Marine knuckle crane

Abstract

The invention discloses a marine knuckle crane which comprises a base, a tower body, a main lazy arm, an auxiliary lazy arm, a lifting winch, a first oil cylinder and a second oil cylinder. The base is fixed to the side of a ship, the tower body is fixed to the base, and a cab is arranged at the front end of the tower body. The main lazy arm is hinged to the upper end of the tower body. The two ends of the first oil cylinder are hinged to the tower body and the bottom face of the main lazy arm correspondingly. The main lazy arm is controlled by the first oil cylinder to be folded. The auxiliary lazy arm is of a bent structure, and one end of the auxiliary lazy arm is hinged to the front end of the main lazy arm. The two ends of the second oil cylinder are hinged to the bottom face of the main lazy arm and the bent point of the auxiliary lazy arm. The auxiliary lazy arm is controlled to be supported or retract. The lifting winch is mounted on the upper end face of the main lazy arm, andsteel wire rope guide is carried out through a guide wheel mounted on the main lazy arm and the auxiliary lazy arm.

Description

technical field [0001] The invention relates to a crane, in particular to a marine folding arm crane. Background technique [0002] A marine crane is a machine used for lifting, loading and unloading cargo on sea transport ships. Generally, a crane is installed on a large cargo ship, which includes a base welded on the base of the ship's deck and a column fixed on the base. A telescopic boom controlled by an oil cylinder is hinged at the top of the telescopic boom, and a hoisting winch is installed at the lower end of the telescopic boom. For a crane with this mechanical structure, since the base and the column are fixedly connected and the pump station is installed on the deck, and the boom cannot be retracted, So the telescopic boom can only be the one-way operation of stretching out and retracting forward, which is not only inconvenient to use and affects work efficiency, but also takes up a lot of space and has a large windward area, which affects the speed of the hull. ...

AI Technical Summary

Problems solved by technology

[0002] A marine crane is a machine used for lifting, loading and unloading cargo on sea transport ships. Generally, a crane is installed on a large cargo ship, which includes a base welded on the base of the ship's deck and a column fixed on the base. A telescopic boom controlled by an oil cylinder is hinged at the top of the telescopic boom, and a hoisting winch is installed at the lower end of the telescopic boom. For a crane with this mechanical structure, since the base and the column are fixedly connected and the pump station is installed on the deck, and the boom cannot be retracted, Therefore, the telescopic boom can only be a one-way operation of extending forward and retracting, which is not only inconvenient to use and affects work efficiency, but also takes up a lot of space and has a large windward area, which affects the speed of the hull.

[0003] Although the crane of this structure has no practical effect on large ships, on some small ships, due to the small load capacity of the ship itself, this kind of non-foldable crane not only increases its occupation area, but also has a large windward surface of the boom that extends horizontally. , not only affects the speed, but also causes the hull to tilt

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