Magnetic Collet Chuck Alignment for Stable Tool Bit Pre-Tightening
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Solution Overview
Problem
Existing drill chucks face issues with unstable pre-tightening force, poor aligning efficiency, and unsafe operation, particularly when handling smaller tool bits, leading to manual handling challenges and potential tool bit damage.
Innovation Solution
A chuck design featuring a sleeve, chuck body, and adjustable mechanism with locating members and a pushing mechanism that aligns and clamps tool bits automatically, using a combination of elastic and magnetic components to ensure precise alignment and stable clamping without manual intervention.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If spring leaves are used for pre-tightening the tool bit, then the tool bit can be automatically aligned, but the pre-tightening force becomes unstable and insufficient for smaller tool bits
Solution Approach 1:
The patent replaces the mechanical spring leaf system with a magnetic field-based locating member. The locating member generates a magnetic field that automatically attracts and centers the tool bit during insertion, providing stable and reliable pre-tightening force without the deformation issues inherent in mechanical spring systems.
Solution Approach 2:
The patent changes the physical state from mechanical elastic force to magnetic field interaction. By utilizing magnetic field strength and attraction force as the controlling parameter, the system achieves consistent pre-tightening force that does not degrade over time like mechanical springs.
2Manufacturing precision
If the clamping jaws move a larger distance to clamp smaller tool bits, then the tool bit can be secured, but the alignment time increases and operation efficiency decreases
Solution Approach 1:
The patent implements preliminary alignment action through the locating member before the clamping jaws engage. The magnetic locating member centers the tool bit during insertion, so when the clamping jaws subsequently move into position, they immediately grasp the pre-aligned tool bit, eliminating the need for prolonged manual holding and reducing total operation time.
3Strength
If the spring leaves are in a naturally closed state, then they can provide elastic pre-tightening force, but the tool bit cannot be easily aligned and may be inserted into gaps causing damage
Solution Approach 1:
The patent replaces the closed mechanical spring leaf structure with an open magnetic field-based locating member. The magnetic field extends outward to guide and attract the tool bit during insertion, making alignment intuitive and easy while maintaining strong pre-tightening force through magnetic attraction rather than elastic closure.
4Force
If magnets are disposed on the jaw to enhance adsorption force, then the tool bit can be held more securely, but the jaw strength is reduced and the structure becomes more complex
Solution Approach 1:
The patent extracts the magnetic function from the clamping jaw structure itself and places it in a separate locating member. This separation allows the jaw to maintain its structural integrity and strength while the locating member provides the magnetic adsorption force, avoiding the need to compromise jaw strength for magnetic functionality.
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 provides a convenient, safe, and precise aligning and clamping process, eliminating the need for manual handling and ensuring stable pre-tightening force, even for smaller tool bits, thereby enhancing operational efficiency and safety.
Implementation Method 1
at least one elastic member disposed between the locating member and the chuck body, the elastic member pushing the locating member to extend into the shaft cavity
Implementation Method 2
at least one jaws of the chuck is provided with a magnet and the rear end of the tool bit is also provided with a magnet, so that the tool bit can be attached to the jaws by the action of the magnetic force between the two magnets on the jaw and the tool bit
Data Source
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AI summary
The invention relates to a chuck having a sleeve, a chuck body, a plurality of chuck jaws, an adjusting mechanism configured to adjust relative movement between the chuck jaws and the chuck body, at least one locating member and a pushing mechanism. The locating member is disposed on the chuck body between the adjacent chuck jaws. When the adjusting mechanism drives the chuck jaws to approach to each other relative to the longitudinal axis, the pushing mechanism pushes the locating member to move towards the longitudinal axis. When the adjusting mechanism drives the chuck jaws to move away from each other relative to the longitudinal axis, the pushing mechanism pushes the locating member to move away from the longitudinal axis. Therefore, the operation is more convenient and safer; the aligning effect is precise and reliable, and the pre-tightening force is stable.