"Planet gearing" by Meccano kinematics - 19/04/2020
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Description
Presented here are 3 planet gear drives.
The brass coloured pinions are all 19t pinions. The purple pinion has 20 teeth and the blue pinion has 17 teeth.
This type of planet drive can be found in a Heidelberg Platen Press, which I recently (april 2020) presented on Youtube.
The planet drive with the purple 20t pinion gives a ratio of 1:20.
The all 19t pinion drive doesn't do anything, it merely shows the principle of this type of drive.
The planet drive with the blue 17t pinion gives a ratio of 2:17 = 1:8.5
Interesting to mention is, that when the coloured pinion has less teeth than the planet gear (19t) the rotational direction of the output is in reverse relative to the input.
I like the considerable gear reduction by the usage of pinions only in relationship with the dimensions. Usually gear reductions are done by combinations of 19:57 and 15:60, combining these giving together 1:12 (clocks), but more space is required when using these geartrains and 1:12 is still not 1:20.
All my projects can be found at http://meccanokinematics.net and on Youtube under Meccano kinematics.
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patouminou on 03/05/2020 10:26:13 said
Hi Man ! Your model has kept me busy for a while to understand it, this is precious during these strange days and for that I thank you.
Happily I have found on this french Meccano forum
http://meccano.free-bb.fr/sujet-641167-823824-105893-1-Essai-Reel.html#num8
someone who explains me the mechanism and gives me the plane of the Standard Mechanism 85. I have built it and just posted it.
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