CN114878029A - Pressure transmitter and mechanical equipment - Google Patents
Pressure transmitter and mechanical equipment Download PDFInfo
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- CN114878029A CN114878029A CN202210410416.5A CN202210410416A CN114878029A CN 114878029 A CN114878029 A CN 114878029A CN 202210410416 A CN202210410416 A CN 202210410416A CN 114878029 A CN114878029 A CN 114878029A
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- electrical connection
- pressure transmitter
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- 239000000758 substrate Substances 0.000 claims description 30
- 238000007789 sealing Methods 0.000 claims description 17
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- 230000003750 conditioning effect Effects 0.000 description 7
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- 239000000919 ceramic Substances 0.000 description 4
- 230000003321 amplification Effects 0.000 description 2
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- 230000007547 defect Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
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- 230000007613 environmental effect Effects 0.000 description 1
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L1/00—Measuring force or stress, in general
- G01L1/005—Measuring force or stress, in general by electrical means and not provided for in G01L1/06 - G01L1/22
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L19/00—Details of, or accessories for, apparatus for measuring steady or quasi-steady pressure of a fluent medium insofar as such details or accessories are not special to particular types of pressure gauges
- G01L19/0061—Electrical connection means
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L9/00—Measuring steady of quasi-steady pressure of fluid or fluent solid material by electric or magnetic pressure-sensitive elements; Transmitting or indicating the displacement of mechanical pressure-sensitive elements, used to measure the steady or quasi-steady pressure of a fluid or fluent solid material, by electric or magnetic means
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measuring Fluid Pressure (AREA)
Abstract
The invention relates to a pressure transmitter and mechanical equipment, wherein the pressure transmitter is arranged on the mechanical equipment and comprises a shell, a pressure sensing assembly and an electrical connection assembly, wherein the shell is provided with an inner cavity communicated with two opposite ends along the axial direction; the pressure sensing assembly is arranged in the inner cavity; the electric connecting component is provided with a connecting part and an adapter part which are connected with each other along the axial direction, and the connecting part is at least partially inserted into the inner cavity; the electric connecting component comprises an elastic thimble arranged on the connecting part, and the elastic thimble is abutted against the pressure sensing component so that the electric connecting component is electrically connected with the pressure sensing component; the elastic ejector pin is configured to provide an elastic force in a direction from the connecting part to the switching part so that the connecting part abuts against one end, close to the electrical connection assembly, of the shell. The pressure transmitter is assembled without manual welding, the electrical connection assembly can be firmly abutted to the pressure sensing assembly, loosening cannot occur, and uncertainty of the pressure transmitter in the using process is reduced.
Description
Technical Field
The invention relates to the technical field of pressure detection, in particular to a pressure transmitter and mechanical equipment.
Background
In the field of automatic measurement and control, a pressure transmitter is often used to measure the pressure of a liquid or gaseous medium. The pressure transmitter is an electronic device capable of detecting medium pressure, and the working principle of the pressure transmitter is that the medium pressure directly acts on a pressure core body in the pressure transmitter, and the pressure core body converts the sensed medium pressure into an electric signal and then transmits the electric signal to an external display control device. Therefore, the device meets the requirements of information transmission, processing, storage, display, recording, control and the like, and is a key precise detection device of a control system.
Existing pressure transmitters have evolved from mechanical quantity sensors to MEMS (Micro-Electro-Me-mechanical systems) pressure transmitters. However, most of pressure cores in the existing MEMS pressure transmitter adopt a ceramic structure, and the pressure core adopting the ceramic structure has many defects, and particularly, the pressure core adopting the ceramic structure has a large volume and a complex structure, so that the pressure transmitter has low measurement sensitivity, high manufacturing cost, and limitation on application occasions with requirements on a spatial structure and sensitivity. And ceramic construction's pressure core and pressure transmitter's signal amplification circuit need be connected through manual welding mode, if welding misoperation still leads to the damage of pressure core and amplification circuit easily, and then has influenced pressure transmitter reliability in the use, and above-mentioned defect has restricted pressure transmitter's application scope and practicality to a certain extent.
Disclosure of Invention
In view of the above, it is necessary to provide a pressure transmitter and a mechanical device including the same, which are compact in size, secure and reliable, and do not need to be connected by welding between the pressure core and the amplifying circuit, in order to solve the problems of the existing pressure transmitter, such as large volume of the pressure core, complicated structure, and instability of the pressure core and the amplifying circuit due to welding.
According to one aspect of the present application, there is provided a pressure transmitter comprising:
the shell is provided with an inner cavity communicated with two opposite ends of the shell along the axial direction;
the pressure sensing assembly is arranged in the inner cavity; and
the electric connecting component is provided with a connecting part and an adapter part which are mutually connected along the axial direction, and the connecting part is inserted into the inner cavity;
the electrical connection assembly comprises an elastic thimble arranged on the connecting part, and the elastic thimble abuts against the pressure sensing assembly so that the electrical connection assembly is electrically connected with the pressure sensing assembly; the elastic thimble is configured to provide an elastic force along the axial direction and in a direction from the connecting part to the switching part, so that the connecting part is abutted against one end of the shell close to the electrical connection component.
In one embodiment, the connecting portion is engaged with the pressure sensing assembly.
In one embodiment, the pressure sensing assembly comprises:
the clamping sleeve is provided with an accommodating cavity, and the bottom wall of the accommodating cavity is provided with a through hole which penetrates through two opposite ends of the clamping sleeve along the axial direction;
the sealing ring is accommodated in the through hole; and
the sensing component is accommodated in the accommodating cavity, one side of the sensing component in the axial direction is pressed against the sealing ring, and the other side of the sensing component in the axial direction is abutted by the elastic thimble.
In one embodiment, at least two buckles are arranged on the outer periphery of the ferrule at intervals, at least two clamping grooves are correspondingly formed in the connecting portion of the electrical connection assembly, each clamping groove penetrates through the inner side wall and the outer side wall of the connecting portion, and each buckle is partially clamped in one clamping groove.
In one embodiment, the outer periphery of the ferrule is provided with a limiting block, the electrical connection assembly is correspondingly provided with a limiting groove on the end surface of the connection portion, and the limiting block is limited in the limiting groove.
In one embodiment, the sensing component comprises a substrate and a MEMS core, the MEMS core is disposed on one side of the substrate close to the sealing ring and is accommodated in the through hole, and the MEMS core is electrically connected to the substrate through a connecting wire.
In one embodiment, the housing has a bead surrounding the electrical connection assembly around the axial direction, and the connecting portion abuts against the bead in the axial direction under an elastic force provided by the elastic ejector pin.
In one embodiment, the connecting portion has a clamping position, the clamping position is close to an opening at one end of the pressure sensing assembly, the elastic thimble portion is accommodated in the clamping position, one end of the elastic thimble penetrates through a bottom wall of the clamping position and extends into the switching portion, and the other end of the elastic thimble abuts against the pressure sensing assembly.
In one embodiment, the resilient thimble is compressed against the pressure sensing assembly to be resiliently deformed.
According to another aspect of the present application, there is provided a mechanical device comprising a pressure transmitter as described above.
Above-mentioned pressure transmitter sets up connecting portion and switching portion along axial interconnect at electrical connection subassembly through setting up pressure sensing component in the inner chamber of casing, sets up elasticity thimble simultaneously on the connecting portion on electrical connection subassembly. During assembly, the connecting part is partially inserted into the inner cavity of the shell, the elastic thimble arranged on the connecting part abuts against the pressure sensing assembly, the characteristic that the elastic thimble can be compressed and deformed is utilized, the elastic thimble provides elastic force in the direction pointing to the switching part from the connecting part, so that the connecting part abuts against one end, close to the electrical connection assembly, of the shell, the pressure sensing assembly and the electrical connection assembly cannot be loosened, the electrical connection assembly can firmly abut against the pressure sensing assembly, manual welding is not needed for assembly, the pressure transmitter is compact in structure, firm and reliable in electrical communication connection, and simple and convenient to assemble.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only one embodiment of the present invention, and for those skilled in the art, other embodiments can be obtained from the drawings without creative efforts.
FIG. 1 is a schematic perspective view of a pressure transmitter provided by an embodiment of the present invention;
FIG. 2 is a cross-sectional view of a pressure transmitter provided by an embodiment of the present invention;
FIG. 3 is an exploded schematic view of a pressure transmitter provided by an embodiment of the present invention;
FIG. 4 is an enlarged view of area A of FIG. 3;
fig. 5 is an enlarged schematic view of the region B in fig. 2.
Description of reference numerals:
10. a pressure transmitter;
100. a housing; 101. a threaded hole; 102. a vent hole; 103. an inner cavity; 104. curling;
200. a pressure sensing assembly; 210. a card sleeve; 211. an accommodating chamber; 212. a through hole; 213. buckling; 214. a limiting block; 220. a seal ring; 230. a sensing component; 231. a substrate; 232. a MEMS core;
300. an electrical connection assembly; 310. a socket; 311. a connecting portion; 3111. a first sub-connection portion; 3112. a second sub-connection portion; 3113. clamping and connecting; 3114. a card slot; 3115. a limiting groove; 312. a switching part; 320. an elastic thimble; 321. a first spring plate; 322. a second elastic sheet; 323. and a third elastic sheet.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "level," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless explicitly specified otherwise.
In the present invention, unless otherwise explicitly stated or limited, the terms "mounted," "connected," "fixed," and the like are to be construed broadly, e.g., as being permanently connected, detachably connected, or integral; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or obliquely above the second feature, or may simply mean that the first feature is at a higher level than the second feature. A first feature "under," "beneath," and "beneath" a second feature may be directly or obliquely under the first feature or may simply mean that the first feature is at a lesser level than the second feature.
It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "up," "down," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a single embodiment.
An embodiment of the invention provides a pressure transmitter and mechanical equipment, wherein the pressure transmitter is installed in the mechanical equipment and used for sensing the pressure of external gas or liquid medium, converting the pressure into an electric signal and transmitting the electric signal to external display control equipment, so that a user can detect and obtain the value of the medium pressure outside the mechanical equipment.
The structure of the pressure transmitter in the present application is described below, and the present embodiment is only used as an example and does not limit the technical scope of the present application. It is understood that in other embodiments, the mechanical device including the pressure transmitter may be any mechanical device that needs to detect the pressure of an external medium, including but not limited to, engineering machinery, environmental engineering, medical technology, fluid pressure monitoring, die casting, food industry, pharmaceutical, pneumatic control, hydraulic devices, etc., without limitation.
The following describes a preferred embodiment of the pressure transmitter provided by the present application with reference to fig. 1 to 5.
As shown in fig. 1-3, a pressure transmitter 10 for mounting in a machine for sensing the pressure of a medium passing into the machine, the pressure transmitter 10 includes a housing 100, a pressure sensing assembly 200, and an electrical connection assembly 300. The pressure sensing assembly 200 is disposed in the housing 100, and is configured to sense an external medium pressure, convert the sensed external medium pressure into a weak electrical signal, and amplify the weak electrical signal; the electrical connection assembly 300 is partially disposed in the housing 100 and electrically connected to the pressure sensing assembly 200, the electrical connection assembly 300 is connected to the pressure sensing assembly 200 in a snap-fit manner, meanwhile, the portion of the electrical connection assembly 300 disposed in the housing 100 is also supported by the housing 100 near one end of the electrical connection assembly 300, and the electrical connection assembly 300 is configured to output the amplified electrical signal to an external display control device.
In some embodiments, as shown in fig. 2 and 3, the housing 100 is a hollow tubular structure, and the housing 100 has a threaded hole 101, a vent hole 102 and an inner cavity 103 from bottom to top along an axial direction thereof. The threaded hole 101, the vent hole 102 and the inner cavity 103 are coaxially arranged, the vent hole 102 is communicated with the threaded hole 101 and the inner cavity 103, the threaded hole 101, the vent hole 102 and the inner cavity 103 jointly penetrate through two opposite ends of the shell 100 along the axial direction, and the diameter of the inner cavity 103 is larger than that of the threaded hole 101 and the vent hole 102. The threaded hole 101 is used for connecting a pipeline in mechanical equipment, the inner cavity 103 is used for accommodating the pressure sensing assembly 200 and a part of the electrical connection assembly 300, and the vent hole 102 is used for introducing gas or liquid in the pipeline into the inner cavity 103, so that the pressure sensing assembly 200 arranged in the inner cavity 103 can sense the pressure of gas or liquid medium.
In a preferred embodiment, as shown in fig. 1 and 2, one end of the casing 100 close to the electrical connection component 300 has a bead 104 that axially surrounds the electrical connection component 300, and the bead 104 is bent from the outer circumferential surface of the casing 100 in the radial direction of the casing 100 and extends toward the direction close to the central axis of the casing 100 and is formed by a riveting process. In other embodiments, the bead 104 may be formed by detachably sleeving a cover having an inner diameter smaller than that of the housing 100 on the end of the housing 100 near the electrical connection assembly 300. Through the design of the bead 104, the portion of the electrical connection assembly 300 inserted into the inner cavity 103 of the housing 100 can be abutted against the inner wall of the bead 104 along the axial direction of the housing 100, so that one end of the electrical connection assembly 300 can be firmly installed in the housing 100 without shaking.
In some embodiments, as shown in fig. 2 and 3, the pressure sensing assembly 200 includes a ferrule 210, a sealing ring 220, and a sensing component 230, the ferrule 210 is coaxially disposed on the bottom wall of the inner cavity 103 of the housing 100, and the sealing ring 220 and the sensing component 230 are coaxially received in the ferrule 210. The sealing ring 220 is used for sealing the ferrule 210, and preventing external media such as gas or liquid from penetrating into the inner cavity 103 of the housing 100, so that the media acting on the pressure sensing assembly 200 leaks, and the pressure test is inaccurate. The sensing part 230 is used for sensing the pressure of the external medium and converting and amplifying the pressure into an electric signal which can be output.
In an alternative embodiment, ferrule 210 is a ring-like structure. Specifically, the ferrule 210 has a receiving cavity 211, the inner surface of the ferrule 210 includes a bottom wall and a side wall extending from the edge of the bottom wall toward the axial direction, the bottom wall and the side wall are jointly configured to form the receiving cavity 211, and the bottom wall is opened with a through hole 212 passing through two opposite ends of the ferrule 210 along the axial direction. Preferably, the outer periphery of the ferrule 210 is protruded with two latches 213 at intervals for engaging with the electrical connection assembly 300, and the two latches 213 are symmetrically arranged along the radial direction of the housing 100 with a central plane passing through the central axis of the housing 100 as a symmetry plane. The pressure sensing assembly 200 and the electrical connection assembly 300 can be firmly connected together by arranging the buckle 213 to be clamped with the electrical connection assembly 300. Preferably, the outer periphery of the ferrule 210 is further protruded with a stopper 214, and the stopper 214 is retained in the electrical connection assembly 300 to further prevent the pressure sensing assembly 200 and the electrical connection assembly 300 from being displaced relatively.
The sealing ring 220 is an O-ring made of an elastic rubber material, and is accommodated in the through hole 212 and elastically deformed by being pressed. The sensing component 230 comprises a substrate 231 and an MEMS core 232, the MEMS core 232 is inversely installed on one side, close to the sealing ring 220, of the substrate 231 in a welding mode of patch reflow welding, one side, far away from the MEMS core 232, of the substrate 231 is pressed and abutted by the electrical connection assembly 300, and one side, welded with the MEMS core 232, of the substrate 231 is pressed and abutted by the sealing ring 220, so that the sealing ring 220 is compressed by 25% -30%, and the MEMS core 232 can be completely accommodated in the through hole 212 due to the fact that the size of the MEMS core 232 is small, and the pressure sensing component 200 is enabled to be free of space and to have a compact structure; an amplifying and conditioning circuit and four signal output ends are arranged on one side of the substrate 231, which is far away from the MEMS core 232, and the MEMS core 232 is electrically connected to the amplifying and conditioning circuit of the substrate 231 through a connecting wire.
So, gaseous or liquid medium can exert pressure to MEMS core 232 through air vent 102, and sealing washer 220 can play sealed effect betterly, makes MEMS core 232 bear the pressure that the medium was applyed completely to convert weak signal of telecommunication, the amplifying and conditioning circuit of rethread base plate 231 enlargies the signal of telecommunication, and exports to signal output part, exports electrical connection subassembly 300 at last, makes the user can finally learn the pressure value that is surveyed from external display device.
Further, the substrate 231 is further provided with a threading hole for the connecting wire to pass through. Specifically, one end of the connecting wire is connected to the MEMS core 232, and the other end of the connecting wire passes through the threading hole and is connected to the amplifying and conditioning circuit of the substrate 231, so that the connecting wire is not exposed to the sensing component 230, and the neatness and beauty of the wiring of the sensing component 230 are ensured.
Referring to fig. 2, in some embodiments, the electrical connection assembly 300 includes a socket 310 and an elastic pin 320, wherein the elastic pin 320 is disposed in the socket 310 for connecting the pressure sensing assembly 200, and outputting the pressure sensed by the pressure sensing assembly 200 and an electrical signal obtained by converting the pressure to an external display device. Specifically, the socket 310 is an integrally injection-molded tubular structure, and includes a connection portion 311 and an adapter portion 312 coaxially connected to the connection portion 311. The connecting portion 311 includes a first sub-connecting portion 3111 and a second sub-connecting portion 3112 coaxially connected to each other, an outer diameter of the first sub-connecting portion 3111 is smaller than an outer diameter of the second sub-connecting portion 3112 and smaller than an outer diameter of the adapter portion 312, one end of the first sub-connecting portion 3111 is connected to the adapter portion 312, and the other end of the first sub-connecting portion 3111 is connected to the second sub-connecting portion 3112. Thus, in the axial direction, the second sub-connection portion 3112 is close to one end of the first sub-connection portion 3111, and the adapter portion 312 is formed with a step at one end close to the first sub-connection portion 3111. The second sub-connecting portion 3112 is inserted into the inner cavity 103 of the housing 100, and a step formed at an end of the second sub-connecting portion 3112 close to the first sub-connecting portion 3111 abuts against an inner wall of the turned edge 104 of the housing 100, so that the electrical connection assembly 300 and the housing 100 can be firmly connected.
Further, as shown in fig. 3 and 4, the connecting portion 311 has a latch seat 3113 with an opening at one end, and a portion of the elastic thimble 320 and the latch 213 of the ferrule 210 in the pressure sensing assembly 200 are accommodated therein. The connecting portion 311 is provided with two slots 3114 corresponding to the two buckles 213 of the sleeve 210, the two slots 3114 are symmetrically arranged along the radial direction of the housing 100 with a central plane passing through the central axis of the housing 100 as a symmetric plane, each slot 3114 penetrates through the outer side wall and the inner side wall of the connecting portion 311, so that each slot 3114 is communicated with the clamping position 3113 and the outside of the connecting portion 311, the buckle 213 of each pressure sensing assembly 200 is accommodated in the clamping position 3113, and one end of each buckle 213, which is far away from the housing 100, is clamped in one slot 3114; furthermore, one end of the connecting portion 311 close to the pressure sensing assembly 200 is further provided with a limiting groove 3115, and the limiting block 214 of the ferrule 210 is limited in the limiting groove 3115, so that the electrical connection assembly 300 and the pressure sensing assembly 200 can be connected together compactly and firmly without occupying space.
Corresponding to the four signal output terminals on the substrate 231, there are four elastic ejector pins 320, and one end of each elastic ejector pin 320 passes through the bottom wall of the clamping position 3113, is fixedly mounted on the connecting portion 311, and extends to the adapting portion 312 for connecting to an external display device; the other end of each elastic thimble 320 is accommodated in the clamping position 3113 of the connecting portion 311 and abuts against a signal output end of the substrate 231 in the pressure sensing assembly 200.
Specifically, in an optional embodiment, as shown in fig. 5, a portion of each elastic thimble 320 received in the clamping position 3113 includes a first elastic sheet 321, a second elastic sheet 322 and a third elastic sheet 323, wherein the first elastic sheet 321 is attached to the bottom wall of the clamping position 3113, the second elastic sheet 322 is parallel to the first elastic sheet 321, the third elastic sheet 323 is perpendicular to the first elastic sheet 321 and the second elastic sheet 322, two opposite ends of the third elastic sheet 323 are respectively connected to one end of the first elastic sheet 321 and one end of the second elastic sheet 322, and one end of the second elastic sheet 322 far from the third elastic sheet 323 is designed to be hook-shaped, so as to better connect the amplifying and conditioning circuit on the substrate 231. When the second resilient plate 322 is acted by an external force, one end of the second resilient plate 322, which is far away from the third resilient plate 323, can rotate around a direction parallel to the radial direction of the housing 100 and approach the first resilient plate 321, so that the elastic thimble 320 can be deformed in a recoverable manner.
Referring to fig. 2 and 3, when the housing 100, the pressure sensing assembly 200 and the electrical connection assembly 300 are assembled together, the pressure sensing assembly 200 and the electrical connection assembly 300 are clamped with each other, the open end surface of the ferrule 210 in the pressure sensing assembly 200 abuts against the open end surface of the clamping position 3113 in the electrical connection assembly 300, and a distance from the bottom wall of the clamping position 3113 to the substrate 231 is smaller than a distance from the first elastic piece 321 to the second elastic piece 322 in the elastic thimble 320 in a natural state. As described above, since the second elastic sheet 322 of the elastic thimble 320 can be restored and deformed to approach the first elastic sheet 321, in this assembled state, the elastic thimble 320 is abutted by the substrate 231 of the pressure sensing assembly 200 and receives an upward acting force, so that the elastic thimble 320 is compressed to provide an elastic force from the connecting portion 311 of the electrical connection assembly 300 to the direction of the adapting portion 312, so that the step on the connecting portion 311 abuts against the curling edge 104 of the housing 100. Preferably, the compression deformation of the elastic thimble 320 is 0.5 mm-0.8 mm, so that the elastic thimble 320 can firmly abut against the substrate 231 but cannot be too much compressed and deformed to abut against too tightly, thereby scratching the substrate 231.
Thus, the housing 100, the pressure sensing element 200 and the electrical connection element 300 are firmly and compactly assembled together, and the elastic thimble 320 can be firmly abutted against the substrate 231 of the pressure sensing element 200, thereby achieving the technical effect that the electrical connection element 300 and the pressure sensing element 200 can be electrically connected to the substrate 231 to amplify the conditioning circuit without welding.
It should be noted that the number of the elastic pins 320 depends on the number of the signal output terminals on the substrate 231, and the shape of the elastic pins 320 is not limited to the shape shown in the drawings, and may be other types of elastically stretchable structures, as long as the elastic pins can be deformed to be restorable when being subjected to an external force, and can be firmly abutted to the pressure sensing element 200, which is not limited herein.
With continued reference to fig. 2-4, the pressure transmitter 10 is assembled as follows:
firstly, the sealing ring 220 is clamped and mounted in the through hole 212 of the ferrule 210, the MEMS core 232 is soldered at the bottom of the substrate 231 (i.e. the side of the substrate 231 close to the sealing ring 220) by a solder reflow soldering process, and then the MEMS core 232 is electrically connected with the amplifying and conditioning circuit on the substrate 231 by a connecting wire, the substrate 231 is placed on the bottom wall of the accommodating cavity 211 of the ferrule 210 and pressed on the sealing ring 220, so that the MEMS core 232 is mounted in the through hole 212 of the ferrule 210 downward;
then, the latch 213 of the card sleeve 210 is latched into the latch slot 3114 of the connection portion 311 of the electrical connection assembly 300 to latch the electrical connection assembly 300 and the pressure sensing assembly 200, and at this time, the elastic ejector pin 320 of the electrical connection assembly 300 is compressed to abut against the substrate 231 of the pressure sensing assembly 200;
further, the pressure sensing assembly 200 is put into the inner cavity 103 of the housing 100 together with the connecting portion 311 of the electrical sensing assembly, and the electrical connection assembly 300 is pressed, so that the pressure sensing assembly 200 is pressed and placed on the bottom wall of the inner cavity 103;
finally, the end of the housing 100 close to the electrical connection component 300 is riveted through a riveting process to form the crimp 104, so that the step on the connection portion 311 in the electrical connection component 300 is abutted against the inner wall of the crimp 104 and hooks the lower surface of the crimp 104, thereby realizing the connection of the housing 100, the pressure sensing component 200 and the electrical connection component 300, and completing the assembly of the pressure transmitter 10.
Through the design and assembly modes, the pressure transmitter 10 provided by the invention has the advantages that the occupied space is small, the assembly is simple and convenient, the electrical connection assembly 300 is connected with the pressure sensing assembly 200 through the elastic ejector pins 320, the manual welding and assembly are not needed, the connection is more stable and firm compared with the connection mode that most of the existing pressure transmitters 10 are welded through a lead or a flexible circuit board, and the uncertainty of the pressure transmitter 10 in the use process is reduced.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express one of the embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.
Claims (10)
1. A pressure transmitter, comprising:
the shell is provided with an inner cavity communicated with two opposite ends of the shell along the axial direction;
the pressure sensing assembly is arranged in the inner cavity; and
an electrical connection assembly having a connection portion and an adapter portion interconnected along the axial direction, the connection portion being at least partially inserted into the internal cavity;
the electrical connection assembly comprises an elastic thimble arranged on the connecting part, and the elastic thimble abuts against the pressure sensing assembly so that the electrical connection assembly is electrically connected with the pressure sensing assembly; the elastic ejector pin is configured to provide an elastic force along the axial direction and from the connecting part to the direction of the adapter part, so that the connecting part abuts against one end, close to the electrical connection assembly, of the shell.
2. The pressure transmitter of claim 1 wherein the coupling portion snaps onto the pressure sensing component.
3. The pressure transmitter of claim 2, wherein the pressure sensing assembly comprises:
the clamping sleeve is provided with an accommodating cavity, and the bottom wall of the accommodating cavity is provided with a through hole which penetrates through two opposite ends of the clamping sleeve along the axial direction;
the sealing ring is accommodated in the through hole; and
the sensing component is accommodated in the accommodating cavity, one side of the sensing component in the axial direction is pressed against the sealing ring, and the other side of the sensing component in the axial direction is abutted by the elastic thimble.
4. The pressure transmitter of claim 3, wherein the ferrule has at least two spaced apart clips, the electrical connection assembly has at least two corresponding slots on the connecting portion, each slot extends through an inner sidewall and an outer sidewall of the connecting portion, and each clip is partially received in one of the slots.
5. The pressure transmitter of claim 3, wherein a limiting block is disposed on an outer periphery of the ferrule, a limiting groove is correspondingly disposed on an end surface of the connecting portion of the electrical connection assembly, and the limiting block is limited in the limiting groove.
6. The pressure transmitter of claim 3, wherein the sensing component comprises a substrate and a MEMS core, the MEMS core is disposed on a side of the substrate close to the seal ring and is received in the through hole, and the MEMS core is electrically connected to the substrate through a connecting wire.
7. Pressure transmitter according to claim 1, characterized in that the housing has a bead surrounding the electrical connection assembly around the axial direction, the connection portion being held against the bead in the axial direction by the elastic force provided by the elastic spike.
8. The pressure transmitter of claim 1, wherein the connecting portion has a clamping position, the clamping position is close to an opening at one end of the pressure sensing assembly, the elastic ejector pin is partially accommodated in the clamping position, one end of the elastic ejector pin penetrates through a bottom wall of the clamping position and extends into the switching portion, and the other end of the elastic ejector pin abuts against the pressure sensing assembly.
9. The pressure transmitter of claim 1 wherein the resilient thimble is compressed against the pressure sensing assembly for recoverable deformation.
10. A mechanical device comprising a pressure transmitter according to any of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210410416.5A CN114878029A (en) | 2022-04-19 | 2022-04-19 | Pressure transmitter and mechanical equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210410416.5A CN114878029A (en) | 2022-04-19 | 2022-04-19 | Pressure transmitter and mechanical equipment |
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| Publication Number | Publication Date |
|---|---|
| CN114878029A true CN114878029A (en) | 2022-08-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210410416.5A Pending CN114878029A (en) | 2022-04-19 | 2022-04-19 | Pressure transmitter and mechanical equipment |
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| Country | Link |
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| CN (1) | CN114878029A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116481700A (en) * | 2023-06-05 | 2023-07-25 | 山东慧点智能技术有限公司 | Pressure sensor and pressure sensing system |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN211877068U (en) * | 2020-01-07 | 2020-11-06 | 深圳比亚迪微电子有限公司 | Sensor with a sensor element |
| CN216284088U (en) * | 2021-12-09 | 2022-04-12 | 昆山灵科传感技术有限公司 | Pressure sensor |
-
2022
- 2022-04-19 CN CN202210410416.5A patent/CN114878029A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN211877068U (en) * | 2020-01-07 | 2020-11-06 | 深圳比亚迪微电子有限公司 | Sensor with a sensor element |
| CN216284088U (en) * | 2021-12-09 | 2022-04-12 | 昆山灵科传感技术有限公司 | Pressure sensor |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116481700A (en) * | 2023-06-05 | 2023-07-25 | 山东慧点智能技术有限公司 | Pressure sensor and pressure sensing system |
| CN116481700B (en) * | 2023-06-05 | 2024-03-08 | 山东慧点智能技术有限公司 | Pressure sensor and pressure sensing system |
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