Solidifiable Lubricant for Electrical Joint Particle Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Press-fitting technology in electrical devices often results in the formation of loose particles, which can lead to short circuits due to mechanical and thermal stress, and existing solutions like lubrication are inadequate in preventing the formation of electrically conductive particles.
Innovation Solution
A nonmetallic, thermosetting or elastomeric plastic lubricant is used that solidifies through inner cross-linking, effectively bonding chips in place and preventing them from becoming loose, thereby sealing the joint and preventing short circuits.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If press-fitting technology is used to mechanically stabilize carrier material, then mechanical stabilization is achieved, but particles form on the surfaces of pins or sleeves
Solution Approach 1:
The patent converts the harmful particles formed during press-fitting into beneficial fixed elements by using a solidifiable lubricant to encapsulate and bond the particles within the joint. The particles that would otherwise cause short circuits are transformed into fixed, non-harmful elements embedded in the lubricant matrix.
Solution Approach 2:
The solidifiable lubricant acts as an intermediary substance between the pin and sleeve surfaces. It not only reduces friction during assembly but also bonds to and encapsulates particles, preventing them from becoming loose while maintaining the mechanical stabilization function.
2Object-generated harmful factors
If auxiliary lubricants are used to reduce friction during press-fitting, then particle formation is reduced, but electrically conductive particles may still form and cause short circuits
Solution Approach 1:
The patent changes the physical state of the lubricant from liquid to solid through curing. This parameter change allows the lubricant to transition from merely reducing friction to actively bonding and fixing particles, providing both friction reduction and short circuit prevention.
Solution Approach 2:
The solidifiable lubricant creates a composite structure where particles are embedded within the lubricant matrix. This composite material combines the lubricating properties with the structural integrity needed to prevent particle movement and electrical conductivity.
3Reliability
If a nonmetallic solidifiable lubricant is used to bond chips in place, then short circuits are prevented, but the lubricant must withstand high temperature stress without losing shape
Solution Approach 1:
The patent utilizes the curing process to change the lubricant from a soft, workable state to a hard, temperature-resistant state. The cured lubricant maintains its shape and bonding properties under high temperature stress while preventing particle movement.
Solution Approach 2:
The lubricant is designed as a single-use material that performs its bonding function during assembly and then permanently maintains that bond under various stress conditions including temperature variations, without requiring maintenance or replacement.
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 reliably fixes chips in the joint, preventing them from causing short circuits and providing a durable, temperature-resistant seal that resists corrosive attacks, while being easy to handle and apply, with a longer shelf life compared to mono-component substances.
Implementation Method 1
a thermosetting or elastomeric plastic, which is cured by inner cross-linking (chemically close-meshed or wide-meshed cross-linked plastic)
Data Source
AI summary
An electrical device, particularly a control unit, having at least one joint having a first joining partner, especially a sleeve, and a second joining partner, especially a pin, the joint between the two joining partners having a junction; at least at the junction an at least partially solidified lubricant being present. Furthermore, in a method for lubricating a joint of an electrical device, the joint having a first joining partner, particularly a sleeve, and a second joining partner, particularly a pin; in a step one of the joining partners being wetted with a lubricant, in a following step the joining partner wetted with the lubricant being joined to the other joining partner and the lubricant subsequently solidifying.