Oblique-Driven Platform Maintains Constant Displacement Resolution
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Solution Overview
Problem
Conventional micro/meso-scale drilling technologies, such as multi-axles machine tools and toggle-type positioning platforms, face challenges with high equipment costs, complex assembly, deformation under external loading, and varying displacement resolution, which affect precision and stability.
Innovation Solution
An oblique-driven platform structure is introduced, featuring a base, rails, screws, sliding blocks, and an oblique slide rod, where the oblique drive angle between the oblique slide rod and screw maintains a constant displacement resolution across varying screw stroke positions, eliminating the need for high-level servo mechanisms.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a toggle-type positioning platform is used to achieve high precision without high-level servo mechanisms, then manufacturing cost is reduced, but the displacement resolution varies with screw stroke position
Solution Approach 1:
The patent applies the dynamics principle by making the oblique slide rod adjustable in angle. The angle between the oblique slide rod and the screw can be dynamically changed to maintain a constant trigonometric relationship, thereby keeping the displacement resolution constant across different screw stroke positions. This dynamic adjustment capability resolves the contradiction between achieving high precision and maintaining constant resolution throughout the stroke range.
Solution Approach 2:
The patent utilizes parameter changes by modifying the geometric parameters of the mechanism. Specifically, the angle parameter of the oblique slide rod is adjusted to compensate for variations in displacement resolution. By changing this angular parameter, the system maintains a constant trigonometric relationship that ensures uniform displacement resolution across the entire screw stroke range, thus resolving the contradiction.
2Speed
If multi-axles machine tools with serial connected mechanism are used, then rapid operation and no back clearance are achieved, but the structure deforms or has displacement due to external loading or weight
Solution Approach 1:
The patent applies segmentation by dividing the positioning mechanism into modular components: a stable base structure, a screw-driven linear motion module, and an oblique slide rod module. This segmentation allows each component to perform its specific function optimally while reducing the cumulative deformation effects of a long serial chain, thus maintaining both rapid operation and structural stability.
Solution Approach 2:
The patent introduces a new dimensional approach by using an oblique slide rod that moves in both linear and angular dimensions simultaneously. This dimensional change transforms the traditional single-axis linear motion into a coupled motion that provides inherent stiffness and stability while maintaining rapid response, effectively resolving the contradiction between speed and structural stability.
3Manufacturing precision
If conventional servo system of serial connected mechanism is used for higher precision, then sub-micron or nano-meter scaled precision is achieved, but equipment cost increases
Solution Approach 1:
The patent replaces complex high-level servo mechanisms with a purely mechanical solution based on trigonometric relationships. By using the geometric relationship between the oblique slide rod and the screw, the system achieves sub-micron precision through mechanical advantage and geometric transformation rather than expensive servo control systems, thus resolving the contradiction between precision and cost.
Solution Approach 2:
The patent uses a simplified mechanical copying mechanism where the motion of the screw is transformed through the oblique slide rod into precise linear motion of the work platform. This mechanical copying approach achieves high precision without requiring complex servo systems, effectively reducing equipment cost while maintaining sub-micron 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 oblique-driven platform achieves high precision and stability in displacement resolution, maintaining constant feed rate and precision without high-level servo mechanisms, and allows for adjustable performance to meet various cutting requirements.
Implementation Method 1
a screw, disposed on the first rail; a first sliding block, disposed on the screw and able to slide along the first rail by way of the rotation of the screw
Implementation Method 2
an oblique slide rod, disposed on the second sliding block and partially accommodated in the accommodating groove, wherein an oblique drive angle is formed between the oblique slide rod and the screw
Data Source
AI summary
The present invention relates to an oblique-driven platform structure, comprising: a base, a first rail, a screw, a first sliding block, a second sliding block, an oblique slide rod, at least one second rail, at least one third sliding block, a work platform, and a motor. There is a trigonometric relation between the oblique slide rod, the screw and the second rail, and an oblique drive angle is formed between the oblique slide rod and the screw; Therefore, with the change of the stroke position of the screw, the displacement resolution of the work platform can still kept the same value when the work platform is driven. Moreover, the displacement of the screw stroke can be proportionally transformed to the feed rate of the work platform through the trigonometric relation, such that the driven work platform can get an extremely high displacement resolution without using any high-level servo motor.