Profile Rail Fastening Assembly With Bore-Engaging Threaded Plate Retention
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing fastening devices for profile rails require additional post-processing of the threaded plate, which weakens the thread and increases production costs, and often fail to securely hold the threaded plate in place during assembly and disassembly.
Innovation Solution
A holding device with a free end that engages within the threaded bore of the threaded plate, preventing it from falling out and allowing for easy assembly and disassembly, while maintaining secure fixation without additional indentations in the thread, and a resilient mounting that ensures reliable centering and secure engagement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If tabs or ribs engage in recesses on the flanks of the groove to secure the threaded plate, then the threaded plate is held securely against falling out, but additional post-processing of the threaded plate is required which weakens the thread and reduces maximum load capacity
Solution Approach 1:
The invention extracts the securing function from the threaded plate itself and relocates it to the holding cage. Instead of modifying the threaded plate with recesses, the holding cage is equipped with holding elements that actively engage the threaded plate, thereby preserving the thread integrity while achieving secure holding.
Solution Approach 2:
Rather than having the threaded plate passively receive securing features (recesses), the invention inverts the approach by having the holding cage actively provide securing features (holding elements) that engage the threaded plate. This inversion eliminates the need for post-processing the threaded plate.
2Reliability
If slots are machined laterally into the threaded bore of the threaded plate to accommodate arms with latching elements, then the threaded plate is fixed on the quick fastener, but additional work steps are required and the threads are weakened
Solution Approach 1:
The invention removes the securing features from the threaded plate and places them in the holding cage. The holding elements are integrated into the holding cage structure, eliminating the need for additional machining operations on the threaded plate and preserving thread strength.
Solution Approach 2:
The holding elements are merged with the holding cage structure, forming an integrated component. This combination eliminates the need for separate securing features on the threaded plate and simplifies the overall assembly process.
3Reliability
If the threaded plate is held securely in the holding cage to prevent slipping or falling out, then reliable fixation is achieved, but the assembly and disassembly process becomes more difficult
Solution Approach 1:
The holding elements are designed with elastic mounting, allowing them to dynamically adapt during assembly and disassembly. During assembly, the elements flex to allow insertion, then spring back to secure the threaded plate. During disassembly, the threaded plate can be pushed out by applying force, after which the elements return to their original position.
Solution Approach 2:
The holding elements change their engagement parameter based on the assembly state. During normal operation, they maintain strong engagement to prevent falling out. During disassembly, when force is applied to push the threaded plate out, the elements yield and allow extraction, then automatically return to their securing position.
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
The solution allows for reliable and secure fastening of the threaded plate without post-processing the thread, enabling higher load-bearing capacity and simplified assembly/disassembly, while maintaining secure fixation and centering.
Implementation Method 1
a resilient mounting that ensures reliable centering and secure engagement
Data Source
Figure 1~2a
Figure 2b~3a
Figure 3b~4d
AI summary
The invention relates to a fastening device (20) for fastening a load to a profiled rail (18), which has a substantially C-shaped cross-section and a longitudinal slit (22), which fastening device comprises a cover plate (28), the length and/or width of which is greater than the width of the longitudinal slit (22) of the profiled rail (18), a threaded plate (32), which has a threaded bore (68) and is longer but narrower than the longitudinal slit (22) of the profiled rail (18), and a retaining cage (30) for the threaded plate (32) for inserting into the profiled rail (18), which retaining cage is arranged on the cover plate (28) and has a receptacle (44), which extends through the retaining cage (30) and in which the threaded plate (32) is retained at a distance from and parallel to the cover plate (28). In order to enable simple and reliable securing of the threaded plate (32) against falling out, a retaining apparatus (60) for the threaded plate (32) is provided on the retaining cage (30), which retaining apparatus engages by means of a free end (76) into the bore diameter of the threaded bore (68) of the threaded plate (32) and secures the threaded plate (32) in an insertion direction (S) in the receptacle (44) against falling out, the insertion direction (S) extending substantially in the longitudinal direction of the threaded plate (32). The invention further relates to a fastening assembly (10) having such a fastening device and having a profiled rail (18), which profiled rail has a substantially C-shaped cross-section and a longitudinal slit (22), the length of the threaded plate (32) being greater than the width of the longitudinal slit (22) and the width of the threaded plate (32) being less than the width of the longitudinal slit (22).