Drill Chuck Chip Removal via Centrifugal Ejection
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Solution Overview
Problem
Drill chips penetrating into the drill chuck impede drilling and reduce the service life due to abrasive wear, as existing solutions for chip removal are unpredictable and ineffective.
Innovation Solution
The drill chuck features angled guide grooves and a cover disk with strategically positioned chip-discharge holes, utilizing centrifugal force to radially divert and expel chips through angled particle-conveying surfaces and bumps, ensuring effective chip removal during drilling and jaw repositioning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-generated harmful factors
If chip-discharge holes are provided in the cover disk, then chips can be expelled from the drill chuck, but chip removal is unpredictable and ineffective
Solution Approach 1:
The patent applies preliminary action by providing angled particle-conveying surfaces on the jaws that actively guide and direct chips toward the chip-discharge holes during the drilling operation. This preliminary guidance ensures chips are reliably directed to the discharge path rather than randomly accumulating, making chip removal predictable and effective throughout the drilling cycle.
Solution Approach 2:
The patent implements self-service by designing the chip-discharge mechanism to automatically clear chips during normal operation without requiring external intervention. The angled surfaces and hole positioning enable chips to be self-propelled outward during jaw repositioning, and the system even includes features to prevent chip re-entry, creating a self-maintaining chip removal system.
2Ease of operation
If jaws are moved between open and closed positions, then tool clamping is achieved, but chip expulsion must be synchronized with jaw repositioning
Solution Approach 1:
The patent merges two functions into a single coordinated action: tool clamping and chip expulsion. The angled particle-conveying surfaces are positioned so that when jaws move between open and closed positions for tool clamping, the same jaw movement simultaneously drives chips outward through the chip-discharge holes. This merging ensures chip expulsion occurs automatically during necessary jaw repositioning operations.
Solution Approach 2:
The patent ensures continuity of useful action by designing the chip discharge mechanism to operate continuously during jaw movement. Rather than requiring separate chip removal steps, the angled surfaces maintain constant contact with chips during jaw repositioning, ensuring chips are continuously directed outward throughout the entire jaw travel cycle, maximizing chip expulsion efficiency.
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
This design effectively prevents chip accumulation, reduces wear, and extends the drill chuck's service life by ensuring consistent and efficient chip expulsion, even during overhead work, while maintaining a compact and cost-effective design.
Implementation Method 1
chips in the grooves are urged radially outward and axially rearward by centrifugal force during drilling
Implementation Method 2
the particles inside the drill chuck, in particular, to be conducted radially outward especially effectively during drilling
Data Source
AI summary
A drill chuck has a chuck body having a plurality of angularly spaced and axially extending but angled guide grooves each holding a jaw that is axially displaceable between an axially front closed position and an axially rear open position. Each jaw has an outer edge formed with external teeth, and also has an axially rearwardly directed rear face extending at an acute angle to a plane perpendicular to the axis. A ring rotatable on the body about the axis has an internal screwthread meshing with the teeth, and an adjustment sleeve rotationally coupled to the ring is rotatable to move the jaws between the open and closed positions. A cover disk on the rear end of the body is formed with respective throughgoing chip-discharge holes each having an inner end aligned with a respective one of the grooves and an outwardly open outer end.