Davit Bearing Assembly With Offset Bores for Portable Mounting
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Solution Overview
Problem
Existing davits lack a reliable mechanism to indicate when they have been overloaded, potentially leading to unsafe operation due to hidden damage, and require easy assembly and disassembly for portability without compromising safety.
Innovation Solution
The davit incorporates a bearing system with offset bores to securely couple the column to the shaft, allowing rotation, and a telescoping jib design with an overload indicator that deforms visibly when exceeding weight limits, ensuring safety and ease of use.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the davit is made portable with easy assembly and disassembly, then ease of operation is improved, but reliability may worsen due to potential compromise in structural integrity
Solution Approach 1:
The davit is divided into modular components (column, jib, bearing assembly) that can be independently assembled and disassembled. The bearing itself is a separate replaceable component that couples the column to the shaft, allowing portable assembly without compromising the integrity of individual structural elements.
Solution Approach 2:
The bearing acts as an intermediary component between the column and shaft, providing a reliable rotational coupling mechanism. This intermediate element ensures that even when assembled portably, the structural integrity and rotational functionality are maintained through a dedicated coupling device.
2Manufacturing precision
If the bearing uses a fixed bore configuration, then manufacturing precision is improved, but adaptability worsens when mounting to different shaft diameters
Solution Approach 1:
The bearing incorporates adjustable elements that allow the bore configuration to adapt to different shaft diameters. The offset bore positions can be selectively used or adjusted, transforming a static bearing design into a dynamically adaptable one that maintains precision across various mounting scenarios.
Solution Approach 2:
The bearing is designed with multiple pairs of offset bores that can accommodate different shaft diameters and mounting requirements. This universal design allows the same bearing component to serve multiple functions across different davit configurations, maintaining manufacturing precision while achieving versatility.
3Ease of operation
If the jib is made telescoping for portability, then ease of operation is improved, but device complexity increases
Solution Approach 1:
The jib employs a telescoping design where inner sections nest within outer sections, allowing the structure to collapse to a compact size for portable transportation. This nesting arrangement achieves portability while keeping the mechanism relatively simple by using concentric tubular structures.
Data Source
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AI summary
A bearing (100) for allowing a column (102) of a davit to be rotatably mounted on a substantially upright shaft. The bearing has a body (1002) shaped to correspond to an internal profile of the column (102). The body has a first bore (1004) for receiving a component on which the bearing bears and a first pair of parallel, spaced second bores (1006A, 1006B), narrower than the first bore, which extend across the first bore in a direction perpendicular to an axis of the first bore and are configured to receive retaining pins which engage with a groove in the component received in the first bore. A single bearing can be used to rotatably couple the davit to the shaft, or king post, with a plurality of different-spaced bores to account for different diameters of shaft. This improvement allows the davit to be manufactured easily and erected easily by users.