A planetary gear reducer

Abstract

The invention provides a planet gear reducer, belongs to the technical field of machinery, and solves the problem that transmission precision of the existing planet gear reducer is reduced due to abrasion of the planet gear reducer after long-term operation. The planet gear reducer comprises an output planet carrier, an inner gear ring, a sun gear A, a sun gear B and a plurality sets of planet gear structures. Each set of planet gear structure comprises a planet gear shaft, a planet gear A and a planet gear B. The sun gear A and the sun gear B are provided with a spline A and a spline B respectively. Both the spline A and the spline B are provided with a plurality of connecting ends. A gap is reserved between each two adjacent connecting ends. Each connecting end is provided with a helical surface with a helical angle alpha. The sun gear A is provided with a first inner hole. A pressure spring is mounted in the first inner hole. The planet gear reducer is capable of compensating abrasion so as to improve transmission precision.

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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