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Design & Development of a Sit to Stand and Suspension Device for Treadmill Gait Training

Ghannadi, Borna | 2010

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 40638 (08)
  4. University: Sharif University of Technology
  5. Department: Mechanical Engineering
  6. Advisor(s): Farahmand, Farzam; Saadat Foumani, Mahmoud
  7. Abstract:
  8. A high percentage of patients with lower extremitiy disability consists of those suffer from paraplegy, hemiparety, spinal cord injuries and chronic stroke. Currently, a wast variety of methods are used for gait rehabilitation of these patients. Beside physiotherapy and different types of exercises, gait trainer systems have been devloped and used recently to help patients to obtain their walking abilities. The main goal of this work was to design and develope a device to lift a patient from sitting position on a chair to standing position in a safe and balanced mode besides obtaining enough space for physiotherapist that can easily help the patient in gait training on treadmill, also to improve patient’s gait to normal gait with vertical center of mass displacement. Based on above willings we started conceptual design, to limit the costs we used patient lift device Nova-300, that we consulted on nondestructive changes for it to accomplish our needs. In next step we designed a method to measure normal force on a cable with a body on it in 2D then we used this method as a concept to design and choose a proper body harness and hanger. Besides we used 2D design method for hammok design for a complete rest on it. Next step was detail design in which the complete system is designed and analysed. One of our goals were to create a vertical reciprocation based on a normal gait, for this we designed the needed system (choosing motor, its position and modal analysis) but because of economic problems we have used a hand winch instead of that motor. At last we constructed the mechanism and it meets our needs.

  9. Keywords:
  10. Paraplegic Patienst ; Gait Rehabilitation Device ; Body Weight Support ; Harness ; Vertical Displacement During Gait

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