A pressure sensor

Abstract

The utility model provides a pressure sensor, including a shielding cover, and also including: an electric connector assembly, one end of which extends into the shielding cover and forms a shielding cavity with the shielding cover, and the shielding cover is riveted to the electric connector assembly after being bent; a pressure sensing assembly, which is arranged in the shielding cavity; a shell, which has a cavity for accommodating the shielding cover, and the shell is riveted to the shielding cover after one end close to the electric connector assembly is bent; and an upper cover, which is sleeved outside the electric connector assembly and is detachably fixedly connected to the electric connector assembly. The utility model can avoid the occurrence of accuracy drift in the pressure sensor.

Description

Technical Field

[0001] The utility model relates to the technical field of sensors, in particular to a pressure sensor. Background Art

[0002] The pressure sensor is a detection device. With the continuous promotion of the market, pressure sensors will be used in various occasions.

[0003] At present, the common packaging structure of pressure sensors is to quickly connect with standard connectors and plug-ins. Its waterproof level is generally IP65. The disadvantage is that the waterproof level is not high. When it needs to be used in harsh environments such as corrosion, dirt, and water vapor, this type of sensor cannot meet the requirements and is prone to internal water ingress and failure.

[0004] In order to improve the waterproof performance of the above-mentioned pressure sensor packaging structure, another pressure sensor packaging structure has emerged in the prior art. After the pins and wires are lead-free soldered, a accommodating cavity is formed at the upper end of the plastic shell. The inside of the accommodating cavity is filled with glue to completely wrap the welding points of the wires and pins and the riveted and bent positions of the outermost metal shell. Since the metal shell of the pressure sensor will generate stress after riveting and bending, a high temperature environment is usually used to release the stress, and it is necessary to ensure that the stress will not reappear in the later period. Therefore, during the later use of the pressure sensor, the riveted position of the shell should be prevented from being stressed again as much as possible. However, when the riveted position of the shell is subjected to force again, since the glue poured inside the accommodating cavity is usually epoxy resin potting glue, during the temperature change process between low temperature -40℃ and high temperature 135℃, the force at the riveted bending position of the metal shell will be transmitted to the internal structure inside the metal shell through the potting glue, which will produce an extrusion effect on the internal structure. At this time, the internal state is inconsistent with that before calibration, which will inevitably cause the pressure sensor to have an accuracy drift. In addition, the connection method between the plastic and the metal shell is more complicated, and usually uses threaded connection or hot riveting connection. Threaded connection is more complicated to assemble, and hot riveting requires investment in equipment, and the equipment cost is high.

[0005] Therefore, it is necessary to develop a pressure sensor to avoid accuracy drift of the pressure sensor. Utility Model Content

[0006] The utility model aims to provide a pressure sensor to solve the problem that the existing pressure sensor is prone to precision drift.

[0007] In order to solve the above technical problems, the utility model provides a pressure sensor, including a shielding cover, and also including: an electrical connector assembly, one end of which extends into the shielding cover and forms a shielding cavity with the shielding cover, and the shielding cover is riveted to the electrical connector assembly after being bent; a pressure sensing assembly, arranged in the shielding cavity; a shell, having a cavity for accommodating the shielding cover, and the shell is riveted to the shielding cover after one end close to the electrical connector assembly is bent; and an upper cover, which is sleeved on the outside of the electrical connector assembly and is detachably fixedly connected to the electrical connector assembly.

[0008] Optionally, it also includes: a first potting glue layer, which is filled in the structural cavity formed by the upper cover and the electrical connector assembly; and a second potting glue layer, which is filled in the gap formed by the shell and the shielding cover; wherein the second potting glue layer is a soft glue.

[0009] Optionally, a mesh gasket is provided between the bending part of the shell and the bending part of the shielding cover.

[0010] Optionally, the upper cover is snap-connected to the electrical connector assembly.

[0011] Optionally, a structural groove is provided on the electrical connector assembly, and a limiting protrusion is protruded on the inner wall of the upper cover, and the limiting protrusion is snap-fitted with the structural groove.

[0012] Optionally, a limiting boss is provided on a surface of the electrical connector assembly opposite to the pressure sensing assembly, and the limiting boss cooperates with the pressure sensing assembly.

[0013] Optionally, the soft glue is RTV silicone.

[0014] Optionally, an insulating coating is provided on the outer side of the shielding cover.

[0015] Optionally, the insulating coating includes a polyparaxylene coating, and the polyparaxylene coating is located on the outer surface of the shielding cover.

[0016] Optionally, the pressure sensor further includes a first inner sealing ring and a retaining ring, wherein the first inner sealing ring is arranged below the pressure sensing element, and the retaining ring is arranged at an outer edge of the first inner sealing ring.

[0017] The utility model provides a pressure sensor with the following beneficial effects:

[0018] Since one end of the electric connector assembly extends into the shielding cover, and the shielding cover is riveted to the electric connector assembly after being bent, and the electric connector assembly and the shielding cover form a shielding cavity, and the shell has a sensing cavity for accommodating the shielding cover, and the shell is bent at one end close to the electric connector assembly and riveted to the shielding cover, the upper cover is sleeved outside the electric connector assembly and is detachably fixedly connected to the electric connector assembly, therefore, the shell and the upper cover are separate structures, therefore, the stress generated by the riveting of the shell and the shielding cover will not be transmitted to the shielding cover and the pressure sensing assembly in the shielding cover, so that when the shell is subjected to external force, the pressure sensing assembly in the shielding cover will not be squeezed, so the internal structure of the pressure sensor is consistent before and after calibration, and the internal structure does not change much during use, and there will be no accuracy drift. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the structure of the pressure sensor in the embodiment of the utility model;

[0020] Figure 2 is a cross-sectional view of a pressure sensor in an embodiment of the utility model;

[0021] Figure 3 It is an exploded schematic diagram of a pressure sensor in an embodiment of the utility model;

[0022] Figure 4 It is a cross-sectional view of the upper cover and the electrical connector assembly of the pressure sensor in the embodiment of the utility model after being assembled;

[0023] Figure 5 It is a structural schematic diagram of the upper cover in the pressure sensor in the embodiment of the utility model;

[0024] Figure 6 is a cross-sectional view of an upper cover in a pressure sensor in an embodiment of the utility model;

[0025] Figure 7 It is a structural schematic diagram of an electrical connector assembly in a pressure sensor in an embodiment of the utility model;

[0026] Figure 8 is a cross-sectional view of an electrical connector assembly in a pressure sensor in an embodiment of the utility model;

[0027] Fig. 9 It is a structural schematic diagram of a reticulated gasket in a pressure sensor in an embodiment of the utility model;

[0028] Fig.10 It is a schematic diagram of the structure of the shielding cover in the pressure sensor in the embodiment of the utility model before being packaged.

[0029] Description of reference numerals:

[0030] 100-shielding cover; 110-structural opening

[0031] 200-electrical connector assembly; 210-structural groove; 220-convex point; 230-limiting boss; 240-pin; 250-electrical connector; 260-wiring harness;

[0032] 310-pressure sensing element; 320-FPC conditioning circuit;

[0033] 400-housing;

[0034] 500-upper cover; 510-limiting protrusion;

[0035] 610-first potting glue layer;

[0036] 620-second potting glue layer;

[0037] 700-Reticulated washer;

[0038] 810-first inner sealing ring;

[0039] 820- retaining ring;

[0040] 830-Second inner sealing ring. DETAILED DESCRIPTION

[0041] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0042] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0043] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0044] In the description of the present utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings, or the orientation or position relationship in which the utility model product is usually placed when in use, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0045] In addition, the terms "horizontal", "vertical" and the like do not mean that the components are required to be absolutely horizontal or suspended, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0046] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0047] refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Fig. 9 and Fig.10 , Figure 1 is a schematic diagram of the structure of the pressure sensor in the embodiment of the utility model, Figure 2 is a cross-sectional view of a pressure sensor in an embodiment of the utility model, Figure 3 is an exploded schematic diagram of a pressure sensor in an embodiment of the utility model, Figure 4 It is a cross-sectional view of the upper cover 500 and the electrical connector assembly 200 in the pressure sensor in the embodiment of the utility model after being assembled. Figure 5 : is a schematic diagram of the structure of the upper cover 500 in the pressure sensor in the embodiment of the utility model, Figure 6 is a cross-sectional view of the upper cover 500 in the pressure sensor in the embodiment of the utility model, Figure 72 is a schematic diagram of the structure of the electric connector assembly 200 in the pressure sensor in the embodiment of the utility model. Figure 8 is a cross-sectional view of an electrical connector assembly 200 in a pressure sensor according to an embodiment of the present utility model. Fig. 9 : is a schematic diagram of the structure of the reticulated gasket 700 in the pressure sensor in the embodiment of the utility model, Fig.10 1 is a schematic diagram of the structure of the shielding cover 100 in the pressure sensor in the embodiment of the utility model before being packaged. The embodiment provides a pressure sensor, including:

[0048] Shielding cover 100;

[0049] The electrical connector assembly 200 has one end extending into the shielding cover 100 and forming a shielding cavity with the shielding cover 100, and the shielding cover 100 is bent and riveted to the electrical connector assembly 200;

[0050] A pressure sensing component is disposed in the shielding cavity;

[0051] The housing 400 has a cavity for accommodating the shielding cover 100, and one end of the housing 400 close to the electrical connector assembly 200 is bent and then riveted to the shielding cover 100; and,

[0052] The upper cover 500 is sleeved outside the electrical connector assembly 200 and is detachably fixedly connected to the electrical connector assembly 200 .

[0053] Since one end of the electric connector assembly 200 extends into the shielding cover 100, and the shielding cover 100 is riveted to the electric connector assembly 200 after being bent, and the electric connector assembly 200 and the shielding cover 100 form a shielding cavity, and the shell 400 has a cavity for accommodating the shielding cover 100, and the shell 400 is riveted to the shielding cover 100 after being bent, the upper cover 500 is sleeved outside the electric connector assembly 200 and is detachably fixedly connected to the electric connector assembly 200, therefore, the shell 400 and the upper cover 500 are separate structures, therefore, the stress generated by the riveting of the shell 400 and the shielding cover 100 will not be transmitted to the shielding cover 100 and the pressure sensing assembly 300 in the shielding cover 100, so that when the shell 400 is subjected to external force, the pressure sensing assembly 300 in the shielding cover 100 will not be squeezed, so the internal structure of the pressure sensor is consistent before and after calibration, and the internal structure does not change much during use, and there will be no accuracy drift.

[0054] The pressure sensor also includes: a first potting glue layer 610, which is filled in the structural cavity formed by the upper cover 500 and the electrical connector assembly 200; and a second potting glue layer 620, which is filled in the gap formed by the shell 400, the shielding cover 100 and the electrical connector assembly 200; wherein the second potting glue layer 620 is a soft glue. Since the first potting glue layer 610 is filled in the structural cavity formed by the upper cover 500 and the electrical connector assembly 200, and the second potting glue layer 620 is filled in the gap formed by the shell 400 and the shielding cover 100, and the second potting glue layer 620 is soft glue, the stress generated by the riveting of the shell 400 and the shielding cover 100 will not be transmitted to the shielding cover 100 and the pressure sensing component 300 in the shielding cover 100 through the second potting glue layer 620. In this way, when the shell 400 is subjected to external force, the pressure sensing component 300 in the shielding cover 100 will not be squeezed. Therefore, the internal structure of the pressure sensor is consistent before and after calibration, and the internal structure does not change much during use, and there will be no accuracy drift.

[0055] Preferably, the second potting glue layer 620 is filled in the gap formed by the housing 400 , the shielding cover 100 and the electrical connector assembly 200 .

[0056] Preferably, the soft glue is RTV silicone. Since RTV silicone is relatively soft, when the temperature changes from -40°C to 135°C, the extrusion stress generated by the silicone on the riveted bending position of the shell 400 is extremely small and can be ignored, so this structure is more stable.

[0057] Preferably, the upper cover 500 is snap-fitted with the electrical connector assembly 200. Thus, the upper cover 500 and the electrical connector assembly 200 can be assembled quickly and effectively.

[0058] Specifically, refer to Figure 4 , Figure 6 and Figure 8 The electrical connector assembly 200 is provided with a structural groove 210, and the inner wall of the upper cover 500 is provided with a limiting protrusion 510, and the limiting protrusion 510 is engaged with the structural groove 210. After installation, the tight fit can effectively prevent glue overflow during the later glue filling.

[0059] The upper cover 500 and the electrical connector assembly 200 are made of plastic, which may be PA6, PBT, PPE+PA+GF30%, etc. The upper cover 500 is preferably made of PA6. The electrical connector assembly 200 is preferably made of PPE+PA+GF30%.

[0060] The side of the electrical connector assembly 200 is provided with three annularly distributed protrusions 220 to prevent the electrical connector assembly 200 from loosening after being placed in the inner cavity of the shielding cover 100 .

[0061] A limiting boss 230 is disposed on the side of the electrical connector assembly 200 opposite to the pressure sensing assembly. The limiting boss 230 cooperates with the pressure sensing assembly to prevent the pressure sensing assembly from rotating, thus playing a limiting role.

[0062] The electrical connector assembly 200 includes a plug pin 240 , an electrical connector 250 and a wiring harness 260 . The plug pin 240 and the electrical connector 250 are sealed to form a whole, and the other end of the plug pin 240 is welded to the wiring harness 260 .

[0063] The material of the plug pin 240 is phosphor copper, and the surface is lead-free tin-plated to prevent the plug pin 240 from oxidizing and rusting and losing its conductive effect during salt spray and steam aging tests.

[0064] The pressure sensing component includes a pressure sensing element 310 and an FPC conditioning circuit 320. The pressure sensing element 310 and the FPC conditioning circuit 320 are arranged in the shielding cover 100. One end of the FPC conditioning circuit 320 is connected to the PIN pin of the pressure sensing element 310, and the other end is connected to the pin 240 of the electrical connector assembly 200.

[0065] A pressure sensing membrane is provided on the side of the pressure sensing element 310 opposite to the shielding cover 100 to sense the pressure of a medium such as a refrigerant, causing a slight deformation of the distance between the two internal electrodes, thereby changing the size of its internal variable capacitance, while its internal reference capacitance remains unchanged. By utilizing the characteristics of these two capacitors, the ratio of the two is measured, and after a series of signal conditioning, i.e., conditioning circuit processing, a proportional voltage signal output that changes with pressure is generated.

[0066] The substrate of the FPC conditioning circuit 320 is made of PI polyimide, an organic polymer material with the best comprehensive performance. The substrate of the FPC conditioning circuit 320 is resistant to high temperatures of more than 400°C, with a long-term use temperature range of -200°C to ℃, and has high insulation performance. This PI polyimide has excellent bending resistance, and the bending strength of polyimide reinforced with graphite and glass fiber can reach 345MPa. The three copper-clad round holes at one end of the PI polyimide are connected to the three pins 240 of the ceramic capacitor, and the other end is connected to the tin-plated pins 240 in the electrical connector assembly 200. The three pins 240 of the ceramic capacitor are respectively the power supply voltage input line, the signal line and the ground line. When the medium pressure changes, the distance between the sensing film plates acting on the pressure sensing element 310 changes slightly, causing the variable capacitance to change. Through the amplification processing of the conditioning chip of the FPC conditioning circuit 320, a proportional voltage signal output that changes with the pressure can be generated. The external grounding wire, the two flexible thin flat pins in the FPC conditioning circuit 320, and the inner wall of the shielding cover 100 form a conducting loop, so that the electromagnetic field generated by the chip capacitor, chip resistor, conditioning chip, etc. in the FPC conditioning circuit 320 ends at the inner wall of the cylindrical inner shielding cover 100. Then the grounding wire introduces the charges generated by the internal electric field or magnetic field into the ground, which plays a role in preventing electromagnetic interference.

[0067] Preferably, a textured gasket 700 is provided between the bending part of the housing 400 and the bending part of the shielding cover 100. The textured gasket 700 can be provided to increase the friction resistance between the bent housing 400 and the bent shielding cover 100, thereby preventing the assembly personnel from making misoperations. For example, the assembly personnel rotate the electrical connector assembly 200, causing the pressure sensor electrical connector 250 to rotate and damage the RTV silicone at the riveted bending position of the electrical connector assembly 200 and the housing 400, resulting in inaccurate changes in the internal structure and the RTV silicone breaking and losing the waterproofing ability.

[0068] Specifically, the material of the reticulated gasket 700 is PEEK.

[0069] The upper and lower surfaces of the textured gasket 700 have stripes to enhance its friction. The material is corrosion-resistant, tear-resistant, and wear-resistant. It is not easy to rotate relative to the metal after contacting, and the rotation of the electrical connector assembly 200 is effectively prevented.

[0070] The housing 400 is made of brass which has high mechanical strength, corrosion resistance, and good electromagnetic shielding effect.

[0071] The upper wall thickness of the housing 400 is 0.6-0.8 mm, which can be selected according to the pressure resistance requirements of the product. The upper end is riveted and bent to form a compression connection with the electrical connector assembly 200 and the textured gasket 700. The compression connection gap is coated with RTV silicone, which can prevent external water vapor from entering the FPC conditioning circuit 320, protect the internal circuit, and save the step of setting an O-ring seal on the side of the electrical connector assembly 200.

[0072] The shielding cover 100 is made of aluminum alloy. The shielding cover 100 is cylindrical in shape. The bottom wall thickness of the shielding cover 100 is set to about 1.5mm, which can effectively prevent the bottom of the inner shielding cover 100 from being deformed due to high pressure extrusion. The side thickness is set to about 0.3-0.6mm. A structural opening 110 for the medium to enter is provided in the center of the bottom. The material will not cause safety hazards such as damage under the pressure impact of refrigerant and other media.

[0073] Preferably, an insulating coating is provided on the outside of the shielding cover 100. The insulating coating is a polyparaxylene coating, and the polyparaxylene coating is located on the outer surface of the shielding cover 100. The polyparaxylene coating is formed on the outside of the shielding cover 100 by a chemical vapor deposition process (CVD). The shielding cover 100 can have excellent wear resistance, and the insulation resistance is greater than 100MΩ. The thickness of the insulating coating is preferably 145um, and the insulating high voltage can be 3KV or more. The insulating coating is resistant to acid, alkali and organic solvents, and has excellent barrier protection against harsh environments such as salt spray and water vapor.

[0074] The pressure sensor further includes a first inner sealing ring 810 disposed below the pressure sensing element 310 .

[0075] The material of the first inner sealing ring 810 is usually HNBR or EPDM which is corrosion-resistant, tear-resistant, wear-resistant, compression-deformation-resistant, high and low temperature-resistant and insulating. The material is selected according to the use temperature and medium. The compression amount of the sealing ring is usually between 20% and 25%.

[0076] The pressure sensor further includes a retaining ring 820, which is disposed at the outer edge of the first inner sealing ring 810. The retaining ring 820 can prevent the inner sealing ring from being "extruded" and causing leakage under the action of high-pressure medium, and plays a dual role of insulation and sealing.

[0077] The retaining ring 820 is made of polytetrafluoroethylene with excellent corrosion resistance and good insulation performance.

[0078] The pressure sensor further includes a second inner sealing ring 830 , which is disposed at the outer bottom of the shielding cover 100 to prevent the medium from leaking through the gap between the shielding cover 100 and the housing 400 .

[0079] The material of the second inner sealing ring 830 is usually HNBR or EPDM which is corrosion-resistant, tear-resistant, wear-resistant, compression-deformation-resistant, high and low temperature-resistant and insulating. Usually, the compression amount of the sealing ring is between 20% and 25%.

[0080] The second potting glue layer 620 is one of silicone resin, epoxy resin, room temperature vulcanized silicone or polyurethane. Preferably, the second potting glue layer 620 is polyurethane. During production, the potting glue is injected from the structural cavity formed by the upper cover 500 and the electrical connector assembly 200 until the potting glue is flush with the upper end surface of the upper cover 500.

[0081] In this embodiment, the pressure sensor has the following beneficial effects:

[0082] First, the welding operability is strong and the assembly is simple. The plug pin 240 and the electrical connector 250 are sealed to form a whole. Before the upper cover 500 is installed, the plug pin 240 and the wiring harness 260 are soldered with lead-free tin. Since the plug pin 240 is completely exposed to the outside at this time, the welding operability is strong; when the upper cover 500 is installed, the limited protrusion 510 is set inside the upper cover 500 and the structural groove 210 is set on the side of the electrical connector assembly 200, and the two are connected by snap-fitting, which is fast to assemble and has good effect. And the size value can be controlled to avoid the leakage of the potting glue from the joint of the upper cover 500 and the electrical connector assembly 200 in the later stage.

[0083] Secondly, the protection level is high. The upper cover 500 completely covers the entire pin 240 and part of the wiring harness 260 welding position through the first potting glue layer 610. When the upper end surface of the shell 400 is bent, it will press the internal components. In addition, the RTV silicone is coated on the riveted bend to further prevent internal water vapor from entering, achieving the purpose of waterproof and dustproof. The protection level can be as high as IP69, making the pressure sensor less likely to fail in environments such as corrosion, dirt, and water vapor.

[0084] Thirdly, the structure is stable and there is no precision drift. The traditional method of simultaneously pouring glue at the riveted bending position of the pressure sensor housing 400 and the welding position of the pin 240 is changed to a separate pouring method. The first potting glue layer 610 is used for potting at the welding position of the pin 240 and the wiring harness 260, and RTV silicone is applied to the riveted bending position of the housing 400. Since RTV silicone is relatively soft, the extrusion stress generated by the silicone on the riveted bending position of the housing 400 during the temperature change from -40°C to 135°C is extremely small and can be ignored. Therefore, this structure is more stable, the internal structure of the pressure sensor is consistent before and after calibration, and the internal structure does not change much during use, and there will be no precision drift and other phenomena.

[0085] Finally, the fault tolerance rate is high. During the assembly process of the pressure sensor client, it is very easy for the assembler to rotate the electrical connector assembly 200 by mistake, causing the pressure sensor electrical connector 250 to rotate and damage the RTV silicone at the riveted bending position of the electrical connector 250 and the shell 400. By setting the transition effect of the rough mesh gasket 700, the friction between it and the metal after riveting and bending is increased, which can prevent the assembler from making mistakes, resulting in inaccurate precision of internal structure changes and RTV silicone breaking and losing its waterproof ability.

[0086] The above description is only a description of the preferred embodiment of the utility model, and is not any limitation on the scope of the utility model. Any changes and modifications made by ordinary technicians in the field of the utility model based on the above disclosure shall fall within the scope of protection of the claims.

Claims

1. A pressure sensor, comprising a shielding cover, characterized in that: Also includes: An electric connector assembly, one end of which extends into the shielding cover and forms a shielding cavity with the shielding cover, and the shielding cover is riveted to the electric connector assembly after being bent; A pressure sensing component is disposed in the shielding cavity; A shell having a cavity for accommodating the shielding cover, wherein one end of the shell close to the electrical connector assembly is bent and then riveted to the shielding cover; as well as, The upper cover is sleeved outside the electrical connector assembly and is detachably fixedly connected to the electrical connector assembly.

2. The pressure sensor according to claim 1, characterized in that Also includes: A first potting glue layer is filled in the structural cavity formed by the upper cover and the electrical connector assembly; as well as, A second potting glue layer is filled in the gap formed by the housing and the shielding cover; Wherein, the second potting glue layer is soft glue.

3. The pressure sensor according to claim 1, wherein: A mesh gasket is arranged between the bending part of the shell and the bending part of the shielding cover.

4. The pressure sensor according to claim 1, wherein: The upper cover is clamped with the electrical connector assembly.

5. The pressure sensor according to claim 4, characterized in that: A structural groove is provided on the electrical connector assembly, and a limiting protrusion is protruded on the inner wall of the upper cover, and the limiting protrusion is clamped with the structural groove.

6. The pressure sensor according to claim 1, wherein: A limiting boss is arranged on a surface of the electrical connector component opposite to the pressure sensing component, and the limiting boss cooperates with the pressure sensing component.

7. The pressure sensor according to claim 2, characterized in that: The soft glue is RTV silicone.

8. The pressure sensor according to claim 1, wherein: An insulating coating is arranged on the outer side of the shielding cover.

9. The pressure sensor according to claim 8, characterized in that The insulating coating comprises a poly-para-xylene coating, and the poly-para-xylene coating is located on the outer surface of the shielding cover.

10. The pressure sensor according to claim 1, wherein: The pressure sensor further comprises a first inner sealing ring and a retaining ring, wherein the first inner sealing ring is arranged below the pressure sensing component, and the retaining ring is arranged at the outer edge of the first inner sealing ring.

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