Rotary positioning device for automobile production line

Abstract

The invention discloses a rotary positioning device for an automobile production line, and belongs to the technical field of automobile production line rotary tables. The rotary positioning device comprises a rotary table body, wherein a rotary table top of the rotary table body is connected with an external driving motor through a cam mechanism, a clamp table for positioning a workpiece is mounted on the rotary table body, a rotation limiting unit is arranged on one side of the clamp table, and a sensing unit enabling the rotation limiting unit to generate a limiting signal is arranged on the clamp table. The rotary positioning device has the beneficial effects that the rotary positioning device is high in rotation precision and can stop at any position, the bearing capacity is improved, potential safety hazards caused by rotation over-travel to a cable are avoided, a unified reference is provided for zero calibration of the rotary table top, and it is guaranteed that the workpiece can be rotated to a set position.

Description

technical field [0001] The invention relates to the technical field of turntables for automobile production lines, in particular to a rotary positioning device for automobile production lines. Background technique [0002] In the welding process of the automobile body, it is necessary to use the fixture turning device to drive the fixture and the workpiece clamped on the fixture to rotate to realize the adjustment of the welding position. The existing fixture turntable has the following disadvantages: First, the rotation of the existing turntable is generally driven by a worm gear, but the way of driving the worm gear makes the rotation accuracy of the entire turntable not meet the requirements, and the overturning moment that the turntable can withstand Small, poor load-bearing performance; second, because the cables in the traditional turntable are arranged around the turntable, the cables will be entangled when the turntable rotates, and if the turntable rotates more than...

AI Technical Summary

Problems solved by technology

The existing fixture turntable has the following disadvantages: First, the rotation of the existing turntable is generally driven by a worm gear, but the way of driving the worm gear makes the rotation accuracy of the entire turntable not meet the requirements, and the overturning moment that the turntable can withstand Small, poor load-bearing performance; second, because the cables in the traditional turntable are arranged around the turntable, the cables will be entangled when the turntable rotates, and if the turntable rotates more than one turn, the cables will be wound Tight, under long-term rotation, the cable is prone to disengagement or breakage, which affects normal production; third, the current turntable cannot be zeroed and returned to its original position after maintenance or replacement of the motor because there is no zeroing reference. Unable to accurately detect the rotation angle of the workpiece

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