Locking Push-Pull Fastener Sleeve for Re-Adjustable Precision Mounting
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Solution Overview
Problem
Existing precision adjustment fastener mechanisms face challenges in securely locking the position of platforms relative to bases, as thread locking compounds can be difficult to remove and radial expansion techniques may decrease the moment carrying capacity of locking push-pull fastener assemblies.
Innovation Solution
A locking push-pull fastener assembly with a sleeve featuring an axial displacement portion, which includes cuts or reliefs that facilitate axial movement and torque transmission between its portions, allowing for secure locking when subjected to compressive force, thereby eliminating the need for thread locking compounds and maintaining moment carrying capacity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If thread locking compounds are applied to the threads between the threaded sleeve and threaded hole, then the locking reliability is improved, but the ease of future adjustment deteriorates due to difficult removal and residue accumulation
Solution Approach 1:
The patent extracts the locking function from chemical compounds and implements it through a mechanical structure - specifically, the threaded sleeve incorporates locking features (such as deformable portions or engagement elements) that mechanically lock into corresponding features in the threaded hole, eliminating the need for thread locking compounds and enabling easy removal and re-adjustment while maintaining reliable locking
2Reliability
If the threaded sleeve is caused to expand radially within the threaded hole, then the locking reliability is improved, but the moment carrying capacity deteriorates due to structural weakening
Solution Approach 1:
The patent segments the threaded sleeve into distinct functional portions - a main body portion that maintains structural integrity and moment carrying capacity, and separate locking features (such as radially extendable portions or engagement elements) that provide locking reliability when engaged with corresponding features in the threaded hole, thereby avoiding the need to compromise the entire sleeve structure for locking purposes
Data Source
AI summary
A precision adjustment fastener mechanism comprises a base, a platform, and a locking push-pull fastener assembly. The base has a first aperture and the platform has a second aperture. The fastener assembly is disposed within the second aperture. The fastener assembly comprises a clamping fastener having a portion positioned in the first aperture, a sleeve having a third aperture extending along an axis of the sleeve. The clamping fastener is positioned within the third aperture. The sleeve comprises a first portion moveable relative to a second portion along the axis. The first portion and the second portion each comprise outer threads. An axial displacement portion separates the first and second portions and transmits a torque between the first and second portions. The axial displacement portion facilitates movement of the first and second portions to bind threads of the first and second portions with the threads of the platform.