SHOVEL AND METHOD OF CONTROLLING SHOVEL
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United States of America Patent
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Issued Date -
Dec 26, 2013
app pub date -
Mar 29, 2012
filing date -
Mar 30, 2011
priority date (Note) -
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Abstract
A shovel includes a turning electric motor configured to drive a turning body to turn and a turning brake hydraulic motor mechanically connected to the turning body or the turning electric motor. In a state where a turning operation part for turning the turning body is unoperated, the turning body is braked using the turning brake hydraulic motor and the braking operation of a mechanical brake unit for mechanically holding the turning body stationary is released when an operation part for performing an operation other than the turning of the turning body is operated.
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