Self-mounting-dismounting type auxiliary arm mounting mechanism of automobile crane

Abstract

The invention discloses a self-mounting-dismounting type auxiliary arm mounting mechanism of an automobile crane. The self-mounting-dismounting type auxiliary arm mounting mechanism comprises a rotarytable, a main boom, an amplitude-variable oil cylinder and an auxiliary arm hinged to the main boom. A front support and a rear support are fixedly arranged on the side, adjacent to the auxiliary arm, of the main boom, and a front roller set and a rear roller set corresponding to the front roller set are arranged on the auxiliary arm. A fixed pulley is fixedly arranged on the rotary table, a pulley frame is fixedly arranged on one side of the main boom, one or more movable pulleys are arranged on the pulley frame, the movable pulley adjacent to the auxiliary arm is higher than the auxiliary arm, one end of a lifting rope is fixedly connected to the main boom, the lifting rope is wound around the fixed pulley and all the movable pulleys, and the other end of the lifting rope is connected with the auxiliary arm. The self-mounting-dismounting type auxiliary arm mounting mechanism has the beneficial effects of being simple in device, low in cost, high in automation degree and high in mounting efficiency, is not limited by field space and is convenient to implement.

Description

technical field [0001] The invention relates to a mounting mechanism for a secondary arm, in particular to a self-loading and dismounting mounting mechanism for a secondary arm of a truck crane. Background technique [0002] At present, medium and small tonnage truck cranes are equipped with jibs during driving and use. After the jib hoisting operation is completed at the workplace, the jib needs to be placed on the side of the main boom and carried on the belt. When the elevation angle of the main boom is -2°, during the installation process, the jib is rotated and installed through the pin shaft hinged with the main jib. When the jib enters the front bracket on the main jib, due to the The gap between the self-weight and the connection between the jib and the pin hole of the main boom causes the height difference between the jib and the rear bracket to be 100-200, which prevents the rear roller group on the jib from entering the rear bracket, and the weight of the jib is a...

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Problems solved by technology

[0002] At present, medium and small tonnage truck cranes are equipped with jibs during driving and use. After the jib hoisting operation is completed at the workplace, the jib needs to be placed on the side of the main boom and carried on the belt. When the elevation angle of the main boom is -2°, during the installation process, the jib is rotated and installed through the pin shaft hinged with the main jib. When the jib enters the front bracket on the main jib, due to the The gap between the self-weight and the connection between the jib and the pin hole of the main boom causes the height difference between the jib and the rear bracket to be 100-200, which prevents the rear roller group on the jib from entering the rear bracket, and the weight of the jib is about 400-200 900Kg, it is impossible to lift and install the jib by manpower. Only other auxiliary lifting equipment can be used to complete the installation of the jib. Now most of the cases are realized by forklift or another crane. High cost, low efficiency, and often limited by site space, it is difficult to implement and difficult to install

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