P15007: Anti-Rollback Wheelchair
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Detailed Design

Table of Contents

Please follow the link for a collection of our Detailed Design Documents.

Phase V Agenda

Phase V Agenda

Progress Summary

At the start of Phase III, team P15007 developed a project specific list of deliverables for Week 15. Below are the expected and actualized progress percentages for Week 15 for each deliverable.

Week 15 Progress

Week 15 Progress

Adaptability

APPROVED PROJECT SCOPE: Team P15007 Anti-rollback device will be adaptable to the following Breezy Manual Wheelchair parents models:


Breezy Model Adaptability Matrix

Breezy Model Adaptability Matrix



The following photos reflect relevant aspects of the Quick Release models that have been taken into consideration when determining scope.

Quick Release Model

Quick Release Model

Engineering Analysis

Free Body Diagram

Free Body Diagram

Ratchet Tooth Loading Scenario 41.4lbf

Ratchet Tooth Loading Scenario 41.4lbf

Feasible Control Location

Feasible Control Location

Bill of Materials (BOM)

MSD Parts Log

MSD Parts Log

CAD Package

Assembly

Assembly

Ratchet & Pawl

Ratchet & Pawl

Test Fixture

Test Fixture

Assembly Plan

Test Plan

Manufacturing Plan

Scaled Up Manufacturing Plan

Maintenance Manual

Installation and Maintenance Manual

Risk Management

CUSTOMER INPUT REQUIRED:
  1. WEIGHT: With design completed and materials assigned, Creo estimates total system weight to be approximately 12 lbs.
    Proposal: Engineering Requirement No. 7: Total System Weight Ideal Value 11 lbs Marginal Value 13 lbs
    Conclusion: System weight reduced to be under 8 lbs total. Customer has signed off on change.
  2. BUDGET: Currently, system design is over budget by $20. This includes roughly estimated shipping costs.
    Proposal: With more funds, we have the opportunity to conduct destructive testing and design a quick release shaft. If interested, we can create a budget and proposal over inter-session for the beginning of MSD II. However, according to current budget estimates, we are requesting up to $50 additional funds to cover shipping costs.
    Conclusion: Budget has been extended to $450 to cover shipping costs.
  3. WHEELCHAIR FUNCTIONALITY: The current shaft design does not support Quick-Release function, although it can adapt to the quick-release wheelchairs.
    Proposal: We have identified three options: (1) Additional funds support wheel retention redesign to support function (2) Accept lost functionality of quick-release function (3) Reduce other costly functions i.e. locking brake handles and push/pull cables.
    Conclusion: Wheelchair quick-release function can be retained in scaled-up manufacturing plan. Thus, it does not need to be included in the prototype, but rather should be explained in the manufacturing plan.
Risk Management

Risk Management

Risk Management - Closed Risks

Risk Management - Closed Risks


Table of Contents

Introduction Phase I Phase II Phase III - V

Team Values and Norms

Meeting Minutes

Photo Gallery

Problem Definition

Systems Design

Detailed Design

Week 9 Project Plan

Week 12 Project Plan

MSD I Gate Review

MSD II

MSD II Project Plan

MSD Final Deliverables