The work is devoted to the study and improvement of the design efficiency of industrial exoskeletons. Such devices are needed to perform the work that requires high physical activity in various production processes. To determine the optimal design, the developments of foreign and domestic markets were studied. It was revealed that the exoskeleton developed by Karfidov Lab LLC has the highest performance characteristics compared to the analogues. However, this design lacks a convenient saddle attachment system to support the user, and the exoskeleton is heavy — 6 kg.
The authors proposed the modernization of the design of an industrial exoskeleton for the lower extremities. Modernization is associated with the use of solutions aimed at reducing the weight of the exoskeleton, as well as improving ergonomics by developing a saddle for each leg of the exoskeleton and a user fixation system. For this purpose, a solid-state 3D model and design documentation for producing exoskeleton were developed in the SolidWorks environment. To reduce the weight of the exoskeleton, plastic parts were used. The exoskeleton provides support for the user body, made in the form of a vest, as well as a fixation system in the form of straps located on the foot, shin, and thigh. To ensure increased shock absorption with an active exoskeleton, a gas spring manufactured by Suspa, model Varilock EL2-111-79-600N, was installed. To increase the strength of plastic parts, the reinforcement method was used. A saddle is introduced that provides a soft contact between the user and the system in the active and passive positions of the exoskeleton. The main requirements for the modernized development were the low cost of the final product and the lightness of the overall mass of the structure.
2. De Looze M.P., Bosch T., Krause F., Stadler K.S., O’Sullivan L.W. Exoskeletons for industrial application and their potential effects on physical work load. Ergonomics. 2016. Vol. 59. № 5. pp. 671–681. DOI: 10.1080/00140139.2015.1081988
3. Norris J.A., Granata K.P., Mitros M.R., Byrne E.M., Marsh A.P. Effect of augmented plantarflexion power on preferred walking speed and economy in young and older adults. Gait & Posture. 2007. Vol. 25. Iss. 4. pp. 620–627. DOI: 10.1016/j.gaitpost.2006.07.002
4. Nosova А. Exoskeleton is not a suit from the future, but a necessity. Available at: https://rb.ru/longread/exosceletons/ (accessed: October 20, 2021). (In Russ.).
5. Bukhtiyarov I.V., Geregey A.M., Efimov A.R., Kostyleva E.V. Industrial Exoskeletons as Tools for Ensuring Industrial Safety. Normative and Technical Regulation. Bezopasnost Truda v Promyshlennosti = Occupational Safety in Industry. 2020. № 12. pp. 53–57. (In Russ.). DOI: 10.24000/0409-2961-2020-12-53-57
6. Zoss A.B., Kazerooni H., Chu A. Biomechanical design of the Berkeley lower extremity exoskeleton (BLEEX). IEEE/ASME Transactions on Mechatronics. 2006. Vol. 11. № 2. pp. 128–138. DOI: 10.1109/TMECH.2006.871087
7. Sawicki G.S., Ferris D.P. A pneumatically powered knee-ankle-foot orthosis (KAFO) with myoelectric activation and inhibition. Journal of NeuroEngineering and Rehabilitation. 2009. pp. 6–23. DOI: 10.1186/1743-0003-6-23
8. Collins S.H., Wiggin M.G., Sawicki G.S. Reducing the energy cost of human walking using an unpowered exoskeleton. Nature. 2015. Vol. 522. pp. 212–215. DOI: 10.1038/nature14288
9. Kobelev O., Valeeva L., Gerasimova A. Forging process flow development for plate production. Solid State Phenomena. 2021. Vol. 316 SSP. pp. 240–245. DOI: 10.4028/www.scientific.net/SSP.316.240
10. Giovacchini F., Vannetti F., Fantozzi M., Cortese M., Parri A., Yan T., Lefeber D., Vitiello N. A light-weight active orthosis for hip movement assistance. Robotics and Autonomous Systems. 2014. № 73. pp. 123–134. DOI: 10.1016/j.robot.2014.08.015
11. Devyatiarova V.V., Balakhnina E.E., Valeeva L.M. Development of a mathematical model for a workpiece heating and cooling in a protective medium while treatment under pressure. Defect and Diffusion Forum. 2021. Vol. 410 DDF. pp. 115–122. DOI: 10.4028/www.scientific.net/DDF.410.115
12. Fomin A.A., Guse V.G., Timerbaev N.F. The processing of the profile surface of the work-pieces, characterized by low rigidity. Solid State Phenomena. 2020. Vol. 299 SSP. pp. 852–860. DOI: 10.4028/www.scientific.net/SSP.299.852
13. Exochair. Available at: https://karfidovlab.com/projects/exochair/ (accessed: July 24, 2021).
14. Exoskeleton technologies. Available at: https://exorise.com/ (accessed: July 25, 2021). (In Russ.).