Sheet Metal Nut Pull-Out Force via Segmented Securing Part
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing sheet metal nuts lack sufficient pull-out forces, which can lead to easy removal from support parts, especially under deformation, due to inadequate contact areas and bending resistance.
Innovation Solution
A sheet metal nut design featuring a cage part with integrally molded supporting edge sections and a separate securing part with leg plates joined by a center tie, where the contacting final sections on the securing part provide large-surface contact with the hole's peripheral zones, enhancing pull-out forces and bending resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the sheet metal nut uses a conventional one-piece design with supporting edge sections, then the structure is simple, but the pull-out force is insufficient
Solution Approach 1:
The sheet metal nut is divided into two separate parts: a cage part and a securing part. The securing part includes leg plates that are joined together by a center tie, creating a more complex but stronger structure capable of withstanding high pull-out forces.
Solution Approach 2:
The cage part and securing part are combined through joining mechanisms (such as welding or mechanical connection) to form an integrated structure. The securing part with joined leg plates and center tie merges with the cage part to provide enhanced pull-out resistance while maintaining the overall nut structure.
2Strength
If the contacting final sections have small contact area, then the structure is compact, but the bending resistance is insufficient
Solution Approach 1:
The leg plates are joined together by a center tie that extends in the dimensional direction, creating a three-dimensional structure. This adds structural rigidity and bending resistance by distributing loads across multiple dimensions rather than relying solely on contact area.
3Strength
If the leg plates are not joined together, then the manufacturing is simpler, but the pull-out force is reduced
Solution Approach 1:
The securing part is designed as a separate component with leg plates that can be manufactured independently and then joined together. This segmentation allows for specialized manufacturing processes optimized for each part while achieving the required structural strength through the joining of leg plates with the center tie.
Data Source
AI summary
A sheet metal nut including a cage part (1) that is fitted with a bottom plate (2), supporting edge sections, and opposite side plates (4, 5). Contacting final sections (15, 16) are disposed across from the supporting edge sections and grip the peripheral zones of a hole along with the supporting edge sections in a mounted arrangement of the sheet metal nut. The supporting edge sections are molded onto the bottom plate (2) while a separate securing part (10) is joined to the side plates (4, 5) and is equipped with two leg plates (11, 12) that are located between the side plates (4, 5) and extend from a base region (13) towards the supporting edge sections (24, 25) at an increasing distance from each other. The contacting final sections (15, 16) are molded onto one respective free end of a leg plate (11, 12), are aligned with their front sides directed towards one another, and lie across from the supporting edge sections (24, 25).