High-precision encoder installation connection structure

Abstract

The invention relates to a high-precision encoder installation connection structure. A transition shaft is arranged between an encoder ruling hub assembly and a measured shaft; the upper part of the transition shaft is of a flange structure and is provided with a short cylindrical boss; the end surface of the upper flange and the short cylindrical boss are in clearance fit with the lower end surface of the measured shaft and a hole in the measured shaft and are fixed by first screws; the middle of the transition shaft is provided with a smooth cylinder; a section of cylindrical thread is formed in the lower part of the transition shaft; a concentrated ball collar is arranged on the smooth cylinder in a sleeving mode; the encoder ruling hub assembly is arranged outside the concentrated ballcollar in a sleeving mode; an end surface circular boss of an encoder shell is in clearance fit with a cylindrical hole in the tail part of a main shaft box body and is fixed by second screws throughan end surface flange; and a locking nut is arranged below the encoder ruling hub assembly and is matched with the cylindrical thread in the lower part of the transition shaft. The transition shaft is arranged, the concentrated ball collar is arranged between the outer circle of the transition shaft and the hole in the encoder ruling hub assembly, and the magnitude of interference is controlled to meet the requirement of high coaxiality between the transition shaft and the measured shaft; and high installation coaxiality of 10<-3>mm can be realized.

Description

technical field [0001] The invention belongs to the technical field of high-precision encoder connection, in particular to a rigidly connected high-precision encoder installation and connection structure with an anti-backlash structure. Background technique [0002] Machine tool equipment, as a working machine, has always been highly valued by countries all over the world as a strategic industry. High-precision is the eternal theme of machine tool development. In addition to linear motion coordinate axes, CNC gear grinding machines, etc., also have rotary motion coordinate axes. In order to improve the rotation control accuracy of the rotary motion coordinate axes, in addition to improving the manufacturing accuracy of transmission parts, another measure is to use closed-loop control. One of the keys to closed-loop control is detection accuracy. At present, there are high-precision encoder products with more than tens of thousands of lines for closed-loop detection of rotar...

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Problems solved by technology

[0003] Aiming at the high coaxial position requirements of the current high-precision encoder, this invention proposes a rigid connection structure that can eliminate backlash, which effectively solves the problem of using and installing the high-precision encoder, thereby matching the detection accuracy of the high-precision encoder

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