Precision high speed chief axis power transmission connecting mechanism

Abstract

The invention relates to a precise high-speed main shaft power drive connecting device; wherein a coupling (3) is the coupling with elastic spider, the interior of a machine tool main shaft is provided with a coaxial conical self-locking transition shaft, and one end of the coupling (3) is connected with a motor output end (2) and the other end is connected with the conical self-locking transition shaft; the conical self-locking transition shaft comprises a cylinder section (4) connected with the coupling and a self-locking conical cylinder section (4') with the diameter greater than that of the cylinder section and is matched with the inner wall of the machine tool main shaft, and the conicity of a conical surface (A) of the conical cylinder section (4') is 1:50 to 110. The invention can facilitate the power drive reliable, efficient and stable under the high rotation speed, and can effectively reduce the shock produced by the power drive.

Description

technical field [0001] The invention belongs to the technical field of the power transmission device structure of the spindle system of a high-speed precision machine tool. Background technique [0002] Precision high-speed machine tools work at a speed of more than 10,000r / min. While transmitting the motor power to the spindle system smoothly, in order to ensure the high precision requirements of the machine tool, it is necessary to avoid the vibration generated when the power is transmitted as much as possible. There are three main transmission modes of the existing power transmission device. One is to transmit power with a high-speed V-belt, which will generate a lot of vibration when the rotating speed is high. The second is to use the electric spindle structure to transmit power, because the cantilever at the tail of the spindle is too long, the rigidity is weak, and it is easy to vibrate. In addition, the high-speed motor manufacturing and assembly precision requiremen...

AI Technical Summary

Problems solved by technology

The second is to use the electric spindle structure to transmit power, because the cantilever at the tail of the spindle is too long, the rigidity is weak, and it is easy to vibrate. In addition, the high-speed motor manufacturing and assembly precision requirements will bring great difficulties to the spindle system manufacturing and assembly.

The third is to use double bonds to transmit power, which will produce obvious double bond shock vibration phenomenon at high speed

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