Modular Cam Unit for Reduced Assembly Complexity
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Solution Overview
Problem
Existing camshaft designs face challenges in optimizing manufacturing costs and assembly complexity, particularly in closed bearing receptacles, where the assembly of camshafts with rotationally fixed and axially displaceable cam units is complicated due to tight installation spaces and increased friction.
Innovation Solution
The cam unit is subdivided into individual prefabricated components made from different materials, allowing for optimal configuration and assembly by using a tubular sleeve base body with separately manufactured cam elements and track elements, which can be connected via press, form, solder, or weld connections, ensuring rotational fixity and axial displacement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a cam unit is designed as a single integrated component, then manufacturing precision and structural integrity are improved, but device complexity and assembly difficulty increase
Solution Approach 1:
The cam unit is divided into separate components: a camshaft base body and axially displaceable cam elements. Each cam element can be manufactured and prepared separately, then assembled onto the camshaft base body in a simplified sequence, reducing overall assembly complexity while maintaining precision through dedicated manufacturing processes for each component.
2Stability of the object's composition
If camshaft assembly is performed in closed bearing receptacles, then structural compactness is improved, but ease of operation and assembly ease deteriorate
Solution Approach 1:
Cam elements are prepared in advance with axial displacement capabilities and rotational fixation features before assembly. The cam elements are pre-configured with their cam track profiles and mounting interfaces, allowing them to be installed into the closed bearing receptacle in a straightforward axial motion without requiring complex in-situ assembly operations.
3Ease of manufacture
If conventional materials are used for cam units, then manufacturing cost is reduced, but functional performance and reliability deteriorate
Solution Approach 1:
The cam unit employs different materials for different components: the camshaft base body can be made from conventional structural steel, while the cam elements are made from specially hardened or sintered metals. This composite material approach allows each component to be optimized for its specific functional requirements, improving overall reliability while controlling manufacturing costs through selective material application.
Data Source
Figure 1
Figure 2a~2b
Figure 2c~2d
AI summary
The invention relates to a cam unit (1) for arranging on a camshaft main part (2) of a camshaft in a rotationally fixed and axially movable manner, comprising a tubular sleeve main part (11) and at least one cam element (12) that lies on the sleeve main part (11) in a rotationally fixed and non-movable manner. According to the invention, the sleeve main part (11) and the at least one cam element (12) are designed as individual parts that can be separately produced and subsequently assembled.