Working Cylinder Coupling With Welded Adapter for Angular Adjustment
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Solution Overview
Problem
Existing working cylinders, particularly hydraulic ones, face challenges in production due to increased material thickness and weight from thread insertion, which leads to higher material consumption and intricate machining, along with difficulties in matching threads for precise angular positioning and tightening torque.
Innovation Solution
A working cylinder design featuring a cylinder tube and piston unit with a special coupling section using a hollow cylindrical adapter body with internal and external threads, where the adapter body is positively connected to the cylinder tube via a circumferential ring weld seam, allowing for adjustable angular positioning and optimized material selection, reducing material usage and enabling cost-effective production.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If thread insertion is used to connect closure parts to cylinder tube, then reliable connection is achieved, but material thickness must be increased leading to higher weight and material consumption
Solution Approach 1:
The connection system is divided into two separate components: a threaded adapter body that connects to the cylinder tube, and a closure part that screws onto the adapter body. This segmentation allows the cylinder tube to maintain its original wall thickness without threads, while the adapter body absorbs the threading requirements.
Solution Approach 2:
The threaded adapter body serves as an intermediary component between the cylinder tube and the closure part. It mediates the connection by providing the threaded interface separately from the cylinder tube, allowing the tube to remain structurally optimal while still achieving reliable threaded connection.
2Reliability
If thread insertion is used for connection, then closure parts can be securely attached, but machining complexity increases due to intricate machining of long cylinder tubes
Solution Approach 1:
The machining operations are segmented between the adapter body and the cylinder tube. The adapter body, being a separate shorter component, requires the threading operations, while the cylinder tube only requires the weld seam, simplifying its machining requirements.
Solution Approach 2:
The threading operation is extracted from the cylinder tube and transferred to the adapter body. This removes the complex threading requirement from the long cylinder tube, making its machining simpler while maintaining the secure threaded attachment capability.
3Ease of operation
If threads are produced by shape-cutting operation, then functional threads are created, but matching threads of closure parts and cylinder tube for precise angular positioning becomes difficult
Solution Approach 1:
The adapter body acts as an intermediary that standardizes the threaded interface. By providing a consistent threaded adapter body between the closure part and cylinder tube, precise angular positioning can be achieved without the difficulty of matching threads directly on the cylinder tube.
Solution Approach 2:
The threading parameters are standardized on the adapter body rather than being customized for each cylinder tube. This standardization of thread parameters on the intermediary adapter body facilitates precise angular positioning while simplifying manufacturing.
4Strength
If increased material thickness is provided for thread insertion, then thread strength is sufficient, but material consumption and final weight increase considerably
Solution Approach 1:
The material requirements are segmented between the adapter body and the cylinder tube. The adapter body is designed with sufficient wall thickness to accommodate the threads while the cylinder tube maintains its minimum required thickness for structural integrity, optimizing overall material usage.
Solution Approach 2:
The adapter body serves as a mediator that concentrates the material requirements for threading in a localized component rather than increasing the wall thickness of the entire cylinder tube, thereby reducing overall material consumption while maintaining thread strength.
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
This design reduces material consumption, simplifies machining, allows for precise angular adjustment independent of tightening torque, and maintains reliability and demountability, combining the advantages of screw and weld-type working cylinders.
Implementation Method 1
The end of the cylinder tube is positively connected to the adapter body at one end of the adapter body on the cylinder tube side by means of a circumferential ring weld seam
Data Source
AI summary
A working cylinder has a cylinder tube has closure parts arranged at tube ends. The cylinder tube and the closure parts define a cylinder interior. The cylinder has a coupling section that has one of the closure parts, a cylinder tube end and a hollow adapter body. The closure part has an external thread and the adapter body has an internal thread that define a common threaded section constructed to releasably couple the closure part and the adapter body. The cylinder tube end is connected to the adapter body on a cylinder tube side thereof by a ring weld seam. The weld seam defines a sealing plane sealed with respect to a pressure media. The piston unit defines at least one working chamber inside the cylinder.