Profile Rail Fastening Assembly With Integrated Spring-Guided Clamping
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Solution Overview
Problem
Existing fastening devices for attaching add-on parts to profile rails are complex and difficult to assemble due to their numerous components, which increases production costs and assembly complexity.
Innovation Solution
A fastening device with a C-shaped cross-section and a longitudinal slot, featuring a cover plate, threaded plate, holding device, and spring, where guide projections on the cover plate engage with corresponding recesses in the holding device for torsionally rigid and axially displaceable mounting, reducing the number of components and simplifying assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a fastening device with multiple individual parts is used to ensure reliable fixation, then the fixation reliability is improved, but the device complexity and assembly difficulty increase
Solution Approach 1:
The patent combines multiple individual parts into an integrated fastening device with a unified body structure. The holding device integrates the receptacle, retaining flange, and guide recesses into a single component that works cooperatively with the cover plate and threaded plate, reducing the number of separate parts while maintaining fixation reliability through the coordinated function of integrated elements.
Solution Approach 2:
The fastening device is designed as a multi-functional unit where the holding device serves multiple purposes: it holds the threaded plate, provides retaining flange for support, incorporates guide recesses for alignment, and works with the spring mechanism. This multi-functionality reduces the need for separate components while ensuring reliable fixation.
2Strength
If a fastening device with numerous components is used to achieve secure attachment, then the fixation strength is improved, but the ease of manufacture and assembly deteriorates
Solution Approach 1:
By merging multiple components into integrated structures, the patent reduces the total number of parts that need to be manufactured and assembled. The holding device and cover plate are designed as cohesive units with built-in features (guide recesses, retaining flange) that eliminate the need for separate alignment and retention components, simplifying manufacturing while maintaining fixation strength.
Solution Approach 2:
The fastening device is segmented into functional modules (cover plate, holding device, threaded plate, spring) that can be manufactured separately and assembled through simple engagement features. The guide projections and guide recesses enable easy modular assembly without complex fastening operations, improving ease of manufacture while ensuring strong fixation.
3Ease of operation
If guide projections with sufficient length are used to provide required axial spring travel, then the ease of operation is improved, but the risk of collision with other elements increases
Solution Approach 1:
The guide projections act as intermediaries that define the axial travel path of the spring and cover plate. By positioning these projections strategically within the holding device structure, the patent enables sufficient spring compression travel while the projections themselves serve as physical stops that prevent excessive movement and collision with other elements like the attachment or guide rail.
Solution Approach 2:
The guide projections are pre-positioned on the cover plate at specific locations that predetermined the maximum axial travel distance. This preliminary positioning ensures that during operation, the spring can compress to the required extent for proper fastening, while the projections themselves prevent further travel that would cause collision with other 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
The simplified design reduces production costs and significantly eases assembly by minimizing components while maintaining effective clamping force, independent of the material used for the holding device, ensuring reliable fixation without material-dependent weight or stability issues.
Implementation Method 1
The fastening device also has a spring which pushes the cover plate and the holding device, with the threaded plate held in the receptacle, apart.
Implementation Method 2
the spring pushes the cover plate and the holding device, with the threaded plate held in the receptacle, apart
Implementation Method 3
a threaded rod which engages with an external thread in the threaded bore and is supported against the cover plate
Data Source
Figure 1
Figure 2~3
Figure 4
AI summary
The invention relates to a fastening device (10) for fastening an attachment part (14) to a profiled rail (16) having a substantially C-shaped cross section and a longitudinal slot (18), wherein the fastening device (10) comprises a cover plate (30), a threaded plate (32) having a threaded bore (45), a holding device (34) having a receptacle (46) for the threaded plate (32) and a radially protruding holding flange (52) for supporting on the attachment part (14). The holding device (34) is coupled with the cover plate (30) and the threaded plate (32) in a rotationally rigid manner, has a spring (36) arranged between the cover plate (30) and the holding device (34), and a threaded rod (38), which engages with an external thread (42) in the threaded bore (45), and which is supported by the cover plate (30). On the cover plate (30), at least one guide projection (62) projecting in the direction of the threaded plate (32) is provided, which guide projection engages in a corresponding guide recess (58) in the holding device (34) in a rotationally rigid and axially displaceable manner, and the spring (36) is supported directly on the cover plate (30). A fastening assembly (12) has such a fastening device (10) and an attachment part (14), which has an opening (28), through which the holding device (34) extends, wherein the holding flange (52) of the holding device (34) rests on the assembly part (34).