Ball Joint Socket Spring Washer for Antirotation Wear Control
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Solution Overview
Problem
Existing ball joint socket assemblies face challenges in preventing relative rotation between internal components during steering operations, leading to excessive wear and potential premature loosening.
Innovation Solution
The implementation of a spring washer with protrusions or recesses that engage with corresponding features in the housing cavity, effectively preventing the spring washer and axially slidable bearing from rotating with the ball stud, thereby reducing wear on tolerance absorbing spacers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the internal bearing is split to create interference between bearing OD and housing cavity ID, then resistance to rotation is increased, but the bearing may fracture or assembly motion becomes tight and inconsistent
Solution Approach 1:
A non-rotating spacer is introduced as an intermediary component between the bearing and housing cavity. This spacer prevents rotation of the bearing without requiring interference fits that cause friction. The spacer acts as a mediator that provides rotational constraint while maintaining smooth axial movement of the bearing.
Solution Approach 2:
The rotational constraint function is separated from the bearing component itself and assigned to a dedicated spacer component. This segmentation allows the bearing to focus on its primary function of enabling smooth axial motion, while the spacer handles the rotational prevention function independently.
2Reliability
If the cover plate or housing cavity is hardened to resist wear, then wear resistance is improved, but manufacturing cost and complexity increase
Solution Approach 1:
A sacrificial spacer component is used that can be easily manufactured and replaced if worn. Instead of hardening expensive housing components, the design accepts that the spacer may wear and can be economically replaced, while the main housing and cover plate remain soft and easier to manufacture.
Solution Approach 2:
The spacer serves as a protective intermediary that absorbs wear between moving components. By placing this wear-prone component in the rotation path, the housing cavity and cover plate are protected from wear without requiring hardening treatments.
3Adaptability or versatility
If the tolerance absorbing spacer is made soft to remain fully plastic, then tolerance absorption function is improved, but the spacer becomes prone to excessive wear during rotation
Solution Approach 1:
The functions of tolerance absorption and rotational constraint are separated into different components. The soft spacer maintains its tolerance absorption capability while a separate harder component (the non-rotating spacer or housing features) handles the rotational constraint, preventing the soft spacer from wearing excessively.
Solution Approach 2:
A harder non-rotating spacer or housing feature acts as a mediator that prevents rotation of the soft tolerance-absorbing spacer. This protective intermediary shields the soft spacer from rotational wear while allowing it to perform its tolerance absorption function.
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 effectively prevents excessive wear on internal components by maintaining the spring washer's position relative to the axially slidable bearing, even during steering operations, thus enhancing the durability and reliability of the ball joint socket assembly.
Implementation Method 1
a spring washer positioned on the slidable bearing for imparting a biasing force between the cover plate and the slidable bearing and the ball portion of the ball stud
Data Source
AI summary
In a socket assembly having a housing with a closed end and an open end and an axially slidable and rotatable bearing, a spring washer seated on the axially slidable and rotatable bearing with a protrusion or a recess on the external periphery for engagement with a cooperating recess or protrusion on an inner cavity of the housing to effectively stop movement of spring washer with the axially slidable and rotatable bearing during driving conditions.