Locked transmission
Locked gears are gears whose degree of running is zero or less than zero. They do not meet the Grübler's forced running condition , but are " operable due to special dimensions or the flexibility of the gear members .... Multiple arrangements are chosen if ... highly stressed work organs ... are to be moved, which would tilt without this measure. "
An example of “multiple arrangements” is the parallel crank gear with 3 cranks. The large working organ (here the coupling ) is protected against tilting due to its large mass by the third crank . The degree of running is F = 0. The prerequisite for running ability are the “special dimensions”, i. This means that the three joints on the frame and on the coupling form congruent triangles and that the three cranks are the same length. There are thus high demands on the manufacturing accuracy.
Individual evidence
- ^ Johannes Volmer : Getriebetechnik - Koppelgetriebe , Verlag Technik, Berlin, 1979, p. 381.
- ^ Johannes Volmer: Transmission technology - basics , Verlag Technik, Berlin, 1995, p. 34, table 2.7., 1st example.