Electronic Control Unit Rivet Fixture for Vibration Resistance
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Solution Overview
Problem
Existing electronic control units face challenges in securely fastening their housing to a fixing bracket due to loose fastening caused by vibration and the inefficiency of traditional fastening methods like welding, which require additional processes and result in high maintenance and repair difficulties.
Innovation Solution
An electronic control unit with a rivet fixture mounting unit integrated into the housing, allowing for secure fastening using rivet fixtures with screw threads, which provides a robust connection to a fixing bracket, reducing the need for additional fastening processes and enhancing structural reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If bolts and nuts are used to fasten the housing to the fixing bracket, then the housing can be fastened, but the fastening force is insufficient due to small contact area and bolts loosen due to vibration
Solution Approach 1:
The fastening system is segmented into multiple contact points through the rivet fixture structure. The rivet fixture divides the fastening function into the rivet body for anchoring and the flange for distribution, allowing force to be distributed across multiple contact areas rather than concentrated at a single point, thereby increasing total fastening force and reliability
Solution Approach 2:
The rivet fixture extends the fastening interaction into additional spatial dimensions. The flange structure creates a broader contact area in the radial direction, while the rivet body extends into the thickness direction of the housing, transforming a point contact into a distributed volumetric interaction that significantly increases fastening force and resistance to vibration
2Strength
If welding is used to fasten the housing to the fixing bracket, then strong fastening is achieved, but additional processes are required and maintenance/repair becomes difficult
Solution Approach 1:
The welding process (thermal/chemical bonding) is replaced with a mechanical fastening system using the rivet fixture. The rivet fixture achieves strong fastening through mechanical interlocking and friction, eliminating the need for welding processes while maintaining equivalent or superior fastening strength and enabling easy disassembly for maintenance
Solution Approach 2:
The rivet fixture is designed as a simple, easily replaceable mechanical component compared to welded joints. If the rivet fixture becomes damaged or worn, it can be quickly removed and replaced without requiring complex welding equipment or skilled welding operations, significantly reducing maintenance complexity and cost
3Ease of operation
If separate fastening holes are provided for bolts and nuts, then the housing can be fastened, but the structure becomes complex and additional fastening components are required
Solution Approach 1:
The rivet fixture merges multiple fastening functions into a single integrated component. The rivet body and flange are combined into one piece that performs both anchoring and force distribution functions, eliminating the need for separate bolts, nuts, and washers, thereby simplifying the overall fastening system and reducing the number of parts
Solution Approach 2:
The rivet fixture is designed as a universal fastening component that can be used in various positions and configurations on the housing. The standardized rivet fixture design allows it to serve multiple fastening needs across different applications, reducing the variety of specialized fastening components required and simplifying inventory and assembly procedures
Data Source
AI summary
An electronic control unit according to the present invention includes an electronic control element which includes a printed circuit board that electrically controls respective components of a vehicle, and a heat radiating portion that is provided at one side of the printed circuit board, a housing which accommodates the electronic control element, a connector which connects the electronic control element and the vehicle, a sealing unit which seals a connecting portion between the electronic control element and the connector, and a fixing bracket, and further includes a rivet fastening means in order to fastened the housing and the fixing bracket.