Telescopic Crane Arm Hose Connection Access
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Solution Overview
Problem
The frequent wear and tear of hose lines inside telescopic arms on cranes necessitates frequent replacement, which is complex and time-consuming due to the telescoping mechanism.
Innovation Solution
A removable U-shaped cover is placed over the connections at the end of the articulated arm, allowing easier access and inspection of hose line connections, with the connections arranged on a fixed mounting block for improved accessibility and compactness, and a chain system connected to a chain tensioner on the mounting block for enhanced movement and tension management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If the telescopic arm structure is used with hose lines running inside the telescoping sections, then the crane can achieve extended reach and lifting capability, but the hose lines are subject to frequent wear and tear requiring complex replacement procedures
Solution Approach 1:
The telescopic arm is divided into separate sections (inner telescopic section and outer stationary section) with distinct connection areas. The hose lines are routed through separate conduits in each section, allowing individual sections to be accessed and maintained independently without requiring complete disassembly of the telescopic mechanism.
Solution Approach 2:
A conduit system acts as an intermediary structure that guides and protects the hose lines through the telescopic sections. This intermediary pathway allows hose lines to be accessed, inspected, and replaced without directly manipulating the telescopic arm mechanism itself, simplifying maintenance procedures.
2Adaptability or versatility
If the hose line connections are distributed over the articulated arm, then the telescopic mechanism has more flexibility, but the connections become difficult to access for inspection and maintenance
Solution Approach 1:
The hose line connections are extracted from the distributed positions along the articulated arm and concentrated into a specific accessible area. This extracted connection zone is positioned where maintenance personnel can easily access all connections without requiring disassembly of mechanical components, while the telescopic mechanism retains its full range of motion.
Solution Approach 2:
The connection area is positioned in a spatial location that is accessible from the exterior of the telescopic arm structure. By arranging connections in a dimension that is externally accessible rather than embedded within the telescoping sections, maintenance personnel can inspect and service hose lines without interfering with the mechanical telescoping operation.
3Volume of moving object
If a compact design is used with connections arranged on a mounting block, then the structure becomes more space-efficient, but the connections may become harder to access
Solution Approach 1:
The mounting block design concentrates all hose line connections in a localized compact area, but this specific location is strategically positioned to be externally accessible. The local quality of the connection area is optimized for both compactness and accessibility by placing it at the end of the articulated arm where space is constrained but external access is available.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This design simplifies the replacement and maintenance of hose lines by providing better access and ensuring proper connection tightness, while the chain system ensures efficient relative movement and tension, reducing wear and tear-related issues.
Implementation Method 1
By introducing hydraulic fluid into the cylinder, the piston is pushed back and the partial arm on the crane side moves out of the knuckle boom
Implementation Method 2
the chain is guided around twice the distance of the movement of the partial arm on the crane side around the chain roller, so that the crane arm at the end moves twice the distance of the shifts the crane arm on the crane side
Data Source
Figure 1
Figure 2a
Figure 2b
AI summary
The arm has crane extendable two-piece telescope arm with a crane-lateral exterior partial arm (3) and an end sided internal partial arm (4). The crane arm has piping, which leads to connections within the end area of the buckling arm. The connections are covered partly by a cover (21) detachably arranged at the end area of the buckling arm (1). The distance of the connections of the hose lines (5) is accessible. An independent claim is also included for a telescope arm with the cover with a u-shaped cross section.