Position Sensor Fixation via Intermediary Fitting
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional position detecting sensors for actuators experience reduced detection accuracy due to changes in the relative positional relationship between the detector and the actuator during fixation, and they suffer from durability issues when pressed excessively against the installation groove, especially when made from resin materials.
Innovation Solution
A position detecting sensor design that includes a hollow holder made from resin with a sensor and lead wires, a fitting with a pin and screw mechanism, and an engaging projection to securely attach to a cylinder apparatus, maintaining a consistent distance between the sensor and the piston for improved accuracy and using a metallic fitting for enhanced durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the housing is pressed against the inner wall surface of the installation groove to fix the position detecting sensor, then the sensor is fixed with respect to the installation groove, but the distance between the detector and the piston changes from the preset distance, reducing detection accuracy
Solution Approach 1:
A fitting is introduced as an intermediary component between the position detecting sensor and the installation groove. The fitting is threaded into the installation groove and provides a mounting surface for the sensor, allowing the sensor to be fixed without direct pressing against the groove wall, thereby maintaining the preset distance between the detector and piston while achieving stable fixation.
2Reliability
If the housing is pressed at excessive force against the inner wall surface of the installation groove to fix the sensor, then the sensor is securely fixed, but the load on the sensor increases and durability is reduced, especially when the housing is made from resin material
Solution Approach 1:
The fitting serves as a mediator that distributes and transfers the fixation load. Instead of the resin housing directly bearing the excessive pressing force against the installation groove wall, the fitting (which can be made from more durable material) absorbs this load, protecting the sensor and housing from damage while maintaining secure fixation.
3Device complexity
If the housing is made from resin material to reduce weight and complexity, then the device is lighter and simpler, but the durability is lowered when excessive pressing force is applied during fixation
Solution Approach 1:
The system uses a composite structure where the housing is made from lightweight resin material while the fitting can be made from more durable material. This combination allows the resin housing to maintain its weight and complexity advantages while the durable fitting compensates for the resin's lower strength under excessive pressing forces.
Data Source
AI summary
A position detecting sensor is equipped with a holder capable of accommodating a sensor member therein on which a magnetic sensor is disposed. A connector formed on an end of the holder is connected to a fitting through a connecting bolt. The fitting is disposed by insertion into a sensor groove of a cylinder apparatus, and after insertion of the fitting into the sensor groove, the holder and the fitting are fastened by the connecting bolt, thereby fixing the holder with respect to the cylinder apparatus.