Group 11 - Dual Stage Snow Thrower (Gasoline Powered)

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Contents

Product Dissection and Analysis of the Toro CCR-2000 Snow Thrower

Abstract

Our group took apart, analyzed, and reassembled the CCR-2000. The goal was to examine the critical systems and components of the machine, and the decisions involved in the manufacturing of the blower.

We split the project into four steps: Planning, Dissection, Analysis, and Reconstruction. The steps are laid out below

Sub-Pages

Gate 1: Basic information regarding group members, the Toro CCR-2000 Snow Blower, developmental history, and the plan for dissection.

Gate 2: A report detailing our dissection process and analysis of the subsystems present in the Snow Blower.

Gate 3: Cataloging of parts and analysis of subsystems and manufacturing decisions.

Gate 4: The process of reassembly and a presentation of possible design improvements to the machine.

Gate 5: The project management delivary and product archaeology

Executive Summary

Throughout the duration of the Fall 2012 semester, this report has been constructed to describe the process of dissecting, analyzing, and reassembling the Dual Stage Snow Thrower (Gasoline Powered). The project was split into five Gates to separate the process into related objectives. Throughout the different gates we learned the benefits of group management and effective communication, while simultaneously increasing our mechanical knowledge of the drill, learning how it functions, and discovering ways to improve its design.

Gate 1: Project Planning – During the project planning phase, a project management proposal was drafted to assess our team’s strengths and weaknesses and to create formal procedures for handling team issues and conflicts that might arise.we assessed our team, established roles, researched our product, and documented an assessment of our product before dissecting it, to make predictions of what we would learn in future gates. We also made accurate predictions of ease of assembly.An initial dissection procedure was created by studying the visible components about what interior components might lie beneath the snow-blower casing based on our initial research and understanding of two-cycle gas engines. The snow-blower’s usage and complexity were studied in detail and a product alternative profile was created to demonstrate some other options that achieve the same product function of snow removal.

Gate 2: Product Dissection – In the product dissection phase, the snow-blower was dismantled into individual components. The disassembly process was thoroughly documented and each step was assigned a difficulty rating.It has been posted on gate 2. the work was full of joy, we work like real engineers. We found that the best way to perform this task was to have two people document the disassembly, one wrote each step while the other took pictures and labeled the parts to be put in containers. The other two members then worked together to find the necessary tools and removed the fasteners that hold the snow-blower components together.

Gate 3: Product Analysis – In the product analysis phase, the individual components of the snow-blower were analyzed for part geometry, manufacturing methods, and complexity of the geometry and interactions with other components. By performing these studies, the manufacturing processes were reinforced and conclusions were made that connected the Four Factors to the design of the significant components. In this gate, three important components of the engine were modeled using Autodesk Inventor. Additionally, an Engineering Analysis was performed to calculate the convection of heat from the engine heat sink to the surrounding environment. This information could be used to help drive possible redesigns of the engine block and the surrounding exterior casings.

Gate 4: Product Explanation – During the product explanation phase, the snow-blower was reassembled and the process was compared to the original assembly as well as to our initial disassembly of the device. Throughout the disassembly, the roles assigned to each group member reflected those seen in the Gate 2 disassembly of the Snow-blower.

Gate 5: Delivery - The last phase of this project is the conveyance in which all the deliverables were finalized. A 5 minutes presentation was prepared to be given to the class and the instructors that introduced the Toro Snow-blower and highlighted the design recommendation of reconfigurable handle bars.