CN201653439U

CN201653439U - Rotating encoder

Info

Publication number: CN201653439U
Application number: CN200920199544XU
Authority: CN
Inventors: 杨宜虎
Original assignee: WUXI XINYA ELECTRONICS CO Ltd
Current assignee: WUXI XINYA ELECTRONICS CO Ltd
Priority date: 2009-11-05
Filing date: 2009-11-05
Publication date: 2010-11-24
Anticipated expiration: 2019-11-05

Abstract

The utility model relates to a rotating encoder, comprising a main body, a rotating shaft rotatablely installed on the main body, a grating disk base and a grating disk installed on the grating disk base, the grating disk base is screwedly connected with the rotating shaft by the threaded hole thereon, the upper end plane of the rotating shaft is perpendicular to the excircle surface of the rotating shaft, the locating surface of the grating disk base is abutted on the upper end plane of the rotating shaft, the grating disc is kept close to the installation surface of the upper end of the grating disk base, locating surface of the grating disk base is perpendicular to the centreline of the grating disk base, and the mounting face of the grating disk base is parallel to the locating surface. The rotating encoder of the utility model only need once assembly after processed, the assembly efficiency and accuracy are enhanced, and the end face run-out of the grating disk is reduced.

Description

A kind of rotary encoder

Technical field

The utility model relates to measurement mechanism, relates in particular to a kind of rotary encoder.

Background technology

Rotary encoder is the device that is used for measuring rotating speed, and the photo-electric rotary encoder is by opto-electronic conversion, can convert mechanical quantity such as the angular displacement of output shaft, angular velocity to corresponding electric pulse and export with digital quantity.The photo-electric rotary encoder comprises rotating shaft, grating dish and photoelectric detection system, and the grating dish is installed in the rotating shaft, and the grating dish is to open several slots on the disk of certain diameter five equilibrium.Rotating shaft drives the grating disc spins, carries out opto-electronic conversion by photoelectric detection system rotatablely moving of rotating shaft is converted to electric pulse output.

Beating of grating dish is most important parameter in the rotary encoder.Present rotary encoder major part is installed in the grating dish in the rotating shaft by grating dish seat, add man-hour in manufacturing, earlier grating dish seat is installed in the rotating shaft, and then the installed surface of processing grating dish seat, again the grating dish is installed on the installed surface of grating dish seat at last, in this way guarantees beating in 0.01mm of grating dish.What this rotary encoder adopted is to process earlier afterwards to assemble and then process the process and assemble route of assembling again, has reduced processing, efficiency of assembling.

Summary of the invention

The purpose of this utility model is to propose a kind of rotary encoder that improves efficiency of assembling and reduce grating dish face runout.

To achieve these goals, the technical solution adopted in the utility model is: a kind of rotary encoder, comprise main body, be rotatably installed in the rotating shaft on the main body, grating dish seat and be installed in grating dish on the grating dish seat, grating dish seat is threaded with rotating shaft by the threaded hole on it, the upper surface of rotating shaft is perpendicular to the periphery of rotating shaft, the locating surface of grating dish seat is resisted against on the upper surface of rotating shaft, the grating dish abuts on the installed surface of grating dish seat upper end, the center line of the locating surface vertical raster dish seat of grating dish seat, the installed surface positioned parallel face of grating dish seat.

Such scheme is by when processing rotating shaft and grating dish seat single part, guarantee the center line and the parallel installed surface of locating surface vertical raster dish seat of periphery, the grating dish seat of the upper surface vertical rotation axis of rotating shaft, just can guarantee that the grating dish is installed to behind the grating dish seat perpendicular to rotating shaft, thereby reduce the face runout of grating dish.After the utility model only needs process single part once assembling get final product, improved efficiency of assembling and assembly precision, and reduced the face runout of grating dish.

Description of drawings

Fig. 1 is the STRUCTURE DECOMPOSITION figure of the utility model rotary encoder;

Fig. 2 is the structural drawing of the utility model rotary encoder;

Fig. 3 is the cut-open view of the utility model rotary encoder;

Fig. 4 is grating dish seat 3 cut-open views among Fig. 1;

Fig. 5 is rotating shaft 2 cut-open views among Fig. 1.

Below in conjunction with accompanying drawing the utility model is described in detail.

Embodiment

Referring to Fig. 1 to Fig. 3, rotary encoder comprises main body 1, rotating shaft 2, grating dish seat 3, grating dish 4 and trim ring 5, and rotating shaft 2 is installed on the main body 1 by bearing 8, can rotate relative to main body 1.Referring to Fig. 5, rotating shaft 2 has the external thread 22 of close upper end.Referring to Fig. 4, grating dish seat 3 has the threaded hole 31 in the middle and lower part, and grating dish seat 3 is threaded with external thread 22 in the rotating shaft 2 by threaded hole 31 and is installed in the rotating shaft 2.Threaded hole 31 is concentric with grating dish seat 3, thereby can guarantee that grating dish seat 3 is concentric with rotating shaft 2.The upper end of rotating shaft 2 is the boss 23 of diameter less than screw thread 22 external diameters, and the upper surface 24 of rotating shaft is perpendicular to the periphery 21 of rotating shaft, also promptly perpendicular to the center line of rotating shaft 2.

Referring to Fig. 4, grating dish seat 3 has the pilot hole 32 above threaded hole 31, and the upper surface of pilot hole 32 is locating surface 33 perpendicular to the center line of grating dish seat 3.3 rotations of grating dish seat are installed in the rotating shaft 2, till grating dish seat 3 is tightened.When installing, the locating surface 33 of grating dish seat 3 is resisted against on the upper surface 24 of rotating shaft 2.The degree of depth of pilot hole 32 is less than the height of the boss 23 of rotating shaft 2, and there is less clearance between the outside wall surface of the sidewall of pilot hole 32 and boss 23, thereby when guaranteeing that grating dish seat 3 tightens in the rotating shaft 2, locating surface 33 is resisted against on the upper surface 24 of rotating shaft 2, thereby guarantee the center line of locating surface 33 vertical rotation axis 2, and guarantee that grating dish seat 3 is concentric with rotating shaft 2.Installed surface 34 is in the upper end of grating dish seat 3, boss 35 installed surfaces 34 protruding upward.Grating dish 4 has the mounting hole at the middle part, when being installed to grating dish 4 on the grating dish seat 3, the boss 35 of grating dish seat is inserted in the mounting hole of grating dish 4, and the lower plane of grating dish is abutted on the installed surface 34.Installed surface 34 is parallel to locating surface 33, guaranteeing grating dish 4 perpendicular to rotating shaft 2, thereby reduces the face runout of grating dish 4.

Trim ring 5 is installed on the grating dish seat 3, and is pressed on the last plane of grating dish 4, prevents that grating dish 4 breaks away from grating dish seat 3, and further reduces the face runout of grating dish 4.

Claims

1. rotary encoder, comprise main body (1), be rotatably installed in the rotating shaft (2) on the described main body, grating dish seat (3) and be installed in grating dish (4) on the described grating dish seat, grating dish seat is threaded with rotating shaft by the threaded hole on it (31), it is characterized in that, the upper surface of described rotating shaft (24) is perpendicular to the periphery (21) of rotating shaft, the locating surface (33) of grating dish seat is resisted against on the upper surface (24) of rotating shaft, the grating dish abuts on the installed surface (34) of grating dish seat upper end, the center line of locating surface (33) the vertical raster dish seat of described grating dish seat, installed surface (34) the positioned parallel face (33) of grating dish seat.

2. rotary encoder according to claim 1, it is characterized in that, described rotating shaft has the boss (23) in the upper end, described grating dish seat has the pilot hole (32) in threaded hole (31) top, threaded hole (31) is concentric with grating dish seat, locating surface (33) is the end face of pilot hole (32), and the degree of depth of pilot hole (32) is less than the height of boss (23).

3. rotary encoder according to claim 2 is characterized in that, trim ring (5) is installed on the grating dish seat (3), and is pressed on the last plane of grating dish (4).