Ball-and-Socket Joint Load Distribution via Segmented Retainer
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Solution Overview
Problem
Existing ball-and-socket joints for work vehicles, such as crawler dozers, face challenges in maintaining strength and adjustability due to wear and load distribution issues, particularly in accommodating changes in attitude and wear of the blade during operation.
Innovation Solution
A ball-and-socket joint design featuring a ball stud, socket, endless retainer ring, and split bearing ring, where the split bearing ring is captured by the retainer ring and base to prevent ball pullout and distribute loads, allowing for adjustment through shim removal and tightening to improve fit and accommodate wear.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a conventional ball-and-socket joint is used to interconnect the blade and blade lift mechanism, then the joint can support the blade during attitude changes, but the joint fails to distribute loads effectively among fasteners leading to reduced strength and premature wear
Solution Approach 1:
The retainer ring is divided into multiple segments that can be independently adjusted, allowing each segment to be positioned and secured with fasteners that distribute loads effectively across the joint structure, preventing premature failure at single stress points
Solution Approach 2:
The joint design incorporates adjustable parameters through the segmented retainer ring and fastener system, allowing the geometry and load distribution characteristics to be optimized for different operating conditions, thereby maintaining strength and reliability across varying blade attitudes and loads
2Manufacturing precision
If the ball-and-socket joint is designed with fixed dimensions, then the initial fit is precise, but the joint cannot accommodate wear of the ball and socket over time
Solution Approach 1:
The retainer ring segments are designed to be adjustable rather than fixed, enabling the joint geometry to be modified over time. As wear occurs on the ball and socket, the segments can be repositioned and resecured to restore the precise fit, thereby extending the joint's service life while maintaining manufacturing precision
Solution Approach 2:
The adjustable segmented design anticipates future wear by providing a mechanism to restore the original precise fit before wear becomes critical. The segments can be pre-positioned and adjusted to compensate for wear patterns, maintaining optimal performance throughout the joint's operational life
3Strength
If the retainer ring is attached with multiple fasteners, then the load distribution is improved, but the assembly and disassembly process becomes more complex
Solution Approach 1:
By segmenting the retainer ring into multiple independent sections, each section can be attached with its own fasteners, distributing loads effectively while allowing individual sections to be assembled or disassembled independently, reducing the overall complexity of the fastening process
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
The joint provides enhanced strength and adjustability by distributing loads effectively among fasteners and accommodating wear, ensuring reliable operation and extended useful life by maintaining a precise fit and preventing premature wear on critical components.
Implementation Method 1
the endless retainer ring acts both to retain the split bearing ring in place and to distribute among all the fasteners a load transmitted thereto. Such load distribution promotes the overall strength of the joint
Implementation Method 2
the split retainer ring blocks the ball from pulling out of the socket
Implementation Method 3
the fasteners may be tightened. Such tightening advances the endless retainer ring toward the base causing the endless retainer ring to cam opposite ends of the split retainer ring relative to one another
Implementation Method 4
decreasing the inner diameter of the split bearing ring so as to improve the fit of the split bearing ring about the ball
Data Source
AI summary
A ball-and-socket joint (12) comprises a ball stud (32) comprising a ball (38) at an end thereof, and a socket (34) in which the ball (38) is positioned for relative movement between the ball (38) and the socket (34). An associated method is disclosed.