The graduation thesis adresses the optimization of parallel mechanism for lifting and lowering the seat of mobile scooter. The mechanism ensures the rigidity and security of the use of a mobile scooter. The thesis present a kinematic and stiffness analysis of the solution for providing a parallel motion, while also taking into account the ergonomics of a person. We also carried out a static load analysis that operates on a parallel mechanism and a static analysis of the rigidity of the entire parallel mechanism.
We have accurately calculated the force for fixing the mechanism, which depends on the weight of the person acting on the parallel mechanism. The dimensions of the mechanism have a major influence on the moment that occurs due to the force of the human weight. With the rigidity analysis in the SolidWorks program, we optimized the technical solution to a design in which the stress and strains are below the acceptable limits. The mechanism was confirmed by an experimental test when the mechanism was installed in a mobile scooter.
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