BG103639A - Planetary reducer - Google Patents

Abstract

The planetary reducer is designed for driving of machinery or pieces of equipment with high gear ratios. It attains a maximum gear ratio per unit of volume at specified power, reduces the dynamic load and noise, and improves the distribution of the load along the length of the gear teeth. In addition it increases the time of the internal meshing of the gear having small difference in the number of their teeth. In an option of execution, the reducer comprises a casing (1) with gear rim with internal teeth, and a shaft-gear (4) coaxial to it, meshed by satellite gears (5 & 6) of different diameters, mounted by axles (7) in a cassette (8), balanced by a counterweight (9). Gears (5 & 6) are meshed by and inner gear rim to the internal teeth of a gear unit (10) made of three gear rims with a common shaft, eccentric to the central shaft of the reducer. The middle gear rim of the gear unit (10) has outer teeth and is meshed by inner teeth of a gear (3), resting in the hub or casing (1) and leading out the rotative motion of the reducer. The external gear rim of the gear unit (10) has outer teeth meshed to the inner teeth of casing (1). In another option of the reducer the inlet shaft is frictionally meshed by means of satellite roller of different diameters, which are frictionally meshed to an internal rim or a gear rim unit (10) which, in this case, has two gear rims - a middle and an external one, both meshed as was the case in the first option of the reducer, with gear (3) and gear rim of the casing (4), respectively. 4 claims, 4 figures