Axial Plug-in Camshaft Adjuster
Solution Overview
Problem
Existing camshaft adjustment devices with a shaft-in-shaft system require significant installation space and incur high manufacturing costs due to the width of the toothing and associated gearings.
Innovation Solution
The camshaft adjustment device employs axially engaging toothings as drivers in the connection areas, eliminating the need for radial couplings and allowing for a more compact design, with optional elastic elements for damping and conical cross-sectional drivers for reduced play, and a one-piece driver design for simplified assembly and reduced costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If wide gear wheels with peripheral toothing are used to drive the stator, then reliable power transmission is achieved, but installation space requirement increases
Solution Approach 1:
The patent transitions from radial toothing (peripheral gear wheels) to axial toothing (axially extending drivers), effectively changing the dimensional orientation of the power transmission interface. This allows the stator to be driven in the axial direction rather than radially, significantly reducing the required installation space while maintaining transmission reliability
Solution Approach 2:
Instead of using conventional radial gear wheels to drive the stator, the patent inverts the approach by using axially extending drivers that engage with axial toothing on the stator. This inverted configuration eliminates the need for wide peripheral gear wheels and reduces the overall installation space
2Power
If wide gear wheels with peripheral toothing are used to drive the stator, then power transmission is achieved, but manufacturing costs increase
Solution Approach 1:
The patent changes the orientation of power transmission from radial to axial, using axially extending drivers instead of wide peripheral gear wheels. This dimensional change simplifies the manufacturing process and reduces costs while maintaining adequate power transmission capability for camshaft adjustment applications
Solution Approach 2:
The patent extracts and eliminates the complex peripheral toothing and wide gear wheel components from the system. By using simpler axially extending drivers with axial toothing, the design removes unnecessary complexity and reduces manufacturing costs while retaining the essential power transmission function
3Ease of manufacture
If axial plug-in connection is used for connection areas, then assembly is simplified and costs are reduced, but coupling reliability may be compromised
Solution Approach 1:
The patent applies local quality by providing multiple axially extending drivers distributed around the connection interface. Each driver engages with corresponding axial toothing, and the distributed arrangement ensures that local engagement points work together to provide reliable overall coupling while maintaining simple axial assembly
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 design reduces installation space requirements and production costs by eliminating the need for radial couplings and expensive peripheral gearings, while maintaining reliable power transmission and allowing for dynamic operation synchronism.
Implementation Method 1
a phase shift between the first shaft and the second shaft is provided by a rotor and a stator hydraulically coupled to the rotor
Data Source
Figure 1
Figure 2~3
AI summary
The camshaft adjustment device (10) has a shaft-in-shaft system (16) comprising two shafts (12,14) that are arranged coaxial to each other. A connection area (38) is arranged on the former shaft in a torque-proof manner, and another connection area (42) is arranged on a stator (44) in a torque-proof manner. An axially extending attachment (20) is arranged such that the two connection areas are coupled with each other. The two connection areas and the attachment are formed as an axial plug-in connection.