Snap Ring Fluid Control Valve Structure for Secure Oil Discharge
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Solution Overview
Problem
Conventional fluid control valve units face issues with structural complexity, high part counts, reliability concerns, and inefficient hydraulic oil discharge due to the risk of components coming off during impact or over time.
Innovation Solution
A simplified fluid control valve unit configuration that includes a sleeve with a discharge passage, a spool with valve portions, and a snap ring with a notch and holes for tool insertion, which restricts the valve unit from falling off and facilitates smooth hydraulic oil discharge.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the engagement member and filter member are fitted to the inner wall surface of the outer sleeve, then the spool is fixed and hydraulic oil can be discharged, but the components may come off due to impact or changes over time
Solution Approach 1:
The engagement member is integrated with the filter member to form a single unified component. This merging eliminates the risk of separate components coming off during operation while simplifying the overall structure and reducing the number of parts that need to be assembled and maintained.
Solution Approach 2:
The integrated engagement member-filter member assembly serves multiple functions simultaneously: it filters hydraulic oil, engages with the outer sleeve to prevent component detachment, and provides structural support. This multi-functionality reduces the need for separate dedicated components.
2Reliability
If the engagement member is fitted to fix the inner sleeve, then the spool is restricted from coming off, but the mounting state is unclear and hydraulic oil discharge may be affected
Solution Approach 1:
The integrated member is designed with distinct functional zones: a filter portion for hydraulic oil filtration and an engagement portion with protrusions for securing the inner sleeve. This segmentation ensures that the discharge passage remains clear and unobstructed while maintaining reliable component retention.
Solution Approach 2:
The engagement member features localized engagement protrusions at specific positions that provide secure retention without interfering with the hydraulic oil discharge path. The filter portion is positioned and shaped to optimize filtration while maintaining clear flow channels.
3Adaptability or versatility
If multiple separate components are used for fixing and filtering, then each component can be optimized for its specific function, but the number of parts increases and assembly complexity increases
Solution Approach 1:
The engagement member and filter member are combined into a single integrated component that performs both functions simultaneously. This merging reduces the total number of parts while maintaining the functional optimization achieved through careful design of the integrated structure.
Data Source
AI summary
A fluid control valve unit includes: a fluid control valve including a sleeve in a bottomed cylindrical shape defining an axis, and a spool slidably accommodated in the sleeve in a direction of the axis; a cylindrical passage member including an inner peripheral surface to which the sleeve is fitted, a receiving part for receiving an end of the sleeve in the direction of the axis, and an annular groove recessed from the inner peripheral surface; and a snap ring including a notch with a predetermined gap and fitted in the annular groove to be capable of restricting the fluid control valve accommodated in the passage member from falling off in the direction of the axis and to be capable of discharging fluid flowing through a discharge passage formed in the passage member.