Small planetary gear reducer with large transmission ratio

Abstract

The invention discloses a small planetary gear reducer with a large transmission ratio. The dear reducer comprises a box body. The periphery of the box body is provided with fixed inner gear. A sun wheel is arranged in the box body as the input end. Planet wheels are placed between the inner circular area and the outer circular area of the box body. The outer circulars of the planet wheels simultaneously mesh with sun wheel outer circle and an inner gear ring of the fixed inner gear. The planet wheels make the combined motion of rotation and revolution under the restrictions of both the sun wheel and the fixed inner gear. An output shaft has one side located in the box body. A floating inner gear is placed in the box body, and is arranged at one end of the output shaft. An inner gear ring of the floating inner gear meshes with the outer circle of the planet wheels. A planet carrier is located in the box body. One end of the planet carrier is coupled with one end of the output shaft by a first bearing, and the first bearing also supports the planet carrier to make the output shaft and the floating inner gear suspend, and plays a function of axial positioning. The planet carrier comprises a side plate. The side plate is connected with the planet wheels through planet wheel rotation shafts. The small planetary gear reducer with a large transmission ratio can reduce a transmission clearance to suit the situations of shock load and frequent positive inversion.

Description

Technical field [0001] The invention relates to the technical field of reduction gears for small transmission systems, in particular to a small planetary gear reducer with a large transmission ratio. Background technique [0002] Compared with ordinary gears, planetary gear reducers have many advantages such as small size, light weight, high carrying capacity, high transmission efficiency, high precision, wide reduction range, long service life, smooth operation, low noise, and coaxial input and output. , Is widely used in general industrial industries. [0003] NGWN planetary gear transmission has the characteristics of compact structure, large transmission ratio and high transmission efficiency. It is mainly used in mechanical transmission devices with short-term interruption. The NGWN (Ⅱ) type planetary transmission has a more compact structure and simpler manufacturing and installation than the NGWN (Ⅰ) type. The NGWN planetary gear reducer makes full use of the characteristi...

AI Technical Summary

Problems solved by technology

The fixed internal gear is often connected with the box or fixed flange by screw fastening, spline, etc., which has problems such as poor rigidity, large clearance, large residual stress during processing, and large heat treatment deformation.

The floating internal gear is usually connected to the output shaft with a gear coupling, which increases the structural complexity of the reducer, low space utilization, and difficult installation

The planet carrier of small power transmission mechanism can adopt single-wall type, but there are also problems such as low rigidity and clearance

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