Axially Displaceable Cam Pack Structure Design
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Solution Overview
Problem
Existing camshafts with axially displaceable cam packs require expensive carrier tubes for mounting and adjusting members, leading to complex and costly production processes, as well as the need for multiple processing operations.
Innovation Solution
The cams and adjusting members are connected in an axially adjacent configuration, eliminating the need for a carrier tube, allowing for direct mounting on the carrier shaft and individual machining and heat treatment of components, with inner toothing engagement and latching grooves for axial displacement and torque transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a carrier tube is used to mount cams and adjusting members, then the cam pack structure is complete and functional, but the production cost increases and manufacturing complexity increases
Solution Approach 1:
The patent merges the carrier tube function with the cam elements themselves. The cam elements are directly connected to one another in an axially adjacent configuration, eliminating the need for a separate carrier tube. This combining of functions reduces the number of components and simplifies manufacturing while maintaining structural integrity and functionality.
2Reliability
If a carrier tube is used to mount cams and adjusting members, then the cam pack structure is complete and functional, but the number of processing operations increases
Solution Approach 1:
By combining the cam elements directly in an axially adjacent configuration, the patent eliminates multiple assembly and processing operations that would be required if a separate carrier tube were used. The inner toothing is integrated directly into the cam elements, reducing the number of machining and assembly steps.
3Ease of manufacture
If cams and adjusting members are connected in an axially adjacent configuration, then production costs decrease and manufacturing is simplified, but the structure becomes more complex
Solution Approach 1:
The patent segments the cam pack into individual cam elements that are connected in an axially adjacent configuration. Each cam element can be manufactured separately with individual machining and heat treatment, then assembled by connecting them axially. This segmentation allows for simplified manufacturing of individual components while the overall structure achieves functionality through their coordinated arrangement.
4Power
If inner toothing engagement is used for axial displacement, then torque transmission is efficient, but the manufacturing precision requirements increase
Solution Approach 1:
The inner toothing is segmented across multiple cam elements rather than requiring a single precision-machined carrier tube. This allows the toothing to be manufactured on individual, smaller components where achieving precise gear engagement is more feasible, while still providing effective torque transmission when the elements are assembled together.
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 simplifies the structure, reduces production costs, and enables efficient axial displacement and rotation transmission, while allowing for defined axial positions and high mechanical load resistance.
Implementation Method 1
the rotary motion of the carrier shaft is transmitted via a geometrical form-fit connection to the carrier tube
Implementation Method 2
The carrier tube comprises axial stops, in which curved paths are introduced on the external periphery, said curved paths being able to cooperate with a transmission element
Data Source
AI summary
A camshaft includes a carrier shaft which can be mounted rotatably along a shaft axis and at least one cam pack disposed axially displaceably on the carrier shaft. The cam pack includes at least two cams and at least one adjusting member for axial adjustment of the cam pack. The cams and the at least one adjusting member are connected to one another in an axially adjacent configuration and can be mounted axially displaceably as a composite structure in a direct configuration on the carrier shaft. A method for producing a camshaft and a cam pack are also provided.