Model 10: alternate dwell mechanism
Kinematic scheme:
Dimensions:
|
|
Measured at
model [m] |
Updated |
|
a |
0.022 |
(0.022) |
|
b |
0.138 |
0.1385 |
|
c |
0.055 |
(0.055) |
|
d |
0.083 |
0.0825 |
|
e |
0.138 |
(0.138) |
|
f |
0.117 |
0.1155 |
|
9 |
0.114 |
0.1155 |
|
h |
0.251 |
(0.251) |
Explanation:
The coupler bar
(green) has points B and D each having a straight part in their coupler curve. The
rockers (blue) have a dwell when point B or D respectively pass the straight
part. These dwells alternate, see the motion diagram of the x-co-ordinates. Point
K shows that other coupler points have not the property of a straight line.
Literature:
Remarks:
The dimensions b and d can be calculated, using the equation of Euler/Savary,
such that the curvature of the coupler curve is exactly zero. This has been
done in the symmetry positions of the slider-crank mechanism. The results are
listed in the column “updated”