Modular Hydrostatic Transaxle Design for Compact Assembly
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing hydrostatic drive systems lack modularity and interchangeability, leading to complex construction and assembly processes, and increased component count, which complicates their integration into compact vehicle or machine applications.
Innovation Solution
A compact hydrostatic transaxle design with modular internal components, including a housing cap and main housing with interchangeable pump and motor mounts, and fluid passages, allowing for simplified construction and reduced component count, utilizing the lost foam method for complex geometry creation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If traditional hydrostatic drive systems are used, then functional requirements are met, but device complexity increases and modularity is reduced
Solution Approach 1:
The hydrostatic transaxle is divided into modular components including a pump assembly, motor assembly, and common housing that can be independently manufactured and assembled. The pump and motor mounts are designed as separate interchangeable components that attach to the common housing, allowing independent replacement and customization of hydraulic components without affecting the entire system.
Solution Approach 2:
The common housing is designed with universal mounting interfaces and fluid passages that can accommodate different pump and motor configurations. The interchangeable mounts allow the same housing to support various hydraulic component combinations, providing multi-functionality and adaptability across different application requirements.
2Ease of manufacture
If modular interchangeable components are implemented, then ease of manufacture improves, but manufacturing precision requirements increase
Solution Approach 1:
Mounting plates and interface components serve as intermediaries between the common housing and the pump/motor assemblies. These intermediary elements absorb and compensate for dimensional variations, providing a standardized interface that simplifies assembly while maintaining the necessary precision through the intermediary mounting components rather than requiring extreme precision across all mating surfaces.
Data Source
AI summary
A hydrostatic transmission assembly includes a first housing member and a housing cap sealed to the first housing member to form a sump wherein a pump and motor are rotatably disposed. A pump mount is located in the sump and engaged to the housing cap. The housing cap also includes a motor mount for an axial piston motor, and hydraulic fluid passages for connecting the pump to the motor. A pocket is located in the housing cap to rotationally support a swash plate for the pump.