MOBILE REAR COUNTERWEIGHT DEVICE FOR CRAWLER CRANE
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United States of America Patent
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Issued Date -
Nov 7, 2013
app pub date -
Jun 27, 2011
filing date -
Jan 19, 2011
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A mobile rear counterweight device for crawler crane is provided wherein comprising: a slide rail, mounted at the rear of the crawler crane, and one end of the slide rail is connected with the rear of the main platform while the other end of the slide rail is connected with a mast by a pull rod; and, a hoist driving mechanism and a trolley driven by the mechanism, one end of the said mechanism is connected with the end of the slide rail which is near the rear of the main platform, the other end of the mechanism is connected with the trolley, the said trolley bearing counterweight block is mounted on the slide rail. The crane is accessible to the utmost extent to attain the max lifting load and stability by using counterweight blocks, and the barycenter of the crane closes to the center of rotation, and the trolley is driven by a hydro cylinder and a connecting rod mechanism, while the trolley is carrying the counterweight is blocks and going faraway from or near to the barycenter of the crane along the slide rail at the rear of the crane, so that enhances lifting capability of the crane and keeps stability of the crane. The mobile rear counterweight device is easy to assemble, disassemble and transport.
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