Introduction to RV reducer model RV transmission is a n […]
Introduction to RV reducer model
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 hysteresis 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.
Working principle of RV reducer model
1st speed reduction part...Spur gear reduction mechanism
The rotation of the input shaft is transmitted from the input gear to the spur gear, and is reduced in accordance with the gear ratio. This is the first speed reduction section.
2nd speed reduction unit...Differential gear reduction mechanismThe 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, there are only one more pin teeth than the RV gear, 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.