Insertion Tool Fastening Region Coding for Operator Safety
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Solution Overview
Problem
Existing insertion tools for oscillating and/or rotatory movements lack a secure, cost-effective, and operator-friendly coupling mechanism that prevents unsuitable tool holding fixtures from being used, leading to increased wear and reduced service life.
Innovation Solution
The insertion tool features a fastening region with a continuous material extent in the radial direction, devoid of recesses and fastening elements, and incorporates a coding element for secure interlocking, ensuring compatibility with suitable tool holding fixtures, thereby enhancing operator safety and tool longevity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a centering fastening recess is provided in the fastening region, then coupling to the tool holding fixture is enabled, but the mass moment of inertia is reduced and operator safety is compromised
Solution Approach 1:
The invention removes the centering fastening recess from the fastening region, extracting the harmful element that compromised operator safety. The fastening region is designed to be free of recesses in the radial direction within the circle, eliminating the risk of hand insertion while maintaining coupling functionality through alternative means.
Solution Approach 2:
The coupling mechanism is segmented into distinct functional elements: the continuous fastening region for structural integrity and operator safety, the coding element for compatibility verification, and the fastening elements arranged on a circle for mechanical coupling. This segmentation allows each element to perform its specific function without compromising overall safety.
2Stability of the object's composition
If multiple fastening elements are arranged on a circle around the drive axis, then coupling stability is improved, but the structural complexity of the fastening region increases
Solution Approach 1:
While the fastening elements are arranged symmetrically on a circle for stability, the overall fastening region maintains asymmetry by being free of recesses in the radial direction. The coding element introduces intentional asymmetry to ensure proper orientation and compatibility, resolving the conflict between symmetric stability and structural simplicity.
3Reliability
If a coding element is added to the fastening region, then operator safety and compatibility are improved, but manufacturing complexity increases
Solution Approach 1:
The coding element is merged with the fastening region as an integrated component rather than a separate part. This combining approach ensures compatibility verification while minimizing manufacturing complexity, as the coding element can be formed during the same manufacturing process as the fastening region itself.
4Ease of operation
If the fastening region is designed free of recesses in the radial direction, then operator safety is enhanced, but coupling mechanism complexity increases
Solution Approach 1:
The invention converts the potential harm of a simple recess structure (which enables operator injury) into a benefit by designing the fastening region to be free of recesses. The continuous material extent in the radial direction within the circle protects operators while the coding element and circular fastening elements provide the necessary coupling functionality.
Data Source
AI summary
An insertion tool includes at least one machining region, and at least one fastening region. The at least one fastening region is configured to couple to at least one tool holding fixture of a handheld machine tool, and has at least two fastening elements arranged substantially into a circle around a drive axis. The at least one fastening region is further configured to be at least substantially free of recesses in a radial direction within the circle.