Embedded Snap Ring Grease Boot for Ball Joint Sealing
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Solution Overview
Problem
Existing grease boot configurations for ball joints require multiple components for closure and may not optimize sealing, making installation complex and less effective.
Innovation Solution
A grease boot design featuring an elastomeric body with a partially embedded C-shaped snap ring that compresses to fit into a radially extending groove, reducing the number of components and enhancing sealing by utilizing a polyurethane-based elastomeric body and metal-based snap ring for improved retention and sealing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional locking ring assemblies are used for grease boot closure, then the boot can be secured to the housing, but multiple separate components are required which increases assembly complexity and part count
Solution Approach 1:
The snap ring is integrated directly into the elastomeric boot body as a single molded component, eliminating the need for separate locking rings and multiple assembly steps. The C-shaped snap ring with legs is formed as part of the boot during molding, creating a unified structure that combines the boot and retention mechanism into one piece.
2Reliability
If traditional locking ring configurations are used, then the boot can be assembled, but the sealing effectiveness is not optimized
Solution Approach 1:
The snap ring features localized engagement legs that protrude into the housing bore to provide secure retention, while the main body of the boot maintains sealing contact with the housing. The differential design allows different regions of the same component to serve different functions: sealing at the interface and mechanical retention via the snap ring legs.
3Reliability
If the snap ring is fully embedded in the elastomeric body, then sealing is improved, but installation becomes more difficult
Solution Approach 1:
The snap ring is partially embedded in the elastomeric boot body rather than being fully enclosed. This partial embedding provides sufficient sealing effectiveness while leaving the C-shaped profile and engagement legs exposed enough to facilitate installation and expansion into the housing bore.
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
This design simplifies installation, reduces part count, and enhances sealing efficiency by allowing the compressible radial gap to close by 90% or more, providing a tighter seal and improved retention of the boot within the ball joint housing.
Implementation Method 1
The C-shaped body defines a compressible radial gap in the elastomeric body, wherein the compressible radial gap is configured to close by 90% or more in size upon installation of the grease boot into a housing of a ball joint
Implementation Method 2
a grease boot comprising an elastomeric body, and a snap ring that is at least partially embedded in the elastomeric body
Data Source
AI summary
A ball joint includes a grease boot having a snap ring at least partially embedded in an elastomeric body. The snap ring has a C-shaped body that defines a compressible radial gap in the elastomeric body. The snap ring can be at least partially embedded in a flange of the grease boot, with a radially outermost edge of the flange including a first elastomeric shoulder, a second elastomeric shoulder, and an exposed outer wall of the snap ring located between the first elastomeric shoulder and the second elastomeric shoulder.