Drill Chuck Support Ring for Concentricity and Vibration Control
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Solution Overview
Problem
Short drill chucks with locking units face issues of impaired concentricity and vibrations due to the protrusion of clamping jaws beyond the chuck body, which prevents the attachment of a sealing disk and affects service life.
Innovation Solution
A support ring is positioned between the mouths and cuts of the chuck body to radially support the clamping sleeve without covering the rear end, featuring a non-rotatably connected threaded ring with a spring-loaded locking member and a cylindrical section with a radial collar for secure attachment, ensuring concentricity and preventing unintentional opening of the clamping jaws.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the clamping jaws are guided to protrude beyond the rear end of the chuck body in the open position, then the clamping range is extended, but the concentricity is impaired and vibrations occur
Solution Approach 1:
A support ring is introduced as an intermediary component between the clamping sleeve and the chuck body. This support ring provides a stable mounting surface for the clamping sleeve, ensuring proper radial support and maintaining concentricity even when clamping jaws protrude beyond the chuck body rear end.
Solution Approach 2:
The support ring extends the functional structure into a new spatial dimension by protruding beyond the rear end of the chuck body in the axial direction. This allows the clamping sleeve to be properly supported while accommodating the protruding clamping jaws, effectively resolving the spatial conflict between extended clamping range and concentricity maintenance.
2Manufacturing precision
If a sealing disk is attached to the rear end of the chuck body, then the concentricity is improved, but the clamping jaws cannot be properly guided when protruding beyond the rear end
Solution Approach 1:
The chuck body structure is segmented into functional zones: the main chuck body for mounting, and an extended support ring portion for guiding the clamping jaws. This segmentation allows the sealing disk to be mounted on the main body while the clamping jaws are guided by the extended support ring, eliminating the conflict between sealing and jaw guidance functions.
3Manufacturing precision
If the clamping sleeve is radially supported on the chuck body, then the concentricity is maintained, but the structure becomes more complex
Solution Approach 1:
The support ring combines multiple functions into a single component: it provides radial support for the clamping sleeve to maintain concentricity, guides the clamping jaws in their movement, and extends beyond the chuck body to accommodate the protruding jaws. This merging eliminates the need for separate sealing disks and guidance structures, reducing overall structural complexity.
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 solution enhances concentricity, prevents vibrations, and simplifies assembly by providing a secure and stable connection between the clamping sleeve and the chuck body, while also preventing drill dust from entering the chuck.
Implementation Method 1
a locking member (16) which is supported radially on the clamping sleeve under the force of a spring
Data Source
Figure 1
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Figure 3
AI summary
The drill chuck (1) has a spindle accommodation portion (4) that is formed at rear end (3) of a chuck portion (2) inclined to chuck axis (5). The guide channels (6) are displaced and adjusted between an open position and a clamping position by the teeth portion with the clamping thread of the chuck portion. A threaded ring are rotatably guided and engaged to the chuck portion by the coaxial actuation. A support ring (17) is provided axially between opening portion (9) and cut portion (8), for the radial guidance of the clamping sleeve (13) to the chuck portion.