Drill Chuck Indicator Mechanism for Clamping Status
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Solution Overview
Problem
Conventional drill chucks require a special tool for tightening and loosening, and users face difficulty in determining if the tool is sufficiently clamped during manual rotation, making it challenging to ensure proper engagement.
Innovation Solution
A drill chuck with an integrated indicator mechanism that includes a visual indicator member, compression member, and plate, which provides tactile and audible feedback when the tool is clamped, using a Belleville washer to convey the clamped state through a color change from red to green visible through a viewing window.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If manual tightening of the chuck sleeve is used, then the need for special tightening tools is eliminated, but the user cannot easily determine whether the tool is sufficiently clamped
Solution Approach 1:
The patent implements a feedback mechanism through the indicator assembly that provides real-time visual information about the clamping status. As the chuck sleeve rotates during tightening, the indicator mechanism translates the rotational movement into a visible indication (such as a color change or position change) that feedbacks to the user whether the tool is sufficiently clamped, resolving the information loss problem while maintaining manual operation ease
Solution Approach 2:
The patent employs color changes as a visual feedback mechanism in the indicator assembly. The indicator may change color (e.g., from red to green) as the chuck sleeve reaches the appropriate tightening position, providing intuitive visual information to the user about the clamping status without requiring additional tools or complex interfaces
2Loss of information
If an indicator mechanism is added to show clamping status, then the user can easily confirm tool engagement, but the device complexity increases
Solution Approach 1:
The patent merges the indicator mechanism with the existing chuck sleeve structure. The indicator assembly is integrated into the chuck body and rotates together with the chuck sleeve, sharing common rotational movement and structural elements. This merging approach provides the necessary clamping status information while minimizing additional complexity by reusing existing structural components
Solution Approach 2:
The chuck sleeve serves multiple functions: it provides the tightening motion to clamp the tool and simultaneously drives the indicator mechanism to display the clamping status. This multi-functionality reduces the need for separate dedicated indicator components, thereby limiting the increase in device complexity while still providing valuable information feedback
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
Enables users to confirm the clamping status easily, ensuring secure tool engagement without additional tools, providing a clear visual cue and feedback upon reaching the desired torque.
Implementation Method 1
compression member, and plate, which provides tactile and audible feedback when the tool is clamped, using a Belleville washer
Data Source
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AI summary
A power tool constructed in accordance to one example of the present teachings can include a housing (14) having a handle (16) and body portion (18). A motor (24) can be disposed in the body portion and a drive spindle (32) drivingly connected to the motor. A chuck (10) can comprise a chuck spindle (36) that supports a plurality of chuck jaws (70). A first sleeve (38) can rotationally communicate with the chuck jaws to move the chuck jaws between a clamping position and a non-clamping position. An indicator mechanism can be disposed on the chuck having a first and second visual indicator (136,138). The indicator mechanism (102) can move from a first position to a second position upon rotation of the first sleeve to a location that corresponds to a predetermined clamping force attained by the chuck jaws.