Fluid-Filled Damping Assembly Tapered Metal Demolding
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Solution Overview
Problem
Conventional methods for manufacturing fluid-filled cylindrical damping assemblies face efficiency issues in mass production due to difficulties in demolding outer cylindrical metal members, leading to compromised damping characteristics and durability.
Innovation Solution
The method involves forming the outer cylindrical metal member with a tapered cylindrical shape and creating additional escape pathways to manage fluid pressure and prevent partial expansion of the main elastic rubber body, ensuring sufficient extraction-resisting force and maintaining damping characteristics during assembly and fitting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the outer cylindrical metal member is formed with a tapered cylindrical shape to improve demolding capability, then manufacturing efficiency is improved, but fluid pressure increases causing partial expansion of the main elastic rubber body which compromises damping characteristics
Solution Approach 1:
The patent divides the fluid chamber into multiple sealed chambers using partition walls, preventing fluid from escaping into unintended areas during the diameter-reducing operation. This segmentation maintains proper fluid pressure distribution and prevents unwanted expansion of the elastic rubber body while allowing the use of tapered outer cylindrical metal members for efficient demolding.
Solution Approach 2:
The patent changes the physical state management of the fluid by introducing escape pathways that allow controlled fluid movement during assembly. The fluid is allowed to escape through these pathways during the diameter-reducing operation, then the pathways are sealed, trapping the fluid in a controlled state that prevents excessive pressure buildup and rubber body expansion.
2Reliability
If the outer cylindrical metal member is fitted and fixed to the intermediate sleeve with sufficient extraction-resisting force, then connection reliability is improved, but manufacturing complexity increases due to additional engagement structures
Solution Approach 1:
The patent employs asymmetric engagement structures where the inner flange portion and engaging portion are positioned at different axial locations of the outer cylindrical metal member. This asymmetric arrangement provides sufficient extraction-resisting force through strategic positioning rather than uniform reinforcement, simplifying the overall manufacturing process while maintaining connection reliability.
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 approach enhances manufacturing efficiency by improving demolding capabilities and reducing fluid pressure, thereby maintaining the damping characteristics and durability of the fluid-filled cylindrical damping assemblies.
Implementation Method 1
an amount of non-compressible fluid is caused to remain between the outer cylindrical metal member and the shaft member without the escape way
Data Source
AI summary
A method of manufacturing a fluid-filled cylindrical damping assembly having sufficiently large extraction-resisting force in an axial direction of a metallic shaped product and an intermediate sleeve by the process following. There is provided a sealing rubber layer at an inner circumferential surface of the metallic shaped product having a tapered cylindrical shape where the inner flange portion is provided at an end portion of a small-diameter side. At least one concave groove is formed at an inside surface of an inner flange portion The metallic shaped product is inserted on an outer circumferential surface of an intermediate molded-body in a non-compressible fluid, and is diameter-reduced so as to be fitted and fixed. A large-diameter side end portion of the metallic shaped product is radially inwardly bent to form an engaging portion, and the engaging portion is engaged with a large-diameter side end portion of the intermediate sleeve.