Automobile pressure sensor

Abstract

The utility model provides an automobile pressure sensor, which belongs to the technical field of automobile accessories, and comprises a thick film sensing chip arranged at the upper part in a pipe barrel shell, a signal processing circuit assembly arranged on the thick film sensing chip, an internal thread arranged at the lower end in the pipe barrel shell, a plurality of first filtering assemblies arranged at the upper part of the internal thread, and a second filtering assembly arranged at the lower part of the pipe barrel shell, a movable sleeve is arranged on the lower portion of the pipe barrel shell, the upper end and the lower end of the movable sleeve are each provided with an external thread, a filtering ball layer is arranged in the middle of the interior of the movable sleeve, a baffle is arranged on the lower portion of the filtering ball layer, and a second filtering assembly is detachably arranged on the upper portion of the filtering ball layer. Impurities are filtered for the first time through the second filtering assembly, oil liquid making contact with the thick film sensing chip is filtered for the second time through the first filtering assembly, and therefore the oil pressure detection precision of the engine oil pressure sensor is stabilized.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of automobile parts, specifically relates to a car pressure sensor. BACKGROUND

[0002] The oil pressure sensor is installed on the main oil passage of the engine lubricating system and is used for detecting the oil pressure of the engine. When the oil pressure is detected to be too high, the oil pressure signal is output to the ECU (Electronic Control Unit) in the form of voltage, and then the ECU controls the oil lamp on the oil pressure gauge to light up, so as to remind the owner to take corresponding measures, such as replacing the oil or replacing the oil filter. When the oil pressure is detected to be too low, the oil pressure signal is output to the ECU in the form of voltage, and then the ECU controls the oil lamp on the oil pressure gauge to light up, and the ECU controls the variable oil pump to control the oil supply amount of the oil pump, so that the engine lubrication is in the best working condition. If there is no oil pressure sensor, when problems such as lack of oil occur, irreversible damage to the engine will be caused, so the oil pressure sensor plays a crucial role in the engine.

[0003] The oil pressure sensor in the related art comprises a tube shell and a thick film sensing chip, one end of the tube shell is connected with the main oil passage, the other end is connected with the thick film sensing chip, and the oil in the main oil passage flows into the oil passage of the tube shell and is measured by the thick film sensing chip to obtain the oil pressure.

[0004] However, when there are many impurities in the oil, the impurities are easy to block the oil passage in the tube shell, which is not convenient to clean, so that the oil pressure sensor cannot measure the oil pressure. To solve the above problems, the present application provides a car pressure sensor to solve the above problems. UTILITY MODEL CONTENTS

[0005] Therefore, the utility model provides a car pressure sensor, oil liquid enters the tube shell through the movable sleeve, the first filter assembly is arranged on the upper end of the inner thread of the tube shell, the second filter assembly is arranged on the upper end of the movable sleeve, and the oil liquid contacting the thick film sensing chip is filtered twice, so that the precision of the oil pressure detected by the oil pressure sensor is stable.

[0006] To solve the above technical problems, the utility model provides a car pressure sensor, which comprises a thick film sensing chip installed in the upper part of a tube shell, a signal processing circuit assembly arranged on the thick film sensing chip, an inner thread arranged at the lower end of the tube shell, a plurality of first filter assemblies arranged on the upper part of the inner thread, a movable sleeve arranged at the lower part of the tube shell, an outer thread arranged at the upper and lower ends of the movable sleeve, a filter ball layer arranged in the movable sleeve, a baffle arranged at the lower part of the filter ball layer, and a second filter assembly arranged at the upper part of the filter ball layer in a detachable mode.

[0007] Each first filter assembly comprises a first filter plate which is attached to the inner wall of the tube shell, the first filter plate is used to filter the oil liquid which contacts the thick film sensor chip, so as to reduce the probability of the thick film sensor chip contacting the impurities of the oil liquid, thereby stabilizing the measurement accuracy, the upper and lower surfaces of the first filter plate are provided with a positioning ring, the positioning ring is used to fixedly install the first filter plate, so that the first filter plate is connected with the inner wall of the tube shell, and the positioning ring is hot melt connected with the inner wall of the tube shell.

[0008] A connecting plate is arranged between the thick film sensor chip and the first filter assembly, the connecting plate is used to fixedly support the thick film sensor chip and the protective shell, an opening is arranged in the middle of the connecting plate, and the opening is used to make the oil liquid contact the detection end on the thick film sensor chip.

[0009] A protective shell is arranged on the surface of the thick film sensor chip, the protective shell is used to protect the thick film sensor chip, a plurality of first threaded holes are arranged on the top of the protective shell, the first threaded holes are used to fixedly install first bolts, each first threaded hole penetrates the protective shell and is embedded on the connecting plate, a first bolt is arranged in the first threaded hole, and the first bolt is used to fixedly connect the protective shell and the connecting plate, thereby strengthening the fastening of the thick film sensor chip.

[0010] A sealing plate is detachably arranged on the top of the tube shell, the sealing plate is used to seal the top of the tube shell, and the thick film sensor chip can be repaired and replaced when necessary.

[0011] A threaded sealing connector is arranged on one side of the signal processing circuit assembly, the threaded sealing connector is used to prevent the electric wire connected to the signal processing circuit from entering dust, the threaded sealing connector is connected with the tube shell, and a wire penetrating pipe is arranged on the end of the threaded sealing connector which is away from the tube shell, the wire penetrating pipe is used for the communication between the threaded sealing connector and the tube shell, and the wire penetrating pipe is used for the connection of the electric wire.

[0012] The baffle is hot melt fixed with the inner wall of the movable sleeve, a plurality of filter holes are arranged on the surface of the baffle, and the filter holes are used for the oil liquid to enter the filter ball layer.

[0013] The second filter assembly comprises a second filter plate which is attached to the inner wall of the movable sleeve, the second filter plate is used to filter the oil liquid which enters the tube shell, so as to reduce the impurities of the oil liquid which enters the tube shell, a positioning ring is arranged on the lower surface of the second filter plate, the positioning ring is used to support the second filter plate, a connecting ring is arranged on the upper surface of the second filter plate, the connecting ring is used to fixedly install the second filter plate, thereby reinforcing the connection between the second filter plate and the positioning ring, a plurality of second threaded holes are arranged on the top of the connecting ring, the second threaded holes are used to install second bolts, each second threaded hole penetrates the second filter plate and is embedded in the positioning ring, a second bolt is arranged in the second threaded hole, and the second bolt is used to connect the connecting ring and the positioning ring with the second filter plate.

[0014] In summary, compared with the prior art, the present application has at least one of the following beneficial technical effects:

[0015] 1, the outer bolt of the movable sleeve is connected with the inner thread of the lower end of the pipe shell, so that the movable sleeve is sealingly connected with the pipe shell, and then the outer thread of the lower end of the movable sleeve is installed on the threaded interface of the main oil circuit to be detected, oil enters the pipe shell through the movable sleeve, is filtered once by the second filter plate, and is filtered twice by the first filter plate to contact the thick film sensing chip, so that the precision of the oil pressure sensor in detecting oil pressure is stabilized.

[0016] 2, when the movable sleeve is blocked, the outer thread is separated from the inner thread, the second bolt is disassembled to separate the connecting ring from the second filter plate, so that the second filter plate is taken out, the filter balls in the filter ball layer are taken out in reverse, the time for blocking the first filter assembly is delayed, and the service life of the component is increased. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a schematic view of the main structure of the utility model;

[0018] Figure 2 It is a schematic view of the disassembly structure of the utility model;

[0019] Figure 3 It is a sectional view of the main body of the utility model;

[0020] Figure 4 It is a schematic view of the main structure of the utility model; Figure 3

[0021] Figure 5 It is a schematic view of the main structure of the utility model; Figure 3

[0022] Reference signs: 100, pipe shell; 101, thick film sensing chip; 102, signal processing circuit assembly; 103, inner thread; 104, connecting plate; 105, opening; 106, sealing plate; 107, threaded sealing joint; 108, threading pipe; 200, first filter assembly; 201, first filter plate; 202, positioning ring; 203, protective shell; 204, first threaded hole; 205, first bolt; 300, movable sleeve; 301, outer thread; 302, filter ball layer; 303, baffle; 304, filter hole; 400, second filter assembly; 401, second filter plate; 402, positioning ring; 403, connecting ring; 404, second threaded hole; 405, second bolt. DETAILED DESCRIPTION

[0023] ​​In order to make the purpose, technical solutions and advantages of the embodiment of the present invention clearer, the following will be combined with the appended drawings of the embodiment of the present invention. Figures 1-5 The technical solutions of the embodiments of the present invention are clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the described embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field are within the scope of protection of the present invention.

[0024] like Figures 1-5 As shown: This embodiment provides an automotive pressure sensor, including a thick film sensor chip 101 installed in the upper part of a tube housing 100. The thick film sensor chip 101 is used to sense the oil pressure and convert it into an electrical signal. A signal processing circuit component 102 is provided on the thick film sensor chip 101. The signal processing circuit component 102 includes a power supply circuit, a sensor compensation circuit, a zero adjustment circuit, a voltage amplification circuit, a current amplification circuit, a filtering circuit, and an alarm circuit, etc., and is used to process and amplify the electrical signal output by the sensor chip. The lower end of the tube housing 100 is provided with an internal thread 103 The internal thread 103 is fixed to the tube shell 100 by hot melt, and a plurality of first filter components 200 are arranged on the upper part of the internal thread 103. A movable sleeve 300 is arranged at the lower part of the tube shell 100. An external thread 301 is arranged at the upper and lower ends of the movable sleeve 300. The external thread 301 is fixed to the movable sleeve 300 by hot melt, and a filter ball layer 302 is arranged in the middle part of the movable sleeve 300. The filter ball layer 302 is composed of a number of impurity adsorption balls. A baffle 303 is arranged at the lower part of the filter ball layer 302, and a second filter component 400 is detachably arranged on the upper part of the filter ball layer 302.

[0025] During use, the external bolt at the upper end of the movable sleeve 300 is connected to the internal thread 103 at the lower end of the tube housing 100, so that the movable sleeve 300 is sealed with the tube housing 100, and then the external thread 301 at the lower end of the movable sleeve 300 is installed on the threaded interface of the main oil circuit to be detected. The oil enters the tube housing 100 through the movable sleeve 300, and the impurities are filtered once by the second filter plate 401. The oil contacting the thick film sensor chip 101 is filtered twice by the first filter plate 201, thereby stabilizing the accuracy of the oil pressure sensor in detecting the oil pressure.

[0026] This embodiment provides an automobile pressure sensor,

[0027] like Figure 2 、 3, 4, 5: each first filter assembly 200 comprises a first filter plate 201 attached to the inner wall of the tube shell 100, the first filter plate 201 is fixed by bolt connection with the positioning ring 202, the upper and lower surfaces of the first filter plate 201 are provided with a positioning ring 202, the inner ring of the positioning ring 202 is used for circulating oil, the positioning ring 202 is used for fixedly installing the first filter plate 201, so that the first filter plate 201 is connected with the inner wall of the tube shell 100, and the positioning ring 202 is hot melt connected with the inner wall of the tube shell 100.

[0028] The effect is that the first filter plate 201 is used for filtering the oil in contact with the thick film sensor chip 101, so as to reduce the probability of the thick film sensor chip 101 contacting the oil impurities, and further stabilize the measurement accuracy of the thick film sensor chip 101.

[0029] As shown in Figure 2 , 3 , 4, 5: the thick film sensor chip 101 and the first filter assembly 200 are provided with a connecting plate 104, the connecting plate 104 and the thick film sensor chip 101 can be fixed by bolt connection through the protective shell 203, the connecting plate 104 is used for fixedly supporting the thick film sensor chip 101 and the protective shell 203, the protective shell 203 is sleeved on the surface of the thick film sensor chip 101, the opening 105 is provided in the middle of the connecting plate 104, the opening 105 is used for making the oil contact the detection end on the thick film sensor chip 101, the protective shell 203 is arranged on the surface of the thick film sensor chip 101, the protective shell 203 is used for protecting the thick film sensor chip 101, a plurality of first threaded holes 204 are arranged on the top of the protective shell 203, the first threaded holes 204 are used for fixing the first bolts 205, each first threaded hole 204 penetrates the protective shell 203 and is embedded on the connecting plate 104, the first threaded hole 204 is provided with the first bolt 205, the first bolt 205 penetrates the first threaded hole 204 on the protective shell 203 and enters the first threaded hole 204 on the connecting plate 104, so that the protective shell is connected with the connecting plate 104.

[0030] The effect is that the connecting plate 104 is used for fixedly supporting the thick film sensor chip 101 and the protective shell 203, the opening 105 on the connecting plate 104 is used for making the oil contact the detection end on the thick film sensor chip 101, and the first bolt 205 is used for fixing the protective shell 203 and the connecting plate 104, so as to strengthen the fastening of the thick film sensor chip 101.

[0031] As shown in Figure 1 , 2 , 3, 4: the top of the tube shell 100 is detachably provided with a sealing plate 106, and the sealing plate 106 is fixed by bolt connection with the top of the tube shell 100.

[0032] The effect is that the sealing plate 106 is used to seal the top of the tube housing 100, and the thick film sensor chip 101 can be easily replaced when maintenance is required.

[0033] As shown in the figure: a threaded sealing joint 107 is provided on one side of the signal processing circuit component 102. The threaded sealing joint 107 is used to prevent dust from entering the wires connected to the signal processing circuit. The threaded sealing joint 107 is connected to the tube housing 100 through a threaded seal. A wire threading tube 108 is provided at the end of the threaded sealing joint 107 away from the tube housing 100. The wire threading tube 108 and the threaded sealing joint 107 can be connected by socket connection or sleeve connection and then connected using electrical tape.

[0034] The effect is as follows: the threaded sealing joint 107 is used to prevent dust from entering the wires connected to the signal processing circuit, the wire threading tube 108 is used to connect the threaded sealing joint 107 and the tube housing 100, and the wire threading tube 108 is used to thread the wires.

[0035] like Figure 2 、 3 , 4, 5: The baffle 303 is fixed to the inner wall of the movable sleeve 300 by hot melting, and a plurality of filter holes 304 are provided on the surface of the baffle 303. The filter holes 304 are used for the oil to enter the filter ball layer 302. The second filter assembly 400 includes a second filter plate 401 that fits the inner wall of the movable sleeve 300. The second filter plate 401 is used to filter the oil entering the tube housing 100, thereby reducing the impurities in the oil entering the tube housing 100. A positioning ring 402 is provided below the second filter plate 401. The positioning ring 402 is used to receive the second filter plate 401. A connecting ring 403 is provided above the second filter plate 401. The connecting ring 403 is used to fix The second filter plate 401 is connected to the second filter plate 401, thereby strengthening the connection between the second filter plate 401 and the positioning ring 402. A plurality of second threaded holes 404 are provided on the top of the connecting ring 403. The second threaded holes 404 are used to install second bolts 405. Each second threaded hole 404 passes through the second filter plate 401 and is embedded in the positioning ring 402. A second bolt 405 is provided in the second threaded hole 404. The second bolt 405 passes through the second threaded hole 404 on the connecting ring 403 and the second threaded hole 404 on the second filter plate 401 and is connected to the second threaded hole 404 on the positioning ring 402, so that the connecting ring 403 is connected to the positioning ring 402 with the second filter plate 401.

[0036] The effect is: the second filter plate 401 is used to filter the oil entering the tube housing 100, thereby reducing the impurities in the oil entering the tube housing 100, and the second bolt 405 can enable the connecting ring 403 to clamp the second filter plate 401 and connect it to the positioning ring 402, thereby facilitating the subsequent maintenance or replacement of the second filter plate 401.

[0037] Working principle: the outer thread of the upper end of the movable sleeve 300 is connected with the inner thread 103 of the lower end of the pipe shell 100, so that the movable sleeve 300 is sealingly connected with the pipe shell 100, then the outer thread 301 of the lower end of the movable sleeve 300 is installed on the threaded interface of the main oil circuit to be detected, the oil enters the pipe shell 100 through the movable sleeve 300, is filtered once by the second filter plate 401, and is filtered twice by the first filter plate 201, so that the precision of the oil pressure sensor in detecting the oil pressure is stabilized, when the movable sleeve 300 is blocked, the outer thread 301 is separated from the inner thread 103, then the second bolt 405 is disassembled to separate the connecting ring 403 from the second filter plate 401, so that the second filter plate 401 is taken out, the filter balls in the filter ball layer 302 are taken out in reverse buckling, the filter balls are replaced, the time for the first filter assembly 200 to be blocked is delayed, and the service life of the component is prolonged.

[0038] In addition, it should be further pointed out that, in the description of the present application, unless otherwise specified and limited, the terms "mounting", "connecting" and "connecting" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected, it can be mechanically connected, or it can be electrically connected, it can be directly connected, or it can be indirectly connected through an intermediate medium, and it can be the communication between two elements. For those skilled in the art, the specific meaning of the above-mentioned terms in the present application can be understood according to the specific circumstances.

[0039] The above is the preferred embodiment of the present application, and it should be pointed out that, for ordinary skilled in the art, without departing from the principles of the present application, a number of improvements and refinements can be made, and these improvements and refinements should also be considered as the protection scope of the present application.

Claims

1. An automotive pressure sensor, comprising a thick film sensor chip (101) mounted on the upper portion of a tubular housing (100), and a signal processing circuit assembly (102) disposed on the thick film sensor chip (101), characterized in that: An internal thread (103) is provided at the lower end of the tube shell (100), and a plurality of first filter assemblies (200) are provided on the upper portion of the internal thread (103). A movable sleeve (300) is provided at the lower portion of the tube shell (100), and an external thread (301) is provided at both the upper and lower ends of the movable sleeve (300). A filter ball layer (302) is provided in the middle portion of the movable sleeve (300), a baffle (303) is provided at the lower portion of the filter ball layer (302), and a second filter assembly (400) is detachably provided on the upper portion of the filter ball layer (302).

2. The automotive pressure sensor according to claim 1, wherein: Each of the first filter components (200) comprises a first filter plate (201) fitted with the inner wall of the tube housing (100), and a positioning ring (202) is provided on both the upper and lower surfaces of the first filter plate (201), and the positioning ring (202) is connected to the inner wall of the tube housing (100) by heat melting.

3. The automotive pressure sensor according to claim 2, wherein: A connecting plate (104) is provided between the thick film sensor chip (101) and the first filter assembly (200), and an opening (105) is provided through the middle of the connecting plate (104).

4. The automotive pressure sensor according to claim 3, wherein: A protective shell (203) is provided on the surface of the thick film sensor chip (101), and a plurality of first threaded holes (204) are provided on the top of the protective shell (203). Each of the first threaded holes (204) passes through the protective shell (203) and is embedded in the connecting plate (104). A first bolt (205) is provided in the first threaded hole (204).

5. The automotive pressure sensor according to claim 4, wherein: A sealing plate (106) is detachably provided on the top of the tube housing (100).

6. The automotive pressure sensor according to claim 5, characterized in that: A threaded sealing joint (107) is provided on one side of the signal processing circuit assembly (102), the threaded sealing joint (107) is connected to the tube housing (100), and a threading tube (108) is provided at the end of the threaded sealing joint (107) away from the tube housing (100).

7. The automotive pressure sensor according to claim 6, wherein: The baffle (303) is fixed to the inner wall of the movable sleeve (300) by hot melting, and a plurality of filtering holes (304) are provided on the surface of the baffle (303).

8. The automotive pressure sensor according to claim 7, wherein: The second filter assembly (400) includes a second filter plate (401) that fits with the inner wall of the movable sleeve (300), a positioning ring (402) is provided below the second filter plate (401), a connecting ring (403) is provided above the second filter plate (401), and a plurality of second threaded holes (404) are provided on the top of the connecting ring (403), each of the second threaded holes (404) passes through the second filter plate (401) and is embedded in the positioning ring (402), and a second bolt (405) is provided in the second threaded hole (404).

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