Drill Chuck With Magnetic Holder for Bi-Directional Needle Rotation
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Solution Overview
Problem
Drill needles are prone to breakage and can only be rotated in one direction due to traditional clamping mechanisms, limiting their operational flexibility and durability.
Innovation Solution
A drill chuck design featuring a hollow cylindrical magnet holder and a coupling device with a flattened end section for the drill needle, allowing bi-directional rotation and using a magnetic coupling to maintain central alignment, reducing the risk of breakage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a traditional clamping mechanism with multiple clamping elements is used to secure the drill needle, then the drill needle is held firmly against slippage, but the drill needle can only be rotated in one direction and is prone to breakage
Solution Approach 1:
The clamping mechanism is divided into two independent parts: clamping bodies that secure the drill needle against slippage, and a magnetic holder that provides contactless radial guidance. This segmentation allows the drill needle to be firmly held while enabling bi-directional rotation by decoupling the clamping function from the rotation restriction.
Solution Approach 2:
The traditional mechanical clamping system that restricts rotation is replaced with a magnetic coupling system. The magnetic holder provides radial guidance and torque transmission without mechanical contact, eliminating the rotation restriction while maintaining firm securing through the clamping bodies.
2Reliability
If a threaded connection is used to secure the drill needle, then the drill needle is held firmly, but the drill needle can only be turned in one direction without loosening
Solution Approach 1:
The threaded mechanical connection is replaced with a magnetic coupling system. The magnetic holder and magnetic coupling disc provide torque transmission and radial guidance without the rotational restriction inherent in threaded connections, enabling bi-directional rotation while maintaining firm securing through the clamping bodies.
3Reliability
If a magnetic holder with contactless radial guidance is used, then unbalanced rotation is compensated and central alignment is maintained, but the device complexity increases
Solution Approach 1:
The magnetic holder combines multiple functions into a single component: it provides contactless radial guidance to compensate for unbalanced rotation, transmits torque through magnetic coupling, and maintains central alignment of the drill needle. This merging reduces the need for separate mechanical guidance and torque transmission mechanisms.
Solution Approach 2:
Complex mechanical guidance systems with multiple moving parts are replaced with a magnetic field-based system. The magnetic holder and magnetic coupling disc provide radial guidance and torque transmission through magnetic forces, eliminating the need for mechanical contact and reducing device complexity.
4Adaptability or versatility
If a flattened end section is used instead of a thread, then the drill needle can rotate in both directions without loosening, but the clamping mechanism becomes more complex
Solution Approach 1:
The clamping mechanism is segmented into simple clamping bodies that apply radial clamping force and a magnetic holder that provides axial positioning and torque transmission. This segmentation simplifies each component while enabling bi-directional rotation through the flattened end section配合 magnetic coupling.
Solution Approach 2:
The complex threaded clamping mechanism is replaced with a simplified system using a flattened end section and magnetic coupling. The magnetic holder provides the necessary holding force and torque transmission without requiring complex threading or multi-element clamping mechanisms.
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 design enables drill needles to be used in both directions of rotation while minimizing breakages by securing the needle against slipping and compensating for unbalanced rotation, ensuring reliable operation and extended tool life.
Implementation Method 1
the hollow cylindrical magnet holder (13) is designed to radially guide the receiving element (7) without contact, so that the unbalanced rotation which occurs during the drilling operation can be compensated for or tolerated
Implementation Method 2
the coupling device (8, 9) is designed as a magnetic coupling, so that torque can be transmitted contactlessly from the drive device (11) to the drill needle holding device (7)
Data Source
Figure 1
Figure 2~9
Figure 3
AI summary
The invention relates to a drill chuck which has a drilling needle receptacle device for removable receiving of a drilling needle (1), a hollow cylindrical magnetic holder for the drilling needle receptacle device and a coupling device for torque transfer from a drive device to the drilling needle receptacle device. The drilling needle receptacle device, in which a drilling needle (1) having a flattened end section (1') can be received, has a receptacle element (7), at least two clamping bodies (10) and a clamping insert (6). The receptacle element (7) has at least one cylindrical section (72) having a recess (71) and the clamping insert (6) has counter-molded bodies (61) which supplement the clamping bodies (10) and which extend away from a stop disc (62). The stop disc (62) contacts a face of the cylindrical section (72) and has a lead-through opening (63) for the drilling needle (1). The counter-molded body (61) and the clamping bodies (10) are designed in respect of the dimensions and shape thereof for arrangement in the recess (71) and for clamping receiving of the flattened end section (1') of the drilling needle (1) between the clamping bodies (10) and the counter-molded bodies (61). The invention further relates to a drilling needle and to a drilling needle-drill chuck assembly.