Anti-interference structure of rotary encoder

Abstract

The utility model discloses an anti-interference structure of a rotary encoder, which comprises an encoder shell and pins arranged at one end of the encoder shell at equal intervals, a first anti-interference assembly is arranged in the encoder shell, a second anti-interference assembly is arranged on the pins, the first anti-interference assembly comprises a processing part I and a processing part II, and the processing part I and the processing part II are arranged in the encoder shell. Through mutual cooperation of the first anti-interference assembly and the second anti-interference assembly, the anti-interference performance of the rotary encoder is effectively improved, a first processing part and a second processing part in the first anti-interference assembly work cooperatively, a first anti-interference layer in the first processing part can preliminarily filter and process interference signals generated in the encoder, and the anti-interference performance of the rotary encoder is improved. And a conduction column in the second processing part can carry out heat dissipation processing on the rotary encoder, interference signals can be further conducted and released, so that internal interference is reduced, meanwhile, the second anti-interference assembly can protect the interference signals at the pins, and external electromagnetic interference is prevented from entering the encoder through the pins.

Description

Technical Field

[0001] This utility model relates to the field of rotary encoder technology, and more specifically, to an anti-interference structure for a rotary encoder. Background Technology

[0002] A rotary encoder is a sensor that converts rotational position or speed into digital signals. It typically consists of a light source, a code disk, and a photodetector. The code disk has transparent and opaque markings made according to specific encoding rules. When a rotating shaft drives the code disk to rotate, the transparent and opaque portions alternately pass through the photodetector, generating pulse signals. The frequency and number of these pulse signals correspond to the rotational speed and angle of the rotating shaft. By processing and calculating these signals, the motion information of the rotating shaft can be accurately obtained. In many fields such as industrial automation, robotics, and measuring instruments, rotary encoders are key components for achieving precise position and speed control, providing accurate rotational motion data for the efficient and stable operation of equipment.

[0003] However, in practical applications, rotary encoders face many interference factors, with electromagnetic interference being a major issue. In industrial environments, electromagnetic fields generated by various electrical devices may interfere with the signal transmission of rotary encoders. For example, electromagnetic waves generated by nearby motors, frequency converters, and other equipment may enter the encoder's signal lines through inductive coupling, causing signal distortion, pulse loss, or incorrect pulse addition, resulting in inaccurate output rotational position or speed information.

[0004] No effective solutions have yet been proposed to address the problems in the relevant technologies. Utility Model Content

[0005] In view of the problems in the related technologies, this utility model proposes an anti-interference structure for a rotary encoder to overcome the above-mentioned technical problems existing in the existing related technologies.

[0006] Therefore, the specific technical solution adopted by this utility model is as follows:

[0007] An anti-interference structure for a rotary encoder includes an encoder housing, pins evenly spaced at one end of the encoder housing, a first anti-interference component disposed inside the encoder housing, and a second anti-interference component disposed on the pins. The first anti-interference component includes a processing component one and a processing component two, and the second anti-interference component includes a protective component.

[0008] Furthermore, in order to better ensure the anti-interference effect, the processing component includes a processing cavity, which is opened inside the encoder housing. An anti-interference layer is provided inside the processing cavity, and the anti-interference layer is adapted to the processing cavity.

[0009] Furthermore, in order to better ensure the processing effect, the anti-interference layer includes a first processing layer and a second processing layer, which are connected together.

[0010] Furthermore, in order to better ensure the heat dissipation and conduction effect, the second processing component includes a conduction column, which is set between the first processing layer and the second processing layer. The two ends of the conduction column extend from the inside of the processing cavity to the inner wall of the encoder housing and the outer wall of the encoder housing, respectively, and are provided with an intake end and an output end.

[0011] Furthermore, in order to better ensure the intake and output of heat, the intake end and the output end are respectively set on the inner wall of the encoder housing and the outer wall of the encoder housing, and both the intake end and the output end are adapted to the encoder housing. The outer wall of the output end is provided with an anti-static coating.

[0012] Furthermore, in order to better ensure the protection effect of the pin, the protective component includes an anti-interference layer two, which is disposed on the outer wall of the pin, and the outer wall of the anti-interference layer two is provided with a protective electrostatic coating two.

[0013] Furthermore, to better ensure the processing effect, the second anti-interference layer and the second protective electrostatic coating are compatible with the pins.

[0014] The beneficial effects of this invention are as follows: Through the cooperation of the first anti-interference component and the second anti-interference component, the anti-interference performance of the rotary encoder is effectively improved. The processing component one and processing component two in the first anti-interference component work together. The anti-interference layer one in the processing component one can perform preliminary filtering and processing of interference signals generated inside the encoder, while the conductive column in the processing component two can dissipate heat from the rotary encoder, further conducting and releasing interference signals, thereby reducing internal interference. At the same time, the protective component in the second anti-interference component can protect the interference signals at the pins, preventing external electromagnetic interference from entering the encoder through the pins, thus ensuring the stability of encoder signal transmission. This combination of internal and external anti-interference design enables the rotary encoder to work stably in complex electromagnetic environments, avoiding problems such as signal distortion, pulse loss, or incorrect pulse addition caused by electromagnetic interference, improving the accuracy of rotational position and speed information, and enhancing the reliability and applicability of the equipment in fields such as industrial automation, robotics, and measuring instruments. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of an anti-interference structure for a rotary encoder according to an embodiment of the present invention. Figure 1 ;

[0017] Figure 2 This is a schematic diagram of an anti-interference structure for a rotary encoder according to an embodiment of the present invention. Figure 2 ;

[0018] Figure 3 This is a side sectional view of an anti-interference structure for a rotary encoder according to an embodiment of the present invention;

[0019] Figure 4 This is a partial exploded view of the first anti-interference component of an anti-interference structure for a rotary encoder according to an embodiment of the present utility model.

[0020] Figure 5 This is a partial structural diagram of the first anti-interference component of an anti-interference structure for a rotary encoder according to an embodiment of the present invention. Figure 1 ;

[0021] Figure 6 This is a partial structural diagram of the first anti-interference component of an anti-interference structure for a rotary encoder according to an embodiment of the present invention. Figure 2 ;

[0022] Figure 7 This is a schematic diagram of the second anti-interference component structure of an anti-interference structure for a rotary encoder according to an embodiment of the present utility model.

[0023] In the picture:

[0024] 1. Encoder housing; 2. Pins; 3. Processing cavity; 4. Anti-interference layer one; 5. First processing layer; 6. Second processing layer; 7. Conductive post; 8. Input end; 9. Output end; 10. Antistatic coating one; 11. Anti-interference layer two; 12. Antistatic coating two. Detailed Implementation

[0025] 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.

[0026] Example 1:

[0027] like Figures 1-6As shown, an anti-interference structure for a rotary encoder according to an embodiment of the present invention includes an encoder housing 1. The encoder housing 1 is configured as a split type in actual use (not shown in detail in the figure). The surface of the encoder housing 1 with a rotary knob is equipped with an encoder and contacts in actual use to generate different status signals. The contacts are electrically connected to a circuit board and are used to connect or disconnect to generate corresponding electrical signals. The circuit board is an electronic component for receiving signals from the contacts and converting these signals into data that can be used to calculate the rotation direction and speed. One end of the encoder housing 1 has pins 2 at equal distances, and the pins 2 are electrically connected to the circuit board. The inside of the encoder housing 1 is provided with a first anti-interference component, and the pins 2 are provided with a second anti-interference component. The first anti-interference component includes a processing component one and a processing component two.

[0028] The processing component includes a processing cavity 3, which is located inside the encoder housing 1. An anti-interference layer 4 is provided inside the processing cavity 3 and is adapted to the processing cavity 3. The anti-interference layer 4 includes a first processing layer 5 and a second processing layer 6. The first processing layer 5 and the second processing layer 6 are connected together. The first processing layer 5 and the second processing layer 6 can be shielded layers made of materials with high magnetic permeability for preliminary shielding and absorption of interference signals. The first processing layer 5 and the second processing layer 6 can be tightly connected by a reliable connection method such as conductive glue or welding to ensure effective transmission and processing of signals between them.

[0029] The second processing component includes a conductive post 7, which can be made of a metal material with high thermal conductivity, such as copper or aluminum alloy. Its diameter can be designed according to the size of the encoder housing and heat dissipation requirements, generally between 2-5mm. The conductive post 7 can be fixed to the corresponding position of the encoder housing 1 by means of threaded connection, welding or snap-fit, to ensure good thermal contact between it and the encoder housing 1, so as to achieve effective heat dissipation and interference signal conduction. The conductive post 7 is set between the first processing layer 5 and the second processing layer 6. The two ends of the conductive post 7 extend from the inside of the processing cavity 3 to the inner wall and outer wall of the encoder housing 1, respectively, and are provided with a suction end 8 and an output end 9. The suction end 8 and the output end 9 are made of a metal material with good conductivity and diffusion. The suction end 8 and the output end 9 are respectively set on the inner wall and outer wall of the encoder housing 1, and the suction end 8 and the output end 9 are adapted to the encoder housing 1. The outer wall of the output end 9 is provided with an anti-static coating 10.

[0030] Example 2:

[0031] like Figure 1 , Figure 2 , Figure 3 , Figure 7As shown, according to an embodiment of the present invention, an anti-interference structure for a rotary encoder includes a second anti-interference component comprising a protective component. The protective component includes an anti-interference layer 11, which is disposed on the outer wall of the pin 2. The outer wall of the anti-interference layer 11 is provided with a protective electrostatic coating 12. The anti-interference layer 11 and the protective electrostatic coating 12 are adapted to the pin 2. The anti-interference layer 11 can have a multi-layer structure, with the inner layer being a metal foil with good conductivity, such as aluminum foil or copper foil, used for shielding and reflecting electromagnetic interference, and the outer layer being a protective layer made of insulating material, such as polyimide foil. The membrane or Teflon coating is used to protect the metal foil layer and prevent it from being damaged by direct contact with external objects. The second antistatic coating 12 can be an organic coating with antistatic function, such as epoxy resin coating or polyurethane coating doped with conductive particles. Its thickness can be adjusted according to the actual antistatic requirements, generally between 0.1-0.3mm. The second anti-interference layer 11 and the second antistatic coating 12 can be tightly attached to the pin through processes such as wrapping, spraying or plating to ensure good electrical connection and mechanical bonding between them and the pin 2, thereby achieving effective protection for the pin 2.

[0032] To facilitate understanding of the above-mentioned technical solutions of this utility model, the working principle or operation method of this utility model in actual process will be described in detail below.

[0033] In summary, with the help of the above-mentioned technical solution of this utility model, the anti-interference layer 4 in the processing component 1 inside the encoder housing 1 can perform preliminary filtering and processing of interference signals generated inside the encoder. The anti-interference layer 4 includes a first processing layer 5 and a second processing layer 6, which are made of materials with high magnetic permeability and can shield and absorb interference signals. The two are tightly combined to ensure effective signal transmission and processing. The conduction column 7 in the processing component 2 is set between the first processing layer 5 and the second processing layer 6. The suction end 8 of the conduction column 7 is located on the inner wall of the encoder housing 1 and can absorb internal heat and interference signals. Then, the heat and interference signals are conducted to the output end 9 through the conduction column 7. The output end 9 is located on the outer wall of the encoder housing 1. The antistatic coating 10 on its outer wall can prevent the influence of static electricity on the conduction of interference signals, realize heat dissipation and interference signal release, and reduce internal interference.

[0034] The anti-interference layer 11 in the protective component on pin 2 is set on the outer wall of pin 2. The inner layer of metal foil with good conductivity can shield and reflect electromagnetic interference, and the outer layer of insulating material protects the metal foil layer. The protective electrostatic coating 12 on the outer wall of the anti-interference layer 11 can prevent static electricity from affecting pin 2. The two are tightly attached to pin 2 to prevent external electromagnetic interference from entering the encoder through pin 2 and ensure stable signal transmission.

[0035] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An anti-interference structure for a rotary encoder, comprising an encoder housing (1) and equally spaced pins (2) at one end of the encoder housing (1), characterized in that, The encoder housing (1) is provided with a first anti-interference component inside, and a second anti-interference component is provided on the pin (2). The first anti-interference component includes a processing component one and a processing component two, and the second anti-interference component includes a protective component.

2. The anti-interference structure for a rotary encoder according to claim 1, characterized in that, The processing component includes a processing cavity (3), which is located inside the encoder housing (1). An anti-interference layer (4) is provided inside the processing cavity (3), and the anti-interference layer (4) is adapted to the processing cavity (3).

3. The anti-interference structure for a rotary encoder according to claim 2, characterized in that, The anti-interference layer 1 (4) includes a first processing layer (5) and a second processing layer (6), with the first processing layer (5) and the second processing layer (6) connected together.

4. The anti-interference structure for a rotary encoder according to claim 3, characterized in that, The second processing component includes a transmission column (7), which is disposed between the first processing layer (5) and the second processing layer (6). The two ends of the transmission column (7) extend from the inside of the processing cavity (3) to the inner wall of the encoder housing (1) and the outer wall of the encoder housing (1) respectively, and are provided with an intake end (8) and an output end (9).

5. The anti-interference structure for a rotary encoder according to claim 4, characterized in that, The suction end (8) and the output end (9) are respectively located on the inner wall of the encoder housing (1) and the outer wall of the encoder housing (1), and the suction end (8) and the output end (9) are adapted to the encoder housing (1). The outer wall of the output end (9) is provided with an antistatic coating (10).

6. The anti-interference structure for a rotary encoder according to claim 1, characterized in that, The protective component includes an anti-interference layer 2 (11), which is disposed on the outer wall of the pin (2), and the outer wall of the anti-interference layer 2 (11) is provided with a protective electrostatic coating 2 (12).

7. The anti-interference structure for a rotary encoder according to claim 6, characterized in that, The second anti-interference layer (11) and the second protective electrostatic coating (12) are compatible with the pin (2).

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