Serviceable Joint With Removable Race and Retaining Ring
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Solution Overview
Problem
Conventional ball joints are difficult to service and repair due to their pressed-together assembly, which prevents access to interior components once they become worn, limiting the ability to replace only the worn parts without disassembling the joint destructively.
Innovation Solution
A joint design featuring a removable race and pin from a separate housing, with a retaining ring and tapered components that allow for easy disassembly and replacement of the joint's components without damaging the housing, enabling the pin and race to be swapped out independently.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a pressed-together assembly is used to manufacture ball joints, then the joint achieves a robust and durable assembly, but the interior components become inaccessible for service and repair when worn
Solution Approach 1:
The ball joint is divided into separable components: a housing, a pin, and a race. The race is further segmented from the housing through the use of a retaining ring that allows it to be removed independently. This segmentation enables selective replacement of worn components without destroying the entire assembly, resolving the contradiction between durability and repairability.
Solution Approach 2:
The retaining ring is extracted as a separate element that secures the race to the housing. By removing this retaining ring, the race can be taken out from the housing independently, allowing access to interior components for service and repair while maintaining the robust pressed-together assembly structure.
2Ease of repair
If a threaded cap replaces the press-fit closure, then the ball joint pin can be removed, but only the pin can be replaced while the race remains integrally formed in the housing
Solution Approach 1:
The retention mechanism is segmented into a retaining ring that secures the race and a threaded cap that secures the retaining ring. This allows the race to be separated from the housing independently, enabling both the pin and race to be replaced separately, thus achieving full component independence.
Solution Approach 2:
The retaining ring is extracted as a separate component that can be removed to free the race from the housing. This extraction enables the race to be replaced independently of the housing, while the threaded cap provides the removal mechanism, achieving complete component independence for both pin and race replacement.
Data Source
AI summary
A serviceable joint features a pin, a housing with a hollow interior, and a removable race. The race has hollow interior chambers, an upper one of which is larger than the lower. The bottom end of the pin is passable through the hollow interior chambers and onward through an open lower end of the housing to situate the top end of the joint pin within the upper chamber of the race, from which a remainder of the pin hangs in free floating state. A retaining ring is engaged in an annular groove in the peripheral wall of the housing to clamp the race in place in a seated position abutting a tapered exterior area of the race against a tapered interior portion of the housing, whereby the race is centered and stabilized in the housing to restrain the head of the free-floating pin.