Valve Shaft Adapter Retention Clip for Loss-Proof Assembly
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Solution Overview
Problem
Existing valve shaft adapters are not loss-proof, leading to a risk of loss during assembly or repair of automated valves, which can render the valve assembly non-operational.
Innovation Solution
A retention clip system that secures a valve shaft adapter collar to a valve actuator, using a central bar with opposing arms and resilient spring clip junctions to prevent axial movement and ensure secure coupling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a valve shaft adapter is simply placed on the valve shaft without a retention mechanism, then the assembly process is simple and quick, but the adapter can be lost during assembly or repair operations
Solution Approach 1:
The retention clip employs elastic arms that can dynamically change their state between engaged and disengaged positions. The arms are designed to flex outward during installation and then snap into engagement with the valve shaft adapter, providing automatic retention without complex fastening mechanisms. This dynamic behavior resolves the contradiction by maintaining simplicity while ensuring reliable retention.
Solution Approach 2:
The retention clip is designed to automatically engage with the valve shaft adapter through its elastic arms that snap into place without requiring additional fastening operations. The spring-loaded mechanism self-activates upon installation, eliminating the need for separate securing steps and maintaining assembly simplicity while ensuring the adapter cannot be accidentally lost.
2Reliability
If a retention mechanism is added to prevent adapter loss, then the adapter retention is improved, but the device complexity increases
Solution Approach 1:
The retention clip is segmented into multiple independent elastic arms that can function independently. Each arm is a separate element that can be manufactured individually and then assembled into the final retention mechanism. This segmentation allows for a relatively simple overall structure while achieving reliable retention through multiple independent engagement points.
Solution Approach 2:
The retention clip utilizes flexible elastic arms that function as thin, compliant elements. These arms are designed with specific flexibility characteristics allowing them to deflect during installation and then maintain a engaged state through elastic recovery. This approach achieves reliable retention using simple, flexible components rather than complex rigid mechanisms.
3Reliability
If the retention clip uses elastic arms that extend through holes in the adapter, then the adapter is securely retained, but the manufacturing precision requirements increase
Solution Approach 1:
The retention mechanism utilizes elastic deformation as a key parameter change. The elastic arms are designed to flex within controlled limits during installation and operation, allowing for accommodation of minor variations in hole positioning. This parameter change approach enables the system to maintain reliable retention while tolerating moderate manufacturing tolerances in the adapter holes.
Solution Approach 2:
The elastic arms are pre-designed with built-in flexibility that acts as a cushion against manufacturing variations. The elastic compliance is incorporated beforehand into the retention clip design, allowing it to absorb and compensate for misalignments in the adapter holes during assembly, thereby reducing the stringency of manufacturing precision requirements.
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 retention clip system effectively prevents the loss of the valve shaft adapter by ensuring secure attachment to the valve actuator, maintaining the operational integrity of the valve assembly.
Implementation Method 1
a resilient spring clip junction configured to allow the ear to move inward
Implementation Method 2
Each opposing arm may be configured to compress towards the central bar via application of pressure to each lug
Data Source
AI summary
A retention clip secures a valve shaft adapter collar to a valve actuator. The retention clip includes a central bar having opposing arms extending therefrom. Each arm includes a resilient spring clip junction attached to the central bar, a lug coupled to the resilient spring clip for receiving pliers, and an end extending from the lug and configured for insertion through a hole in the valve shaft adapter collar into a pocket of the valve actuator for retaining the valve shaft adapter collar therein. The pliers can be used to compress and consequently retract the ends into the holes to disassociate the valve shaft adapter collar from the valve actuator and/or insert the valve shaft adapter collar into the valve actuator.