A high-intake-volume dual-layer card oxygen sensor

Abstract

The present invention discloses a double-layer clamped oxygen sensor with a large air intake, comprising a hexagonal nut threaded mounting part, a steel protective cover, an outer clamped steel cover, an oxygen sensor chip, a positioning ceramic part, an insulating heat-insulating part, a high-temperature resistant connecting harness, an air intake double shield and a double-layer clamped part, wherein the front end of the steel protective cover is welded to the rear side of the hexagonal nut threaded mounting part, and the rear end of the air intake double shield is welded to the front side of the hexagonal nut threaded mounting part. In the present invention, the air intake double shield can increase the air intake of the exhaust gas to be detected at the front end of the oxygen sensor, improve the detection accuracy of the oxygen sensor, and at the same time avoid the exhaust gas to be detected from directly contacting the oxygen sensor chip at the front end of the oxygen sensor, and prevent the corrosive substances in the exhaust gas to be detected from corroding the oxygen sensor chip. The double-layer clamped part can ensure that the oxygen sensor is firmly connected to the connecting end of the automobile computer, and avoid vibration during vehicle driving, which causes the connecting end of the oxygen sensor to the automobile computer to loosen or fall off.

Description

Technical Field

[0001] The invention relates to the field of a double-layer clip-on oxygen sensor with a large air intake volume, and in particular belongs to a double-layer clip-on oxygen sensor with a large air intake volume. Background Art

[0002] The oxygen sensor is a chip based on the electrochemical principle. It detects the oxygen ion components in the exhaust gas to detect the concentration and dilution of the oxygen content in the exhaust gas, and then detects and controls the fuel ratio in the engine. The oxygen sensor transmits the relevant data detected to the car computer for analysis and processing, so as to achieve the control of the optimal air-fuel ratio of the car engine and achieve the purpose of energy saving, consumption reduction and environmental protection. The following problems exist in the actual use of ordinary oxygen sensors: 1. The air inlet hole on the ordinary oxygen sensor protective cover is small. The exhaust gas generated by the car during operation enters the oxygen sensor and contacts the oxygen sensor chip less, resulting in a decrease in the detection sensitivity of the oxygen sensor chip, and cannot accurately detect the concentration and dilution of the oxygen content in the exhaust gas; 2. The ordinary oxygen sensor has only one layer of protective cover. After the exhaust gas generated by the car during operation enters the protective cover, it directly contacts the oxygen sensor chip. The corrosive substances contained in the exhaust gas are easy to corrode the oxygen sensor chip, affecting the service life of the oxygen sensor; 3. The ordinary oxygen sensor is connected to the car computer by a simple single-layer card connection. The vibration of the car during operation can easily loosen or fall off the oxygen sensor and the car computer connection, resulting in the car computer being unable to receive the data transmitted by the oxygen sensor. To this end, the present invention provides a double-layer card-connected oxygen sensor with a large air intake volume. Summary of the invention

[0003] The present invention provides a double-layer clamped oxygen sensor with a large air intake volume. The problems mentioned in the above-mentioned background technology are solved by the overall research and development design of the hexagonal nut threaded mounting part, the steel protective cover, the outer clamp steel cover, the oxygen sensor chip, the positioning ceramic part, the insulating and heat-insulating part, the high-temperature resistant connecting harness, the air intake double shield and the double-layer clamping part. At the same time, the air intake double shield in the present invention can increase the air intake volume of the exhaust gas to be detected at the front end of the oxygen sensor, improve the detection accuracy of the oxygen sensor, and at the same time avoid the exhaust gas to be detected from directly contacting the oxygen sensor chip at the front end of the oxygen sensor, and prevent the corrosive substances in the exhaust gas to be detected from corroding the oxygen sensor chip. The double-layer clamping part can ensure that the oxygen sensor is firmly connected to the connecting end of the car computer, and avoid the vibration of the vehicle during driving, which causes the connecting end of the oxygen sensor to the car computer to loosen or fall off.

[0004] The technical solution adopted by the present invention is as follows:

[0005] A double-layer clamped oxygen sensor with a large air intake volume comprises a hexagonal nut threaded mounting part, a steel protective sleeve, an outer clamping steel sleeve, an oxygen sensor chip, a positioning ceramic part, an insulating heat-insulating part, a high-temperature resistant connecting harness, an air intake double shield and a double-layer clamping part, wherein the front end of the steel protective sleeve is welded to the rear side of the hexagonal nut threaded mounting part, the insulating heat-insulating part is mounted on the inner side of the rear end of the steel protective sleeve, the outer clamping steel sleeve is sleeved on the outer side of the rear end of the steel protective sleeve, the positioning ceramic part is sleeved on the outer side of the middle area of ​​the oxygen sensor chip, the oxygen sensor chip and the positioning ceramic part are integrally mounted in the hexagonal nut threaded mounting part and in the hollow area inside the steel protective sleeve, the front sensing end of the oxygen sensor chip extends outward from the hexagonal nut threaded mounting part, the rear electrode end of the oxygen sensor chip is close to the front end of the insulating heat-insulating part, one end of the high-temperature resistant connecting harness passes through the insulating heat-insulating part and is in close contact with the electrode end of the oxygen sensor chip, the other end of the high-temperature resistant connecting harness is connected to the double-layer clamping part, the rear end of the air intake double shield is welded to the front side of the hexagonal nut threaded mounting part, and the characterised in that the air intake double shield comprises an outer air intake protective cover and an inner air intake protective cover The inner air intake protective cover is installed on the inner side of the outer air intake protective cover, the front end of the inner air intake protective cover extends out of the front end of the outer air intake protective cover, the rear end of the inner air intake protective cover is welded to the inner rear end of the outer air intake protective cover, the outer air intake protective cover is a hollow cylinder as a whole, the front end of the outer air intake protective cover is equidistantly distributed with inverted triangular faces, the inverted ends of the inverted triangular faces are arc-shaped, the double-layer clamping part has an embedded clamping body and an outer clamping body, the embedded clamping body and the outer clamping body are connected as a whole, the outer lower side of the embedded clamping body is There are guide convex strips on the side, and two connecting protrusions are respectively arranged on the left and right sides of the outer side of the embedded card body, and a limiting protrusion is respectively arranged on the upper and lower sides of the outer side of the external card card body, and the two limiting protrusions are symmetrically distributed on the upper and lower sides of the external card card body along the transverse center plane of the external card card body, and a card assembly is respectively arranged on the left and right sides of the outer side of the external card card body, and the two card assemblies are symmetrically distributed on the left and right sides of the external card card body along the longitudinal center plane of the external card card body, and the two limiting protrusions and the two card assemblies are connected to the external card card body as a whole.

[0006] Preferably, the card-connecting assembly comprises an external card frame body and a rocker pressure body, the external card frame body is located at the rear end of the side of the external card card-connecting body, the rocker pressure body is located in the middle area of ​​the side of the external card card-connecting body, one side of the rocker pressure body is connected to the external card card-connecting body, and the other side of the rocker pressure body that is not connected to the external card card-connecting body is located inside the external card frame body.

[0007] Preferably, the curvature of the inverted end of the inverted triangular surface at the front end of the outer air intake protection cover is equal to the curvature of the outer side surface of the inner air intake protection cover, and the outer air intake notches are formed between adjacent inverted triangular surfaces.

[0008] Preferably, the rear end of the inner air intake protective cover has an annular protrusion, the outer diameter of the annular protrusion matches the inner diameter of the outer air intake protective cover, the inner air intake protective cover is welded to the inner side of the outer air intake protective cover through the annular protrusion, and the inner air intake port is distributed in a ring on the front side of the annular protrusion at the rear end of the inner air intake protective cover.

[0009] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0010] A large air intake double-layer clamping oxygen sensor is manufactured by optimizing the overall design combination of hexagonal nut threaded mounting parts, steel protective sleeves, outer clamping steel sleeves, oxygen sensor chips, positioning ceramic parts, insulating and heat-insulating parts, high-temperature resistant connecting harnesses, air intake double shields and double-layer clamping parts. The following problems of ordinary oxygen sensors in actual use are solved: 1. The air intake hole on the ordinary oxygen sensor protective cover is small, and the exhaust gas generated by the car during operation enters the oxygen sensor and contacts the oxygen sensor chip less, resulting in reduced detection sensitivity of the oxygen sensor chip, and the degree of oxygen concentration and dilution in the exhaust gas cannot be accurately detected; 2. The ordinary oxygen sensor has only one layer of protective cover. After the exhaust gas generated by the car during operation enters the protective cover, it directly contacts the oxygen sensor chip. The corrosive substances contained in the exhaust gas are easy to corrode the oxygen sensor chip, affecting the service life of the oxygen sensor; 3. The ordinary oxygen sensor is connected to the car computer connection end by a simple single-layer clamping method. The vibration of the car during operation can easily loosen or fall off the oxygen sensor and the car computer connection end, resulting in the car computer being unable to receive the data transmitted by the oxygen sensor.

[0011] The double air intake shield in the present invention can increase the intake amount of exhaust gas to be detected at the front end of the oxygen sensor, improve the detection accuracy of the oxygen sensor, and at the same time prevent the exhaust gas to be detected from directly contacting the oxygen sensor chip at the front end of the oxygen sensor, and prevent the corrosive substances in the exhaust gas to be detected from corroding the oxygen sensor chip. The double-layer clamping part can ensure that the oxygen sensor is firmly connected to the connecting end of the automobile computer, and avoid vibration during vehicle driving, which may cause the connecting end of the oxygen sensor to the automobile computer to loosen or fall off. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0013] Figure 2 It is a schematic diagram of the assembly of the double air intake shields in the present invention;

[0014] Figure 3 It is a schematic diagram of a double-layer clamping piece in the present invention. DETAILED DESCRIPTION

[0015] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of invention protection.

[0016] The present invention is further described in detail below with reference to examples and specific implementation modes.

[0017] See the attached figure: a large air intake double-layer card-connected oxygen sensor, including a hexagonal nut threaded mounting part 2, a steel protective sleeve 3, an outer card steel sleeve 4, an oxygen sensor chip, a positioning ceramic part, an insulating heat-insulating part, a high-temperature resistant connecting harness 5, an air intake double shield 1 and a double-layer card connector 6. The front end of the steel protective sleeve 3 is welded to the rear side of the hexagonal nut threaded mounting part 2, the insulating heat-insulating part is installed on the inner side of the rear end of the steel protective sleeve 3, the outer card steel sleeve 4 is sleeved on the outer side of the rear end of the steel protective sleeve 3, the positioning ceramic part is sleeved on the outer side of the middle area of ​​the oxygen sensor chip, and the oxygen sensor chip and the positioning ceramic part are integrally installed on the hexagonal nut threaded mounting part 2 and the steel part In the hollow area inside the protective sleeve 3, the front sensing end of the oxygen sensor chip extends outward from the outside of the hexagonal nut threaded mounting piece 2, the rear electrode end of the oxygen sensor chip is close to the front end of the insulating heat insulation piece, one end of the high temperature resistant connecting harness 5 passes through the insulating heat insulation piece and is in close contact with the electrode end of the oxygen sensor chip, and the other end of the high temperature resistant connecting harness is connected to the double-layer clamping piece 6, and the rear end of the air intake double shield 1 is welded to the front side of the hexagonal nut threaded mounting piece 2, characterized in that the air intake double shield 1 has an outer air intake protective shield 101 and an inner air intake protective shield 102, the inner air intake protective shield 102 is installed on the inner side of the outer air intake protective shield 101, and the inner air intake The front end of the protective cover 102 extends out of the front end of the outer air intake protective cover 101, and the rear end of the inner air intake protective cover 102 is welded to the inner rear end of the outer air intake protective cover 101. The outer air intake protective cover 101 is a hollow cylinder as a whole. The front end of the outer air intake protective cover 101 is evenly distributed with inverted triangular faces 1011, and the inverted ends of the inverted triangular faces 1011 are arc-shaped. The double-layer clamping part 6 has an embedded clamping body 602 and an outer clamping body 601. The embedded clamping body 602 and the outer clamping body 601 are connected as a whole. The outer lower side of the embedded clamping body 602 has a guide convex strip 604, and the embedded clamping body There are two connecting protrusions 603 on the left and right sides of the outer side of 602, and there are two limiting protrusions 605 on the upper and lower sides of the outer side of the external card card body 601. The two limiting protrusions 605 are symmetrically distributed on the upper and lower sides of the external card card body 601 along the horizontal center plane of the external card card body 601. There is a clamping component 606 on the left and right sides of the outer side of the external card card body 601, and the two clamping components 606 are symmetrically distributed on the left and right sides of the external card card body 601 along the longitudinal center plane of the external card card body 601. The two limiting protrusions 605 and the two clamping components 606 are connected to the external card card body 601 as a whole.

[0018] Preferably, the card assembly 606 has an external card frame body 6061 and a rocker pressure body 6062, the external card frame body 6061 is located at the rear end of the side of the external card card body 601, the rocker pressure body 6062 is located in the middle area of ​​the side of the external card card body 601, one side of the rocker pressure body 6062 is connected to the external card card body 601, and the other side of the rocker pressure body 6062 that is not connected to the external card card body 601 is located on the inner side of the external card frame body 6061.

[0019] Preferably, the curvature of the inverted end arc of the inverted triangular face 1011 at the front end of the outer air intake protective cover 101 is equal to the curvature of the outer side surface of the inner air intake protective cover 102 , and the outer air intake notches 1012 are between adjacent inverted triangular face 1011 .

[0020] Preferably, the rear end of the inner air intake protective cover 102 has an annular protrusion 1021, the outer diameter of the annular protrusion 1021 matches the inner diameter of the outer air intake protective cover 101, the inner air intake protective cover 102 is welded to the inner side of the outer air intake protective cover 101 through the annular protrusion 1021, and the inner air intake port 1022 is distributed in a ring on the front side of the annular protrusion 1021 at the rear end of the inner air intake protective cover 102.

[0021] When in use: install the oxygen sensor at the corresponding position of the automobile engine, and the embedded card body 602 in the double-layer card connector 6 is embedded into the inner side of the automobile computer terminal under the guidance of the guide convex strip 604, ensuring that the four connecting protrusions 603 on the left and right sides of the outer side of the embedded card body 602 in the double-layer card connector 6 are embedded in the corresponding position of the automobile computer terminal. At the same time, ensure that the corresponding position of the automobile computer terminal is clamped between the outer card frame 6061 and the rocker pressing body 6062 in the outer card connector 601, ensuring that the double-layer card connector 6 is firmly connected to the automobile computer terminal; the exhaust gas generated by the automobile during operation is passed through The exhaust gas passes through the outer air intake slot 1012 between the adjacent inward-turned triangular faces 1011 at the front end of the outer air intake protective cover 101, enters the area between the outer air intake protective cover 101 and the inner air intake protective cover 102, and then enters the interior of the oxygen sensor through the inner air intake port 1021 distributed in a ring shape at the rear end of the inner air intake protective cover 102, and contacts the oxygen sensor chip. The oxygen sensor chip detects the oxygen ion component in the exhaust gas, and transmits the detection signal to the vehicle computer for analysis and processing through the high-temperature resistant connecting harness 5. After analyzing and comparing the detection signal of the oxygen sensor, the vehicle computer adjusts the engine intake volume and fuel injection volume, thereby realizing the control of the optimal air-fuel ratio of the vehicle engine and making the engine reach the optimal working state.

[0022] The present invention solves the following problems that exist in the actual use of ordinary oxygen sensors: 1. The air inlet hole on the ordinary oxygen sensor protective cover is relatively small, and the exhaust gas generated when the car is working and running has a small amount of gas entering the oxygen sensor and contacting the oxygen sensor chip, resulting in reduced detection sensitivity of the oxygen sensor chip, and the inability to accurately detect the concentration and dilution of oxygen in the exhaust gas; 2. The ordinary oxygen sensor has only one layer of protective cover. After the exhaust gas generated when the car is working and running enters the protective cover, it directly contacts the oxygen sensor chip. The corrosive substances contained in the exhaust gas are likely to corrode the oxygen sensor chip, affecting the service life of the oxygen sensor; 3. The ordinary oxygen sensor is connected to the car computer connection end by a simple single-layer clamping method. The vibration of the car when working and running can easily make the oxygen sensor and the car computer connection end loose or fall off, resulting in the car computer being unable to receive data transmitted by the oxygen sensor.

[0023] The double air intake shield 1 in the present invention can increase the intake amount of exhaust gas to be detected at the front end of the oxygen sensor, improve the detection accuracy of the oxygen sensor, and at the same time prevent the exhaust gas to be detected from directly contacting the oxygen sensor chip at the front end of the oxygen sensor, and prevent the corrosive substances in the exhaust gas to be detected from corroding the oxygen sensor chip. The double-layer clamping part 6 can ensure that the oxygen sensor is firmly connected to the connecting end of the car computer, avoiding vibration during vehicle driving, which may cause the connecting end of the oxygen sensor to the car computer to loosen or fall off.

[0024] The above is only a preferred embodiment of the present invention. It should be pointed out that a person skilled in the art can make several modifications and improvements without departing from the inventive concept of the present invention, which all belong to the protection scope of the present invention.

Claims

1. A double-layer clamped oxygen sensor with a large air intake volume, comprising a hexagonal nut threaded mounting part, a steel protective sleeve, an outer clamping steel sleeve, an oxygen sensor chip, a positioning ceramic part, an insulating heat-insulating part, a high-temperature resistant connecting harness, an air intake double shield and a double-layer clamping part, wherein the front end of the steel protective sleeve is welded to the rear side of the hexagonal nut threaded mounting part, the insulating heat-insulating part is installed on the inner side of the rear end of the steel protective sleeve, the outer clamping steel sleeve is sleeved on the outer side of the rear end of the steel protective sleeve, the positioning ceramic part is sleeved on the outer side of the middle area of ​​the oxygen sensor chip, the oxygen sensor chip and the positioning ceramic part are integrally installed in the hexagonal nut threaded mounting part and in the hollow area inside the steel protective sleeve, the front sensing end of the oxygen sensor chip extends outward from the hexagonal nut threaded mounting part, the rear electrode end of the oxygen sensor chip is close to the front end of the insulating heat-insulating part, one end of the high-temperature resistant connecting harness passes through the insulating heat-insulating part and is in close contact with the electrode end of the oxygen sensor chip, the other end of the high-temperature resistant connecting harness is connected to the double-layer clamping part, and the rear end of the air intake double shield is welded to the front side of the hexagonal nut threaded mounting part, characterized in that The double air intake shield comprises an outer air intake shield and an inner air intake shield, the inner air intake shield is installed inside the outer air intake shield, the front end of the inner air intake shield extends out of the front end of the outer air intake shield, the rear end of the inner air intake shield is welded to the inner rear end of the outer air intake shield, the outer air intake shield is a hollow cylinder as a whole, the front end of the outer air intake shield is evenly distributed with inverted triangular faces, the inverted ends of the inverted triangular faces are arc-shaped, the double-layer clamping parts comprise an embedded clamping body and an outer clamping body, the embedded clamping body and the outer clamping body are connected as a whole , the lower side surface of the outer side of the embedded card body has a guide convex strip, the left and right sides of the outer side of the embedded card body have two connecting protrusions respectively, the upper and lower sides of the outer side of the external card card body each have a limiting protrusion, the two limiting protrusions are symmetrically distributed on the upper and lower sides of the external card card body along the transverse center plane of the external card card body, the left and right sides of the outer side of the external card card body each have a clamping component, the two clamping components are symmetrically distributed on the left and right sides of the external card card body along the longitudinal center plane of the external card card body, and the two limiting protrusions and the two clamping components are connected to the external card card body as a whole; The card-connecting assembly comprises an outer card frame body and a seesaw pressure body, the outer card frame body is located at the rear end of the side of the outer card card-connecting body, the seesaw pressure body is located in the middle area of ​​the side of the outer card card-connecting body, one side of the seesaw pressure body is connected to the outer card card-connecting body, and the other side of the seesaw pressure body which is not connected to the outer card card-connecting body is located inside the outer card frame body.

2. A large air intake double-layer card-connected oxygen sensor according to claim 1, characterized in that The curvature of the inverted end of the inverted triangular surface at the front end of the outer air intake protection cover is equal to the curvature of the outer side surface of the inner air intake protection cover, and the outer air intake notches are formed between adjacent inverted triangular surfaces.

3. A large air intake double-layer card-connected oxygen sensor according to claim 1, characterized in that The inner air intake protective cover has an annular protrusion at the rear end, the outer diameter of the annular protrusion matches the inner diameter of the outer air intake protective cover, the inner air intake protective cover is welded to the inner side of the outer air intake protective cover through the annular protrusion, and the inner air intake port is distributed in an annular manner in front of the annular protrusion at the rear end of the inner air intake protective cover.

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