Bearing-Less Jib Crane Mast for Reliable Load Alignment
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Solution Overview
Problem
Jib cranes experience operational reliability issues due to bearing failure, leading to increased equipment downtime as mechanical components deteriorate over time, affecting their ability to transfer loads efficiently.
Innovation Solution
The implementation of a bearing-less mast structure with a shaft mechanism and rod system that allows continuous rotation of the boom arm about a longitudinal axis, along with adjustable mechanisms for aligning loads, enhances operational reliability by minimizing friction and wear.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If bearings are used to facilitate jib crane rotation, then friction between moving parts is minimized, but bearing failure rates increase over time leading to reduced operational reliability
Solution Approach 1:
The patent removes bearings entirely from the jib crane rotation mechanism. The mast rotates within the base structure without any bearing components, eliminating the source of bearing failure while maintaining rotational functionality through direct contact between the mast and base structure.
Solution Approach 2:
The patent replaces the mechanical bearing system with a direct rotational interface between the mast and base structure. This substitution eliminates complex mechanical components while achieving the same rotational function through a simpler mechanical arrangement.
2Adaptability or versatility
If a fixed boom arm configuration is used, then the structure is simpler, but flexibility in aligning loads is reduced
Solution Approach 1:
The patent introduces an adjustable mechanism that allows the boom arm to change its angular orientation relative to the mast. This dynamic adjustment capability enables the boom arm to adapt to different load positions and alignment requirements while maintaining structural integrity.
Solution Approach 2:
The patent divides the boom arm assembly into separable components with adjustment mechanisms. The boom arm can be independently positioned and angled relative to the mast through discrete adjustment points, allowing flexible configuration without requiring complete structural redesign.
Data Source
AI summary
Techniques facilitating increased operational reliability for jib cranes are provided. In one example, a jib crane can comprise a mast, a shaft mechanism, and a rod. The mast can extend vertically from a base structure. The shaft mechanism can be disposed within the mast. The rod can be coupled to a boom arm and can be disposed within the shaft mechanism. Rotation of the rod can facilitate continuous rotation of the boom arm about a longitudinal axis of the rod with respect to the base structure.