A pressure sensor base of a split chamber structure

Abstract

The utility model discloses a pressure sensor base of separate chamber structure relates to sensor technical field, and it is including: base shell and lead, the base shell is equipped with the front cavity and rear cavity that are independent of each other, the base shell side is provided with lead hole, first oil filling cavity and second oil filling cavity, wherein, the lead extends to the front cavity in the lead hole is penetrated, and the first oil filling cavity is linked together with the front cavity, the second oil filling cavity is linked together with the rear cavity. Advantageous effects: through design independent front cavity and rear cavity, and lead is drawn from the base shell side and is linked together with the front cavity, has avoided the occupation to rear cavity space, has formed independent rear cavity structure, satisfies the use demand of special custom environment, can guarantee the planeness of connecting section nail head face, position degree and the consistency of lead top height simultaneously, promotes the detection accuracy and stability of sensor.

Description

Technical Field

[0001] This utility model relates to the field of sensor technology, and more specifically, to a pressure sensor base with a split chamber structure. Background Technology

[0002] Pressure sensors are widely used in various pressure detection scenarios. As the core component of pressure sensors, the structural design of the base directly affects the installation stability, performance, and applicability of the sensor.

[0003] Traditional pressure sensor bases often use common T-shaped leads, which are poorly designed and occupy the rear cavity space of the base, preventing the formation of an independent rear cavity structure and limiting the sensor's use in special environments. Furthermore, traditional lead structures have lower requirements for the sintering process and are not optimized for lead installation accuracy. This makes it difficult to ensure the flatness, position, and consistency of the lead head surface and the height of the lead top, thus affecting the sensor's detection accuracy and lifespan.

[0004] There are currently no effective solutions to the problems in the relevant technologies. Utility Model Content

[0005] To address the problems in related technologies, the purpose of this utility model is to propose a pressure sensor base with a split chamber structure, which solves the problems of traditional bases having an inability to independently accommodate the rear chamber space and insufficient accuracy in lead wire installation, thus making them unsuitable for use in special customized environments.

[0006] The technical solution of this utility model is implemented as follows: A pressure sensor base with a split chamber structure includes: a base housing and a lead wire. The base housing has an independent front chamber and a rear chamber. The side of the base housing has a lead wire hole, a first oil-filling chamber, and a second oil-filling chamber. The lead wire extends through the lead wire hole into the front cavity, and the first oil-filled cavity is connected to the front cavity; The second oil-filled cavity is connected to the rear cavity.

[0007] Furthermore, the lead includes a connecting section, a sealing section, and a lead-out section connected in sequence. The connecting section is used for soldering to the chip, the sealing section is fitted to the inner wall of the lead hole and fixed by a sintering process, and the lead-out section extends horizontally along the side of the housing.

[0008] Furthermore, the end of the connecting section is provided with a nail head surface, which is a flat contact surface.

[0009] Furthermore, the first oil-filling chamber and the second oil-filling chamber are respectively fixed with brazed air pipes by brazing process, which are used to inject pressure transmission oil.

[0010] Furthermore, the front cavity is also provided with a mounting slot, in which the sensor chip is mounted and electrically connected to the lead wire.

[0011] Furthermore, several of the leads are arranged in a horizontal array.

[0012] The beneficial effects of this utility model are: This invention features an independent front and rear cavity design, with the lead wire extending from the side of the base housing and connecting to the front cavity. This avoids occupying space in the rear cavity, forming an independent rear cavity structure that meets the needs of special customized environments. Simultaneously, the specially designed lead wire structure imposes precise requirements on the sintering process, ensuring consistency in the flatness, position, and top height of the lead wire on the connecting section nail head, thus improving the sensor's detection accuracy and stability. The overall structural design is reasonable, and the separation of the front and rear cavities, along with the brazed gas pipe, ensures the product's usability and reliability.

[0013] Other features and advantages of this invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objectives and other advantages of this invention are realized and obtained through the structures particularly pointed out in the description and the accompanying drawings.

[0014] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the structure of the pressure sensor base with a split chamber structure according to an embodiment of the present utility model; Figure 2 This is a top view schematic diagram of a pressure sensor base with a split chamber structure according to an embodiment of the present utility model; Figure 3 The pressure sensor base with a split chamber structure according to an embodiment of the present invention. Figure 2 AA sectional view; Figure 4 This is a schematic diagram of the lead structure of the pressure sensor base with a split chamber structure according to an embodiment of the present invention.

[0017] In the picture: 1. Base housing; 2. Lead wire; 3. Front cavity; 4. Rear cavity; 5. Lead wire hole; 6. First oil filling chamber; 7. Second oil filling chamber; 8. Brazing gas pipe; 9. Mounting groove; 21. Connecting section; 22. Sealing section; 23. Lead-out section. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model are within the protection scope of the present utility model.

[0019] According to an embodiment of the present invention, a pressure sensor base with a split chamber structure is provided.

[0020] like Figures 1-4 As shown, a pressure sensor base with a split chamber structure includes: a base housing 1 and a lead wire 2. The base housing 1 has an independent front cavity 3 and a rear cavity 4. The side of the base housing has a lead wire hole 5, a first oil filling cavity 6 and a second oil filling cavity 7. The lead wire 2 extends through the lead wire hole 5 into the front cavity 3, and the first oil filling cavity 6 is connected to the front cavity 3. The second oil filling cavity 7 is connected to the rear cavity 4.

[0021] The base shell 1 is integrally formed from high-temperature and corrosion-resistant metal material. During processing, the front cavity 3, rear cavity 4, lead wire hole 5, first oil filling cavity 6 and second oil filling cavity 7 are precisely opened to ensure that the dimensional accuracy and positional tolerance of each cavity and hole meet the design requirements.

[0022] In addition, lead 2 includes a connecting section 21, a sealing section 22 and a lead-out section 23 connected in sequence. The connecting section 21 is used for soldering to the chip. The sealing section 22 is attached to the inner wall of the lead hole 5 and fixed by a sintering process. The lead-out section 23 extends horizontally along the side of the housing. The end of the connecting section 21 is provided with a nail head surface, which is a flat contact surface.

[0023] In this technical solution, the lead wire 2 is integrally processed according to the structure of the connecting section 21, the sealing section 22, and the lead-out section 23. The nail head surface at the end of the connecting section 21 is polished, and the lead-out section 23 maintains horizontal straightness.

[0024] Specifically, the connecting segment 21 of lead 2 is inserted into the front cavity 3 through the lead hole 5, ensuring that the sealing segment 22 is tightly fitted against the inner wall of the lead hole 5. Several leads 2 are arranged in a horizontal array. Simultaneously, a high-temperature sintering process is used to fix the joint between the sealing segment 22 and the lead hole 5, ensuring sealing performance and preventing oil leakage. After sintering, the height consistency of the nail head surface of the connecting segment 21 is checked to ensure the flatness of subsequent chip soldering.

[0025] In addition, the first oil filling chamber 6 and the second oil filling chamber 7 are respectively fixed with brazed air pipes 8 by brazing process, which are used to inject pressure transmission oil.

[0026] Specifically, the brazing gas pipe 8 is made of a metal pipe compatible with the material of the base shell 1, and the surface oxide layer is removed in advance to ensure the bonding strength during brazing; the brazing gas pipe 8 is aligned with the interface of the first oil filling chamber 6 and the second oil filling chamber 7 respectively, and fixed by brazing process.

[0027] In addition, the sensor chip is precisely embedded in the mounting slot 9 in the front cavity 3 to ensure that the chip detection surface is in contact with the internal environment of the front cavity 3 and that the chip pins correspond to the connection section 21 of the lead wire 2. The chip pins are welded and fixed to the nail head surface of the connection section 21 by spot welding process to complete the electrical connection between the chip and the lead wire and ensure the stability of signal transmission.

[0028] In addition, during implementation, pressure-transfer oil is injected into the front cavity 3 through the brazed air pipe 8 corresponding to the first oil-filling cavity 6. During the injection process, the pressure is slowly increased to expel the air in the cavity until the oil fills the front cavity 3 and there are no air bubbles left. Pressure-transfer oil is injected into the rear cavity 4 through the brazed air pipe 8 corresponding to the second oil-filling cavity 7 in the same way. Depending on the application scenario, oils with the same or different characteristics can be selected.

[0029] In summary, the following effects can be achieved by using the above-mentioned technical solution of this utility model: by designing independent front cavity 3 and rear cavity 4, and leading wire 2 out from the side of base housing 1 and connecting it to front cavity 3, the space occupied by rear cavity 4 is avoided, forming an independent rear cavity 4 structure, which meets the usage requirements of special customized environments; at the same time, the specially designed lead wire 2 structure design puts forward precise requirements on the sintering process, which can ensure the flatness, position, and consistency of the nail head surface of the connecting section 21 and the height of the lead wire top, thereby improving the detection accuracy and stability of the sensor. The overall structural design is reasonable, and the usability and reliability of the product are ensured by the separate setting of front cavity 3 and rear cavity 4 and the cooperation of brazed gas pipe 8.

[0030] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A pressure sensor base with a split chamber structure, characterized in that, Includes: a base housing (1) and a lead wire (2), wherein the base housing (1) is provided with a front cavity (3) and a rear cavity (4) that are independent of each other, and the side of the base housing is provided with a lead wire hole (5), a first oil filling cavity (6) and a second oil filling cavity (7); The lead wire (2) extends through the lead wire hole (5) into the front cavity (3), and the first oil-filled cavity (6) is connected to the front cavity (3); The second oil-filled cavity (7) is connected to the rear cavity (4).

2. The pressure sensor base with a split chamber structure according to claim 1, characterized in that, The lead (2) includes a connecting section (21), a sealing section (22) and a lead-out section (23) connected in sequence. The connecting section (21) is used for soldering to the chip. The sealing section (22) is attached to the inner wall of the lead hole (5) and fixed by a sintering process. The lead-out section (23) extends horizontally along the side of the housing.

3. The pressure sensor base with a split chamber structure according to claim 2, characterized in that, The end of the connecting section (21) is provided with a nail head surface, which is a flat contact surface.

4. The pressure sensor base with a split chamber structure according to claim 1, characterized in that, The first oil filling chamber (6) and the second oil filling chamber (7) are respectively fixed with brazed air pipes (8) by brazing process, which are used to inject pressure transmission oil.

5. A pressure sensor base with a split chamber structure according to claim 1, characterized in that, The front cavity (3) is also provided with a mounting slot (9), in which the sensor chip is installed and electrically connected to the lead wire (2).

6. A pressure sensor base with a split chamber structure according to claim 5, characterized in that, Several of the leads (2) are arranged in a horizontal array.

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