Ball Joint Locking Boot With Integrated Retention Ring
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Solution Overview
Problem
Existing ball joint systems face issues with secure sealing of flexible protective boots and axial retention of ball joint housings, leading to contamination, wear, and potential catastrophic failure due to loose connections and rattling noise, which complicates manufacturing, installation, and maintenance.
Innovation Solution
A single metal base ring with inwardly flexible detents is used to both secure the flexible protective boot to the ball joint housing and provide secondary retention in case of press fit failure, simplifying the connection and reducing the need for multiple hardware pieces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple separate hardware pieces (retention ring clip and boot securing mechanism) are used to secure the boot and retain the housing, then the sealing and retention functions are performed, but the device complexity increases and the risk of contamination from loose components increases
Solution Approach 1:
The patent combines the retention ring clip and boot securing mechanism into a single integrated locking boot component. The locking boot includes an integrated base that simultaneously performs both functions: securing the flexible boot to the housing and retaining the housing in the automotive component. This eliminates the need for separate hardware pieces and reduces the risk of contamination from loose components.
Solution Approach 2:
The locking boot is designed as a multi-functional component that performs multiple tasks: it seals the ball joint housing, secures the flexible boot to the housing, and provides secondary retention of the housing in the automotive component. This universal component replaces multiple specialized hardware pieces, simplifying the overall assembly while maintaining reliable sealing and retention functions.
2Ease of operation
If conventional press-in boot mounting methods (using recessed grooves, spiral ring clips, or resilient metal ring clips) are used, then the boot can be easily installed, but the boot can be easily removed and the seal can be damaged or loosened during heavy use
Solution Approach 1:
The locking boot features a curved, resilient base that flexes during installation to expand over the housing, then contracts to lock securely in place. This elastic deformation allows for easy installation while creating a strong, durable lock that resists damage or loosening during heavy use. The curved geometry enables the boot to conform to the housing while maintaining sealing pressure.
3Ease of operation
If the retention ring clip is spaced an axial distance from the automotive component surface to allow tool access, then tool access is facilitated, but significant rattling noise and impact damage occur when dislodgement occurs
Solution Approach 1:
The locking boot merges the retention function with the boot securing function into a single integrated component. The resilient base of the locking boot maintains continuous contact with both the housing and the automotive component, eliminating gaps that would cause rattling noise and impact damage. The integrated design ensures that the retention force is applied directly through the boot base, preventing loose connections while maintaining tool access during installation.
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 solution enhances the durability and sealing of the boot, reduces contamination risks, and simplifies installation and maintenance by using a single piece of hardware for dual functions, ensuring a tighter and more reliable connection between the ball joint housing and automotive components.
Implementation Method 1
a resilient metal base ring with inwardly flexible detents
Implementation Method 2
The resilient metal base ring with inwardly flexible detents is pressed into a matching peripheral groove in the exterior of the ball joint housing
Implementation Method 3
provides secondary retention in case of press fit failure
Implementation Method 4
The protective rubber boot holds the lubricant within the boot interior and the boot seals prevent contaminants from contacting the moving parts and lubricant within
Data Source
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AI summary
An automotive component having an opening through which a ball joint extends, the ball joint comprising: a housing (3) having an exterior substantially cylindrical surface, a seating surface radially extending from the exterior surface for abutting an adjacent first side of the automotive component, and a peripheral groove (26) disposed in the exterior surface spaced axially from the seating surface a predetermined distance; a ball stud having a ball end mounted within the housing and a shank extending axially out of a crown of the housing; a flexible boot (30) having an distal end sealingly engaged on the shank and an opposing proximal base end, the base end including a metal base ring (28) with an inwardly extending flexible detents (34) engaged in the peripheral groove in the housing and a base seal sealing engaged on the exterior surface, the base ring having a radially extending abutment surface (43) for retaining an adjacent second side of the automotive component, and wherein the automotive component is selected from the group consisting of: a control arm; a stabilizer link; a stabilizer bar; and a steering linkage.