High-precision circular grating assembly device

Abstract

The invention provides a high-precision circular grating assembly device, and relates to the field of precision instruments. According to the invention, a grating base presses and fixes a rotary platform to be tested; an upper end cap is disposed on the upper part of the grating base and is fastened and connected to the grating base; the upper end cap is wider than the top part of the grating base; the center of the upper end cap is equipped with a lifting ring; a bearing is sleeved on the upper part of the grating base; a reading head turntable is sleeved on the exterior of the bearing; the upper part and the side part of the reading head turntable are covered with cover caps; the reading head turntable employs an oil lubricated ring sliding surface for axial positioning; the inner side of the reading head turntable is provided with a grating reading head; and the radial inner side of the grating reading head is provided with a grating reflection ring which is sleeved on a conical step of the central part of the grating base, wherein the grating reading head presents a non-contact state with the grating reflection ring in a radial opposite direction, and the grating reflection ring is of annular structure of metallic material and has good resistance to mechanical impact.

Description

Technical field [0001] The invention relates to the field of precision instruments, in particular to a high-precision circular grating assembly device. Background technique [0002] Traditional circular grating, a device used for high-resolution and high-precision rotation angle measurement is also called angle encoder. The integrated closed high-resolution angle encoder is expensive, such as the unit price of the RON800 series manufactured by HEIDENHAIN in Germany (including subdivision box) ) Up to more than 100,000 yuan, which is difficult to accept in general applications; grating engraved code discs are generally quartz glass transmissive, poor pollution resistance and impact resistance, and are not suitable for frequent adjustments and harsh and complex use environments . The price of modular separated circular grating is relatively low, but the installation technology requirements are high. If it is used in an independent angle signal acquisition system that can be instal...

AI Technical Summary

Problems solved by technology

[0002] Traditional circular grating, a device for high-resolution and high-precision rotation angle measurement is also called an angle encoder. The integrated closed high-resolution angle encoder is expensive, such as the unit price of the RON800 series manufactured by HEIDENHAIN in Germany (including subdivision box ) is as high as more than 100,000 yuan, which is unacceptable for general applications; the grating and engraved code disc is generally of quartz glass transmission type, which has poor pollution resistance and impact resistance, and is not suitable for harsh and complex environments that require frequent adjustments.

The price of the modular separated circular grating is relatively low, but the technical requirements for installation are relatively high. If it is used in an independent angle signal acquisition system for movable installation, due to the wide variety of user environments, the circular grating module manufacturer does not have a specific complete solution.

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