Adjustable Anvil and Floating Impact Assembly for Orthopedic Impactors
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Solution Overview
Problem
Existing orthopedic impactor tools face issues with repositioning of end effectors, manual decoupling and recoupling, recoil forces, and difficulty in maintaining precision due to recoil and motor damage, which disrupt workflow and reduce tool longevity.
Innovation Solution
The orthopedic impactor tool incorporates an adjustable anvil assembly with a rotatable and non-rotatable anvil portion and a floating impact assembly with a decoupling interface, allowing for precise orientation adjustment and isolation of recoil forces from the motor, using a linear motion converter to minimize recoil and improve control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If manual decoupling and recoupling of end effectors is used, then repositioning flexibility is achieved, but workflow disruption and time loss occur
Solution Approach 1:
The anvil assembly incorporates a rotatable portion that can dynamically change orientation during operation. The positioning device allows the rotatable anvil portion to be rotated to different orientations and locked in place, enabling quick repositioning without manual decoupling and recoupling of the entire end effector assembly.
Solution Approach 2:
The anvil assembly is divided into a fixed anvil portion and a rotatable anvil portion. This segmentation allows the rotatable portion to be independently adjusted and repositioned while the fixed portion remains stationary, enabling flexible repositioning without disrupting the entire tool assembly.
2Force
If traditional impactor design is used, then impact force is delivered, but recoil forces damage motor and reduce tool longevity
Solution Approach 1:
The impact assembly is designed as a separate, floating component that can move independently relative to the motor housing. The decoupling interface extracts the recoil force path from the motor, allowing the impact assembly to absorb and dissipate recoil forces without transmitting them to the motor, thereby protecting the motor from damage.
Solution Approach 2:
The impact assembly incorporates floating elements and decoupling interfaces that allow dynamic movement during impact. The linear motion converter can move relative to the motor housing, and the impact assembly can float independently, enabling the system to dynamically absorb and manage recoil forces without rigid transmission to the motor.
3Measurement precision
If linear motion converter operates at high speed, then impact precision is improved, but recoil forces increase and affect control
Solution Approach 1:
The floating impact assembly acts as an intermediary between the linear motion converter and the anvil. It includes a decoupling interface that allows the impact assembly to move independently, absorbing shock and reducing the transmission of high-speed recoil forces back to the motor and operator, thereby maintaining control while preserving impact precision.
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 enhances precision and reduces operator fatigue by enabling quick and precise repositioning of end effectors and minimizes recoil forces, extending tool lifespan and reducing mechanical stress on the motor.
Implementation Method 1
the linear motion converter, while being driven by the rotational motion, converts the rotational motion into linear motion and communicates the linear motion to the thrown mass
Implementation Method 2
the linear motion, communicated to the thrown mass, causes the thrown mass to accelerate and impact the non-rotatable anvil portion
Data Source
AI summary
In some implementations, an adjustable anvil assembly and/or a floating impact assembly may be used in an orthopedic impactor tool to provide linear impacts. The adjustable anvil assembly may include a rotatable anvil portion and a non-rotatable anvil portion. The rotatable anvil portion may be rotatable relative to the non-rotatable anvil portion. The floating impact assembly may include a linear motion converter that interfaces with a thrown mass of the orthopedic impactor tool via a floating coupling interface.