Sensor Bearing Assembly With Orientation Lug for Rotor Alignment
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Solution Overview
Problem
The complex process of aligning the rotor magnet with the impulse ring in sensor bearing units during motor assembly is challenging, leading to potential misalignment and requiring time-consuming electronic compensation by trained professionals.
Innovation Solution
The design incorporates an orientation lug on the impulse ring that fits into a groove on the shaft, along with radial protrusions and recesses on the sensor housing and printed circuit board, ensuring easy assembly and maintaining predetermined angular positions, thereby simplifying the alignment process and preventing angular movement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If mechanical alignment of rotor magnet with impulse ring is performed during assembly, then alignment precision is improved, but assembly complexity increases
Solution Approach 1:
The patent applies preliminary action by pre-configuring the orientation lug and groove structure before assembly. The orientation lug is pre-positioned on the rotor magnet assembly and the groove is pre-formed on the impulse ring, allowing the alignment to be automatically achieved during a simple insertion operation rather than requiring complex post-assembly adjustment procedures
Solution Approach 2:
The orientation lug acts as an intermediary element that mediates between the rotor magnet and the impulse ring. This intermediate structure provides a mechanical interface that automatically establishes the correct angular relationship between components during assembly, eliminating the need for complex alignment procedures
2Manufacturing precision
If electronic compensation is performed for misalignment, then alignment precision is improved, but time consumption increases
Solution Approach 1:
The patent applies self-service by designing the mechanical alignment structure (orientation lug and groove) to automatically perform the alignment function without requiring external electronic compensation systems. The mechanical features self-align the components during assembly, eliminating the need for time-consuming electronic calibration procedures that would otherwise be required to correct misalignment
3Manufacturing precision
If professional training is required for alignment, then alignment precision is improved, but operational complexity increases
Solution Approach 1:
The orientation lug and groove structure serves as a mechanical intermediary that guides the alignment process, making it intuitive and straightforward. The physical fit between the lug and groove naturally indicates correct positioning, allowing operators without specialized training to achieve precise alignment through simple mechanical insertion rather than requiring complex electronic adjustment procedures
Data Source
AI summary
A sensor bearing unit includes a bearing having an inner ring and an outer ring centered on an axis, an impulse ring secured to the inner ring of the bearing, and a sensor device for detecting rotational parameters of the impulse ring including a sensor housing secured to the outer ring of the bearing and at least one sensor element supported by the sensor housing and cooperating with the impulse ring. The impulse ring is provided with an orientation lug extending axially on the side opposite to the inner ring of the bearing and intended to be located into a groove formed on the shaft of an associated apparatus.