Angle-Measuring Scanning Unit With Elastic Centering and Axial Spacing
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Solution Overview
Problem
Bearingless angle-measuring devices face challenges in maintaining the precise relative position of rotatable component groups, particularly ensuring correct axial distance, which affects the accuracy of angular position determination.
Innovation Solution
A scanning unit design featuring a circuit board with a detector assembly and evaluation electronics, a contact carrier with axial electrical contacts, and a housing body with elastic elements to ensure centering and axial spacing, providing a torsionally rigid attachment and axial flexibility, allowing for precise angular position measurement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If bearingless angle-measuring devices are used, then device complexity is reduced, but maintaining precise relative position and axial distance becomes difficult
Solution Approach 1:
The device is divided into modular components: a scanning unit with circuit board and detector assembly, a housing body with opening, and a contact carrier. This segmentation allows each component to be manufactured and assembled separately, reducing overall device complexity while maintaining precision through controlled interfaces between segments.
Solution Approach 2:
The contact carrier acts as an intermediary element between the circuit board and the housing body. It provides a standardized interface that ensures precise relative positioning and axial spacing without requiring complex integral bearings, thus reducing device complexity while maintaining manufacturing precision.
2Manufacturing precision
If integral bearings are used, then relative position is maintained precisely, but device complexity increases
Solution Approach 1:
The integral bearing is extracted and replaced by a simpler mounting structure consisting of a housing body with an opening and a contact carrier. This extraction eliminates the complexity of integral bearings while maintaining precise relative positioning through the standardized interface provided by the contact carrier extending into the housing opening.
3Measurement precision
If torsionally rigid attachment is used, then angular position measurement accuracy is improved, but adaptability to vibrations and shocks decreases
Solution Approach 1:
The circuit board is attached to the housing body with torsionally rigid characteristics at specific locations to ensure measurement accuracy, while the contact carrier provides localized flexibility to accommodate vibrations and shocks. This local differentiation of mechanical properties allows the system to simultaneously achieve high measurement precision and robustness against external influences.
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
The design enables precise and economical manufacturing of bearingless angle-measuring devices, ensuring accurate angular position determination and robustness against external influences like vibrations and shocks.
Implementation Method 1
A first elastic element is disposed under radial preload between the inner wall of the opening and the outer wall of the contact carrier such that the contact carrier is centered with respect to the inner wall of the opening
Data Source
AI summary
A scanning unit for determining a relative angular position of an angular scale that is rotatable about an axis relative to the scanning unit includes a circuit board and evaluation electronics. A detector assembly is disposed in a manner that enables scanning of the angular scale. A contact carrier encloses electrical contacts for creating a plug-and-socket connection. The contact carrier has an outer wall and is mounted on the circuit board such that the electrical contacts extend in a direction having an axial component. A housing body is provided with an opening having an inner wall. A first elastic element is disposed under radial preload such that the contact carrier is centered with respect to the inner wall of the opening. The circuit board is torsionally rigidly attached to the housing body such that the circuit board is radially spaced therefrom by a first gap.