CN217358557U

CN217358557U - Off-axis absolute value encoder

Info

Publication number: CN217358557U
Application number: CN202221115737.4U
Authority: CN
Inventors: 方国祥
Original assignee: Shanghai Hengxiang Optical Electronic Co ltd
Current assignee: Shanghai Hengxiang Optical Electronic Co ltd
Priority date: 2022-05-11
Filing date: 2022-05-11
Publication date: 2022-09-02
Anticipated expiration: 2032-05-11

Abstract

The utility model relates to a motor encoder technical field discloses an off-axis formula absolute value encoder, including ring flange, base, the base is fixed on the ring flange, the fixed bearing bracket that sets up on the base sets up code wheel and PCB board between base and bearing bracket, set up the axle sleeve in the middle of the base, the code wheel is fixed in on the wing edge of axle sleeve, set up tight circle and the lock nut that expands in the axle sleeve, the PCB board is fixed on the bearing bracket, the both ends of axle sleeve set up the bearing, and the bearing is fixed in respectively on base and the bearing bracket, lock nut pins tight circle expands. The utility model discloses use from the coaxial flexible connection of holding tightly of shaft type, realize ultra-thin super small structure, simple to operate, the precision is high.

Description

Off-axis absolute value encoder

Technical Field

The utility model relates to a motor encoder technical field especially relates to an off-axis formula absolute value encoder.

Background

Absolute value encoders are used for precision motion control, particularly linear motion. The existing mounting method of the absolute value encoder is generally to mount the motor shaft by a coupler. And the measuring accuracy of the encoder is reduced due to the inherent vibration of the motor and the play of the motor shaft. Meanwhile, due to the limitation of the installation position, the occupied space is large, and the requirement of miniaturization is not facilitated.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the above problem, provide an off-axis formula absolute value encoder, use the coaxial flexonics of holding tightly of off-axis type, realize ultra-thin super small structure, simple to operate, the precision is high.

The utility model adopts the technical proposal that:

the utility model provides an off-axis formula absolute value encoder, characterized by, includes ring flange, base, the base is fixed on the ring flange, the fixed bearing bracket that sets up on the base sets up code wheel and PCB board between base and bearing bracket, set up the axle sleeve in the middle of the base, the code wheel is fixed in on the wing edge of axle sleeve, set up tight circle and lock nut expand in the axle sleeve, the PCB board is fixed on the bearing bracket, the both ends of axle sleeve set up the bearing, and the bearing is fixed in respectively on base and the bearing bracket, lock nut pins the tight circle that expands.

Further, the base is fixed on the flange plate through an elastic frame, the elastic frame comprises a square plate spring and a flange, and the flange is respectively connected with the base and the flange plate to fix the base and the flange plate.

Furthermore, the expansion ring is a conical sleeve, the side edge of the expansion ring is provided with a notch, the upper end of the expansion ring is provided with external threads, and the external threads are matched with the locking nut, so that the expansion ring is sleeved on the rotating shaft.

Furthermore, the upper end of the locking nut is provided with a wrench opening.

Further, the PCB board is equipped with the wiring end, the wiring end is located one side of PCB board, it dodges the groove to open the correspondence on the bearing frame.

Further, outside the bearing bracket, still set up the back lid, the back lid cover sets up outside base and the bearing bracket, cover after and set up the groove of dodging corresponding with the wiring end on the PCB board.

Furthermore, the coded disc is connected with the PCB through a pair of magnetic discs.

The utility model has the advantages that:

(1) the off-axis structure is convenient to install and compact;

(2) the flexible connection of the base reduces vibration interference;

(3) the protocol function of the encoder is not affected.

Drawings

FIG. 1 is an exploded view of the present invention;

FIG. 2 is a schematic view of the location of the flange and base;

FIG. 3 is a schematic view of a bushing mounting structure;

fig. 4 is a schematic diagram of a PCB board mounting position.

The reference numbers in the drawings are respectively:

1. a flange plate; 2, a base;

3. a bearing bracket; 4, code disc;

5, PCB board; 6, shaft sleeve;

7. expanding and tightening the ring; 8, locking the nut;

9. a bearing; 10, an elastic frame;

11. flanging; edge breaking;

13. a pair level magnetic disk; a terminal;

15. an avoidance groove; a rear cover;

17. and (5) turning a mouth.

Detailed Description

The following describes in detail an embodiment of the off-axis absolute encoder according to the present invention with reference to the accompanying drawings.

Referring to the attached drawing 1, the off-axis absolute value encoder comprises a flange plate 1 and a base 2, wherein the base 2 is fixed on the flange plate 1, a bearing frame 3 is fixedly arranged on the base 2, a code wheel 4 and a PCB 5 are arranged between the base 2 and the bearing frame 3, a shaft sleeve 6 is arranged in the middle of the base 2, the code wheel 4 is fixed on a fin edge of the shaft sleeve 6, and the code wheel 4 is connected with the PCB 5 through a grading magnetic disc 13. Set up tight circle 7 and lock nut 8 that expand in the axle sleeve 6, PCB board 5 is fixed on bearing bracket 3, and the both ends of axle sleeve 6 set up bearing 9, and on bearing 9 was fixed in base 2 and bearing bracket 3 respectively, lock nut 8 pinned tight circle 7 that expands.

Referring to the attached drawing 2, the base 2 is fixed on the flange 1 through the elastic frame 10, the elastic frame 10 is made of spring steel material, the bottom of the elastic frame is a square frame, the elastic frame 10 is provided with four flanges 11 which are located at four diagonal positions of a regular angle, and the two opposite flanges 11 are respectively connected with the base 2 and the flange 1 through fastening screws, so that the base 2 and the flange 1 are fixedly connected, and the vibration absorption of the base 2 and the flange is realized.

Referring to fig. 3, two ends of the shaft sleeve 6 are respectively provided with a connecting bearing 9, and the bearings 9 are respectively fixed in the base 2 and the bearing frame 3 to support the rotation of the shaft sleeve 6. An expansion ring 7 is sleeved in the shaft sleeve 6, the expansion ring 7 is a conical sleeve, the side edge of the expansion ring 7 is provided with a notch edge 12, the upper end of the expansion ring is provided with an external thread, and the external thread is matched with a locking nut 8, so that the expansion ring 7 is tightly sleeved on the rotating shaft. The expansion ring type shaft fixing form is not a precedent applied to the encoder, an internal connection type external shaft connection mode is replaced, the occupied space is reduced, the shaft can be locked through the locking nut 8, and the coded disc 4 of the encoder and a motor shaft are relatively fixed. A jaw 17 is provided at the upper end of the lock nut 8, and a tightening operation is performed by a special wrench at the time of installation.

Referring to fig. 4, the PCB 5 is provided with a terminal 14, the terminal 14 is located at one side of the PCB 5, and the bearing frame 3 is provided with a corresponding relief groove 15. A rear cover 16 is also fitted over the entire encoder. The back cover 16 covers the base 2 of the encoder. A corresponding relief groove 15 is also provided in the rear cover 16 to allow external wiring to the PCB board 5. The components on the PCB board 5 are not shown in the figure,

when the motor shaft expanding device works, after the encoder penetrates into the motor shaft, the flange plate 1 is tightly connected with the motor, and the locking nut 8 is screwed up through the wrench, so that the motor shaft is fixed on the shaft sleeve 6 through the expanding ring 7. When the motor rotates, the motor shaft drives the coded disc 4 to rotate, and the PCB 5 records the movement of the coded disc 4, so that movement data coding is realized. The eccentricity and vibration of the motor during rotation are absorbed by the elastic frame 10.

The above is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the principle of the present invention, and these improvements and decorations should also be regarded as the protection scope of the present invention.

Claims

1. An off-axis absolute value encoder, comprising: the PCB expansion mechanism comprises a flange plate and a base, wherein the base is fixed on the flange plate, a bearing frame is fixedly arranged on the base, a coded disc and a PCB are arranged between the base and the bearing frame, a shaft sleeve is arranged in the middle of the base, the coded disc is fixed on the wing edge of the shaft sleeve, an expansion ring and a locking nut are arranged in the shaft sleeve, the PCB is fixed on the bearing frame, bearings are arranged at two ends of the shaft sleeve and are respectively fixed on the base and the bearing frame, and the expansion ring is locked by the locking nut.

2. An off-axis absolute value encoder according to claim 1, wherein: the base is fixed on the flange plate through the elastic frame, the elastic frame comprises a square plate spring and a flange, and the flange is connected with the base and the flange plate respectively to fix the base and the flange plate.

3. An off-axis absolute value encoder according to claim 1, wherein: the expansion ring is a conical sleeve, the side edge of the expansion ring is provided with a notch, the upper end of the expansion ring is provided with an external thread, and the expansion ring is matched with the locking nut, so that the expansion ring is sleeved on the rotating shaft.

4. An off-axis absolute value encoder according to claim 1, wherein: and a spanner opening is formed in the upper end of the locking nut.

5. An off-axis absolute value encoder according to any of claims 1 to 4, wherein: the PCB board is equipped with the wiring end, the wiring end is located one side of PCB board, it dodges the groove to open to have the correspondence on the bearing frame.

6. An off-axis absolute value encoder according to claim 5, wherein: the bearing frame is provided with a back cover, the back cover is sleeved with a base and the bearing frame is provided with a back cover, and the back cover is provided with an avoiding groove corresponding to a wiring end on the PCB.

7. An off-axis absolute value encoder according to any of claims 1 to 4, wherein: the coded disc is connected with the PCB through the pair-level magnetic disc.