STEPLESS LUFFING MECHANISM FOR SUPER-LIFTING COUNTERWEIGHT OF CRAWLER CRANE AND OPERATING METHOD THEREOF
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United States of America Patent
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Issued Date -
Jan 24, 2013
app pub date -
Jun 12, 2010
filing date -
Jan 26, 2010
priority date (Note) -
Abandoned
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Abstract
A stepless luffing mechanism for the super-lifting counterweight of a crawler crane, and an operating method thereof. The luffing mechanism includes a main luffing mast, a lifting oil cylinder, a luffing structure and a pulling board for the counterweight, and a super-lifting mast. The cylinder's lower end is connected with the counterweight, and its upper end is connected with a lower end of a front part of the luffing structure. The upper end of the luffing structure's front part is connected with the pulling board's lower end. A lifting rope connects the pulling board's upper end with the super-lifting mast's upper end. The super-lifting mast's lower end is connected with a platform's back end. An angle measuring sensor for the main luffing mast is provided on the super-lifting mast. A lower end of a back part of the luffing structure is connected with a pin shaft of the platform.
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