A crawler track changing device and a crane

Abstract

The invention discloses a crawler track changing device and a crane. The crawler track changing device includes: a vehicle frame; and four connecting beams, the first end of each connecting beam is fixedly connected to the vehicle frame, the second end is located outside the vehicle frame, and the four connecting beams The connecting line of the second end forms a rectangle, wherein a bracket is hinged at the second end of each connecting beam, and each of the brackets is fixedly connected to a crawler, and the crawler can be in the working state and track change Switching between states, the track gauge in the working state is equal to the length of the long side of the rectangle, and the track gauge in the track changing state is equal to the length of the short side of the rectangle. Therefore, the present invention provides a rotary track changing device, the connecting beam of the track changing device is fixed, so that the whole device has higher strength. On the other hand, the crawler track changing device of the present invention can realize a larger track changing ratio.

Description

technical field [0001] The invention relates to the technical field of engineering machinery, in particular to a track changing device and a crane including the device. Background technique [0002] With the development of technology, the requirements for cranes and other equipment are gradually increasing. For example, with the development of wind power construction, the requirements for cranes at wind power construction sites are getting higher and higher. After installing one wind power plant in wind power construction, another wind turbine needs to be installed at another installation point, so mobile cranes are required to meet the requirements. Walking requirements on ordinary roads. The mobile cranes currently used for wind power hoisting adopt the structure of telescopic crawlers (see figure 1 ), said structure comprises crawler belt 1, vehicle frame 2 and slewing support 3 that can expand left and right. When in the working position, the crawler belt 1 protrudes ...

AI Technical Summary

Problems solved by technology

[0003] This kind of structure can basically meet the construction needs of wind turbines below 2 MW, but the mobile cranes used for the construction of wind turbines above 2 MW are affected by the strength of the slewing bearing and structural parts, and it is difficult to meet the walking requirements on ordinary roads (while driving The crawler distance after contraction is too large), the crane needs to be disassembled for transportation when it is transferred, which increases labor intensity and reduces construction efficiency, so it is urgent to design a crane that can realize track change to meet the needs of wind turbines above 2 MW construction needs

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