Modular Track Assembly for Walk-Behind Snow Removal Equipment

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Solution Overview

Problem

Existing walk-behind snow removal equipment lacks flexibility in mobility options, as consumers cannot easily change or upgrade the mobility assembly without purchasing a new machine, limiting configuration choices and serviceability.

Innovation Solution

A modular mobility assembly system that allows for the removable and replaceable mobility assemblies, enabling consumers to switch between different types of mobility assemblies, such as wheels and tracks, using an adaptation assembly that facilitates coupling with the device's chassis and drive assembly.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If a fixed mobility assembly is used in snow removal equipment, then the structural simplicity is maintained, but the adaptability and consumer choice are limited

Engineering Contradiction:
Improvemobility assembly optionsVSAvoidmodular system complexity
Core Design Contradiction:
Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The mobility assembly is divided into separate modular components including a mobility assembly frame, drivable components (wheels or tracks), and an adaptation assembly. This segmentation allows consumers to choose different mobility types while maintaining a standardized interface with the chassis and drive assembly, resolving the contradiction between adaptability and complexity.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The adaptation assembly serves as a universal interface that can accommodate different types of mobility assemblies (wheeled or tracked) while connecting to the same chassis and drive assembly. This multi-functionality enables a single base platform to support multiple mobility configurations, improving adaptability without proportionally increasing overall system complexity.

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

2Ease of repair

If the mobility assembly is permanently fixed, then the structural stability is maintained, but the ease of repair and serviceability are reduced

Engineering Contradiction:
ImproveserviceabilityVSAvoidstructural stability
Core Design Contradiction:
Ease of repairVSStability of the object's composition

Solution Approach 1:

The mobility assembly is extracted from the permanent fixed structure and made removable through the adaptation assembly interface. This allows the mobility components to be easily removed and replaced for repair or upgrade purposes, while the base chassis and drive assembly remain stable and intact, resolving the contradiction between serviceability and structural stability.

Inventive Principle:
Principle #2Taking out (Extraction)

3Loss of time

If consumers must buy a new machine to change mobility type, then the manufacturing simplicity is maintained, but the loss of time and additional cost are increased

Engineering Contradiction:
Improvetime to change mobilityVSAvoidmanufacturing simplicity
Core Design Contradiction:
Loss of timeVSEase of manufacture

Solution Approach 1:

The adaptation assembly is pre-configured with standardized mounting interfaces and connection points during manufacturing. This preliminary preparation of the chassis and drive assembly allows for rapid interchange of mobility assemblies without requiring complex field modifications or remanufacturing, reducing the time and effort needed to change mobility types while maintaining manufacturing efficiency.

Inventive Principle:
Principle #10Preliminary action

Data Source

PatentUS11254376B2Modular track assembly
Publication Date: 2022.02.22 HUSQVARNA AB
  • US11254376B2 patent drawing
  • US11254376B2 patent drawing
  • US11254376B2 patent drawing

AI summary

A replacement mobility assembly for a walk-behind, powered device (10) may include first and second drivable components, a mobility assembly frame, and an adaptation assembly. The powered device may be provided with an original mobility assembly (40) that is to be removed from coupling with a drive assembly and a chassis (15) of the powered device prior to installation of the replacement mobility assembly. The first and second drivable components may each be of a different type than corresponding drivable components of the original mobility assembly. The first and second drivable components may be operably coupled to the mobility assembly frame. The adaptation assembly may be configured to enable the mobility assembly frame to be operably coupled to the chassis and the first and second drivable components to be operably coupled to the drive assembly.