Barbed Insert Retention for Rotary Bell Cup Splash Plate
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Solution Overview
Problem
Conventional rotary bell cup and splash plate assembly designs face issues with retaining rings deforming and potentially being damaged or sheered off, leading to a non-robust assembly that cannot withstand operational forces.
Innovation Solution
A novel splash plate and bell cup assembly design featuring a barbed insert that securely engages with the bell cup's inner surface, using pins to position the splash plate and an elastic skirt with barbs to ensure retention without the need for retaining rings, allowing for easy assembly and servicing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional retaining ring arrangement is used to secure the splash plate assembly in the bell cup, then the assembly can be retained in place, but the retaining ring may deform, be damaged or sheered off during pressing, resulting in insufficient robustness to withstand operational forces
Solution Approach 1:
The patent removes the conventional retaining ring from the assembly and replaces it with an integral barbed insert that is directly formed as part of the insert structure. This extraction of the separate retaining ring component eliminates the problems of deformation and damage associated with pressed-fit retaining rings, while maintaining the retention function through the barbed engagement features that are inherently part of the insert design.
Solution Approach 2:
The patent combines the retention function previously performed by a separate retaining ring into the insert itself through integral barbed features. The barbed insert integrates the retention mechanism directly into the insert structure, creating a unified component that is pressed as a single piece into the bell cup, thereby eliminating the weakness of separate retaining rings and improving overall assembly robustness.
2Ease of manufacture
If pins are pressed into openings in the splash plate and insert, then the splash plate can be secured to the insert, but the openings deform the radially inner surface of the groove, requiring remachining and potentially damaging the retaining ring
Solution Approach 1:
The patent eliminates the groove structure that requires remachining by using an integral barbed insert design. The barbed features are directly formed on the insert without requiring a separate groove in the bell cup base, thereby removing the source of deformation problems and the need for post-assembly remachining operations.
Solution Approach 2:
The barbed insert is designed with pre-formed barbs that provide retention functionality before assembly. The barbed features are integral to the insert and are formed during manufacturing, eliminating the need for post-assembly remachining of grooves and preventing deformation issues that occur when pins are pressed into openings during assembly.
Data Source
AI summary
A splash plate assembly is retained in a rotary bell cup by a barbed skirt that interfaces with an inner surface of the bell cup. The splash plate assembly includes a splash plate or deflector that is secured to the front side of an insert. The insert has barbed extensions that may form a skirt around an outer periphery thereof. The insert is snapped into the front bell opening of a bell cup, and the barbed extensions elastically deform and snap back outwardly to interface with a shoulder formed in the bell cup inner surface.