CN111487371A - An oxygen sensor with good anti-interference performance - Google Patents

Abstract

The invention discloses an oxygen sensor with good anti-interference performance, which comprises a shell, wherein a flange is fixed on the outer wall of the top of the shell through bolts, an installation seat is fixed on the outer wall of the top of the flange through bolts, sleeves are fixed on the outer wall of the top of the installation seat through bolts, the outer walls of the sleeves are provided with ventilation openings distributed at equal intervals, a detection element is fixed on the outer wall of the top of the installation seat through bolts, a cleaning mechanism is sleeved on the outer wall of the detection element, screws are fixed on the outer wall of the top of the installation seat through bearings in the connection process, fixing lugs are screwed on the outer walls of the two screws, and the two fixing lugs are fixed on the cleaning mechanism through bolts. The motor drives the screw rod to rotate so as to drive the cleaning mechanism to reciprocate, so that the detection element is helped to clean impurities adhered to the surface, the cleaning mechanism is arranged in the cleaning mechanism, and the cleaning brush is driven by the matching between the electromagnet and the magnet so as to further help the detection element to clean.

Description

An oxygen sensor with good anti-interference performance

technical field

The invention relates to the technical field of oxygen sensors, in particular to an oxygen sensor with good anti-interference performance.

Background technique

Oxygen sensors are essential components in engines that use three-way catalytic converters to reduce exhaust pollution. Since the air-fuel ratio of the mixture deviates from the theoretical air-fuel ratio, the purification ability of the three-way catalyst for CO, HC and NOx will drop sharply, so an oxygen sensor is installed in the exhaust pipe to detect the oxygen concentration in the exhaust gas and send it to the exhaust pipe. The ECU sends a feedback signal, and then the ECU controls the increase or decrease of the fuel injection amount of the injector, thereby controlling the air-fuel ratio of the mixture to be near the theoretical value.

When the oxygen sensor detects the oxygen concentration in the exhaust gas, a large amount of impurities will adhere to the detection element. These impurities cover the surface of the detection element for a long time, which will interfere with the detection result.

SUMMARY OF THE INVENTION

Based on the technical problems existing in the background art, the present invention proposes an oxygen sensor with good anti-interference performance.

An oxygen sensor with good anti-interference performance proposed by the present invention includes a casing, the top outer wall of the casing is fixed with a flange by bolts, the top outer wall of the flange is fixed with a mounting seat by bolts, and the top outer wall of the mounting seat is fixed by bolts. Bolts are fixed with sleeves, the outer walls of the sleeves are all provided with air vents distributed at equal distances, the outer wall of the top of the mounting seat is fixed with a detection element by bolts, and the outer wall of the detection element is sleeved with a cleaning mechanism, the installation The connection process of the outer wall of the top of the seat is fixed with a screw through the bearing, the outer walls of the two screws are screwed with fixing ears, and the two fixing ears are fixed on the cleaning mechanism by bolts, and one end of the outer wall of the two screws passes through. A driven pulley is fixed with bolts, a motor is fixed on one inner wall of the mounting seat by bolts, and a driving pulley is fixed on the output shaft of the motor by bolts, and a belt is connected between the driving pulley and the driven pulley.

Preferably, the cleaning mechanism includes an installation sleeve, and the inner wall of the installation sleeve is fixed with the cleaning mechanism by bolts.

Preferably, the cleaning mechanism includes an installation box, and an outer wall of one side of the installation box is provided with a rectangular opening.

Preferably, an installation frame is movably connected to the inner wall of the rectangular opening, and a cleaning brush is fixed on one outer wall of the installation frame by bolts.

Preferably, a fixing sleeve is fixed on the inner wall of the bottom of the installation box by bolts, and the inner wall of the fixing sleeve is slidably connected with a pillar, the pillar is movably connected to the mounting frame, the inner wall of the bottom of the fixing sleeve is fixed with an electromagnet by bolts, and A magnet is fixed on the outer wall of the bottom of the pillar through bolts, and a spring is connected between the electromagnet and the magnet.

Preferably, both the electromagnet and the motor are connected with a switch through a wire, and the switch is connected with a power source through a wire.

In the present invention, a cleaning mechanism is arranged in the casing, and the motor drives the screw to rotate to drive the cleaning mechanism to reciprocate to help the detection element to clean the impurities adhering to the surface, and a cleaning mechanism is arranged in the cleaning mechanism to pass between the electromagnet and the magnet. The matching drive cleaning brush further helps the detection element to be cleaned.

Description of drawings

1 is a schematic structural diagram of an oxygen sensor with good anti-interference performance proposed by the present invention;

FIG. 2 is a schematic cross-sectional structural diagram of a casing of an oxygen sensor with good anti-interference performance proposed by the present invention;

3 is a schematic structural diagram of a cleaning mechanism for an oxygen sensor with good anti-interference performance proposed by the present invention;

FIG. 4 is a schematic structural diagram of a cleaning mechanism of an oxygen sensor with good anti-interference performance proposed by the present invention.

In the picture: 1 shell, 2 flange, 3 mounting seat, 4 casing, 5 vent, 6 detection element, 7 screw, 8 cleaning mechanism, 9 driven pulley, 10 motor, 11 belt, 12 installation sleeve, 13 fixed Ears, 14 cleaning mechanisms, 15 mounting boxes, 16 mounting brackets, 17 cleaning brushes, 18 fixing sleeves, 19 electromagnets, 20 springs, 21 pillars.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments.

Referring to Figure 1-4, an oxygen sensor with good anti-interference performance includes a housing 1, a flange 2 is fixed on the top outer wall of the housing 1 by bolts, a mounting seat 3 is fixed on the top outer wall of the flange 2 by bolts, and the top of the mounting seat 3 is fixed by bolts. The outer wall is fixed with a casing 4 by bolts, and the outer wall of the casing 4 is provided with air vents 5 distributed at equal distances. The outer wall of the top of the mounting seat 3 is fixed with a detection element 6 by bolts, and the outer wall of the detection element 6 is sleeved with a cleaning mechanism 8, During the connection process of the top outer wall of the mounting seat 3, the screw 7 is fixed by the bearing, the outer walls of the two screws 7 are screwed with the fixing ears 13, and the two fixing ears 13 are fixed on the cleaning mechanism 8 by bolts. The outer wall of one end is fixed with a driven pulley 9 by bolts, the inner wall of one side of the mounting seat 3 is fixed with a motor 10 by bolts, and a driving pulley is fixed on the output shaft of the motor 10 by bolts, and the driving pulley is connected with the driven pulley 9. There is a belt 11.

In the present invention, the cleaning mechanism 8 includes an installation sleeve 12, and the inner wall of the installation sleeve 12 is fixed with the cleaning mechanism 14 by bolts. The cleaning mechanism 14 includes an installation box 15, and an outer wall of one side of the installation box 15 is provided with a rectangular opening. An installation frame 16 is movably connected to the inner wall, and a cleaning brush 17 is fixed on one side of the outer wall of the installation frame 16 by bolts, and a fixing sleeve 18 is fixed on the inner wall of the bottom of the installation box 15 by bolts, and the inner wall of the fixing sleeve 18 is slidably connected with a pillar 21. 21 is movably connected to the mounting frame 16, the inner wall of the bottom of the fixing sleeve 18 is fixed with an electromagnet 19 by bolts, and the outer wall of the bottom of the pillar 21 is fixed with a magnet by bolts, and a spring 20 is connected between the electromagnet 19 and the magnet, and the electromagnet 19 and the motor are connected 10 are all connected with switches through wires, and the switches are connected with power sources through wires.

Working principle: When in use, the motor 10 starts at regular intervals when the sensor is working, the motor 10 starts to drive the screw 7 to rotate through the belt 11, and then drives the cleaning mechanism 8 to reciprocate on the surface of the detection element 6, and is set in the installation sleeve 12. The cleaning mechanism 14 and the electromagnet 19 in the cleaning mechanism 14 are controlled to be turned on and off, thereby driving the lifting of the pillar 21, and the lifting of the pillar 21 drives the swing of the mounting frame 16, thereby controlling the swing of the cleaning brush 17 to clean the surface of the detection element 6 , the impurities placed on the outer wall of the detection element 6 interfere with the detection of the sensor.

The above description is only a preferred embodiment of the present invention, but the protection scope of the present invention is not limited to this. The equivalent replacement or change of the inventive concept thereof shall be included within the protection scope of the present invention.

Claims (6)

1. An oxygen sensor with good anti-interference performance, comprising a casing (1), characterized in that a flange (2) is fixedly connected to the top outer wall of the casing (1), and the top outer wall of the flange (2) is fixed A mounting seat (3) is connected, the outer wall of the top of the mounting seat (3) is fixedly connected with a sleeve (4), and the outer wall of the sleeve (4) is provided with vents (5) distributed at equal distances. The top outer wall of the mounting seat (3) is fixedly connected with a detection element (6), the outer wall of the detection element (6) is sleeved with a cleaning mechanism (8), and the connection process of the top outer wall of the mounting seat (3) is fixed by bearings There is a screw (7), the outer walls of the two screws (7) are screwed with fixing ears (13), and the two fixing ears (13) are fixedly connected to the cleaning mechanism (8). The outer wall of one end of 7) is fixedly connected with the driven pulley (9), the inner wall of one side of the mounting seat (3) is fixedly connected with the motor (10), and the output shaft of the motor (10) is fixedly connected with the driving pulley, A belt (11) is connected between the driving pulley and the driven pulley (9). 2. The oxygen sensor with good anti-interference performance according to claim 1, wherein the cleaning mechanism (8) comprises an installation sleeve (12), and the inner walls of the installation sleeve (12) are fixedly connected with Cleaning mechanism (14). 3. The oxygen sensor with good anti-interference performance according to claim 2, wherein the cleaning mechanism (14) comprises an installation box (15), and one side outer wall of the installation box (15) is provided with a rectangular shape Open your mouth. 4. The oxygen sensor with good anti-interference performance according to claim 3, wherein the inner wall of the rectangular opening is movably connected with a mounting bracket (16), and one side outer wall of the mounting bracket (16) is fixedly connected There is a cleaning brush (17). 5. An oxygen sensor with good anti-interference performance according to claim 4, characterized in that a fixing sleeve (18) is fixedly connected to the bottom inner wall of the installation box (15), and the inner wall of the fixing sleeve (18) slides A strut (21) is connected, the strut (21) is movably connected to the mounting frame (16), an electromagnet (19) is fixedly connected to the bottom inner wall of the fixing sleeve (18), and the bottom outer wall of the strut (21) is fixedly connected There is a magnet, and a spring (20) is connected between the electromagnet (19) and the magnet. 6 . The oxygen sensor with good anti-interference performance according to claim 5 , wherein the electromagnet ( 19 ) and the motor ( 10 ) are connected with switches through wires, and the switches are connected with power sources through wires. 7 .

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