CN211008876U

CN211008876U - Pressure sensor of electronic injection throttle valve

Info

Publication number: CN211008876U
Application number: CN201922261614.6U
Authority: CN
Inventors: 金力; 金仁贵
Original assignee: Taizhou Rongmao Electrical Appliance Co ltd
Current assignee: Taizhou Rongmao Electrical Appliance Co ltd
Priority date: 2019-12-16
Filing date: 2019-12-16
Publication date: 2020-07-14
Anticipated expiration: 2029-12-16

Abstract

The utility model provides an electricity spouts throttle pressure sensor belongs to electricity and spouts technical field. The electronic injection throttle pressure sensor comprises a shell, a circuit board horizontally arranged in the shell, and a piezoresistor and a chip which are both arranged on the lower side of the circuit board, wherein a pressing block is integrally formed on the inner wall of the shell and is pressed against the top wall of the circuit board; the pressure measuring pipe is integrally formed on the bottom wall of the shell and located outside the shell, the pipe body is integrally formed in the pressure measuring pipe, the upper end of the pipe body is communicated with the inner cavity of the shell, the lower end of the pipe body is sealed, a temperature measuring channel is formed between the pipe body and the pressure measuring pipe and is not communicated with the inner cavity of the pipe body, the pressure measuring hole is communicated with the temperature measuring channel, and the piezoresistor is located in the pipe body. The utility model discloses the equipment is convenient.

Description

Pressure sensor of electronic injection throttle valve

Technical Field

The utility model belongs to the technical field of the electricity spouts, a pressure sensor is related to, especially an electricity spouts throttle pressure sensor.

Background

The electronic injection throttle valve body assembly is a valve for controlling the air suction amount of an engine, fuel oil and air are fully and effectively mixed according to a certain proportion when a gasoline engine works, the mixture is ignited and exploded by timing, and then energy generated by explosion is transmitted outwards through a crankshaft, wherein various sensors in the electronic injection throttle valve body assembly play an important role in order to achieve the optimal air fuel oil proportion.

The existing electronic injection throttle valve body assembly generally comprises three sensors, namely a temperature sensor, a Hall position sensor and a pressure sensor, wherein the three sensors are respectively used for detecting the temperature inside the valve body, the rotating angle of a valve rod and the air pressure inside the valve body.

The circuit board inside the existing throttle pressure sensor is generally fixed through screws, and is inconvenient to disassemble and assemble.

SUMMERY OF THE UTILITY MODEL

The utility model aims at having the above-mentioned problem to current technique, provided an equipment convenient electricity spouts throttle pressure sensor.

The purpose of the utility model can be realized by the following technical proposal: the electronic injection throttle pressure sensor comprises a shell, a circuit board horizontally arranged in the shell, and a piezoresistor and a chip which are both arranged on the lower side of the circuit board, and is characterized in that a pressing block is integrally formed on the inner wall of the shell and is pressed against the top wall of the circuit board, a barrel-shaped sealing element matched with the chip is sleeved outside the chip, the side wall of the chip is tightly contacted with the inner side wall of the sealing element, the bottom wall of the sealing element is clamped between the chip and the bottom wall of the shell, and a pressure measuring hole opposite to the chip is arranged on the bottom wall of the sealing; the pressure measuring pipe is integrally formed on the bottom wall of the shell and is in a straight pipe shape, the pressure measuring pipe is located outside the shell, the pressure measuring pipe is integrally formed with a pipe body, the upper end of the pipe body is communicated with the inner cavity of the shell, the lower end of the pipe body is in a closed shape, a temperature measuring channel is formed between the outer wall of the pipe body and the inner wall of the pressure measuring pipe, the temperature measuring channel is not communicated with the inner cavity of the pipe body, the pressure measuring hole is communicated with the temperature measuring channel.

The circuit board is positioned under the clamping of the sealing piece and the pressing block, so that the circuit board can be conveniently installed and positioned only by moving the circuit board to the position under the pressing block during actual installation, and the installation steps can be effectively reduced, so that the assembly convenience is improved.

In the electronic injection throttle pressure sensor, the number of the pressing blocks is at least two, and the pressing blocks are distributed on the same straight line and are distributed at intervals along the width direction of the circuit board so as to enhance the positioning effect of the circuit board.

In the electronic injection throttle valve pressure sensor, the four-side inner side wall of the upper end of the sealing element is provided with a guide surface which is obliquely arranged. Under the action of the guide surface, the chip can be inserted conveniently.

In the electronic injection throttle valve pressure sensor, an annular groove is formed in the outer side wall of the pressure measuring pipe, and a sealing ring is arranged in the annular groove. When the temperature measuring device is used, the pressure measuring pipe is inserted into the temperature measuring component, and the sealing ring and the temperature measuring component are sealed.

In the electronic injection throttle valve pressure sensor, at least two annular grooves are distributed along the axial direction of the pressure measuring pipe, and the sealing ring is arranged in each annular groove.

Compared with the prior art, the electronic injection throttle pressure sensor has the following advantages:

1. the circuit board is positioned under the clamping of the sealing piece and the pressing block, so that the circuit board can be conveniently installed and positioned only by moving the circuit board to the position under the pressing block during actual installation, and the installation steps can be effectively reduced, so that the assembly convenience is improved.

2. The tube body for placing the piezoresistor is arranged in the pressure measuring tube, and the height of the inner cavity of the shell can be effectively reduced on the premise of not influencing the temperature measuring precision, so that the thickness of the whole sensor is reduced, and the occupied area is reduced.

Drawings

Fig. 1 is a schematic perspective view of the present pressure sensor.

Fig. 2 is a schematic sectional structure of the pressure sensor.

Fig. 3 is a schematic sectional structure view of the seal member.

In the figure, 1, a housing; 1a, briquetting; 1b, a piezometric tube; 1c, a pipe body; 1d, measuring the temperature of the channel; 2. a circuit board; 3. a voltage dependent resistor; 4. a chip; 5. a seal member; 5a, a pressure measuring hole; 5b, a guide surface; 7. and (5) sealing rings.

Detailed Description

The following are specific embodiments of the present invention and the accompanying drawings are used to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

As shown in fig. 1 and 2, the electronic injection throttle pressure sensor includes a housing 1, a circuit board 2 horizontally disposed in the housing 1, and a varistor 3 and a chip 4 both mounted on a lower side of the circuit board 2.

Specifically, a pressing block 1a is integrally formed on the inner wall of the housing 1, and the pressing block 1a is pressed against the top wall of the circuit board 2. In this embodiment, there are at least two pressing blocks 1a, and a plurality of pressing blocks 1a are distributed on the same straight line and are spaced apart along the width direction of the circuit board 2. The number of compacts 1a is preferably 2.

As shown in fig. 2 and fig. 3, the chip 4 is sleeved with the sealing member 5 which is barrel-shaped and is matched with the chip 4, the side wall of the chip 4 is in close contact with the inner side wall of the sealing member 5, the bottom wall of the sealing member 5 is clamped between the chip 4 and the bottom wall of the shell 1, namely, at the moment, the inner side and the outer side of the bottom wall of the sealing member 5 are respectively in close contact with the chip 4 and the shell 1, and the circuit board 2 is positioned under the clamping of the sealing member 5 and the pressing block 1a, so that the circuit board 2 can be conveniently installed and positioned only by moving the circuit board 2 to the pressing block 1a during actual installation, and thus, the installation. Further, the inner side wall of the periphery of the upper end of the sealing member 5 is provided with a guide surface 5b which is obliquely arranged. To facilitate insertion of the chip 4.

As shown in fig. 2, a pressure measuring hole 5a opposite to the chip 4 is formed in the bottom wall of the sealing member 5 in a penetrating manner, a pressure measuring tube 1b in a straight tube shape is integrally formed in the bottom wall of the casing 1, the pressure measuring tube 1b is located outside the casing 1, a tube body 1c is integrally formed in the pressure measuring tube 1b, the upper end of the tube body 1c is communicated with the inner cavity of the casing 1, the lower end of the tube body 1c is in a closed shape, a temperature measuring channel 1d is formed between the outer wall of the tube body 1c and the inner wall of the pressure measuring tube 1b, the temperature measuring channel 1d is not communicated with the inner cavity of the tube body 1c, the pressure measuring hole 5a is.

Furthermore, an annular groove is formed in the outer side wall of the pressure measuring pipe 1b, and the annular groove and the pressure measuring pipe 1b are arranged coaxially. A sealing ring 7 is arranged in the annular groove. When the temperature measuring device is used, the pressure measuring pipe 1b is inserted into the temperature measuring component, and the sealing ring 7 and the temperature measuring component are sealed. The annular grooves are at least two and are distributed along the axial direction of the piezometer tube 1b, and the sealing ring 7 is arranged in each annular groove. Preferably, the number of the annular grooves and the sealing rings 7 is 2.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.

Claims

1. An electronic injection throttle pressure sensor comprises a shell (1), a circuit board (2) horizontally arranged in the shell (1), and a piezoresistor (3) and a chip (4) which are both arranged on the lower side of the circuit board (2), and is characterized in that a pressing block (1a) is integrally formed on the inner wall of the shell (1), the pressing block (1a) is pressed against the top wall of the circuit board (2), a sealing element (5) which is barrel-shaped and matched with the chip (4) is sleeved outside the chip (4), the side wall of the chip (4) is tightly contacted with the inner side wall of the sealing element (5), the bottom wall of the sealing element (5) is clamped between the chip (4) and the bottom wall of the shell (1), and a pressure measuring hole (5a) which is right opposite to the chip (4) is arranged on the bottom wall of; integrated into one piece has pressure-measuring pipe (1b) that is the straight tube form on casing (1) diapire, and pressure-measuring pipe (1b) is located casing (1) outside, integrated into one piece has body (1c) in pressure-measuring pipe (1b), body (1c) upper end intercommunication casing (1) inner chamber, body (1c) lower extreme is the closure form, form one temperature measurement passageway (1d) between body (1c) outer wall and pressure-measuring pipe (1b) inner wall, temperature measurement passageway (1d) and body (1c) inner chamber do not communicate, and foretell pressure-measuring hole (5a) and temperature measurement passageway (1d) communicate, foretell piezo-resistor (3) are located body (1 c).

2. An electronic injection throttle pressure sensor according to claim 1, characterized in that there are at least two of the above-mentioned pressing blocks (1a), and several pressing blocks (1a) are distributed on the same straight line and are spaced along the width direction of the circuit board (2).

3. An electronic injection throttle pressure sensor according to claim 1 or 2, characterized in that the peripheral inner side wall of the upper end of the sealing member (5) has a guiding surface (5b) arranged obliquely.

4. An electronic injection throttle pressure sensor according to claim 1 or 2, characterized in that the outer side wall of the pressure measuring pipe (1b) is provided with an annular groove, and a sealing ring (7) is arranged in the annular groove.

5. An electronic injection throttle pressure sensor according to claim 4, characterized in that at least two of said annular grooves are distributed along the axial direction of the pressure measuring pipe (1b), and each of said annular grooves is provided with said sealing ring (7).