Energy-Free Adjustment of Gravity Equilibrators by Adjusting the Spring Stiffness

W. D. Van Dorsser, R. Barents, B. M. Wisse, Mark Schenk, J. L. Herder

Research output: Contribution to journalArticle (Academic Journal)peer-review

38 Citations (Scopus)


Static balancing is a useful concept to reduce the operating effort of mechanisms. Spring mechanisms are used to achieve a constant total potential energy, thus eliminating any preferred position. Quasi-statically, the mechanism, once statically balanced, can be moved virtually without the operating energy. In some cases, it is desirable to adjust the characteristic of the balancer, for instance, due to a change in the payload in a gravity balanced mechanism. The adjustment of current static balancers requires significant operating energy. This paper will present a novel variant to adjust the spring- and linkage-based static balancers without the need for external energy. The variant makes use of the possibility to adjust the spring stiffness in an energy-conserving way by adjusting the number of active coils. The conditions under which it functions properly will be given, and a proof of the concept model will be shown.
Original languageEnglish
Pages (from-to)1839-1846
JournalProceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science
Issue number9
Publication statusPublished - 2008


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