Model 12: Escort / quick return path mechanism (Watt-2),
used in an egg-box closing machine
Kinematic scheme:
Dimensions:
|
|
Dimensions
according literature [m] |
|
a |
0.2436 |
|
b |
0.2436 |
|
c |
0.5303 |
|
d |
1.5307 |
|
e |
0.8899 |
|
f |
0.0779 |
|
g |
0.0555 |
|
h |
1.1036 |
|
m |
0.3551 |
|
k |
0.3526 |
|
φ |
220° |
Explanation:
The path of point P is a coupler curve of the four-bar linkage A0ABB0,
such that a part approximates a straight line. To pass this part with constant
speed, a double crank mechanisms D0DEA0 has been placed
in series with the four-bar. This mechanism is typically suited for use in a
continuously moving production machine, when during the escort of the product a
contact force is required. In the egg-box application point P escorts the
egg-box, while the cover is closed. Point P holds down the box during a
critical phase in the folding operation, preventing that the egg-box will be
lifted off the production belt.
Literature: Klein
Breteler, A.J.: Kinematic optimization of mechanisms, a finite element approach
(chapter 9.3). Thesis TU Delft, 1987. ISBN 90-370-0012-6
Remarks:The
double crank mechanism of the model has been assembled wrong! (red and blue
link should be mounted like in the pictures).
