A rv reducer with large reduction ratio

Abstract

The invention provides a RV reducer with large reduction ratio. The RV reducer with the large reduction ratio is characterized in that the RV reducer includes pin wheel housings, cycloidal wheels, angular contact ball bearings, output plate racks, planet wheels, eccentric shafts, input shafts, and adjusting gears; the input shafts are located in the center position of the RV reducer, a gear structure is arranged at the tail ends of the input shafts; the planet wheels and the eccentric shafts are at least two sets and surround the input shafts in symmetrical distribution; the planet wheels andthe gear structures of the tail ends of the input shafts are meshed through at least two sets of adjusting gears; the output plate racks sleeve the exteriors of the eccentric shafts and the cycloidalwheel; the pin wheel housings sleeve the exteriors of the output plate racks; and the pin wheel housing sleeves are connected with the output plate racks through a pair of angular contact ball bearings. The RV reducer with the large reduction ratio has a three-stage reduction structure, large reduction ratio, a small starting torque, high starting efficiency, small vibration, a low noise, better smoothness, and high precision.

Description

technical field [0001] The invention relates to a reducer used in the fields of automation and robots, in particular to an RV reducer with a large reduction ratio. Background technique [0002] RV reducer is a new type of reducer developed on the basis of cycloidal pinwheel transmission. It has a two-stage reduction structure: the first stage is a planetary reduction structure, and the second stage is a cycloidal pinwheel reduction structure. It has the advantages of high rigidity, high precision, high torque and high transmission efficiency, and has smaller volume and greater overload capacity than simple cycloidal pin wheel planetary transmission. For example, Chinese patent CN104847873A discloses a fully-sealed integrated RV reducer, which includes a second-stage cycloidal pinwheel deceleration structure composed of a pintooth housing, a cycloidal wheel, and a needle roller, and a first-stage cycloidal pinwheel deceleration structure composed of an input shaft and a plane...

AI Technical Summary

Problems solved by technology

[0003] In the above prior art, the design of this structure has certain defects, such as figure 1 and figure 2 As shown, under normal circumstances, the reduction ratio of the RV reducer mainly changes with the first-stage planetary reduction mechanism, and the speed ratio between the planetary gear and the input shaft is fixed in a relatively small range. There are two reasons: 1. Planetary The maximum gear size should not exceed the maximum installation size of the reducer; 2. The maximum outer diameter of the input shaft should not be larger than the center hole of the reducer

It can be seen that this design structure, when the size of the reducer is constant, the value of the reduction ratio has certain limitations, and this structural design is difficult to obtain a large reduction ratio and a simple structure reducer

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