Sensor Unit Clamping Angle for Space-Constrained Field Housings
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Solution Overview
Problem
Field devices in automation technology face challenges in securely affixing sensor units to housings with limited space, especially when a securement region is constrained between a sealing element and the opening of the passageway, requiring a space-saving solution that maintains sufficient locking strength.
Innovation Solution
A field device design incorporating a clamping angle and screw mechanism that allows for adjustable positioning within the housing, utilizing a clamping angle section to radially secure the sensor unit, which can be optimized for small securement regions and prevents twisting or removal, with optional loss prevention features like pin-shaped elements or slit rings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a screw of sufficient tensile strength (e.g., M6 or larger) is used to secure the sensor unit, then the locking strength is sufficient, but the device dimensions increase and space requirements are not met
Solution Approach 1:
The clamping angle element transforms the securing mechanism from a purely axial force application (screw pressing directly on sensor unit) to a radial clamping action. The clamping angle element is pressed by the screw against the sensor unit's clamping region, creating a radial clamping force that is more efficient for securing cylindrical components. This dimensional change in force application allows smaller screw sizes while maintaining sufficient locking strength.
Solution Approach 2:
The clamping angle element serves as an intermediary between the screw and the sensor unit. Instead of the screw directly securing the sensor unit (which would require large dimensions for sufficient strength), the clamping angle element mediates the force transmission. This intermediary allows the screw to apply force more efficiently through the angled clamping action, reducing the required screw size and overall device dimensions.
2Reliability
If the securement region is placed between the sealing element and the passageway opening, then the electronic components are protected, but the available space for securement is severely constrained
Solution Approach 1:
The clamping angle element utilizes the radial dimension for clamping action rather than requiring additional axial space. By pressing the clamping angle element radially against the sensor unit's clamping region, the mechanism achieves effective securing within the constrained axial space between the sealing element and passageway opening. This radial clamping approach maximizes the use of available space in the constrained securement region.
Data Source
AI summary
The present disclosure relates to a field device of automation technology, comprising a housing and a sensor unit sensitive for a process variable of a medium. The housing has a passageway to accommodate the sensor unit and the sensor unit protrudes from the housing through a terminal opening of the passageway. A clamping angle and a screw are introduced into the housing in a region of the housing adjoining the opening of the passageway. By means of the screw the clamping angle is shiftable in the housing a predeterminable distance in the direction of the sensor unit, and the clamping angle shifted in the direction of the sensor unit is embodied to press with a first clamping angle section of the clamping angle radially on a clamping region of the sensor unit arranged in the housing and facing the opening of the passageway.