Planetary gear transmission device and assembly method thereof

Abstract

The invention belongs to the technical field of planetary gear transmission, particularly relates to a precise planetary gear transmission device with small back clearance, low no-load torque and large rigidity and an assembly method thereof, and the planetary gear transmission device is widely used for actuating mechanisms of various servo drive systems. The planetary gear transmission device disclosed by the invention adopts an eccentric planetary gear shaft structure which does not rotate with planetary gears, and eccentric planetary gear shafts are rotated so that the planetary gears are close to an inner gear ring, therefore, the tooth gaps of the planetary gears and the inner gear ring are reduced. The assembly method of the planetary gear transmission device comprises the following steps of: consistently rotating the eccentric planetary gear shafts so that the planetary gears are close to the inner gear ring; after the gear backlashes of the inner gear ring and the planetary gears are regulated, measuring and calculating the appropriate tooth thickness of a sun gear by using a special tool; and then grinding an appropriate sun gear in a matching way. The integral planetary line gear can obtain the smallest backlashes, the low no-load torque and the large rigidity under the condition of no clamping or previous tightening through the measures.

Description

technical field [0001] The invention belongs to the technical field of planetary gear transmission, and relates to a precision planetary gear transmission device with small backlash, low no-load moment and high rigidity, which is widely used in actuators of various servo drive systems. Background technique [0002] At present, the known servo system precision planetary transmission device adopts high-precision, modulus <1 micro-tooth interference pre-tightening assembly to reduce the transmission clearance. While obtaining a small backlash, the no-load friction torque is large and the stiffness is low. , Each gear must be matched, the production efficiency is low, and the cost of high-precision gears and structural parts is high. Large no-load friction torque will cause low-speed crawling of the weapon stabilization system, tiny teeth will cause poor ability to resist instantaneous impact, and low stiffness will reduce the performance of the servo drive system. [0003] ...

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a planetary gear transmission and its assembly method. The planetary gear transmission and its assembly method adopt a set of special clearance adjustment mechanism, which can obtain a very small gap when the machining accuracy of the gearbox is not high. The transmission backlash adapts to the current level of mechanical processing in my country and effectively reduces the cost; it can also reduce the transmission clearance without the use of small teeth with a modulus <1 for interference and tightening, and obtains a very low no-load friction torque And great rigidity, at the same time obtain excellent ability to resist instantaneous impact, effectively avoid the low-speed crawling of the servo drive system, improve the stability and prolong the service life

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