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A Precision Turntable Bearing with Absolute Position Detection Function

A technology of absolute position and turntable bearings, applied in the direction of electric/magnetic position measurement, bearings, bearing assembly, etc., can solve the problems of dependence on imports, poor workmanship, long delivery cycle, etc., and achieve the resolution of accuracy and signal output format Effect

Active Publication Date: 2018-01-23
CHONGQING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantages of this technology are: ① my country is not yet able to produce, and only depends on imports
② The delivery period is long (more than 16 weeks) and is subject to human constraints
③It is very difficult to install. The ring-shaped three-layer steel belt (base layer, steel grid, and protective layer) should be placed on the outer circle of the bearing together. A little tightness, a little deviation or a little roundness will cause great errors. So the workmanship is not good
④The price is still expensive

Method used

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  • A Precision Turntable Bearing with Absolute Position Detection Function
  • A Precision Turntable Bearing with Absolute Position Detection Function
  • A Precision Turntable Bearing with Absolute Position Detection Function

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Experimental program
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Embodiment Construction

[0019] Further illustrate structure of the present invention below in conjunction with accompanying drawing:

[0020] see figure 1 , Precision turntable bearings generally include a bearing race 1, a shaft ring 2 and a shaft ring end cover 3. The present invention utilizes the characteristic that the shaft ring end cover 3 is a part of the bearing itself, borrows it as a part of the sensor, and avoids the problems of secondary installation.

[0021] see figure 2 , the present invention processes two upper and lower rings of the gear grid 4 on the outer circumference of the end cover 3 of the bearing shaft ring, and the difference between the two rings of the gear grid is 1 tooth. The gear grid is a gear grid-shaped equally divided magnetic conductor formed directly on the end cover of the bearing shaft ring. The two rings of gear racks can be engraved by mechanical processing methods, such as rolling, inserting, milling, grinding, wire cutting, laser processing and the lik...

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Abstract

The present invention proposes a precision turntable bearing with an absolute position detection function. It uses a mechanical processing method on the bearing of the bearing shaft end cover.For 1, install one or multiple measuring heads on the bearing circle. Each measured head is divided into two layers of the upper and lower layers, which is aligned with the upper and lower tooth grids of the axis.In the junior coil of the head measurement, the transformer current is used, and the secondary coil will obtain an intercourse signal of cross -change.When the axis and rings of the bearings have a relative displacement, the processing system integrates the electrical signal output of the header output and converts to absolute location information.This precision transfer bearing can avoid secondary installation and improve the detection accuracy.

Description

technical field [0001] The invention belongs to the field of precision functional components in the high-end equipment manufacturing industry, and specifically relates to the position measurement technology of precision turntable bearings. technical background [0002] Precision turntable bearings are mainly used in the rotary parts of high-end equipment such as CNC machine tools, machining centers, radars, and weapon systems. They are required to have strong bearing capacity and high rotary accuracy. With the increasing development of digital and intelligent measurement and control technology, the requirements for position measurement and control are put forward for almost every rotary axis of these equipments. The conventional method is to install an independent position sensor (grating, magnetic grid, induction synchronizer, etc.) with each independent bearing unit. However, in many occasions, due to the constraints of space size, structure, weight, cost and other condit...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16C41/00G01B7/00
CPCF16C41/00F16C2233/00G01B7/003
Inventor 彭东林汤其富陈锡侯武亮王阳阳
Owner CHONGQING UNIV OF TECH