Camshaft Sliding Module With Press-Fit Cam Segment Positioning
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Solution Overview
Problem
Existing camshaft configurations face manufacturing complexity and cost issues due to the need for custom cam elements for each motorization, and the cam elements tend to slip on sliding sleeves during operation, disrupting axial movement and functionality.
Innovation Solution
A sliding module with a sliding sleeve and cam segment featuring a positioning section with a surface structure for a press-fit connection, a stop region to absorb axial forces, and a through opening for coaxial alignment with the load-bearing shaft, preventing cam segment displacement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If cam elements are pressed onto the sliding sleeve to enable modular construction, then manufacturing complexity is reduced and versatility is improved, but the cam elements slip on the sliding sleeve during operation due to axial forces
Solution Approach 1:
The cam element is divided into a cam body and a cam segment that can be separately mounted on the sliding sleeve. The cam segment is pressed onto the sliding sleeve and can be independently replaced or adjusted, enabling modular construction while maintaining secure positioning through the segmented design.
Solution Approach 2:
A pressing device is used to pre-compress the cam segment onto the sliding sleeve before operation. This preliminary compression action ensures that the cam segment is firmly secured in advance, preventing slippage during subsequent operational axial forces while maintaining the benefits of modular assembly.
2Stability of the object's composition
If stop means are used to limit axial movement of cam elements, then axial movement is controlled, but the complexity of the cam element configuration increases
Solution Approach 1:
The stop means are integrated directly into the sliding sleeve structure rather than being separate components. The sliding sleeve includes built-in stop surfaces that limit the axial movement of the cam segment, combining the functions of the sleeve and stop means into a single element, thereby controlling axial movement without increasing overall structural complexity.
Solution Approach 2:
The sliding sleeve serves multiple functions: it guides the cam element, provides stop means to limit axial movement, and acts as a mounting surface for the cam segment. This multi-functional design eliminates the need for separate stop components, reducing complexity while maintaining effective axial movement control.
3Reliability
If custom cam elements are manufactured for each motorization, then specific performance requirements are met, but manufacturing costs and complexity increase considerably
Solution Approach 1:
The cam element is segmented into a standardized sliding sleeve and interchangeable cam segments. Different cam segments can be mounted on the same sliding sleeve to accommodate different motorization requirements, eliminating the need to manufacture entirely custom cam elements for each application while maintaining performance specificity.
Solution Approach 2:
A single standardized sliding sleeve design can accommodate multiple different cam segments, creating a universal base component that works across different motorizations. This allows manufacturers to produce a limited number of standardized sleeves and a variety of interchangeable cam segments, significantly reducing manufacturing complexity and cost compared to creating custom integrated cam elements for each motorization.
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
Enables simple and cost-effective manufacturing of various camshafts and sliding modules, ensuring correct axial movement and functionality by absorbing axial forces and maintaining a fixed position of the cam segment relative to the sliding sleeve.
Implementation Method 1
a positioning section (2) having a surface structure (3) on an outer circumferential face (1.1) of the sliding sleeve for producing a press-fit connection with a cam segment (6)
Data Source
AI summary
A sliding module having a sliding sleeve and at least one cam segment having at least one cam. The sliding sleeve has a positioning section for positioning the cam segment fixedly against rotation and displacement. The positioning section includes a surface structure on the outer circumferential face of the sliding sleeve for producing a press-fit connection between the cam segment and the sliding sleeve. A stop region is provided configured to limit an axial movement of the cam segment.