Angular Position Measuring Device Axial Spring Motion Limiting
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Solution Overview
Problem
Angular position measuring devices face challenges in reliable and quick assembly, as existing couplings can become stressed during mounting, leading to reduced spring excursion and compromised measurement accuracy due to axial compression.
Innovation Solution
An angular position measuring device with a coupling exhibiting elastic spring behavior and a stopping element that can transition between neutral and stopping positions, limiting axial spring motions, is designed to prevent coupling compression and maintain measurement accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a coupling with elastic spring behavior is used to compensate axial and radial relative motions, then alignment errors between shafts are compensated and forces are reduced, but the coupling may become stressed during assembly leading to reduced spring excursion and compromised measurement accuracy
Solution Approach 1:
The stopping element is pre-configured in a neutral position during assembly that allows free axial spring motion of the coupling. This preliminary state prevents the coupling from becoming stressed during the assembly process, ensuring that the coupling maintains its full spring excursion capability after assembly, thereby preserving measurement accuracy while enabling reliable assembly.
2Reliability
If the shaft is fixed with respect to the housing to stop spring motions of the torque support, then the spring motions are limited, but the assembly process becomes more complex and time-consuming
Solution Approach 1:
The stopping element is designed to be movable between a neutral position (allowing free axial spring motion during assembly) and a stopping position (limiting spring motion after assembly). This dynamic design allows the system to adapt to different operational phases: during assembly, the element remains in the neutral position enabling quick assembly without stress on the coupling; after assembly, it can be moved to the stopping position to provide stability and limit spring motion, thus resolving the contradiction between assembly speed and coupling stability.
3Reliability
If the stopping element is always in the stopping position to limit axial spring motion, then the coupling is protected from over-compression, but the assembly process becomes more difficult and time-consuming
Solution Approach 1:
The stopping element is pre-configured in a neutral position that allows free axial spring motion during the assembly process. This preliminary state ensures that the coupling can be assembled easily without restriction, and only after assembly is complete does the stopping element need to be moved to the stopping position to provide protection from over-compression. This sequence resolves the contradiction by ensuring ease of manufacture during assembly while providing coupling protection in operation.
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 solution enables reliable and quick assembly of the angular position measuring device, ensuring the coupling remains unstressed and maintains its original spring excursion capability, thereby preserving measurement accuracy.
Implementation Method 1
a coupling (3) arranged on the second assembly (1.2) having an elastic spring behavior in a direction of the axis
Data Source
AI summary
An angular position measuring device includes two assemblies. The first assembly is rotatable with respect to the second assembly about an axis. A coupling is arranged at the second assembly, which has an elastic spring behavior in the direction of the axis. Furthermore, a stopping element is assigned to the angular position measuring device. The angular position measuring device is attachable to a machine part. If coupling is not prestressed, there is a free gap between the machine part and the second assembly, having an extension in the direction of the axis. The stopping element is able to be brought into a stopping position in which at least one region of the stopping element is in operative connection to the second assembly for the limitation of the axial spring motions. A measuring system includes such an angular position measuring device.