Browse > Article

Mobility in the Contact Joint of a Mechanism  

Lee, Jang-Yong (한국생산기술연구원)
Publication Information
Journal of the Korean Society for Precision Engineering / v.24, no.4, 2007 , pp. 109-114 More about this Journal
Abstract
The mobility (degree of freedom) of mechanisms can be regarded as independent coordinate to define its position. This concept is essential for kinematics, and for designing mechanisms in the practical point of view. Gruebler's equation has been applied to estimate the mobility using number of links and joints of a mechanism. In practical case, there are many types of mechanisms, which transfer motion by direct contact between two links. However, no exact kinematic definition has existed for the joint that the contact takes place in a mechanism. In this paper, a new concept of contact joint is defined and modified Gruebler's equation is suggested to calculate mobility of a mechanism with the joint. This concept would be useful in mechanism design because it will be possible to manage many contact mechanisms with kinematic exactness.
Keywords
Mobility; Degree of freedom; Mechanism design; Gruebler's equation; Contact joint; Contact mechanism; Full joint; Half joint;
Citations & Related Records
연도 인용수 순위
  • Reference
1 Lee, J. Y., 'Development of Fur insertig machine for brush,' Ministry of commerce, industry and energy, 2004
2 Lee, J. Y. and Chun, K. G, 'Mechanism Analysis and Optimum Design of Feeddog Transfer Mechanism and Needle stitching Mechanism of An Industrial Needle Driven Sewing Machine,' Journal of Korean Society for Precision Engineering, Vol.14, No. 10, pp.35-43, 1997
3 Erdman G A., Sandor, N. G. and Kota, S., 'Mechanism Design, Analysis and Synthesis,' Prentice Hall, Vol.1, 2001
4 Ampere, 'Essai sur la philosophie des sciences,' 1834
5 Erdman, A., 'Modern Kinematics: Developments in the Last Forty Years,' John Wiley & Sons. Inc., pp.3 - 20, 1992
6 http://www.library.cornell.edu/kmoddl-test/what.php
7 Norton, L. R., 'Design of Machinery 3rd Edition,' McGraw-Hill, 2004