The invention discloses a method for obtaining the tower crane cargo boom prestress. A cargo boom is made to obtain prestress by changing the length of an arm frame pull rod connected between the cargo boom and a supporting arm on the premise that the position of a hinge point of the arm frame pull rod and the cargo boom is not changed in a tower crane of a super statically determinate structure, that is, under the condition that the whole machine structure of the tower crane is not changed, the cargo boom structure can obtain certain prestress in advance just by changing the length of the arm frame pull rod, accordingly the stress feature of the cargo boom is improved, and the bearing capacity of the cargo boom is improved.
Method and device for obtaining tower crane cargo boom prestress
2015-07-01
Patent
Electronic Resource
English
Cargo boom connecting device of small tower crane machinery
European Patent Office | 2020
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