Segmented Plastic Conveying Helix for Quieter Drilling
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Solution Overview
Problem
Existing drilling devices with metal conveying helices face challenges in noise pollution, weight, and ease of maintenance due to their material properties and the need for complete replacement when individual components wear out.
Innovation Solution
A drilling device with a conveying helix subdivided into segments made from plastics material, allowing for easy replacement and mounting, featuring a form-fitting connection and elastomer ring for securement, which reduces noise and weight while improving handling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a metal conveying helix is used, then the conveying helix has high strength and durability, but it causes noise pollution and increases weight
Solution Approach 1:
The patent changes the material parameter from metal to plastics, fundamentally altering the physical properties of the conveying helix. This material substitution reduces noise emission and weight while maintaining sufficient mechanical strength for the application, directly resolving the contradiction between strength and noise pollution.
Solution Approach 2:
The conveying helix is designed as a composite structure with a plastics base material reinforced by integrated metal insert parts. This composite approach combines the low-noise, lightweight properties of plastics with the high strength and wear resistance of metal, achieving both noise reduction and mechanical durability simultaneously.
2Strength
If a metal conveying helix is used, then the conveying helix has high strength, but it increases thermal heating during operation
Solution Approach 1:
The patent changes the material parameter from metal to plastics, which fundamentally alters thermal conductivity. Plastics have inherently lower thermal conductivity than metal, reducing heat generation and thermal heating during operation while maintaining sufficient mechanical strength for the conveying function.
3Device complexity
If the conveying helix is made as a single piece, then it has simple structure, but it requires complete replacement when any part wears out
Solution Approach 1:
The patent divides the conveying helix into modular segments that can be independently replaced. Each segment is designed as a separate replaceable unit with standardized connection features, allowing worn segments to be quickly swapped out without replacing the entire conveying helix, thus improving ease of repair while maintaining structural simplicity through standardization.
Solution Approach 2:
The patent implements a segment replacement strategy where worn conveying helix segments are discarded and replaced with new or refurbished segments. This approach recovers the value of still-serviceable segments and reduces maintenance costs compared to complete replacement, while the modular design enables efficient segment-level maintenance.
4Object-affected harmful factors
If the conveying helix segments are made from plastics material, then noise is reduced and weight is decreased, but strength may be compromised
Solution Approach 1:
The conveying helix segments are constructed as composite structures with a plastics matrix reinforced by integrated metal insert parts. The metal inserts are positioned at critical stress points and wear zones, providing localized strength enhancement while the plastics material maintains the overall low-noise, lightweight characteristics. This composite approach resolves the strength concern while preserving the noise and weight advantages.
Solution Approach 2:
The patent applies different material properties to different regions of the conveying helix segment. The plastics material is used for the bulk structure where low noise and weight are priorities, while metal insert parts are strategically placed in areas requiring high strength and wear resistance. This local differentiation of material quality optimizes performance across all requirements.
Data Source
AI summary
A drilling device includes a drill basic body and a conveying helix which runs helically around the drill basic body. The conveying helix is subdivided into a plurality of conveying helix segments that are disposed next to one another. The conveying helix segments may be disposed loosely next to one another.