Quick-Release Tool Coupler With Self-Locking Rotary Drive
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Solution Overview
Problem
Existing surgical device systems, including robotic systems, require a quarter-turn system for tool attachment, which is inefficient and lacks a quick-release mechanism for rotary motion transfer.
Innovation Solution
A self-locking quick-release mechanism using a spring-loaded coupling component that allows for compliant passage of actuation forces without alignment steps, featuring a coupler with a rotatable drive component and actuable locking ring for easy tool attachment and detachment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a quarter-turn system with concentric splines is used for tool attachment, then the tool can be securely locked to the device, but the attachment process becomes time-consuming and complex requiring precise alignment and rotation
Solution Approach 1:
The coupling mechanism is divided into separate functional components: a coupler body with cavity, a rotatable drive component with pin-receiving openings, and an actuable locking ring. This segmentation allows each component to perform its specific function independently, enabling quick attachment without complex alignment procedures while maintaining secure locking through the locking ring's engagement with the drive component.
Solution Approach 2:
The locking ring is pre-configured to engage with the drive component in a single motion. When the tool is inserted into the coupler body, the locking ring automatically or with minimal actuation engages the drive component, performing the locking action in advance before the tool is fully operational, thereby eliminating the need for time-consuming quarter-turn alignment procedures.
2Reliability
If concentric splines are used for rotary motion transfer, then reliable motion transfer is achieved, but the mechanism requires complex alignment and cannot be quickly released
Solution Approach 1:
The drive component is designed to be rotatable within the cavity, allowing dynamic adjustment and engagement. The pin-receiving openings in the rotatable drive component can align with corresponding pins on the tool through rotation, enabling reliable motion transfer while the actuable locking ring provides quick release capability by disengaging from the drive component without requiring complex alignment procedures.
Solution Approach 2:
The actuable locking ring serves as an intermediary mechanism between the tool and the coupler body. It mediates the connection by engaging with the rotatable drive component to transfer rotary motion reliably, while also providing a simple release mechanism that allows quick detachment without requiring the complex alignment needed for direct spline engagement.
3Manufacturing precision
If a quarter-turn alignment system is used, then precise alignment is achieved, but the overall device complexity increases
Solution Approach 1:
The coupling mechanism is segmented into distinct functional elements: the coupler body providing structural support and cavity, the rotatable drive component handling alignment and motion transfer, and the actuable locking ring managing engagement and release. This segmentation simplifies each individual component's design and manufacturing while maintaining precise alignment through the rotatable drive component's pin-receiving openings.
Solution Approach 2:
The rotatable drive component serves multiple functions: it provides the alignment interface through pin-receiving openings, enables rotary motion transfer through its rotatable nature, and works with the locking ring to provide both secure locking and quick release capabilities. This multi-functionality reduces the need for separate components, thereby reducing overall device complexity while maintaining manufacturing 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
Facilitates rapid and secure coupling and uncoupling of medical tools to surgical devices, enhancing efficiency and reducing complexity in medical procedures.
Implementation Method 1
A self-locking quick-release mechanism using a spring-loaded coupling component
Implementation Method 2
The rotatable driven component comprises at least two pin chambers defined in the rotatable driven component, and at least two tensioned pins
Data Source
AI summary
The various embodiments herein relate to a coupling apparatus for a medical device having a coupler body, a cavity defined in the coupler body, a rotatable drive component disposed within the cavity and having at least two pin-receiving openings, and an actuable locking ring disposed around the cavity.