CN100464160C

CN100464160C - Absolute compound axis photoelectric shaft-position encoder

Info

Publication number: CN100464160C
Application number: CNB2006100165160A
Authority: CN
Inventors: 赵波; 刘长顺; 王恒坤
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: 2006-01-12
Filing date: 2006-01-12
Publication date: 2009-02-25
Anticipated expiration: 2026-01-12
Also published as: CN101000250A

Abstract

The invention relates to absolute type compound shafting optical electric axial angle encoder. Its technique scheme is as follow: it includes flanged disc, body case, compound shafting, and reading head; the principal axis is set at the symmetry center of the encoder; axial sleeve is sleeved on the principal axis; and they are connected by bearing; the outer of the axial sleeve is sleeved on the flange hollow axle connected with the flanged disc by the same center; lock nut is set between lower end of the axial sleeve and the flange hollow axle; body case is sleeved on the reading head and compound shafting; lower end is connected with the flanged disc by bolt. While installing the encoder and main instrument, their 'O' location can realize once superposition positioning.

Description

A kind of absolute type composite shaft system optical electric axial angle encoder

One. technical field

The invention belongs to a kind of scrambler that relates in the photoelectric measurement technical field.

Two. background technology

Optical electric axial angle encoder is a kind of representative measurement of angle sensor, has been widely used in technical fields such as industry, aeronautical and space technology, scientific experimentation.Usually optical electric axial angle encoder mostly is single system, and the technology of processing and manufacturing is comparative maturity also.The prior art the most approaching with the present invention is Changchun Institute of Optics, Fine Mechanics and Physics, CAS's development product.As shown in Figure 1, comprise ring flange 1, housing 2, axle system and read head.Mainly comprise main shaft 3, bearing 4, axle sleeve 5 in its center shafting; Mainly comprise code-disc 6, substrate 7, slit 8, light-emitting component 9, receiving element 10 in the read head.

Main shaft 3 is positioned at the symcenter position of scrambler, and its end stretches out the center pit of ring flange 1, rotates contact by bearing 4 between main shaft 3 and the axle sleeve 5, code-disc 6 is sleeved on the shoulder of main shaft 3, be connected with screw, rotate, be connected with screw between axle sleeve 5 and the ring flange 1 with main shaft 3; Light-emitting component 9 in the read head is installed on the support that is connected with axle sleeve 5, be positioned at code-disc 6 below, substrate 7 by screw retention on axle sleeve 5, be positioned at code-disc 6 above, receiving element 10 is installed at place with holes at substrate 7, and light-emitting component 9 and receiving element 10 are positioned on the logical light light path of read head.When main shaft 3 drives code-disc 6 rotations and between the slit 8, produce relative motion.When light passed through code-disc code channel and slit, the data recording that read head reads the angular displacement data of testee.

This optical electric axial angle encoder is transferred " 0 " very difficulty when being connected with the main body instrument.

Any measurement all has certain basic point, i.e. " 0 " point." 0 " point of instrument itself does not overlap with " 0 " point of volume coordinate, and both residual quantity are called " 0 " potential difference." 0 " potential difference should be limited in certain scope in measuring process, scrambler should make scrambler " 0 " position itself overlap with main body instrument self " 0 " position when the main body instrument is installed, need repeated disassembled and assembled regular coding device for reaching this purpose, waste time and energy, very difficult.

Three, summary of the invention

In order to overcome the defective that prior art exists, the objective of the invention is to make scrambler on the main body instrument, one-time-reach-place to be installed, need not the secondary fixed disassembly, find that the two " 0 " position does not overlap, only need fine motion fine setting axle system promptly adjustable " 0 ", a kind of composite shaft system scrambler of ad hoc meter.

The technical problem to be solved in the present invention is: a kind of absolute type composite shaft system optical electric axial angle encoder is provided.The technical scheme of technical solution problem is as shown in Figure 2: comprise housing 11, ring flange 12, axle system, read head.Comprise flange tubular shaft 13, set nut 14, main shaft 15, bearing 16, resilient ring 17, axle sleeve 18 in its center shafting; Comprise encoder basement 19, bracing frame 20, receiving lines plate 21, receiving tube 22, slit plate 23, luminotron 24, circuit board 25, substrate 26, code-disc 27 in the read head.

Main shaft 15 is positioned at the symcenter position of scrambler in axle system, in the upper end of main shaft 15 encoder basement 19 is housed, and is connected by threaded engagement between the two, below encoder basement 19, axle sleeve 18 is sleeved on the main shaft 15, it with main shaft 15 between rotate by bearing 16 and contact the formation axis system; At the outside of axle sleeve 18 suit flange tubular shaft 13, the lower end of flange tubular shaft 13 and ring flange 12 concentric being connected, in fact they are integral pieces, be to rotate to contact between axle sleeve 18 and the flange tubular shaft 13, gap between the lower end hydraucone of the lower end of axle sleeve 18 and flange tubular shaft 13, be set with resilient ring 17 on the axle sleeve 18, set nut 14 is housed below resilient ring 17, between the external diameter of set nut 14 and axle sleeve 18 lower ends is threaded engagement, but locking axle sleeve 18 and flange tubular shaft 13.Axle sleeve 18 and ring flange 12, flange tubular shaft 13, set nut 14 have constituted fine setting axle system; The combination of main shaft system and fine setting axle system has formed composite shaft system; Have " 0 " mark on the ring flange 12 of fine setting axle system, " 0 " position mark of this mark and main body instrument self should overlap.

Code-disc 27 is contained on the encoder basement 19 in read head, both are connected, code-disc 27 rotates with main shaft 15, in the upper end of main shaft 15 substrate 26 is housed, the workplace of substrate 26 is vertical with main shaft 15, it is connected on the axle sleeve 18 by screw, at the place with holes of substrate 26 luminotron 24 and circuit board 25 are housed, bracing frame 20 is equipped with in extending area in axle sleeve 18 upper ends, slit plate 23 is equipped with in the upper surface of bracing frame 20, slit plate 23 be positioned at it above code-disc 27 both are parallel, and maintenance certain clearance, the lower surface of bracing frame 20 are equipped with receiving lines plate 21 and receiving tube 22, and luminotron 24 and receiving tube 22 are positioned on the logical light light path of read head, when main shaft 15 drives code-disc 27 rotations, slit plate 23 is motionless relatively, produces relative displacement between the two, when light passes through code-disc code channel and slit, read head has signal output, record angle of entry displacement data; Housing 11 is with on axle system and the reading head-shield, and the lower end is dropped on the shoulder of ring flange 12, is connected with screw and ring flange 12.

Good effect of the present invention: " 0 " position that the fine setting axle system in the axle system can adjust the locking scrambler overlaps with " 0 " position of main body instrument.Solved in the prior art scrambler in main body instrument installation process, the problem of repeated disassembled and assembled adjustment " 0 " position, time saving and energy saving, improved work efficiency greatly.

Four, description of drawings

Fig. 1 is that the single axle of prior art absolute type is the structural representation of optical electric axial angle encoder;

Fig. 2 is the structural representation of absolute type composite shaft system optical electric axial angle encoder of the present invention;

Fig. 3 is the circuit theory diagrams of circuit board 25 in the scrambler of the present invention;

Fig. 4 is the circuit theory diagrams of receiving lines plate 21 in the scrambler of the present invention.

Five, embodiment

The present invention implements by structure shown in Figure 2.Wherein the material of parts such as ring flange 12, flange tubular shaft 13, set nut 14, main shaft 15, axle sleeve 18, encoder basement 19, bracing frame 20 adopts bearing steel Gr15; Ring flange 12 and flange tubular shaft 13 are made of one part; The material of housing 11 adopts 2A12; Bearing 16 adopts C level or D grade standard deep groove ball bearing; The material of resilient ring 17 adopts 65Mn; Receiving tube 22 adopts triode, and luminotron 24 adopts infrared diode, and they all adopt the Honeywell product; The material of slit plate 23 and code-disc 27 adopts K9 optical glass or macromolecule resin material, and the tolerance fit of each part requires to set by angle measurement accuracy in the slit distribution on the slit plate 23 and code channel layout on the code-disc 27 and the axle system.

Claims

1. an absolute type composite shaft system optical electric axial angle encoder comprises housing, ring flange, axle system, read head, it is characterized in that also comprising flange tubular shaft (13), set nut (14), resilient ring (17) in the axle system; Main shaft (15) is positioned at the symcenter position of scrambler in axle system, in the upper end of main shaft (15) encoder basement (19) is housed, be connected by threaded engagement between the two, below encoder basement (19), axle sleeve (18) is sleeved on the main shaft (15), it with main shaft (15) between rotate by bearing (16) and contact the formation axis system; At the outside of axle sleeve (18) suit flange tubular shaft (13), the lower end of flange tubular shaft (13) and concentric being connected of ring flange (12), be to rotate to contact between axle sleeve (18) and the flange tubular shaft (13), gap between the lower end hydraucone of the lower end of axle sleeve (18) and flange tubular shaft (13), be set with resilient ring (17) on the axle sleeve (18), set nut (14) is housed below resilient ring (17), between the external diameter of set nut (14) and axle sleeve (18) lower end is threaded engagement, axle sleeve (18) and ring flange (12), flange tubular shaft (13), set nut (14) has constituted fine setting axle system; The combination of main shaft system and fine setting axle system has formed composite shaft system; Have " 0 " mark on the ring flange (12) of fine setting axle system, " 0 " position mark of this mark and main body instrument self should overlap.