Surgical Adapter Assembly Multi-Drive Load Distribution
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Solution Overview
Problem
Powered surgical devices require adapter assemblies for connecting end effectors to actuation units, but existing solutions do not effectively distribute loads and provide flexibility, leading to the need for robust support structures and rigid intermediate portions.
Innovation Solution
The adapter assembly includes multiple drive assemblies with rotatable drive shafts and high ratio transmission systems, such as planetary and harmonic gear systems, that distribute loads equally between shafts, allowing for flexible intermediate portions and reducing the need for robust support, enabling efficient longitudinal movement of trocar and pusher assemblies.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If existing adapter assemblies are used to connect end effectors to actuation units, then the connection function is provided, but the loads are not effectively distributed and rigid support structures are required
Solution Approach 1:
The drive transmission is divided into multiple independent drive shafts (first drive shaft, second drive shaft, third drive shaft) that can be distributed through separate pathways. This segmentation allows loads to be distributed across multiple channels rather than concentrated in a single rigid structure, reducing the need for robust intermediate support.
Solution Approach 2:
The patent transitions from a single-axis drive transmission to a multi-dimensional arrangement with drive shafts extending in different directions (first direction, second direction, third direction). This spatial distribution across multiple dimensions enables flexible routing through the adapter assembly body without requiring rigid structural support.
2Adaptability or versatility
If multiple drive assemblies are used to distribute loads, then load distribution and flexibility are improved, but the device complexity increases
Solution Approach 1:
The adapter assembly integrates multiple drive assemblies (first, second, and third drive assemblies with respective drive shafts) into a single multi-functional unit that can simultaneously transmit multiple independent drive signals to the end effector. This universal design allows the adapter to handle various surgical functions (clamping, stapling, cutting) through one integrated component rather than requiring separate adapters for each function.
Data Source
AI summary
An adapter assembly for connecting an end effector to a surgical instrument includes first, second, and third drive assemblies configured for converting rotational motion into linear motion. Each of the second and third drive assemblies includes a pair of rotatable drive shafts for longitudinally advancing and retracting respective second and third drive members.