Piston Pump Separation Prevention via Retaining Ring
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Solution Overview
Problem
Conventional piston pumps for vehicle brake systems require complex structures and high-strength oil filters to prevent piston separation, complicating assembly and maintenance.
Innovation Solution
A piston pump design featuring a sleeve housing with a discharge hole, a reciprocally movable piston with an inlet flow passage, an inlet and outlet valve system, and a sealing member with a separation prevention protrusion that blocks the piston to prevent separation, supported by a return spring and an oil filter to maintain assembly without additional members.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a blocking member is formed on the oil filter to prevent piston separation, then the piston can be prevented from separating, but the oil filter structure becomes complicated and requires high strength at the blocking member portion
Solution Approach 1:
The invention extracts the separation prevention function from the oil filter by introducing a dedicated blocking member (retaining ring) that can be independently installed on the piston. This allows the oil filter to maintain its original simple structure while the piston gets the necessary blocking feature through the separately installed retaining ring.
Solution Approach 2:
The invention segments the separation prevention function into a separate component (retaining ring) rather than integrating it into the oil filter. The retaining ring is installed independently on the piston, allowing the oil filter structure to remain simple while still achieving reliable piston separation prevention.
2Strength
If the oil filter is designed with high strength to support the blocking member, then the blocking member can be effectively formed, but the manufacturing complexity and material requirements increase
Solution Approach 1:
The invention extracts the high-strength blocking function from the oil filter and places it on a separate retaining ring component. The retaining ring can be manufactured with the necessary strength independently, while the oil filter itself maintains its original manufacturing simplicity and material requirements.
3Stability of the object's composition
If additional members are added to maintain the assembled state of piston and sleeve housing, then the assembled state can be maintained, but the device complexity increases
Solution Approach 1:
The invention merges the separation prevention function with the existing piston structure by installing the retaining ring directly on the piston. This integration allows the piston itself to maintain the assembled state without requiring additional separate members, thereby maintaining stability while avoiding increased complexity.
Solution Approach 2:
The piston is made self-sufficient for maintaining the assembled state by equipping it with its own retaining ring. The piston independently prevents its own separation from the sleeve housing without requiring external members or complex additional mechanisms.
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
The design simplifies the mechanism for maintaining the assembled state of the piston and sleeve housing, enhancing sealing efficiency and reducing structural complexity while preventing piston separation effectively.
Implementation Method 1
suction and discharging of hydraulic oil are carried out by a reciprocal movement of a piston caused by the rotation of an eccentric spindle and an elastic restoring force of an elastic member
Implementation Method 2
an inlet valve and an outlet valve for suction and discharging of hydraulic pressure in response to a reciprocal movement of the piston
Data Source
AI summary
A piston pump includes: a sleeve housing which is provided with a discharge hole and defines a bore; a piston which has an inlet flow passage for drawing oil into the bore and is reciprocally movably inserted into the bore; an inlet valve which is configured to open/close the inlet flow passage; an outlet valve cover which is coupled to the sleeve housing to surround a portion at which the discharge hole is formed; an outlet valve which is configured to open/close the discharge hole; and a sealing member which is interposed between the sleeve housing and the piston to provide a sealing therebetween. The sealing member is provided with a separation prevention protrusion against which the piston is blocked to prevent a separation of the piston.