High-precision rotary table of gapless connecting rod mechanism and capable of moving slightly

Abstract

The invention provides a high-precision rotary table of a gapless connecting rod mechanism and capable of moving slightly. The high-precision rotary table of the gapless connecting rod mechanism and capable of moving slightly comprises a driving motor, a motor supporting base, a rotary table body, a rotary table base, a base plate and the connecting rod mechanism, wherein the connecting rod mechanism comprises a bearing a, a crank, a connecting shaft a, a connecting rod, a bearing b, a connecting shaft b, an oscillating bar and a bearing c, the output torque of the motor is used as power for the rotation of the rotary table, the output shaft of the driving motor drives the crank to rotate, the crank drives the connecting shaft a installed on the crank and then the connecting rod is driven to swing, the connecting shaft b is driven to rotate through the swinging of the connecting rod, the oscillating bar is driven to swing through the rotation of the connecting shaft b, and then the rotary table body is driven to rotate, namely the torque of the motor is transmitted to the rotary table body through the crank, the connecting shaft a, the connecting rod, the connecting shaft b and the oscillating bar, and the rotary table body is driven to rotate within the range of a certain angle through the swinging of the oscillating. According to the high-precision rotary table of the gapless connecting rod mechanism and capable of moving slightly, due to the fact that a proper transmission ratio is configured and a high-precision angular contact ball bearing is pre-tightened, bearing clearance is eliminated and accuracy is improved.

Description

technical field [0001] The invention relates to a high-precision micro-motion turntable, in particular to a high-precision micro-motion turntable with a gapless link mechanism, and belongs to the technical field of micro-operation and micro-electromechanical technology. Background technique [0002] The high-precision micro-motion turntable is the executive component used to accurately adjust the attitude of the parts in the micro-assembly process. It generally has the characteristics of fast, high-precision, and small footprint. The performance of the turntable directly determines the assembly accuracy and assembly efficiency. [0003] According to the current research results of high-precision micro-motion turntables at home and abroad, the driving method of high-precision micro-motion turntables is mainly realized through the following two methods. One is the turntable driven by a worm gear structure. This kind of mechanical transmission This method is widely used. Howeve...

AI Technical Summary

Problems solved by technology

[0003] According to the current research results of high-precision micro-motion turntables at home and abroad, the driving method of high-precision micro-motion turntables is mainly realized through the following two methods. One is the turntable driven by a worm gear structure. This kind of mechanical transmission This method is widely used. However, when this feed method completes the motions of starting, accelerating, decelerating, and reversing, the elastic deformation, friction, and backlash will cause mechanical vibration of the system, slow motion response, and poor dynamic stiffness. and other nonlinear errors, so this type of turntable generally has low precision. In addition, this type of turntable is generally relatively large in size, which is not suitable for micro-operation and micro-assembly requirements; the other is a direct-drive turntable, which drives When the load is loaded, it does not need to pass through the transmission device (such as transmission belt, worm gear, etc.), due to the special structure of the motor, it can realize low-speed and high-torque output. The motor has good servo characteristics and dynamic characteristics, which can increase the acceleration of the turntable. The rotation speed is greatly improved

However, the direct-drive turntable has high manufacturing requirements and generally requires closed-loop control, so the cost is relatively high

[0004] Generally speaking, in recent years, great progress has been made in the research of micro-movement turntables at home and abroad, but there are few turntables for precise adjustment of poses and postures in the micro-assembly process, and high-precision turntables are mostly through a fully closed-loop method. Realization, higher requirements for control algorithm

Images