Worm gear

Abstract

The invention discloses a worm gear having adjustable gearing clearance. The worm gear comprises a gearbox, a worm wheel and a worm which are arranged in the gearbox and matched with each other, and a main shaft arranged in the worm wheel, wherein one end of the main shaft is movably arranged in a main eccentric sleeve, and the other end of the main shaft is movably arranged in a bearing eccentric sleeve matched with the main eccentric sleeve; and the main eccentric sleeve and the bearing eccentric sleeve are both arranged on the gearbox. The worm gear changes the axle distance between the main shaft and the worm by rotating the main eccentric sleeve and the corresponding bearing eccentric sleeve to compensate for the gearing clearance generated by the processing and assembling error of the worm wheel and the worm and perform clearance compensation on the abrasion caused in the process of pre-running and / or normal use so as to increase the contact area of the worm wheel and the worm, improve the load bearing capability and gearing precision of the worm wheel and greatly prolong the service life of the worm wheel and the worm.

Description

technical field [0001] The invention relates to a transmission device, in particular to a worm gear transmission device. Background technique [0002] As we all know, errors are unavoidable in the processing and assembly of worm gears and worms, which makes transmission gaps exist between worm gears and worms. In order to reduce the transmission gap as much as possible, the traditional solution is to improve the machining and assembly accuracy. However, this method will greatly increase the manufacturing cost of the worm gear, and, in most cases, the worm gear needs to be pre-combined, and the transmission gap will usually be increased after the reconciliation. However, if the transmission gap is too large, the contact area of ​​the worm gear will be reduced, the load bearing capacity of the worm gear will be reduced, the transmission accuracy of the worm gear will be greatly reduced, and its service life will be shortened. Contents of the invention [0003] The technica...

AI Technical Summary

Problems solved by technology

However, this method will greatly increase the production cost of the worm gear, and, in most cases, the worm gear needs to be run in advance, and the transmission gap will usually be increased after the run

However, if the transmission gap is too large, the contact area of ​​the worm gear will be reduced, the load bearing capacity of the worm gear will be reduced, the transmission accuracy of the worm gear will be greatly reduced, and its service life will be shortened.

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