Design and Development of an Elbow Exoskeleton Mechanism

Project Title

Design and Development of an Elbow Exoskeleton Mechanism

Project Area of Specialization Mechanical EngineeringProject Summary

The pr?ject i? t? enhance ?tr?ke preventi?n and treatment. Acc?rding t? the Paki?tani ?tr?ke a???ciati?n, ar?und ?ne milli?n ?tr?ke victim? are diagn??ed each year, and the rati? ?f therapi?t? i? quite l?w. Numer?u? techn?l?gie? have been created, h?wever rehabilitati?n i? ?ften limited t? a ?ingle kind ?f exerci?e. ??me are ??ftware-c?ntr?lled, nece??itating the gathering ?f ?en??ry input and a c?mplicated c?ntr?l architecture.

           T? addre?? thi? gap, a mechanical device i? empl?yed t? give ?tr?ke therapy. The kn?wledge ab?ut the bi?l?gical term m?de ?f m?ti?n and mu?cle m?vement? ?f the elb?w j?int has been collected via ?tudy and literature evaluati?n, a? well a? which variable? trigger ?tr?ke. Then ?tr?ke rehabilitati?n meth?d that a therapi?t mu?t f?ll?w in ?rder t? rec?ver a patient'? elb?w was implemented using the exoskeleton to a??i?t therapy, also the design of exoskeleton i? very u?er-friendly. Such that even after one to three trail a patient can easily able to perform exercises by using this device.

           The devel?pment ?f a pa??ive type p?rtable elb?w ex??kelet?n all?w? f?r the delivery ?f three pha?e? ?f rehabilitati?n in a ?ingle ?tructure with?ut impairing range ?f m?ti?n ?r ?afety a?pect?. Three ?tep? c?mpri?e the rec?very training. The fir?t ?tage c?ntr?l? j?int m?vement actuated by an external m?t?r. The ?ec?nd ?tage f?cu?e? ?n a??i?ting m?ti?n? u?ing a??i?tive f?rce, while the la?t ?tage add? diver?ity and challenge t? w?rk?ut?. U?ing a m?t?r and ?pring?, a technique ha? been de?igned t? rehabilitate the ?tr?ke c?nditi?n.

Project Objectives

The ?bjective ?f the pr?ject i? t? enhance ?tr?ke preventi?n and treatment and also thi? pr?ject i? t? devel?p and build an elb?w ex??kelet?n, ?ince the n?ti?n ?f an ex??kelet?n d?e? n?t exi?t in ?ur nati?n. ?tr?ke patient? need a ?pecialized therapi?t t? lead them thr?ugh exerci?e. H?wever, thi? meth?d require? the patient t? be under the ?b?ervati?n ?f a therapi?t, and if the patient under?tand? the exerci?e but i? pr?ne t? d? it inc?rrectly, thi? pa??ive ex??kelet?n i? ideal f?r thi? purp??e. The ex??kelet?n i? a u?er-friendly device that enable? patient? t? undertake exerci?e? with ea?e. Additi?nally, the w?rk?ut? are perf?rmed at the pr?per angle? while utili?ing thi? rehabilitati?n gadget. The rehabilitati?n device make? u?e ?f c?mpre??ive ?pring? t? en?ure that the arm m?ve? ?m??thly thr?ugh?ut w?rk?ut?. Becau?e the device i? p?rtable, n? ?pecial area i? required f?r rehabilitati?n.

Additi?nally, the ?bjective ?f ?ur endeav?ur i? t? educate the public ab?ut the ex??kelet?n and it? benefit?. Thu?, up?n c?mpleti?n ?f thi? ?tudy, the public will be aware ?f ex??kelet?n-ba?ed rehabilitati?n pr?cedure?.

Project Implementation Method

• Reviewed the re?earch publicati?n? relevant t? ?ur ?ubject. Then, after reviewing the re?earch publicati?n?, pa??ive type of ex??kelet?n was selected.
• After ?election an ex??kelet?n ?f the pa??ive type. The c?mp?nent? ?uch a? ?pring? and r?d? that are readily acce??ible in the market was selected.
• Each c?mp?nent was ch??en by calculation of the ?pring ?tre??e? in each c?mp?nent. And a m?t?r with a ?pecified t?rque was ch??en t? initiate the pr?ce??.
• The material was also ch??en in acc?rdance with the calculati?n?.
• Cad m?del? was created ba?ed ?n it? weight and ability t? meet ?ur requirement?.

Benefits of the Project

• The elb?w ex??kelet?n'? fir?t u?e i? t? rehabilitate the ?tr?ke patient'? arm.
• Thi? give? a variety ?f w?rk?ut?. An?ther applicati?n i? t? a??i?t patient? wh? have injured their arm? in way? ?ther than ?tr?ke patient?.
• ?ne ?f the u?e? i? at a facility f?r the rehabilitati?n ?f war victim?. There i? n? en?ugh rehabilitati?n mechani?m in place. Thu?, thi? ex??kelet?n may be handy ?ver there.

Technical Details of Final Deliverable

?ur m?del i? Pa??ive in nature. ?ur m?del ha? mainly three m?de?. Fir?t m?de i? f?r highly effected ?tr?ke patient which i? even unable t? m?ve hi? arm. ?ec?nd m?de i? f?r mild ?tr?ke patient . Third m?de pr?vide? variety ?f exerci?e? by a??i?tance ?f re?i?tive ?pring?. F?r elb?w j?int we will u?e univer?al j?int which pr?vide flexi?n and exten?i?n m?vement a? well a? lateral m?vement (±5 degree). The h?ll?w c?nnecting ?teel r?d? are u?ed t? pr?vide ?tructure ?tability. Tefl?n gear are u?ed.

In fir?t ?tage, a??i?tive f?rce i? pr?vided by u?ing m?t?r ?? that patient can m?ve hi? arm fr?m 0 t? 15 degree. The m?t?r tran?fer? it? m?ti?n fir?t t? gear and then it tran?fer? lead ?crew. lead ?crew will m?ve nut ?lide backward and f?rward . Due t? thi?, c?nnecting link attached t? the nut ?lider help t? m?ve the arm. ?ne ?ide ?f c?nnecting link i? c?nnected t? nut ?lider and ?ther i? c?nnected t? the f?rearm ?upp?rting bar. Thi? m?t?r functi?n pr?vide? flexi?n m?ti?n ?f arm.  The lead ?f the lead ?crew i? 8×10-3 m which pr?vide? ?m??th a??i?tive f?rce t? perf?rm exerci?e.

In ?ec?nd ?tage, the f?ur bar mechani?m active? t? bl?ck the m?ti?n ?f arm at a p?int.

Thi? l?cking mechani?m c?ntain? tw? jaw claw? which gra?p the tw? ?lider? (c?ncentric and nut ?lider) t?gether. In thi? ?tage m?ti?n perf?rm i? in between

 15 t? 45 degree . The unl?cking take? place when the arm m?ve? little bit bey?nd the ?et limit ?? the tw? jaw claw? ?pen.

In third ?tage, the arm can able t? perf?rm many exerci?e?. The highly ?tiffne?? ?pring? are u?ed t? pr?vide re?i?tive f?rce?. In thi? ?tage the patient can al?? perf?rm the lateral m?vement (±5 degree).

Final Deliverable of the Project Hardware SystemCore Industry ManufacturingOther IndustriesCore Technology Wearables and ImplantablesOther TechnologiesSustainable Development Goals Good Health and Well-Being for PeopleRequired Resources

Item Name	Type	No. of Units	Per Unit Cost (in Rs)	Total (in Rs)
			Total in (Rs)	71500
Motor	Equipment	1	3000	3000
Gear	Equipment	2	5000	10000
Lead Screw	Equipment	1	3000	3000
Compressive Spring	Equipment	6	2000	12000
Belt	Equipment	1	2500	2500
Rod	Equipment	4	1500	6000
Threading	Miscellaneous	1	5000	5000
Cutting	Miscellaneous	1	2500	2500
Surface Finish	Miscellaneous	1	2500	2500
Teflon Structure	Equipment	1	25000	25000