Insulation Holder Rotary Joint Reduces Dowel Wear
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Solution Overview
Problem
Existing insulating material holders with threads require the dowel to rotate during installation, causing unnecessary wear and limiting design flexibility, as they are either separate components or integrated with the thread, leading to inefficiencies in load distribution and installation.
Innovation Solution
The insulating material holder features a rotary joint connecting the thread to the dowel, allowing the thread to rotate independently, with a shortening area that enables axial movement without dowel rotation, and includes non-rotatable screws for simultaneous anchoring, thread segments for reduced torque, and ribs for secure attachment, enhancing load-bearing capacity and installation efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the insulating material thread is integrated with the dowel as a one-piece structure, then the installation process is simplified, but the dowel rotates during screwing into the mounting base causing unnecessary wear and limiting design flexibility
Solution Approach 1:
The insulating material holder is divided into two separate functional parts: the insulating material thread (4) and the dowel (2), connected through a hollow shaft (3). This segmentation allows the thread to rotate independently during installation while the dowel remains stationary in the mounting base, eliminating unnecessary wear on the dowel-mating base interface.
2Strength
If the insulating material thread has a large outer diameter, then sufficient load-bearing strength is achieved, but the device complexity and installation space requirements increase
Solution Approach 1:
The hollow shaft (3) is designed as a thin-walled, flexible structure that connects the insulating material thread (4) to the dowel (2). This thin-walled design reduces the overall device complexity and installation space requirements while maintaining sufficient structural integrity to transmit loads between the thread and dowel.
3Reliability
If the insulating material thread is screwed deeply into the insulation panel, then secure attachment is achieved, but the dowel must also rotate which causes wear in the mounting base
Solution Approach 1:
The rotary joint between the insulating material thread (4) and the dowel (2) through the hollow shaft (3) enables dynamic movement during installation. The thread can rotate and screw deeply into the insulation panel for secure attachment, while the dowel remains stationary relative to the mounting base, preventing wear at the dowel-mating base interface.
Data Source
Figure 1~2
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AI summary
The fastener (1), to secure a foam insulation board to a building wall, has a thread (4) screwed into the board and rotating against the dowel (2) to be anchored in the wall. The fastener has a contraction section (7), between the thread and the dowel, to reduce the gap between them.