Collet Locking Shaft Assembly for Universal Gearmotor Adaptation
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Solution Overview
Problem
Conventional gearmotor systems face challenges in accommodating shafts with varying diameters, shapes, and lengths, as existing coupling mechanisms are often not calibrated to accept non-standard sizes, requiring frequent disconnection and re-calibration for size changes or cleaning, which complicates industrial applications.
Innovation Solution
A collet chuck system with a coupling shaft and lock nut provides quick changing capabilities, allowing for flexible attachment of various sized shafts through customizable collet and shaft combinations, enabling in-field upgrades and adaptability to different equipment requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional coupling mechanisms are used, then shaft attachment is possible, but the mechanism cannot accommodate shafts with varying diameters, shapes, and lengths
Solution Approach 1:
The collet mechanism is designed to universally accommodate shafts of varying diameters, shapes, and lengths through a single coupling interface. The collet's conical interior surface and adjustable clamping action enable it to grip different shaft configurations without requiring multiple specialized couplings, thus achieving multi-functionality in a single device.
Solution Approach 2:
The collet is designed with dynamic adjustability through the drawbar and locknut assembly, allowing the clamping force and collet position to be adjusted along the shaft length. This dynamic adjustment capability enables the same coupling mechanism to adapt to different shaft sizes and configurations, resolving the contradiction between versatility and complexity.
2Ease of operation
If conventional fixed coupling mechanisms are used, then shaft attachment is stable, but frequent disconnection and re-calibration is required for size changes or cleaning
Solution Approach 1:
The collet is pre-configured with an internal calibration feature that automatically aligns and calibrates the shaft upon insertion, eliminating the need for manual re-calibration during frequent size changes or cleaning operations. This preliminary calibration action embedded in the coupling mechanism greatly reduces the time and complexity of shaft changes.
Solution Approach 2:
The coupling mechanism is segmented into distinct functional components (collet, drawbar, locknut) that can be independently adjusted and quickly reconfigured. This segmentation allows for rapid shaft changes without requiring complete disassembly or complex re-calibration procedures, improving ease of operation while minimizing time loss.
3Manufacturing precision
If custom couplings are manufactured for each shaft size, then precise fit is achieved, but manufacturing complexity and cost increase
Solution Approach 1:
Instead of manufacturing different couplings for each shaft size, the invention uses parameter changes within a single collet design. The collet's conical geometry and adjustable clamping force allow it to precisely accommodate various shaft diameters and configurations by changing its dimensional parameters through adjustment, rather than requiring separate manufactured parts for each size.
Solution Approach 2:
A single universal collet design replaces the need for multiple custom-manufactured couplings. The collet achieves precise fit for different shaft sizes through its adjustable mechanism rather than through custom manufacturing, significantly simplifying production while maintaining manufacturing precision across various shaft configurations.
Data Source
AI summary
A universal driven shaft retaining system includes a collet chuck holder that circumferentially engages a collet chuck with substantially inward compression during inward co-linear movement of a drawing bar creating a clamping (locking) effect on an inserted driven shaft.