Keyless Chuck Sleeve Biasing to Prevent Inertial Slip
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Keyless chucks on power drivers can lock or loosen unintentionally due to inertial forces during drilling operations, causing inconsistent tool grip.
Innovation Solution
Incorporation of a biasing element between the sleeve and nut to bias the sleeve toward a neutral position, limiting the transfer of inertial forces and preventing unintended tightening or loosening of the jaws.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a keyless chuck is designed to be tightened or loosened by hand or actuation of the driver motor, then ease of operation is improved, but reliability deteriorates due to unintentional locking or loosening from inertial forces
Solution Approach 1:
A biasing element (spring) is introduced as an intermediary between the nut and sleeve to absorb inertial forces. The spring acts as a mediator that decouples the direct force transmission path, allowing the chuck to maintain its hand-operated simplicity while preventing unintended jaw movement caused by sudden inertial loads during drilling operations
Solution Approach 2:
The biasing element provides beforehand cushioning by being pre-loaded in a compressed state. This pre-compression creates a cushioning effect that absorbs sudden inertial forces before they can transmit to the nut and cause unintended jaw tightening or loosening, thereby maintaining reliability without compromising ease of 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
Prevents unintentional locking or loosening of the chuck by absorbing inertial forces, ensuring consistent tool grip and operation stability.
Implementation Method 1
a biasing element disposed between the nut and at least a portion of the sleeve. The biasing element being configured to bias the sleeve toward a neutral position
Implementation Method 2
The biasing element limits an inertial force of the sleeve applied to the nut during operation of the powered driver
Data Source
AI summary
A chuck is provided for use with a powered driver having a rotatable drive shaft. The chuck includes a plurality of jaws movably disposed in passageways of a cylindrical body, a nut rotatably mounted about the body and in communication with the jaws such that rotation of the nut in a closing direction moves the jaws toward each other and rotation of the nut in an opening direction moves the jaws away from each other, and a sleeve rotatably mounted about the body. The sleeve is in communication with the nut such that rotation of the sleeve rotationally drives the nut. The chuck also including a biasing element disposed between the nut an at least a portion of the sleeve configured to bias the sleeve toward a neutral position. The biasing element limits an inertial force of the sleeve applied to the nut during operation of the powered driver.