Is the RV reducer used in industrial robots single stage transmission? Calculation method of transmission ratio, thank you!
The robot reducer usually uses harmonic reducer and RV reducer (that is cycloid pin gear reducer). At present, the best is the radial differential reducer (it is evolved from the automobile differential). Harmonic reducer technology is poor, including Japan, including the continuous improvement; RV reducer mature process, many of its crankshaft and other processes difficult; diameter reducer is also RV reducer of the modified type, that is, the abolition of crankshaft,
Excellent technology and more mature and superior, the diameter difference of sub transmission ratio up to infinity (practical for single tooth difference), the volume ratio of two is a harmonic reducer (i.e. the volume modulus is two times harmonic reducer), harmonic reducer and flexible transmission, the diameter difference of sub rigid reducer transmission. The robot motion in place of rigid transmission buffer stroke shorter and small RV reducer. The diameter difference of sub reducer and planetary reducer is less than the efficiency of harmonic reducer and RV reducer, so a lot of harmonic reducer transmission efficiency is lower than 0.8, the diameter difference of sub reducer planetary reducer meshing tooth number is more than five times less than the harmonic reducer and RV reducer, thus the diameter difference sub reducer theoretical accuracy only the higher harmonic reducer reducer is difficult to surpass RV. The radial differential reducer has great transmission power (harmonic reducer, industrial robot load 10Kg, diameter deviation, sub reducer, industrial robot can load 2000Kg). The CNOOC adopts foreign planetary reducer of submersible pump can only use 9 "(228.6mm) and the Shenyang University in Liaohe Oilfield wellhead, the son of your prince Dr. reducer of submersible pump can break 5" (127mm) (i.e. small wellhead diameter is less than 105mm sent a reducer load up to 35KW power). Gd980, SIASUN etc. the intention of contributions received sub diameter difference transmission technology Co Ltd, Japan is one of the development of the robot China pressing big three reducer bottleneck trip.
Not single stage drive. Two, the first stage is planetary gear drive, the second stage is needle roller, and the less differential gear drive. That is to say, when the planetary wheel rotates for one week, the second turns a tooth, which is called the "less difference tooth". The direction of rotation of the needle roller is opposite to the rotation of the planet wheel, that is to say, the input shaft and the output shaft rotate in the same direction.The transmission ratio is generally calculated as i=, the number of outer ring needle, the number of planet gear / the number of solar gear teeth. In general, the outer ring needle number = needle tooth number +1, used to increase the length of the meshing line, increase the load performance.
