Fluid Pressure Cylinder Assembly with Preliminary Sensor Rod Insertion
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Solution Overview
Problem
Existing fluid pressure cylinders face difficulties in assembling the piston rod into the cylinder tube due to limited directional alignment, as the sensor rod's axis is influenced by gravitational forces when the cylinder tube is inclined, making it challenging to insert the sensor rod into the piston rod's hole.
Innovation Solution
A fluid pressure cylinder design that includes a position sensor with a sensor body and rod, where the sensor rod is inserted into the piston rod's hole, and a holding member is used to secure the sensor body to the piston rod, allowing the piston rod to be inserted into the cylinder tube without directional limitations, and the sensor body is subsequently fixed to the cylinder tube.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the sensor body is fixed to the cylinder tube and the piston rod is inserted with the axis aligned vertically, then the sensor rod can be inserted into the hole in the piston rod, but the manufacturing process is limited to specific directions and reduces assembly flexibility
Solution Approach 1:
The sensor rod is preliminarily inserted into the hole in the piston rod before the piston rod is inserted into the cylinder tube. This preliminary action ensures that the sensor rod is already positioned correctly in the piston rod, eliminating the need for precise directional alignment during the final assembly step. The sensor body is then fixed to the cylinder tube after the piston rod insertion, completing the assembly in a direction-independent manner.
2Adaptability or versatility
If the cylinder tube is inclined with respect to the vertical direction during assembly, then assembly flexibility is improved, but the sensor rod cannot be properly inserted into the piston rod hole due to gravitational influence on the sensor rod axis
Solution Approach 1:
The sensor rod is preliminarily inserted into the hole in the piston rod while the piston rod is held separately from the cylinder tube, before the final assembly step. This preliminary insertion is performed when gravitational influence on the sensor rod is minimized or controlled, ensuring proper axis alignment. After this preliminary action, the piston rod with the pre-inserted sensor rod is then inserted into the cylinder tube at any orientation, achieving both precision and flexibility.
Data Source
AI summary
A manufacturing method of a fluid pressure cylinder includes inserting the sensor rod into a hole extending in the piston rod, holding the sensor body with respect to the piston rod by using a holding member mounted on the piston rod, inserting the piston rod into the cylinder tube, and fixing the sensor body to the cylinder tube by fixing the holding member to the cylinder tube.