Inverted Coupler Curve Method

摘要

The primary purpose is path generation and time path generation by the 4-bar linkage. The inverted coupler curve is generated by a point on the coupler where one end moves on the crank circle and the other on the desired curve. If neither the corresponding centrode nor the polodes intersect then, in general, the resultant coupler curve has only 4 points in common with the desired curve. If the polodes intersect then, in general, 6-point solutions are obtained, etc. The method is applied to straight line mechanisms where the coupler curve is to deviate little from the straight line over the entire range. The method is then applied to points on a circular arc. The generation of an approximate ellipse is shown for illustrative purposes and the result is very close to the ellipse. The method can be applied to any combination of links and joints.