Hydraulic Pump Element Inlet Valve Cap High-Pressure Seal Integration
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Solution Overview
Problem
Existing pump elements for hydraulic vehicle brake systems require complex installation processes involving multiple assembly belts and pressure bonds, making them difficult to install and increasing production costs.
Innovation Solution
Integrating the high-pressure seal into the inlet valve cap and using a separate, injection-molded plastic valve seat element that is connected to the pump piston via nonpositive engagement, allowing for axial installation without separate assembly belts and pressure bonds, and utilizing centering elements for alignment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the high-pressure seal is embodied as a separate component from the inlet valve cap, then the assembly can be manufactured separately, but the installation process becomes complex requiring multiple assembly belts and pressure bonds
Solution Approach 1:
The high-pressure seal is integrated into the inlet valve cap as a single piece component, eliminating the need for separate assembly of the seal and valve cap. This merging reduces the number of assembly steps and eliminates the need for multiple assembly belts and pressure bonds during installation, directly resolving the contradiction between separate manufacturing and installation complexity
2Ease of manufacture
If the pump piston is not connected to the valve seat element, then the components can be assembled separately, but the pump element becomes unstable and components may loosen during assembly
Solution Approach 1:
The pump piston is preliminarily connected to the valve seat element through nonpositive engagement before final assembly. This preliminary connection ensures stability during the assembly process and prevents unintended loosening of components, while still allowing for separate manufacturing of the piston and valve seat element
3Device complexity
If centering elements are not provided, then the structure is simpler, but the components cannot be aligned properly during axial installation
Solution Approach 1:
Centering elements are provided on the high-pressure sealing portion and/or valve seat element to facilitate proper alignment of components during axial installation. These centering elements act as intermediaries that guide the components into correct positions relative to each other, ensuring accurate alignment without complicating the overall structure
4Ease of manufacture
If two separate assemblies are used (piston assembly and outlet valve assembly), then the components can be manufactured independently, but the installation requires multiple assembly belts and is time-consuming
Solution Approach 1:
The pump element is designed as a single integrated assembly rather than two separate assemblies (piston assembly and outlet valve assembly). This merging allows the entire pump element to be installed in one piece using forward installation, eliminating the need for multiple assembly belts and significantly increasing installation speed and productivity
Data Source
AI summary
The invention relates to a pump element for installation in a pump bore of a hydraulic block, which includes a pump plunger, a restoring spring for the pump plunger, and an inlet valve having an inlet valve cover, in which a closing spring and a closing body are arranged. According to the invention, the inlet valve cover has a high pressure sealing section, which rests against the valve seat element in the axial direction with spring force support provided by the restoring spring. The valve seat element is positively connected to the pump plunger at least before installation of the pump element in the pump bore. Centering elements are provided for centering the inlet valve cover relative to the valve seat element. The invention further relates to a hydraulic block and to an installation method.