An arc-shaped telescopic arm mechanism and a crane with the mechanism

Abstract

The invention discloses an arc-shaped telescopic arm mechanism and a crane provided with the same. The arc-shaped telescopic arm mechanism provided by the invention comprises an arc-shaped first-stage arm and an arc-shaped second-stage arm which are embedded in sequence and can extend and retract relatively; moreover, a telescopic mechanism of the arc-shaped telescopic mechanism consists of a first-stage hydraulic cylinder and a second-stage hydraulic cylinder positioned in the arc-shaped first-stage arm and the arc-shaped second-stage arm, and an arc-shaped skid shoe which is embedded into the arc-shaped second-stage arm; when a first-stage hydraulic cylinder positioned in the arc-shaped first-stage arm extends out, the skid shoe positioned in the arc-shaped second-stage arm is driven to move, the skid shoe drives the second-stage hydraulic cylinder positioned in the arc-shaped second-stage arm to move, the two stages of hydraulic cylinders extend out at the same time, and the telescopic mechanism consisting of the first-stage hydraulic cylinder, the second-stage hydraulic cylinder and the skid shoe drives the arc-shaped second-stage arm to extend out. By adopting the arc-shaped telescopic arm mechanism provided by the invention, on-load extension and retraction of the arc-shaped telescopic arm mechanism can be realized, the operation range of the telescopic arm is expanded, the piling efficiency of a reach stacker is increased, and the workspace of the crane is enlarged effectively.

Description

technical field [0001] The invention belongs to the technical field of engineering machinery, and relates to an arc telescopic arm mechanism and a crane with the mechanism. Background technique [0002] At present, the telescopic arm mechanism of the crane is mainly a linear telescopic arm mechanism (hereinafter referred to as the straight arm telescopic mechanism). Generally speaking, the straight arm telescopic mechanism of the multi-section arm is not allowed to be stretched under load. [0003] On the one hand, for the straight arm telescopic mechanism with a pulley block and a hook at the jib head, it can basically meet the lifting requirements with a certain span, while for the straight arm telescopic mechanism with a spreader directly installed at the end jib end, it can be carried out with a certain span. When there is an obstacle in the hoisting operation of the crane and the heavy object, the hoisting is more difficult. [0004] Such as figure 1 as shown, figure...

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Problems solved by technology

[0007] When the spreader is installed at the end of the boom end, it is impossible or difficult to carry out operations with spans and obstacles, especially for straight arm reach stackers. figure 1 Under the working conditions shown, it is impossible to directly carry out the cross-box hoisting operation, which not only reduces the work efficiency in actual work, but also occupies a large work site and increases the economic cost

[0008] On the other hand, the traditional multi-section arm straight arm telescopic mechanism of the hydraulic cylinder plus rope row type does not allow load telescoping, and the straight arm telescopic mechanism capable of load telescopic (such as the telescopic arm mechanism of the straight arm front crane) cannot directly Used to realize the expansion and contraction of the arc-shaped telescopic arm mechanism

[0009] In addition, for straight-arm reach stackers, it is not easy to meet the lifting requirements for lifting heavy objects below the water level (such as lifting containers on ships below the wharf level). At this time, it is necessary to add other devices or use special spreaders to achieve this kind of lifting. load requirements, and the front hanger with arc-shaped telescopic arm mechanism can easily lift heavy objects below the water level without adding other auxiliary devices.

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