Deformation Motion Mechanism Using Elastic Ring and Flexible Arms
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Solution Overview
Problem
Existing linear motion actuators face challenges in achieving high precision and structural robustness due to the complexity of reduction gearing mechanisms and the weakness of elastic plate-based mechanisms, which result in a lack of lightweight, miniaturized, and simply-manufactured solutions.
Innovation Solution
A deformation motion mechanism utilizing an elastic ring member with a drive unit and flexible arms to produce linear motion, where the drive unit is placed within the elastic ring member and connected through flexible arms to prevent rotation and maintain precision during elongation or contraction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If reduction gearing mechanism is used to achieve high precision linear motion, then precision is improved, but device complexity and number of parts increase
Solution Approach 1:
The patent extracts and eliminates the complex reduction gearing mechanism from the system, replacing it with a simplified elastic plate-based deformation mechanism. The elastic plates directly convert rotational motion to linear motion through controlled deformation, removing the need for gears, backlash adjustment, and multiple alignment operations while maintaining high precision.
Solution Approach 2:
The patent substitutes the traditional mechanical reduction gearing system with an elastic deformation-based mechanism. Instead of using rigid gears and mechanical transmission, the system uses the elastic deformation of plates to achieve motion conversion, significantly simplifying the mechanism while preserving precision.
2Device complexity
If multiple elastic plates are combined to eliminate gearing complexity, then device complexity is reduced, but structural strength decreases
Solution Approach 1:
The patent merges multiple elastic plates into a integrated structure where the plates work together as a unified deformation mechanism. The H-shaped and orthogonal plate configurations are combined to form a rigid yet flexible structure that maintains structural strength while enabling the desired motion transformation.
Solution Approach 2:
The patent introduces curved elastic plates (H-shaped configuration) instead of purely linear arrangements. The curvature provides both structural rigidity and elastic compliance, allowing the mechanism to maintain strength while achieving the necessary deformation for motion conversion.
3Ease of manufacture
If elastic plate mechanism is used to simplify assembly, then ease of manufacture is improved, but precision is reduced due to spatial arrangement weakness
Solution Approach 1:
The patent employs asymmetric elastic plate configurations (H-shaped plates combined with orthogonal plates) that are specifically designed to provide both structural strength and precise motion control. The asymmetric arrangement optimizes the deformation characteristics to achieve high precision while maintaining ease of manufacture.
Solution Approach 2:
The patent optimizes the geometric parameters of the elastic plates (thickness, length, curvature radius, arrangement angles) to achieve the desired balance between structural strength and deformation precision. By carefully selecting these parameters, the mechanism achieves high precision displacement while remaining simple to manufacture.
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
This solution enables precise and robust linear motion with reduced complexity and increased structural strength, allowing for a lightweight and miniaturized mechanism that achieves high precision displacement.
Implementation Method 1
an elastic ring member shaped symmetrically with respect to a center line, wherein one end of the elastic ring member is fixed and the other end is movable along the center line
Implementation Method 2
a feed screw engaged with both ends of the elastic ring member along an operating line orthogonal to the center line, to press or stretch the elastic ring member along the center line
Implementation Method 3
a plurality of flexible arms which connects the drive unit to the elastic member in at least a direction of the center line
Data Source
AI summary
A novel deformation motion mechanism with precise motion precise motion and structural robustness is achieved. A deformation motion mechanism includes: an elastic ring member shaped symmetrically with respect to a center line, wherein one end of the elastic ring member is fixed and the other end is movable along the center line; a drive unit which is placed within the elastic ring member and is arranged to rotate a feed screw engaged with both ends of the elastic ring member along an operating line orthogonal to the center line, to press or stretch the elastic ring member along the center line; and a plurality of flexible arms which connects the drive unit to the elastic member in at least a direction of the center line.