Telescopic Boom Roller Assembly Load Distribution
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Solution Overview
Problem
Telescopic boom devices experience frequent equipment failures and operational delays due to compressive forces on rollers during the extension and retraction of the inner boom, which leads to pressure on the roller wheels.
Innovation Solution
A roller assembly is introduced that includes a housing, forward and rear stabilizers, and a roller bar, which couples to the outer boom to reduce pressure on the roller wheels by engaging guide rails on both the inner and outer booms, thereby distributing the load effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If roller wheels are used to guide the inner boom during telescopic movement, then the boom can extend and retract smoothly, but the roller wheels are subjected to high compressive forces that cause frequent failures
Solution Approach 1:
A roller assembly is introduced as an intermediary component between the inner boom and outer boom. This roller assembly includes multiple rollers arranged in a specific configuration that distributes the compressive forces across multiple contact points, preventing any single roller from bearing the full load and thereby reducing failure rates while maintaining smooth telescopic movement.
Solution Approach 2:
The guidance system is segmented from a single roller wheel contact into multiple rollers within the roller assembly. By dividing the load-bearing function across multiple rollers, the system reduces the stress on each individual roller, improving reliability while preserving the smooth operation of the telescopic mechanism.
2Length of moving object
If the inner boom is extended to its greatest extent under load, then the working tool can reach the ceiling for scaling operations, but compressive forces cause pressure on the roller wheels leading to equipment failure
Solution Approach 1:
The roller assembly introduces a multi-dimensional roller arrangement that distributes forces not only along the axial direction but also radially across multiple rollers. This spatial distribution of force paths allows the boom to extend to greater lengths under load without concentrating excessive compressive forces on any single roller, thereby maintaining both extension capability and structural strength.
3Device complexity
If traditional roller guidance is used, then the structure remains simple, but the compressive forces cause frequent equipment repair and operational delays
Solution Approach 1:
Multiple rollers are merged into a single integrated roller assembly unit that is attached to the inner boom as one component. This merging approach maintains relative structural simplicity while achieving improved load distribution, thereby reducing equipment failures and operational delays without significantly increasing device complexity.
Data Source
AI summary
A telescopic boom broadly comprises an elongated hollow outer boom, an elongated inner boom telescopically received within the outer boom, and a guidance structure for guiding the inner boom for telescopic movement is provided. The guidance structure includes a plurality of guide rails attached to the interior corners of the outer boom, a first roller assembly attached to one end of the inner boom, a second roller assembly attached to one end of the outer boom, and a mid roller assembly positioned proximal to the second roller assembly. The first roller assembly includes a plurality of wheels mounted on axles for engaging the guide rails. The second roller assembly includes roller bars positioned on opposed sides of one end of the outer boom for guiding the inner boom during telescopic movement. The mid roller assembly includes a third roller bar that engages guide rails positioned on the inner boom.