Planetary gear elastic anti-backlash reducer

Abstract

The invention relates to the field of precision transmission, in particular to a planetary gear elastic anti-backlash reducer which is capable of eliminating transmission clearance and improving transmission accuracy. According to the planetary gear elastic anti-backlash reducer, a planetary shaft is provided with two sets of planetary gears; gear rings comprise a fixed gear ring and a floating gear ring; the fixed gear ring and the floating gear ring are engaged with different planetary gears respectively; and the floating gear ring is mounted in a housing with clearance and connected with afloating adjustment device. The two sets of gear rings are adopted to mesh with the two sets of planetary gears, and the floating adjustment device is used for changing the position of the floating gear ring, so that a deflection angle between the floating gear ring and the fixed gear ring is caused, thereby driving the two sets of planetary gears to deflect so as to contact and mesh with different sides of upper teeth of a sun gear respectively, eliminating gaps in a transmission chain and improving the transmission accuracy.

Description

technical field [0001] The invention relates to the field of precision transmission, in particular to a planetary gear elastic anti-backlash reducer. Background technique [0002] In the process of the development of CNC machine tools, higher and higher requirements are put forward for the high-speed and green machine tools. To realize the high-speed and green production of machine tools, in addition to high-speed machining, the number of spindles can also be increased to achieve the array of machine tools. The structure and operation mode of arrayed machine tools are close to those of single-spindle machine tools, with high processing flexibility, and can change product batches in a short period of time, which meets the current needs of component manufacturers. The rotary table of the array machine tool is required to have the characteristics of small size, high precision and large torque. The commonly used worm gear drive and direct drive cannot meet all the technical re...

AI Technical Summary

Problems solved by technology

The commonly used worm gear drive and direct drive cannot meet all the technical requirements of the arrayed rotary table at the same time, which restricts the development of the array machine tool in the direction of miniaturization of the spindle spacing and expansion of the array scale

Although the traditional planetary reducer can meet the volume requirements of the arrayed turntable, the return error of the reducer is relatively large, which cannot meet the high-precision development requirements of the rotary table

Therefore, there is currently a lack of a machine tool reducer that takes into account both the volume and precision of the turntable.

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