Sprocket Idler Common Wheel Segmented Design

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Solution Overview

Problem

Current sprocket and idler wheels in the earth moving, construction, and mining industries are costly to manufacture and store due to complex geometry and high heat treatment requirements, with existing solutions not effectively reducing these costs for both components simultaneously.

Innovation Solution

A wheel kit comprising a common wheel member with interchangeable annularly configured attachments, such as toothed and idler flange attachments, which can be press-fit or welded, allowing for separate material selection and heat treatment, reducing the need for induction hardening and lowering production costs.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If sprocket and idler wheels are manufactured with complex geometry (teeth or flange) to perform their respective functions, then the functional performance is improved, but the manufacturing cost and heat treatment requirements increase

Engineering Contradiction:
Improvefunctional performanceVSAvoidmanufacturing cost
Core Design Contradiction:
ReliabilityVSEase of manufacture

Solution Approach 1:

The sprocket wheel is divided into two separate components: a common wheel member and a detachable tooth member. The tooth member can be attached to the wheel member to create a sprocket, or removed to leave a simple idler wheel. This segmentation allows the same base component to serve dual functions, reducing the need for separate manufacturing processes and heat treatment for different wheel types.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The common wheel member is designed as a universal base component that can function as either a sprocket wheel or an idler wheel depending on whether the tooth member is attached. This multi-functionality eliminates the need to manufacture separate specialized wheels for each function, thereby reducing manufacturing costs and inventory requirements.

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

2Adaptability or versatility

If separate sprocket and idler wheels are manufactured to meet different functional requirements, then the functional versatility is improved, but the manufacturing and storage costs increase

Engineering Contradiction:
Improvefunctional versatilityVSAvoidinventory cost
Core Design Contradiction:
Adaptability or versatilityVSQuantity of substance

Solution Approach 1:

The common wheel member serves as a universal platform that can be configured for different functions by attaching or removing the tooth member. This allows a single base component to replace multiple specialized components, reducing inventory requirements and storage costs while maintaining functional versatility.

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

Solution Approach 2:

The configuration of the wheel assembly is made dynamic and changeable rather than fixed. The tooth member can be attached or detached based on operational requirements, allowing the system to adapt its function rather than requiring separate fixed-configuration components for each function.

Inventive Principle:
Principle #15Dynamics

3Ease of manufacture

If traditional attachment methods (cylindrical pins) are used to attach sprocket teeth members to wheels, then the assembly is achieved, but the manufacturing time and cost increase

Engineering Contradiction:
Improveassembly processVSAvoidassembly time
Core Design Contradiction:
Ease of manufactureVSLoss of time

Solution Approach 1:

The attachment system is segmented into modular components (wheel member, tooth member, and attachment mechanism) that can be independently manufactured and then quickly assembled. This modular segmentation enables faster assembly compared to traditional methods requiring precise alignment and complex fastening procedures.

Inventive Principle:
Principle #1Segmentation

Data Source

PatentEP3873796B1Sprocket and idler sharing common wheel
Publication Date: 2024.01.03 CATERPILLAR INC
  • EP3873796B1 patent drawingFigure 1~3
  • EP3873796B1 patent drawingFigure 4
  • EP3873796B1 patent drawingFigure 5

AI summary

A sprocket and an idler sharing a common wheel member (102) are manufactured by a method (300) that includes providing a common wheel member (302), providing an idler flange annular attachment (304), and providing a toothed annular attachment (306).