Angular Displacement Detector Mounting with Clearance and Blocking Means
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Solution Overview
Problem
Existing angular displacement detectors face issues with friction and load-bearing forces due to contact between the support and housing, leading to inaccurate measurements and premature wear, as well as thermal expansion problems in plastic components.
Innovation Solution
A method involving a clearance between the support and housing, with retractable blocking means that maintain the support in an initial position during mounting and then free it for operational use, eliminating direct contact and friction, ensuring precise measurements and reduced wear.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the support and housing are assembled together with contact between target and sensor, then the device structure is compact and easy to manufacture, but friction and load-bearing forces cause inaccurate measurements and premature wear
Solution Approach 1:
The device is divided into separate functional components: the support carrying the target is dissociated from the housing containing the sensor. This segmentation allows each component to be manufactured and assembled independently, then combined with precise positioning to eliminate contact between moving and fixed parts, resolving the contradiction between ease of manufacture and measurement accuracy.
Solution Approach 2:
The target support is extracted from the housing structure and mounted directly onto the rotary shaft. This extraction removes the source of friction and contact forces that caused measurement inaccuracies, while the housing remains separately mounted onto the fixed element, maintaining manufacturing simplicity.
2Stability of the object's composition
If the support and housing are assembled together, then the device structure is stable during mounting, but friction leads to thermal expansion problems in plastic components
Solution Approach 1:
The target support is extracted from the housing and mounted directly on the rotary shaft, eliminating the contact interface that generated friction and subsequent thermal expansion in plastic components. The housing remains separately mounted on the fixed element, maintaining structural stability without the harmful thermal effects.
Solution Approach 2:
The invention converts the potential harm of friction-induced thermal expansion into a benefit by designing a clearance between the support and housing that prevents contact from the outset. The blocking means ensure stable mounting during assembly, then release to allow free movement during operation, eliminating thermal expansion issues while maintaining structural stability.
3Reliability
If the target is directly mounted onto the rotary shaft and housing onto the fixed element, then friction between support and housing is eliminated, but mounting problems and geometry issues (concentricity) arise
Solution Approach 1:
The support is preliminarily positioned with blocking means that constrain it within the housing during assembly. This preliminary action ensures proper alignment and concentricity before the final operational position is reached, eliminating mounting problems while maintaining the frictionless contact between support and housing.
Solution Approach 2:
The blocking means act as an intermediary mechanism during the mounting process, facilitating proper alignment and concentricity between the support and housing. Once the operational position is achieved, the blocking means are released, allowing the support to move freely without friction while maintaining geometric accuracy.
4Stability of the object's composition
If blocking means are used to maintain support position during mounting, then mounting stability is improved, but device complexity increases
Solution Approach 1:
The blocking means are designed to be dynamic rather than static - they are active during the mounting process to provide stability, then automatically become inactive once the operational position is reached. This dynamic behavior allows the system to achieve both mounting stability and operational simplicity without permanent complexity.
Solution Approach 2:
The blocking means provide preliminary stabilization during assembly, then are released to allow free movement during operation. This preliminary action ensures proper positioning during mounting without requiring complex permanent constraints, thereby limiting the increase in device complexity to only the mounting phase.
Data Source
AI summary
The object is to ensure the absence of friction between a housing supporting a sensor and a mounting arranged to support a target, and the absence of load take-up resulting from the contact and lack of precision among mounting interfaces. This involves forming, in a mounting position, a clearance between the mounting and the housing and then releasing the target mounting in the operative position of the sensor. A cylindrical recess for freely receiving with a clearance the mounting supporting the reference element serving as a target and which is mountable on the shaft, is provided in the housing which supports the sensor and which is attachable to the stationary part. Removable locking elements provided between the mounting and the housing maintain the latter in an initial position when the locking elements are operative and, when inoperative, release the mounting mounted on the rotary shaft from the housing.