Table of Contents
Please follow the link for a collection of our Detailed Design Documents.
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.
AdaptabilityAPPROVED PROJECT SCOPE: Team P15007 Anti-rollback device will be adaptable to the following Breezy Manual Wheelchair parents models:
The following photos reflect relevant aspects of the Quick Release models that have been taken into consideration when determining scope.
- Ratchet Tooth Analysis
- The Figure above shows the maximum loading scenario (41.4 lbf) applied to the face of the tooth. This assumes only 1 Pawl is engaged and shows the system will not fail nor yield.
- Subject Matter Expert Consulted: Dr. DeBartolo
Bill of Materials (BOM)
- Subject Matter Expert Consulted: Professor Leipold - Advanced Modeling Constraints
- Subject Matter Expert Consulted: John Bonzo - Manufacturability
- Subject Matter Expert Consulted: Rob Kraynik - Manufacturability
- BILL OF MATERIALS
- PARTS LIST
- ROUTE SHEETS
- FISH BONE ASSEMBLY DIAGRAM
- OPERATIONS PROCESS CHART
- SOURCING - RAW MATERIAL
- SOURCING - PARTS
Maintenance ManualInstallation and Maintenance Manual
- Ratchet and Pawl Mechanism
Risk ManagementCUSTOMER INPUT REQUIRED:
- WEIGHT: With design completed and materials assigned,
Creo estimates total system weight to be approximately 12
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.
- 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.
- 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.
Table of Contents
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