Espagnolette Bar Guide With Axial Slot
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Solution Overview
Problem
Existing rod guides for rod locks require lengthy screwing or multiple turns to assemble upright, and often struggle with secure attachment, especially when loaded, due to complex assembly processes.
Innovation Solution
A rod guide design featuring a laterally opened threaded bore with an axial slot allows for quick assembly and secure attachment by locking onto a threaded bolt, utilizing a constriction or spring struts for latching, and can be made of plastic or metal with self-locking mechanisms, including lugs and film hinges for enhanced stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the threaded bore is closed and requires axial screwing for assembly, then the attachment is secure, but the assembly process becomes lengthy and complex
Solution Approach 1:
The threaded bore is segmented into two parts: a closed threaded portion for secure attachment and an open axial slot portion for quick insertion. This allows the block to be pushed onto the bolt laterally through the slot and then secured by threading into the closed portion, combining speed and security in the assembly process
Solution Approach 2:
Instead of requiring the block to be screwed onto the bolt from the end (axial direction), the design allows lateral insertion through the axial slot and then secures it by threading. This inverted approach enables quick positioning followed by secure fastening, reducing assembly time while maintaining reliability
2Loss of substance
If the block is made of thin walls to save material, then material efficiency improves, but structural strength and stability may be compromised
Solution Approach 1:
The block is constructed with thin-walled plastic structure that provides sufficient strength for the application while minimizing material usage. The thin walls are designed to be resilient enough to allow lateral insertion through the axial slot while maintaining structural integrity during operation
Solution Approach 2:
The block combines plastic material with integrated metal threaded insert or metal reinforcement elements to achieve both material efficiency and structural strength. This composite approach allows thin-walled construction while ensuring adequate strength for securing the rod guide
3Productivity
If the lateral opening is provided for quick assembly, then assembly speed improves, but secure attachment under load becomes difficult
Solution Approach 1:
The threaded bore is divided into an open axial slot for lateral insertion and a closed threaded portion for secure fastening. This segmentation allows the block to be quickly inserted through the lateral opening and then firmly secured by threading into the closed portion, ensuring both speed and reliability
Solution Approach 2:
The block's own material properties (resilience of plastic) are utilized to enable self-latching during the assembly process. The resilient material allows the block to be pushed laterally and then locks itself into position through the threaded connection, providing secure attachment without additional components
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 significantly reduces assembly time, ensures secure attachment even under load, and allows for precise positioning and easy insertion, while maintaining material efficiency through thin-walled construction.
Implementation Method 1
The block can be made of a resilient material such as plastic and the wings with the projection can be molded in one piece with the block
Implementation Method 2
Spring struts can protrude inwards from this, which recede behind the lumen of the threaded bore when a bolt end is pushed in from the side and jump back when the end position of the insertion path of the bolt end in the threaded bore is reached
Data Source
Figure 1A~1D
Figure 2A~2D
Figure 3A~3D
AI summary
Disclosed is a fastening element (10) for a threaded bolt (14), particularly a stud bolt, comprising a plastic or metal block (10) that has a threaded bore (18) and can be screwed onto the bolt (14). Said fastening element (10) is characterized in that the threaded bore (18) is laterally open by means of an axial slot (20) such that the block (10) can also be laterally placed on the threaded bolt (14).