Shock Absorber Partition Member Assembly via Projection Fit
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Solution Overview
Problem
The existing shock absorbers with partition members in reservoirs face challenges in productivity and assembleability due to complex manufacturing processes and the need for securing members like toothed washers.
Innovation Solution
A shock absorber design featuring a flexible or pliable resin or rubber partition member with a fitting hole and projection, assembled by abutting the projection against the intermediate tube's reduced-diameter portion and fitting the hole to the connecting pipe, eliminating the need for securing members and enhancing assembly precision.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a rubber partition is vulcanization-bonded to a metallic plate part, then the partition member achieves sufficient strength and sealing, but the manufacturing complexity and assembly difficulty increase
Solution Approach 1:
The invention extracts the metallic plate part from the partition member structure, using only a rubber partition member without any metal components. This eliminates the need for vulcanization-bonding processes and reduces manufacturing complexity while maintaining sufficient strength through the rubber material's inherent properties and the partition member's geometric design
Solution Approach 2:
The invention changes the material parameter from a composite rubber-metal structure to a pure rubber structure. By utilizing the elastomeric properties of rubber and designing the partition member with appropriate thickness and geometry, the required strength is achieved without complex bonding processes
2Strength
If a rubber partition bonded to a metallic plate is used, then the partition provides adequate structural support, but the assembly process becomes more difficult and time-consuming
Solution Approach 1:
By removing the metallic plate component entirely and using only a rubber partition member, the assembly process is simplified to a single-component installation. The rubber partition can be directly fitted into the reservoir without requiring bonding operations, significantly improving assembly productivity
Solution Approach 2:
The rubber partition member is designed to self-secure within the reservoir through its elastic properties and geometric configuration. The partition automatically positions itself and maintains structural support without requiring external bonding agents or complex assembly procedures
3Reliability
If securing members like toothed washers are used to fix the partition, then the partition is securely fixed, but the number of parts and assembly steps increase
Solution Approach 1:
The invention removes all securing members such as toothed washers and fasteners from the partition fixation system. The rubber partition member is designed to be self-retaining through its elastic deformation and geometric fit within the reservoir, eliminating the need for additional securing components and reducing the total part count
Solution Approach 2:
The functions of structural support, sealing, and fixation are merged into a single rubber partition member. The partition's elastic properties and geometric design simultaneously provide all three functions, eliminating the need for separate securing members and simplifying the overall structure
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 improves productivity and assembleability by simplifying the manufacturing process, reducing costs, and preventing aeration and cavitation, while ensuring stable damping forces through effective hydraulic fluid regulation.
Implementation Method 1
a projection projecting in a direction reverse to a direction in which the partition projects so that the projection is abutted against the reduced-diameter portion or one end of the intermediate tube
Implementation Method 2
The partition member has a fitting hole to be fitted to the connecting pipe with an interference
Implementation Method 3
a partition member provided in the reservoir and having a partition regulating a flow of hydraulic fluid from the opening to the reservoir in the shock absorber as installed between the two members
Implementation Method 4
an annular groove formed in the reduced-diameter portion to accommodate a seal member sealing between the each end of the intermediate tube and the cylinder
Data Source
AI summary
A baffle plate (41, partition member) is manufactured by being integrally formed of a single material including flexible or pliable NBR (nitrile rubber), and a projection (51) formed on an abutment surface (42B) of the baffle plate (41) is fitted into a recess (52) in a reduced-diameter portion (36) of an intermediate tube (20). Thus, when the intermediate tube (20) fitted with the baffle plate (41) is assembled into an outer tube, the sheet-shaped baffle plate (41) can be prevented from rotating about a connecting pipe (23), and it is possible to improve the productivity and assembleability of the shock absorber.