Two-Part Bearing Block Adhesive Bonding on Fiber-Reinforced Plastic Carrier
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Solution Overview
Problem
Existing bearing arrangements for motor vehicles using fiber-reinforced plastic supports face challenges in achieving reliable and cost-effective mounting with uniform adhesive distribution, as traditional gluing methods can lead to shearing stress and displacement of adhesive, compromising the strength of the connection.
Innovation Solution
A two-part bearing block design with divided adhesive surfaces is used, ensuring minimal shearing stress and uniform adhesive distribution, where each part has angled partial surfaces forming a U-shaped adhesive area, and a through-hole bearing mount is provided to distribute forces evenly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a U-shaped adhesive surface is designed in one piece, then the bearing block can be assembled with the carrier, but the adhesive is subjected to shearing load and displaced at the flanks, resulting in non-uniform adhesive distribution
Solution Approach 1:
The bearing block is divided into two separate parts (first part and second part), each with its own adhesive surface. This segmentation eliminates the shearing stress problem that occurs in U-shaped single-piece designs, as each part bonds independently to the carrier without adhesive displacement, ensuring uniform adhesive distribution.
2Ease of manufacture
If the adhesive surface is not formed around the entire circumference of the carrier, then the manufacturing is simpler, but the bond does not support a positive fit between the bearing block and the carrier
Solution Approach 1:
The bearing block parts are designed with bearing mounts (through holes) that enable preliminary positioning and alignment with the carrier before final adhesive bonding. This preliminary mechanical guidance ensures proper fit and alignment, compensating for the reduced adhesive surface area, while maintaining manufacturing simplicity.
3Reliability
If the two partial surfaces of a part are angled at least 90° to one another, then the adhesive is displaced as little as possible during assembly, but the manufacturing precision requirement increases
Solution Approach 1:
The adhesive surfaces are designed with specific geometric parameters (angles of at least 90° between partial surfaces) that optimize adhesive retention during assembly. This parameter optimization minimizes adhesive displacement while maintaining manufacturability, as the right-angle configuration is straightforward to achieve in manufacturing compared to more complex angular configurations.
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
This design ensures a reliable, low-maintenance, and cost-effective adhesive bonding with uniform adhesive distribution, preventing adhesive displacement and ensuring a defined adhesive thickness, thereby enhancing the structural integrity of the bearing arrangement on fiber-reinforced plastic supports.
Implementation Method 1
The bearing block is glued to the carrier with this adhesive surface
Data Source
AI summary
The invention relates to a bearing arrangement for a motor vehicle, comprising a carrier (4) made of fiber-reinforced plastic, and a bearing frame (9) with a bearing recess for accommodating a bearing and an adhesive surface (15,16) for adhering the bearing frame (9) to the carrier (4). Said bearing frame is composed of a first part (11) and a second part (12), and the adhesive surface (15,16) is divided onto both parts (11,12). According to the invention, due to the two-part formation of the bearing frame (9), the adhesive located in the adhesive gap is not top loaded when adhering together, thus preventing the adhesive from being displaced when joining together and also ensuring a defined adhesive thickness.