Plain Bearing Shell Insertion Aid to Prevent Seat Edge Abrasion
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Solution Overview
Problem
During the mounting of plain bearing shells, material abrasion occurs due to contact with the edges of the bearing seats, leading to potential failure and damage, especially in engine components like connecting rods.
Innovation Solution
An insertion aid apparatus with a supporting region that projects beyond the outer edge of the bearing seat, allowing the plain bearing shell to slide along without contacting the edge, manufactured from materials like plastic or elastomer to reduce friction and prevent abrasion, and featuring attachment regions that can be easily integrated with existing components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the plain bearing shell is inserted directly into the bearing seat, then the mounting operation is simple, but material abrasion occurs on the bearing back due to contact with the bearing seat edge
Solution Approach 1:
The patent introduces an insertion aid as an intermediary tool between the plain bearing shell and the bearing seat. This insertion aid includes a supporting region that contacts the plain bearing shell and guides it into the bearing seat, preventing direct contact between the bearing shell edge and the bearing seat edge. The intermediary tool thus eliminates material abrasion while maintaining a simple mounting operation.
2Reliability
If the plain bearing shell is deformed elastically during insertion to fit the bearing seat, then the bearing shell can be mounted, but material can be scraped off and jam between the bearing shell and bearing seat
Solution Approach 1:
The insertion aid acts as a mediator that controls the deformation process. The supporting region of the insertion aid guides the plain bearing shell into the bearing seat in a controlled manner, ensuring proper deformation fit while preventing uncontrolled scraping contact with the bearing seat edge. This eliminates material jamming while achieving reliable mounting.
3Object-affected harmful factors
If a supporting region is added to prevent contact with the bearing seat edge, then material abrasion is prevented, but the device complexity increases
Solution Approach 1:
The insertion aid is segmented into distinct functional regions: a supporting region that contacts and guides the plain bearing shell, and an attachment region that secures the insertion aid to the bearing seat. This segmentation allows each region to perform its specific function efficiently while keeping the overall device structure simple and manageable.
Solution Approach 2:
The insertion aid serves as a simple intermediary device with minimal structure - essentially a tool with a supporting region and an attachment region. This simplicity contrasts with the complex potential alternative of modifying the bearing shell or bearing seat themselves. The intermediary approach adds minimal complexity while effectively preventing material abrasion.
4Object-affected harmful factors
If the supporting region projects beyond the outer edge of the bearing seat, then the plain bearing shell can slide without contacting the edge, but the attachment region must be precisely positioned
Solution Approach 1:
The attachment region is designed to attach to existing features on the bearing seat (such as screw holes or mounting surfaces), allowing the insertion aid to self-position correctly. The supporting region then automatically projects beyond the bearing seat edge at the correct position, eliminating the need for high-precision custom positioning features.
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
Prevents material abrasion and reduces mounting force, ensuring smooth insertion and minimizing the risk of damage to components, even in cases of cracked or fracture-split connecting rods.
Implementation Method 1
the plain bearing shell can slide along on the supporting region, with the result that the plain bearing shell does not come into contact with an edge of the bearing seat
Implementation Method 2
the first attachment region and/or the first supporting region are manufactured from a plastic material and/or an elastomer material... the plain bearing shell can slide along on the first supporting region with a low resistance
Data Source
AI summary
An apparatus mounts a plain bearing shell of a plain bearing in a bearing seat of a component. The apparatus has an attachment region for releasably attaching the apparatus to the component. The apparatus has a supporting region for supporting the plain bearing shell during an insertion of the plain bearing shell into the bearing seat of the component. During the insertion into the bearing seat, the plain bearing shell can slide along on the supporting region, with the result that the plain bearing shell does not come into contact with an outer edge of the bearing seat.