Disc Lever Mechanical Trimming Device for Micro-Positioning
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Solution Overview
Problem
Mechanical systems with components made from different materials often face challenges with mechanical tolerances, particularly in micro-positioning applications where adjustments can be costly or destructive, and existing trimming methods like screws with opposing threads are expensive and space-consuming.
Innovation Solution
A mechanical trimming device using an adjustable screw with a disc member that acts as a lever, allowing for precise adjustment of a second body relative to a first body with a substantially smaller motion than the screw, and optionally connected to a temperature compensation element for ambient temperature changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a screw with opposing threads is used for mechanical trimming, then adjustment precision can be improved, but device cost and space requirements increase
Solution Approach 1:
The patent introduces a disc member as an intermediary element between the screw and the body being adjusted. The disc member acts as a lever that amplifies the screw's rotational motion into precise linear displacement of the body, achieving high adjustment precision without requiring complex opposing thread mechanisms
Solution Approach 2:
The patent replaces the complex mechanical opposing thread system with a simpler screw-disc lever mechanism. The disc member functions as a mechanical lever that converts the screw's rotational movement into precise linear adjustment, eliminating the need for costly and space-consuming opposing thread structures
2Manufacturing precision
If mechanical trimming is performed by directly moving the body, then adjustment can be achieved, but the motion required is too large for precise micro-positioning
Solution Approach 1:
The patent transforms the one-dimensional linear motion problem into a two-dimensional rotational-linear motion combination. The screw provides rotational motion that is converted by the disc member's lever action into precise linear displacement, effectively reducing the required motion distance in the adjustment direction while maintaining precision
3Adaptability or versatility
If different materials are used for components, then functional requirements can be met, but mechanical tolerance mismatches occur
Solution Approach 1:
The patent changes the mechanical parameter (motion distance) through the lever mechanism to compensate for tolerance variations arising from different materials. By amplifying the screw's small rotational displacement into precise body movement, the system can accommodate material tolerance differences while maintaining overall assembly precision
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
Provides a cost-effective and precise method for micro-positioning applications, such as laser beam control and semiconductor manufacturing, with adjustments in the micrometer range and secure locking to prevent unintended movement, while accommodating temperature changes.
Implementation Method 1
screwing a screw through a threaded hole, with the end of the screw pressing against a center of a disc member or washer, which by deformation acts as a lever against an adjacent body
Implementation Method 2
The temperature compensation element is in the form of a bi-metallic strip consisting of two metal layers 31, 32 with different expansion coefficients bonded together
Data Source
AI summary
A device for trimming the thickness of a mechanical body is disclosed. The trimming is performed by screwing a screw through a threaded hole and having the end of the screw pressing against the center of a disk element, which, by deformation, acts as a lever against an adjacent body.