Electromagnetic interference resistant optical rotary encoder

Abstract

The utility model discloses an optical -electric rotary encoder of preventing electromagnetic interference relates to encoder technical field, including the shell, the shell one end is connected with the end cover, the end cover one end rotatory mounting has the pivot that penetrates the end cover, and the pivot one end is connected with the shell rotation, be connected through the fixed mechanism between the shell and the end cover, the utility model discloses a fixed mechanism, can through to the electromagnet electrification to attract push -pad drive and separate the plug -in post and the block, then rotate the shell and drive the block to remove to the rail groove opening, can dismantle it, the internal component of shell is convenient for overhauling maintenance, has improved work efficiency, when installing, repeat the above -mentioned steps, install the block to the rail groove again, stop the electromagnet electrification, make the plug -in post reset and pass through the block, can complete the connection fixed of shell and end cover, convenient to use, and the practicality is strong, the utility model discloses the detachable installation between the fixed ring and the shell, is convenient for the electromagnet, spring two and push -pad dismounting maintenance or replacement.

Description

Technical Field

[0001] This utility model relates to the field of encoder technology, specifically an electromagnetic interference-resistant photoelectric rotary encoder. Background Technology

[0002] An encoder is a device that encodes and converts signals or data into a signal form that can be used for communication, transmission, and storage. It converts angular or linear displacement into electrical signals; the part that converts angular displacement into electrical signals is called a code disk, and the part that converts linear displacement into electrical signals is called a code scale. According to the readout method, encoders can be divided into contact and non-contact types; according to their working principle, they can be divided into incremental and absolute types. Photoelectric rotary encoders belong to this category of encoders; they are sensors that convert mechanical geometric displacement on the output shaft into pulses or digital quantities through photoelectric conversion.

[0003] Photoelectric rotary encoders are widely used and play an important role in many fields such as mechanical automation, robotics, CNC machine tools, and precision instruments. They typically consist of a light source, code disk, detection grating, photoelectric device, housing, rotating shaft, and signal conversion and output circuitry. Because the signal output and system stability of encoders are affected by external electromagnetic interference, most modern encoders utilize an external metal shield for electrostatic shielding. This metal shield usually refers to the encoder's outer casing being made of metal.

[0004] However, a common problem exists in many encoders currently on the market. When internal maintenance of the encoder is required, the fixing bolts connecting the metal housing and the end cover must be removed one by one. This process is cumbersome and inconvenient, which not only reduces work efficiency but also makes it less practical. Summary of the Invention

[0005] The purpose of this invention is to provide an electromagnetic interference-resistant photoelectric rotary encoder to solve the problems mentioned in the prior art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: an electromagnetic interference-resistant photoelectric rotary encoder, comprising a housing, an end cap connected to one end of the housing, a rotating shaft rotatably mounted through the end cap at one end of the end cap, and one end of the rotating shaft rotatably connected to the housing, the housing and the end cap being connected by a fixing mechanism, a circuit board sleeved on the outside of the rotating shaft inside the housing, a photosensitive element provided on one side of the circuit board, a grating and a code disk arranged sequentially from near to far on one side of the photosensitive element outside the rotating shaft, and the code disk being fixedly connected to the rotating shaft, a light source symmetrically provided on one side of the code disk inside the housing, and the fixing mechanism including a locking block, the locking block being symmetrically arranged on the inside of the opening end of the housing.

[0007] Furthermore, the fixing mechanism also includes a baffle plate one, which is fixedly installed on the light source side inside the housing. A baffle plate two is provided on one side of the baffle plate one, and a spring one is fixedly connected to one side of the baffle plate two. The other end of the spring one is connected to the end cover. The side wall of one end of the end cover is symmetrically provided with rail grooves that are adapted to the locking block. A cavity is provided inside the one end of the end cover. An electromagnet, a spring two, and a push plate are arranged sequentially on the left and right sides of the cavity. There are several spring twos. A push plate is symmetrically provided with a pin, and one end of the pin passes through the locking block. The fixing mechanism allows for convenient and quick disassembly between the housing and the end cover to facilitate the inspection and maintenance of the components inside the housing, making it highly practical.

[0008] Furthermore, one end of the end cap is provided with an annular groove communicating with the chamber, and a fixing ring is provided in the annular groove. The outer wall of the fixing ring and the inner wall of the annular groove are respectively provided with a number of external threads and internal threads. A number of slots are symmetrically provided at one end of the fixing ring to facilitate the disassembly, replacement or maintenance of the electromagnet, spring 2 and push plate.

[0009] Furthermore, a limiting ring is fixedly installed on the side of the first baffle close to the second baffle, and a limiting groove adapted to the second baffle is opened on one side wall of the second baffle. The limiting ring has a semi-circular cross section to limit the second baffle.

[0010] Furthermore, one end of the end cap is provided with a mounting groove, one end of the spring is fixedly connected to the inner wall of the mounting groove, and the rail groove is L-shaped to guide and store the spring.

[0011] Furthermore, both the electromagnet and the push plate are ring-shaped. The electromagnet is electrically connected to an external controller via a circuit. The two ends of the second spring are fixedly connected to the electromagnet and the push plate, respectively, so that the spring force can be used to push the push plate to reset the insertion post, thereby fixing the locking block.

[0012] Compared with the prior art, the beneficial effects of this utility model are: 1. This utility model, through a fixing mechanism, allows for the attraction of a push plate by energizing an electromagnet, which then separates the insert from the locking block. The outer casing is then rotated to move the locking block to the opening of the rail groove, facilitating disassembly and allowing for convenient inspection and maintenance of internal components, thus improving work efficiency. During installation, the above steps are repeated, and the locking block is then installed into the rail groove. The electromagnet is then de-energized, allowing the insert to reset and pass through the locking block, thus completing the connection and fixing of the outer casing and end cover. It is convenient to use and highly practical. 2. This utility model facilitates the disassembly, maintenance, or replacement of the electromagnet, spring 2, and push plate through the detachable installation between the fixing ring and the outer shell. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2This is a partial cross-sectional structural schematic diagram of the present invention; Figure 3 This is a schematic diagram of the structure between the end cap and the second baffle of this utility model; Figure 4 This is a schematic diagram of the structure between the fixing ring, electromagnet, and push plate of this utility model; Figure 5 This is a utility model Figure 2 A magnified structural diagram of A in the middle.

[0014] The following are the labels in the diagram: 1. Outer shell; 2. End cap; 3. Shaft; 4. Circuit board; 5. Encoder disk; 6. Photosensitive element; 7. Light source; 8. Baffle 1; 9. Baffle 2; 10. Spring 1; 11. Limiting ring; 12. Locking block; 13. Electromagnet; 14. Spring 2; 15. Push plate; 16. Insert post; 17. Fixing ring; 18. Mounting groove; 19. Rail groove; 20. Chamber; 21. Slot; 22. Grating. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0016] Example: Figure 1 - Figure 5As shown, this utility model provides a technical solution: an electromagnetic interference-resistant photoelectric rotary encoder, including a housing 1, with an end cap 2 connected to one end of the housing 1. In this example, a sealing ring is provided at the connection between the housing 1 and the end cap 2. A rotating shaft 3 is rotatably mounted on one end of the end cap 2, penetrating the end cap 2, and one end of the rotating shaft 3 is rotatably connected to the housing 1. The housing 1 and the end cap 2 are connected by a fixing mechanism. A circuit board 4 is sleeved on the outside of the rotating shaft 3 inside the housing 1. A photosensitive element 6 is provided on one side of the circuit board 4. A grating 22 and a code disk 5 are arranged sequentially from near to far outside the rotating shaft 3 on one side of the photosensitive element 6, and the code disk 5 is fixedly connected to the rotating shaft 3. A light source 7 is symmetrically arranged on one side of the code disk 5 inside the housing 1. The fixing mechanism includes a locking block 12, and the locking block 12 is symmetrically arranged on the inside of the opening end of the housing 1. In this example, the fixing mechanism also includes a baffle 8, which is fixedly installed on one side of the light source 7 inside the housing 1. A baffle 9 is provided on one side of the baffle 8, and a spring 10 is fixedly connected to one side of the baffle 10. The other end of the spring 10 is connected to the end cover 2. A groove 19 adapted to the locking block 12 is symmetrically opened on the side wall of one end of the end cover 2. A cavity 20 is opened inside one end of the end cover 2. An electromagnet 13, a spring 14, and a push plate 15 are arranged sequentially on the left and right sides of the cavity 20. There are several springs 14. A push plate 15 is symmetrically provided with a post 16 on one end, and one end of the post 16 passes through the locking block 12. The fixing mechanism allows for convenient and quick disassembly between the housing 1 and the end cover 2, so as to inspect and maintain the components inside the housing 1. It is highly practical. In this example, a limiting ring 11 is fixedly installed on the side of baffle 8 near baffle 9. A limiting groove adapted to baffle 9 is opened on one side wall. The limiting ring 11 has a semi-circular cross-section to limit the movement of baffle 9. In this example, an installation groove 18 is opened at one end of end cap 2. One end of spring 10 is fixedly connected to the inner wall of installation groove 18. The rail groove 19 is L-shaped to guide and store spring 10.

[0017] In this example, one end of the end cap 2 has an annular groove communicating with the chamber 20. A fixing ring 17 is provided in the annular groove. The outer wall of the fixing ring 17 and the inner wall of the annular groove are respectively provided with several external threads and internal threads. Several slots 21 are symmetrically arranged at one end of the fixing ring 17 to facilitate the disassembly, replacement or maintenance of the electromagnet 13, the second spring 14 and the push plate 15. In this example, both the electromagnet 13 and the push plate 15 are annular. The electromagnet 13 is electrically connected to an external controller through a circuit. The two ends of the second spring 14 are fixedly connected to the electromagnet 13 and the push plate 15 respectively, so that the elastic force of the second spring 14 can push the push plate 15 to drive the insertion post 16 to reset, thereby fixing the locking block 12. In this example, both the outer shell 1 and the end cap 2 are made of metal materials that can provide electrostatic shielding.

[0018] The working principle of this utility model is as follows: When it is necessary to inspect and maintain the components inside the outer casing 1, the electromagnet 13 can be energized to generate an attractive force, thereby attracting the push plate 15 towards it. This causes the push plate 15 to compress the spring 14 and simultaneously move the insert 16 into the cavity 20, separating the insert 16 from the locking block 12. Then, the outer casing 1 can be rotated to move the locking block 12 within the rail groove 19 until it reaches a position corresponding to the opening at one end of the rail groove 19. The locking block 12 can then be removed from the rail groove 19, allowing for the maintenance and repair of the components inside the outer casing 1. This operation is convenient and quick, improving work efficiency. When it is necessary to assemble the outer casing 1 and the end cover 2, the above steps can be repeated, energizing the electromagnet 13 to attract the push plate 14. 5. Then, install the locking block 12 into the rail groove 19 and move it to the position of the corresponding insertion post 16. Then, stop energizing the electromagnet 13, so that the push plate 15 can be reset under the elastic force of the second spring 14, thereby pushing the insertion post 16 to reset and pass through the corresponding hole on the locking block 12, thus completing the connection and fixation between the outer shell 1 and the end cover 2. If it is necessary to disassemble and remove the electromagnet 13, the second spring 14, the push plate 15 and the insertion post 16 for maintenance or replacement later, a hexagonal wrench can be used. Insert one end of the wrench into a slot 21 opened at one end of the fixing ring 17, and then twist the fixing ring 17 to remove it. The electromagnet 13, the second spring 14, the push plate 15 and other components in the chamber 20 can be taken out. It is convenient to use and highly practical.

[0019] 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.

Claims

1. A photoelectric rotary encoder resistant to electromagnetic interference, comprising a housing (1), characterized in that: One end of the outer shell (1) is connected to an end cap (2). A rotating shaft (3) is rotatably installed through the end cap (2) at one end of the end cap (2), and one end of the rotating shaft (3) is rotatably connected to the outer shell (1). The outer shell (1) and the end cap (2) are connected by a fixing mechanism. A circuit board (4) is sleeved on the outside of the rotating shaft (3) inside the outer shell (1). A photosensitive element (6) is provided on one side of the circuit board (4). A grating (22) and a code disk (5) are arranged sequentially from near to far outside the rotating shaft (3) on one side of the photosensitive element (6), and the code disk (5) is fixedly connected to the rotating shaft (3). A light source (7) is symmetrically provided on one side of the code disk (5) inside the outer shell (1). The fixing mechanism includes a locking block (12), and the locking block (12) is symmetrically arranged on the inside of the opening end of the outer shell (1).

2. The photoelectric rotary encoder with electromagnetic interference protection according to claim 1, characterized in that: The fixing mechanism also includes a baffle (8), which is fixedly installed on the side of the light source (7) inside the housing (1). A baffle (9) is provided on one side of the baffle (8). A spring (10) is fixedly connected to one side of the baffle (9), and the other end of the spring (10) is connected to the end cover (2). A rail groove (19) adapted to the locking block (12) is symmetrically opened on one side wall of the end cover (2). A cavity (20) is opened inside one end of the end cover (2). An electromagnet (13), a spring (14) and a push plate (15) are arranged in sequence on the left and right sides of the cavity (20). There are several springs (14). A push plate (15) is symmetrically provided with a pin (16) on one end, and one end of the pin (16) passes through the locking block (12).

3. The photoelectric rotary encoder with electromagnetic interference protection according to claim 2, characterized in that: The end cap (2) has an annular groove at one end that communicates with the chamber (20). A fixing ring (17) is provided in the annular groove. The outer wall of the fixing ring (17) and the inner wall of the annular groove are respectively provided with a number of external threads and internal threads. A number of slots (21) are symmetrically arranged at one end of the fixing ring (17).

4. The photoelectric rotary encoder with electromagnetic interference protection according to claim 2, characterized in that: A limiting ring (11) is fixedly installed on the side of the first baffle (8) near the second baffle (9). A limiting groove adapted to the second baffle (9) is opened on one side wall of the second baffle (9). The limiting ring (11) has a semi-circular cross section.

5. The photoelectric rotary encoder with electromagnetic interference protection according to claim 2, characterized in that: The end cap (2) has an installation groove (18) at one end, and one end of the spring (10) is fixedly connected to the inner wall of the installation groove (18). The rail groove (19) is L-shaped.

6. The photoelectric rotary encoder with electromagnetic interference protection according to claim 2, characterized in that: Both the electromagnet (13) and the push plate (15) are ring-shaped. The electromagnet (13) is electrically connected to an external controller through a circuit. The two ends of the second spring (14) are fixedly connected to the electromagnet (13) and the push plate (15) respectively.

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