RV Worm Gear Reducer
RV transmission is a new type of transmission. It is developed on the basis of traditional pin-vibration planetary transmission. It not only overcomes the shortcomings of general pin-vibration transmission, but also because of its small size, light weight, large transmission ratio range, and longevity. It has a series of advantages such as long, stable accuracy, high efficiency, stable transmission and so on.Increasingly received extensive attention at home and abroad.The RV reducer is composed of a cycloidal pin wheel and a planetary support. With its small size, strong impact resistance, large torque, high positioning accuracy, low vibration, large reduction ratio and many other advantages, it is widely used in industrial robots, machine tools, and medical testing. Equipment, satellite receiving system and other fields.Compared with the harmonic drive commonly used in robots, it has much higher fatigue strength, stiffness and life, and the accuracy of the return difference is stable. Unlike the harmonic drive, the motion accuracy will be significantly reduced as the use time increases. Therefore, many countries in the world RV reducers are mostly used in high-precision robot transmissions. Therefore, this kind of RV reducers has a trend of gradually replacing harmonic reducers in advanced robot transmissions. The RV-E type reducer is a 2-stage reduction type.RV Transmission Schematic RV Transmission Schematic 1st reduction part...The rotation of the input shaft of the spur gear reduction mechanism is transmitted from the input gear to the spur gear, and the speed is reduced according to the gear ratio.This is the first speed reduction section.The second reduction unit...The differential gear reduction mechanism spur gear is connected to the crankshaft and becomes the input of the second reduction unit.On the eccentric part of the crankshaft, the RV gear is installed through a rolling bearing.In addition, on the inside of the housing, only one more pin tooth than the RV gear is arranged at the same pitch.If the fixed housing rotates the spur gear, the RV gear also performs eccentric movement due to the eccentric movement of the crank shaft.At this time, if the crankshaft makes one revolution, the RV gear will rotate one tooth in the opposite direction to the crankshaft.Mechanism diagram Mechanism diagram This rotation is output to the shaft of the second speed reduction section.When the shaft is fixed, the housing side becomes the output side.There are many ways to use the RV-E reducer.Rotation direction and speed ratio.Please choose the best practical method.The reduction ratio i obtained by the addition of the first speed reduction section and the second speed reduction section varies depending on the method of use, and can be calculated from the speed ratio value shown in the following formula.Shaft rotation condition R: Speed ratio value Z1: Number of teeth of input gear Z2: Number of teeth of spur gear Z3: Number of teeth of RV gear Z4: Number of needle tooth roots i: Reduction ratio.
