Filtering drive device with high reliability and precision

Abstract

The invention discloses a filtering drive device with high reliability and precision, which comprises a drive motor and a reducer, wherein the reducer comprises an eccentric power input shaft, a duplicate gear, an internal fixing gear and an internal power output gear; the duplicate gear comprises an external gear I and an external gear II, and rotationally matched with and mounted on an eccentric section of the eccentric power input shaft in a sleeving manner; the internal fixing gear and the external gear I form a small tooth difference engagement pair I; the internal power output gear and the external gear II form a small tooth difference engagement pair II; and elastic grooving filtering structures are arranged in the small tooth difference engagement pair I and the small tooth difference engagement pair II, and comprise gear tooth grooves. Each gear tooth groove comprises two curved gear tooth grooves and a straight gear tooth groove, wherein the curved gear tooth grooves and gear outlines of gear teeth form equidistant curves respectively; and each straight gear tooth groove is formed between a tooth crest of each gear tooth and a joint of every two curved gear tooth grooves; and / or, the elastic grooving filtering structures comprise gear grooves which comprise straight gear grooves; the gear tooth grooves and the gear grooves are filled with elastomer; and the eccentric power input shaft and an output shaft of the drive motor rotate synchronously.

Description

technical field [0001] The invention belongs to the technical field of mechanical transmission, in particular to a high-reliability and precision filter driving device adopting the principle of meshing with few tooth differences. Background technique [0002] With the rapid development of engineering fields such as robotics, aviation, aerospace, and national defense weapons and equipment, new requirements have been put forward for the performance of transmission parts and systems such as transmission accuracy, reliability, small size, light weight, and maintenance-free. [0003] For a long time, the drive motor and the reducer in mechanical equipment have been designed separately, so it is inevitable to consider the connection design between them, and use keys, couplings and other connection devices, which makes the structure complicated and the number and types of parts increase, the reliability of the system will be reduced, the volume and weight will increase, and it will...

AI Technical Summary

Problems solved by technology

[0003] For a long time, the drive motor and the reducer in mechanical equipment have been designed separately, so it is inevitable to consider the connection design between them, and use keys, couplings and other connection devices, which makes the structure complicated and the number and types of parts increase, the reliability of the system decreases, the volume and weight increase, and cause shaft alignment errors, resulting in wear and tear of the transmission mechanism, and the mechanism is prone to jamming

[0004] On the other hand, as the power source of the transmission system, the form of the mechanical energy generated by the motor changes accordingly, from high speed and low torque at the input end to high torque and low speed at the output end, which inevitably leads to the rotation of the transmission system. Torque fluctuations; the manufacturing and assembly errors of each part; the impact of meshing and meshing when the gear teeth mesh; and the loss of parts during operation will increase the impact of vibration and noise during the operation of the transmission structure.

[0005] In addition, high Hertzian contact stress and bending stress during operation will seriously reduce gear life

Especially in extreme working conditions and special environments such as high and low temperature alternating, vibration and shock, due to the thermal deformation of the gear material and the coupling vibration with the external environment, the interference of the tooth profile will be caused, which will aggravate the wear and fatigue of the tooth surface, and even the tooth-to-gear The phenomenon of "stuck" or even "stuck" between them seriously affects the reliability of gear transmission

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