Transmission device for rotary table

Abstract

The invention relates to a transmission device for a rotary table. The transmission device at least comprises a speed reducer, the speed reducer at least comprises a worm, the worm is composed of a first worm and a second worm, annular worm surface worm teeth arranged on the first worm and the second worm are in mirror symmetry about a central part of a butt joint position of the the first worm and the second worm, a first worm gear left tooth surface, which is substantially linearly changed, of the first worm can extend to a first worm gear right tooth surface, which is non-linearly changed, especially substantially raised, through a tooth crest which is substantially in a platform shape, so that at least one first worm gear right tooth surface is attached to a corresponding roller left tooth surface of a worm gear in a linear contact manner when playing a driving role, a second worm tooth right tooth surface, which is roughly linearly changed, of the second worm can extend to a second worm tooth left tooth surface, which is non-linearly changed, particularly roughly raised and convex, from the tooth crest which is roughly in a platform shape, and at least one second worm tooth left tooth surface is attached to the right tooth surface of the corresponding roller of the worm gear in a linear contact manner when playing a driving role.

Description

technical field [0001] The invention relates to the technical field of numerically controlled rotary worktables, in particular to a transmission device for a rotary table. Background technique [0002] CNC machine tools are often used for the production and processing of parts with complex shapes and structures, large batches, high precision requirements, and short-cycle production. CNC rotary table is a common component on CNC machine tools. CNC rotary table is mainly used for fixing or supporting plates. and box-type workpieces, and carry out continuous rotary processing and multi-face processing on them. The use of CNC rotary table can expand the manufacturability and shorten the processing time. It can be used for boring, straight line or plane machining of plate and box-type workpieces. Feed, indexing or reversing of processes such as milling or grinding. [0003] CN107414510B discloses a numerical control rotary table with adjustable transmission ratio. The technical...

AI Technical Summary

Problems solved by technology

[0006] Although the CNC rotary table provided by the above-mentioned prior art can be used for auxiliary processing of workpieces to a certain extent, there are still problems such as low control precision of the rotary table, serious wear between the teeth of the reducer, poor transmission efficiency of the reducer, Technical problems such as huge operating noise of the slewing device and weak bearing capacity of the slewing table

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