Fully-functional Hand-cranked Hypocycloid Speed Reducer Model

thingiverse

https://youtu.be/xSAR1RtTnBs This is yet another addition to our collection of fully-functional gear models. This one may not have teeth, but it ain't no sucker! In a hypocycloid (or simply cycloid) speed reducer, a flower-shaped gear called cycloid disk moves around a stationary ring of round pins in a cycloidal motion, driven by an eccentric bearing or cam connected to the input shaft. Radial holes on the face of the cycloid disk in turn drive the pins of the output shaft. Hypocycloid drives are widely used in the industry due to their excellent characteristics, such as wide range of gear ratios, compact size, smooth transmission, high efficiency, high overload capacity, low noise, long service life, and compact design. We tried to make this hypocycloid drive model as "skeletal" as possible so that all the inner workings of this remarkable mechanism can be clearly seen. Post-Printing Print 2 disks and 2 cams, and one of each of the other parts. Hardware: 4 Metric countersunk Phillips-head M3x12 screws Assembly Instructions Insert the flat end of shaft into baseshaft, and insert baseshaft into handle. Make sure the holes in all three parts are aligned. Secure with two Phillips-head M3-12 screws. Insert conical end of shaft into ring from the bottom. Mount cam onto shaft, align it with the bottom hole on shaft, secure with a screw. Mount disk over cam. Mount the 2nd cam onto shaft, align it with the top hole on shaft, orient 180° relative to the 1st cam. Secure with a scew. Mount the 2nd disk over the 2nd cam. See picture for the correct positions of the two disks relative to each other. Install output by inserting its pins into the disks' radial holes. Secure with washer. How I Designed This With the help of an online calculator we developed, designing a hypocycloid drive is a breeze! See this video tutorial for details.