Connecting Component and Sensor Using the Connecting Component

Abstract

The present invention discloses a connection component and a sensor using the connection component. The connection component and the sensor using the connection component include a base, a compression ring and a gasket respectively disposed on both sides of a ceramic plate. A base cavity is provided on the lower end surface of the base, and a base through hole communicating with the base cavity is provided on the upper end surface of the base. The ceramic plate is assembled in the base cavity, and the gasket is disposed between the bottom surface of the base cavity and the ceramic plate. The compression ring is assembled on the side surface of the ceramic plate facing away from the gasket. The material of the gasket is an elastic material. A gasket through hole with a diameter equal to that of the base through hole is provided in the middle of the gasket. A compression ring through hole with a diameter not greater than that of the gasket through hole is provided in the middle of the compression ring. The outer peripheral dimension of the compression ring is equal to the outer peripheral dimension of the ceramic plate. For the above connection component, by respectively providing a compression ring and a gasket on both sides of the ceramic plate and providing a compression ring with a smaller size to reduce the welding requirements, so as to avoid a large amount of heat conduction to the sensing device, the reliability of the fixed installation of the ceramic plate is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of sensors, and particularly to a connection component and a sensor using the connection component. Background Art

[0002] In order to achieve the conduction of minute deformations, an oil cavity is provided between the diaphragm and the sensing device in the sensor. The deformation of the diaphragm is conducted to the sensing device through the oil cavity, so that the sensing device senses the deformation and generates a sensing signal. Then, a sensor device is provided to sense the vibration deformation of the diaphragm. In the prior art methods, a ceramic plate is pressed and fixed in a base by a compression ring, and the compression ring and the base are fixedly connected by welding; however, in the prior art, the compression ring needs to be welded at a relatively high temperature, and the welding depth needs to meet certain requirements to ensure the sealing performance of the oil cavity. However, too high welding temperature easily conducts heat from the weld seam to the sensing device inside the sensor during the welding process, causing the internal materials to melt and cool and shrink, and then resulting in the sensing device being unable to sensitively sense the vibration deformation, which affects the yield rate of the produced sensors. Therefore, the sensor structure in the prior art has the problem that the ceramic plate is easily damaged and fails during fixed installation. Summary of the Invention

[0003] A connection component and a sensor using the connection component provided by the present invention aim to solve the problem that the sensor structure in the prior art is easily damaged and fails during the fixed installation of the ceramic plate.

[0004] In a first aspect, the present invention discloses a connection component, which includes a base, compression rings and gaskets respectively arranged on both sides of a ceramic plate; a base cavity is provided on the lower end surface of the base, and a base through hole communicating with the base cavity is provided on the upper end surface of the base; the ceramic plate is assembled in the base cavity, and the gasket is arranged between the bottom surface of the base cavity and the ceramic plate; the compression ring is assembled on the side surface of the ceramic plate facing away from the gasket; the gasket is made of an elastic material; a gasket through hole is provided in the middle of the gasket, and the aperture of the gasket through hole is equal to the aperture of the base through hole; a compression ring through hole is provided in the middle of the compression ring, and the aperture of the compression ring through hole is not larger than the aperture of the gasket through hole; the outer peripheral dimension of the compression ring is equal to the outer peripheral dimension of the ceramic plate; the compression ring is assembled in the base cavity and is fixedly connected with the base cavity by welding; the compression ring and the base are both made of aluminum or aluminum alloy.

[0005] For the connection component described above, the gasket is an annular gasket, the ceramic plate is an annular ceramic plate, and the compression ring is an annular compression ring; the outer diameter of the annular ceramic plate is larger than the outer diameter of the annular gasket; the diameter of the annular compression ring is 1 / 4 - 1 / 2 of the diameter of the base.

[0006] The connecting component described above, wherein the ceramic plate is a rectangular ceramic plate, and the pressing ring is a rectangular pressing ring; the length of the short side of the rectangular ceramic plate is greater than the outer diameter of the annular gasket; the length of the long side of the rectangular pressing ring is 1 / 4 - 1 / 2 of the diameter of the base.

[0007] The connecting component described above, wherein the thickness of the pressing ring is 0.2 - 0.45 times the depth of the concave cavity of the base.

[0008] The connecting component described above, wherein the cross-sectional width of the annular gasket is 1.6 - 4 times the thickness of the annular gasket.

[0009] The connecting component described above, wherein a side groove is provided on one side of the concave cavity of the base;

[0010] A pressing ring protrusion adapted to the side groove is provided on the pressing ring, and a ceramic plate protrusion adapted to the side groove is provided on the ceramic plate.

[0011] In a second aspect, the present invention discloses a sensor, wherein the sensor includes the connecting component described in the first aspect, and the sensor further includes a diaphragm;

[0012] An L-shaped concave platform is provided on the outer side wall of the base, a connecting ring is provided on the outer side wall of the diaphragm, and the height of the connecting ring extending towards the L-shaped concave platform is greater than the depth of the L-shaped concave platform;

[0013] The connecting ring is assembled on the L-shaped concave platform so that the connecting ring is fixedly connected to the base; when the connecting ring is assembled on the L-shaped concave platform, there is a gap between the diaphragm and the upper end surface of the base; the gap is communicated with the through hole of the base to form a T-shaped oil cavity, and oil is injected into the T-shaped oil cavity;

[0014] A ceramic plate through hole communicated with the through hole of the base is provided on the ceramic plate; a sealing metal ball is provided at the opening of the ceramic plate through hole.

[0015] The sensor described above, wherein a diaphragm convex ring is further provided on the outer side wall of the diaphragm, the extending direction of the diaphragm convex ring is opposite to the extending direction of the connecting ring, and the height of the diaphragm convex ring is less than the height of the connecting ring.

[0016] The sensor described above, wherein a base flange is further provided on the outer side wall of the base.

[0017] The sensor described above, wherein one side of the base flange is vertically cut to form a clearance side; the clearance side and the side groove of the concave cavity of the base are arranged on the same side.

[0018] A connection component and a sensor using the connection component disclosed by the present invention. The connection component includes a base, a pressure ring and a gasket respectively arranged on both sides of a ceramic plate; a base cavity is provided on the lower end surface of the base, and a base through hole communicating with the base cavity is provided on the upper end surface of the base; the ceramic plate is assembled in the base cavity, and the gasket is arranged between the bottom surface of the base cavity and the ceramic plate; the pressure ring is assembled on the side surface of the ceramic plate facing away from the gasket; the material of the gasket is an elastic material; a gasket through hole is provided in the middle of the gasket, and the aperture of the gasket through hole is equal to the aperture of the base through hole; a pressure ring through hole is provided in the middle of the pressure ring, and the aperture of the pressure ring through hole is not larger than the aperture of the gasket through hole; the outer peripheral dimension of the pressure ring is equal to the outer peripheral dimension of the ceramic plate; the pressure ring is assembled in the base cavity and is fixedly connected with the base cavity by welding; the materials of the pressure ring and the base are both aluminum or aluminum alloy. For the above connection component, by respectively arranging a pressure ring and a gasket on both sides of the ceramic plate and arranging a pressure ring with a smaller size to reduce the welding requirements, the heat of welding is prevented from being conducted to the sensing device in large quantities, thereby improving the reliability of fixedly installing the ceramic plate through the connection component. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0020] Figure 1 The overall structure diagram of the sensor provided by the embodiment of the present invention;

[0021] Figure 2 Another overall structure diagram of the sensor provided by the embodiment of the present invention;

[0022] Figure 3 The sectional structure diagram of the sensor provided by the embodiment of the present invention;

[0023] Figure 4 The internal structure diagram of the sensor provided by the embodiment of the present invention;

[0024] Figure 5 The exploded structure diagram of the sensor provided by the embodiment of the present invention;

[0025] Figure 6 Another internal structure diagram of the sensor provided by the embodiment of the present invention;

[0026] Figure 7 Another internal structure diagram of the sensor provided by the embodiment of the present invention;

[0027] Reference numerals in the drawings: 4, compression ring; 1, base; 2, ceramic plate; 12, base cavity; 13, base through-hole; 121, side groove; 41, compression ring protrusion; 22, ceramic plate protrusion; 3, diaphragm; 31, connecting ring; 32, T-shaped oil cavity; 23, ceramic plate through-hole; 33, diaphragm convex ring; 14, base flange; 15, clearance side; 5, gasket; 42, compression ring through-hole; 51, gasket through-hole. Detailed implementation manners

[0028] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0029] It should be understood that when used in this specification and the appended claims, the terms "comprises" and "comprising" indicate the presence of the described features, wholes, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, wholes, steps, operations, elements, components, and / or their combinations.

[0030] It should also be understood that the terms used in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. As used in the specification of the present invention and the appended claims, unless the context clearly indicates otherwise, the singular forms "a", "an" and "the" are intended to include the plural forms.

[0031] It should be further understood that the term "and / or" used in the specification of the present invention and the appended claims refers to any combination and all possible combinations of one or more of the associated listed items, and includes these combinations.

[0032] The above are only the specific implementation manners of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention can easily think of various equivalent modifications or substitutions, and these modifications or substitutions should all be covered by the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

[0033] The present invention discloses a connection component, such as Figure 3 and Figure 5As shown in the figure, the connecting component includes a base 1, a pressure ring 4 and a gasket 5 which are respectively arranged on both sides of the ceramic plate 2; a base cavity 12 is provided on the lower end surface of the base 1, and a base through hole 13 communicating with the base cavity 12 is provided on the upper end surface of the base 1; the ceramic plate 2 is assembled in the base cavity 12, and the gasket 5 is arranged between the bottom surface of the base cavity 12 and the ceramic plate 2; the pressure ring 4 is assembled on the side surface of the ceramic plate 2 facing away from the gasket 5; the gasket 5 is made of an elastic material; a gasket through hole 51 is provided in the middle of the gasket 5, and the aperture of the gasket through hole 51 is equal to the aperture of the base through hole 13; a pressure ring through hole 42 is provided in the middle of the pressure ring 4, and the aperture of the pressure ring through hole 42 is not larger than the aperture of the gasket through hole 51; the outer peripheral dimension of the pressure ring 4 is equal to the outer peripheral dimension of the ceramic plate 2; the pressure ring 4 is assembled in the base cavity 12 and is fixedly connected with the base cavity 12 by welding; the pressure ring 4 and the base 1 are both made of aluminum or aluminum alloy.

[0034] Specifically, in order to fixedly connect the ceramic plate 2 with the bottom surface of the base cavity 12, a gasket 5 can be arranged on one end surface of the ceramic plate 2 facing the base cavity 12, and a pressure ring 4 can be arranged on one end surface of the ceramic plate 2 facing away from the base cavity 12. The ceramic plate 2 is tightly pressed on the gasket 5 by the pressure ring 4; the gasket 5 is made of an elastic material (for example, the gasket 5 can be set as a rubber gasket 5), then elastic deformation occurs on both sides of the gasket 5 after being squeezed, and the gap between the ceramic plate 2 and the bottom surface of the base cavity 12 is sealed, thus forming a seal; the ceramic plate 2 and the gasket 5 are tightly pressed by the pressing force provided by the pressure ring 4, so as to improve the stability of the fixed assembly of the ceramic plate 2.

[0035] A sensing chip and connection leads are provided on the ceramic plate 2, and the sensing chip and connection leads can be used as sensor components arranged on the ceramic plate 2 to sense vibration deformation. In order to improve the stability of the fixed connection between the pressure ring 4 and the base 1, after the pressure ring 4 is assembled, the pressure ring 4 can be fixedly welded to the inner side wall of the base cavity 12 by welding; a pressing force can be applied to the pressure ring 4 during the welding process to perform welding treatment on the pressure ring 4 while tightly pressing the gasket 5, such as the pressing force applied to the pressure ring 4 is 3 - 10 kg. Specifically, since the base 1 is made of aluminum or aluminum alloy, and the pressure ring 4 is also made of aluminum or aluminum alloy, laser melting welding can be used for welding the pressure ring 4 and the base 1, and the welding temperature is 700 - 1000 °C. Compared with the technical method of welding stainless steel (the stainless steel welding temperature is above 1400 °C), using aluminum or aluminum alloy to manufacture the pressure ring 4 and the base 1 can greatly reduce the welding temperature, avoid excessive temperature conduction to the ceramic plate 2 side and damage the sensor components on the ceramic plate 2, that is, it can improve the yield rate of sensor production. The pressure ring through hole 42 is used for the lead to pass through.

[0036] Moreover, due to the provision of the gasket 5 and the pressing ring 4 with a smaller size, when welding the pressing ring 4, there is no need to consider the sealing performance between the pressing ring 4 and the inner side wall of the base cavity 12. Therefore, compared with the traditional technical method, in the technical method adopted in this application, the welding depth only needs to reach 0.3 mm, and the power of laser welding is 1000 W. In the traditional technical method, it is necessary to perform sealed welding on the pressing ring 4, and the welding depth must reach more than 1.2 mm to meet the usage requirements, and the corresponding laser welding power is 3000 W. Compared with the traditional technical method, the welding conditions required for the connection component adopted in this application are greatly reduced, the process complexity of the welding process is significantly reduced, the energy consumption of welding during the processing is reduced, and energy conservation and emission reduction are achieved. At the same time, due to the smaller welding depth, it is not easy to conduct the heat during the welding process to the side of the ceramic plate 2, that is, it can avoid a large amount of welding heat being conducted to the induction device and damaging the sensor device, improving the reliability of fixedly installing the ceramic plate 2 through the connection component, improving the performance of the sensor, and simultaneously improving the yield rate of sensor production.

[0037] In a more specific embodiment, the gasket 5 is an annular gasket 5, the ceramic plate 2 is an annular ceramic plate 2, and the pressing ring 4 is an annular pressing ring 4; the outer diameter of the annular ceramic plate 2 is larger than the outer diameter of the annular gasket 5; the diameter of the annular pressing ring 4 is 1 / 4 - 1 / 2 of the diameter of the base 1.

[0038] In a more specific embodiment, the gasket 5 can be set as an annular gasket 5, the ceramic plate 2 can be set as an annular ceramic plate 2, and the pressing ring 4 can be set as an annular pressing ring 4. Then, the base cavity 12 is correspondingly set as a circular cavity, and the outer diameter of the annular pressing ring 4 is equal to the outer diameter of the annular ceramic plate 2. The specific structure is as Figure 6 and Figure 7 shown. Among them, the outer diameter of the annular ceramic plate 2 can be set to be larger than the outer diameter of the annular gasket 5 to improve the reliability of the annular gasket 5 in sealing the bottom surface of the annular ceramic plate 2 and the base cavity 12. Further, to reduce the overall size of the annular pressing ring 4, the diameter of the annular pressing ring 4 can be set to be 1 / 4 - 1 / 2 of the outer diameter of the periphery of the base 1.

[0039] In another specific embodiment, the gasket 5 is an annular gasket 5, the ceramic plate 2 is a rectangular ceramic plate 2, and the pressing ring 4 is a rectangular pressing ring 4; the length of the short side of the rectangular ceramic plate 2 is larger than the outer diameter of the annular gasket 5; the length of the long side of the rectangular pressing ring 4 is 1 / 4 - 1 / 2 of the diameter of the base 1.

[0040] In a more specific embodiment, the gasket 5 can also be set as an annular gasket 5, the ceramic plate 2 can be set as a rectangular ceramic plate 2, and the pressure ring 4 can be set as a rectangular pressure ring 4. Correspondingly, the base cavity 12 is set as a rectangular cavity; the length and width of the rectangular pressure ring 4 are both equal to the length and width of the annular ceramic plate 2. The specific structure is as Figures 2 to 5 shown. For example, in the embodiment of the present application, the ceramic plate 2 and the pressure ring 4 are set as rectangles. Among them, the length of the short side of the rectangular ceramic plate 2 can be set to be greater than the outer diameter of the annular gasket 5 to improve the reliability of the annular gasket 5 to seal the annular ceramic plate 2 and the bottom surface of the base cavity 12. Further, to reduce the overall size of the annular pressure ring 4, the length of the long side of the rectangular pressure ring 4 can be set to be 1 / 4 - 1 / 2 of the outer diameter of the periphery of the base 1.

[0041] In a more specific embodiment, the thickness of the pressure ring 4 is 0.2 - 0.45 times the depth of the base cavity 12. Specifically, the cross-sectional width of the annular gasket 5 is 1.6 - 4 times the thickness of the annular gasket 5.

[0042] Further, to ensure that the thickness of the annular pressure ring 4 meets the welding requirements, the thickness of the pressure ring 4 can be set to be 0.2 - 0.45 times the depth of the base cavity 12. For example, the depth of the base cavity 12 is usually more than 1.5 mm, then the corresponding thickness of the pressure ring 4 is at least 0.3 mm. Preferably, the thickness of the pressure ring 4 is 0.35 - 5 mm. Further, to improve the sealing performance of the annular gasket 5, the cross-section of the annular gasket 5 can be set as a rectangle, and the cross-sectional width of the annular gasket 5 can be set to be 1.6 - 4 times the thickness of the annular gasket 5 to ensure that the annular gasket 5 has enough width to achieve a tight seal.

[0043] In a more specific embodiment, a side groove 121 is provided on one side of the base cavity 12; a pressure ring protrusion 41 adapted to the side groove 121 is provided on the pressure ring 4, and a ceramic plate protrusion 22 adapted to the side groove 121 is provided on the ceramic plate 2.

[0044] When assembling the ceramic plate 2 and the pressure ring 4 on the base 1, to improve the tightness of the assembly, a side groove 121 can be provided on one side of the base cavity 12. The specific setting structure is as Figure 6 shown; a pressure ring protrusion 41 is provided on the pressure ring 4 and a ceramic plate protrusion 22 is provided on the ceramic plate 2. The specific setting structure is as Figure 7As shown in the figure. This setting structure can enable the pressure ring 4 and the ceramic plate 2 to be assembled more tightly and stably within the base 1, preventing the pressure ring 4 and the ceramic plate 2 from rotating and shifting during the bonding and fixing process. Moreover, when assembling the pressure ring 4 and the ceramic plate 2, the positioning of the ceramic plate 2 can be achieved through the adaptation of the pressure ring protrusion 41 and the ceramic plate protrusion 22 to the side groove 121. That is, the ceramic plate 2 is rotated to a suitable orientation and assembled within the base 1. In this way, each ceramic plate 2 can be rotated to the same angle and assembled within the base 1, improving the consistency of the orientations of the various sensing components (including the sensing chip and the connection leads) on the ceramic plate 2. Thus, by obtaining the orientations of different sensing components (especially the connection leads), the types of the components on the ceramic plate 2 can be quickly distinguished, improving the efficiency and accuracy of the fixed connection of the ceramic plate 2 by the pressure ring 4 and the gasket 5.

[0045] An embodiment of the present invention also discloses a sensor, as Figures 1 to 7 shown. The sensor includes the connection component as described in the above embodiment. The sensor further includes a diaphragm 3. An L-shaped concave platform is provided on the outer sidewall of the base 1. A connection ring 31 is provided on the outer sidewall of the diaphragm 3. The height of the connection ring 31 extending towards the L-shaped concave platform is greater than the depth of the L-shaped concave platform. The connection ring 31 is assembled on the L-shaped concave platform so that the connection ring 31 is fixedly connected to the base 1. When the connection ring 31 is assembled on the L-shaped concave platform, there is a gap between the diaphragm 3 and the upper end surface of the base 1. The gap communicates with the base through-hole 13 to form a T-shaped oil cavity 32, and oil is injected into the T-shaped oil cavity 32. A ceramic plate through-hole 23 communicating with the base through-hole 13 is provided on the ceramic plate 2. A sealing metal ball (not shown in the figure) is provided at the opening of the ceramic plate through-hole 23. The metal ball is sealed at the opening of the ceramic plate through-hole 23 by melting the metal ball through methods such as resistance welding or laser welding. Among them, the metal ball can be a tin ball or a metal ball made of other metals that are solid at room temperature.

[0046] By pressing the connection ring 31 onto the base 1, the inner sidewall of the connection ring 31 abuts against the L-shaped concave platform, and the connection ring 31 and the base 1 can be fixedly welded by welding. The opening of the ceramic plate through-hole 23 is sealed by the sealing metal ball, thereby sealing the T-shaped oil cavity 32, and oil is injected into the T-shaped oil cavity 32. Among them, the connection ring 31 and the diaphragm 3 can be manufactured by integral molding, and the connection ring 31 and the diaphragm 3 can be made of aluminum alloy material. The gasket 5 is assembled in the base cavity 12, then the ceramic plate 2 is assembled below the gasket 5, and the pressure ring 4 is assembled below the ceramic plate 2 and the pressure ring 4 is tightly welded to the inner sidewall of the base cavity 12 by welding, thus obtaining a complete sensor.

[0047] In a more specific embodiment, a diaphragm convex ring 33 is further provided on the outer sidewall of the diaphragm 3. The extending direction of the diaphragm convex ring 33 is opposite to that of the connecting ring 31, and the height of the diaphragm convex ring 33 is less than the height of the connecting ring 31.

[0048] To improve the tensile resistance of the diaphragm 3, a diaphragm convex ring 33 can be provided on the outer end face of the diaphragm 3. The extending direction of the diaphragm convex ring 33 is opposite to that of the connecting ring 31. The specific structure is as Figures 1 to 3 shown. Among them, the inner diameter of the diaphragm convex ring 33 can be set to be equal to the inner diameter of the connecting ring 31, and the outer diameter of the diaphragm convex ring 33 can be set to be equal to the outer diameter of the connecting ring 31. Since the diaphragm convex ring 33 does not need to be correspondingly set according to the depth of the L-shaped concave table, the height of the diaphragm convex ring 33 can be set to be less than the height of the connecting ring 31. The connecting ring 31, the diaphragm 3 and the diaphragm convex ring 33 can be obtained by integrally molding.

[0049] In a specific embodiment, the height of the diaphragm convex ring 33 can be set to be 0.12 - 0.4 times the height of the connecting ring 31.

[0050] Specifically, a base flange 14 is further provided on the outer sidewall of the base 1. One side of the base flange 14 is vertically cut to form a clearance side 15; the clearance side 15 and the side groove 121 of the base cavity 12 are arranged on the same side.

[0051] Specifically, to improve the stability of sensor assembly, a base flange 14 can be provided on the outer sidewall of the base 1. The base flange 14 is flush with the bottom surface of the base 1. The specific setting structure is as Figure 1 and Figure 5 shown. Further, to improve the accuracy of positioning the connecting leads on the ceramic plate 2 in the sensor, a clearance side 15 can be provided on one side of the base flange 14. The specific setting structure of the clearance side 15 is as Figure 5 shown. The clearance side 15 and the side groove 121 of the base cavity 12 are arranged on the same side, that is, the protruding direction of the side groove 121 is directly opposite to the clearance side 15. Then, the position of the clearance side 15 can be used to accurately determine the orientation of the side groove 121.

[0052] A connection component and a sensor using the connection component disclosed by the present invention. The connection component includes a base, a pressure ring and a gasket respectively disposed on both sides of a ceramic plate; a base cavity is provided on the lower end surface of the base, and a base through hole communicating with the base cavity is provided on the upper end surface of the base; the ceramic plate is assembled in the base cavity, and the gasket is disposed between the bottom surface of the base cavity and the ceramic plate; the pressure ring is assembled on the side surface of the ceramic plate facing away from the gasket; the gasket is made of an elastic material; a gasket through hole is provided in the middle of the gasket, and the aperture of the gasket through hole is equal to the aperture of the base through hole; a pressure ring through hole is provided in the middle of the pressure ring, and the aperture of the pressure ring through hole is not larger than the aperture of the gasket through hole; the outer peripheral dimension of the pressure ring is equal to the outer peripheral dimension of the ceramic plate; the pressure ring is assembled in the base cavity and fixedly connected to the base cavity by welding; the materials of the pressure ring and the base are both aluminum or aluminum alloy. For the above connection component, by respectively providing a pressure ring and a gasket on both sides of the ceramic plate and providing a pressure ring with a smaller size to reduce the welding requirements, a large amount of heat generated by welding is prevented from being conducted to the sensing device, thereby improving the reliability of fixedly installing the ceramic plate through the connection component.

[0053] As described above, the above is only the specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present application can easily think of various equivalent modifications or substitutions, and these modifications or substitutions should all be covered within the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A connection assembly, characterized in that: The connecting assembly comprises a base, a pressure ring and a gasket respectively arranged on both sides of the ceramic plate; The lower end surface of the base is provided with a base cavity, and the upper end surface of the base is provided with a base through hole that penetrates the base cavity; The ceramic plate is installed in the base cavity, and the gasket is arranged between the bottom surface of the base cavity and the ceramic plate; the pressure ring is installed on a side of the ceramic plate away from the gasket; The material of the gasket is elastic material; a gasket through hole is provided in the middle of the gasket, and the aperture of the gasket through hole is equal to the aperture of the base through hole; a pressure ring through hole is provided in the middle of the pressure ring, and the aperture of the pressure ring through hole is not larger than the aperture of the gasket through hole; the outer peripheral size of the pressure ring is equal to the outer peripheral size of the ceramic plate; the pressure ring is assembled in the base concave cavity and is fixedly connected to the base concave cavity by welding; The materials of the pressure ring and the base are both aluminum or aluminum alloy; the welding temperature between the pressure ring and the base is 700-1000° C.; the welding depth between the pressure ring and the inner side wall of the base cavity is less than 1.2 mm.

2. The connection assembly according to claim 1, characterized in that: The gasket is an annular gasket, the ceramic plate is an annular ceramic plate, and the pressure ring is an annular pressure ring; the outer diameter of the annular ceramic plate is larger than the outer diameter of the annular gasket; the diameter of the annular pressure ring is 1 / 4-1 / 2 of the diameter of the base.

3. The connection assembly according to claim 2, characterized in that: The gasket is an annular gasket, the ceramic plate is a rectangular ceramic plate, and the pressure ring is a rectangular pressure ring; the short side length of the rectangular ceramic plate is greater than the outer diameter of the annular gasket; the long side length of the rectangular pressure ring is 1 / 4-1 / 2 of the base diameter.

4. The connection assembly according to claim 2 or 3, characterized in that: The thickness of the pressure ring is 0.2-0.45 times the depth of the base cavity.

5. The connection assembly according to claim 4, characterized in that: The cross-sectional width of the annular gasket is 1.6-4 times the thickness of the annular gasket.

6. The connection assembly according to claim 2, characterized in that: A side groove is provided on one side of the base cavity; The pressure ring is provided with a pressure ring protrusion matched with the side groove, and the ceramic plate is provided with a ceramic plate protrusion matched with the side groove.

7. A sensor, characterized in that: The sensor comprises the connection assembly according to any one of claims 1 to 6, and the sensor further comprises a diaphragm; An L-shaped concave platform is provided on the outer side wall of the base, and a connecting ring is provided on the outer side wall of the diaphragm, and the height of the connecting ring extending toward the L-shaped concave platform is greater than the depth of the L-shaped concave platform; The connecting ring is assembled on the L-shaped recessed platform so that the connecting ring is fixedly connected to the base; when the connecting ring is assembled on the L-shaped recessed platform, a gap is formed between the diaphragm and the upper end surface of the base; the gap is connected with the through hole of the base to form a T-shaped oil cavity, and oil is injected into the T-shaped oil cavity; The ceramic plate is provided with a ceramic plate through hole which is connected with the base through hole; and a sealing metal ball is provided at the opening of the ceramic plate through hole.

8. The sensor according to claim 7, characterized in that The outer side wall of the diaphragm is further provided with a diaphragm convex ring, the extension direction of the diaphragm convex ring is opposite to the extension direction of the connecting ring, and the height of the diaphragm convex ring is smaller than the height of the connecting ring.

9. The sensor according to claim 7, characterized in that The outer side wall of the base is also provided with a base flange.

10. The sensor according to claim 9, characterized in that One side of the base flange is vertically cut to form a side edge to avoid air; the side edge to avoid air and the side groove of the base cavity are arranged on the same side.

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