CN209623939U - A kind of pressure sensor - Google Patents
A kind of pressure sensor Download PDFInfo
- Publication number
- CN209623939U CN209623939U CN201920575688.4U CN201920575688U CN209623939U CN 209623939 U CN209623939 U CN 209623939U CN 201920575688 U CN201920575688 U CN 201920575688U CN 209623939 U CN209623939 U CN 209623939U
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- pressure
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- cavity
- pcb board
- chip
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Abstract
The utility model relates to a kind of pressure sensors, including pcb board, pressure chip, rectangular seal and shell, the shell has a cavity, the air inlet of connection crankcase and cavity is provided on the shell, the pcb board, pressure chip and rectangular seal are respectively mounted in the cavity, the pressure chip senses the pressure in crankcase by air inlet, the rectangular seal is arranged between cavity bottom and pressure chip, the pressure chip is attached on pcb board, at least two buckles are provided on the cavity inner wall, the buckle is for pushing down the outside of pcb board.The problems such as the utility model, which compresses pcb board using the buckle on shell, makes rectangular seal compressive deformation realize product seal request, and Product Precision caused by locking so as to improve screw is poor.
Description
Technical field
The utility model relates to crankcase pressure sensor technical fields, more particularly to a kind of pressure sensor.
Background technique
Crankcase pressure sensor is one of tens kinds of sensors on automobile, for detecting engine crankshaft box cavity
Pressure according to the pressure value of inner cavity and then determines whether there is exhaust emissions risk, and the pressure value that will test is converted into corresponding electricity
Pressure value, and pressure signal is sent into ECU (electronic control unit of automobile).
The sealing structure that crankcase pressure sensor universal at present uses, is to be locked assembled pcb board by screw
It fastens on shell, rectangular seal is placed between shell and pressure chip, for meeting pressure chip and cage connection
Locate sealing requirements.There are the following problems for such sealing structure:
1, rectangular seal needs the compressive deformation after screw locks pcb board to realize sealing, causes rectangular seal right
Pressure chip generates a reaction force, since screw installation torsion is different (technological parameter is difficult to control), what pressure chip was subject to
It is larger that stress difference will lead to output valve deviation, low precision；
2. product actual assembled need to install 2 screws, and producing line assembling needs certain working hour, to increase the working hour of product
Cost and material cost.
Summary of the invention
The technical problem to be solved by the utility model is to provide a kind of pressure sensors, are compressed using the buckle on shell
Pcb board makes rectangular seal compressive deformation realize product seal request, and Product Precision caused by locking so as to improve screw is poor
The problems such as.
The technical scheme adopted by the utility model to solve the technical problem is as follows: providing a kind of pressure sensor, including PCB
Plate, pressure chip, rectangular seal and shell, the shell have a cavity, be provided on the shell connection crankcase and
The air inlet of cavity, the pcb board, pressure chip and rectangular seal are respectively mounted in the cavity, and the pressure chip is logical
The pressure in air inlet sensing crankcase is crossed, the rectangular seal is arranged between cavity bottom and pressure chip, described
Pressure chip be attached on pcb board, at least two buckles are provided on the cavity inner wall, the buckle is for pushing down PCB
The outside of plate.
As a kind of supplement to technical solution described in the utility model, the pressure chip is differential integrated core
Piece.
It further include the contact pin being welded on pcb board as a kind of supplement to technical solution described in the utility model, it should
Contact pin is used to the pressure signal that pressure chip perceives being transferred to automobile ECU system.
As a kind of supplement to technical solution described in the utility model, have in the lower case of the shell consistent
Perforation forms air inlet, is provided with an exterior seal ring on the lower case lateral wall of the shell.
It further include upper cover as a kind of supplement to technical solution described in the utility model, which passes through hook knot
Structure is fixed on the shell.
It further include waterproof ventilated membrane, the inside cavity side is provided with the atmospheric pressure air through hole outside connection, should
Waterproof ventilated membrane is pasted at the lower port of atmospheric pressure air through hole.
The utility model has the advantages that using new sealing structure, cancelling screw the utility model relates to a kind of pressure sensor, using
Buckle on shell, which compresses pcb board, makes rectangular seal compressive deformation realize product seal request, so as to improve screw locking
The problems such as caused Product Precision is poor, greatly improved the output accuracy of product, and reduce material cost and the working hour of product
Cost.The structure of the utility model has following outstanding feature compared with existing product: 1. output of products precision are high and stablize, and adopt
With buckle pressing sealing structure, leakproofness mainly passes through product parts control, caused by avoiding because of screw installation torsion difference
The problems such as output accuracy is poor, the output accuracy of pressure chip completely can by the deflection of part control rectangle sealing ring itself come
Optimization guarantees product stability.2. assembled pcb board is directly loadable into outer by simple and reliable process during actual assembled
In the buckle of shell, so that rectangular seal compressive deformation and pressure chip is realized seal request, eliminates 2 screw mounting process,
Simple and reliable process, and product yield is improved to a certain extent.3. product cost reduces, sealing knot is compressed using buckle
Structure, eliminate existing product 2 screws and organize cartridge screw technique, significantly reduce product material cost and working hour at
This.
Detailed description of the invention
Fig. 1 is the main view direction schematic diagram of internal structure of the utility model；
Fig. 2 is the left view direction schematic diagram of internal structure of the utility model；
Fig. 3 is the partial enlarged view of the utility model Fig. 2；
Fig. 4 is the structural schematic diagram of the utility model；
Fig. 5 is the main view direction schematic diagram of internal structure of the utility model.
Diagram: 1, upper cover, 2, cavity, 3, pcb board, 4, pressure chip, 5, rectangular seal, 6, shell, 7, exterior seal ring,
8, contact pin, 9, air inlet, 10, buckle, 11, waterproof ventilated membrane, 12, atmospheric pressure air through hole.
Specific embodiment
The present invention will be further illustrated below in conjunction with specific embodiments.It should be understood that these embodiments are merely to illustrate this
Utility model rather than limitation the scope of the utility model.In addition, it should also be understood that, in the content for having read the utility model instruction
Later, those skilled in the art can make various changes or modifications the utility model, and such equivalent forms equally fall within this Shen
It please the appended claims limited range.
The embodiments of the present invention is related to a kind of pressure sensor, as shown in Figs. 1-5, including pcb board 3, pressure core
Piece 4, rectangular seal 5 and shell 6, the shell 6 have a cavity 2, connection crankcase and cavity are provided on the shell 6
2 air inlet 9, the pcb board 3, pressure chip 4 and rectangular seal 5 are installed in cavity 2, the pressure chip 4
Sense the pressure in crankcase by air inlet 9, the described setting of rectangular seal 52 bottom of cavity and pressure chip 4 it
Between, the pressure chip 4 is attached on pcb board 3, and pressure chip 4 is attached on pcb board 3 by SMT technique, the chamber
At least two buckles 10 are provided on 2 inner wall of body, which is used to push down the outside of pcb board 3.
2 bottom of cavity is provided with the limiting slot for placing rectangular seal 5, in assembling process, is packed into rectangle in cavity 2 first
Sealing ring 5, pressure chip 4 are attached on pcb board 3 by SMT technique, and assembled pcb board 3 is then directly loadable into shell 6
Buckle 10 in, buckle 10 makes rectangular seal compressive deformation 5 and pressure chip 4 realize seal request for pushing down pcb board 3.
Current crankcase pressure product sensor structure is analyzed, leading to the basic reason of output of products low precision is screw lock
The stress difference that tight installation torsion difference receives pressure chip causes, and increases material cost and the working hour of product, this is practical
Novel to cancel screw using new sealing structure, compressing pcb board 3 using the buckle 10 on shell 6 makes rectangular seal 5 be pressurized
The problems such as product seal request is realized in deformation, and Product Precision caused by locking so as to improve screw is poor, greatly improved product
Output accuracy, and reduce the material cost and time cost of product.
The pressure chip 4 is differential integrated chip.It further include the contact pin 8 being welded on pcb board 3, which uses
Automobile ECU system is transferred in the pressure signal for perceiving pressure chip 4.
There is pass through aperture in the lower case of the shell 6, form air inlet 9, the lower case outside of the shell 6
An exterior seal ring 7 is provided on wall.The exterior seal ring 7 for realizing shell 6 and engine pipeline junction seal request.
It further include upper cover 1, which is fixed on shell 6 by coupler construction.
It further include waterproof ventilated membrane 11,2 interior side of cavity is provided with the atmospheric pressure air through hole outside connection
12, waterproof ventilated membrane 11 is pasted at the lower port of the atmospheric pressure air through hole 12.
Claims (6)
1. a kind of pressure sensor, it is characterised in that: including pcb board (3), pressure chip (4), rectangular seal (5) and shell
(6), the shell (6) has a cavity (2), and the air inlet of connection crankcase and cavity (2) is provided on the shell (6)
(9), the pcb board (3), pressure chip (4) and rectangular seal (5) are installed in cavity (2), the pressure chip
(4) pressure in crankcase is sensed by air inlet (9), the rectangular seal (5) is arranged in cavity (2) bottom and pressure
Between chip (4), the pressure chip (4) is attached on pcb board (3), is provided at least two on the cavity (2) inner wall
A buckle (10), the buckle (10) are used to push down the outside of pcb board (3).
2. a kind of pressure sensor according to claim 1, it is characterised in that: the pressure chip (4) is differential
Integrated chip.
3. a kind of pressure sensor according to claim 1, it is characterised in that: further include being welded in inserting on pcb board (3)
Needle (8), the contact pin (8) are used to the pressure signal that pressure chip (4) perceive being transferred to automobile ECU system.
4. a kind of pressure sensor according to claim 1, it is characterised in that: tool in the lower case of the shell (6)
There is pass through aperture, formed air inlet (9), is provided with an exterior seal ring (7) on the lower case lateral wall of the shell (6).
5. a kind of pressure sensor according to claim 1, it is characterised in that: further include upper cover (1), the upper cover (1) is logical
Coupler construction is crossed to be fixed on shell (6).
6. a kind of pressure sensor according to claim 1, it is characterised in that: it further include waterproof ventilated membrane (11), it is described
Cavity (2) interior side be provided with the atmospheric pressure air through hole (12) outside connection, under the atmospheric pressure air through hole (12)
Waterproof ventilated membrane (11) are pasted at port.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920575688.4U CN209623939U (en) | 2019-04-25 | 2019-04-25 | A kind of pressure sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920575688.4U CN209623939U (en) | 2019-04-25 | 2019-04-25 | A kind of pressure sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209623939U true CN209623939U (en) | 2019-11-12 |
Family
ID=68459012
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920575688.4U Active CN209623939U (en) | 2019-04-25 | 2019-04-25 | A kind of pressure sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209623939U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112444339A (en) * | 2020-11-09 | 2021-03-05 | 青岛歌尔智能传感器有限公司 | Differential pressure sensor test fixture and differential pressure sensor test system |
| CN115014627A (en) * | 2022-05-31 | 2022-09-06 | 武汉新烽光电股份有限公司 | High-precision atmospheric pressure sensor |
-
2019
- 2019-04-25 CN CN201920575688.4U patent/CN209623939U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112444339A (en) * | 2020-11-09 | 2021-03-05 | 青岛歌尔智能传感器有限公司 | Differential pressure sensor test fixture and differential pressure sensor test system |
| CN112444339B (en) * | 2020-11-09 | 2022-06-21 | 青岛歌尔智能传感器有限公司 | Differential pressure sensor test fixture and differential pressure sensor test system |
| CN115014627A (en) * | 2022-05-31 | 2022-09-06 | 武汉新烽光电股份有限公司 | High-precision atmospheric pressure sensor |
| CN115014627B (en) * | 2022-05-31 | 2023-07-21 | 武汉新烽光电股份有限公司 | High-precision atmospheric pressure sensor |
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