CN220356568U

CN220356568U - Pressure sensor

Info

Publication number: CN220356568U
Application number: CN202321358048.0U
Authority: CN
Inventors: 王小平; 曹万; 施涛; 张超军
Original assignee: Wuhan Finemems Inc
Current assignee: Wuhan Finemems Inc
Priority date: 2023-05-31
Filing date: 2023-05-31
Publication date: 2024-01-16
Anticipated expiration: 2033-05-31

Abstract

The utility model discloses a pressure sensor, which comprises a joint, a runner, a first cavity, a second cavity, a first internal thread, a second internal thread, a first sealing ring, a diaphragm, a first fixed block, a second sealing ring, a pressure sensing element, a second fixed block, a spring piece, a clamping block, a shell and a spring, wherein the first internal thread is arranged on the joint; one end of the flow channel is provided with a second cavity, the other end of the flow channel is provided with a first cavity, the diaphragm is arranged in the second cavity, and the pressure sensing element is arranged in the first cavity; the utility model adopts the design of pressure interval transmission, utilizes the diaphragm and the medium to transmit pressure, replaces the existing oil duct structure, solves the problem of blockage of the oil duct, and avoids the corrosion of engine oil to the pressure sensing element; the utility model adopts the double springs to insulate and damp the shell provided with the circuit board, thereby avoiding the adverse effect of vibration and high temperature on the circuit board.

Description

Pressure sensor

Technical Field

The utility model relates to the technical field of sensors, in particular to a pressure sensor.

Background

The pressure sensor for the gearbox is a device for measuring oil pressure, and the principle is that a pressure signal is converted into an electric signal through a pressure sensing element; the existing oil pressure sensor has the following defects when in use: the joint positions of the existing oil pressure sensors are all provided with oil channels, one end of each oil channel is provided with a pressure sensing element, the other end of each oil channel is communicated with a main oil channel, the design is easy to cause faults due to blockage of the oil channels, and engine oil has certain corrosiveness on the pressure sensing elements; secondly, high temperature and vibration can both have adverse effects on the stability of the electronic element of the oil pressure sensor, however, the electronic element part and the joint part of the existing oil pressure sensor are designed on the same shell, so that vibration is rapidly transmitted to the electronic element, and a high-temperature medium is directly contacted with the electronic element, so that the service life and detection accuracy of the electronic element are reduced.

Disclosure of Invention

The present utility model is directed to a pressure sensor that solves the above-mentioned problems.

In order to solve the technical problems, the utility model provides the following technical scheme: the utility model provides a pressure sensor, includes the joint, has offered the runner in the joint, has filled pressure conduction medium in the runner, still including diaphragm and pressure sensing element, pressure sensing element installs in one side of runner, the diaphragm is kept away from pressure sensing element sets up so that form the one section to pass through between the two the medium chamber of runner intercommunication, pressure sensing element electric connection has the circuit board, one side fixedly connected with contact pin of keeping away from the medium chamber of circuit board, the casing has been cup jointed in the outside of circuit board, the upper and lower both ends of casing are all connected through the elastic component the inner wall of joint makes the casing is in non-fixed connection state.

Preferably, the second cavity is arranged at one end of the flow channel, the first cavity is arranged at the other end of the flow channel, the diaphragm is arranged in the second cavity, and the pressure sensing element is arranged in the first cavity.

Preferably, the upper surface of diaphragm is provided with first sealing washer, and the lower surface is provided with first fixed block, and first sealing washer cup joints in the second cavity, and first fixed block threaded connection is provided with the second fixed block in the second cavity, and the lower surface is provided with the second sealing washer, and second fixed block threaded connection is in first cavity, and the second sealing washer cup joints in first cavity.

Preferably, the first cavity is internally provided with a first internal thread, the second cavity is internally provided with a second internal thread, the second fixing block is in threaded connection with the first internal thread, and the first fixing block is in threaded connection with the second internal thread.

Preferably, the upper surface fixedly connected with a plurality of shell fragments of second fixed block, and the shell fragment sets up in the outside of casing, fixedly connected with fixture block on the shell fragment, and the top of casing is provided with the apron, has seted up the draw-in groove on the apron, and the fixture block joint is in the draw-in groove.

Preferably, the elastic component is the spring, and the upper and lower both ends of casing all are equipped with the socket joint structure, and the upper end passes through the internal surface of first spring coupling apron, and the lower extreme passes through the upper surface of second fixed block of second spring coupling.

Preferably, the pressure sensing element is any one of a pressure strain gauge, a MEMS pressure core and a thick film pressure sensitive head.

Preferably, the voltage sensing element is electrically connected with the circuit board through a signal wire passing through the clearance between the wiring hole circuit board and the buckles reserved in the connector body.

The pressure sensor provided by the utility model has the advantages that: the utility model adopts the design of pressure interval transmission, utilizes the diaphragm and the medium to transmit pressure, replaces the existing oil duct structure, solves the problem of blockage of the oil duct, and avoids the corrosion of engine oil to the pressure sensing element; the utility model adopts the double springs to insulate and damp the shell provided with the circuit board, thereby avoiding the adverse effect of vibration and high temperature on the circuit board.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are some embodiments of the present utility model, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic overall perspective view of the present utility model;

FIG. 2 is a schematic view of the overall front cut-away structure of the present utility model;

fig. 3 is a schematic view of a three-dimensional cutaway structure of a joint according to the present utility model.

In the figure: 1. a joint; 11. a flow passage; 12. a first cavity; 13. a second cavity; 14. a first internal thread; 15. a second internal thread; 16. a first seal ring; 17. a membrane; 18. a first fixed block; 19. a second seal ring; 110. a pressure sensing element; 2. a second fixed block; 21. a spring plate; 22. a clamping block; 23. a housing; 24. a spring; 25. a circuit board; 26. a contact pin; 27. a cover plate; 28. a clamping groove.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments of the present utility model. All other embodiments, which can be made by one of ordinary skill in the art without inventive faculty, are intended to be within the scope of the present utility model, based on the embodiments of the present utility model.

Referring to fig. 1-3, an embodiment of the present utility model is provided: the utility model provides a pressure sensor, including joint 1, the passageway 11 has been seted up in the joint 1, the diaphragm 17 is installed to the one end of passageway 11, the pressure sensing element 110 is installed to the other end, pressure sensing element passes the clearance and circuit board 25 electric connection of wiring hole circuit board and a plurality of buckle that reserve in the joint body through the signal line, the upper surface fixedly connected with contact pin 26 of circuit board 25, casing 23 has been cup jointed in the outside of circuit board 25, casing 23's top is provided with apron 27, the draw-in groove 28 has been seted up on the apron 27, casing's upper and lower both ends all are equipped with the socket joint structure, the upper end passes through the internal surface of first spring connection apron 27, the lower extreme passes through the upper surface of second fixed block of second spring connection; one end of the flow channel 11 is provided with a second cavity 13, the other end is provided with a first cavity 12, the diaphragm 17 is arranged in the second cavity 13, and the pressure sensing element 110 is arranged in the first cavity 12; the pressure sensing element is any one of a pressure strain gauge, an MEMS pressure core body and a thick film pressure sensing head. The upper surface of the diaphragm 17 is provided with a first sealing ring 16, the lower surface is provided with a first fixing block 18, the first sealing ring 16 is sleeved in the second cavity 13, the first fixing block 18 is connected in the second cavity 13 in a threaded manner, the upper surface of the pressure sensing element 110 is provided with a second fixing block 2, the lower surface is provided with a second sealing ring 19, the second fixing block 2 is connected in the first cavity 12 in a threaded manner, and the second sealing ring 19 is sleeved in the first cavity 12; a first internal thread 14 is formed in the first cavity 12, a second internal thread 15 is formed in the second cavity 13, the second fixed block 2 is connected to the first internal thread 14 in a threaded manner, and the first fixed block 18 is connected to the second internal thread 15 in a threaded manner; the upper surface fixedly connected with a plurality of shell fragments 21 of second fixed block 2, and shell fragment 21 sets up in the outside of casing 23, fixedly connected with fixture block 22 on the shell fragment 21, and the top of casing 23 is provided with apron 27, has seted up draw-in groove 28 on the apron 27, and fixture block 22 joint is in draw-in groove 28.

Working principle: when the utility model is assembled and used, the first sealing ring 16, the diaphragm 17 and the first fixed block 18 are firstly sequentially arranged in the second cavity 13, then a medium is injected into the flow channel 11 of the joint 1 through the first cavity 12, then the second sealing ring 19, the pressure sensing element 110 and the second fixed block 2 are sequentially arranged in the first cavity 12, then the shell 23 provided with the spring 24 is arranged on the second fixed block 2, the cover plate 27 is arranged on the elastic sheet 21, the clamping is realized through the clamping block 22 and the clamping groove 28, after the assembly is completed, the joint 1 is arranged on the gearbox, the oil pressure is transmitted to the medium through the diaphragm 17, and the medium transmits the oil pressure to the pressure sensing element 110; the medium is fluid, the adopted medium has good stability and has no corrosiveness to other elements, the first internal thread 14 is used for installing the second fixed block 2, the second internal thread 15 is used for installing the first fixed block 18, the circuit board 25 is installed in the shell 23, the contact pin 26 is arranged on the circuit board 25 and used for being connected with a signal wire, the shell 23 realizes omnibearing shock absorption through the two springs 24, meanwhile, the direct contact with the second fixed block 2 is avoided, the heat transfer is reduced, the gap of the elastic sheet 21 is used for gas circulation, and the heat dissipation is further improved.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

The apparatus embodiments described above are merely illustrative, wherein the elements illustrated as separate elements may or may not be physically separate, and the elements shown as elements may or may not be physical elements, may be located in one place, or may be distributed over a plurality of network elements. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment. Those of ordinary skill in the art will understand and implement the present utility model without undue burden.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present utility model, and are not limiting; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present utility model.

Claims

1. A pressure sensor comprising a joint (1), characterized in that: the connector is characterized in that a runner (11) is arranged in the connector (1), a pressure conducting medium is filled in the runner (11), the connector further comprises a diaphragm (17) and a pressure sensing element (110), the pressure sensing element (110) is arranged on one side of the runner (11), the diaphragm (17) is far away from the pressure sensing element (110) so that a section of medium cavity communicated with the runner (11) is formed between the diaphragm and the pressure sensing element, the pressure sensing element (110) is electrically connected with a circuit board (25), a contact pin (26) is fixedly connected to one side, far away from the medium cavity, of the circuit board (25), a shell (23) is sleeved on the outer side of the circuit board (25), and the upper end and the lower end of the shell (23) are connected with the inner wall of the connector (1) through elastic pieces (24) so that the shell (23) is in a non-fixed connection state.

2. A pressure sensor according to claim 1, characterized in that: one end of the flow channel (11) is provided with a second cavity (13), the other end of the flow channel is provided with a first cavity (12), the diaphragm (17) is arranged in the second cavity (13), and the pressure sensing element (110) is arranged in the first cavity (12).

3. A pressure sensor according to claim 2, characterized in that: the upper side of diaphragm (17) is provided with first sealing washer (16), and the downside is provided with first fixed block (18), and first sealing washer (16) cup joint in second cavity (13), and first fixed block (18) threaded connection is in second cavity (13), and the upside of inductive element (110) is provided with second fixed block (2), and the downside is provided with second sealing washer (19), and second fixed block (2) threaded connection is in first cavity (12), and second sealing washer (19) cup joint in first cavity (12).

4. A pressure sensor according to claim 3, characterized in that: the inner wall of the first cavity (12) is provided with a first internal thread (14), the inner wall of the second cavity (13) is provided with a second internal thread (15), the second fixing block (2) is in threaded connection with the first internal thread (14), and the first fixing block (18) is in threaded connection with the second internal thread (15).

5. A pressure sensor as claimed in claim 4, wherein: the upper surface fixedly connected with of second fixed block (2) is a plurality of buckles (21), and buckle (21) set up in the outside of casing (23), fixedly connected with fixture block (22) on buckle (21), and the top of casing (23) is provided with apron (27), has seted up draw-in groove (28) on apron (27), and fixture block (22) joint in draw-in groove (28).

6. A pressure sensor as claimed in claim 5, wherein: the elastic piece is a spring, the upper end and the lower end of the shell (23) are respectively provided with a sleeving structure, the upper end of the elastic piece is connected with the inner surface of the cover plate (27) through a first spring, and the lower end of the elastic piece is connected with the upper surface of the second fixed block (2) through a second spring.

7. A pressure sensor according to claim 1, characterized in that: the pressure sensing element (110) is any one of a pressure strain gauge, an MEMS pressure core body and a thick film pressure sensitive head.

8. A pressure sensor as claimed in claim 5, wherein:

the voltage sensing element (110) is electrically connected with the circuit board (25) through a signal wire passing through a wiring hole reserved in the connector (1) body and gaps between the circuit board (25) and the plurality of buckles (21).