Toggle Fastener Beam Self-Alignment for Uneven Rear Surfaces
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Solution Overview
Problem
Existing toggle bolts face difficulties when screwing into components with uneven rear sides, leading to inclined threaded holes and potential twisting of the beam during screwing, especially with machine threads.
Innovation Solution
A toggle bolt design featuring a beam with a pivot connection to a band, allowing for controlled tilting and alignment with an inclined contact plane, supported by nose-shaped projections to secure the beam against twisting, ensuring proper thread alignment and stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the beam is designed to rest flat against the back of the component, then the threaded hole should align well with the drilled hole, but unevenness on the rear side causes the threaded hole to become inclined and the beam to twist during screwing
Solution Approach 1:
The connection between the beam and band is designed as a pivot bearing, allowing the band to pivot relative to the beam. This dynamic connection enables the beam to self-adjust its orientation during insertion, compensating for unevenness on the rear side of the component and ensuring proper alignment of the threaded hole without causing beam twisting
Solution Approach 2:
The pivot bearing changes the degree of freedom of the beam-band connection, allowing rotational movement that adapts to variations in the rear surface geometry. This parameter change enables the system to maintain alignment precision despite unevenness in the component back
2Ease of operation
If the beam is tilted in the cavity to rest on the back of the component, then alignment is improved, but the beam may twist during screwing due to uneven rear side
Solution Approach 1:
The pivot bearing provides a controlled degree of freedom that allows the beam to tilt and self-align during insertion while maintaining stability during the screwing operation. The dynamic adjustment occurs during insertion, and the beam stabilizes in the correct position during screwing, preventing twisting
Solution Approach 2:
The pivot bearing acts as an intermediary mechanism between the band and beam, mediating the transition from the tilted insertion position to the stable operational position. It allows controlled movement during insertion while preventing unwanted twisting during screwing
Data Source
Figure 1
Figure 2
Figure 3~4
AI summary
The invention relates to a toggle anchor (1) and a fastening method using this toggle anchor (1). Toggle anchors (1) with a beam (5) and a band (17) for holding are known, wherein the beam (5) has a transverse opening (9) with an internal thread (10) for receiving a screw (24). To improve such toggle anchors (1) with regard to use with metric screws (24), the invention proposes that the beam (5) have an inclined bearing surface (EA) on its bearing side (11), whereby, when the screw (24) is screwed in, the beam (5) automatically assumes a position from a controlled inclined position with slight pressure in which the screw (24) is aligned with the internal thread (10) so that it can be easily screwed in.