Research On Few Teeth Difference Five-ring Gear Reducer

The few teeth difference (FTD) five-ring gear reducer is a new type of transmission device developed on the basis of three-ring gear reducer theory. This article focuses on the current TRGR over-vibration problem caused by balanced inertia force and unbalanced inertia moment, puts forth and further makes theoretical and experimental research on FTD five-ring gear reducer as a solution based on the theory of plate structure.It analyzes the principle of TRGR transmission, establishes the few teeth inside engaged planetary gear mesh equation applying differential geometry and mesh theory, analyzes the stress on the drive gear, calculates and analyzes the stress on tooth ring flat-plate and input shaft, analyzes static and dynamic balance.The design use the technique of the few teeth inside engaged planetary gear under the slotting cutter treatment, which is, with the application of Newton iterative formula of few teeth difference inside engaged gear modification coefficient, the minimum engagement angle can be achieved as well as the modification coefficient between contact ratio and the interference coefficient of tooth profile which is consistent with the actual situation, and also analyzes the reducer's assembly condition and calculates the reducer's transmission efficiency which may guide the structural design.The finite element static and modal analysis on the key parts of internal tooth ring flat-plate, input axle and eccentric strap is made, which shows that they can meet the demand of intensity and vibration in design specification.The structural design, virtual assembly and intensity testing of the FTD five-ring gear reducer are made.The data collection and signal processing in the experiment on transmission performance and vibration are carried out by microcomputer. The experiment declares that the FTD five-ring gear reducer has a high efficiency on transmission and a much lower vibration compared with the old one.