A lifting structure for the vertical shaft of a welding manipulator

Abstract

The invention provides a lifting structure of a welding manipulator vertical shaft and belongs to the technical field of welding. The technical problem that as the precision of an existing lifting structure of a welding manipulator vertical shaft is poor, the welding quality is low is solved. A welding manipulator comprises a lifting base; the vertical shaft vertically penetrates through the lifting base and can freely move vertically. The lifting structure of the welding manipulator vertical shaft comprises a motor, a worm and gear reduction box and a gear, wherein the worm and gear reduction box is fixed outside the lifting base; a rotary shaft is arranged inside the lifting base; the gear is fixed to the rotary shaft; one end of the rotary shaft is connected to the lifting base; the rotary shaft can rotate along the axis line of the rotary shaft; the other end of the rotary shaft penetrates out of the lifting base to be connected with an output shaft of the worm and gear reduction box; the motor is fixed to the worm and gear reduction box; the shaft face of the vertical shaft is fixedly provided with a rack engaged with the gear in the axial direction of the vertical shaft; gear teeth, engaged with the rack, of the gear keep abutting against the tooth faces of the corresponding upward teeth on the rack. The lifting structure of the welding manipulator vertical shaft has the advantage of improving the welding precision.

Description

technical field [0001] The invention belongs to the field of welding technology, and relates to a welding manipulator, in particular to a lifting structure of the vertical shaft of the welding manipulator. Background technique [0002] At present, in the production of products organized by enterprises, it is necessary to fixedly connect the connecting parts of some metal parts or metal plates, that is, weld them. Welding generally adopts manual welding, but manual welding has low efficiency and high cost, and cannot adapt to the assembly line production method. Therefore, automatic welding manipulators have emerged as the times require. Welding manipulators can be designed according to actual production needs and have high production efficiency. The advantages of stable welding quality. [0003] The welding manipulator generally has multiple degrees of freedom, and the free movement of the manipulator is realized through multiple rocker arms. The rocker arm at the end is co...

AI Technical Summary

Problems solved by technology

For example, the welding manipulator disclosed in the Chinese patent literature [authorized announcement number CN201371332Y], in this patent, the motor directly drives the gear to rotate, and the gear drives the vertical shaft to move up and down. This structure only controls the movement of the vertical shaft through the rotation of the motor, and the control accuracy is relatively poor. It is easy to lose steps in terms of control accuracy. The vertical shaft is stationary during welding, and the motor has no self-locking function. It needs to be powered on for a long time to keep the motor shaft of the motor in a non-rotating state. When the current fluctuates, the state of the motor will also be unstable. , which will cause the vertical shaft to move, which affects the quality of welding during welding; at the same time, the patented vertical shaft only guides the vertical shaft through a single-side guide rail, and the end of the vertical shaft will shake and shake during welding , affecting the welding quality; the rotating shaft used to connect the gears in this patent is a cantilever structure. As for the connection of the rotating shaft of the motor, the structural strength is low and the stability is poor, which leads to low transmission accuracy and affects the welding quality

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