Floating Nut Standoff Attachment for Cross-Thread Prevention
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Solution Overview
Problem
Existing standoff attachments with rigidly locked threaded nuts face issues with cross-threading during assembly and disassembly, particularly when using power tools, making it difficult to separate and reassemble components during maintenance, especially on thin-walled or composite substrates.
Innovation Solution
A standoff attachment with an internal floating nut mounted at the distal end of an elongated post, allowing for minor axial and rotational movement, which prevents cross-threading and facilitates easy assembly and disassembly by accommodating the nut's displacement relative to the post, ensuring secure engagement without jamming or stripping.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the threaded nut is rigidly locked or anchored in position on the standoff post, then the nut is securely fixed to the post, but the risk of cross-threaded engagement increases and disassembly becomes difficult
Solution Approach 1:
The patent transitions from a static, rigidly locked nut to a dynamic floating nut that can move axially and rotate relative to the standoff post. This movement capability allows the nut to self-align during assembly and disassembly, eliminating cross-threading risks while maintaining secure fixation through the floating mounting mechanism within the hollow channel.
Solution Approach 2:
The hollow channel of the standoff post acts as an intermediary structure that allows the nut to float and move freely. The channel provides a controlled environment for the nut's movement while preventing complete separation, serving as a mediator between the need for secure fixation and the need for operational ease.
2Reliability
If the threaded nut is tightly locked within the standoff post, then the nut remains securely attached, but cross-threading occurs and reassembly becomes impossible without replacing the nut
Solution Approach 1:
The floating nut design allows dynamic adjustment during maintenance operations. The nut can move axially to disengage from cross-threaded positions and rotate to realign with the correct threading, enabling repeated disassembly and reassembly without replacing the nut, thus improving ease of repair while maintaining attachment reliability.
Solution Approach 2:
The floating mounting mechanism provides preliminary anti-action against cross-threading by allowing the nut to move and self-align before engagement. This prevents the harmful effect of cross-threading from occurring in the first place, while also preventing the nut from becoming permanently locked, thereby facilitating maintenance operations.
3Ease of operation
If the nut is mounted in a floating manner allowing axial and rotational movement, then cross-threading is prevented and assembly is easier, but the nut may separate from the post
Solution Approach 1:
The design segments the connection between the nut and post into two functional zones: a floating zone within the hollow channel that allows movement for easy assembly, and a retention zone at the open end where the fastener secures the nut to the post, preventing separation while maintaining assembly ease.
Solution Approach 2:
The floating nut provides dynamic movement capability during assembly operations, allowing axial and rotational adjustment to prevent cross-threading. The in-turned flange with fastener opening provides a static retention point that prevents nut separation, combining dynamic ease of operation with static connection stability.
Data Source
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AI summary
A standoff attachment for bonded fixation to a substrate includes a standoff post with internal nut for engaging a mating fastener used to mount a support element such as a line clamp substantially at a distal end thereof. The standoff post extends from an enlarged bond-on base and defines a hollow slotted channel of noncircular cross-section which terminates at the distal end in an in-turned flange defining an open fastener-receiving port. The nut includes a keyed rib sized and shaped for axial slide-fit reception into the slotted channel at an inboard side of the distal end flange, wherein this rib mates with the slotted channel shape to preclude substantial nut rotation. An elongated slotted plug is secured within the slotted channel to retain the nut, preferably with a minor degree of axial freedom, axially between the plug and the distal end flange.