Fastener Holder Assembly Structure for Pre-Positioned Retention
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Solution Overview
Problem
Fasteners, such as screws and bolts, tend to fall out of holes in components during assembly processes, especially in complex manufacturing, leading to losses due to the assembly step not being immediate.
Innovation Solution
A fastener holder with a rotationally symmetrical reception breakthrough and transverse assembly structures that provide a holding force through interference fit or friction, allowing pre-placement of fasteners without the need for immediate screwing, ensuring they do not fall out.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If a fastener is inserted into a hole without immediate screwing, then the fastener can be positioned in advance, but the fastener falls out and is lost
Solution Approach 1:
The patent introduces an intermediary structure (the reception breakthrough with holding elements) between the fastener and the mounting hole. This intermediary mechanism provides temporary retention of the fastener through friction and normal forces, preventing it from falling out while allowing easy removal when needed. The holding elements act as mediators that create sufficient holding force without permanently fixing the fastener.
Solution Approach 2:
The patent enables preliminary positioning of the fastener in the reception breakthrough before the actual mounting operation. The fastener can be inserted and held temporarily in advance, allowing preparation and alignment before final installation. This preliminary action is made possible by the holding mechanism that secures the fastener without requiring immediate screwing.
2Ease of manufacture
If the reception breakthrough is formed rotationally symmetrical, then manufacturing is simplified and costs are reduced, but holding force may be compromised
Solution Approach 1:
The patent applies local quality by creating asymmetric holding elements (protrusions or recesses) within the otherwise rotationally symmetrical reception breakthrough. These localized asymmetric features provide directional holding force and prevent fastener rotation or removal, while the overall rotational symmetry of the reception breakthrough itself maintains manufacturing simplicity. The asymmetric holding elements are strategically positioned to provide sufficient holding force without complicating the overall structure.
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
Enables simple, cost-effective assembly by preventing fasteners from falling out and allowing for easy handling and manufacturing, while maintaining a high degree of holding force and adaptability.
Implementation Method 1
This holding force can be achieved, for example, by means of an interference fit or press fit between the fastener and the reception breakthrough
Implementation Method 2
The at least one assembly structure, preferably the plurality of assembly structures, serve to come into contact with the mounting hole (or a mounting hole) in a mounted state in such a way that they form or provide a holding force in interaction with the mounting hole, in particular due to the existing friction
Data Source
AI summary
Fastener holder (1) comprising a base body (10) and at least one assembly structure (50), wherein the base body (10) extends in a longitudinal direction (L), wherein the base body (10) has a reception breakthrough (12), wherein the reception breakthrough (12) extends completely through the base body (10), wherein the reception breakthrough (12) has an inner wall (14) formed rotationally symmetrically about the longitudinal direction (L), wherein the assembly structure (50) extends transversely to the longitudinal direction (L).