Piston Pump Outlet Valve Ball Biasing Member
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Solution Overview
Problem
Conventional piston pumps for vehicle brake systems have complex manufacturing processes and increased costs due to additional forming processes required for hydraulic pressure discharge passages, and they often involve a large number of parts and complex structures.
Innovation Solution
A piston pump design featuring a ball biasing member that forms an oil discharge passage and provides elastic support, eliminating the need for separate components and simplifying the structure by using a sleeve housing and outlet valve cover with a gap between them, where the ball biasing member's legs are equidistantly disposed to create an oil discharge passage and elastic support mechanism.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a channel is formed in the outlet valve cover to serve as a discharge passage, then the hydraulic pressure can be discharged, but an additional forming process is required which complicates the manufacturing process and increases manufacturing cost
Solution Approach 1:
The patent merges the discharge passage function with the outlet valve cover by forming a groove directly on the valve seat of the sleeve housing. This integration eliminates the need for separate discharge passages in the outlet valve cover, reducing the number of forming processes required and simplifying the overall manufacturing process while maintaining the necessary hydraulic pressure discharge capability
Solution Approach 2:
The valve seat of the sleeve housing is designed to serve multiple functions: it provides the sealing surface for the outlet valve and simultaneously incorporates the discharge passage through a formed groove. This multi-functionality reduces the need for additional components and forming processes, directly addressing the manufacturing complexity issue
2Ease of manufacture
If an orifice plate with hydraulic oil passage is interposed between sleeve housing and outlet valve cover, then the discharge passage is provided, but the number of parts increases and the structure becomes complicated
Solution Approach 1:
The patent eliminates the need for a separate orifice plate by integrating the discharge passage function directly into the valve seat of the sleeve housing through a formed groove. This merging of functions reduces the total number of parts in the outlet valve assembly while maintaining the hydraulic oil discharge capability, directly resolving the issue of increased part quantity and structural complexity
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 solution reduces the number of parts, simplifies the manufacturing process, and enhances productability by integrating the oil discharge passage and elastic support functions within the ball biasing member, thereby reducing manufacturing complexity and costs.
Implementation Method 1
a ball biasing member (62) having a function of forming an oil discharge passage (64) as well as a function of elastically supporting the ball (61)
Data Source
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AI summary
An outlet valve which is formed between a sleeve housing and an outlet valve cover of a piston pump of a vehicle includes: a ball which is movably disposed between the sleeve housing and the outlet valve cover and selectively opens/closes a discharge hole which is formed in the sleeve housing depending on a movement thereof; and a ball biasing member which exerts a force to urge the ball to move a position where the discharge hole is closed. The ball biasing member is formed such that an oil discharge passage for discharging an oil discharged via the discharge hole to an outside is formed between the sleeve housing and the outlet valve cover.