Quick-Change Collet With Spring Feedback for Secure Clamping
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Solution Overview
Problem
Traditional collets do not provide feedback to users when securing cutting tools, making it difficult to confirm proper clamping and potentially leading to tool damage or inefficiencies in machining operations.
Innovation Solution
A quick-change collet design that incorporates an outer nut with a collet bore and a spring system, where the spring's extension portions engage with the output shaft or outer nut to provide tactile and audible feedback during securement, indicating completion of the clamping process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If a traditional collet is used to secure cutting tools, then the collet structure is simple, but the user cannot receive feedback to confirm proper clamping
Solution Approach 1:
The patent applies the feedback principle by incorporating a spring mechanism that provides tactile and audible feedback to the user during the clamping process. As the outer nut is tightened, the spring compresses and releases at specific intervals, creating audible clicks and tactile sensations that inform the user of the clamping status. This resolves the contradiction by adding information feedback while maintaining relatively simple collet structure.
Solution Approach 2:
The spring acts as an intermediary element between the outer nut and the collet body. It mediates the transmission of tightening force and provides a mechanism for feedback generation. The spring's engagement and disengagement with the outer nut's features creates the feedback signal without requiring complex electronic or sensing systems, thus adding minimal structural complexity.
2Reliability
If the collet is tightened without feedback, then the operation is simple, but improper clamping may occur leading to tool damage
Solution Approach 1:
The spring-based feedback mechanism provides real-time information to the user about the clamping state through audible clicks and tactile sensations. This allows the user to confidently determine when proper clamping is achieved, improving reliability without significantly complicating the operation. The feedback is inherent to the mechanical operation itself, maintaining ease of use.
Solution Approach 2:
The collet system performs self-verification of proper clamping through the feedback mechanism. The spring's engagement features automatically indicate when the correct tightening state is reached, eliminating the need for external measurement tools or complex verification procedures. The system serves itself by providing built-in confirmation of proper operation.
3Ease of operation
If feedback mechanism is added to the collet, then user confidence is enhanced, but the device complexity increases
Solution Approach 1:
The feedback mechanism uses a simple spring-based mechanical system that provides tactile and audible signals during tightening. This approach enhances user confidence through direct sensory feedback without requiring complex electronics, sensors, or control systems. The feedback is generated naturally by the mechanical interaction between the spring and the outer nut features.
Solution Approach 2:
The spring is a simple, inexpensive mechanical component that can be easily replaced if needed. Using a basic spring rather than a complex electronic feedback system keeps the overall device complexity low while still providing the necessary user confidence. The simplicity of the spring mechanism allows for easy manufacturing and potential replacement.
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 collet design ensures secure engagement of cutting tools with tactile and audible feedback, reducing the risk of improper clamping and enhancing user confidence during machining operations.
Implementation Method 1
a spring having an extension portion engageable with an external part of an output shaft of the tool or an internal part of the outer nut to provide feedback to a user regarding securement of the collet
Data Source
AI summary
A collet for a tool including an outer nut having a grip and defining a collet bore configured to receive a chuck. The collet bore includes a collet engagement surface engageable with the chuck to selectively secure a tool accessory. The collet also includes a spring having an extension portion engageable with an external part of an output shaft of the tool or an internal part of the outer nut to provide feedback to a user regarding securement of the collet.