Hydrostatic Transmission Thrust Bearing Retainer Assembly
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Solution Overview
Problem
Hydrostatic transmissions in vehicles and machines face challenges with excessive friction and wear in thrust bearing assemblies due to improper fit and alignment of retainer components, leading to reduced efficiency and lifespan.
Innovation Solution
A thrust bearing assembly with removably interconnected retainer components, including a first and second retainer with alignment slots and tabs, and locking tangs, which securely capture a steel thrust bearing, ensuring proper fit and rotation, reducing friction and wear.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If retainer components are used to secure the thrust bearing, then the thrust bearing is properly positioned and supported, but friction and wear increase due to improper fit and alignment
Solution Approach 1:
The retainer is divided into multiple separable components (first retainer component, second retainer component, third retainer component) that can be independently positioned and assembled. This segmentation allows each component to be precisely fitted to specific features of the thrust bearing and housing, ensuring proper alignment while providing secure support, thereby reducing friction and wear.
2Ease of operation
If the thrust bearing assembly is made as a single integrated component, then alignment is simplified, but ease of repair and replacement deteriorates
Solution Approach 1:
The retainer assembly is segmented into multiple components that can be separated for maintenance. The first retainer component remains in the housing, while the second and third retainer components can be removed along with the thrust bearing. This segmentation enables easy replacement of the thrust bearing without requiring disassembly of the entire retainer assembly, maintaining alignment simplicity while improving repairability.
Solution Approach 2:
The thrust bearing and its associated retainer components (second and third retainer components) can be extracted as a separate assembly from the housing. The locking feature engages with the housing to secure this extracted assembly during operation, but allows for easy removal when maintenance is required, facilitating straightforward thrust bearing replacement.
3Stability of the object's composition
If the retainer components are permanently fixed, then structural stability is improved, but adaptability for maintenance and adjustment deteriorates
Solution Approach 1:
The retainer components are designed with preliminary positioning features (engagement features, alignment features) that automatically guide proper assembly and ensure stable positioning when installed. The locking feature provides preliminary securing action during operation, while the separable design maintains adaptability for maintenance by allowing components to be removed and reinstalled as needed.
Data Source
AI summary
A thrust bearing assembly is provided for the pistons of a hydrostatic drive motor. The thrust bearing assembly includes first and second retainer components removably interconnected to form a retainer assembly, a thrust bearing captured between and encompassed by the first and second retainer components, and locking tangs extending outward from the first and second retainer components. Corresponding catches are formed on the internal surface of the housing to engage the locking tangs when the thrust bearing assembly is installed in the housing.