The invention relates to a crane extending-retracting method. While a first oil cylinder extends and retracts, extending-out length of a lifting arm is equal to extending-out length L1 of the first oil cylinder; while a second oil cylinder extends and retracts, extending-out length of the lifting arm is equal to three times that of the second oil cylinder; the extending-out length of the integrallifting arm is equal to sum of extending-out length L1 of the first oil cylinder and three times the extending-out length L2 of the second oil cylinder; and extending-out length of the first oil cylinder and/or extending-out length of the second oil cylinder are regulated to be matched with extending-out length of the integral lifting arm according to a preset lifting performance table, so that the lifting arm achieves different lifting abilities. More lifting performance assemblies under the same arm length condition are provided according to the preset lifting performance table, so that an existing lifting performance table is expanded, use convenience of a crane is improved, and lifting performance is improved.

    本发明涉及一种起重机伸缩方法,其第一油缸伸缩时,吊臂的伸出长度等于第一油缸的伸出长度L1;第二油缸伸缩时,吊臂的伸出长度等于第二油缸的伸出长度的三倍;整体吊臂的伸出长度等于第一油缸的伸出的长度L1加上三倍第二油缸伸出的长度L2的和;根据预置的起重性能表,通过调整第一油缸的伸出长度和/或第二油缸的伸出长度以匹配整体吊臂的伸出长度,进而使吊臂达到不同的吊装能力。如此根据预置的起重性能表提供了同一臂长情况下更多的吊装性能组合,从而扩充了现有的起重性能表,提高了起重机使用的便捷性,同时提升吊载性能。


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    Title :

    Crane extending-retracting method


    Additional title:

    起重机伸缩方法


    Contributors:
    DENG LIANXI (author)

    Publication date :

    2020-09-25


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Chinese


    Classification :

    IPC:    B66C Krane , CRANES



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