Shock Absorber Valve Assembly Without Pin Machining
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Solution Overview
Problem
Conventional shock absorbers require machining of a mounting member to create a tool engagement portion, leading to increased man-hours for fabrication.
Innovation Solution
The shock absorber design includes a damping force generation mechanism with a pin member that has an introduction orifice leading to a back-pressure chamber, allowing for fastening of the main valve, seat member, and pilot casing using a nut rotated relative to the pin member, eliminating the need for machining a tool engagement portion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a mounting member is machined to provide a tool engagement portion for rotating the mounting shaft, then the shock absorber can be assembled, but the fabrication man-hours increase
Solution Approach 1:
The invention divides the mounting member into separate functional components: the pin member (mounting shaft) and the fastening member (nut), which are assembled together rather than being integrated through machining. This segmentation eliminates the need for complex machining of the mounting member while maintaining the required functionality.
Solution Approach 2:
The invention introduces a fastening member (nut) as an intermediary component that connects the pin member to the valve housing. This intermediary component simplifies the manufacturing process by replacing the need for machined tool engagement portions, as the nut provides the necessary fastening function without requiring complex machining operations.
2Loss of time
If the pin member is used with a fastening member instead of a machined mounting member, then fabrication man-hours are reduced, but the structural complexity increases
Solution Approach 1:
The mounting function is segmented into discrete components (pin member and fastening member) that can be manufactured using simpler processes and assembled together. This segmentation reduces the complexity of individual components while maintaining the overall functionality through standardized assembly.
Solution Approach 2:
The pin member serves multiple functions: it acts as both the mounting shaft and the structural connector, while the fastening member provides both the connection and the tool engagement interface. This multi-functionality reduces the need for separate specialized components, thereby reducing overall device complexity despite the additional assembly steps.
Data Source
AI summary
A pin portion in which an introduction orifice leading to a back-pressure chamber is formed is disposed along inner peripheries of a main body, a main valve, and a pilot casing. A nut disposed on the pin portion is rotated relative to the pin portion to fasten the main body, the main valve, and the pilot casing together. This eliminates the necessity of machining a tool engagement portion in the pin portion and represses an increase in man-hours.