Lead Screw Flexible Coupling With Resilient Dome Point Contact
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Solution Overview
Problem
Existing connecting structures between lead screws and moving parts of one-click flash measuring instrument stages suffer from rigidity issues, leading to deflection deformation and reduced precision over time, as well as high machining precision requirements and assembly difficulties.
Innovation Solution
A flexible connecting structure utilizing a resilient dome structure with point contact mechanisms, combining resilient and rigid point contacts, to absorb external forces and maintain precision, while reducing assembly complexities and machining precision requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If rigid and hard connection is used between lead screw nut and stage moving part, then connection firmness is improved, but machining precision requirement increases and assembly difficulty increases
Solution Approach 1:
The patent applies a flexible connection structure using a resilient connecting member (spring element) between the lead screw nut and stage moving part. This flexible connection allows relative movement and absorbs misalignment, eliminating the need for high machining precision while maintaining connection stability. The resilient member acts as a flexible element that compensates for dimensional variations and assembly tolerances.
2Strength
If rigid and hard connection is used between lead screw nut and stage moving part, then connection firmness is improved, but assembly difficulty increases
Solution Approach 1:
The resilient connecting member provides flexibility that accommodates assembly variations. The spring-based connection allows for easier assembly by absorbing positioning errors and requiring less precise alignment during the assembly process, while still providing firm connection during operation.
3Ease of operation
If resilient connection with spring steel is used between lead screw nut and stage moving part, then assembly ease is improved, but long-term precision deteriorates due to lead screw deflection
Solution Approach 1:
The patent employs a dynamic resilient connecting member that can adapt its stiffness characteristics. The spring element is designed with specific elastic properties that allow it to absorb transmission forces and prevent lead screw deflection, maintaining precision over time. The resilient connection dynamically responds to operational forces, providing both assembly ease and long-term precision.
4Reliability
If resilient connection with spring steel is used between lead screw nut and stage moving part, then reliability is improved, but lead screw deflection occurs over time affecting precision
Solution Approach 1:
The resilient connecting member acts as a cushioning element that absorbs transmission forces before they can cause lead screw deflection. By providing this protective cushioning effect, the system maintains both reliability and precision over time, as the spring element prevents excessive forces from affecting the lead screw's positional accuracy.
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 flexible connecting structure effectively eliminates external force impacts, maintains long-term precision, reduces assembly and machining complexities, and shortens manufacturing cycles, ensuring stable and reliable measurement precision.
Implementation Method 1
a flexible connecting structure utilizing a resilient dome structure with point contact mechanisms, combining resilient and rigid point contacts, to absorb external forces and maintain precision
Data Source
Figure 1~2
AI summary
The present invention provides a flexible connecting structure of a lead screw, including: a lead screw, a lead screw nut seat, a linear guide rail, an axial push block, a dome mounting connecting block, and a stage moving part, where the lead screw nut seat is mounted on the lead screw, the lead screw nut seat and the linear guide rail form a moving pair, the axial push block is mounted on the lead screw nut seat, the stage moving part is mounted on the dome mounting connecting block, the dome mounting connecting block is provided with a recess having a resilient dome structure, and the axial push block is provided with a convex insertion block, the insertion block being inserted into the recess having the resilient dome structure, and the resilient dome structure being in point contact with two sides of the insertion block. The present invention further provides a flash measuring instrument stage. The beneficial effects of the present invention are that: impact by an external transmission force of a moving shaft of the stage is well eliminated.