Anti-swing structure of rotary encoder

Abstract

The utility model discloses an anti-swing structure of a rotary encoder, which comprises a base and an encoding disc, a cylindrical flange I is arranged at the bottom in the base, a cylindrical flange II extends out of the bottom of the encoding disc, the outer wall of the cylindrical flange II is rotatably connected with the inner wall of the cylindrical flange I, and a shell and a limiting piece are arranged on the base. The hole wall of the receding hole of the shell is riveted with the outer wall of the limiting piece, a space is formed between the inner wall of the limiting piece and the outer wall of the rotating shaft, the limiting piece extends outwards to form a third cylindrical flange, the third cylindrical flange is connected with the space in a clamped mode, and the rotating shaft can drive the coding disc to rotate; the cylindrical flange II is rotationally connected with the cylindrical flange I, so that the coding disc is kept concentric during rotation, and swinging is avoided; the limiting piece is fixed through riveting with the avoiding hole of the shell and makes contact with the upper surface of the coding disc to form an up-down clamping structure, and the shell and the cylindrical flange clamp the limiting piece, so that up-down movement of the coding disc is further restrained, and shaking of the coding disc is effectively prevented.

Description

Technical Field

[0001] This utility model belongs to the technical field of rotary encoders, specifically an anti-sway structure for rotary encoders. Background Technology

[0002] A rotary encoder is an electromechanical device used to measure rotation angle or rotational position. It typically converts mechanical rotation into an electrical signal output to detect the position, speed, or direction of a motor, shaft, or other rotating component.

[0003] In existing rotary encoders, the housing and the rotating shaft are in direct contact, such as the "rotary encoder" disclosed in patent document "CN103292828B". The rotating shaft 3 passes through the housing 2 and contacts the hole wall of the housing 2. The rotation of the rotating shaft drives the rotor to rotate.

[0004] After prolonged use, wear will occur between the rotating shaft and the bore wall of the housing, which will cause the rotating shaft to wobble and directly affect the reliability of the output signal. Utility Model Content

[0005] The purpose of this invention is to provide an anti-sway structure for a rotary encoder to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A rotary encoder anti-sway structure includes a base and an encoder disk. A cylindrical flange one is provided at the bottom of the base, and a cylindrical flange two extends from the bottom of the encoder disk. The outer wall of the cylindrical flange two is rotatably connected to the inner wall of the cylindrical flange one. A housing and a limiting member are provided on the base. The wall of the clearance hole in the housing is riveted to the outer wall of the limiting member. A space is provided between the inner wall of the limiting member and the outer wall of the rotating shaft. A cylindrical flange three extends from the limiting member and engages with the space. The rotating shaft can drive the encoder disk to rotate.

[0008] In a further technical solution, the rotating shaft includes a rotating part and a connecting part, the rotating part and the connecting part are fixedly connected, the limiting member is sleeved on the connecting part, the outer wall of the connecting part has an irregular groove with an opening facing downward, the inner wall of the limiting member has a groove with an opening facing downward, and the irregular groove and the groove form the space.

[0009] In a further technical solution, the outer wall of the limiting member is provided with a pressing part, the pressing part is integrally formed with the outer wall of the limiting member, the limiting member can abut against the upper surface of the encoder disk, and the pressing part can abut against the upper surface of the housing.

[0010] A further technical solution is provided with positioning posts at the four corners of the base. Two positioning posts located on opposite sides of the base form a group. Two positioning holes are provided on the spring piece. The two positioning holes are arranged on opposite sides. A spring piece is provided inside the base. The spring piece is fitted onto the base through the positioning holes. The positioning posts are inserted into the positioning holes.

[0011] In a further technical solution, the housing has two positioning holes, which are arranged opposite each other. The housing is fitted onto the base through the positioning holes, and the positioning post is inserted into the positioning hole.

[0012] In a further technical solution, the rotating part of the rotating shaft is provided with a planar groove, which is used to facilitate gripping.

[0013] In a further technical solution, the connecting part is provided with a circular groove, the circular groove is located above the irregular groove, the circular groove communicates with the irregular groove, the circular groove and the groove form a sealing groove, and the connecting part is provided with a sealing strip, the sealing strip is engaged with the sealing groove.

[0014] In a further technical solution, the sidewall of the irregular groove includes a flat surface and an arc surface, and there are four flat groove walls and four arc surface groove walls, which are spaced apart.

[0015] The beneficial effects of this utility model are:

[0016] This invention forms a stable rotational support by rotating the second cylindrical flange to the first cylindrical flange inside the base, ensuring that the encoder disc remains concentric during rotation and avoiding swaying caused by eccentricity or radial offset. The limiting member is fixed by riveting to the housing's clearance hole and contacts the upper surface of the encoder disc, forming an upper and lower clamping structure. The clamping force of the housing and the third cylindrical flange on the limiting member further constrains the vertical movement of the encoder disc, effectively preventing it from shaking. A space is maintained between the outer wall of the rotating shaft and the inner wall of the limiting member, and it is engaged with the third cylindrical flange, providing rotational freedom for the rotating shaft and limiting its radial offset. The rotating shaft and the limiting member together apply a clamping force to the encoder disc, further stabilizing its axial and radial position.

[0017] Other features and advantages of this invention will be described in detail in the following detailed description section. Attached Figure Description

[0018] Figure 1 : Overall structural diagram of this utility model.

[0019] Figure 2 : Front view of this utility model.

[0020] Figure 3: Cross-sectional view of this utility model.

[0021] Figure 4 The present utility model Figure 3 Enlarged view of part A.

[0022] Figure 5 : Exploded view of this utility model.

[0023] Reference numerals: 1. Base; 2. Encoder disk; 3. Cylindrical flange one; 4. Cylindrical flange two; 5. Housing; 6. Limiting component; 7. Alternating hole; 8. Cylindrical flange three; 10. Rotating shaft; 101. Rotating part; 102. Connecting part; 11. Irregular groove; 111. Flat groove wall; 112. Arc groove wall; 12. Groove; 13. Flat groove; 14. Sealing groove; 15. Sealing strip; 16. Pressing part; 17. Positioning pin; 18. Positioning hole one; 19. Spring piece; 20. Positioning hole two; Detailed Implementation

[0024] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0025] Please refer to Figure 1-5 ;

[0026] A rotary encoder anti-sway structure includes a base 1 and an encoder disk 2. The encoder disk 2 is located inside the base 1 and is rotatably mounted to the base 1. A cylindrical flange 3 is provided at the bottom of the base 1, and a cylindrical flange 4 extends from the bottom of the encoder disk 2. The outer wall of the cylindrical flange 4 is rotatably connected to the inner wall of the cylindrical flange 3. A housing 5 and a limiting member 6 are provided on the base 1. The wall of the clearance hole 7 of the housing 5 is riveted to the outer wall of the limiting member 6. A space is provided between the inner wall of the limiting member 6 and the outer wall of the rotating shaft 10. A cylindrical flange 8 extends from the limiting member 6 and engages with the space. The rotating shaft 10 can drive the encoder disk 2 to rotate.

[0027] Specifically, during assembly, the operator first installs the encoder disk 2 onto the base 1. More specifically, the outer wall of the second cylindrical flange 4 contacts the inner wall of the first cylindrical flange 3, while the lower surface of the encoder disk 2 contacts the upper surface of the first cylindrical flange 3. The encoder disk 2 can rotate relative to the base 1. Note that the encoder disk 2 should be positioned between the spring piece 19 and the base 1. The second step involves the operator inserting the limiting member 6 through the clearance hole 7 of the housing 5. The limiting member 6 and the housing 5 are riveted together, meaning the limiting member 6 is riveted to the wall of the clearance hole 7. The third step involves the operator installing the limiting member 6 and the housing 5 onto the base 1. It is worth noting that at this time, the inner wall of the limiting member 6 contacts the outer wall of the cylindrical flange 3 8, and the inner wall of the limiting member 6 is rotatably connected to the outer wall of the cylindrical flange 3 8. At the same time, the bottom surface of the limiting member 6 contacts the upper surface of the encoder disk 2. In the fourth step, the rotating shaft 10 is inserted into the encoder disk 2, and the outer wall of the rotating shaft 10 abuts against the inner wall of the encoder disk 2. The encoder disk 2 rotates with the rotation of the rotating shaft 10. More specifically, the encoder disk 2 has a non-circular slot, and the rotating shaft 10 is inserted into the slot. Thus, the rotation of the rotating shaft 10 can drive the encoder disk 2 to rotate. It is worth noting that the outer wall of the rotating shaft 10 and the limiting member 6 are in contact. A space is formed between the housing 5 and the cylindrical flange 3 8, which engages with the cylindrical flange 3 8. The rotating shaft 10 and the limiting member 6 create a clamping force on the encoder disk 2, further stabilizing it. It is worth noting that the clamping force between the housing 5 and the cylindrical flange 3 8 creates a clamping force on the limiting member 6. In one embodiment, the volume of the limiting member 6 is larger than the space between the housing 5 and the cylindrical flange 3 8, further stabilizing the encoder disk 2 and preventing it from swaying through an interference fit. In another embodiment, a stable rotational support is formed by the rotational connection between the cylindrical flange 2 4 and the inner cylindrical flange 3 8 of the base 1, ensuring that the encoder disk 2 remains concentric during rotation and preventing eccentricity. Or radial offset causing swaying; the limiting member 6 is fixed by riveting to the housing 5 and contacting the upper surface of the encoder disk 2 to form an upper and lower clamping structure. The clamping force of the housing 5 and the cylindrical flange 8 on the limiting member 6 further constrains the upper and lower movement of the encoder disk 2, effectively preventing the encoder disk 2 from shaking; the outer wall of the rotating shaft 10 and the inner wall of the limiting member 6 are reserved, and it is engaged with the cylindrical flange 8, which provides the rotating shaft 10 with rotational freedom and restricts the radial offset of the rotating shaft 10. The rotating shaft 10 and the limiting member 6 jointly apply clamping force to the encoder disk 2, further stabilizing the axial and radial position of the encoder disk 2.

[0028] In this embodiment, the rotating shaft 10 includes a rotating part 101 and a connecting part 102. The rotating part 101 and the connecting part 102 are fixedly connected. The limiting member 6 is sleeved on the connecting part 102. The outer wall of the connecting part 102 has an irregular groove 11 with an opening facing downward. The inner wall of the limiting member 6 has a groove 12 with an opening facing downward. The irregular groove 11 and the groove 12 form a space. The rotating part 101 of the rotating shaft 10 has a flat groove 13 for easy gripping. The connecting part 102 has a circular groove located above the irregular groove 11 and communicating with the irregular groove 11. The circular groove and the groove 12 form a sealing groove 14. The connecting part 102 is provided with a sealing strip 15, which engages with the sealing groove 14. Furthermore, the sidewall of the irregular groove 11 includes a flat surface and an arc surface. There are four flat groove walls 111 and four arc surface groove walls 112, which are spaced apart.

[0029] Specifically, during assembly, the operator first installs the encoder disk 2 on the base 1, so that the outer wall of the cylindrical flange 2 4 of the encoder disk 2 contacts the inner wall of the inner cylindrical flange 3 of the base 1, and at the same time, the lower surface of the encoder disk 2 is in contact with the upper surface of the cylindrical flange 3, ensuring that the encoder disk 2 can rotate relative to the base 1; then the assembled limiting member 6 and the housing 5 are installed on the base 1, at which time the inner wall of the limiting member 6 is rotatably connected to the outer wall of the cylindrical flange 3 8, and the bottom surface of the limiting member 6 contacts the upper surface of the encoder disk 2, completing the initial clamping of the encoder disk 2; then the rotating shaft 10 is inserted into the encoder disk 2. The rotating shaft 10 is divided into a rotating part 101 and a connecting part 102. The rotating part 101 is easy to hold and drive through the flat groove 13, and the connecting part 102 is inserted into the non-circular slot of the encoder disk 2 and abuts against the inner wall of the encoder disk 2, ensuring that the rotating shaft 10 drives the encoder disk 2 to rotate when it rotates.

[0030] In addition, the upper end of the limiting member 6 is sleeved on the connecting part 102 of the rotating shaft 10. The irregular groove 11 of the connecting part 102 and the groove 12 of the inner wall of the limiting member 6 form a space to further clamp the cylindrical flange 8 and further stabilize the encoder disk 2. At the same time, the circular groove of the connecting part 102 communicates with the irregular groove 11 and together with the groove 12 forms a sealing groove 14. The sealing strip 15 is installed into the sealing groove 14 and fixed by snap-fit ​​to ensure that the sealing strip 15 and the sealing groove 14 are tightly connected, thus completing the assembly.

[0031] In use, the rotating part 101 of the rotating shaft 10 is driven by external force through the planar groove 13, such as manual rotation or mechanical transmission, which drives the connecting part 102 and the encoder disk 2 to rotate synchronously. The radial offset of the rotating shaft 10 and the encoder disk 2 is restricted by the snap-fit ​​of the cylindrical flange 8. The sealing strip 15 is snapped in the sealing groove 14 to prevent dust, moisture or other foreign objects from entering the space formed by the irregular groove 11 and the recess 12, keeping the internal structure clean and stable. Under the double clamping of the base 1 and the limiting member 6, the encoder disk 2 rotates stably with the rotating shaft 10 and outputs accurate encoding signals.

[0032] The irregular groove 11 of the connecting part 102 of the rotating shaft 10 and the groove 12 of the limiting member 6 cooperate to form a space and combine with the snap-fit ​​of the cylindrical flange 8, effectively constraining the radial and axial displacement of the rotating shaft 10 and the encoder disk 2, significantly improving rotational stability; the snap-fit ​​design of the sealing groove 14 formed by the circular groove and the groove 12 and the sealing strip 15 further isolates external environmental interference, prevents wear or jamming caused by foreign object intrusion, and extends service life; the planar groove 13 of the rotating part 101 facilitates operation and transmission, ensuring high efficiency and reliability of power transmission; the overall multi-layer clamping and sealing mechanism enables the encoder disk 2 and the rotating shaft 10 to maintain high precision and anti-sway capability in dynamic environments, making it particularly suitable for high-performance encoder applications under complex working conditions.

[0033] In this embodiment, the outer wall of the limiting member 6 is provided with a pressing part 16, which is integrally formed with the outer wall of the limiting member 6. The limiting member 6 can abut against the upper surface of the encoder disk 2, and the pressing part 16 can abut against the upper surface of the housing 5. When the limiting member 6 abuts against the upper surface of the encoder disk 2, the pressing part 16 abuts against the upper surface of the housing 5 to improve the stability of the limiting member 6.

[0034] In this embodiment, positioning posts 17 are provided at the four corners of the base 1. Two positioning posts 17 located on opposite sides of the base 1 form a group. A spring piece 19 is provided inside the base 1. Two positioning holes 18 are provided on the spring piece 19. The two positioning holes 18 are arranged opposite sides. The spring piece 19 is fitted onto the base 1 through the positioning holes 18. The positioning posts 17 are inserted into the positioning holes 18. Furthermore, two positioning holes 20 are provided on the housing 5. The two positioning holes 20 are arranged opposite sides. The housing 5 is fitted onto the base 1 through the positioning holes 20. The positioning posts 17 are inserted into the positioning holes 20.

[0035] Specifically, during assembly, the operator first installs the spring piece 19 onto the base 1. The base 1 has four positioning posts 17 at its four corners, arranged in two sets of opposite sides. The spring piece 19 has two opposite positioning holes 18. The positioning holes 18 of the spring piece 19 are aligned with one set of positioning posts 17 on the base 1, and the spring piece 19 is fixed to the base 1 by insertion. Subsequently, the housing 5 and the limiting member 6 are installed onto the base 1. The housing 5 has two opposite positioning holes 20. These two positioning holes 20 are aligned with another set of opposite positioning posts 17 on the base 1, and the housing 5 is fitted onto the base 1 by insertion. Through the insertion design of the positioning posts 17 with the positioning holes 18 and 20, the spring piece 19 and the housing 5 are quickly positioned and fixed without the need for complex tools or additional fasteners.

[0036] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0037] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style of the specification is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other implementations that can be understood by those skilled in the art.

Claims

1. A rotary encoder anti-sway structure, characterized in that, The device includes a base (1) and an encoder disk (2). The base (1) has a cylindrical flange 1 (3) at its bottom. The encoder disk (2) has a cylindrical flange 2 (4) extending outward from its bottom. The outer wall of the cylindrical flange 2 (4) is rotatably connected to the inner wall of the cylindrical flange 1 (3). The base (1) is provided with a housing (5) and a limiting member (6). The wall of the clearance hole (7) of the housing (5) is riveted to the outer wall of the limiting member (6). The inner wall of the limiting member (6) and the outer wall of the rotating shaft (10) are provided with a space. The limiting member (6) has a cylindrical flange 3 (8) extending outward. The cylindrical flange 3 (8) is engaged with the space. The rotating shaft (10) can drive the encoder disk (2) to rotate.

2. The anti-sway structure for a rotary encoder according to claim 1, characterized in that, The rotating shaft (10) includes a rotating part (101) and a connecting part (102). The rotating part (101) and the connecting part (102) are fixedly connected. The limiting member (6) is sleeved on the connecting part (102). The outer wall of the connecting part (102) has an irregular groove (11) with the opening facing downward. The inner wall of the limiting member (6) has a groove (12) with the opening facing downward. The irregular groove (11) and the groove (12) form the space.

3. The anti-sway structure for a rotary encoder according to claim 1, characterized in that, The outer wall of the limiting member (6) is provided with a pressing part (16), the pressing part (16) is integrally formed with the outer wall of the limiting member (6), the limiting member (6) can abut against the upper surface of the encoder disk (2), and the pressing part (16) can abut against the upper surface of the housing (5).

4. The anti-sway structure for a rotary encoder according to claim 1, characterized in that, The base (1) has positioning posts (17) at its four corners. Two positioning posts (17) located on opposite sides of the base (1) form a group. A spring piece (19) is provided inside the base (1). Two positioning holes (18) are opened on the spring piece (19). The two positioning holes (18) are located on opposite sides. The spring piece (19) is fitted onto the base (1) through the positioning holes (18). The positioning posts (17) are inserted into the positioning holes (18).

5. The anti-sway structure for a rotary encoder according to claim 4, characterized in that, The housing (5) has two positioning holes (20) on it. The two positioning holes (20) are arranged opposite each other. The housing (5) is fitted onto the base (1) through the positioning holes (20). The positioning post (17) is inserted into the positioning hole (20).

6. The anti-sway structure for a rotary encoder according to claim 2, characterized in that, The rotating part (101) of the rotating shaft (10) is provided with a flat groove (13), which is used to facilitate gripping.

7. The anti-sway structure for a rotary encoder according to claim 2, characterized in that, The connecting part (102) has a circular groove, which is located above the irregular groove (11). The circular groove communicates with the irregular groove (11). The circular groove and the groove (12) form a sealing groove (14). The connecting part (102) is provided with a sealing strip (15), which engages with the sealing groove (14).

8. The anti-sway structure for a rotary encoder according to claim 2, characterized in that, The sidewall of the irregular groove (11) includes a planar groove wall and an arc groove wall. There are four planar groove walls (111) and four arc groove walls (112). The planar groove walls (111) and the arc groove walls (112) are spaced apart.

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