Non-return-difference machine tool rotating table

Abstract

The invention relates to the technical field of machine tool rotating tables, in particular to a non-return-difference machine tool rotating table. The rotating table comprises a box body, a rotatingtable body, a first transmission shaft, a second transmission shaft, a first gear, a second gear, a third gear, a center shaft, a center wheel, a fourth gear, a third transmission shaft and a planet gear; the first gear is arranged on the first transmission shaft; the second gear meshes with the first gear, and an inner gear ring is fixed on the inner wall of the second gear; the third gear is arranged on the second transmission shaft; the center wheel is rotatably arranged on the center shaft; the fourth gear is rotatably connected with the center wheel in a rotation stopping mode and mesheswith the third gear; the planet gear is arranged on the third transmission shaft in a rotation stopping mode; and the planet gear meshes with the center wheel and the inner gear ring at the same time.The rotating table has the beneficial effects that during use, the first transmission shaft and the second transmission shaft do not need to reversely rotate, the rotating direction and the rotatingspeed of the rotating table can be changed by adjusting the rotating speed, each gear rotates in only one direction, gear surfaces can be kept in contact all the time, the response is timely and rapid, no rotating gap exists, and when rotating and reverse rotating of the rotating table are alternatively performed, the rotating error is eliminated, and the rotating precision of the rotating table is improved.

Description

technical field [0001] The invention relates to the technical field of machine tool turntables, in particular to a backlash-free machine tool turntable. Background technique [0002] The precision turntable is the key component of the machine tool. The rotation accuracy of the turntable determines the overall performance of the machine tool and the precision of the machined parts. At present, the commonly used machine tool turntables include worm gear turntables, direct drive turntables, multi-stage gear drive turntables, etc. Among them, the worm gear of the worm gear turntables wears out quickly; although the direct drive motor turntables can achieve high precision, the cost of direct drive motors is relatively high. High, when the turntable moves at low speed, the torque is small; when the power input shaft of the multi-stage gear transmission turntable rotates forward or reverse to realize the reverse or forward rotation of the turntable, the multi-stage transmission gea...

AI Technical Summary

Problems solved by technology

At present, the commonly used machine tool turntables include worm gear turntables, direct drive turntables, multi-stage gear drive turntables, etc. Among them, the worm gear of the worm gear turntables wears out quickly; although the direct drive motor turntables can achieve high precision, the cost of direct drive motors is relatively high. High, when the turntable moves at low speed, the torque is small; when the power input shaft of the multi-stage gear transmission turntable rotates forward or reverse to realize the reverse or forward rotation of the turntable, the multi-stage transmission gear will also rotate forward or reverse , and due to the existence of transmission chain gaps, when the turntable rotates forward and reverse alternately, the rotation angle error reflected on the turntable will be relatively large, that is, there is a hysteresis

[0003] To sum up, the above-mentioned turntables either have fast wear, or there is a gyration gap, or they cannot realize motion transmission with a large reduction ratio, high manufacturing cost, and poor versatility. , high-precision turntable with large transmission ratio and no backlash has become an urgent need

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