Automobile engine oil pressure sensor with good sealing effect

Abstract

The utility model relates to the technical field of engine oil pressure sensors, and discloses an automobile engine oil pressure sensor with a good sealing effect, which comprises a threaded rod, a sensor main body, a sensor shell, a rubber sleeve and a sensor terminal, the bottom end of the threaded rod is integrally connected with the top end of the sensor shell, the side face of the sensor shell is fixedly connected with the interior of a rubber sleeve, the bottom end of the rubber sleeve is fixedly connected with the top end of a sensor terminal, and the side face of the sensor body is fixedly connected with the interior of the sensor shell. The sensor shell comprises a supporting shell and a gasket, the gasket is arranged at the top end of the supporting shell, and the gasket is made of a material with low hardness, so that the gasket can be extruded to deform during tightening, a gap between a threaded rod and an engine is filled, and a perfect sealing effect is achieved; and the sealing performance of the sensor is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of oil pressure sensors, and more specifically to an automotive oil pressure sensor with good sealing effect. Background Art

[0002] In a complex automotive electronic control system, the oil pressure sensor is an indispensable key component. It is responsible for real-time monitoring of the oil pressure inside the generator to ensure that the engine lubrication system is in the best working condition. This oil pressure sensor is based on a strain-type pressure sensor and uses the piezoresistive effect of thick-film resistors to achieve pressure measurement. When the oil pressure acts on the elastic diaphragm inside the sensor, the diaphragm produces a small deformation, which in turn drives the thick-film resistors attached to the diaphragm to undergo strain, resulting in a change in the resistance value. This resistance change is converted into an electrical signal and transmitted to the engine control unit. The control unit adjusts the operating state of the engine based on the received electrical signal to ensure the normal operation of the lubrication system. Compared with automotive air-conditioning sensors, oil pressure sensors focus more on monitoring the lubrication state of internal mechanical components of the engine. The air-conditioning sensor is mainly responsible for detecting the temperature and humidity inside the vehicle and providing control signals for the air-conditioning system to achieve the adjustment of the internal environment of the vehicle. In addition, although the functions and roles of the oil pressure sensor and the temperature sensor are different, they are interrelated and complementary in the engine management system. The temperature sensor is responsible for monitoring the temperature of the engine coolant to ensure that the engine operates within an appropriate temperature range. The two together provide comprehensive monitoring and protection for the engine to ensure the safe and efficient operation of the engine.

[0003] Deficiencies of the prior art: Some existing automotive oil pressure sensors have poor sealing effects, and there may be oil leakage at the connection between the sensor and the engine or at the connection of the sensor's own parts, which cannot well meet people's usage requirements. Summary of the Utility Model

[0004] In order to overcome the above-mentioned defects of the prior art, the utility model provides an automotive oil pressure sensor with good sealing effect to solve the problems existing in the above-mentioned background art.

[0005] To achieve the above object, the present utility model provides the following technical solution: An automotive oil pressure sensor with good sealing effect, including a threaded rod, further including: a sensor body, a sensor housing, a rubber sleeve, and a sensor terminal. The bottom end of the threaded rod is fixedly connected to the top end of the sensor body, and the bottom end of the threaded rod is integrally connected to the top end of the sensor housing. The side surface of the sensor housing is fixedly connected to the inside of the rubber sleeve, and the bottom end of the rubber sleeve is fixedly connected to the top end of the sensor terminal. The side surface of the sensor body is fixedly connected to the inside of the sensor housing. The external shape of the sensor housing is a hexagonal short column, and the sensor housing includes a support shell and a washer. A washer is provided at the top end of the support shell.

[0006] Further, a vertically penetrating hole is provided inside the threaded rod, and a sealing ring is fixedly connected to the bottom of the side surface of the threaded rod.

[0007] Further, the bottom end of the sealing ring is fixedly connected to the top end of a steel ring, the bottom end of the steel ring is fixedly connected to the top end of an elastic diaphragm, the bottom end of the elastic diaphragm is fixedly connected to the top end of an oil sump, and the bottom end of the oil sump is fixedly connected to the top end of a thick film resistor.

[0008] Further, the bottom of the side surface of the threaded rod is integrally connected to the top end of the support shell, and the hole provided at the top end of the support shell and the through hole of the threaded rod are on the same central axis.

[0009] Further, a rubber sleeve is provided on the outer surface of the support shell, and the external shape of the rubber sleeve is designed as an octagon.

[0010] Further, the bottom end of the rubber sleeve is fixedly connected to the top end of an insulating shell, and the inside of the insulating shell is fixedly connected to the side surface of a signal terminal.

[0011] The technical effects and advantages of the present utility model:

[0012] 1. By providing a sensor housing integrally connected to the threaded rod, the present utility model reduces the connection gaps of the sensor itself and reduces the connection points where oil leakage may occur, which is beneficial to improving the sealing performance of the device.

[0013] 2. By providing a washer at the top end of the support shell, and the washer is made of a material with a lower hardness to ensure that it can be squeezed and deformed when tightened, filling the gap between the threaded rod and the engine, achieving a perfect sealing effect, which is beneficial to improving the sealing performance of the sensor. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is a schematic diagram of the overall structure of the present utility model;

[0015] Figure 2 is a schematic diagram of the structure of the sensor body of the present utility model;

[0016] Figure 3 This is a schematic structural diagram of the cross-section of the sensor housing of the present utility model;

[0017] Figure 4 This is a schematic structural diagram of the sensor terminal of the present utility model.

[0018] The reference numerals are: 1, threaded rod; 2, sensor main body; 201, sealing ring; 202, steel ring; 203, elastic diaphragm; 204, oil sump; 205, thick film resistor; 3, sensor housing; 301, support shell; 302, washer; 4, rubber sleeve; 5, sensor terminal; 501, insulating shell; 502, signal terminal. Specific embodiments

[0019] Next, the technical solutions in the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the present utility model. In addition, the forms of each structure described in the following embodiments are merely examples, and an automotive oil pressure sensor with good sealing effect involved in the present utility model is not limited to the structures described in the following embodiments. All other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present utility model.

[0020] Referring to Figures 1 to 4 , the present utility model provides an automotive oil pressure sensor with good sealing effect, including a threaded rod 1, and further including: a sensor main body 2, a sensor housing 3, a rubber sleeve 4, and a sensor terminal 5. The bottom end of the threaded rod 1 is fixedly connected to the top end of the sensor main body 2, the bottom end of the threaded rod 1 is integrally connected to the top end of the sensor housing 3, the side surface of the sensor housing 3 is fixedly connected to the inside of the rubber sleeve 4, the bottom end of the rubber sleeve 4 is fixedly connected to the top end of the sensor terminal 5, the side surface of the sensor main body 2 is fixedly connected to the inside of the sensor housing 3. The external shape of the sensor housing 3 is a hexagonal short column, which is convenient for installation and disassembly. The sensor housing 3 includes a support shell 301 and a washer 302. A washer 302 is provided at the top end of the support shell 301. The washer 302 is made of a material with a lower hardness to ensure that it can be squeezed and deformed when tightened to fill the gap between the threaded rod 1 and the engine.

[0021] Among them, a vertically penetrating hole is opened inside the threaded rod 1, and a sealing ring 201 is fixedly connected to the bottom of the side surface of the threaded rod 1. The sealing ring 201 is used to fill the gap between the threaded rod 1 and the steel ring 202.

[0022] Among them, the bottom end of the sealing ring 201 is fixedly connected to the top end of the steel ring 202, the bottom end of the steel ring 202 is fixedly connected to the top end of the elastic diaphragm 203, the bottom end of the elastic diaphragm 203 is fixedly connected to the top end of the oil sump 204, the bottom end of the oil sump 204 is fixedly connected to the top end of the thick film resistor 205. The engine oil flows into the sensor body 2 through the threaded rod 1 and converges in the oil sump 204 to form a stable oil pressure environment. The engine oil pressure acts on the elastic diaphragm 203, causing the elastic diaphragm 203 to undergo a small deformation, which in turn drives the thick film resistor 205 to undergo strain, resulting in a change in the resistance value.

[0023] Among them, the bottom side of the threaded rod 1 is integrally connected to the top end of the support shell 301, and the hole opened at the top end of the support shell 301 and the through hole of the threaded rod 1 are on the same central axis, facilitating the engine oil to enter the sensor through the channel.

[0024] Among them, a rubber sleeve 4 is arranged on the outer surface of the support shell 301. The outer shape of the rubber sleeve 4 is designed as an octagon. The rubber material has good sealing performance, reducing the possibility of oil leakage at the joints of the sensor itself parts.

[0025] Among them, the bottom end of the rubber sleeve 4 is fixedly connected to the top end of the insulating shell 501, and the inside of the insulating shell 501 is fixedly connected to the side of the signal terminal 502. The electrical signal generated by the change in the resistance value is sent out by the signal terminal 502.

[0026] Working principle of the utility model: The utility model includes a threaded rod 1, and also includes: a sensor body 2, a sensor housing 3, a rubber sleeve 4, and a sensor terminal 5. The bottom end of the threaded rod 1 is fixedly connected to the top end of the sensor body 2, and the bottom end of the threaded rod 1 is integrally connected to the top end of the sensor housing 3. The side of the sensor housing 3 is fixedly connected to the inside of the rubber sleeve 4, and the bottom end of the rubber sleeve 4 is fixedly connected to the top end of the sensor terminal 5. A hole that runs through from top to bottom is provided inside the threaded rod 1. The bottom of the side of the threaded rod 1 is integrally connected to the top end of the support shell 301, and the hole provided at the top end of the support shell 301 and the through hole of the threaded rod 1 are on the same central axis, facilitating the oil to enter the sensor through the channel. A sealing ring 201 is fixedly connected to the bottom of the side of the threaded rod 1. The bottom end of the sealing ring 201 is fixedly connected to the top end of the steel ring 202. The sealing ring 201 is used to fill the gap between the threaded rod 1 and the steel ring 202. The bottom end of the steel ring 202 is fixedly connected to the top end of the elastic diaphragm 203. The bottom end of the elastic diaphragm 203 is fixedly connected to the top end of the oil sump 204. The bottom end of the oil sump 204 is fixedly connected to the top end of the thick film resistor 205. The oil flows into the sensor body 2 through the threaded rod 1 and converges in the oil sump 204 to form a stable oil pressure environment. The oil pressure acts on the elastic diaphragm 203, causing the elastic diaphragm 203 to undergo a small deformation, which in turn drives the thick film resistor 205 to undergo strain, resulting in a change in the resistance value. The side of the sensor body 2 is fixedly connected to the inside of the sensor housing 3. The external shape of the sensor housing 3 is a hexagonal short column, which is convenient for installation and disassembly. The sensor housing 3 includes a support shell 301 and a washer 302. A washer 302 is provided at the top end of the support shell 301. The washer 302 is made of a material with a lower hardness to ensure that it can be squeezed and deformed when tightened to fill the gap between the threaded rod 1 and the engine. The outer surface of the support shell 301 is provided with a rubber sleeve 4. The external shape of the rubber sleeve 4 is designed as an octagon. The rubber material has good sealing performance, reducing the possibility of oil leakage at the connection of the parts of the sensor itself. The bottom end of the rubber sleeve 4 is fixedly connected to the top end of the insulating shell 501. The inside of the insulating shell 501 is fixedly connected to the side of the signal terminal 502. The electrical signal generated by the change in the resistance value is sent by the signal terminal 502 to the control unit of the engine, and the control unit then adjusts the operating state of the engine according to the received signal.

[0027] The above are only the preferred embodiments of the utility model and are not used to limit the utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. An automobile oil pressure sensor with good sealing effect, comprising a threaded rod (1), characterized in that: Also includes: A sensor body (2), a sensor housing (3), a rubber sleeve (4), and a sensor terminal (5), wherein the bottom end of the threaded rod (1) is fixedly connected to the top end of the sensor body (2), the bottom end of the threaded rod (1) is integrally connected to the top end of the sensor housing (3), the side of the sensor housing (3) is fixedly connected to the inside of the rubber sleeve (4), the bottom end of the rubber sleeve (4) is fixedly connected to the top end of the sensor terminal (5), the side of the sensor body (2) is fixedly connected to the inside of the sensor housing (3), the outer shape of the sensor housing (3) is a hexagonal short column, and the sensor housing (3) comprises a support shell (301) and a gasket (302), and the top end of the support shell (301) is provided with a gasket (302).

2. The automotive oil pressure sensor with good sealing effect according to claim 1, characterized in that: A hole is provided inside the threaded rod (1) and passes through it from top to bottom. A sealing ring (201) is fixedly connected to the bottom of the side surface of the threaded rod (1).

3. The automotive oil pressure sensor with good sealing effect according to claim 2, characterized in that: The bottom end of the sealing ring (201) is fixedly connected to the top end of the steel ring (202), the bottom end of the steel ring (202) is fixedly connected to the top end of the elastic diaphragm (203), the bottom end of the elastic diaphragm (203) is fixedly connected to the top end of the oil bin (204), and the bottom end of the oil bin (204) is fixedly connected to the top end of the thick film resistor (205).

4. The automotive oil pressure sensor with good sealing effect according to claim 3 is characterized in that: The bottom of the side surface of the threaded rod (1) is integrally connected to the top of the supporting shell (301), and the hole opened at the top of the supporting shell (301) and the through hole of the threaded rod (1) are on the same central axis.

5. The automotive oil pressure sensor with good sealing effect according to claim 4, characterized in that: The outer surface of the support shell (301) is provided with a rubber sleeve (4), and the outer shape of the rubber sleeve (4) is designed to be octagonal.

6. The automotive oil pressure sensor with good sealing effect according to claim 5, characterized in that: The bottom end of the rubber sleeve (4) is fixedly connected to the top end of the insulating shell (501), and the inside of the insulating shell (501) is fixedly connected to the side of the signal terminal (502).

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