Gpf differential pressure sensor housing structure

Abstract

The application relates to a GPF differential pressure sensor shell structure and relates to the technical field of differential pressure sensor shells. In order to solve the problem that a gap exists between an existing shell structure and a sensor body, the application comprises a shell accommodating a sensor body, the shell comprises an upper shell part and a lower shell part, the upper shell part and the lower shell part are arranged in a clamped manner, and the upper shell part and the lower shell part jointly enclose a sensor body mounting area, the inner walls of the upper shell part and the lower shell part are each provided with an annular groove, an annular gasket is embedded in the annular groove, the inner ring surface of the annular gasket protrudes from the annular groove and extends in the direction of the mounting area, and the upper shell part and the lower shell part are respectively provided with a first interface and a second interface; and a connecting assembly for mounting with a vehicle frame is further arranged outside the upper shell part and the lower shell part. The application has the effects of effectively reducing the gap between the shell and the sensor body, reducing the possibility of stress concentration, and prolonging the service life of the GPF differential pressure sensor.

Description

Technical Field

[0001] This application relates to the field of differential pressure sensor housing technology, and in particular to a GPF differential pressure sensor housing structure. Background Technology

[0002] GPF differential pressure sensor is one of the core components of automotive exhaust aftertreatment systems, mainly used to monitor the gas pressure difference between the front and rear ends of the GPF in real time. When the GPF becomes clogged due to particulate matter accumulation, the pressure difference between its front and rear ends will increase significantly. The sensor will feed the signal back to the engine control unit, triggering the GPF regeneration program, thereby preventing engine performance degradation or damage. The housing of the GPF differential pressure sensor must meet stringent requirements such as high sealing performance, high temperature resistance, vibration resistance, and corrosion resistance to protect the internal sensitive elements from the effects of high exhaust temperature, particulate impact, and chemical corrosion. To adapt to diverse installation positions on the vehicle frame, such as narrow spaces, irregular holes, or vibrating environments, some designs will add an adapter housing outside the traditional sensor housing. This adapter housing must match the mounting holes on the frame while also ensuring structural strength to ensure the long-term stability of the sensor under complex operating conditions.

[0003] To address the compatibility issue between GPF differential pressure sensors and automotive frame mounting holes, existing technologies typically involve adding a compatible housing to the outside of the traditional sensor housing. However, with such a housing structure, once a gap appears between it and the sensor body, stress concentration areas easily form in the gap region when subjected to vibration or impact loads. As the number of load applications increases, this eventually leads to housing breakage and sensor detachment, thus requiring improvement. Utility Model Content

[0004] To address the issue of gaps between existing housing structures and the sensor body, this application provides a housing structure for a GPF differential pressure sensor.

[0005] The technical solution for the housing structure of the GPF differential pressure sensor provided in this application is as follows: A GPF differential pressure sensor housing structure includes a housing for accommodating a sensor body. The housing comprises an upper housing portion and a lower housing portion, which are arranged opposite each other and together enclose a mounting area for the sensor body. An annular groove is formed on the inner wall of both the upper and lower housing portions, and an annular gasket is embedded within the annular groove. The inner annular surface of the annular gasket protrudes from the annular groove and extends towards the mounting area. A first interface and a second interface are respectively provided on the upper and lower housing portions. A connecting assembly for mounting to a vehicle frame is also provided on the exterior of the upper and lower housing portions.

[0006] For this type of adaptable housing structure, once a gap appears between it and the sensor body, the gap area is prone to stress concentration when subjected to vibration or impact loads. As the number of loads increases, the housing will eventually break and the sensor will fall off. By adopting the above technical solution, including a housing, the housing is formed by the joining of an upper housing and a lower housing. The inner walls of the upper housing and the lower housing are provided with annular grooves, and annular gaskets are embedded in the annular grooves. At the same time, the connecting components are installed on the outside of the upper housing and the lower housing. When assembling the housing, prepare all the necessary components. Embed the annular gaskets into the annular grooves of the upper and lower housings respectively, ensuring that the annular gaskets can make good contact with the sensor body to provide cushioning and sealing. Then place the first sealing ring into the sealing groove of the upper or lower housing, ensuring that the first sealing ring is fully embedded in the sealing groove. Place the sensor body in the installation area formed by the upper and lower housings, so that the sensor body contacts the inner ring surface of the annular gasket. Initially adjust the position of the sensor body to ensure that its installation direction is correct. Slowly align the upper and lower housings together, so that the mating surfaces of the upper and lower housings are fully fitted and the waist-shaped positioning parts cooperate with each other. After the upper and lower housings are aligned, align the positioning pins with the positioning holes on the waist-shaped positioning parts of the upper and lower housings, insert the positioning pins into the positioning holes, and then put the dustproof sleeves on the outer ends of the first and second interfaces respectively. According to the design requirements, install and connect the connecting bracket to the vehicle frame. By incorporating an upper shell, a lower shell, an annular gasket, and connecting components, the gap between the outer shell and the sensor body can be effectively reduced, lowering the possibility of stress concentration. The embedded annular gasket acts as a buffer and further fills any gaps that may exist, making the connection between the sensor body and the outer shell more stable, avoiding excessive local stress concentration, effectively preventing shell breakage and sensor detachment, and improving the service life of the GPF differential pressure sensor.

[0007] Optionally, a first sealing ring is provided between the mating surfaces of the upper shell and the lower shell.

[0008] By adopting the above technical solution, the first sealing ring is installed on the mating surfaces of the upper and lower shells; the setting of the first sealing ring can effectively block external dust, moisture and other impurities from entering the internal installation area of ​​the shell, preventing them from corroding and interfering with the sensor body.

[0009] Optionally, both the upper and lower shells have sealing grooves on their mating surfaces to accommodate the first sealing ring.

[0010] By adopting the above technical solution, a sealing groove is opened on the mating surface of the upper shell and the lower shell; the sealing groove provides an installation position for the first sealing ring, so that the first sealing ring can be embedded therein, and it is not easy to shift or fall off, thus ensuring the sealing performance of the first sealing ring.

[0011] Optionally, both the first and second interfaces are fitted with dustproof sleeves on their outer ends.

[0012] By adopting the above technical solution, dustproof sleeves are respectively fitted onto the outer ends of the first interface and the second interface; by setting the dustproof sleeves, dust and other impurities can be effectively blocked from entering the interface, avoiding the impact of impurity accumulation or entry into the sensor's interior on its normal operation, and ensuring that the sensor can detect stably.

[0013] Optionally, the first and second interfaces are provided with annular protrusions on their pipe walls, which are used to limit the axial position of the dustproof sleeve.

[0014] By adopting the above technical solution, the annular ridge is formed on the pipe wall of the first and second interfaces; the setting of the annular ridge can effectively limit the axial position of the dustproof sleeve, prevent it from moving under the action of external forces such as vibration, and ensure that the dustproof sleeve is always tightly fitted to the outer end of the interface.

[0015] Optionally, the connecting assembly includes a connecting bracket, which is arranged on the outer wall of the upper shell or the lower shell, and the connecting bracket has mounting holes.

[0016] By adopting the above technical solution, the connection component includes a connection bracket, and mounting holes are opened on the connection bracket. Through the setting of the connection bracket and mounting holes, the connection bracket provides a supporting foundation for the housing structure, ensuring that a reliable connection can be formed between the housing and the vehicle frame. The mounting holes, by adapting to fasteners such as bolts of different specifications, fix the sensor on the vehicle frame, thereby improving the stability of sensor installation.

[0017] Optionally, both sides of the upper shell and the lower shell are provided with waist-shaped positioning parts, and positioning holes are opened on the waist-shaped positioning parts, with positioning posts provided in the corresponding positioning holes.

[0018] By adopting the above technical solution, the waist-shaped positioning part is formed on both sides of the upper shell and the lower shell. The waist-shaped positioning part has positioning holes, and the positioning pin is inserted into the positioning holes and has an interference fit with the positioning holes. Through the setting of the waist-shaped positioning part, positioning holes and positioning pins, the waist-shaped positioning part provides installation guidance for the positioning pins, so that the upper shell and the lower shell can quickly find the corresponding positions, improving the assembly efficiency. At the same time, the interference fit between the positioning pins and the positioning holes ensures that the upper shell and the lower shell are firmly connected after assembly.

[0019] Optionally, reinforcing ribs are provided on both outer surfaces of any of the waist-shaped positioning parts, and the reinforcing ribs are provided along the contour edge of the waist-shaped positioning part.

[0020] By adopting the above technical solution, reinforcing ribs are welded and fixed on both sides of the waist-shaped positioning part; by setting the reinforcing ribs, the structural strength of the waist-shaped positioning part is enhanced, so that it can better disperse stress when facing external impact, and effectively avoid problems such as deformation and damage of the waist-shaped positioning part caused by stress concentration.

[0021] In summary, this application includes at least one of the following beneficial technical effects: 1. By using the upper shell, lower shell, annular gasket and connecting components, the gap between the shell and the sensor body can be effectively reduced, reducing the possibility of stress concentration. The embedded annular gasket plays a buffering role and can further fill any gaps that may exist, making the connection between the sensor body and the shell more stable, avoiding excessive local stress concentration, effectively preventing shell breakage and sensor detachment, and improving the service life of the GPF differential pressure sensor. 2. By setting up connecting brackets and mounting holes, the connecting brackets provide a supporting foundation for the housing structure, ensuring a reliable connection between the housing and the vehicle frame. The mounting holes, by adapting to bolts and other fasteners of different specifications, fix the sensor to the vehicle frame, improving the stability of sensor installation. 3. Through the setting of waist-shaped positioning part, positioning hole and positioning post, waist-shaped positioning part provides installation guide for positioning post, so that upper shell part and lower shell part can quickly find the corresponding position, improving assembly efficiency. At the same time, the interference fit between positioning post and positioning hole ensures that upper shell part and lower shell part are firmly connected after assembly. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the housing structure of a GPF differential pressure sensor in an embodiment of this application.

[0023] Figure 2 This is a structural schematic diagram illustrating the connecting component in the embodiments of this application.

[0024] Figure 3 This is a cross-sectional view of the housing structure of a GPF differential pressure sensor according to an embodiment of this application.

[0025] Explanation of reference numerals in the attached drawings: 1. Outer shell; 101. Upper shell; 102. Lower shell; 2. Annular groove; 3. Annular gasket; 4. First interface; 5. Second interface; 6. Connecting assembly; 601. Connecting bracket; 7. First sealing ring; 8. Sealing groove; 9. Dustproof sleeve; 10. Annular protrusion; 11. Mounting hole; 12. Waist-shaped positioning part; 13. Positioning hole; 14. Positioning post; 15. Reinforcing rib. Detailed Implementation

[0026] The following is in conjunction with the appendix Figure 1-3 This application will be described in further detail.

[0027] This application discloses a housing structure for a GPF differential pressure sensor. (Refer to...) Figure 1 The GPF differential pressure sensor housing structure includes a housing 1, which is used to house the sensor body. In this embodiment, the housing 1 is a conventional sensor housing 1 with an external fitting shell. The internal shape of the housing 1 is similar to the shape of the sensor body housing.

[0028] Reference Figure 1 and Figure 3 The outer shell 1 includes an upper shell portion 101 and a lower shell portion 102, which are arranged opposite each other. The upper shell portion 101 and the lower shell portion 102 together enclose a region for mounting the sensor body. The inner walls of the upper shell portion 101 and the lower shell portion 102 are provided with annular grooves 2. Annular gaskets 3 are embedded in the annular grooves 2. In this embodiment, the annular gaskets 3 can be made of elastic material. The inner annular surface of the annular gaskets 3 protrudes from the annular grooves 2 and extends towards the mounting region, so that the sensor body contacts the inner annular surface of the annular gaskets 3, eliminating the gap between the sensor body and the outer shell 1.

[0029] Reference Figure 1 The upper shell 101 and the lower shell 102 are respectively formed with a first interface 4 and a second interface 5. The first interface 4 and the second interface 5 are precisely connected to the corresponding interfaces on the sensor body. Their function is to build a channel to connect with the external detection port so as to realize normal detection.

[0030] Reference Figure 1 The outer ends of the first interface 4 and the second interface 5 are both covered with dustproof sleeves 9. The dustproof sleeves 9 can effectively block dust and other impurities from entering the interface, avoid the accumulation of impurities or their entry into the sensor and affect its normal operation, and ensure that the sensor can detect stably.

[0031] Reference Figure 1 An annular protrusion 10 is integrally formed on the pipe wall of the first interface 4 and the second interface 5. The annular protrusion 10 is used to limit the axial position of the dustproof sleeve 9. It can effectively limit the axial position of the dustproof sleeve 9, prevent it from moving under the action of external forces such as vibration, and ensure that the dustproof sleeve 9 is always tightly fitted to the outer end of the interface.

[0032] Reference Figure 1 and Figure 3A first sealing ring 7 is installed between the mating surfaces of the upper shell 101 and the lower shell 102. At the same time, both the mating surfaces of the upper shell 101 and the lower shell 102 are provided with sealing grooves 8 for accommodating the first sealing ring 7. The first sealing ring 7 can effectively block external dust, moisture and other impurities from entering the internal installation area of ​​the outer shell 1, preventing them from corroding and interfering with the sensor body. At the same time, the sealing groove 8 provides an installation position for the first sealing ring 7, so that the first sealing ring 7 can be embedded therein, and it is not easy to shift or fall off, thus ensuring the sealing performance of the first sealing ring 7.

[0033] Reference Figure 1 and Figure 2 Both sides of the upper shell 101 and the lower shell 102 are integrally formed with waist-shaped positioning parts 12. Positioning holes 13 are opened through the waist-shaped positioning parts 12. The positioning holes 13 of the waist-shaped positioning parts 12 of the upper shell 101 and the lower shell 102 on the same side are arranged coaxially. Positioning pins 14 are inserted and fixed in the two corresponding positioning holes 13 and are interference fit with the positioning holes 13. The waist-shaped positioning parts 12 provide installation guides for the positioning pins 14, so that the upper shell 101 and the lower shell 102 can quickly find the corresponding positions, improving the assembly efficiency. At the same time, the interference fit between the positioning pins 14 and the positioning holes 13 ensures that the upper shell 101 and the lower shell 102 are firmly connected after assembly.

[0034] Reference Figure 1 and Figure 2 Each of the waist-shaped positioning parts 12 has a reinforcing rib plate 15 welded and fixed on both outer surfaces. The reinforcing rib plate 15 is set along the contour edge of the waist-shaped positioning part 12. This enhances the structural strength of the waist-shaped positioning part 12, enabling it to better disperse stress when facing external impact, and effectively avoids problems such as deformation and damage of the waist-shaped positioning part 12 caused by stress concentration.

[0035] Reference Figure 1 and Figure 2 A connecting component 6 is also installed on the outside of the upper shell 101 and the lower shell 102. The connecting component 6 is used to install with the external frame. The connecting component 6 includes a connecting bracket 601, which is fixedly arranged on the outer wall of the upper shell 101 or the lower shell 102. A mounting hole 11 is provided through the connecting bracket 601. In this embodiment, the connecting brackets 601 of the upper shell 101 and the lower shell 102 are located on the same side. The connecting bracket 601 provides a supporting foundation for the structure of the outer shell 1, ensuring that a reliable connection can be formed between the outer shell 1 and the frame. The mounting hole 11 is used to fix the sensor on the frame by fitting fasteners such as bolts of different specifications, which improves the stability of the sensor installation.

[0036] The implementation principle of the GPF differential pressure sensor housing structure in this application embodiment is as follows: When assembling the housing 1, prepare all the components required for assembly. Embed the annular gasket 3 into the annular groove 2 of the upper housing 101 and the lower housing 102 respectively, ensuring that the annular gasket 3 can make good contact with the sensor body, thus providing buffering and sealing. Then, place the first sealing ring 7 into the sealing groove 8 of the upper housing 101 or the lower housing 102, ensuring that the first sealing ring 7 is fully embedded in the sealing groove 8. Place the sensor body in the installation area formed by the upper housing 101 and the lower housing 102, so that the sensor body is in contact with the annular groove 2. The inner ring surface of the gasket 3 contacts, and the position of the sensor body is initially adjusted to ensure that its installation direction is correct. The upper shell 101 and the lower shell 102 are slowly put together so that the mating surfaces of the upper shell 101 and the lower shell 102 are completely fitted. The waist-shaped positioning parts 12 cooperate with each other. After the upper and lower shells 102 are put together, the positioning pin 14 is aligned with the positioning hole 13 on the waist-shaped positioning part 12 of the upper shell 101 and the lower shell 102. The positioning pin 14 is inserted into the positioning hole 13. Then, the dustproof leather sleeve 9 is put on the outer end of the first interface 4 and the second interface 5 respectively. According to the design requirements, the connecting bracket 601 is installed and connected to the vehicle frame. By using the upper shell 101, lower shell 102, annular gasket 3, and connecting assembly 6, the gap between the outer shell 1 and the sensor body can be effectively reduced, reducing the possibility of stress concentration. The embedded annular gasket 3 acts as a buffer and can further fill any gaps that may exist, making the connection between the sensor body and the outer shell 1 more stable, avoiding excessive local stress concentration, effectively preventing the outer shell 1 from breaking and the sensor from falling off, and improving the service life of the GPF differential pressure sensor.

[0037] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A housing structure for a GPF differential pressure sensor, comprising a housing for accommodating the sensor body, characterized in that: The outer shell includes an upper shell and a lower shell, which are arranged opposite each other and together enclose a region for mounting the sensor body. An annular groove is formed on the inner wall of both the upper and lower shells, and an annular gasket is embedded within the groove. The inner annular surface of the gasket protrudes from the groove and extends towards the mounting region. A first interface and a second interface are respectively provided on the upper and lower shells. A connecting assembly for mounting to a vehicle frame is also provided on the exterior of the upper and lower shells.

2. The housing structure of a GPF differential pressure sensor according to claim 1, characterized in that: A first sealing ring is provided between the mating surfaces of the upper shell and the lower shell.

3. The housing structure of a GPF differential pressure sensor according to claim 2, characterized in that: Both the upper and lower shells have sealing grooves on their mating surfaces to accommodate the first sealing ring.

4. The housing structure of a GPF differential pressure sensor according to claim 1, characterized in that: Both the first and second interfaces are fitted with dustproof sleeves on their outer ends.

5. The housing structure of a GPF differential pressure sensor according to claim 4, characterized in that: The first and second interfaces have annular protrusions on their pipe walls, which are used to limit the axial position of the dustproof sleeve.

6. The housing structure of a GPF differential pressure sensor according to claim 1, characterized in that: The connecting assembly includes a connecting bracket, which is arranged on the outer wall of the upper shell or the lower shell, and the connecting bracket has mounting holes.

7. The housing structure of a GPF differential pressure sensor according to claim 1, characterized in that: Both sides of the upper shell and the lower shell are provided with waist-shaped positioning parts, and positioning holes are opened on the waist-shaped positioning parts, with positioning posts provided in the corresponding positioning holes.

8. The housing structure of a GPF differential pressure sensor according to claim 7, characterized in that: Reinforcing ribs are provided on both outer surfaces of any of the waist-shaped positioning parts, and the reinforcing ribs are provided along the contour edge of the waist-shaped positioning part.

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