Track Driven Sub-Base Assembly for Zero-Turn Mower
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Solution Overview
Problem
Zero-turn mowers face challenges in maneuverability and attachment operation due to limitations in their turning radius and hydraulic power distribution, particularly when operating on soft ground or requiring additional attachments like back-hoes or augers.
Innovation Solution
A track-driven sub-base assembly with a universal hub group, hydraulic pump, and utility arms that allow for adjustable track tension and hydraulic operation, enabling the mower to traverse soft ground and support various attachments by distributing weight effectively and providing hydraulic power.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If zero-turn mowers use traditional wheeled design, then they achieve simple structure and ease of manufacture, but they suffer from limited maneuverability and inability to operate on soft ground
Solution Approach 1:
The mower is divided into distinct modular components: a track-driven sub-base assembly and a cab assembly. The sub-base contains the engine, transmission, and hydraulic systems, while the cab contains the operator interface. This segmentation allows independent optimization of each module and facilitates attachment of various implements to the sub-base.
Solution Approach 2:
The track-driven sub-base assembly is designed as a universal platform that can support multiple different attachments and implements through standardized mounting points and hydraulic connections. The same sub-base can operate as a standalone mower or be configured with back-hoes, augers, or other attachments, making it multi-functional.
2Adaptability or versatility
If zero-turn mowers add hydraulic systems for attachments, then they gain attachment operation capability, but they experience hydraulic power distribution limitations
Solution Approach 1:
The sub-base assembly incorporates a hydraulic system with a hydraulic pump, hydraulic oil reservoir, and hydraulic lines that distribute pressurized hydraulic oil to utility arms and attachment implements. This hydraulic system provides sufficient power for operating heavy attachments like back-hoes and augers, overcoming the power distribution limitations of traditional zero-turn mowers.
3Reliability
If zero-turn mowers operate on soft ground, then they require enhanced traction and weight distribution, but their wheeled design causes them to sink or lose maneuverability
Solution Approach 1:
The design changes the contact parameters between the mower and ground by replacing wheeled contact with continuous track contact. This increases the surface area in contact with the ground, distributing the mower's weight over a larger area to prevent sinking into soft ground while maintaining maneuverability through the tracked propulsion system.
4Adaptability or versatility
If zero-turn mowers increase turning radius capability, then they improve maneuverability, but they lose the zero-turn capability that defines their operation
Solution Approach 1:
The track-driven sub-base assembly provides dynamic turning capability where the tracks can operate at different speeds independently, enabling true zero-turn capability. The hydraulic system allows variable speed control of the tracks, providing both zero-turn capability for tight spaces and larger turning radii when needed, adapting to different operational requirements without sacrificing productivity.
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
Enhances maneuverability and operational stability on soft ground while enabling the use of attachments like back-hoes and augers by distributing weight and providing hydraulic power, addressing the limitations of zero-turn mowers in turning radius and attachment operation.
Implementation Method 1
A hydraulic pump is coupled to the undercarriage frame and is configured to operate the one or more utility arms
Implementation Method 2
an undercarriage that is configured to hold hydraulic oil
Data Source
AI summary
An assembly that is configured to receive a cab assembly is described. The assembly includes an undercarriage that is configured to hold hydraulic oil. One or more utility arms are coupled to the undercarriage frame for lifting and lowering attachments coupled to the one or more utility arms. A hydraulic pump is coupled to the undercarriage frame and is configured to operate the one or more utility arms.