camellia Posted March 29, 2018 Posted March 29, 2018 (edited) Motor-brain Droid Brothers are: Xtra Large Motor - the eldest brother Large Motor - the second brother Medium Motor - the youngest brother Simple, but Ingenious. Ugly, but Close. A worm drive is a gear arrangement in which a worm (screw) meshes with a worm gear (aspur gear). A worm drive can reduce rotational speed or transmithigher torque. One of the major advantages of worm gear drive units are that they can transfer motion in 90 degrees. The gear ratio is: 1 to teeth of the worm wheel The direction of transmission is not reversible due to the greater friction involved between the worm and worm-wheel. Worm gear configurations in which the gear cannot drive the worm are called self-locking. The eldest brother - Xtra Large Motor-brain The second brother - Large Motor-brain The youngest brother - Medium Large Motor-brain Power - Battery and its tray, Worm Hand and Tummy - Worm gear Feet - Each foot has 4 wheels Back - Antenna and pigtail Profile - Crankshaft and Link Mechanism drive Arms and Legs Three brothers - Red, Blue and Yellow Welcome to Camellia Café http://www.camellia.xin Edited March 29, 2018 by camellia Quote
Oliver 79 Posted March 29, 2018 Posted March 29, 2018 Clever mechanism. I like them a lot. It's nice to see something a bit different. If you took the wheels of, would they walk better? Quote
camellia Posted March 29, 2018 Author Posted March 29, 2018 27 minutes ago, Oliver 79 said: Clever mechanism. I like them a lot. It's nice to see something a bit different. If you took the wheels of, would they walk better? Thank you! If no wheel, it looks like more as a human. It will be bipedal. With wheels, the friction is low. Quote
Jim Posted March 29, 2018 Posted March 29, 2018 Hi, Very cool! They put a smile on my face. Please be aware that the max pic width is 1024 pixels. So please resize the linked images. Thanks. Quote
BusterHaus Posted March 29, 2018 Posted March 29, 2018 Cute project, although they walk at the same speed as this guy: https://media.giphy.com/media/ToMjGpoFxSUTbWU1wkM/giphy.gif Quote
camellia Posted March 29, 2018 Author Posted March 29, 2018 You are right. They runs slowly due to the large gear ration. Besides, if 9V power is used, they are quicker and stronger. To change length of crankshaft and link rods, a little higher speed may also be gotten. Quote
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