Fluid Conduit Push-Spindle Bearing Anti-Corrosion Screw Lock
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Solution Overview
Problem
Conventional threads for fluid line slide spindle bearings suffer from corrosion damage during thread cutting, which compromises anti-corrosion protection and smooth operation, especially under high torque conditions.
Innovation Solution
Designing nut and bolt threads as round threads with a larger diameter difference and applying a continuous anti-corrosion layer to ensure a gap, allowing for effective corrosion protection and smooth operation even under high torque conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If conventional threads are used for the sealing bush, then the assembly can be manufactured with standard threading processes, but the anti-corrosion layer is damaged during thread cutting, compromising corrosion protection
Solution Approach 1:
The anti-corrosion layer is applied to the nut thread before the bolt thread is screwed in, ensuring that the corrosion protection is established in advance before any potential damage could occur during assembly or disassembly operations
Solution Approach 2:
The anti-corrosion layer is applied selectively to specific surfaces (the nut thread of the upper part neck) while leaving other areas (the bolt thread) untreated, allowing different surfaces to have different functional properties - the nut thread receives corrosion protection while the bolt thread maintains its original characteristics for smooth engagement
2Reliability
If a continuous anti-corrosion layer is applied to the nut thread, then permanent corrosion protection is achieved, but the smooth running of the thread may be compromised
Solution Approach 1:
The anti-corrosion layer is applied only to the nut thread surface while the bolt thread remains untreated, creating local differentiation where the protected surface provides corrosion resistance and the untreated mating surface ensures smooth engagement without coating interference
Solution Approach 2:
The anti-corrosion layer is applied to the nut thread in advance before assembly, allowing the coating to cure and establish permanent protection before the bolt thread is ever inserted, ensuring both corrosion protection and smooth operation are achieved
3Strength
If high torque is applied during screwing in the sealing bush, then secure fastening is achieved, but corrosion damage can block the thread
Solution Approach 1:
The anti-corrosion layer is applied to the nut thread before any high-torque assembly operations, ensuring that the corrosion protection is established in advance and will withstand the mechanical stresses of tightening and loosening without degrading
Solution Approach 2:
The invention changes the physical state or properties of the nut thread surface by applying a corrosion-protective coating, modifying its chemical composition or surface characteristics to resist corrosion even under high-torque conditions that would otherwise cause corrosion damage
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution provides permanent corrosion protection and ensures quick assembly/disassembly of the sealing bush, maintaining smooth operation even under high torque conditions, with the anti-corrosion layer remaining intact during assembly and disassembly processes.
Implementation Method 1
the inserted O-ring is sealingly and elastically deformed radially to the axis of rotation between the oppositely arranged in this end position cylindrical partial surfaces of the upper neck of the slide and the sealing bush
Data Source
Figure 1
Figure 2
AI summary
The bearing has a sealing sleeve screwed into a neck of an upper part of a slide. A nut thread of the neck and a bolt thread of the sleeve are formed as circular threads and define threaded profiles (8', 13'). The threaded profile of the nut thread has a middle diameter that is larger than a middle diameter of the threaded profile of the bolt thread, where the middle diameter of the threaded profile of the nut thread amounts to 5 to 6 mm. A continuous corrosion protection layer (14) is applied on the nut thread such that the layer forms a gap (15) of 0.1mm opposite to the bolt thread.