Planetary gear reducer

Abstract

The invention provides a planet-gear speed reducer and belongs to the technical field of machines. The problems that an existing planet-gear speed reducer works for a long time, the speed reducer is abraded, so that the transmission accuracy is reduced are solved. The planet-gear speed reducer comprises an output planet carrier, an inner gear ring, a sun gear A, a sun gear B and a plurality groups of planetary gear structures, each group of the planetary gear structures comprise a planetary gear shaft, a planetary gear A and a planetary gear B, a spline A and a spline B are respectively arranged the sun gear A and the sun gear B, a plurality of adjacent connecting ends among which gaps exist are arranged on the spline A and the spline B, a spiral surface which is provided with a helical angle a is arranged on each of the connecting ends, the spline B is located in an inner cavity of the output planet carrier, and a sliding sleeve pressure spring device is arranged between the spline B and the wall of the inner cavity of the output planet carrier. The planet-gear speed reducer has the advantages that abrasion can be compensated, so that the transmission accuracy can be improved.

Description

technical field [0001] The invention belongs to the technical field of machinery and relates to a planetary gear reducer. Background technique [0002] With the continuous development and progress of science and technology and the popularization of CNC machine tools, the requirements for the precision of reducers are also getting higher and higher. At present, to improve the precision of the reducer, it is generally to process high-precision parts first and then install these high-precision parts to form a high-precision reducer, which is divided into "ultra-precision arm gap, precision arm gap, and standard arm gap". However, there are still some problems in this method of improving the precision of the reducer: first, the precision requirements of the parts are high, the processing is very difficult, and the processing cost is also high; the second is that even if the processed high-precision parts are assembled into a high-precision machine, but the high-precision parts ...

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Problems solved by technology

However, there are still some problems in this method of improving the precision of the reducer: first, the precision requirements of the parts are high, the processing is very difficult, and the processing cost is also high; the second is that even if the processed high-precision parts are assembled into a high-precision machine, but these high-precision parts will wear out after long-term use, which will still reduce the accuracy, resulting in a reduction in the operating accuracy of the entire reducer

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