Transaxle With Adjustable Output Shafts for Zero-Turn Vehicle Configurations

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Solution Overview

Problem

Existing transaxles for zero turn vehicles lack adaptability to various configurations, limiting their versatility and efficiency in different applications.

Innovation Solution

The development of transaxles with adaptable designs, including hydrostatic and electronic control systems, that can be integrated into various zero turn vehicle configurations, allowing for adjustable positioning and improved steering mechanisms.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If transaxles are designed for specific vehicle configurations, then they achieve optimized performance for that configuration, but they lack adaptability to other configurations

Engineering Contradiction:
Improveperformance optimizationVSAvoidconfiguration adaptability
Core Design Contradiction:
ReliabilityVSAdaptability or versatility

Solution Approach 1:

The transaxle is designed with universal mounting provisions including multiple mounting plate configurations, adjustable output shaft positions, and standardized interface elements that enable the same transaxle unit to be adapted to various zero-turn vehicle configurations without requiring configuration-specific design variants

Inventive Principle:
Principle #6Universality (Multi-functionality)

Solution Approach 2:

The transaxle incorporates adjustable components such as repositionable output shafts, configurable mounting plates with multiple attachment points, and adaptable control linkages that allow the system to be dynamically reconfigured for different vehicle applications while maintaining optimized performance characteristics

Inventive Principle:
Principle #15Dynamics

2Stability of the object's composition

If transaxles are designed with fixed positioning, then they achieve structural stability, but they lack adjustability for different vehicle designs

Engineering Contradiction:
Improvestructural stabilityVSAvoidpositioning adjustability
Core Design Contradiction:
Stability of the object's compositionVSAdaptability or versatility

Solution Approach 1:

The transaxle assembly is divided into modular components including separable mounting plates, independently adjustable output shaft assemblies, and discrete control linkage sections that can be configured and repositioned while maintaining overall structural integrity and stability

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

Fixed structural elements are combined with adjustable components featuring multiple positioning options, such as mounting plates with predetermined attachment points and output shafts with repositionable bearings, enabling the system to achieve both structural stability and positioning adaptability

Inventive Principle:
Principle #15Dynamics

3Volume of moving object

If transaxles are made compact, then they save space in the vehicle, but they may limit access for maintenance and adjustment

Engineering Contradiction:
Improvetransaxle compactnessVSAvoidmaintenance accessibility
Core Design Contradiction:
Volume of moving objectVSEase of repair

Solution Approach 1:

The compact transaxle is designed with segmented architecture where major components such as the mounting plates, output shaft assemblies, and control linkages can be independently accessed and removed, allowing maintenance personnel to service internal components without requiring complete disassembly of the compact housing

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

Critical maintenance components including output shaft seals, bearing assemblies, and control linkage elements are designed to be extractable through accessible service ports or removable panels on the compact transaxle housing, enabling repair operations without compromising the overall compact form factor

Inventive Principle:
Principle #2Taking out (Extraction)

Data Source

PatentUS10414273B1Transaxle for zero-turn vehicle
Publication Date: 2019.09.17 HYDRO GEAR LP
  • US10414273B1 patent drawing
  • US10414273B1 patent drawing
  • US10414273B1 patent drawing

AI summary

A zero turn vehicle is described. The vehicle comprises a frame, a prime mover, a transaxle, first and second gear boxes, first and second driven wheels, an operator foot platform, and an expansion tank. The transaxle is aft of the prime mover and has opposing first and second output shafts. The first and second gearboxes are respectively driven by and pivotable about the first and second output shafts. The first and second gear boxes respectively have first and second output axles aft of the first and second output shafts. The first and second driven wheels are respectively engaged with the first and second output axles. The operator foot platform is between the first and second gear boxes and aft of the transaxle. The expansion tank is between the transaxle and the operator foot platform and between the first and second gear boxes.