Electric Motor Auxiliary Drive Bearing Alignment
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Solution Overview
Problem
Existing electric-motor auxiliary drives for vehicles face challenges in ensuring precise radial alignment of bearings, leading to potential shaft deflection and premature failure due to alignment errors during operation.
Innovation Solution
The design incorporates a third bearing with a cross-sectional constriction, allowing for axial displacement to detect and correct alignment errors, ensuring the armature shaft is radially supported by three bearings without alignment errors, and includes a method to monitor and adjust the bearings' alignment during production and mounting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If three bearings are used to radially support the armature shaft, then the radial support and stability of the shaft is improved, but the alignment precision between bearings becomes more difficult to maintain
Solution Approach 1:
A test element is introduced as an intermediary component between the bearings and the armature shaft. This test element serves as a mediator to detect alignment errors during assembly and enables adjustment mechanisms to correct misalignment, thereby maintaining bearing alignment precision while preserving the stability benefits of three-bearing support
Solution Approach 2:
The alignment of bearings is checked and adjusted before final assembly using the test element. By performing preliminary alignment detection and correction during the assembly process rather than relying on post-assembly adjustments, the system ensures precise bearing alignment while maintaining the structural stability of the three-bearing configuration
2Manufacturing precision
If alignment detection and adjustment mechanisms are added to the bearing system, then the manufacturing and mounting precision is improved, but the device complexity increases
Solution Approach 1:
The test element enables the assembly process to self-detect and self-correct alignment errors. The mechanism allows workers to visually or mechanically detect misalignment through the test element and make direct adjustments, eliminating the need for complex external measurement equipment or specialized alignment tools
Solution Approach 2:
The system uses observable parameter changes in the test element (such as positional displacement or visual indicators) to detect alignment errors. By monitoring these simple parameter changes rather than requiring complex measurement systems, the invention achieves precise alignment detection with minimal added complexity
Data Source
AI summary
Electric-motor auxiliary drive for vehicles, in particular screen-wiper drive, having an electric motor and a gear mechanism, having at least two housing elements which are connected to one another and having a shaft which is mounted in a first housing element by way of at least one first bearing and in a second housing element by way of at least one second and one third bearing.