2006.01)

Patent

CA 1177788

ABSTRACT OF THE DISCLOSURE A swing drive assembly for a large load handling device including at least one hydraulically driven pinion biased against a segmented ring gear by a hydraulic actuator. A temporary parking brake is provided for each pinion and a hydraulic accumulator maintains pressure in the actuator even when the pumps are shut down. A mechanical swing lock is provided to prevent rotation for longer periods of time and, in the alternative, the drive pinions, if desired, may be permitted to "free wheel" without generating excessive back pressure.

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