Elastic Holding Disk for Fastening Stud Tolerance Compensation
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Solution Overview
Problem
Existing fastening devices for components on automobile bodies face difficulties due to mismatched production tolerances of fastening studs, making secure and simple mounting challenging.
Innovation Solution
The device incorporates a holding disk with elastic distance members and fastening projections that allow preliminary connection without contacting the component, enabling adjustment and secure fastening by deforming during stud insertion, thus compensating for tolerances and preventing loosening.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the holding disk and holding member are rigidly connected without adjustment capability, then the structure is simple and mounting is quick, but position tolerances of fastening studs cannot be compensated making secure fastening difficult
Solution Approach 1:
The holding disk is designed with elastic deformation capability, transforming from a rigid static structure to a dynamic adaptive structure. The holding disk can elastically deform during mounting to accommodate position tolerances of fastening studs, while maintaining structural simplicity and quick mounting capability.
Solution Approach 2:
The elastic modulus and geometric parameters of the holding disk are optimized to enable controlled elastic deformation. By changing the stiffness parameters of the holding disk, the system can adapt to varying position tolerances while maintaining simple mounting operation.
2Measurement precision
If the fastening projections contact the component surface during preliminary connection, then positioning accuracy is improved, but the device loses relocatability and cannot adjust to fastening stud position variations
Solution Approach 1:
The elastic distance member is pre-installed to maintain a predetermined distance between fastening projections and the component surface during preliminary connection. This preliminary configuration allows relocatability for position adjustment, while the elastic nature enables subsequent contact for positioning accuracy when needed.
Solution Approach 2:
The elastic distance member acts as an intermediary between the fastening projections and the component surface. It controls the contact timing and manner, allowing the projections to remain non-contacting during relocation while enabling controlled contact for positioning during final fastening.
3Adaptability or versatility
If the holding disk is designed to be movable relative to the component during preliminary connection, then position adjustment is enabled, but secure fastening cannot be achieved without elastic deformation mechanism
Solution Approach 1:
The holding disk transitions from a movable state during preliminary connection to a secured state during fastening. The elastic deformation capability enables this transition, allowing position adjustment when needed while providing secure fastening when required, thus achieving both adaptability and reliability.
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 solution allows for simple relocation and secure fastening of components, compensating for production tolerances and preventing undesired loosening during operation, ensuring reliable attachment to automobile body parts.
Implementation Method 1
the distance member is elastically deformed during a mounting of the fastening stud guided through the through holes of the holding disk and the component in the insertion section such that the fastening projections can contact the second contact surface of the component
Data Source
AI summary
A device for fastening a component to a fastening stud includes a holding member and a holding disk for contacting first and second surfaces of the component, respectively. The holding member and holding disk are preliminarily connected with one another, without the fastening stud, each in the state contacting the component. The holding disk has fastening projections and at least one elastic member which prohibits the fastening projections from contacting the second surface of the component, so that the device is moveable with regard to the component in a direction perpendicular to the moving direction of the fastening stud through a through hole of the holding disk. The elastic member is elastically deformed upon mounting of the fastening stud through the through holes of the holding disk and the component, such that the fastening projections contact the second surface of the component.