Climbing Crane Gripper Locking for Anti-Fall Stability
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Solution Overview
Problem
Existing tower cranes occupy significant ground space, require multiple units for operation, obstruct traffic, are complex and heavy, and lack safety features such as anti-fall mechanisms and rotation limiting parts, making them unsuitable for high hoisting tasks and inclined structures.
Innovation Solution
An automatic climbing crane with grippers equipped with bolts for secure locking, gripper driving mechanisms for angle control, rotation limiting parts, and hydraulic systems for stable climbing, along with safety switches and supporting seats for enhanced stability and safety.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If tower cranes are used for hoisting, then hoisting capability is achieved, but ground space occupation increases and traffic obstruction occurs
Solution Approach 1:
The climbing crane is divided into multiple sections that can climb incrementally along the column body, allowing the crane to move vertically without occupying ground space. The segmented structure enables the crane to ascend step-by-step, maintaining hoisting capability while eliminating the need for large ground footprints associated with traditional tower cranes.
Solution Approach 2:
The climbing crane employs a dynamic climbing mechanism with movable holding mechanisms that can attach and detach from the column body at different positions. This dynamic system allows the crane to progress vertically along the column while maintaining stability, resolving the contradiction between achieving height and occupying ground space.
2Power
If tower cranes are arranged on the ground, then hoisting operation is possible, but multiple cranes are required which increases complexity
Solution Approach 1:
The climbing crane integrates multiple functions into a single device: it can hoist loads, climb vertically along the column body, and position itself at different heights. This multi-functional design eliminates the need for multiple separate cranes, reducing system complexity while maintaining full hoisting operation capability throughout the construction process.
3Device complexity
If holding mechanism only controls tightness of holding hoop, then simple structure is maintained, but opening and closing angle control is lost and crossbeams cannot be avoided
Solution Approach 1:
The holding mechanism incorporates a movable gripping component that can dynamically adjust its opening and closing angle along the arc trajectory. This dynamic adjustment capability allows the gripper to navigate around crossbeams and other obstructions on the column body while maintaining secure attachment, enhancing climbing smoothness without significantly increasing structural complexity.
4Device complexity
If anti-fall mechanism is not provided, then structure is simpler, but safety is greatly reduced
Solution Approach 1:
The climbing crane is equipped with an anti-fall mechanism that acts as a safety cushion before actual failure can occur. This mechanism includes backup holding components and limit switches that engage automatically if the primary holding mechanism fails, preventing falls and ensuring operator safety. The anti-fall system adds minimal structural complexity while dramatically improving reliability.
5Device complexity
If rotation limiting part is not arranged, then structure is simpler, but slippage and rotation between gripper and supporting body occur
Solution Approach 1:
A rotation limiting part is introduced as an intermediary element between the gripper and the column body. This component prevents unwanted rotation and slippage by providing a mechanical constraint that maintains proper alignment during climbing operations. The rotation limiter adds minimal structural complexity while significantly improving holding stability and preventing operational failures.
6Device complexity
If gripper release and holding states are not linked, then control is simpler, but safety hazards such as simultaneous release occur
Solution Approach 1:
The control system incorporates feedback mechanisms including limit switches and interlocks that monitor the state of each holding mechanism and prevent simultaneous release. When one gripper is in the release state, the system automatically ensures another gripper remains in the holding state through electrical interlocks. This feedback-based control adds minimal complexity while dramatically improving holding reliability and preventing safety hazards.
Data Source
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AI summary
An automatic climbing crane comprises a body and a crane platform arranged on the upper part of the body. The body is provided with a plurality of spaced holding mechanisms and a climbing driving mechanism for controlling the body to climb up and down along a supporting body; each holding mechanism comprises a gripper and a gripper driving mechanism for controlling the opening and closing of the gripper; and an opening and closing end of the gripper is provided with a bolt for the gripper to lock the supporting body. On the one hand, the present invention can prevent the automatic climbing crane from falling and greatly improve the safety; and on the other hand, the present invention can enable the holding mechanisms to obtain stable support during operation, and improve the safety and the stability of the automatic climbing crane.