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2. Strain wave gearing - Wikipedia

   en.wikipedia.org/wiki/Strain_Wave_Gearing

   The German company Harmonic Drive SE manufactured the first series-produced gears under the product name or registered trademark Harmonic Drive. Strain wave gearing has some advantages over traditional gearing systems such as helical or planetary gears, including: no backlash, compactness and light weight, high gear ratios,

3. Epicyclic gearing - Wikipedia

   en.wikipedia.org/wiki/Epicyclic_gearing

   This planetary gear train consists of a sun gear (yellow), planet gears (blue) and carrier (green) inside a ring gear (red) An epicyclic gear train (also known as a planetary gearset) is a gear reduction assembly consisting of two gears mounted so that the center of one gear (the "planet") revolves around the center of the other (the "sun").

4. Sun and planet gear - Wikipedia

   en.wikipedia.org/wiki/Sun_and_planet_gear

   The sun and planet gear converted the vertical motion of a beam, driven by a steam engine, into circular motion using a 'planet', a cogwheel fixed at the end of the connecting rod (connected to the beam) of the engine. With the motion of the beam, this revolved around, and turned, the 'sun', a second rotating cog fixed to the drive shaft, thus ...

5. Differential (mechanical device) - Wikipedia

   en.wikipedia.org/wiki/Differential_(mechanical...

   Planetary differential used to drive a chart recorder c. 1961. The motors drive the Sun and annular gears, while the output is taken from the planet gear carrier. This gives 3 different speeds depending on which motors are on. Non-automotive uses of differentials include performing analogue arithmetic. Two of the differential's three shafts are ...

6. Continuously variable transmission - Wikipedia

   en.wikipedia.org/wiki/Continuously_variable...

   When the pump is configured for low displacement, it produces a low volume of oil flow, causing the hydraulic motor(s) to turn more slowly. As the pump's displacement is increased, a greater volume of oil flow is produced for any given engine RPM, causing the motor(s) to turn faster. Advantages of a hydrostatic CVT include: Capacity scalability.

7. Magnetic gear - Wikipedia

   en.wikipedia.org/wiki/Magnetic_Gear

   There is no equivalent mechanical gear system, since the two rotating gears are physically isolated from each other and only interact magnetically. In addition, there are "cycloidal drive" gears with a gear ratio similar to planetary drives, also called "epicyclic" or "eccentric" gears. Magnetic gears advantages: Leak proof mechanical coupling