Dual-drive dual-screw rod positioner

Abstract

The invention discloses a dual-drive dual-screw rod positioner in the technical field of mechanical engineering, which comprises a horizontal delivery mechanism, a pitching mechanism and a rotating mechanism, wherein the pitching mechanism is arranged on the horizontal delivery mechanism; and the rotating mechanism is arranged on the pitching mechanism. The horizontal delivery mechanism comprisesa stand, a sliding table, a horizontal screw rod and a horizontal screw rod motor, wherein the sliding table is arranged on the stand; one end of the horizontal screw rod is fixed on the stand and the other end of the horizontal screw rod is connected with the sliding table; the horizontal screw rod motor is connected with the horizontal screw rod; and the pitching mechanism is arranged on the sliding table. The pitching mechanism adopts a four-rod parallel mechanism, can realize the self-lock at any position and improve the bearing energy. The rotating mechanism adopts a parallel gear reducing mechanism driven by double motors, so that a drive workpiece has higher speed rate and larger tonnage at the same motor power; and the horizontal delivery mechanism is added, i.e. one degree of freedom is added, so that more complicated parts can be processed.

Description

technical field [0001] The invention relates to a device in the technical field of mechanical engineering, in particular to a double-drive double-screw positioner. Background technique [0002] In the processing of large and complex parts, the position of the part relative to the machine tool is often not fixed, but it needs to rotate with multiple degrees of freedom according to the different processing parts and molding requirements. The double-drive double-screw positioner is used to change the position of the processed parts when processing large and complex parts to meet specific processing needs. The dual-drive double-screw positioner is used in conjunction with CNC machine tools to increase the degree of freedom in processing and is an important equipment for multi-axis CNC machining. [0003] After searching the existing literature, it is found that the Chinese patent application number is: 200320104859.4, and the name is: large-scale component turning table. Cylin...

AI Technical Summary

Problems solved by technology

Although the function of this turning table is greatly improved compared with the former, it can realize the processing of parts at different positions and improve the degree of freedom of the processing equipment, but the structure of the pitching structural unit of this mechanism is complicated, and it is controlled by the crank on the base. Driving the upper workbench to turn over requires a large motor power and a complex power transmission system, which greatly reduces the stiffness of the entire mechanism

Since the mechanism adopts a crank rocker mechanism, although it can self-lock at the limit position, it cannot realize the self-locking mechanism at other positions. Moreover, the rotating part of the table is driven by a motor, which requires a high power of the motor. Small, the ability to operate the workpiece to be processed is weak

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