Crane Hovering Device for No-Load Counterweight Support
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Solution Overview
Problem
Existing cranes with super-lift counterweights face difficulties in slewing and traveling under no load due to the need for complex and heavy hovering devices that interfere with other components and have low assembly efficiency.
Innovation Solution
A crane design with a hovering device connected only to the turntable, not the super-lift jib, which supports the counterweight above the ground, allowing for slewing and traveling under no load while simplifying the structure and improving assembly efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a hovering device is provided to support the super-lift counterweight under no load, then the crane can slew and travel under no load, but the hovering device becomes huge and complicated in structure
Solution Approach 1:
The patent extracts the hovering function from the super-lift jib system by providing a separate, independent hovering device connected only to the turntable. This separation allows the hovering device to be a simple, small structure that only needs to support the counterweight, rather than being integrated into the complex super-lift jib assembly. The hovering device is taken out as an independent component with a dedicated function.
Solution Approach 2:
The patent segments the hovering function from the super-lift jib system into a separate hovering device. By dividing the system into distinct functional modules (hovering device for no-load support, super-lift jib for load-bearing operations), each component can be optimized independently. The hovering device becomes a simple support structure rather than part of a complex integrated system.
2Reliability
If a hovering device connected to both turntable and super-lift jib is used, then the counterweight can be kept off the ground, but the device interferes with the super-lift jib and pushing device
Solution Approach 1:
The patent extracts the hovering function from the super-lift jib system by providing a separate, independent hovering device connected only to the turntable. This separation allows the hovering device to be a simple, small structure that only needs to support the counterweight, rather than being integrated into the complex super-lift jib assembly. The hovering device is taken out as an independent component with a dedicated function.
Solution Approach 2:
The patent segments the hovering function from the super-lift jib system into a separate hovering device. By dividing the system into distinct functional modules (hovering device for no-load support, super-lift jib for load-bearing operations), each component can be optimized independently. The hovering device becomes a simple support structure rather than part of a complex integrated system.
3Adaptability or versatility
If a complex hovering device is provided to support the counterweight, then slewing and traveling under no load is enabled, but assembly difficulty increases and assembly efficiency decreases
Solution Approach 1:
The patent extracts the hovering function from the super-lift jib system by providing a separate, independent hovering device connected only to the turntable. This separation allows the hovering device to be a simple, small structure that only needs to support the counterweight, rather than being integrated into the complex super-lift jib assembly. The hovering device is taken out as an independent component with a dedicated function.
Solution Approach 2:
The patent segments the hovering function from the super-lift jib system into a separate hovering device. By dividing the system into distinct functional modules (hovering device for no-load support, super-lift jib for load-bearing operations), each component can be optimized independently. The hovering device becomes a simple support structure rather than part of a complex integrated system.
Data Source
AI summary
The present application relates to the field of lifting equipment, in particular to a crane and a control method thereof. The crane includes: a body including a chassis and a turntable being rotatably arranged on the chassis; a super-lift device including a super-lift jib, a suspension pulling member and a balancing mechanism, the balancing mechanism including a super-lift counterweight and a pushing device, first ends of the super-lift jib and the pushing device being both connected to the turntable, the suspension pulling member being connected to a second end of the super-lift jib and the super-lift counterweight, a second end of the pushing device being connected to the super-lift counterweight to adjusting a distance between the super-lift counterweight and a slewing center of the turntable; and a hovering device configured to support the super-lift counterweight above a ground when the crane is under no load, a first end of the hovering device being connected to the turntable and a second end of the hovering device being not connected to the super-lift jib. Based on this, the function of slewing and traveling of the crane under no load while carrying the super-lift counterweight is achieved more conveniently.