Keyless Chuck Anti-Vibration Assembly for Stable Sleeve Locking
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Solution Overview
Problem
Keyless chucks on power drivers vibrate during operation, leading to over-tightening and difficulty in opening by hand, especially in drilling operations, due to inertial forces transferring between the sleeve and nut, causing incremental tightening or loosening issues.
Innovation Solution
An anti-vibration assembly is integrated between the sleeve and nut, creating friction or drag to prevent movement out of locked or unlocked positions, absorbing vibrations and maintaining the sleeve's position relative to the nut, thereby preventing over-tightening or unintended loosening.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the sleeve and nut are directly coupled without anti-vibration features, then the structure is simple, but vibration causes incremental tightening or loosening leading to over-tightening or unintended loosening
Solution Approach 1:
An anti-vibration assembly is introduced as an intermediary component between the sleeve and nut. This assembly includes a sleeve, nut, and anti-vibration elements (such as dampers or friction elements) that mediate the interaction between the rotating sleeve and the nut, preventing direct transmission of vibration-induced inertial forces while maintaining the operational coupling.
Solution Approach 2:
The patent converts the harmful vibration and inertial forces into a beneficial friction-based locking mechanism. The anti-vibration assembly utilizes friction between components to counteract the inertial forces generated during vibration, transforming the problematic vibrational energy into a stabilizing force that maintains consistent gripping.
2Reliability
If the anti-vibration assembly uses friction or drag to prevent movement, then vibration is absorbed and gripping consistency is maintained, but the assembly requires additional components increasing complexity
Solution Approach 1:
The anti-vibration assembly may incorporate flexible elements or thin film dampers that provide friction-based vibration damping without requiring complex mechanical structures. These flexible components absorb vibrational energy through deformation and friction, maintaining reliability while minimizing assembly complexity.
3Ease of operation
If the sleeve rotates freely relative to the nut during operation, then the chuck can be opened and closed, but vibration causes the sleeve to move out of locked positions leading to over-tightening
Solution Approach 1:
The anti-vibration assembly is pre-configured to counteract vibration-induced forces before they can cause the sleeve to move out of its locked position. The friction and drag elements are designed to engage proactively during normal operation, creating a preliminary counter-force that prevents the inertial forces from displacing the sleeve, thus maintaining position stability while allowing intentional operation.
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 anti-vibration assembly effectively reduces vibration and maintains the chuck's position, ensuring consistent gripping and releasing of tool shanks, preventing over-tightening and unintended loosening, thus enhancing operational reliability.
Implementation Method 1
An anti-vibration assembly is integrated between the sleeve and nut, creating friction or drag to prevent movement out of locked or unlocked positions
Implementation Method 2
absorbing vibrations and maintaining the sleeve's position relative to the nut
Data Source
AI summary
A chuck (600) for use with a powered driver having a rotatable drive shaft is provided. The chuck may include a body, a plurality of movable jaws (610), a nut (625), a sleeve (640), and an anti-vibration assembly (620). The anti-vibration assembly may be operably disposed between the sleeve and the nut and configured to absorb vibration caused by operation of the power driver and maintain a position of the sleeve relative to the nut when the sleeve is in at least a locked position.