Ribbed Stud Clamping Assembly to Prevent Axial Slippage
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Solution Overview
Problem
Current axial loaded studs rely on friction between the stud and knuckle, which can lead to play and noise if not well clamped, necessitating larger screws for secure attachment, increasing costs and weight.
Innovation Solution
A stud member with radial ribs on its outer wall and a clamping member made of a softer material, such as aluminum, enhances mechanical grip through clamping forces, reducing reliance on friction and allowing smaller fastening parts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If larger screws are used to secure safe attachment and prevent slippage, then reliability is improved, but weight and cost increase
Solution Approach 1:
The stud shaft features localized radial ribs at specific positions rather than a uniformly enlarged structure. These ribs concentrate the gripping function at specific locations along the shaft, providing enhanced friction and mechanical interlocking with the clamping member while maintaining a lightweight overall structure. This local quality approach replaces the need for larger screws by creating targeted high-friction zones.
Solution Approach 2:
The radial ribs on the stud shaft are pre-formed structural features that create gripping surfaces before the clamping operation. When the clamping member is tightened, these pre-existing ribs immediately engage with the inside wall, creating friction and mechanical interlocking from the outset. This preliminary structural preparation eliminates the need for oversized fastening components.
2Reliability
If larger screws are used to prevent slippage under pulling forces, then reliability is improved, but cost increases
Solution Approach 1:
Instead of using expensive large-diameter screws throughout, the invention applies local quality by forming radial ribs only where needed on the stud shaft. This localized feature addition provides the necessary resistance to pulling forces through increased friction and mechanical engagement, while keeping the overall component size and material usage minimal, thereby reducing manufacturing costs.
Solution Approach 2:
The invention changes the friction parameter by introducing radial ribs that increase the contact surface area and friction coefficient between the stud and clamping member. This parameter change enables the use of smaller, cheaper fastening components while maintaining or improving resistance to pulling forces, as the enhanced friction compensates for the reduced size of the fastening members.
3Reliability
If friction between stud and clamping member is increased to prevent play and noise, then reliability is improved, but this normally requires larger fastening components
Solution Approach 1:
The radial ribs create localized high-friction zones on the stud shaft where the clamping member contacts the shaft. This local quality approach concentrates the friction-generating function at specific positions rather than requiring a uniformly large fastening structure. The ribs provide mechanical interlocking and increased friction exactly where the clamping force is applied, achieving connection stability without increasing overall device complexity.
Solution Approach 2:
The invention adds a radial dimension to the stud shaft surface through the protruding ribs, transforming a simple cylindrical surface into a multi-dimensional gripping structure. This dimensional change creates additional contact surfaces and friction paths in the radial direction, enhancing the connection stability and preventing play and noise without requiring larger fastening components in the axial direction.
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 design minimizes slippage, reduces assembly weight and cost, while maintaining clamping force, by utilizing radial ribs and material differences to enhance gripping and reduce friction dependence.
Implementation Method 1
the one or more ribs extending radially on the outer of the shaft creates friction or clamping forces between the shaft and the clamping member
Implementation Method 2
the one or more ribs may deform an inside wall of the clamping member to increase grip
Data Source
Figure 1A
Figure 1B
Figure 1C~1D-III
AI summary
An assembly for supporting pulling forces of a suspension member of a vehicle comprises a stud member comprising a shaft portion having one or more ribs extending in a radial direction on an outer wall of the shaft portion, a clamping member comprising a main body with a bore defined by an inside wall and arranged to receive the shaft portion, and a fastening member arranged to fasten the clamping member around the shaft portion when the shaft portion is inside the bore, wherein the main body of the clamping member is made of a first material, and the shaft portion of the stud member is made of a second material, and wherein the first material is softer than the second material.