Hydrostatic Piston Retaining Segment with Integrated Stop Surface
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Solution Overview
Problem
Existing hold-down segments for hydrostatic piston engines are limited in functionality, requiring additional components for high-pressure adjustment and swivel angle limitation, which increases installation space and does not effectively manage the retraction plate during suction strokes.
Innovation Solution
A hold-down segment with a receptacle for an actuating element, a stop surface to limit pivoting cradle movement, and a hold-down surface extending along a circular arc section, made from tempered steel and nitrocarburized and oxidized for enhanced strength and wear resistance, integrated with a magnet for pivoting angle detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If hold-down segments are made from brass or bronze to ensure emergency running properties, then reliability is improved, but device complexity increases and installation space increases
Solution Approach 1:
The patent combines multiple previously separate functions into a single hold-down segment component. The soft material (brass or bronze) is integrated directly into the hold-down segment body, eliminating the need for separate emergency running property components. This merging reduces overall device complexity while maintaining reliability.
Solution Approach 2:
The hold-down segment is designed to perform multiple functions simultaneously: it provides normal operational holding, ensures emergency running properties through the soft material, and integrates with the actuating device receptacle. This multi-functionality approach reduces the number of separate components needed, thereby reducing installation space and device complexity.
2Adaptability or versatility
If additional functions are provided at other points on the axial piston machine, then functionality is improved, but installation space increases
Solution Approach 1:
The patent merges the soft material emergency running function, the actuating device receptacle, and the hold-down function into a single integrated hold-down segment. This consolidation eliminates the need for separate components distributed throughout the axial piston machine, thereby reducing installation space while maintaining all necessary functionalities.
3Force
If the hold-down segment is subjected to considerable stress at the stop surface, then force transmission is improved, but the material requirements increase
Solution Approach 1:
The patent applies local quality by using a soft material (brass or bronze) specifically at the stop surface where considerable stress occurs during pivoting cradle operation. This localized soft material provides appropriate stress distribution and force transmission characteristics without requiring the entire hold-down segment to be made of high-strength material, thus optimizing material usage while maintaining force transmission capability.
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 integrates multiple functions into a single component, ensuring reliable holding and force transmission, reducing friction, and improving the operational efficiency and lifespan of the axial piston machine by providing effective support during suction strokes and maintaining low friction.
Implementation Method 1
made from tempered steel and nitrocarburized and oxidized for enhanced strength and wear resistance
Implementation Method 2
made from tempered steel and nitrocarburized and oxidized for enhanced strength and wear resistance
Implementation Method 3
integrated with a magnet for pivoting angle detection
Data Source
AI summary
The invention relates to a retaining segment (17, 38) for retaining a back-up plate of a hydrostatic piston machine. The retaining segment (17, 38) has a recess (20) for an actuating element of an adjusting device and a retaining surface that extends along an arc section (48). A stop surface (26, 40) is formed on the retaining segment (17, 38).