An eddy current sensor

Abstract

The utility model relates to an eddy current sensor relates to sensor technical field for solving the problem of insufficient dustproof and oil stain resistance of existing eddy current sensor, and the utility model discloses an eddy current sensor, including sensor body, dustproof part, outer sealing ring and inner sealing ring, sensor body has the distribution of arc main part, convex portion and data joint in proper order, and arc main part, convex portion and data joint fixed connection, the inside of dustproof part forms and annular sleeve surface of abutment plane, is seted up with installation hole on dustproof part, and installation hole penetrates abutment plane, and the end face of abutment plane of dustproof part is away from arc main part and is abutted with convex portion, and annular sleeve surface is sleeved on the torus of convex portion, and data joint is located in installation hole, the outer ring of annular sleeve surface of dustproof part is provided with outer annular groove, and sealing ring is seted up in outer annular groove, and the inner ring of abutment plane and is located in installation hole is provided with inner annular groove, and inner sealing ring is seted up in inner annular groove.

Description

Technical Field

[0001] This application relates to the field of sensor technology, and in particular to an eddy current sensor. Background Technology

[0002] Eddy current sensors are non-contact measurement sensors based on the eddy current effect. They are widely used in industrial equipment monitoring, machinery manufacturing, aerospace and other fields, and can be used to measure parameters such as displacement, vibration and rotation speed of objects.

[0003] In practical applications, eddy current sensors often come into contact with impurities such as dust and oil. If these impurities enter the sensor, they will affect the measurement accuracy and even shorten the sensor's lifespan. Dust and oil are more likely to enter the data connector of the eddy current sensor. Utility Model Content

[0004] This application provides an eddy current sensor to solve the problem of insufficient dust and oil resistance of existing eddy current sensors.

[0005] This application provides an eddy current sensor, including a sensor body, a dustproof component, an outer sealing ring, and an inner sealing ring. The sensor body has an arc-shaped main body, a protruding portion, and a data connector arranged sequentially, and the arc-shaped main body, the protruding portion, and the data connector are fixedly connected. The dustproof component has an abutment plane and an annular sleeve surface inside, and a mounting hole is provided on the dustproof component, the mounting hole passing through the abutment plane. The abutment plane of the dustproof component abuts against the end face of the protruding portion away from the arc-shaped main body, and the annular sleeve surface is sleeved on the annular surface of the protruding portion. The data connector is located inside the mounting hole. An outer annular groove is provided on the outer annular sleeve surface of the dustproof component, and the sealing ring is disposed in the outer annular groove. An inner annular groove is provided on the abutment plane and outside the mounting hole, and the inner sealing ring is disposed in the inner annular groove, and the inner sealing ring abuts against the protruding portion of the sensor body.

[0006] In some embodiments of this application, two outer sealing rings are provided, and two outer annular grooves are provided. The two outer annular grooves are distributed at intervals along the extension direction of the annular sleeve surface, and the two outer sealing rings are respectively disposed in the two outer annular grooves.

[0007] In some embodiments of this application, multiple ribs are provided on the outer surface of the dustproof component, and the ribs are provided in the through portion of the outer annular groove.

[0008] In some embodiments of this application, the dustproof component is further provided with two positioning holes, which are located on both sides of the mounting hole, and are located outside the annular sleeve surface along the extension direction perpendicular to the annular sleeve surface.

[0009] In some embodiments of this application, the protruding portion is provided with two fixing holes on both sides of the data connector, and the dustproof component is provided with two mating holes on both sides of the mounting hole. The two mating holes communicate with the two fixing holes and are located inside the inner annular groove. The eddy current sensor also includes two fixing components, which pass through the mating holes and extend into the corresponding fixing holes to fix the dustproof component and the sensor body.

[0010] In some embodiments of this application, the fastener is a threaded component and the fixing hole is a threaded hole.

[0011] In some embodiments of this application, the dustproof component further includes two metal rings, which are respectively disposed outside two mating holes and embedded inside the dustproof component.

[0012] In some embodiments of this application, the mounting hole and the data connector are clearance-fitted.

[0013] In some embodiments of this application, a gap is provided between the dustproof component and the arc-shaped body.

[0014] Compared with the prior art, this application has the following beneficial effects:

[0015] This invention forms a double-sealing structure by setting an inner sealing ring and an outer sealing ring. The inner sealing ring can prevent dust and oil from entering through the gap between the contact surface and the protrusion, while the outer sealing ring can prevent external impurities from entering through the gap between the annular sleeve surface and the external structure, significantly improving the sensor's dustproof and oilproof capabilities.

[0016] Two outer sealing rings are provided to further enhance the sealing effect and enable it to adapt to harsher working environments.

[0017] The ribs on the dustproof components enhance their structural strength and extend their service life.

[0018] The positioning holes facilitate the installation and positioning of the sensor, improving installation efficiency and accuracy.

[0019] By fixing the dustproof component to the sensor body with fasteners, the stability of the sealing structure is ensured, and sealing failure caused by loosening of the dustproof component is avoided. Attached Figure Description

[0020] The accompanying drawings are provided to further illustrate the technical solution of this utility model and constitute a part of the specification. They are used together with the embodiments of this application to explain the technical solution of this utility model and do not constitute a limitation on the technical solution of this utility model.

[0021] Figure 1 This is a schematic diagram of an eddy current sensor provided in an embodiment of this application.

[0022] Figure 2 This is a cross-sectional schematic diagram of an eddy current sensor provided in an embodiment of this application.

[0023] Reference numerals: 1-Sensor body; 11-Arc-shaped body; 12-Protruding part; 121-Fixing hole; 13-Data connector; 2-Dustproof component; 21-Positioning hole; 22-Matching hole; 23-Metal ring; 24-Outer annular groove; 25-Rib; 26-Abutting surface; 27-Annular sleeve surface; 28-Inner annular groove; 29-Mounting hole; 3-Outer sealing ring; 4-Inner sealing ring. Detailed Implementation

[0024] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0025] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0026] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0027] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "connected" and "linked" should be interpreted broadly, for example, as a fixed connection, a detachable connection, or an integral connection. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances. Furthermore, when describing pipelines, the terms "connected" and "linked" as used in this application have the meaning of establishing electrical connection. The specific meaning needs to be understood in conjunction with the context.

[0028] In the embodiments of this application, the terms "exemplary" or "for example" are used to indicate that something is an example, illustration, or description. Any embodiment or design that is described as "exemplary" or "for example" in the embodiments of this application should not be construed as being more preferred or advantageous than other embodiments or design. Specifically, the use of the terms "exemplary" or "for example" is intended to present the relevant concepts in a specific manner.

[0029] Eddy current sensors are non-contact measurement sensors based on the eddy current effect. They are widely used in industrial equipment monitoring, machinery manufacturing, aerospace and other fields, and can be used to measure parameters such as displacement, vibration and rotation speed of objects.

[0030] In practical applications, eddy current sensors often come into contact with dust, oil, and other impurities. If these impurities enter the sensor, they can affect its measurement accuracy and even shorten its lifespan. Existing eddy current sensors have inadequate sealing designs, offering weak dust and oil protection, making it difficult to meet the requirements for long-term stable operation in harsh environments.

[0031] Therefore, please refer to Figure 1 This application provides an eddy current sensor, including a sensor body 1, a dustproof component 2, an outer sealing ring 3, and an inner sealing ring 4.

[0032] Please refer to Figure 1 The sensor body 1 has an arc-shaped main body 11, a protruding part 12, and a data connector 13 arranged sequentially, which are fixedly connected. The arc-shaped main body 11 is in the shape of an arc plate, and its curvature is designed according to the measurement requirements. It is mainly used to sense eddy current signals. The protruding part 12 is a cylindrical structure. One end is fixedly connected to the end of the arc-shaped main body 11, and the other end is fixedly connected to the data connector 13. It plays a connecting and supporting role and can also accommodate the PCB board. The data connector 13 is a square column and is used to transmit the signal sensed by the sensor to external devices. It is made of metal to ensure the stability of signal transmission. The data connector 13 can be equipped with pins that can be soldered to the PCB board.

[0033] Please refer to Figure 2The dustproof component 2 has an internal abutment plane 26 and an annular sleeve surface 27. An installation hole 29 is provided on the dustproof component 2, passing through the abutment plane 26. The abutment plane 26 of the dustproof component 2 abuts against the end face of the protruding portion 12 away from the arc-shaped main body 11. The annular sleeve surface 27 is fitted onto the annular surface of the protruding portion 12. The data connector 13 is located within the installation hole 29. The dustproof component 2 can be made entirely of high-strength plastic material, possessing good wear resistance and corrosion resistance. The abutment plane 26 is a flat plane that fits tightly against the end face of the protruding portion 12, providing a preliminary seal. The annular sleeve surface 27 is a cylindrical inner surface adapted to the annular surface of the protruding portion 12, tightly enclosing the annular surface of the protruding portion 12. The shape of the installation hole 29 is adapted to the data connector 13, facilitating its passage.

[0034] Please refer to Figure 1 and Figure 2 An outer annular groove 24 is provided on the outer annular surface of the annular sleeve surface 27 of the dustproof component 2, and the outer sealing ring 3 is disposed in the outer annular groove 24. The outer annular groove 24 is arranged along the circumferential direction of the outer annular surface of the annular sleeve surface 27, and its cross-sectional shape is adapted to the outer sealing ring 3. The outer sealing ring 3 is made of rubber, which has good elasticity and sealing performance, and can tightly fit the external installation structure to prevent external dust and oil from entering through the gap between the annular sleeve surface 27 and the external structure.

[0035] Please refer to Figure 2 An inner annular groove 28 is provided on the abutting plane 26 and outside the mounting hole 29. An inner sealing ring 4 is disposed in the inner annular groove 28 and abuts against the protruding portion 12 of the sensor body 1. The inner annular groove 28 is disposed on the abutting plane 26 along the outer periphery of the mounting hole 29. The inner sealing ring 4 is also made of rubber and abuts tightly against the end face of the protruding portion 12, further preventing dust and oil from entering the sensor interior through the gap between the abutting plane 26 and the protruding portion 12.

[0036] Please refer to Figure 1 and Figure 2 This application, by configuring a dustproof component 2 outside the eddy current sensor, and by using the dustproof component 2, an inner sealing ring 4 disposed inside the sensor body 1, and an outer sealing ring 3 located outside the dustproof component 2, simultaneously prevents dust and oil from entering the sensor body 1 from the data connector 13. Furthermore, the external sealing is achieved by the sealing ring outside the dustproof component 2 abutting against the mounting area of ​​the target element, thereby enhancing the sensor's dust and oil resistance, improving its service life, and overcoming the problem of poor oil resistance in existing eddy current sensors.

[0037] Please refer to Figure 1In some examples, two outer sealing rings 3 and two outer annular grooves 24 are provided. The two outer annular grooves 24 are spaced apart along the extension direction of the annular sleeve surface 27, and the two outer sealing rings 3 are respectively disposed in the two outer annular grooves 24. The arrangement of two outer sealing rings 3 can form a double seal, which enhances the sealing effect and further improves the ability to prevent oil and dust.

[0038] For example, the two outer sealing rings 3 can be exactly the same, and the protrusions can also be exactly the same, while the two outer sealing rings 3 can be distributed in parallel.

[0039] Please refer to Figure 1 In some examples, multiple ribs 25 are provided on the outer surface of the dustproof component 2, and the outer annular groove 24 passes through a portion of the ribs 25. The ribs 25 are axially distributed along the outer surface of the dustproof component 2 and are made of the same plastic material as the dustproof component 2, which can enhance the structural strength of the dustproof component 2 and prevent deformation of the dustproof component 2 during installation and use. The fact that the outer annular groove 24 passes through a portion of the ribs 25 does not affect the reinforcing effect of the ribs 25 on the overall strength of the dustproof component 2.

[0040] For example, the ribs 25 can be arc-shaped, square, or prismatic; the ribs 25 can be distributed perpendicularly to each other or intersecting in a mesh-like distribution.

[0041] Please refer to Figure 2 In some examples, the dustproof component 2 is also provided with two positioning holes 21. The two positioning holes 21 are located on both sides of the mounting hole 29, and along the extension direction perpendicular to the annular sleeve surface 27, the positioning holes 21 are located outside the annular sleeve surface 27. The positioning holes 21 are circular through holes, used to position the dustproof component 2 when installing the sensor, ensuring the accuracy of the sensor installation position and improving installation efficiency.

[0042] For example, a metal collar can be configured on the positioning hole 21 to improve the strength of the positioning hole 21 and prevent local breakage or strength failure during installation.

[0043] Please refer to Figure 2 In some examples, the protrusion 12 has two fixing holes 121 on both sides of the data connector 13, and the dustproof component 2 has two mating holes 22 on both sides of the mounting hole 29. The two mating holes 22 communicate with the two fixing holes 121 and are located inside the inner annular groove 28. The eddy current sensor also includes two fixing members that pass through the mating holes 22 and extend into the corresponding fixing holes 121 to fix the dustproof component 2 and the sensor body 1. The fixing holes 121 are blind holes, and the mating holes 22 are through holes. The fixing members firmly connect the dustproof component 2 and the sensor body 1, preventing the dustproof component 2 from loosening during use and ensuring the stability of the sealing effect.

[0044] In some examples, the fastener is a threaded component, and the fixing hole 121 is a threaded hole. Threaded connections are characterized by a strong connection and easy disassembly, facilitating sensor maintenance and component replacement.

[0045] Please refer to Figure 1 In some examples, the dustproof component 2 also includes two metal rings 23, which are respectively disposed outside the two mating holes 22 and embedded inside the dustproof component 2. The metal rings 23 are made of copper or steel, which can enhance the structural strength at the mating holes 22 and prevent the fasteners from damaging the dustproof component 2 during tightening.

[0046] Both ends of the metal ring 23 can extend partially onto the surface of the dustproof component 2, thereby achieving contact with the threaded component and preventing the threaded component from sinking into the dustproof component 2. The metal ring 23 and the dustproof component 2 can be integrally formed, thus ensuring a stable connection between the two.

[0047] In some examples, the mounting hole 29 is clearance-fitted with the data connector 13. The clearance fit prevents friction and compression between the data connector 13 and the mounting hole 29, preventing damage to the data connector 13, and also facilitates the installation and removal of the data connector 13.

[0048] In some examples, a gap is provided between the dustproof component 2 and the arc-shaped body 11. This gap can prevent the dustproof component 2 and the arc-shaped body 11 from colliding and rubbing against each other during sensor operation, thus protecting the structural integrity of both.

[0049] This application provides Embodiment 1, please refer to it. Figure 1 An eddy current sensor includes a sensor body 1, a dustproof component 2, an outer sealing ring 3, and an inner sealing ring 4.

[0050] The arc-shaped main body 11 of the sensor body 1 is an arc-shaped stainless steel plate with an arc of 60 degrees. The protruding part 12 is a cylindrical aluminum alloy structure. The data connector 13 is a square copper interface. The arc-shaped main body 11, the protruding part 12 and the data connector 13 are fixedly connected by welding.

[0051] The dustproof part 2 is made of polyamide. The contact surface 26 is a circular plane. The inner diameter of the annular sleeve surface 27 is matched with the outer diameter of the protrusion 12. The mounting hole 29 is a hole with a rectangular cross section.

[0052] Two outer annular grooves 24 are provided, which are distributed at 3mm intervals along the extension direction of the annular sleeve surface 27. The cross-section of the outer annular groove 24 is circular, and the outer sealing ring 3 is made of nitrile rubber and is compatible with the outer annular groove 24.

[0053] The inner annular groove 28 is circular with a square cross-section and a diameter of 2mm. The inner sealing ring 4 is made of nitrile rubber with a diameter of 2mm, which is compatible with the inner annular groove 28 and tightly abuts against the end face of the protrusion 12.

[0054] Four ribs 25 are provided on the outer surface of the dustproof component 2. The cross-section of the ribs 25 is square with a side length of 2mm. They are evenly distributed along the axial direction of the dustproof component 2. The outer annular groove 24 passes through two of the ribs 25.

[0055] The dustproof component 2 is provided with two positioning holes 21. The positioning holes 21 are circular through holes with a diameter of 5mm. They are located on both sides of the mounting hole 29, 5mm away from the edge of the mounting hole 29. Along the extension direction perpendicular to the annular sleeve surface 27, the positioning holes 21 are located outside the annular sleeve surface 27.

[0056] The protruding part 12 is provided with two fixing holes 121 on both sides of the data connector 13. The fixing holes 121 are M4 threaded holes with a depth of 10mm. The dustproof part 2 is provided with two mating holes 22 on both sides of the mounting hole 29. The mating holes 22 are through holes with a diameter of 4.2mm. The two mating holes 22 are connected to the two fixing holes 121 and are located inside the inner annular groove 28. The eddy current sensor also includes two M4 stainless steel bolts as fasteners. The bolts pass through the mating holes 22 and extend into the corresponding fixing holes 121 to fix the dustproof part 2 and the sensor body 1.

[0057] A metal ring 23 is provided on the outside of each of the two mating holes 22 of the dustproof component 2. The metal ring 23 is made of copper, with an outer diameter of 8mm, an inner diameter of 4.2mm, and a thickness of 2mm, and is embedded in the dustproof component 2. The gap between the mounting hole 29 and the data connector 13 is 0.5mm. The gap between the dustproof component 2 and the arc-shaped body 11 is 2mm.

[0058] This application provides a second embodiment of an eddy current sensor, which includes a sensor body 1, a dustproof component 2, an outer sealing ring 3, and an inner sealing ring 4.

[0059] The arc-shaped main body 11 of the sensor body 1 is an arc-shaped iron plate with an arc of 90 degrees. The protruding part 12 is a cylindrical cast iron structure. The data connector 13 is a square iron interface. The arc-shaped main body 11, the protruding part 12 and the data connector 13 are fixedly connected by bolts.

[0060] The dustproof part 2 is made of polycarbonate. The contact surface 26 is an annular plane. The inner diameter of the annular sleeve surface 27 is matched with the outer diameter of the protrusion 12. The mounting hole 29 is a square hole.

[0061] Two outer annular grooves 24 are provided, which are distributed at intervals of 8mm along the extension direction of the annular sleeve surface 27. The cross-section of the outer annular groove 24 is square. The outer sealing ring 3 is made of fluororubber and has a square cross-section, which is compatible with the outer annular groove 24.

[0062] The inner annular groove 28 is circular, and the inner sealing ring 4 is made of fluororubber with a square cross-section and a side length of 3mm. It is adapted to the inner annular groove 28 and tightly abuts against the end face of the protruding part 12.

[0063] Six ribs 25 are provided on the outer surface of the dustproof component 2. The cross-section of the ribs 25 is circular with a diameter of 3mm. They are evenly distributed along the axial direction of the dustproof component 2. The outer annular groove 24 passes through three of the ribs 25.

[0064] The dustproof component 2 is provided with two positioning holes 21. The positioning holes 21 are circular through holes with a diameter of 6mm. They are located on both sides of the mounting hole 29, 8mm away from the edge of the mounting hole 29. Along the extension direction perpendicular to the annular sleeve surface 27, the positioning holes 21 are located outside the annular sleeve surface 27.

[0065] The protruding part 12 is provided with two fixing holes 121 on both sides of the data connector 13. The fixing holes 121 are M5 threaded holes with a depth of 12mm. The dustproof part 2 is provided with two mating holes 22 on both sides of the mounting hole 29. The mating holes 22 are through holes with a diameter of 5.2mm. The two mating holes 22 are connected to the two fixing holes 121 and are located inside the inner annular groove 28. The eddy current sensor also includes two M5 stainless steel bolts as fasteners. The bolts pass through the mating holes 22 and extend into the corresponding fixing holes 121 to fix the dustproof part 2 and the sensor body 1.

[0066] A metal ring 23 is provided outside each of the two mating holes 22 of the dustproof component 2. The metal ring 23 is made of steel, with an outer diameter of 10 mm, an inner diameter of 5.2 mm, and a thickness of 3 mm, and is embedded in the dustproof component 2. The gap between the mounting hole 29 and the data connector 13 is 0.8 mm. The gap between the dustproof component 2 and the arc-shaped body 11 is 3 mm.

[0067] In the description of this specification, specific features, structures, materials, or characteristics may be combined in any suitable manner in one or more embodiments or examples.

[0068] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any changes or substitutions within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. An eddy current sensor, characterized in that, include: The sensor body has an arc-shaped main body, a protruding part, and a data connector arranged in sequence, wherein the arc-shaped main body, the protruding part, and the data connector are fixedly connected. A dustproof component has an internal abutment plane and an annular sleeve surface. The dustproof component has a mounting hole that passes through the abutment plane. The abutment plane of the dustproof component abuts against the end face of the protruding part away from the arc-shaped body. The annular sleeve surface is sleeved on the annular surface of the protruding part. The data connector is located inside the mounting hole. An outer sealing ring is provided on the outer annular surface of the annular sleeve surface of the dustproof component, and the sealing ring is disposed in the outer annular groove. An inner sealing ring is provided on the abutting surface and outside the mounting hole, with an inner annular groove. The inner sealing ring is disposed in the inner annular groove and abuts against the protruding portion of the sensor body.

2. The eddy current sensor according to claim 1, characterized in that, Two outer sealing rings and two outer annular grooves are provided. The two outer annular grooves are distributed at intervals along the extension direction of the annular sleeve surface, and the two outer sealing rings are respectively disposed in the two outer annular grooves.

3. The eddy current sensor according to claim 1, characterized in that, Multiple ribs are provided on the outer surface of the dustproof component, and the ribs are provided in the through part of the outer annular groove.

4. The eddy current sensor according to claim 1, characterized in that, The dustproof component is also provided with two positioning holes, which are located on both sides of the mounting hole and are located outside the annular sleeve surface along the extension direction perpendicular to the annular sleeve surface.

5. The eddy current sensor according to claim 1, characterized in that, The protruding portion has two fixing holes on both sides of the data connector, and the dustproof component has two mating holes on both sides of the mounting hole. The two mating holes communicate with the two fixing holes and are located inside the inner annular groove. The eddy current sensor also includes two fixing members, which pass through the mating hole and extend into the corresponding fixing hole to fix the dustproof component and the sensor body.

6. The eddy current sensor according to claim 5, characterized in that, The fastener is a threaded component, and the fixing hole is a threaded hole.

7. The eddy current sensor according to claim 5, characterized in that, The dustproof component also includes two metal rings, which are respectively disposed outside the two mating holes and embedded inside the dustproof component.

8. The eddy current sensor according to claim 1, characterized in that, The mounting hole is clearance-fitted with the data connector.

9. The eddy current sensor according to claim 1, characterized in that, A gap is provided between the dustproof component and the arc-shaped main body.

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