Double Pipe Bend Snap-Fit Assembly
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Solution Overview
Problem
Existing double pipe bend systems require tools for assembly, increasing working time and dependency on skilled labor, and may not provide a simple visual check for proper assembly.
Innovation Solution
A snap-in connection system with radially extending fixing webs and insertion pockets allows for tool-free assembly, featuring U-shaped pockets and hook-shaped extensions for secure engagement, along with support projections and guide extensions for stability and alignment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If screws and tools are used to assemble the double pipe bend system, then a secure connection is achieved, but assembly time increases and skilled labor is required
Solution Approach 1:
The connection system is segmented into distinct components: fixing webs attached to the outer pipe bend and corresponding insertion pockets on the inner pipe bend. This segmentation allows for simplified assembly where components interlock without requiring complex tools or skilled labor, while maintaining secure connection through the distributed fixing web structure
Solution Approach 2:
The snap-in connection system is designed to be self-assembling without external tools. The fixing webs automatically engage with the insertion pockets through a snap-in mechanism that provides both guidance and securing force, eliminating the need for screwdrivers, wrenches, or other assembly tools while maintaining reliable connection
2Manufacturing precision
If screws are used to connect the pipe bends, then a form-fitting connection is achieved, but the assembly process becomes complex and requires skilled labor
Solution Approach 1:
Instead of using threaded fasteners that require threading and tightening operations, the invention inverts the approach by using a snap-in mechanism where the fixing webs are inserted into the insertion pockets and locked in place through elastic engagement. This inversion simplifies the assembly process from complex screw fastening to simple insertion and locking, while maintaining precise form-fitting connection
Solution Approach 2:
The mechanical screw and thread system is replaced with a snap-in elastic engagement system. The fixing webs utilize elastic deformation and geometric interlocking to achieve form-fitting connection, substituting the complex screw-thread-mechanism with a simpler elastic snap-in mechanism that requires no specialized skills or tools
3Ease of operation
If a simple snap-in connection is used, then assembly is simplified and tool-free, but connection strength may be reduced
Solution Approach 1:
Multiple fixing webs are merged into a single connection system, distributing the connection strength across multiple engagement points. Each fixing web provides individual snap-in engagement, and the combined effect of multiple webs creates a strong, reliable connection that maintains structural integrity while preserving assembly simplicity
Solution Approach 2:
The connection strength is enhanced by adding dimensional complexity to the fixing web structure. The fixing webs extend in multiple directions and engage with corresponding features in the insertion pockets, creating a multi-dimensional interlocking system that provides strong connection resistance in various load directions while maintaining simple snap-in assembly
Data Source
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AI summary
In a double pipe bend system (1; 101) with an outer pipe bend (2; 102) and an inner pipe bend (3; 103) surrounded by the outer pipe bend (2; 102), which are connected to each other via a positive locking connection (20), a solution is to be created by which an improved double pipe bend system is provided which can be easily and quickly assembled without tools.This is achieved by the positive locking connection (20) being a snap-fit connection (21) comprising at least two fixing ribs (22a, 22b, 23a, 23b; 122a, 122b) extending radially from the inside (24) of the outer tube bend (2; 102) and at least in the direction of the first longitudinal axis (12), and at least two insertion pockets (25a, 25b; 125a, 125b) extending radially from the outside (26) of the inner tube bend (3; 103) and at least in the direction of the first longitudinal axis (12), wherein each fixing rib (22a, 22b, 23a, 23b; 122a, 122b) is inserted into and connected to an associated insertion pocket (25a, 25b; 125a, 125b). is in a form-fitting engagement.