CN2474991Y

CN2474991Y - Photoelectric axial angle coder with intercalation structure

Info

Publication number: CN2474991Y
Application number: CN 01207547
Authority: CN
Inventors: 冯长有
Original assignee: Changchun Institute of Optics Fine Mechanics and Physics of CAS
Current assignee: Changchun Institute of Optics Fine Mechanics and Physics of CAS
Priority date: 2001-03-19
Filing date: 2001-03-19
Publication date: 2002-01-30
Anticipated expiration: 2011-03-19

Abstract

An embedded photoelectric axial angle coder changes the convention that a main shaft of the traditional shafting cooperates with an internal ring of an antifriction bearing and is arranged in the most inner section of the shafting, and innovatively designs the main shaft section into the structure which cooperates with an external ring of the antifriction bearing and a shaft sleeve is embedded into the internal ring of the antifriction bearing. Nuts are adjusted to adjust the lateral gap of the antifriction bearing to promote the rotating precision of the shafting. A code disc is arranged in the center of the antifriction bearing to reduce the effect of the shafting swaying errors on the precision of the code disc to one half of the original error. Simultaneously, the structure fully utilizes the radial space of the coder to greatly reduce the axial size, and the various and reasonable connections with the external set can satisfy the demands on certain special occasions.

Description

A kind of optical electric axial angle encoder of damascene structures

The utility model belongs to the brand-new photoelectric angular displacement sensor of a kind of structure---the optical electric axial angle encoder in the photoelectric sense technology field.

Before the utility model, at home and abroad in the photoelectric angular displacement sensor technical field, the photoelectric encoder that is adopted, self-contained version commonly used has the standard rolling bearing axis system and the non-standard axis of rolling to be.The prior art the most approaching with the utility model is the JX series optical electric axial angle encoder of Changchun Inst. of Optics and Fine Mechanics, Chinese Academy of Sciences's development and production.As shown in Figure 1: form by axis system (1,2,3,4), code-disc 5, frame of reference (6,7,8,9), ring flange 10, housing 11.Wherein axis system comprises main shaft 1, setting nut 2, standard rolling bearing 3, axle sleeve 4; Frame of reference comprises light-emitting component 6, reading slit 7, slit cover 8, receiving element 9.

This structure belongs to the series connection assembling mode, after each parts stack assembling, makes axial dimension strengthen, and scrambler physical dimension is very thick, and axial occupation space is bigger, is not suitable for some occasion harsh to the axial dimension requirement; The scrambler mounting means is that rotary main shaft linked to each other with measured axis by shaft coupling, is not suitable for the installation needs of some special occasions after ring flange was fixed.

In order to overcome above-mentioned shortcoming, the purpose of this utility model is to adopt special damascene structures form, make full use of the radial space of scrambler, reduce axial dimension, design the brand-new Embedded optical electric axial angle encoder of a kind of structure, with satisfy some to axial dimension requirement cross the requirement tight and specific occasion that connecting mode is special.

Detailed content of the present utility model is as shown in Figure 2: be made up of axis system (12,13,14,15), code-disc 16, frame of reference (17,18,19,20), ring flange 21, housing 22.

Axis system comprises: main shaft 12, rolling bearing 13, axle sleeve 14, setting nut 15; Frame of reference comprises: receiving element 17, read slit 18, light-emitting component 19, slit cover 20.

Axis system is that the axis of rotation with main shaft 12 is a symcenter, and axle sleeve 14 is embedded in the interior ring of rolling bearing 13, and the head bearing end face of rolling bearing 13 and the reference field of axle sleeve 14 are closely cooperated; The central axis of axle sleeve 14 overlaps with the axis of rotation of main shaft 12; Its outer part also adopts damascene structures, close and parallel code-disc 16; The outer shroud of the endoporus of main shaft 12 and rolling bearing 13 closely cooperates, the lower bearing end face of rolling bearing 13 and the datum end face of main shaft 12 closely cooperate, and setting nut 15 connects with axle sleeve 14 afterwards by screw thread and the lower bearing end face of rolling bearing 13 closely cooperates and the sideshake of scalable rolling bearing 13.

On the main shaft 12, approximately be positioned at upper and lower two bearing position intermediate of rolling bearing 13, be provided with outer reference field,, the workplace of code-disc 16 and the outer reference field of main shaft 12 are closely cooperated in order to install and fix code-disc 16.

In frame of reference, light-emitting component 19 is fixed on non-working surface one side of code-disc 16, receiving element 17, read slit 18, slit overlaps workplace one side that 20 threes are positioned at code-disc 16.Read slit 18 and be fixed on the slit cover 20, parallel with code-disc 16 and keep certain minim gap; Receiving element 17 is fixed on the opposite side of slit cover 20, in order to read code-disc 16 and to read the moire frange signal that slit 18 relative displacements are produced.

Ring flange 21 closely cooperates by the upper surface of seam and axle sleeve 14, and housing 22 connects with the face of cylinder of ring flange 21.

The optical electric axial angle encoder of this damascene structures can be worn axle or the outer of ring flange 21 connects with outside complete machine by the center pit of axle sleeve 14, and main shaft 12 connects with measured axis.

Structural principle explanation: the principal feature of damascene structures be this system changed main shaft in the traditional system cooperates with the rolling bearing endoporus and be positioned at axle be in partly convention, innovatively main shaft portion is designed to match with the outer shroud of rolling bearing, make the workplace of code-disc be positioned at the centre position of two rolling bearings, made full use of the radial space of scrambler, reduced axial dimension greatly, main shaft cooperates with the rolling bearing outer shroud and drives code-disc and rotates, axle sleeve then is embedded in the interior ring of rolling bearing, and adjust the sideshake of rolling bearing by setting nut, improve the rotating accuracy of axle system, after main shaft drives the code-disc rotation, with read slit and produce relative displacement, and the generation moire frange signal, be received element and receive.

Good effect of the present utility model: this embedded photoelectric shaft-position encoder because make full use of radial space, axial dimension reduces greatly, can satisfy some to axial dimension requirement cross tight and the special requirement of special occasion of connecting mode; Because the code-disc workplace is positioned at two bearing centre positions up and down of rolling bearing, make the drunkenness error of axle system be reduced to original 1/2 to the influence of code-disc precision, and various, reasonable with the connecting mode of outside complete machine, can be fit to some requirement of special occasion.

Description of drawings: Fig. 1 is the structural representation of prior art, and Fig. 2 is a structural representation of the present utility model, and Figure of abstract is also used Fig. 2.

Most preferred embodiment: the material of main shaft 12 and axle sleeve 14 adopts 45 ^#Steel, rolling bearing 13 adopts standard zanjon rolling ball bearing, code-disc 16 Kg optical glass, place on the outer reference field of main shaft 12 in upper and lower two bearing centre positions of rolling bearing 13, read slit 18 Kg optical glass, adopt rounded slot, receiving element 17 and light-emitting component 19 adopt international well-known producer---and the moral sharp envelope root or the product of Buddhist nun's Weir manufacturer production suddenly, the material of ring flange 21 and housing 22 adopts duralumin material Ly12.

Claims

1, a kind of optical electric axial angle encoder of damascene structures, be by axis system, code-disc, frame of reference, ring flange and housing are formed, it is characterized in that axis system is that axis of rotation with main shaft 12 is a symcenter, axle sleeve 14 is embedded in the interior ring of rolling bearing 13, the head bearing end face of rolling bearing 13 and the reference field of axle sleeve 14 are closely cooperated, the central axis of axle sleeve 14 overlaps with the axis of rotation of main shaft 12, its outer is partially embedded into close and parallel code-disc 16, the outer shroud of the endoporus of main shaft 12 and rolling bearing 13 closely cooperates, the lower bearing end face of rolling bearing 13 and the datum end face of main shaft 12 closely cooperate, setting nut 15 is closely regulated with the lower surface of rolling bearing 13 by screw thread and axle sleeve 14 connection backs and is cooperated, on the main shaft 12 approximately be positioned at rolling bearing 13 on, following two bearing position intermediate, be provided with outer reference field, closely cooperate with the workplace of code-disc 16, in frame of reference, light-emitting component 19 is fixed on non-working surface one side of code-disc 16, receiving element 17, reading slit 18, slit overlaps workplace one side that 20 threes are positioned at code-disc 16, reading slit 18 is fixed on the slit cover 20, parallel with code-disc 16 and keep certain minim gap, receiving element 17 is fixed on the opposite side of slit cover 20, ring flange 21 closely cooperates by the upper surface of seam and axle sleeve 14, and housing 22 connects with the face of cylinder of ring flange 21.

2, by the described a kind of embedded photoelectric shaft-position encoder of claim 1, it is characterized in that the outer of wearing axle or ring flange 21 by the center pit of axle sleeve 14 connects with outside complete machine, main shaft 12 connects with measured axis.