Tub Lift Rev 2 Group 16006 Agenda The

Tub Lift Rev. 2 Group 16006

Agenda The Team ○ Project Background ○ Project Statements ○ Use Scenarios ○ Interview Questions ○ Customer Requirements ○ Engineering Requirements ○ House of Quality ○ Benchmarking ○ Draft of Project Plan ○

The 16006 Team Member Alex Branch Dom Hall Alex Krall Jake Swearingen Major Mechanical Engineering Industrial and Systems Engineering Mechanical Engineering Special Roles Primary Designer and Tester Vendor Liaison, Customer Liaison, Technical Writer Project Manager Primary Designer and Tester

Project Background ○ ○ ○ Water powered bath lifts are mainly used by individuals with limited balance, coordination, or mobility of their body (especially lower extremities) The lifts help them enter and exit a bathtub, as well as lower themselves into the water. These systems are easy to use, affordable, and were once the standard in bathtub lifts. As newer battery-powered systems have become more common, it is getting more difficult to repair or replace waterpowered lifts. The customer for this project is a wheelchair user who relies on this type of assistive device in order to maintain autonomy and privacy.

Previous Design ○ Prototype is not completely functional ○ Impractically heavy ○ Does not meet current customer requirements

Project Statement Theresa, a wheelchair user relies on a hydraulic power bath lift to assist her with entering and exiting her bath tub. Theresa has suffered from polio in the past and is gradually losing movement in her extremities as a result. The water-powered lift that she currently utilizes has been requiring frequent repairs due to its age (parts are becoming scarce, expensive and possibly unreliable). Development of a new, affordable and easy-to-use lift mechanism for her bath tub is desired. The final mechanism must be able to both lower, lift and rotate Theresa into and out of her tub in a timely manner, while taking into consideration the strict spatial constraints of her bathroom. An ergonomic and safe design is preferred.

Use Scenarios

Interview Questions ○ How permanent can this project be? ○ How can this system be powered? ○ What materials can be used? ○ What is the biggest issues with the current set up? ○ Are there any other specific requirements for this project? ○ How is the current system used? ○ How would you ideally like to get into the tub?

Customer Requirements ○ ○ ○ ○ Keep electronics and water separate Chair must swivel Unit cannot be permanent (can be removed) Similar functionality to current unit Equal or smaller size than current unit Comfortable seat Unit must be sanitary and durable in water Chair can recline

Engineering Requirements

House of Quality Critical Engineering Requirements: ○ Overall Weight ○ Rotation of Seat ○ Distance to Bottom of Tub ○ Footprint of Lift ○ Sustainable Maximum Weight

Benchmarking Product Bellavita Auto Bath Lift Unit Weight (lbs) Capacity (lbs) Vertical Adj. (in) Recline (deg) Qty. Assembly Parts Cost 20. 5 300 2. 3 - 18. 9 50 2 $565 20. 5 300 2. 3 - 18. 9 50 2 $499 24. 5 265 2. 3 - 17 10 (fixed) 4 $699 28. 9 375 3. 1 - 18. 1 130 ---- $700 19. 0 200 2 - 21 ---- 1 $1400 (http: //www. drivemedical. com/index. php/b ellavita-auto-bath-lifter-445. html) Drive Whisper Auto Bath Lift (http: //www. 1800 wheelchair. com/product/ drive-whisper-automatic-bath-lift/) Riva Bath Lift (http: //www. 1800 wheelchair. com/product/r iva-bath-lift/) Aqua. Joy Premier Bath Lift (http: //www. 1800 wheelchair. com/product/ drive-aquajoy-premier-plus-recliningbathlift/) **Portable Bath Lift (http: //www. abledata. com/product/portable -bath-lift-model-7189) **: Discontinued Product (Price is not accurate)

Risk Management Risk Severity Likelihood Reduction Mechanical Failure 3 3 Include Appropriate Factor of Safety Falling off of Lift 9 3 Include Safety Instructions and Incorporate Handles Electrical Hazard 9 3 Minimize or Eliminate Electrical Components in Contact with Water Tangling of Hoses 3 3 Appropriate Cable Management

Project Plan (Next 3 Weeks) ○ Develop method of swiveling tub lift chair ○ Determine the method of lifting/lowering tub lift operator ○ Choose the best overall design ○ Determine materials needed for the components of the lift ○ Analyze design using mechanics ○ Create a Bill of Materials

Project Plan (MSD 1) Ambition since this is the project’s second iteration: ○ Have a solid, realistic design ready to go ○ Begin finding vendors and order parts ○ Once parts have arrived, being assembly of our prototype ○ Test functions and incrementally improve design even further

Questions?