Damped Tool Attachment Assembly for Surgical Vibration Control
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Solution Overview
Problem
Existing surgical instruments used for resecting bone tissue often experience significant vibrations during operation, which can lead to reduced precision and increased user fatigue due to the transmission of motor-induced vibrations through the handle.
Innovation Solution
An attachment assembly is designed to couple with a motorized tool, featuring a damping member and adjustable geometry to minimize vibrations, including a collet with gears and a damping member that absorbs kinetic energy, reducing chatter and vibration at the tool tip.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a motorized resection tool is used to remove bone tissue, then the productivity of tissue removal is improved, but vibrations are generated that reduce manufacturing precision and increase user fatigue
Solution Approach 1:
A damping member is introduced as an intermediary element between the motor and the tool bit. This damping member absorbs and dissipates vibrations generated by the motor, preventing them from being transmitted to the tool bit and affecting resection precision. The damping member acts as a mediator that allows the motor to drive the tool while isolating the harmful vibrational effects.
2Productivity
If a motorized resection tool is used to remove bone tissue, then the productivity of tissue removal is improved, but user fatigue increases due to vibration transmission through the handle
Solution Approach 1:
The damping member serves as a mediator that interrupts the vibration transmission path from the motor through the attachment assembly to the handle. By placing this vibration-absorbing element in the transmission path, the motor can continue to provide high-speed rotation for efficient tissue removal while the damping member prevents excessive vibrations from reaching the user's hand, thereby reducing fatigue.
3Object-affected harmful factors
If the attachment assembly is made more rigid to reduce vibration, then vibration transmission is reduced, but the complexity of the device increases
Solution Approach 1:
Instead of simply increasing the rigidity of the entire attachment assembly, the invention changes the vibrational parameters by introducing a damping member with specific damping characteristics. This member is designed with optimal damping coefficients and material properties to absorb vibrations at critical frequencies. The parameter optimization approach allows vibration reduction without requiring a fully rigid (and therefore complex) assembly structure.
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 effectively reduces vibrations and chatter, enhancing the precision of surgical procedures and reducing user fatigue by minimizing the transmission of motor-induced vibrations, allowing for smoother and more controlled operation of the tool.
Implementation Method 1
The attachment may include stiffness modification and/or damping features such as damping members, thicknesses, and the like to minimize and/or reduce vibration at a tool tip
Implementation Method 2
The collet may include various gears and connection portions that transfer torque from the motor to the tool
Data Source
AI summary
Disclosed is an assembly for holding a tool. The assembly may selectively reduce and/or eliminate vibrations received and felt by a user. Reducing vibrations may reduce or eliminate chatter at a working end of a tool.