Annular Collar Fastening for Hydraulic Caps Under Caulking Load
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional fastening systems for annular bodies in hydraulic devices, such as brake boosters, face issues with maintaining a secure and resilient connection during operation, especially under hydraulic forces, due to the risk of radially inward displacement and detachment of the side wall from the element.
Innovation Solution
The fastening system incorporates an annular recess with a retaining contour and a radially spaced collar, ensuring a form-fitting interaction that prevents inward displacement and maintains a tight seal, with optional features like interference fits, sealing sections, and elastically deformable elements to enhance the connection's stability and load capacity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the element is plastically deformed to engage behind the collar, then the connection strength is improved, but the side wall may move radially inward and detach from the element
Solution Approach 1:
The retaining contour is designed to preemptively counteract the radially inward movement of the side wall that would occur during plastic deformation. By providing this counteracting geometric feature before the deformation process, the system prevents detachment while allowing the strengthening deformation to proceed.
Solution Approach 2:
The solution introduces a new geometric dimension - the retaining contour with its specific profile - that operates in the radial direction to control side wall movement. This additional dimensional control feature allows the deformation process to strengthen the connection without compromising reliability.
2Device complexity
If the collar is positioned close to the lateral outer wall, then the fastening is more compact, but the collar may be damaged during the caulking process
Solution Approach 1:
The retaining contour creates a localized protective region between the collar and the lateral outer wall. This local geometric feature provides damage protection precisely where the collar is most vulnerable during the caulking process, while maintaining overall compactness of the fastening system.
3Ease of manufacture
If conventional caulking is performed without a retaining contour, then the manufacturing process is simpler, but the connection is not permanently tight and resilient under hydraulic forces
Solution Approach 1:
The retaining contour is pre-formed in the element before the caulking process begins. This preliminary geometric feature ensures that when caulking occurs, the side wall is already constrained and guided to achieve permanent tightness, eliminating the need for complex multi-step manufacturing processes.
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 configuration ensures a durable and resilient connection that remains tight during operation, preventing detachment under hydraulic forces and ensuring a high load capacity, even under high pressures, while minimizing the risk of damage during assembly.
Implementation Method 1
the element is or will be plastically deformed in such a way that the material of the element is or will be displaced to engage behind the collar
Implementation Method 2
the retaining contour is configured to interact in a form-fitting manner with the collar at least in a direction facing away from the lateral outer wall
Implementation Method 3
the circular ring shape ensures advantageous interaction between the element and the annular body, in particular during the caulking process, because forces are evenly distributed and transmitted
Implementation Method 4
the collar forms an interference fit with the lateral outer wall of the recess
Data Source
AI summary
A fastening system for fastening an annular body, in particular a covering cap, end shield, or the like. The fasting system includes an annularly extending side wall having an outer side and an inner side and comprising a collar which projects radially from the outer side, to an element, in particular a housing, hydraulic block or the like, which includes a receiving region for the collar. For fastening the annular body to the element, the element is or will be plastically deformed in such a way that the material of the element is or will be displaced to engage behind the collar. The element includes an annular recess having a caulkable lateral outer wall and having a retaining contour which is radially spaced apart from the lateral outer wall. The retaining contour is configured to interact in a form-fitting manner with the collar.