Blind Rivet Fastener Structure for One-Step Secure Mounting
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Solution Overview
Problem
Existing blind rivet connections require multiple working steps for mounting, which is inefficient.
Innovation Solution
A fastening element with a screw, sleeve-shaped rivet arrangement, and internal thread, featuring an installation spacer region, deformation region, and drive region, where the installation spacer region undergoes axial shortening upon screw tightening, enabling a one-step secure fastening process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a blind rivet connection is mounted using conventional methods, then a secure connection is achieved, but multiple working steps are required which reduces productivity
Solution Approach 1:
The patent combines multiple functional regions (installation spacer region, deformation region, drive region) into a single integrated rivet arrangement that performs multiple operations in one mounting step. The installation spacer region provides initial positioning, the deformation region creates the securing bulge, and the drive region enables screw engagement - all within a single component that is installed in one operation.
Solution Approach 2:
The installation spacer region is pre-configured to provide rotational and force locking capabilities before the actual fastening operation. This preliminary structural arrangement ensures that when the screw is tightened, the deformation region can immediately engage with the panel-shaped element to create the securing bulge without requiring separate positioning or alignment steps.
2Reliability
If the installation spacer region undergoes axial shortening through elastic or plastic deformation, then rotational and force locking are enhanced, but additional deformation complexity is introduced
Solution Approach 1:
The installation spacer region is designed with specific local structural characteristics that enable controlled elastic or plastic deformation. The circumferential boundaries are configured to radially extend over the deformation region, creating localized stress concentration points that guide the deformation process and ensure consistent rotational and force locking behavior without requiring complex overall structural changes.
3Reliability
If the circumferential boundaries of the installation spacer region radially extend over the deformation region, then rotational locking is improved, but manufacturing precision requirements increase
Solution Approach 1:
The installation spacer region is designed with asymmetric radial extension where the circumferential boundaries extend beyond the deformation region in specific directions. This asymmetric configuration provides inherent rotational locking capability through geometric interlocking, reducing sensitivity to manufacturing tolerances compared to a symmetric design that would require precise alignment in all directions.
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 simplifies the fastening process by reducing the number of steps required for mounting, ensuring a secure connection between panel-shaped elements with enhanced rotational and force locking capabilities.
Implementation Method 1
first of all plastic deformation of the deformation region occurs in such a manner that the axial length thereof is shortened and the circumferential boundaries thereof are radially enlarged
Implementation Method 2
the axial shortening of the length is caused by an elastic or plastic deformation
Implementation Method 3
the axial shortening of the length is caused by an elastic or plastic deformation
Implementation Method 4
the axial shortening of the length is caused by an elastic or plastic deformation or by a relative movement of components under friction
Data Source
AI summary
A fastening element (10) comprising a screw (1) with a screw head (11) and a sleeve-shaped rivet arrangement (2) through which the screw (1) passes. Starting from the screw head, the rivet arrangement (2) has an installation spacer region (21), a deformation region (22) and a drive region (23) into which the screw is screwed. Seen from the drive region (23) to the screw head, the circumferential boundaries of the drive region (23) lie within the boundaries of the deformation region (22), the boundaries of the installation spacer region (21) protrude radially over the boundaries of the deformation region (22), and the boundaries of the screw head protrude radially over the boundaries of the installation spacer region (21). The installation spacer region (21) and the deformation region (22) are designed in such a manner that, as the screw is tightened, first of all plastic deformation of the deformation region (22) occurs.