CN114614632A

CN114614632A - Encoder flexible connection structure and encoder

Info

Publication number: CN114614632A
Application number: CN202210382360.7A
Authority: CN
Inventors: 方国祥
Original assignee: Shanghai Hengxiang Optical Electronic Co ltd
Current assignee: Shanghai Hengxiang Optical Electronic Co ltd
Priority date: 2022-04-12
Filing date: 2022-04-12
Publication date: 2022-06-10

Abstract

The application relates to a flexible encoder connecting structure and an encoder, wherein the flexible encoder connecting structure comprises a fixed base ring, a buffer part and a positioning part; the buffer piece is connected in the fixed base ring in a sliding mode. The buffer part is connected to one side, far away from the fixed base ring, of the positioning part in a sliding mode, the sliding direction of the positioning part relative to the buffer part is not parallel to the sliding direction of the buffer part relative to the fixed base ring, the side wall of the positioning part is provided with a positioning hole, and the positioning part is arranged in the positioning hole. The method and the device have the effects of reducing and relieving the jitter of the grating disk in the encoder generated in the rotating process so as to improve the stability of the rotary encoder.

Description

Encoder flexible connection structure and encoder

Technical Field

The application relates to the technical field of encoders, in particular to an encoder flexible connection structure and an encoder.

Background

The photoelectric rotary encoder can convert mechanical quantities such as angular displacement and angular speed of an output shaft into corresponding electric pulses through photoelectric conversion and output the electric pulses in digital quantity (REP).

The encoder is fixed in the related art by adopting two or more screws arranged on the inner bearing, so that the inner bearing is tightly propped against the side wall of the motor shaft to realize the positioning of the encoder.

In view of the above-mentioned related art, the inventor believes that the fixed length of the screw abutting against the side wall of the rotating shaft of the motor cannot be completely kept consistent, so that the shaft axis of the motor and the shaft axis of the encoder are not easily overlapped, and therefore the encoder can eccentrically rotate in the rotating process, so that the grating disk in the encoder is easily shaken, and the accuracy of the encoder is affected.

Disclosure of Invention

In order to alleviate the shake that grating disc produced at the pivoted in-process in the encoder to improve rotary encoder's precision, this application provides an encoder flexible connection structure and encoder.

On one hand, the flexible connection structure of the encoder provided by the application adopts the following technical scheme:

a flexible connection structure of an encoder comprises a fixed base ring, a buffer part and a positioning part; the buffer piece is connected in the fixed base ring in a sliding mode. The bolster slides and connects the setting element is kept away from one side of fixed base ring, the setting element for the slip direction of bolster with the bolster for the slip direction nonparallel of fixed base ring, the lateral wall of setting element is provided with the locating hole, be provided with the setting element in the locating hole.

By adopting the technical scheme, in the rotary encoder, the grating disc is rotationally connected to a rotating shaft of the motor through the bearing and the flexible structure, the positioning piece is sleeved on the rotating shaft of the motor, and the positioning piece is arranged in the positioning hole in a penetrating manner and is abutted against the rotating shaft of the motor, so that the positioning piece rotates along with the motor, but the positioning piece is fixed by adopting a positioning piece fixing manner, so that the positioning piece and the rotating shaft of the motor are not necessarily coaxial, if the positioning piece is not coaxial, the positioning piece arranged on the rotating shaft of the motor can rotate eccentrically in the rotating process of the motor, and when the positioning piece rotates eccentrically, the buffer piece has certain elastic deformation capacity, so that the buffer piece can buffer the influence caused by vibration in two different directions, and the eccentric rotation degree of the fixed base ring is reduced; the flexible structure can reduce the shake generated by the grating disk in the rotating process, thereby improving the precision of the rotary encoder.

Optionally, the sliding direction of the positioning element relative to the buffer element is perpendicular to the sliding direction of the buffer element relative to the fixed base ring.

Through adopting above-mentioned technical scheme, when the locating piece produced eccentric rotation, because the bolster has certain elastic deformation ability for bolster self can be in the influence that two vertically directions cushioned vibration brought, with the eccentric pivoted degree of reduction fixed base ring.

Optionally, the fixed base ring includes base ring and lateral wall ring, the base ring is located the one end of lateral wall ring, the base ring is close to one side of lateral wall ring is provided with X to the lug that slides, the bolster corresponds X is provided with X to the recess that slides to the position of lug that slides.

By adopting the technical scheme, the X-direction sliding bump moves along the X-direction sliding groove direction to buffer the shake of the X-direction sliding bump.

Optionally, one side of the X-direction sliding projection, which is away from the base ring, is provided with a skid-proof member.

Through adopting above-mentioned technical scheme, first anti-skidding piece has increased the frictional force between bolster and the fixed base ring to make the bolster be difficult to transition to shift too much towards X to a direction of lug that slides, make the bolster all can slide about first anti-skidding piece direction, in order to play the effect of buffering.

Optionally, two ends of the X-direction sliding projection are provided with arc buffer areas.

Through adopting above-mentioned technical scheme, the arc buffers are favorable to playing the effect of buffering for the bolster is difficult to damage, and in controllable within range, has increased the space that the bolster can be deformed, the effect of the buffering of reinforcing.

Optionally, one end of the buffer member, which is far away from the X-direction sliding groove, is provided with a Y-direction sliding projection, and the position of the positioning member, which corresponds to the Y-direction sliding projection, is provided with a Y-direction sliding groove adapted to the Y-direction sliding projection.

By adopting the technical scheme, the Y-direction sliding lug slides along the length direction of the Y-direction sliding groove so as to buffer the shake perpendicular to the X-direction sliding lug.

Optionally, a plurality of the X-direction sliding convex blocks are arranged and parallel to each other.

Through adopting above-mentioned technical scheme, a plurality of X are favorable to guaranteeing the stability of sliding to the lug that slides for the bolster is difficult to deflect at the in-process that slides.

Optionally, a plurality of Y-direction sliding bumps are arranged and are parallel to each other.

Through adopting above-mentioned technical scheme, a plurality of Y are favorable to guaranteeing the stability of sliding to the lug that slides for the bolster is difficult to deflect at the in-process that slides.

On the other hand, the encoder provided by the application adopts the following technical scheme:

an encoder comprises an outer shell, a circuit board, a grating disc, an outer shaft sleeve, an inner shaft sleeve and a flexible connection structure, wherein the outer shell is fixedly connected with the circuit board, a light-emitting element is arranged on the outer shell, a photosensitive element is arranged at the position, corresponding to the light-emitting element, on the circuit board, the grating disc is fixedly connected to the outer shaft sleeve, the grating disc is located between the light-emitting element and the photosensitive element, the outer shaft sleeve is rotatably connected to the inner shaft sleeve, and the outer side wall of a fixing base ring is fixedly connected to the inner shaft sleeve.

By adopting the technical scheme, in the installation process, the positioning piece is sleeved on the rotating shaft of the motor, and the positioning piece is fixed on the rotating shaft of the motor by utilizing the positioning piece; after the shell and other structures are assembled, the shell is fixedly connected with a shell of the motor; the butt is established in the pivot of motor to the flexible connection structure cover, because flexible structure and interior axle sleeve fixed connection, the pivot of motor passes through the rotation of flexible structure drive interior axle sleeve to drive the rotation of grating dish, reduce the vibration of grating dish in order to follow two mutually perpendicular directions.

In summary, the present application includes at least one of the following beneficial technical effects:

the flexible connection structure is adopted, and the jitter caused by eccentric rotation on the positioning piece is buffered from two mutually vertical directions, so that the influence on the stable rotation of the grating disk is reduced, and the precision of the rotary encoder is improved;

the X-direction sliding bump moves along the X-direction sliding groove direction to buffer the shake of the X-direction sliding bump;

first antiskid has increased the frictional force between bolster and the fixed base ring to make the bolster be difficult to transition to shift too much towards X to a direction of the lug that slides, make the bolster all can slide about first antiskid orientation.

Drawings

FIG. 1 is a schematic view of an overall structure of a flexible connection structure of an encoder according to the present application;

FIG. 2 is an exploded view of an encoder flexible linkage according to the present application;

FIG. 3 is a schematic diagram of an encoder according to the present application;

FIG. 4 is a schematic illustration of an exploded view of an encoder of the present application;

fig. 5 is a sectional view of an encoder of the present application.

Reference numerals: 1. a fixed base ring; 2. a buffer member; 3. a positioning member; 4. positioning holes; 5. a positioning member; 6. an X-direction sliding bump; 7. an X-direction sliding groove; 8. an anti-slip member; 9. an arc buffer area; 10. a Y-direction sliding bump; 11. a base ring; 12. a sidewall ring; 13. y-direction sliding grooves; 14. a housing; 15. a circuit board; 16. a grating disk; 17. an outer sleeve; 18. an inner sleeve; 19. a light emitting element; 20. a light sensitive element.

Detailed Description

The present application is described in further detail below with reference to figures 1-5.

The embodiment of the application discloses encoder flexible connection structure. Referring to fig. 1 and 2, the flexible connection structure of the encoder includes a fixed base ring 1, a buffer 2 slidably connected in the fixed base ring 1, and a positioning element 3 slidably connected with the buffer 2, wherein a sliding direction of the positioning element 3 relative to the buffer 2 is perpendicular to a sliding direction of the buffer 2 relative to the fixed base ring 1. A plurality of axisymmetric locating holes 4 are formed in the side wall of the locating piece 3, locating pieces 5 are installed in the locating holes 4, and the locating pieces 5 are set to be screw sections. The screw section does not protrude from the outer side wall of the positioning member 5.

The fixing base ring 1 is cylindrical as a whole and comprises a disc-shaped base ring 11 and a cylindrical side wall ring 12. The base ring 11 is located at one end of the side wall ring 12, and the side wall ring 12 is integrally formed at the outer peripheral edge of the base ring 11. Two X-direction sliding convex blocks 6 which are symmetrical by taking the central axis of the base ring 11 as a symmetry line are integrally formed on one side of the base ring 11 close to the side wall ring 12, and X-direction sliding grooves 7 which are approximately matched with the buffering piece 2 are integrally formed at the positions corresponding to the X-direction sliding convex blocks 6. The X-direction sliding bump 6 moves along the X-direction sliding groove 7 to buffer the shake of the X-direction sliding bump 6. Since the buffer 2 is embedded in the fixed base ring 1, the distance that the buffer 2 can slide is in the mm level. Meanwhile, the X-direction sliding lugs 6 are beneficial to ensuring the sliding stability, so that the buffer piece 2 is not easy to deflect in the sliding process.

In order to increase the friction force between the buffer member 2 and the fixing base ring 1, so that the buffer member 2 is not easy to transit and deviates too much towards one direction of the sliding lug 6 towards the X direction, the buffer member 2 can slide along the left and right directions of the anti-skid member 8, and the anti-skid member 8 is integrally formed on one side of the sliding lug 6 away from the base ring 11 towards the X direction. The anti-slip pieces 8 are rack-shaped and are distributed at equal intervals along the length direction of the X-direction slip convex block 6.

The two ends of the X-direction sliding lug 6 are integrally formed with arc buffer areas 9. The arc buffer zone 9 plays a role of buffering, so that the buffer member 2 is not easily damaged.

In order to buffer the shake perpendicular to the direction of the X-direction sliding bump 6, two Y-direction sliding bumps 10 arc-symmetric with the central axis of the buffer 2 as a symmetric line are integrally formed at one end of the buffer 2 away from the X-direction sliding groove 7, and a matched Y-direction sliding groove 13 is integrally formed at the position of the positioning piece 3 corresponding to the Y-direction sliding bump 10. The Y-direction slip projection 10 slips along the length direction of the Y-direction slip groove 13. The plurality of Y-direction sliding projections 10 are beneficial to ensuring the stability of sliding, so that the buffer member 2 is not easy to deflect in the sliding process.

The implementation principle of the flexible connection structure of the encoder in the embodiment of the application is as follows: firstly, the positioning part 3 is sleeved on the rotating shaft of the motor, the screw section is screwed into the positioning hole 4 from the outer side wall of the positioning part 3 to the inner side wall, and the screw section abuts against the rotating shaft of the motor, so that the positioning part 3 is fixedly arranged on the rotating shaft of the motor. And mounting the assembled buffer piece 2 and the fixing base ring 1 on the positioning piece 3. Because adopt the fixed setting element 3 of the fixed mode of setting element 5 for the pivot of setting element 3 and motor is not necessarily coaxial, and at motor shaft pivoted in-process, setting element 3 can produce eccentric rotation, when setting element 3 produced eccentric rotation, because the influence that the bolster 2 can cushion the vibration and bring in two vertically directions, consequently can reduce eccentric pivoted degree. In the rotary encoder, the grating disk 16 is rotatably connected to the rotating shaft of the motor through a bearing and a flexible structure, so as to reduce the jitter generated by the grating disk 16 during the rotation process, thereby improving the stability of the rotary encoder.

The embodiment of the application also discloses an encoder. Referring to fig. 3, an encoder is cylindrical as a whole and is configured to be sleeved on a rotating shaft of a motor. Referring to fig. 4 and 5, the optical fiber module includes a housing 14, a circuit board 15 built in the housing 14, a grating disk 16, an outer sleeve 17, an inner sleeve 18, and a flexible connection structure. The shell 14 is fixedly installed on the shell of the motor, the circuit board 15 is integrally and fixedly installed in the shell 14 in a circular ring shape, the shell 14 is provided with a light-emitting element 19, and a photosensitive element 20 is arranged on the circuit board 15 corresponding to the light-emitting element 19. The grating disk 16 is fixedly mounted on the outer sleeve 17, and the grating disk 16 is located between the light emitting element 19 and the light sensitive element 20. The outer shaft sleeve 17 is rotatably connected on the inner shaft sleeve 18, and the outer side wall of the fixed base ring 1 is fixedly arranged on the inner side wall of the inner shaft sleeve 18. In the process of installation, one side of the base ring 11 is far away from the motor, and the shell 14 and the positioning piece 3 are fixedly installed with the motor, so that the buffer piece 2 and the positioning piece 3 are not easy to axially move.

The implementation principle of an encoder in the embodiment of the present application is as follows: in the installation process, the positioning part 3 is sleeved on the rotating shaft of the motor, the screw section is screwed into the positioning hole 4 from the outer side wall of the positioning part 3 to the direction of the inner side wall, and the screw section is abutted against the rotating shaft of the motor, so that the positioning part 3 is fixedly installed on the rotating shaft of the motor. Other parts of the assembled encoder are sleeved on a rotating shaft of the motor, the shell 14 and a shell of the motor are fixedly installed, the positioning piece 3 is fixed on the rotating shaft of the motor by utilizing the positioning piece 5, the rotating shaft of the motor drives the inner shaft sleeve 18 to rotate through the flexible structure, so that the grating disc 16 is driven to rotate, and in the rotating process of the grating disc 16, the flexible connecting structure buffers vibration caused by eccentric rotation of the positioning piece 3 in two vertical directions, so that the accuracy of the encoder is improved.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. The utility model provides an encoder flexible connection structure which characterized in that: comprises a fixed base ring (1), a buffer piece (2) and a positioning piece (3); the buffer piece (2) is connected in the fixed base ring (1) in a sliding manner.

2. Bolster (2) slide and connect and be in keep away from in setting element (3) one side of fixed base ring (1), setting element (3) for the slip direction of bolster (2) with bolster (2) for the slip direction nonparallel of fixed base ring (1), the lateral wall of setting element (3) is provided with locating hole (4), be provided with setting element (5) in locating hole (4).

3. An encoder flexible connection according to claim 1, characterized in that: the sliding direction of the positioning piece (3) relative to the buffer piece (2) is perpendicular to the sliding direction of the buffer piece (2) relative to the fixed base ring (1).

4. An encoder flexible connection according to claim 2, characterized in that: the utility model discloses a fixing base ring, including base ring (11) and side wall ring (12), base ring (11) are located the one end of side wall ring (12), base ring (11) are close to one side of side wall ring (12) is provided with X to the lug (6) that slides, bolster (2) correspond X is provided with X to the position of the lug (6) that slides and slides recess (7).

5. An encoder flexible connection according to claim 3, characterized in that: and an anti-skid piece (8) is arranged on one side of the X-direction sliding convex block (6) far away from the base ring (11).

6. The encoder flexible connection structure of claim 4, wherein: arc buffer areas (9) are arranged at two ends of the X-direction sliding bump (6).

7. An encoder flexible connection according to claim 3, characterized in that: bolster (2) are kept away from X is provided with Y to the lug (10) that slides to the one end of sliding groove (7), setting element (3) correspond Y is provided with the Y of adaptation to the position of the lug (10) that slides to the groove (13) that slides.

8. An encoder flexible connection according to claim 3, characterized in that: the X-direction sliding lugs (6) are arranged in a plurality and are parallel to each other.

9. An encoder flexible connection according to claim 6, characterized in that: the Y-direction sliding bumps (10) are arranged in a plurality and are parallel to each other.

10. An encoder, characterized by: including shell (14), circuit board (15), grating dish (16), outer axle sleeve (17), interior axle sleeve (18) and flexible connection structure, shell (14) with circuit board (15) fixed connection, be provided with light emitting component (19) on shell (14), correspond on circuit board (15) light emitting component's (19) position is provided with light sensitive element (20), grating dish (16) fixed connection be in on outer axle sleeve (17), just grating dish (16) are located light emitting component (19) with between light sensitive element (20), outer axle sleeve (17) rotate to be connected on interior axle sleeve (18), the lateral wall fixed connection of fixed base ring (1) is in interior axle sleeve (18).