Snap-Fit Brake Liner Assembly for Serviceable Medical Support Arms
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Solution Overview
Problem
Current medical device suspension systems face challenges in assembly and field service due to the need for manual gluing and assembly of mechanical radial braking devices, which are not easily field replaceable/serviceable, requiring disassembly and transport of the brake assembly, which are not easily field serviceable, and transport of the brake assembly, which are not easily field replaceable.
Innovation Solution
A brake assembly with snap-fitted liners and backing portions that simplify assembly and field service, utilizing a dovetail receptacle and structure for easy installation and adjustment of frictional braking force.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If manual gluing is used to attach brake liners to the clamp assembly, then the brake assembly provides stable braking performance, but the assembly process becomes complex and time-consuming
Solution Approach 1:
The patent replaces the manual gluing process with a mechanical snap-fit retention system. The brake liners include engagement protrusions that fit into corresponding recesses in the clamp assembly, eliminating the need for adhesive bonding while maintaining secure attachment and stable braking performance.
Solution Approach 2:
The brake liner is divided into multiple segments or pieces that can be independently assembled into the clamp assembly. This segmentation allows for easier installation and replacement of individual liners without requiring complete disassembly of the brake assembly, simplifying the manufacturing and maintenance processes.
2Strength
If the brake assembly is designed as a integrated unit, then the structural strength is improved, but the field serviceability deteriorates
Solution Approach 1:
The brake assembly is designed with separable components including removable brake liners that can be detached from the clamp assembly. This allows field service personnel to replace worn liners without removing the entire brake assembly from the medical device support system, maintaining structural integrity while enabling easy maintenance.
Solution Approach 2:
The brake liners are designed as extractable components that can be removed from the clamp assembly in the field. The snap-fit retention system allows liners to be easily taken out and replaced without specialized tools or complete disassembly, significantly improving field serviceability while maintaining overall structural strength.
3Ease of repair
If the brake liners are made as separate replaceable parts, then the field replaceability is improved, but the assembly complexity increases
Solution Approach 1:
The complex multi-step attachment process is replaced with a simple snap-fit mechanical retention system. The brake liners include protrusions that automatically engage with recesses in the clamp assembly during installation, providing secure attachment without requiring multiple fastening operations or specialized tools, thus maintaining low assembly complexity while enabling easy field replacement.
4Reliability
If the brake assembly requires disassembly for service, then the component protection is improved, but the service time increases
Solution Approach 1:
The brake liner is segmented as a separate removable component that can be quickly detached and replaced without disassembling the entire brake assembly or removing it from the medical device support system. This allows rapid field service while the remaining brake assembly structure remains protected and intact.
Solution Approach 2:
The brake liner is designed for easy extraction from the clamp assembly through the snap-fit retention system. Field service personnel can remove and replace liners in minutes without requiring disassembly of the brake assembly housing or removal from the medical device support system, dramatically reducing service time while maintaining component protection.
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 snap-fitted brake assembly simplifies factory assembly and field service, allowing for efficient and cost-effective maintenance without disassembly, enhancing the usability and reliability of medical device support systems.
Implementation Method 1
a frictional brake is provided near the pivot location of the extension arm that is operable to maintain the extension arm in the desired angular position
Implementation Method 2
an actuator configured to flex the first and second backing portions to urge the first and second liners toward and away from each other
Implementation Method 3
This process creates a normal force between the brake clamp and the shaft, and provides necessary frictional force to control the pivotable movement of the arm around the shaft
Data Source
AI summary
A medical device support system including a central shaft, an extension arm, and a brake assembly. The extension arm has a hub mounted to the central shaft for pivotable movement. The brake assembly is secured in the hub for rotation therewith and includes first and second backing portions and first and second liners supported by the backing portions. The first liner includes axially spaced flanges that define therebetween a dovetail receptacle and the first braking portion includes a dovetail structure. The first liner is supported by the first backing portion by the dovetail receptacle of the first liner being snap-fitted to the dovetail structure of the first backing portion. The brake assembly includes an actuator configured to flex the first and second backing portions to urge the first and second liners toward and away from each other to respectively increase and decrease a frictional braking force to the central shaft.