Fiber-Reinforced Ball Socket Bearing for Crack-Free Assembly
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Solution Overview
Problem
Existing ball socket assemblies face challenges with fiber-reinforced bearings, which are prone to cracking due to increased stiffness, and unreinforced bearings lack wear resistance, leading to reduced operational life and installer fatigue during assembly.
Innovation Solution
A ball socket assembly with a monolithic bearing made of fiber-reinforced material, featuring a lower portion with an unbiased first radius of curvature and an upper portion with an unbiased second radius of curvature greater than the first, allowing for flexible assembly and reduced stress during installation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If fiber-reinforced material is used for the bearing, then wear resistance and operating life are improved, but the bearing becomes too stiff and cracks during assembly
Solution Approach 1:
The patent changes the geometric parameters of the bearing by introducing a non-constant radius ball cavity. The radius of curvature varies along the cavity surface, with the minimum radius being less than the ball radius and the maximum radius being greater than the ball radius. This parameter variation allows the bearing to flex during assembly while maintaining fiber reinforcement for wear resistance.
Solution Approach 2:
The patent uses fiber-reinforced plastic material for the bearing, combining plastic matrix with reinforcing fibers. This composite material provides both the necessary flexibility for assembly and the wear resistance for long operating life, resolving the contradiction between stiffness and flexibility.
2Duration of action of stationary object
If fiber-reinforced material is used for the bearing, then operating life is improved, but installer effort and fatigue increase during assembly
Solution Approach 1:
By varying the radius of curvature in the ball cavity, the patent creates a geometry that facilitates easier assembly. The non-constant radius design allows the bearing to flex more readily during installation, reducing the force required by the installer while maintaining the fiber-reinforced material for long operating life.
3Ease of operation
If unreinforced flexible material is used for the bearing, then ease of assembly is improved, but wear resistance decreases
Solution Approach 1:
The patent employs fiber-reinforced plastic material that combines the flexibility needed for easy assembly with the wear resistance required for reliable operation. The composite structure allows the bearing to be both flexible during installation and durable during service.
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 solution provides a bearing with enhanced wear resistance and reduced installer effort and fatigue, while avoiding cracking issues, resulting in a longer operational life and improved assembly efficiency.
Implementation Method 1
the bearing is made of a fiber-reinforced material to increase the wear resistance and operating life of the ball joint
Implementation Method 2
the fibers also increase the stiffness of the bearing material, thereby making it difficult to flex the bearing material sufficiently to snap the ball portion of the ball stud into the constant radius ball cavity
Data Source
AI summary
A ball socket assembly, bearing therefor, and method of construction thereof are provided. The ball socket assembly includes a housing with an inner bore extending between a closed first end region and an open second end region. A fiber-reinforced bearing is disposed in the inner bore. The bearing has a lower portion presenting a lower bearing surface having a first radius of curvature and an upper portion presenting an upper bearing surface having a second radius of curvature that is greater than the first radius of curvature. The lower bearing surface and the upper bearing surface surround a ball cavity in which a spherical ball portion of a ball stud is disposed. The housing second end region is plastically deformed radially inwardly to impart a bias on the bearing upper portion that causes the second radius of curvature to be biased substantially equal to the first radius of curvature.