Spherical Surface Link Mechanism With Coupled Hubs for Rigidity
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Solution Overview
Problem
The parallel link mechanism lacks rigidity due to uncoupled intermediate link members, limiting its operational efficiency and accuracy.
Innovation Solution
A spherical surface link mechanism with coupled intermediate link hubs and a shaft member, allowing rotation about a common axis, and incorporating bearings to reduce friction, enhancing the rigidity and operational stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If intermediate link members are not coupled to one another, then the structure is simpler and easier to manufacture, but the rigidity of the mechanism is insufficient
Solution Approach 1:
The patent couples multiple intermediate link members together through intermediate link hubs that are connected by a shaft member, forming an integrated rigid structure. This merging of previously separate components directly addresses the rigidity deficiency while maintaining manufacturing simplicity through standardized coupling interfaces.
2Manufacturing precision
If intermediate link members are coupled together with shaft member and bearings, then the rigidity and positioning accuracy are improved, but the device complexity increases
Solution Approach 1:
The patent introduces intermediate link hubs as intermediary components that connect the intermediate link members through a shaft member. These hubs serve as mediators that enable precise positioning and accurate movement transmission while distributing the structural complexity across multiple standardized components rather than requiring a single complex assembly.
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
The mechanism achieves improved rigidity and positioning accuracy, reducing displacement and increasing the safety factor, while simplifying the structure and reducing manufacturing costs.
Implementation Method 1
a bearing that reduces friction between at least one of the plurality of intermediate link hubs and the shaft member
Data Source
AI summary
A spherical surface link mechanism includes a proximal end link hub, a distal end link hub, a plurality of links, a plurality of intermediate link hubs, and a shaft member. Each of the plurality of links includes a first end link member, a second end link member, and an intermediate link member. The first end link member is coupled, at one end, to the proximal end link hub to be rotatable about a first rotation axis. The second end link member is coupled, at one end, to the distal end link hub to be rotatable about a second rotation axis. The intermediate link member is coupled, at one end, to the other end of the first end link member to be rotatable about a third rotation axis and is coupled to, at the other end, the other end of the second end link member to be rotatable about a fourth rotation axis.