Elastic planetary friction drive device

Abstract

The invention relates to the field of speed reducer structures, in particular to an elastic planetary friction drive device which can eliminate drive clearances and improve drive precision. The elastic planetary friction drive device includes a casing, a sun gear, a planet carrier and a planet gear, wherein a friction ring is disposed in in the casing; the friction ring, the planet gear and the sun gear are successively in friction drive connection; the sun gear is connected to an input shaft; the planet gear is disposed on the planet carrier; the planet carrier is connected to an output shaft; a radial floating device is arranged between the planet gear and the planet carrier. The friction drive mode can eliminate a return clearance and improve drive efficiency. The radial floating devicecan ensure that all places in a transmission chain are radially compressed by floating the planet carrier in the radial direction after the drive device is installed, so that no clearance can be generated.

Description

technical field [0001] The invention relates to the field of reducer structure, in particular to an elastic planetary friction transmission device. Background technique [0002] Precision transmission devices are the foundation of high-end equipment, and the development of precision transmission technology will inevitably drive the progress of high-end manufacturing. In the high-end manufacturing industry, high-end CNC machine tools (especially related equipment used in the production of aerospace equipment) put forward higher technical requirements for precision rotary transmission. The precision rotary motion of traditional high-end CNC machine tools is mainly driven by direct drive motors, which can realize backlash-free and high-position transmission. However, in the case of the same cutting force, in order to ensure that the accuracy of the rotary axis of the machine tool does not change, the direct drive motor drive has the disadvantages of large volume and high energ...

AI Technical Summary

Problems solved by technology

However, in the case of the same cutting force, in order to ensure that the accuracy of the rotary axis of the machine tool does not change, the direct drive motor drive has the disadvantages of large volume and high energy consumption compared with the mechanical transmission drive, which is not conducive to the miniaturization of the machine tool and the synchronization of multiple spindles. The development of processing direction, especially the industrial production of small and precise parts with complex curved surfaces like aircraft engine blades, long processing cycle and low pass rate; the development of multi-spindle synchronous processing technology will be a technological change in this industry. Therefore, in the current development of multi-spindle synchronous processing machine tools, there is a lack of a small-volume, high-precision transmission device

Images