Self-Aligning Chuck With Centering Jaws for Bit Alignment
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Solution Overview
Problem
Conventional chucks with moveable jaws often misalign working bits during clamping, leading to delays and lost productivity, especially in manufacturing environments, as bits can fall into gaps between jaws and become unusable.
Innovation Solution
The chuck design incorporates bit alignment jaws that translate to maintain the working bit in a central position, preventing misalignment by filling gaps between clamping jaws and ensuring proper central engagement during tightening.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional chucks use moveable jaws to clamp working bits, then the chuck can adjust to various bit sizes, but gaps between jaws cause bits to misalign and fall into gaps
Solution Approach 1:
A centering jaw is introduced as an intermediary element between the clamping jaws and the working bit. This centering jaw fills the gaps between clamping jaws and guides the working bit to the center position before clamping occurs, preventing bit misalignment while maintaining the adjustability of the chuck for various bit sizes.
Solution Approach 2:
The centering jaw performs a preliminary action by establishing the working bit's central position before the clamping jaws close onto the bit. This preliminary centering action ensures proper alignment is achieved prior to clamping, eliminating the misalignment problem that occurs with conventional jaw-only designs.
2Adaptability or versatility
If gaps exist between clamping jaws, then the chuck can accommodate different bit diameters, but working bits can fall into gaps and become misaligned
Solution Approach 1:
The centering jaw serves as a mediator that occupies the space between clamping jaws where bits might otherwise fall. It provides a reliable guiding surface that ensures bits are positioned correctly regardless of the gap size between clamping jaws, thereby maintaining positioning reliability across different bit diameters.
Solution Approach 2:
The jaw system is segmented into two functional types: clamping jaws that provide the adjustable gripping force for different bit sizes, and centering jaws that provide reliable positional guidance. This segmentation allows each component to specialize in its function, with clamping jaws handling size adaptation and centering jaws handling positioning reliability.
3Ease of operation
If bits become misaligned in gaps, then re-centering is required, but this creates delays and lost productivity
Solution Approach 1:
The centering jaw performs preliminary centering action automatically as the bit is inserted into the chuck, before the user needs to close the clamping jaws. This eliminates the need for manual re-centering operations that cause delays, allowing workers to simply insert the bit and proceed with clamping, thereby maintaining ease of operation while significantly improving productivity.
Solution Approach 2:
The centering jaw enables the bit to self-center within the chuck through its geometric design and positioning features. The bit automatically finds its correct central position guided by the centering jaw surfaces, without requiring user intervention or adjustment, thus eliminating productivity losses associated with manual re-centering operations.
Data Source
AI summary
A chuck configured to be operably coupled to a power driver having a rotatable drive spindle is provided. The chuck (100) may include a body (130) having a center axis (50) and a plurality of clamping jaws (101) configured to clamp onto a working bit. The clamping jaws (101) may be configured to angularly translate relative to the center axis towards or away from a clamping jaw point of convergence (154) to close or open a working bit opening defined by the clamping jaws (101). The clamping jaw point of convergence (154) may be on the center axis. The chuck (100) may also include a plurality of bit alignment jaws (150). The bit alignment jaws (150) may be configured to maintain the working bit within the working bit opening by being configured translate towards or away from a bit alignment jaw point of convergence (153) that is on the center axis (50) and disposed rearward of the clamping jaw point of convergence (154).