A PCB-side-mounted EMB sensor

Abstract

This utility model relates to the field of brake force sensor technology, and discloses a PCB-side-mounted EMB sensor, comprising: a base, including a pressure-bearing seat and an outer ring seat; the upper end face of the pressure-bearing seat is provided with a hydraulic groove, and the pressure-bearing seat is also provided with a mounting hole that runs along the axis and communicates with the hydraulic groove; the lower end face of the outer ring seat is provided with a placement groove; a sealing diaphragm, fixed on the pressure-bearing seat and forming a hydraulic cavity with the hydraulic groove, the hydraulic cavity being filled with hydraulic medium; a force-bearing block, fixed on the sealing diaphragm; a core, including a mounting post and a force-sensitive chip; the mounting post is disposed in the mounting hole, and the force-sensitive chip is disposed at one end of the mounting post and is used to detect the pressure of the hydraulic medium in the hydraulic cavity; a PCB, fixed in the placement groove; and a first conductive wire, one end of which is connected to the PCB, and the other end extending out of the outer ring seat. The PCB-side-mounted EMB sensor disclosed in this utility model solves the problems of difficult assembly and high connector processing costs in the prior art.

Description

Technical Field

[0001] This utility model relates to the field of braking force sensor technology, and in particular to a PCB-side-mounted EMB sensor. Background Technology

[0002] Currently, the PCB of electromechanical braking (EMB) sensors is typically located on top of the sensor structure, with conductive lines leading out from above for signal transmission or power connection. Because these lines extend from the top, they are prone to interference with other components when wiring within the confined space of a vehicle's braking system, increasing assembly difficulty. Furthermore, the force-sensitive chip of existing EMB sensors is fixed to an insulated connector for electrical isolation and mechanical support; however, the structure of this insulated connector is limited by traditional manufacturing processes, making flexible adjustments difficult and increasing production costs. Utility Model Content

[0003] Based on the above, the purpose of this utility model is to provide a PCB-side-mounted EMB sensor, which solves the problems of difficult assembly and high connector processing costs in the prior art.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A PCB-side-mounted EMB sensor includes:

[0006] The base includes a pressure seat and an outer ring seat disposed outside the pressure seat. The upper end face of the pressure seat is provided with a hydraulic groove. The pressure seat is also provided with a mounting hole that runs through the axis and communicates with the hydraulic groove. The lower end face of the outer ring seat is provided with a placement groove.

[0007] A sealing diaphragm is fixed on the pressure seat and forms a hydraulic cavity with the hydraulic groove, the hydraulic cavity being filled with hydraulic medium;

[0008] The force-bearing block is fixed on the sealing diaphragm;

[0009] The core includes a mounting post and a force-sensitive chip. The mounting post is disposed in the mounting hole, and the force-sensitive chip is disposed at one end of the mounting post and is used to detect the pressure of the hydraulic medium in the hydraulic chamber.

[0010] The PCB is fixed inside the placement slot;

[0011] The first conductive line has one end connected to the PCB and the other end extending out of the outer ring seat.

[0012] As a preferred embodiment of a PCB-side-mounted EMB sensor, the pressure seat is an annular pressure seat, the hydraulic groove is an annular pressure groove, the sealing diaphragm is an annular diaphragm, and the PCB-side-mounted EMB sensor also includes an inner pressure ring, which is fixed on the annular diaphragm and spaced apart from the force-bearing block.

[0013] As a preferred embodiment of a PCB-side-mounted EMB sensor, the force-bearing block is an annular plate, the inner diameter of which is larger than the inner diameter of the annular groove, and the outer diameter of which is smaller than the outer diameter of the annular groove.

[0014] As a preferred embodiment of a PCB-side-mounted EMB sensor, the lower end face of the base is provided with a countersunk hole. The PCB-side-mounted EMB sensor also includes a protective plate spaced apart from the PCB. The protective plate is fixed in the countersunk hole and the lower end face of the protective plate is higher than the lower end face of the base.

[0015] As a preferred embodiment of a PCB-side-mounted EMB sensor, the protection board has a through hole through which the first conductive wire extends out of the protection board.

[0016] As a preferred embodiment of a PCB-side-mounted EMB sensor, the base is provided with a liquid injection hole, one end of which is connected to the hydraulic chamber, and the other end is provided with a seal.

[0017] As a preferred embodiment of a PCB-side-mounted EMB sensor, the PCB-side-mounted EMB sensor further includes a second conductive line, one end of which is electrically connected to the metal PAD of the force-sensitive chip, and the other end extends out of the mounting post.

[0018] As a preferred embodiment of a PCB-side-mounted EMB sensor, the base is a metal base, the sealing diaphragm is a metal sheet, and the metal sheet is welded onto the metal base.

[0019] As a preferred embodiment of a PCB-side-mounted EMB sensor, the lower end face of the pressure seat is flush with the lower end face of the outer ring seat, and the two are integrally formed into the base.

[0020] In a preferred embodiment of a PCB-side-mounted EMB sensor, the hydraulic medium within the hydraulic chamber is either silicone oil or water.

[0021] The beneficial effects of this utility model are as follows:

[0022] The PCB-side-mounted EMB sensor disclosed in this utility model has a pressure-sensing main structure consisting of a pressure-bearing base and a force-bearing block, which increases the pressure-bearing contact area, suppresses bending deformation of the EMB sensor, and improves the reliability of the EMB sensor. The PCB is placed in the placement groove on the lower end face of the outer ring base, and the first conductive line is led out from the bottom of the outer ring base of the EMB sensor, which completely solves the installation interference problem of the traditional top lead method in the narrow braking space. It is suitable for braking systems with limited top installation space and significantly reduces the assembly difficulty. In addition, by mounting the PCB on the outer ring base, the overall thickness and weight of the EMB sensor are reduced, providing greater flexibility for the layout of the braking system. Compared with existing connectors, the mounting post disclosed in this utility model has a simple structure and reduced processing costs. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments of this utility model 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 the content of the embodiments of this utility model and these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of a PCB-side-mounted EMB sensor provided in a specific embodiment of this utility model;

[0025] Figure 2 This is a cross-sectional view of a PCB-side-mounted EMB sensor provided in a specific embodiment of this utility model;

[0026] Figure 3 This is a cross-sectional view of the base of the PCB-side-mounted EMB sensor provided in a specific embodiment of this utility model.

[0027] In the picture:

[0028] 1. Base; 101. Hydraulic chamber; 102. Countersunk hole; 103. Injection hole; 104. Clearance hole; 11. Pressure seat; 1101. Hydraulic groove; 1102. Mounting hole; 12. Outer ring seat; 1201. Placement groove;

[0029] 21. Sealing diaphragm; 22. Sealing element;

[0030] 3. Load-bearing block;

[0031] 4. Core; 41. Mounting post; 42. Force-sensitive chip; 421. Metal PAD;

[0032] 5. PCB;

[0033] 6. Inner pressure ring;

[0034] 7. Protective plate;

[0035] 81. First conductive wire; 82. Second conductive wire. Detailed Implementation

[0036] To make the technical problems solved by this utility model, the technical solutions adopted, and the technical effects achieved clearer, the technical solutions of the embodiments of this utility model will be further described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0037] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The terms "first position" and "second position" refer to two different positions.

[0038] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections or detachable connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; or internal connections between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0039] This embodiment provides a PCB-side-mounted EMB sensor, such as... Figures 1 to 3As shown, the device includes a base 1, a sealing diaphragm 21, a force-bearing block 3, a core 4, a PCB 5, and a first conductive wire 81. The base 1 includes a pressure-bearing seat 11 and an outer ring seat 12 disposed outside the pressure-bearing seat 11. The upper end face of the pressure-bearing seat 11 is provided with a hydraulic groove 1101, and the pressure-bearing seat 11 is also provided with a mounting hole 1102 that runs along the axis and communicates with the hydraulic groove 1101. The lower end face of the outer ring seat 12 is provided with a placement groove 1201. The sealing diaphragm 21 is fixed on the pressure-bearing seat 11 and forms a hydraulic cavity 101 with the hydraulic groove 1101. The hydraulic cavity 101 is filled with hydraulic medium. The force-bearing block 3 is fixed on the sealing diaphragm 21. The core 4 includes a mounting post 41 and a force-sensitive chip 42. The mounting post 41 is disposed in the mounting hole 1102, and the force-sensitive chip 42 is disposed at one end of the mounting post 41 and is used to detect the pressure of the hydraulic medium in the hydraulic cavity 101. The PCB 5 is fixed in the placement groove 1201, and one end of the first conductive wire 81 is connected to the PCB. 5 are connected, and the other end extends out of the outer ring seat 12.

[0040] In this embodiment, the PCB-side-mounted EMB sensor uses the pressure-receiving base 11 and the force-receiving block 3 as the main pressure-sensing structure, increasing the pressure-receiving contact area, suppressing the bending deformation of the EMB sensor, and improving the reliability of the EMB sensor. When the force-receiving block 3 or the base 1 is subjected to braking force, the braking force is transmitted sequentially through the force-receiving block 3 and the sealing diaphragm 21 to the liquid in the hydraulic chamber 101, and then acts on the force-sensitive chip 42 to realize the detection of braking force. The PCB 5 is placed in the placement groove 1201 on the lower end face of the outer ring seat 12, and the first conductive line 81 is led out from the bottom of the outer ring seat 12 of the EMB sensor, which completely solves the installation interference problem of the traditional top lead method in the narrow braking space. It is suitable for braking systems with limited top installation space and significantly reduces the assembly difficulty. In addition, by mounting the PCB 5 on the outer ring seat 12, the overall thickness and weight of the EMB sensor are reduced, providing greater flexibility for the layout of the braking system. Compared with existing connectors, the mounting post 41 provided in this embodiment has a simple structure and reduced processing cost.

[0041] Specifically, such as Figure 2 As shown, in this embodiment, the pressure seat 11 is an annular pressure seat, the hydraulic groove 1101 is an annular pressure groove, the sealing diaphragm 21 is an annular diaphragm, and the PCB-side EMB sensor also includes an inner pressure ring 6. The inner pressure ring 6 is fixed on the annular diaphragm and is spaced apart from the force-bearing block 3. The inner pressure ring 6 can increase the connection strength between the annular diaphragm and the pressure seat 11 and reduce the probability of the annular diaphragm detaching from the pressure seat 11. In this embodiment, the force-bearing block 3 is an annular plate. The inner diameter of the annular plate is larger than the inner diameter of the annular pressure groove, and the outer diameter of the annular plate is smaller than the outer diameter of the annular pressure groove. When the force-bearing block 3 is subjected to braking force, the sealing diaphragm 21 will deform, ensuring that the force-bearing block 3 moves downward with the sealing diaphragm 21.

[0042] It should be noted that in other embodiments of this utility model, the pressure seat 11 can also be a cylindrical pressure seat, the hydraulic groove 1101 is a circular pressure groove, the sealing diaphragm 21 is a circular diaphragm, and the force-bearing block 3 is a circular plate. In this case, the inner pressure ring 6 does not need to be set on the circular diaphragm, and an outer pressure ring can be selectively set on the circular diaphragm. Whether or not an outer pressure ring needs to be set depends on actual needs and is not limited here.

[0043] like Figures 1 to 3 As shown, the PCB-side EMB sensor in this embodiment also includes a protective plate 7 spaced apart from the PCB 5. The protective plate 7 has a through hole (not shown in the figure), through which the first conductive wire 81 extends out of the protective plate 7. The spaced arrangement between the protective plate 7 and the PCB 5 not only enhances heat dissipation and prevents damage to the PCB 5 due to overheating, but also reduces parasitic capacitance coupling between the PCB 5 and the protective plate 7, thereby reducing high-frequency signal interference. The lower end face of the base 1 has a countersunk hole 102 and a clearance hole 104. The protective plate 7 is fixed in the countersunk hole 102, and the lower end face of the protective plate 7 is higher than the lower end face of the base 1 to prevent the protective plate 7 from deforming under stress. The clearance hole 104 exposes the mounting post 41 and the second wire inside it, facilitating electrical connection with other structures. In addition, the side of PCB 5 is spaced apart from the side wall of the placement slot 1201. This structure not only facilitates the assembly of PCB 5 in the placement slot 1201, reducing assembly requirements and production costs, but also accommodates thermal deformation displacement, preventing PCB 5 from warping or cracking due to thermal expansion, thus extending the service life of PCB 5.

[0044] like Figure 3 As shown, the base 1 in this embodiment has a liquid injection hole 103. One end of the liquid injection hole 103 is connected to the hydraulic chamber 101, and the other end of the liquid injection hole 103 is provided with a sealing element 22. The hydraulic medium in the hydraulic chamber 101 is silicone oil. It should be noted that in other embodiments of this utility model, the number of liquid injection holes 103 on the base 1 can also be two, and each liquid injection hole 103 is provided with a sealing element 22. The sealing element 22 can seal the liquid injection hole 103. The number of liquid injection holes 103 is set according to actual needs. In other embodiments, the liquid injection hole 103 can also be completely sealed by welding using a welding column. The hydraulic medium can also be water or other liquid media, selected according to actual needs.

[0045] like Figure 1 and Figure 2As shown, the PCB-side EMB sensor in this embodiment also includes a second conductive line 82. One end of the second conductive line 82 is electrically connected to the metal PAD 421 of the force-sensitive chip 42, and the other end extends out of the mounting post 41. The mounting post 41 in this embodiment has a mounting groove (not shown in the figure), and one end of the second conductive line 82 extends into the mounting groove, where the force-sensitive chip 42 is fixed. Specifically, the force-sensitive chip 42 is fixed in the mounting groove with conductive adhesive or conductive silver paste, so that the metal PAD 421 of the force-sensitive chip 42 is electrically connected to the second conductive line 82. In this embodiment, the second conductive line 82 is a spring pin, and the mounting post 41 is a metal post, with the spring pin penetrating through the metal post.

[0046] In this embodiment, the base 1 is a metal base, and the sealing diaphragm 21 is a metal sheet, which is welded or bonded to the metal base. The protective plate 7 is a metal plate, which is welded or bonded to the base 1. In this embodiment, the lower end face of the pressure seat 11 is flush with the lower end face of the outer ring seat 12, and the two are integrally formed into the base 1.

[0047] It should be noted that the force-sensitive chip 42 in this embodiment belongs to the prior art. The force-sensitive chip 42 includes a silicon substrate and a borosilicate glass force-receiving block covered on the silicon substrate. Since the thermal expansion coefficients of the silicon substrate and the borosilicate glass force-receiving block are similar, the force-sensitive chip 42 minimizes the change in thermal expansion coefficient caused by temperature rise, improves the operating temperature of the EMB sensor, and enables accurate pressure measurement at high temperatures.

[0048] Note that the above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and may include many other equivalent embodiments without departing from the concept of the present invention. The scope of the present invention is determined by the scope of the appended claims.

Claims

1. A PCB side-mounted EMB sensor, characterized by, include: The base includes a pressure seat and an outer ring seat disposed outside the pressure seat. The upper end face of the pressure seat is provided with a hydraulic groove. The pressure seat is also provided with a mounting hole that runs through the axis and communicates with the hydraulic groove. The lower end face of the outer ring seat is provided with a placement groove. A sealing diaphragm is fixed on the pressure seat and forms a hydraulic cavity with the hydraulic groove, the hydraulic cavity being filled with hydraulic medium; The force-bearing block is fixed on the sealing diaphragm; The core includes a mounting post and a force-sensitive chip. The mounting post is disposed in the mounting hole, and the force-sensitive chip is disposed at one end of the mounting post and is used to detect the pressure of the hydraulic medium in the hydraulic chamber. The PCB is fixed inside the placement slot; The first conductive line has one end connected to the PCB and the other end extending out of the outer ring seat.

2. The PCB side-mounted EMB sensor according to claim 1, characterized in that, The pressure seat is an annular pressure seat, the hydraulic groove is an annular pressure groove, the sealing diaphragm is an annular diaphragm, and the PCB-side EMB sensor also includes an inner pressure ring, which is fixed on the annular diaphragm and spaced apart from the force-bearing block.

3. The PCB side-mounted EMB sensor according to claim 2, characterized in that, The force-bearing block is an annular plate, the inner diameter of which is larger than the inner diameter of the annular groove, and the outer diameter of which is smaller than the outer diameter of the annular groove.

4. The PCB side-mounted EMB sensor according to claim 1, characterized in that, The lower end face of the base is provided with a countersunk hole. The PCB-side EMB sensor also includes a protective plate spaced apart from the PCB. The protective plate is fixed in the countersunk hole and the lower end face of the protective plate is higher than the lower end face of the base.

5. The PCB side-mounted EMB sensor according to claim 4, characterized in that, The protective plate has a through hole, through which the first conductive wire extends out of the protective plate.

6. The PCB side-mounted EMB sensor according to claim 1, characterized in that, The base is provided with a liquid injection hole, one end of which is connected to the hydraulic chamber, and the other end is provided with a seal.

7. The PCB-under sensor of claim 1, wherein, The PCB-side EMB sensor also includes a second conductive line, one end of which is electrically connected to the metal PAD of the force-sensitive chip, and the other end extends out of the mounting post.

8. The PCB side-mounted EMB sensor according to claim 1, characterized in that, The base is a metal seat, the sealing diaphragm is a metal sheet, and the metal sheet is welded onto the metal seat.

9. The PCB-side-mounted EMB sensor according to claim 1, characterized in that, The lower end face of the pressure seat is flush with the lower end face of the outer ring seat, and the two are integrally formed into the base.

10. The PCB-under sensor of claim 1, wherein, The hydraulic medium in the hydraulic chamber is silicone oil or water.

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