Sensor of connecting rod structure

Abstract

The utility model discloses a sensor of a connecting rod structure, and relates to the technical field of force measurement, in particular to elastic deformation of a measuring gauge. A sensor of a connecting rod structure is characterized by comprising a sensor assembly and an elastomer connecting rod, the sensor assembly is installed in the middle of the connecting rod, the connecting rod is in a long strip shape, one end of the connecting rod is connected with an upper installation base, and the other end of the connecting rod is connected with a lower installation base. The utility model provides a sensor with a connecting rod structure, which solves the problems of difficulty in maintenance, high cost, small measuring range and short service life, and achieves the purposes of convenience in maintenance, low cost, large measuring range, good sealing effect, high precision and long service life.

Description

Technical Field

[0001] This utility model relates to the field of force measurement technology, and in particular to measuring the elastic deformation of a gauge. Background Technology

[0002] A sensor is a high-precision force-to-electricity conversion device. Force sensors are widely used in scientific research and industrial production to measure the force or weight of workpieces. In the machining, assembly, and on-site installation of large steam turbine cylinders, multi-point force measurement of the cylinder is required for reasonable load distribution. Previously, mechanical spring force gauges were used, but due to the large deformation of the springs and reliance on human observation and marking, the measurement accuracy was low and easily affected by human factors. Using existing resistance strain gauge sensors requires hoisting the workpiece and installing the sensor below the measurement point, ensuring the sensor and workpiece are relatively fixed for accurate measurement, which is extremely difficult to achieve with large workpieces. In actual measurement, the narrow working space makes sensor adjustment difficult, and installation and operation are extremely inconvenient. For example, Chinese Patent CN2665690Y discloses a force sensor and provides the following technical solution. This utility model discloses a force sensor, specifically a sensor that can sensitively sense force, is easy to use, and is suitable for force measurement of large workpieces. This utility model includes a force-bearing seat with a built-in bridge, sensing element, and elastic body. The force-bearing seat is connected to a hollow threaded rod with a hexagonal head and threads, and a force-transmitting rod inside the threaded rod. Due to the special structure of the threaded rod, this utility model can conveniently fix the sensor and lift the workpiece simultaneously, thus enabling the accurate measurement of single-point or multi-point forces on a steam turbine cylinder.

[0003] However, the force sensor with the above structure has a small measuring range, only a few hundred kilograms, which is not suitable for applications requiring a large measuring range. Furthermore, it lacks protective measures. According to conventional sensor design experience and concepts, the sensor only needs to meet sufficient force measurement accuracy and reasonable sealing measures. However, the actual working environment is ignored, which can easily lead to a shortened lifespan of the sensor, preventing it from reaching the designed lifespan. Utility Model Content

[0004] To address the problems of difficult maintenance, high cost, small measuring range, and short service life mentioned in the background art, this utility model proposes a sensor with a linkage structure, which achieves the goals of convenient maintenance, low cost, large measuring range, good sealing effect, high accuracy, and long service life.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a sensor with a linkage structure, comprising a sensor assembly and an elastic linkage, wherein the sensor assembly is installed in the middle of the linkage, the linkage is elongated, one end of which is connected to an upper mounting base and the other end of which is connected to a lower mounting base.

[0006] The advantage of this design is that the connecting rod structure makes the sensor have high stability and reliability. The sensor component is installed in the middle of the connecting rod, which can reduce the influence of external interference on the sensor measurement and provide more accurate measurement results. At the same time, the long-strip design of the connecting rod can enable the sensor to have a large measurement range and high sensitivity. The structure connecting the upper mounting seat and the lower mounting seat can facilitate the installation and connection of the sensor and ensure the firmness of the connection.

[0007] Preferably, the middle of the connecting rod is slender with protrusions at both ends. The middle part of the upper mounting seat and the lower mounting seat has a "convex" - shaped structure, and side plates are provided on both sides. The connecting rod is connected to the upper mounting seat and the lower mounting seat through mounting seat bolts.

[0008] The advantage of this design is that the slender connecting rod can provide a larger measurement range and higher sensitivity. The "convex" - shaped structure and the design of the side plates in the middle part of the upper mounting seat and the lower mounting seat can increase the connection area with the device, provide a more stable connection and a more uniform force distribution, and further improve the stability and reliability of the sensor.

[0009] Preferably, the middle of the connecting rod has patch holes and module holes. The sensor component is installed on the patch holes and module holes. The patch holes and module holes are welded and sealed through diaphragms, and glue filling treatment is carried out inside. A protection plate is installed outside the patch holes and module holes. The protection plate is fixedly installed by protection plate bolts, and the protection plate bolts are located on the side far from the patch holes.

[0010] The advantage of this design is that the welding and sealing and glue filling treatment of the patch holes and module holes can provide good sealing performance, protecting the sensor component from external environmental interference such as dust and moisture. The installation of the protection plate can further protect the patch holes and module holes from external collision or damage. At the same time, the fixed installation of the protection plate can increase the structural stability and durability of the sensor.

[0011] Preferably, the connecting part between the upper mounting seat and the connecting rod is connected by welding, and the connecting part between the lower mounting seat and the connecting rod is connected by welding.

[0012] The advantage of this design is that the welded connection can provide a more firm connection, increasing the stability and reliability of the sensor. The welded connection between the upper mounting seat and the connecting rod and the welded connection between the lower mounting seat and the connecting rod can ensure that the sensor will not loosen or fall off during operation, guaranteeing the accuracy and stability of the measurement.

[0013] Preferably, the side of the upper mounting seat has a wire outlet hole, and the bottom has a mounting hole. The wire enters the inside of the connecting rod through the wire outlet hole and is bent to be connected to the sensor component at the module hole. The mounting hole is sealed by multiple diaphragm layers of different sizes and multiple glue layers.

[0014] The advantage of this design is that the placement of the lead-out and mounting holes facilitates the lead-out and connection of sensor wires, making sensor installation more convenient and quick. The sealing of the multi-layer diaphragm and adhesive layers provides excellent waterproof performance, protecting the wires and sensor components from humid environments and improving the reliability and durability of the sensor.

[0015] Preferably, the lower mounting base has a wire outlet hole on the side and a mounting hole on the bottom. The wire enters the connecting rod through the wire outlet hole, is bent, and then connects to the sensor assembly at the module hole. The mounting hole is sealed with multiple layers of diaphragms of different sizes and multiple layers of adhesive.

[0016] Preferably, the diaphragm layer includes a first diaphragm, a second diaphragm, and a third diaphragm, and the adhesive layer includes an epoxy adhesive layer, a silicone rubber adhesive layer, and a polyurethane potting compound adhesive layer. The third diaphragm is larger than the second and first diaphragms and its top is covered by the epoxy adhesive layer. The second diaphragm is larger than the first diaphragm and is installed at the bottom of the third diaphragm. The bottom of the second diaphragm is sealed with a silicone rubber adhesive layer. The first diaphragm is located at the bottom of the silicone rubber adhesive layer. The bottom of the first diaphragm is filled with a polyurethane potting compound adhesive layer, and the wire is bent within the polyurethane potting compound adhesive layer.

[0017] The advantages of this design are that the combination of multiple diaphragm layers and adhesive layers provides better sealing and protection, ensuring stable operation and a long lifespan for the sensor assembly. Different sized diaphragm layers can accommodate various size and shape requirements, offering better adaptability. Bending the wires within the polyurethane potting compound reduces the degree of wire bending, minimizing stress and damage to the sensor assembly, and improving the sensor's reliability and durability.

[0018] Preferably, the welding part of the diaphragm is provided with a countersunk platform, the depth of which is 0.05mm-0.15mm, and the diameter of the countersunk platform is 4mm-6mm larger than the diameter of the diaphragm.

[0019] The advantage of this design is that the countersunk platform in the welding section provides better welding results and reliability. The countersunk platform ensures that the welding joint is flush with the diaphragm surface, reducing the height difference after welding and effectively dissipating the heat generated during welding. This improves the flatness and appearance quality of the sensor, meeting welding requirements and the sensor's design goals.

[0020] Preferably, the diameter of the mounting hole is larger than that of the cable outlet hole.

[0021] The advantage of this design is that the large diameter of the mounting hole can accommodate more wires, facilitating sensor installation and connection. Since the sensor's end face needs to connect to the device, the sensor's wires cannot be led out directly from the end face; they need to exit from the side of the mounting base near the device. This is to avoid excessively long exposed wires due to direct wire exit from the middle, increasing the likelihood of wire damage, and to shorten the external wire length by installing the plug near the device, eliminating the need to consider fixing this part. Furthermore, the two through holes from the patch area to the plug need to be perpendicular at 90°. Therefore, a larger mounting hole is reserved at the mounting base.

[0022] Preferably, for sensors with the above-mentioned linkage structure, the protection plate is made of steel plate.

[0023] Compared with the prior art, the beneficial effects of this utility model are as follows.

[0024] 1. Enhanced Stability and Reliability: The sensor assembly is mounted in the middle of the connecting rod, reducing the impact of external interference on sensor measurements and providing more accurate results. Simultaneously, the elongated design of the connecting rod allows the sensor to have a larger measurement range and higher sensitivity. The structure connecting the upper and lower mounting bases facilitates sensor installation and connection, ensuring a stable connection. These design features all contribute to improving the stability and reliability of the sensor.

[0025] 2. Stable and durable structure: The connecting rod is elongated in the middle and connects to the upper and lower mounting bases via mounting bolts. This design provides a wider measurement range and higher sensitivity. The "U"-shaped structure in the middle section of the upper and lower mounting bases and the design of the side plates increase the connection area with the equipment, providing a more robust connection and a more uniform force distribution, further improving the stability and reliability of the sensor.

[0026] 3. Enhanced Sealing and Protection: The connecting rod features a patch hole and a module hole in the middle, where the sensor assembly is installed. It is sealed by welding with a diaphragm and then potted with adhesive. A protective plate is installed on the outside of the patch hole and module hole, secured with protective plate bolts located away from the patch hole. This design provides excellent sealing performance, protecting the sensor assembly from external environmental interference such as dust and moisture. Simultaneously, the protective plate further protects the patch hole and module hole from external impacts or damage. These design features contribute to improving the sensor's protection and durability. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the structure of one embodiment of the present invention.

[0028] Figure 2This is a schematic diagram of a connecting rod structure according to an embodiment of the present invention.

[0029] Figure 3 This is a schematic diagram of the connection between the mounting base and the connecting rod in one embodiment of the present invention.

[0030] Figure 4 This is a schematic diagram of the connection between the mounting base and the connecting rod in one embodiment of the present invention.

[0031] Figure 5 This is a schematic diagram of the connection between the protection plate and the connecting rod in one embodiment of the present invention.

[0032] Figure 6 This is a schematic diagram of the end face of the mounting base according to one embodiment of the present invention.

[0033] Figure 7 This is a cross-sectional view of the mounting base end face according to an embodiment of the present invention.

[0034] Figure 8 This is a Wheatstone bridge circuit diagram after compensation for the sensor section in one embodiment of the present invention.

[0035] Figure 9 This is a wiring diagram of a sensor bridge according to one embodiment of the present invention.

[0036] Diagram description: Upper mounting base 1, connecting rod 2, protection plate 3, lower mounting base 4, patch hole 5, module hole 6, countersunk plate 7, mounting hole 8, epoxy adhesive layer 8.1, silicone rubber adhesive layer 8.2, polyurethane potting compound adhesive layer 8.3, wire 8.4, third diaphragm 8.5, second diaphragm 8.6, first diaphragm 8.7, wire outlet 9, excitation (+) red 10.1, signal (+) green 10.2, excitation (-) black 10.3, signal (-) white 10.4. Detailed Implementation

[0037] To make the objectives, technical solutions, and advantages of this disclosure clearer, the embodiments of this disclosure will be further described in detail below with reference to the accompanying drawings. The proportions of the components are not drawn to scale, and the proportions and dimensions shown in the drawings should not limit the essential technical solutions of this utility model. These embodiments do not exhaustively describe all details, nor do they limit this utility model to merely the specific embodiments described.

[0038] See Figure 1-9 As shown, a sensor with a linkage structure is characterized by comprising: a sensor assembly and an elastic linkage, wherein the sensor assembly is installed in the middle of the linkage, and the linkage is elongated, with one end connected to an upper mounting base and the other end connected to a lower mounting base.

[0039] This invention is well-suited for use in balers. The baler push rod is the connecting rod of the piston inside the baler and is one of the key components for transmitting power during the reciprocating motion of the piston. It can directly measure the power during operation. The main defects and shortcomings of the existing technology are:

[0040] 1. Small measuring range. Currently, the measuring range of linkage force sensors on the market is small, generally only a few hundred kilograms;

[0041] 2. Lack of protective measures. According to conventional sensor design experience and concepts, sensors only need to meet sufficient force measurement accuracy and reasonable sealing measures. However, the actual working environment is ignored, which can easily lead to a shortened lifespan of the sensor, preventing it from reaching its designed lifespan.

[0042] 3. Difficult to maintain. The domestic market share of this type of large-range force sensor is low, and most of it relies on imports. Once such products are damaged, they need to be returned to the factory for repair, which not only incurs expensive repair costs but also causes a long delay in work time, affecting production efficiency.

[0043] The technical problem this invention aims to solve is to provide a simple, universal, and mature technology for implementing a force sensor in the push rod structure of a baler, while also addressing some existing shortcomings. To solve the above technical problem, the technical solution provided by this invention is: to design a sensor with a linkage structure based on the principle of resistance strain gauge. The high yield strength of steel allows for a larger force measurement range. Furthermore, it provides waterproof, dustproof, impact-resistant, and crush-resistant protection for critical locations of electronic components, improving stability and extending service life.

[0044] like Figure 1 In one embodiment shown, a sensor with a linkage structure includes a sensor assembly and an elastic linkage. The sensor assembly is mounted in the middle of the linkage, which is elongated and connected at one end to an upper mounting base and at the other end to a lower mounting base. The linkage is slender in the middle and protrudes at both ends. The upper and lower mounting bases have a U-shaped structure in the middle section and side plates on both sides, which are connected to the upper and lower mounting bases by mounting base bolts. The upper mounting base and the linkage are welded together, and the lower mounting base and the linkage are also welded together. The protective plate is made of steel plate.

[0045] This utility model has an overall elongated shape with wide mounting bases at both ends and a slender elastic connecting rod in the middle. If it were to be integrally formed, a large amount of waste material would need to be removed, resulting in long processing time and significant difficulties. Therefore, it is designed as a split type, consisting of an elastic connecting rod, an upper elastic mounting base, a lower elastic mounting base, a protective plate, and other accessories such as plugs and screws. The middle part of the upper and lower mounting bases has a convex structure with side plates on both sides. This is to provide sufficient space to connect the mounting bases at both ends to the middle elastic connecting rod, and also to increase the contact area at the connection point between the elastic connecting rod and the equipment, making the force more even and the connection more stable. The middle elastic connecting rod has a large span and is slender overall, making it prone to bending and deformation after heat treatment. Therefore, a larger machining allowance is used, and after machining, multiple precision grinding processes are performed to meet dimensional and surface roughness requirements. Simultaneously, the overall size of the connecting rod is large; reducing the size of the middle part effectively reduces the overall weight.

[0046] The design advantages of the linkage structure sensor of this utility model are mainly reflected in the following aspects:

[0047] First, mounting the sensor assembly in the central area of ​​the elastomer connecting rod optimizes the sensor's position and helps improve its measurement accuracy and stability. The elongated connecting rod design makes the component layout more compact, enhancing the overall structural strength. Second, the split design significantly reduces waste during processing, thereby lowering production costs. Simultaneously, this design simplifies processing steps, reduces processing difficulty, and improves production efficiency. Furthermore, the innovative "convex" shaped structure not only provides ample space for the connection points, ensuring a stable connection between the upper and lower mounting bases and the elastomer connecting rod, but also increases the contact area, resulting in more even stress distribution and improving the overall structural stability and durability. Additionally, the slender design of the connecting rod, combined with heat treatment, while prone to bending deformation, ensures that the final product meets stringent dimensional and surface roughness requirements by increasing processing allowances and performing multiple precision grinding processes, despite the inherent susceptibility to bending deformation. Finally, the optimization of overall dimensions, particularly the thinning of the central section, effectively reduces the overall weight, facilitating installation and handling, and also improving dynamic response speed and reducing energy consumption.

[0048] like Figure 2 , Figure 3 and Figure 4In an embodiment shown, the utility model designs a special connecting rod structure sensor, which ingeniously integrates the sensor component and the elastic body connecting rod. The core part of this sensor, that is, the sensor component, is cleverly placed in the middle of the connecting rod. The connecting rod itself is designed to be long and strip-shaped, facilitating layout and installation. One end of it is firmly connected to the upper mounting seat 1 by welding, and the other end is also combined with the lower mounting seat 4 by welding. The middle part of the connecting rod is slender, and obvious protrusions are designed at both ends. Such a shape not only increases the aesthetics but also considers the functionality in actual use. The middle section of the upper mounting seat 1 and the lower mounting seat 4 is designed with a "convex" shape structure, and supporting side plates are added on both sides to enhance the stability of the entire structure. By setting bolts in these parts, the connecting rod can be firmly connected to the upper and lower mounting seats. In the middle section of the connecting rod, patch holes 5 and module holes 6 are carefully designed, and these two hole positions are the key positions for installing the sensor component. To ensure the sealing and functionality, the sensor component at these hole positions is welded and sealed with a diaphragm, and glue is filled inside, aiming to improve the protection level of the sensor and ensure its stable operation in various environments.

[0049] The main body part of the utility model mainly consists of an elastic body connecting rod and upper and lower mounting seats. The upper and lower mounting seats and the elastic body connecting rod are first connected with bolts, and thread glue is pre-applied during connection to prevent loosening. Then, welding is carried out along the edge of the connection part of the upper and lower mounting seats and the elastic body connecting rod. The side plates of the upper and lower mounting seats make the welded connection part more, and the welding strength is more reliable than before. After overall welding, not only does it achieve double connection protection, enhancing the reliability of the connection method, but it also solves the sealing hidden danger problem existing in the edge part.

[0050] As Figure 5 In an embodiment shown, a protection plate 3 is installed outside the patch hole 5 and the module hole 6. The protection plate 3 is fixedly installed by protection plate bolts, and the protection plate bolts are located on the side far from the patch hole 5. A counterbore 7 is provided at the welded part of the diaphragm. Conventional sensors protect the patch hole and the module hole by filling glue and welding the diaphragm. As long as the sealing performance of the sensor is sufficient and it does not affect the normal force measurement use of the sensor, it is fine. To enhance the protection, first, on the basis of the conventional method, a counterbore with a depth of 1 mm is made at the welded part of the diaphragm. The diameter of the counterbore is about 5 mm larger than the diameter of the diaphragm, which can effectively dissipate the heat generated during welding. Secondly, a steel plate is covered at two important parts for storing electronic devices, namely the patch hole and the module hole of the sensor, to effectively prevent external force bumps and impacts. At the same time, in order to avoid the stress interference caused by the bolt connection to the sensor body part and resulting in obvious differences in sensor performance, the four bolt holes are designed on the same side far from the patch area.

[0051] As Figure 6 In one embodiment shown, the design of this utility model specifically considers electrical connections and protective measures, with the following two embodiments: In one embodiment, the upper mounting base 1 has a wire outlet hole 9 on its side and a mounting hole 8 on its bottom surface. The wire is introduced into the connecting rod through the wire outlet hole 9, bent internally, and finally connected to the sensor assembly located on the module hole. To ensure the sealing and protection of the connection point, the mounting hole 8 is sealed using multiple layers of diaphragms of different sizes and multiple layers of adhesive. This design not only ensures the stability of the wire connection but also enhances the sensor's waterproof and dustproof capabilities. It is worth mentioning that the diameter of the mounting hole 8 is larger than that of the wire outlet hole 9; this ingenious design ensures smooth wire passage and efficient sealing of the mounting hole.

[0052] In another embodiment, the design concept is similar to that described above, but applied to the lower mounting base 4. Similarly, a wire outlet hole 9 is provided on the side, and a mounting hole 8 is provided on the bottom surface. The wire is introduced through the wire outlet hole 9 on the side, bent internally, and finally connected to the sensor assembly at the module hole. The mounting hole 8 is also sealed using multiple layers of diaphragms and adhesive layers to ensure connection stability and overall sensor protection. In this design, the diameter of the mounting hole 8 is also larger than that of the wire outlet hole 9 to meet the same design requirements.

[0053] Through these two embodiments, the design of this linkage structure sensor demonstrates a high degree of emphasis on the safety and protection of electrical connections, ensuring the reliability and long-term stability of the sensor under various environmental conditions.

[0054] Because the sensor's end face needs to connect to the device, the sensor's wires cannot be led out directly from the end face. Instead, they need to exit from the side of the mounting bracket near the device. This avoids excessively long exposed wires due to direct wire exit from the middle, increasing the likelihood of damage. Secondly, installing the plug near the device shortens the external wire length, eliminating the need to consider fixing this part. Furthermore, the two through holes from the patch area to the plug are perpendicular at 90°. Therefore, a large mounting hole and two steps are provided at the mounting bracket. This larger hole facilitates operation, allowing the wires from the socket to be bent and led to the module hole on the circuit board. Since the sensor's overall length is too long for welding sealing, and considering that the area with close contact with the device is not the most affected by sealing, adhesive sealing is used. Three diaphragms of different sizes and three types of adhesive are used for layered sealing. Figure 7 As shown.

[0055] like Figure 7In one embodiment shown, the diaphragm layer includes a first diaphragm, a second diaphragm, and a third diaphragm. The adhesive layer includes an epoxy adhesive layer, a silicone rubber adhesive layer, and a polyurethane potting compound adhesive layer. The third diaphragm is larger than the second and first diaphragms and its top is covered by the epoxy adhesive layer. The second diaphragm is larger than the first diaphragm and is installed at the bottom of the third diaphragm. The bottom of the second diaphragm is sealed by the silicone rubber adhesive layer. The first diaphragm is located at the bottom of the silicone rubber adhesive layer. The bottom of the first diaphragm is filled with the polyurethane potting compound adhesive layer. The wire is bent within the filled polyurethane potting compound adhesive layer.

[0056] like Figure 8 and Figure 9 In one embodiment shown, the sensor employs the principle of resistance strain gauge. The elastic body of the sensor body undergoes minute deformation under stress. Since the resistance value is related to the length and cross-sectional area of ​​the resistor, strain gauges are attached to the most sensitive and easily deformable parts of the elastic body. Four strain gauges form the four arms of a Wheatstone bridge. Therefore, minute deformation affects the resistance value of each arm of the strain gauge, i.e., the Wheatstone bridge, resulting in a small potential difference in the originally balanced bridge. Measurements are then taken of each arm, and the measured electrical signal is converted into the desired load magnitude. However, conventional Wheatstone bridges cannot meet practical application requirements. Not only are there discrepancies in test data during manufacturing, but they are also affected by external environmental factors such as temperature and humidity in the actual working environment. Therefore, to ensure consistent sensor production and meet practical needs, various compensations need to be applied to the original Wheatstone circuit to enhance its anti-interference capability. R1, R2, R3, and R4 are the strain gauges on the original Wheatstone bridge; Rz is the zero-point compensation resistor, ensuring the zero point meets usage requirements; Rt is the zero-point temperature compensation, allowing the zero point to vary within a very small range at various temperatures; RM is the sensitivity temperature compensation, ensuring the sensor meets performance requirements at various temperatures; RL is the linear compensation, further improving sensor performance; Rs is the sensitivity compensation, keeping the sensitivity within a preset range; and Rj is the input resistance compensation, improving sensor consistency. These compensations significantly enhance the sensor's reliability and practicality. Based on the compensated Wheatstone bridge, design the actual bridge wiring diagram for the sensor, where the connecting wires are red, black, and green from top to bottom.

[0057] This utility model is not limited to the above-described embodiments. Any changes made to its shape or material composition, as long as the structural design provided by this utility model is adopted, are considered a variation of this utility model and should be regarded as within the protection scope of this utility model.

Claims

1. A sensor with a linkage structure, characterized in that, Comprising: A sensor component and an elastomeric link (2), the sensor component being installed in the middle of the link (2), the link (2) being elongated, one end connected to the upper mounting seat (1), the other end connected to the lower mounting seat (4), a patch hole (5) and a module hole (6) being provided in the middle of the link, the sensor component being installed on the patch hole (5) and the module hole (6), and the patch hole (5) and the module hole (6) being sealed by a diaphragm.

2. The sensor with a linkage structure according to claim 1, characterized in that, The middle of the link is slender with protrusions at both ends, a "convex" - shaped structure is provided in the middle part of the upper mounting seat (1) and the lower mounting seat (4), side plates are provided on both sides, and the link is connected to the upper mounting seat (1) and the lower mounting seat (4) by mounting seat bolts.

3. A sensor with a linkage structure according to claim 1 or 2, characterized in that, A patch hole (5) and a module hole (6) are provided in the middle of the link, the sensor component is installed on the patch hole (5) and the module hole (6), the patch hole (5) and the module hole (6) are welded and sealed by a diaphragm, and internal glue filling treatment is carried out. A protection plate (3) is installed outside the patch hole (5) and the module hole (6), the protection plate (3) is fixedly installed by protection plate bolts, and the protection plate bolts are located on the side away from the patch hole (5).

4. A sensor with a linkage structure according to claim 1, characterized in that, The connecting part of the upper mounting seat (1) and the link (2) is connected by welding, and the connecting part of the lower mounting seat (4) and the link (2) is connected by welding.

5. A sensor with a linkage structure according to claim 1, characterized in that, An outlet hole (9) is provided on the side surface of the upper mounting seat (1), and a mounting hole (8) is provided on the bottom surface. The wire enters the interior of the link through the outlet hole (9), is bent, and then connected to the sensor component at the module hole. The mounting hole (8) is sealed by multiple diaphragm layers of different sizes and multiple glue layers.

6. A sensor with a linkage structure according to claim 1, characterized in that, An outlet hole (9) is provided on the side surface of the lower mounting seat (4), and a mounting hole (8) is provided on the bottom surface. The wire enters the interior of the link through the outlet hole (9), is bent, and then connected to the sensor component at the module hole. The mounting hole (8) is sealed by multiple diaphragm layers of different sizes and multiple glue layers.

7. A sensor with a linkage structure according to claim 5 or 6, characterized in that, The diaphragm layer includes a first diaphragm, a second diaphragm, and a third diaphragm. The glue layer includes an epoxy glue layer, a silicone rubber glue layer, and a polyurethane potting glue layer. The size of the third diaphragm is larger than that of the second diaphragm and the first diaphragm, and the top is covered by the epoxy glue layer. The size of the second diaphragm is larger than that of the first diaphragm, and it is installed at the bottom of the third diaphragm. The bottom of the second diaphragm is sealed by the silicone rubber glue layer. The first diaphragm is provided at the bottom of the silicone rubber glue layer, and the polyurethane potting glue layer is poured at the bottom of the first diaphragm. The wire is bent in the poured polyurethane potting glue layer.

8. A sensor with a linkage structure according to claim 3, characterized in that, A sunk - table (7) is provided at the welding part of the diaphragm, the depth of the sunk - table (7) is 0.05 mm - 0.15 mm, and the diameter of the sunk - table (7) is 4 mm - 6 mm larger than the diameter of the diaphragm.

9. A sensor with a linkage structure according to claim 5 or 6, characterized in that, The diameter of the mounting hole (8) is larger than that of the outlet hole (9).

10. A sensor with a linkage structure according to claim 3, characterized in that, The protection plate (3) is made of steel plate.

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