Crane Hose Routing Inside Arm Structure
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Solution Overview
Problem
Existing crane hose guides are prone to damage during operation due to the risk of hose line entanglement and stress, particularly at the transition from the crane column to the first crane arm.
Innovation Solution
A crane design where the hose line runs from a connection point on the crane column to a second connection point near the first joint of the crane arm, with superfluous sections being housed inside the arm, ensuring a compact and taut guidance that reduces stress on the hose line.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the hose line is guided externally from the crane column to the first crane arm, then the hose routing is simple to implement, but the hose line is exposed to damage risk during operation
Solution Approach 1:
The hose line is routed through the interior of the first crane arm, nesting the flexible hose within the rigid structural envelope of the arm. This protects the hose from external damage while maintaining connection between the crane column and arm, resolving the contradiction between simple routing and damage protection.
Solution Approach 2:
The hose line itself acts as a flexible conduit that can accommodate the pivoting movements of the crane arm while maintaining a taut configuration. The flexibility of the hose allows it to bend and flex with arm movement without breaking, while its tensile strength prevents excessive sagging or damage.
2Reliability
If the hose line is guided in a taut configuration to reduce damage risk, then the hose durability is improved, but the hose routing becomes more complex
Solution Approach 1:
The hose routing is merged with the structural path of the first crane arm, using the arm's interior space as the hose conduit. This combines the structural support function with the hose protection function, achieving a taut hose configuration without adding separate complex routing structures.
Solution Approach 2:
The hose is routed through the third dimension (interior volume) of the first crane arm rather than along its external surface. This dimensional transition allows the hose to maintain a protected, taut configuration while accommodating arm pivoting movements without external interference.
3Adaptability or versatility
If the hose line accommodates arm pivoting movements, then the operational flexibility is maintained, but the hose is more prone to stress and damage
Solution Approach 1:
The hose routing is designed to be dynamic, allowing the hose to flex and change configuration as the crane arm pivots. The hose maintains tension throughout the range of motion, adapting to changing geometric relationships between connection points while preventing excessive stress through controlled flexibility.
Data Source
Figure 1
Figure 2a
Figure 2b
AI summary
Crane (1) with a crane column (3) rotatably arranged about a vertical axis on a base frame (2) and a first crane arm (4) pivotably mounted on the crane column (3) via a first joint (8), wherein at least one hose line (12) leads from a first connection point (13) on the crane column (3) or the base frame (2) to a second connection point (14) in or on the first crane arm (4), wherein a pivoting movement of the crane arm (4) relative to the crane column (3) causes an increase or decrease in the distance between the first and the second connection point (13, 14), wherein the excess sections of the at least one hose line (12) that become available when the distance between the first and the second connection point (13, 14) is reduced are arranged inside the first crane arm (4).