Machine tool table rotation device

Abstract

The present invention relates to an apparatus for rotating a table of a machining tool, and more particularly, to a structure for a table-rotating apparatus in which the abrasion of a gear for driving the table in rotation is reduced and gear backlash is minimized. The apparatus for rotating a table of a machining tool according to one embodiment of the present invention comprises: a table (100) on which a workpiece is fixed; an annular table-rotating gear (110) arranged beneath the table (100); a first connection gear unit (200) which contacts one side of the table-rotating gear (110) so as to rotate the table (100); a second connection gear unit (300) which contacts the other side of the table-rotating gear (110) so as to rotate the table (100); a first driving gear (400) which contacts the first connection gear unit (200) to transmit power; a second driving gear (500) which contacts the second connection gear unit (300) to transmit power; and a driving motor (600) connected to the first driving gear (400) and to the second driving gear (500).

Description

technical field [0001] The present invention relates to a table rotating device of a machine tool, and more particularly, to a structure of a table rotating device that reduces wear of gears that drive the table to rotate and minimizes backlash. Background technique [0002] In a machine tool, the worktable that fixes the workpiece not only moves forward, backward, left, and right, but also rotates on a plane, so that multiple surfaces of the raw material can be processed. It is also called a rotary table. [0003] refer to figure 1 and figure 2 , the above-mentioned table rotates on the plane, in order to obtain a high reduction ratio for the fine rotary motion of the table, generally a circular table rotating worm wheel (WORMWHEEL) is provided at the lower part, and the above-mentioned worm wheel is contacted from the outside The driving force is obtained from the worm (WORM), so that the table is rotated through the worm gear as a whole. [0004] When looking more clo...

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Problems solved by technology

[0005] The above-mentioned worm is generally made of steel, and the worm wheel is made of bronze or brass alloy, which is made of relatively weak materials. As shown in the figure, when the worm directly constitutes the output end that rotates the table, Applying a large load will increase the wear of the worm gear after long-term use, resulting in a decrease in the accuracy of the table rotation

[0006] In addition, in order to adjust and reduce the backlash of the worm gear, when the lead on the worm gear side is made of double leads, the processing cost increases. When the output end that rotates the table is made of a single worm gear, the worm and worm The size becomes larger, and there is a problem that the production cost increases

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