Rotating Sleeve Bit Holder for Surface Marring Prevention
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Solution Overview
Problem
Conventional bit holders often mar surfaces due to physical contact during operation, especially when the tool bit length is shorter than the access point, and they lack effective anti-marring features, particularly when used with tool bits of varying lengths.
Innovation Solution
A bit holder design featuring a freely rotating sleeve assembly with an inner and outer sleeve, where the outer sleeve can be moved to disengage the tool bit, and integrated magnets for retention, allowing the tool bit receiver body to rotate independently of the sleeve, thus preventing surface contact and accommodating tool bits of different lengths.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional bit holder is used, then the tool bit can be retained and rotated for working, but the bit holder may come into physical contact with the surface and mar it
Solution Approach 1:
The bit holder is segmented into two independent rotating components: an inner body that rotates with the tool bit and an outer sleeve that remains stationary. This segmentation allows the tool bit to rotate for working while the outer sleeve prevents surface contact, thereby protecting the surface from marring.
Solution Approach 2:
The outer sleeve acts as an intermediary between the rotating tool bit and the surface. It provides a non-contact interface that allows the tool bit to perform its function while preventing direct contact with the surface, thus eliminating the harmful marring effect.
2Ease of manufacture
If the bit holder structure is simplified, then manufacturing is easier, but the ability to accommodate tool bits of varying lengths is reduced
Solution Approach 1:
The bit holder design incorporates a universal outer sleeve that can accommodate tool bits of varying lengths. The sleeve's structure allows it to work with different bit lengths without requiring different holder configurations, thereby providing multi-functionality while maintaining manufacturing simplicity.
3Device complexity
If the sleeve is fixed to the tool bit receiver body, then the structure is simpler, but the sleeve cannot prevent surface contact during rotation
Solution Approach 1:
The bit holder is segmented into two independent rotating components: an inner body that rotates with the tool bit and an outer sleeve that remains stationary. This segmentation allows the tool bit to rotate for working while the outer sleeve prevents surface contact, thereby protecting the surface from marring.
Solution Approach 2:
The design introduces dynamic independence between the inner body and outer sleeve, allowing them to rotate at different rates or remain stationary relative to each other. This dynamic relationship enables the outer sleeve to remain stationary and protect the surface while the inner body rotates to perform the working function.
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 effectively prevents surface marring by decoupling the sleeve from the tool bit receiver body's rotation, ensuring the bit holder operates without damaging surrounding surfaces and securely retains tool bits of various lengths, enhancing operational safety and ease of bit changes.
Implementation Method 1
integrated magnets for retention
Data Source
AI summary
A bit holder is provided including a tool bit receiver body operably configured to receive at least a portion of a tool bit, a retention element configured to retain the tool bit engaged within the tool bit receiver body, a release configured to disengage the retention element enabling removal of the tool bit, a drive element operably coupled to the tool bit receiver body and configured to transfer axial rotation from a driving tool to the tool bit receiver body, and a sleeve disposed around at least a portion of the bit holder and configured such that the tool bit receiver body rotates independent of the axial rotation of at least a portion of the sleeve.