Articulating Rotary Cutting Bit With Constant Velocity Joint
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Solution Overview
Problem
Conventional rotary cutting tools, such as arthroscopic or open surgical burrs, have fixed positions that limit their reach and stability, leading to difficulties in accessing hard-to-reach areas during surgeries, and they often degrade quickly, produce excess vibration, and noise, which impacts surgical effectiveness.
Innovation Solution
A rotary cutting tool with an articulable cutting bit and a constant velocity joint, allowing for adjustable articulation and consistent rotational speed, enhanced stability, and reduced vibration and noise, featuring a multi-faceted ball and rotary socket configuration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional rotary cutting tools with fixed positions are used, then the structure is simple and easy to manufacture, but the reach and ability to access hard-to-reach areas is limited
Solution Approach 1:
The cutting head is made articulable rather than fixed, allowing it to dynamically adjust its orientation angle relative to the drive shaft. This enables the cutting head to reach hard-to-access areas while maintaining a relatively simple overall structure through controlled articulation movement.
Solution Approach 2:
The tool is divided into distinct segments including the drive shaft, cutting head, and articulation mechanism. This segmentation allows each component to perform its specific function independently while contributing to the overall versatility of accessing difficult areas.
2Reliability
If conventional rotary cutting tools are used, then the device is simple, but stability is low and the tool degrades quickly
Solution Approach 1:
The articulation mechanism provides controlled movement while maintaining stability during cutting operations. The ability to adjust the cutting head angle allows for optimal positioning that enhances stability and reduces tool degradation.
Solution Approach 2:
The articulation angle can be adjusted to optimize performance parameters such as stability and cutting efficiency. By changing the operational parameters through articulation, the tool achieves improved reliability without requiring a completely complex redesign.
3Object-affected harmful factors
If conventional rotary cutting tools are used, then the structure is simple, but excess vibration and noise are produced
Solution Approach 1:
The articulation mechanism allows dynamic adjustment of the cutting head position, enabling optimization of cutting angles that reduce vibration and noise generation during surgical procedures.
4Productivity
If the rotational speed is increased to improve cutting effectiveness, then the cutting performance improves, but the tool produces more vibration and noise
Solution Approach 1:
The articulation mechanism enables dynamic positioning of the cutting head at optimal angles, allowing high rotational speeds to be maintained with reduced vibration and noise through improved cutting geometry and contact with the bone surface.
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
Enables effective and safe cutting or drilling at desired angles with consistent rotational speed, improved stability, and reduced wear, suitable for arthroscopic, endoscopic, and robotic surgeries.
Implementation Method 1
the multi-faceted ball of the rotary cutting bit and drive shaft forming a constant velocity joint
Data Source
AI summary
A rotary cutting tool including an elongated housing having a proximal end and a distal end, the elongated housing extends circumferentially around a first axis. A drive shaft disposed within the elongated housing and extending between the proximal end and the distal end and rotatable about the first axis. A cutting bit housing coupled to the distal end of the elongated housing and rotatable relative to the drive shaft about an articulation axis between a non-articulated position and one or more articulated positions. A rotary cutting bit coupled to the cutting bit housing and the drive shaft and rotatable about the articulation axis with the cutting bit housing, the rotary cutting bit and drive shaft forming a constant velocity joint.