Accurate rotation mechanism

Abstract

The invention provides an accurate rotation mechanism and belongs to the technical field of a rotation mechanism. A ball screw pair-screw rod and a ball screw pair-nut are in rotary connection; a bearing II is arranged on the upper portion of a support; a bearing pre-tension disc spring is arranged between the bearing II and the ball screw pair-screw rod; one end of a rotary arm is abutted against one side of the ball screw pair-nut; the other end of the rotary arm is connected with one end of a rotary shaft; a bearing I is installed at the other end of the rotary shaft; one end of a tension spring is connected with the support; the other end of the tension spring is connected with the rotary arm. According to the accurate rotation mechanism, the rotary shaft is erected by the two high-accuracy bearings, the operation is stable, the rotation torque is small, the rotation accuracy is high, and the high-accuracy bearings control influences from circumferential bounce and axial bounce, a high-accuracy straight line ball screw is free of axial clearance displacement, the installation clearance between the ball screw pair and the two high-accuracy bearings is eliminated through a plurality of groups of bearing pre-tension disc springs, and the installation requirement of the disc springs is that the ball screw pair after pre-tension is free of axial transmission clearance.

Description

technical field [0001] The invention relates to a precise rotating mechanism and belongs to the technical field of rotating mechanisms. Background technique [0002] At present, angle rotation mechanisms are usually divided into manual rotation mechanisms and electric rotation mechanisms. The manual rotation mechanism is not suitable for the development of modern instrument automation. The electric rotating mechanism generally adopts a worm gear structure. Although the rotation angle is large, the accuracy of the rotation angle cannot meet the requirements due to the problem of meshing clearance and wear. Contents of the invention [0003] The purpose of the present invention is to solve the above existing problems in the prior art, that is, the electric rotating mechanism generally adopts a worm gear structure. Although the rotation angle is large, the accuracy of the rotation angle cannot meet the requirements due to the meshing gap and wear problems. And then provide...

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Problems solved by technology

[0003] The purpose of the present invention is to solve the problems existing in the above-mentioned prior art, that is, the electric rotating mechanism generally adopts a worm gear structure. Although the rotation angle is large, the accuracy of the rotation angle cannot meet the requirements due to the problem of meshing clearance and wear.

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