Rotatable Sunshade Umbrella Base with Bearing Support
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Solution Overview
Problem
Conventional sunshade umbrellas with rotating support rods and canopies have a large volume and weight, leading to instability and high resistance during rotation, making the operation strenuous for users.
Innovation Solution
A sunshade umbrella with a hand-held portable rotatable base mechanism featuring a base assembly with fixed upper and lower base plates, a support assembly with a rotatably sleeved support column and tube, and a rotation locking mechanism, which stabilizes the support column and reduces shaking during rotation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the support rod and canopy are made large and heavy to provide sufficient shade area, then the shade coverage is improved, but the base becomes unstable during rotation and the rotation resistance increases
Solution Approach 1:
The support assembly is segmented into multiple components: support rod, support tube, bottom tube bearing seat, and positioning blocks. This segmentation allows each component to perform its specific function - the bearing seat and positioning blocks provide stability while the support rod and tube enable rotation, resolving the contradiction between stability and rotation capability.
Solution Approach 2:
The bottom tube bearing seat acts as an intermediary component between the support column and the support tube. It provides a stable mounting point for the support tube while being fixed to the base, thereby maintaining base stability during rotation operations.
2Area of stationary object
If the support rod and canopy are made large and heavy to provide sufficient shade area, then the shade coverage is improved, but the rotation resistance becomes large and operation becomes strenuous
Solution Approach 1:
The bottom tube bearing seat serves as a mediator that reduces friction between the rotating support tube and the fixed base structure. By introducing this bearing component, the rotation resistance is significantly reduced, making operation easier despite the large canopy size.
Solution Approach 2:
The patent replaces direct friction-based rotation with a bearing-based rotation system. The bottom tube bearing seat introduces a more efficient mechanical interface that reduces resistance and makes rotating the large canopy much easier for the user.
3Adaptability or versatility
If the support rod is allowed to rotate freely with the canopy, then the rotation function is achieved, but the support rod shakes during rotation
Solution Approach 1:
The positioning blocks act as intermediaries that provide stable support to the support tube during rotation. These blocks are fixed to the bottom tube bearing seat and engage with the support tube, preventing excessive movement and shaking while still allowing smooth rotation.
Solution Approach 2:
The patent changes the rotational parameters by introducing controlled friction through the positioning blocks and bearing seat. This provides just enough resistance to prevent shaking and instability, while maintaining smooth rotation capability. The friction parameter is optimized to balance stability and rotation ease.
Data Source
AI summary
A sunshade umbrella with a hand-held portable rotatable base mechanism includes a base assembly, a support assembly arranged on the base assembly and a canopy assembly arranged on the support assembly. The base assembly includes an upper base plate and a lower base plate which are disposed in a center of the base assembly, and are fixedly fitted up and down. The support assembly includes a support column and a support tube. The support column is insertedly and fixedly connected to the upper and lower base plates, and the support tube is rotatably sleeved outside the support column.