Two-stage planet gear speed reducer

Abstract

The invention discloses a two-stage planet gear speed reducer. The two-stage planet gear speed reducer comprises an input flange, an inner gear ring connected with the input flange through a first screw and an output flange connected with the inner gear ring through a second screw. Only an input shaft is arranged in the inner gear ring through an input shaft bearing. One end of the input shaft stretches into the input flange. A first-stage sun gear shaft is arranged at the other end of the input shaft and provided with a first-stage sun gear. The first-stage sun gear is engaged with a plurality of first-stage planet gears. The first-stage planet gears are engaged with the inner gear ring. The first-stage planet gears are arranged on a first-stage planet gear pin shaft through first-stage crowded needle bearings in a rolling manner. The two ends of the first-stage planet gear pin shaft stretch out of the first-stage planet gears to be connected with a first-stage planet carrier. A second-stage sun gear shaft is arranged on the first-stage planet carrier.

Description

technical field [0001] The invention relates to a reducer, in particular to a two-stage planetary gear reducer. Background technique [0002] In addition to the planetary gears in the planetary reducer can rotate around their own axis of rotation like fixed shaft gears, their rotation axis also rotates around the axis of other gears (sun gear) with the planet carrier, and the rotation around its own axis It becomes rotation, and the rotation around the axis of other gears is called revolution, just like the planets in the solar system, hence the name. It can be used in the modern robot industry, such as parallel robots or linear robots, and is often used in the field of CNC machine tools and machining centers, with a wide range of applications. Most of the current planetary reducers adopt a single-stage planetary gear structure. The single-stage planetary gear structure has a small output torque, a small application range, poor structural performance, easy damage, and frequ...

AI Technical Summary

Problems solved by technology

Most of the current planetary reducers adopt a single-stage planetary gear structure. The single-stage planetary gear structure has a small output torque, a small application range, poor structural performance, easy damage, and frequent replacement. At the same time, the existing internal ring gear is generally a split gear. Ring structure, which is composed of a transition flange and a ring gear, so that the input shaft bearing can be assembled in the transition flange. When the split ring gear structure is assembled, there will be a gap at the flange connection, so the concentricity is relatively large, which is not conducive to The overall operation of the reducer, in addition, the existing input flange and output flange are connected to the inner ring gear by screws, the connection is not tight, the vibration is relatively large during the operation of the reducer, and it is easy to cause the The gap at the joint of the ring gear gradually increases, which eventually leads to misalignment of the gears of the reducer, causing the reducer to malfunction or even be scrapped

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