Eccentric Floating Magnet Bit Holder for Heavy Screw Torque
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Solution Overview
Problem
Existing bit holders struggle to securely hold and drive longer and heavier screws due to limitations in magnetic force, which prevents effective torque transmission and secure screw positioning.
Innovation Solution
A bit holder with an eccentrically arranged magnet that floats relative to the bit receptacle, allowing the magnet's pole face to align with the screw head's contour, providing enhanced magnetic engagement and torque transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If a magnetic bit holder is used to hold screws, then small and light screws can be securely held, but longer and heavier screws cannot be held securely
Solution Approach 1:
The magnet is designed to move dynamically relative to the bit receptacle, allowing it to adapt its position and orientation to match the contour of different screw heads. This dynamic adjustment capability enables the magnetic field to effectively engage with screws of varying lengths and weights, resolving the contradiction between magnetic holding force and screw length.
Solution Approach 2:
The patent changes the physical parameters of the magnetic system by allowing the magnet's position and orientation to vary. By adjusting these parameters dynamically, the system can maintain effective magnetic engagement with screws of different dimensions, thereby overcoming the limitation of fixed magnetic holding force for longer and heavier screws.
2Device complexity
If a fixed magnet is used in the bit holder, then the structure is simple, but the magnet cannot adapt to different screw head contours
Solution Approach 1:
The magnet holder is designed with dynamic characteristics, allowing the magnet to move and adjust its position relative to the bit receptacle. This dynamic structure enables the magnet to adapt to different screw head contours while maintaining a relatively simple overall device design, thus resolving the contradiction between structural simplicity and adaptability.
3Power
If high torque is transmitted during screw driving, then efficient fastening is achieved, but the risk of screw and bit separation increases
Solution Approach 1:
The dynamically adjustable magnet maintains optimal engagement with the screw head during torque transmission. By adapting its position in real-time, the magnet ensures stable magnetic connection that can withstand high torque forces without causing screw-bit separation, thus resolving the contradiction between power transmission and connection stability.
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 proposed bit holder securely positions and drives screws of various sizes, including longer and heavier ones, by ensuring torque-locked engagement in the screw head's rotary driver contour, minimizing the risk of screw and bit separation.
Implementation Method 1
holding screws to the bit by magnetic force is limited to small and light screws
Implementation Method 2
the pole face of the at least one magnet can be aligned according to the contour of the screw head
Data Source
AI summary
A bit holder for holding and driving a screw with a screw head into a fastening base, comprising a clamping region for connecting the bit holder to a driving tool and a bit receptacle for inserting a bit suitable for driving the screw. The bit holder has at least one magnet arranged eccentrically relative to the bit holder with one pole facing the screw head. The at least one magnet is held floating on a magnet holder in relation to a bit held in the bit receptacle, so that the pole face of the magnet can align according to the contour of the screw head in order to hold the screw on the bit holder in such a way that the bit engages torque-locked in a rotary driver contour of the screw head.