Moistureproof encoder

Abstract

The utility model relates to the technical field of encoders, and discloses a moisture-proof encoder, which comprises an input port fixedly connected to the right side surface of an outer shell, an upper end plate detachably connected to the upper part of the outer shell, an extrusion ring plate fixedly connected to the outer side of the upper end plate, and an annular shell fixedly connected to the outer side of the outer shell. A sealing rubber ring is inserted into the annular shell, a fixed annular plate is fixedly connected to the outer side of the outer shell, a rotating shell is rotationally connected to the outer side of the fixed annular plate, and a strip-shaped moisture-proof agent is arranged in the rotating shell. According to the utility model, through the cooperation of the extrusion annular plate, the annular housing, the fixed annular plate, the rotating housing, the strip-shaped moisture-proof agent and other structures, the sealing rubber ring can be compressed to seal the connection part of the upper end plate and the outer housing, thereby ensuring the sealing filling effect on the gap, absorbing the moisture outside the encoder, and improving the sealing performance of the encoder. And erosion of moisture to the encoder is reduced.

Description

Technical Field

[0001] This utility model relates to the field of encoder technology, and in particular to a moisture-proof encoder. Background Technology

[0002] An encoder is a device or software that converts information from one format or code to another. Its main function is to convert input analog or digital signals into specific codes or data formats for transmission, storage, or further processing. In the application of encoders, water ingress and moisture are major factors that damage them. Therefore, moisture-proof structures are set inside or outside the encoder to reduce moisture damage.

[0003] A search revealed Chinese Patent Publication No. CN211429781U, which discloses a moisture-proof encoder. The encoder body is sealed with a moisture-proof housing and a rear cover to achieve waterproofing. A housing rotation shaft is provided for insertion into the encoder body's rotation shaft, facilitating easy assembly and disassembly without affecting the encoder's function. A support block is also provided to support the encoder body and prevent vibration during operation. Finally, moisture-proof material is filled into the gaps to achieve moisture protection. The structure is simple, easy to use, and practical.

[0004] In actual use, when the encoder described above only has a matching sealing strip structure inside the housing for sealing and moisture prevention, if the external temperature changes significantly and the housing undergoes large thermal expansion and contraction deformation, gaps will appear at the connection. The sealing strip that was originally matched will not fit perfectly when the housing deforms, which will affect the moisture-proof performance of the encoder. Therefore, a moisture-proof encoder is proposed to solve the above problems. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides a moisture-proof encoder, which aims to improve the problem that the existing technology, which only sets a suitable sealing strip inside the housing for sealing and moisture prevention, is greatly affected by the external ambient temperature, and is prone to affecting the sealing performance.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a moisture-proof encoder, comprising a housing, an input port fixedly connected to the right side surface of the housing, an upper end plate detachably connected to the top of the housing, a drive shaft disposed above the upper end plate, a compression ring plate fixedly connected to the outer side of the upper end plate, an annular housing fixedly connected to the outer side of the housing, a sealing rubber ring inserted inside the annular housing, a fixing ring plate fixedly connected to the outer side of the housing, a rotating housing rotatably connected to the outer side of the fixing ring plate, a through groove formed on the front surface of the rotating housing, a vent hole formed on the outer surface of the rotating housing, a strip-shaped desiccant disposed inside the rotating housing, and a limit unit disposed on the outer side of the fixing ring plate for limiting the strip-shaped desiccant.

[0007] As a further description of the above technical solution:

[0008] The bottom surface of the annular shell is lower than the upper surface of the outer shell, and the bottom surface of the extrusion ring plate and the bottom surface of the upper end plate are on the same horizontal plane.

[0009] As a further description of the above technical solution:

[0010] The upper surface of the sealing rubber ring is higher than the upper surface of the annular shell.

[0011] As a further description of the above technical solution:

[0012] The limiting unit includes an annular magnetic strip, which is fixedly connected to the outer wall surface of the fixed ring plate, and an iron strip is fixedly connected to the inner wall surface of the strip-shaped desiccant.

[0013] As a further description of the above technical solution:

[0014] An inclined plate is fixedly connected to the inner left wall surface of the channel, and a pull rope is fixedly connected to the outer wall surface of the strip-shaped desiccant.

[0015] As a further description of the above technical solution:

[0016] The inclined plate is tilted to the right rear, and the back of the inclined plate is in contact with the front surface of the fixing ring plate.

[0017] As a further description of the above technical solution:

[0018] The upper and lower surfaces of the strip-shaped desiccant are in contact with the inner surfaces of the upper and lower sides of the rotating housing.

[0019] As a further description of the above technical solution:

[0020] The height of the channel is adapted to the height of the strip-shaped desiccant.

[0021] This utility model has the following beneficial effects:

[0022] 1. In this utility model, through the combination of the compression ring plate, annular shell, fixed ring plate, rotating shell and strip-shaped desiccant, the compressible sealing rubber ring seals the connection between the upper plate and the outer shell, and leaves a compression margin for the sealing rubber ring. Regardless of thermal expansion or cold contraction, it can ensure the sealing and filling effect of the gap, and can absorb the moisture on the outside of the encoder, reducing the corrosion of the encoder by moisture, achieving double sealing and moisture protection, and improving the overall moisture protection effect of the encoder.

[0023] 2. In this utility model, by combining the inclined plate and the pull rope, when it is necessary to disassemble and replace the strip-shaped desiccant, the end of the strip-shaped desiccant can be quickly fixed and the strip-shaped desiccant can be pried, so that the iron strip can be quickly separated from the annular magnetic strip, and then the strip-shaped desiccant can be quickly moved out of the rotating shell to complete the replacement. The structure is simple and the operation is convenient. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of a moisture-proof encoder proposed in this utility model;

[0025] Figure 2 This is a schematic diagram of a moisture-proof encoder proposed in this utility model after removing the extrusion ring plate, rotating housing, and strip-shaped desiccant.

[0026] Figure 3 This utility model proposes a moisture-proof encoder. Figure 2 A partial diagram of point A;

[0027] Figure 4 This is a schematic diagram of the fixing ring plate of a moisture-proof encoder proposed in this utility model;

[0028] Figure 5 This is a schematic diagram showing the disassembled fixed ring plate of a moisture-proof encoder proposed in this utility model.

[0029] Legend:

[0030] 1. Outer shell; 2. Input port; 3. Upper end plate; 4. Drive shaft; 5. Extrusion ring plate; 6. Annular shell; 7. Sealing rubber ring; 8. Fixed ring plate; 9. Rotating shell; 10. Through groove; 11. Vent hole; 12. Strip-shaped desiccant; 121. Annular magnetic strip; 122. Iron strip; 13. Inclined plate; 14. Pull rope. Detailed Implementation

[0031] 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.

[0032] Reference Figures 1-3 This utility model provides an embodiment of a moisture-proof encoder, including a housing 1. An input port 2 is fixedly connected to the right side surface of the housing 1. An upper end plate 3 is detachably connected to the top of the housing 1. A transmission shaft 4 is arranged above the upper end plate 3. The transmission shaft 4 transmits the rotational motion of an external power source (such as a motor, mechanical device, etc.) to the detection element inside the encoder. This is the basis for the encoder to work normally, ensuring that the encoder can monitor changes in rotational motion in real time. The above structure is a prior art in this field and will not be described in detail here. A compression ring plate 5 is fixedly connected to the outer side of the upper end plate 3. When the upper end plate 3 is installed and moved, it will drive the compression ring plate 5 to move synchronously. The bottom surface of the compression ring plate 5 is at the same level as the bottom surface of the upper end plate 3. An annular shell 6 is fixedly connected to the outer side of the housing 1. The bottom surface of the annular shell 6 is lower than the upper surface of the housing 1. A sealing rubber ring 7 is inserted into the inside of the annular shell 6. The upper surface of the sealing rubber ring 7 is higher than the upper surface of the annular shell 6.

[0033] When the upper end plate 3 is not installed, the sealing rubber ring 7 is not compressed. At this time, the upper surface of the sealing rubber ring 7 is higher than the upper surface of the housing 1. When the upper end plate 3 is installed above the housing 1, it will drive the compression ring plate 5 to compress the sealing rubber ring 7, causing the sealing rubber ring 7 to deform and seal the gap between the upper end plate 3 and the housing 1. When the housing expands due to thermal expansion, the sealing rubber ring 7 will only recover part of the deformation and can continue to maintain the sealing effect at the gap. When the housing as a whole shrinks due to low temperature, the sealing rubber ring 7 can also continue to be compressed and deformed to fill the gap more precisely, ensuring the seal at the gap and preventing moisture in the air from entering the interior of the housing 1 and affecting the overall moisture-proof effect of the encoder.

[0034] Reference Figures 3-5A fixed ring plate 8 is fixedly connected to the outer side of the outer shell 1. A rotating housing 9 is rotatably connected to the outer side of the fixed ring plate 8. The rotating housing 9 can rotate around the fixed ring plate 8. A through groove 10 is opened on the front surface of the rotating housing 9. A vent hole 11 is opened on the outer surface of the rotating housing 9. Outside air can enter the interior of the rotating housing 9 through the vent hole 11. A strip-shaped desiccant 12 is installed inside the rotating housing 9. The upper and lower sides of the strip-shaped desiccant 12 are in contact with the upper and lower inner walls of the rotating housing 9. The height of the through groove 10 is adapted to the height of the strip-shaped desiccant 12. The strip-shaped desiccant 12 can enter the interior of the rotating housing 9 through the through groove 10 to complete the installation. The strip-shaped desiccant 12 can absorb moisture in the environment around the encoder, reduce local humidity, and reduce the corrosion of the encoder by moisture. The rotating housing 9 can provide physical protection for the desiccant to prevent it from being damaged by collision, friction or squeezing. The strip-shaped desiccant 12 can absorb moisture in the outside air through the through groove 10 and the vent hole 11.

[0035] A limiting unit is provided on the outer side of the fixed ring plate 8. The limiting unit includes an annular magnetic strip 121, which is fixedly connected to the outer wall surface of the fixed ring plate 8. An iron strip 122 is fixedly connected to the inner wall surface of the strip-shaped desiccant 12. The iron strip 122 can magnetically attract the annular magnetic strip 121 to limit the strip-shaped desiccant 12, so that the strip-shaped desiccant 12 can be used stably.

[0036] When installing the strip-shaped desiccant 12, the end of the strip-shaped desiccant 12 can be inserted into the rotating housing 9 first, so that the iron strip 122 and the annular magnetic strip 121 are partially magnetically attracted and limited. Then, rotating the rotating housing 9 will drive the through groove 10 to rotate, so that the strip-shaped desiccant 12 can quickly pass through the through groove 10 and enter the rotating housing 9 to complete the installation. There is no need to forcefully push the strip-shaped desiccant 12 for installation, which can improve the installation efficiency. After the installation is completed, the iron strip 122 will be magnetically attracted to the annular magnetic strip 121 to ensure the stability of the strip-shaped desiccant 12 during use.

[0037] Reference Figures 4-5 An inclined plate 13 is fixedly connected to the inner left side of the through groove 10. The inclined plate 13 is tilted to the right rear. The back of the inclined plate 13 is in contact with the front side of the fixed ring plate 8. A pull rope 14 is fixedly connected to the outer wall of the strip-shaped desiccant 12. The strip-shaped desiccant 12 can be pulled or limited by the pull rope 14. When the strip-shaped desiccant 12 needs to be disassembled and replaced, the pull rope 14 can be held still, and the rotating housing 9 can be rotated counterclockwise to drive the inclined plate 13 to rotate synchronously. During the rotation, the inclined plate 13 will scrape the strip-shaped desiccant 12, so that the iron strip 122 can be quickly separated from the annular magnetic strip 121. At this time, the strip-shaped desiccant 12 can quickly leave the interior of the rotating housing 9 through the through groove 10, which is convenient for disassembly. The structure is simple and the operation is easy.

[0038] Working principle: The end of the strip-shaped desiccant 12 is inserted into the interior of the rotating housing 9 through the through groove 10, so that the iron strip 122 and the annular magnetic strip 121 are partially magnetically attracted and limited. Rotating the rotating housing 9 allows the strip-shaped desiccant 12 to quickly enter the interior of the rotating housing 9 through the through groove 10 with the end restricted, thus completing the installation. When the strip-shaped desiccant 12 is completely inside the rotating housing 9, the iron strip 122 will magnetically attract the annular magnetic strip 121, further limiting the strip-shaped desiccant 12. Subsequently, the strip-shaped desiccant 12 can absorb moisture in the air outside the encoder through the through groove 10 and the vent hole 11, reducing the corrosion of the encoder by moisture.

[0039] The upper end plate 3 can then be installed. When the upper end plate 3 is installed, it will drive the compression ring plate 5 to move synchronously and compress the sealing rubber ring 7, so that the sealing rubber ring 7 is compressed and deformed to seal and fill the gap between the upper end plate 3 and the outer shell 1, and leave a margin for compression of the sealing rubber ring 7. Regardless of whether the encoder as a whole undergoes thermal expansion or cold contraction, the sealing rubber ring 7 can deform accordingly to ensure the sealing and filling effect of the gap.

[0040] When the strip-shaped desiccant 12 needs to be disassembled and replaced, pull the pull rope 14 to limit the end of the strip-shaped desiccant 12, rotate the housing 9 to move the inclined plate 13 to scrape the strip-shaped desiccant 12, so that the strip-shaped desiccant 12 can be quickly removed from the through groove 10 to complete the disassembly. The operation is simple.

[0041] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. 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. A moisture resistant encoder comprising an outer housing (1) characterised in that: The right side surface of the outer shell (1) is fixedly connected with an input port (2), the upper side of the outer shell (1) is detachably connected with an upper end plate (3), the upper side of the upper end plate (3) is provided with a transmission shaft (4), the outer side of the upper end plate (3) is fixedly connected with an extrusion ring plate (5), the outer side of the outer shell (1) is fixedly connected with an annular shell (6), the inside of the annular shell (6) is inserted with a sealing rubber ring (7), the outer side of the outer shell (1) is fixedly connected with a fixed ring plate (8), the outer side of the fixed ring plate (8) is rotatably connected with a rotating shell (9), the front side surface of the rotating shell (9) is provided with a through slot (10), the outer surface of the rotating shell (9) is provided with a breathable hole (11), the inside of the rotating shell (9) is provided with a strip-shaped moisture-proof agent (12), the outer side of the fixed ring plate (8) is provided with a limiting unit, and the limiting unit is used for limiting the strip-shaped moisture-proof agent (12).

2. A moisture resistant encoder according to claim 1, wherein: The bottom surface of the annular shell (6) is lower than the upper surface of the outer shell (1), and the bottom surface of the extrusion ring plate (5) is located on the same horizontal plane as the bottom surface of the upper end plate (3).

3. A moisture resistant encoder according to claim 1, wherein: The upper surface of the sealing rubber ring (7) is higher than the upper surface of the annular shell (6).

4. The moisture resistant encoder of claim 1, wherein: The limiting unit comprises an annular magnetic strip (121), the annular magnetic strip (121) is fixedly connected to the outer wall surface of the fixed ring plate (8), and the inner wall surface of the strip-shaped moisture-proof agent (12) is fixedly connected with an iron strip (122).

5. The moisture resistant encoder of claim 1, wherein: The left side inner wall surface of the through slot (10) is fixedly connected with an inclined plate (13), and the outer wall surface of the strip-shaped moisture-proof agent (12) is fixedly connected with a pull rope (14).

6. A moisture resistant encoder according to claim 5, wherein: The whole of the inclined plate (13) is inclined to the right rear, and the back surface of the inclined plate (13) is attached to the front side surface of the fixed ring plate (8).

7. A moisture resistant encoder according to claim 1, wherein: The upper surface of the strip-shaped moisture-proof agent (12) is attached to the upper and lower inner wall surfaces of the rotating shell (9).

8. A moisture resistant encoder according to claim 1, wherein: The height of the through slot (10) is adapted to the height of the strip-shaped moisture-proof agent (12).

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