Oxygen sensor assembly

Abstract

The utility model discloses an oxygen sensor assembly, and belongs to the technical field of oxygen sensors. The oxygen sensor assembly comprises a sensor body, one end of the sensor body is fixedly connected with a threaded column, the end portion of the threaded column is fixedly connected with a sensing head and a protective cover, the end portion of the protective cover is detachably connected with a connecting cap, and a plurality of air inlet holes are formed in the connecting cap; according to the utility model, under the cooperation of the air inlet hole, the rotating shaft, the turbulent flow fan blades and the cleaning brush, when air flow enters the air inlet hole to blow the turbulent flow fan blades to rotate, the cleaning brush can clean the surface of the sensing head, and through the arrangement of the mode, the cleaning efficiency is improved. The carbon deposition and dust attached to the surface of the sensing head can be cleaned in time, the problem that too much carbon deposition and dust attached to the surface of the sensing head affect the measurement accuracy and need to be replaced is solved, and the service life of the oxygen sensor is further prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of oxygen sensors, in particular to an oxygen sensor component. Background Art

[0002] In engines that use three-way catalytic converters to reduce exhaust pollution, oxygen sensors are essential components. Once 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. Therefore, an oxygen sensor is installed in the exhaust pipe to detect the concentration of oxygen in the exhaust gas and send a feedback signal to the ECU, which then controls the increase or decrease of the injector injection amount, thereby controlling the air-fuel ratio of the mixture near the theoretical value.

[0003] For example, in the prior art, Chinese patent publication number CN217681938U, application date: 2022-10-28, entitled "An Oxygen Sensor Assembly," belongs to the field of oxygen sensor technology. An oxygen sensor assembly includes a sensor body, and also includes: a locking nut fixedly connected to the bottom of the sensor body, a threaded column fixedly connected to the bottom of the locking nut, a filter cover and a sensor head fixedly connected to the bottom of the threaded column, and the filter cover is sleeved outside the sensor head. The utility model can heat the alcohol filled in the first piston cylinder and the second piston cylinder with exhaust gas during exhaust, causing the alcohol to vaporize and expand, thereby driving the second piston cylinder and the connecting rod to expand, so that the exhaust gas blows the air cylinder to rotate about the rotating shaft, thereby driving the rotating rod to rotate about the surface of the filter cover. In this way, carbon deposits and dust attached to the surface of the filter cover can be continuously cleaned by a brush, thereby preventing the sensor from being blocked by the accumulation of carbon deposits and dust on the filter cover during long-term use, resulting in the device being unable to monitor the oxygen content in the exhaust gas in real time, thereby reducing engine operating efficiency.

[0004] However, the above patent still has the disadvantage that, when cleaning, only the surface of the filter cover can be cleaned, but carbon deposits and dust will also adhere to the surface of the sensor head. Since the carbon deposits and dust attached to the surface of the sensor head cannot be cleaned in time, too much carbon and dust adhere to the surface of the sensor head, affecting the measurement accuracy and requiring replacement, further shortening the service life of the oxygen sensor.

[0005] Therefore, in order to solve this problem, the present invention provides an oxygen sensor assembly. Utility Model Content

[0006] The purpose of the utility model is to solve the problems in the prior art and to propose an oxygen sensor component.

[0007] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0008] An oxygen sensor assembly includes a sensor body, one end of the sensor body is fixedly connected to a threaded column, the ends of the threaded column are respectively fixedly connected to a sensor head and a protective cover, the end of the protective cover is detachably connected to a connecting cap, a plurality of air inlet holes are opened on the connecting cap, the interior of the connecting cap is rotatably connected to a rotating shaft through a bearing, the surface of the rotating shaft is fixedly connected to a spoiler fan blade, a cleaning brush is provided on the surface of the rotating shaft, the cleaning brush is respectively attached to the surface of the sensor head and the protective cover, and the surface of the protective cover is provided with a plurality of through holes.

[0009] Preferably, an annular groove is provided inside the connecting cap, a corrugated gasket is fixedly connected to the inner top wall of the annular groove, a fixing rod is fixedly connected to the side wall of the cleaning brush, and the end of the fixing rod fits the surface of the annular groove.

[0010] Preferably, a guide rod is fixedly connected to the interior of the rotating shaft, and the cleaning brush is slidably connected to the guide rod.

[0011] Preferably, a tension spring is sleeved on the surface of the guide rod, and two ends of the tension spring are fixedly connected to the rotating shaft and the cleaning brush respectively.

[0012] Preferably, the bottom of the corrugated gasket is away from the inner bottom wall of the annular groove to form a space, and the fixing rod is located in the space and fits into the bottom surface of the corrugated gasket.

[0013] Preferably, the cleaning brushes are provided in two groups, and the two groups of cleaning brushes are symmetrically arranged along the center line of the rotation axis.

[0014] Preferably, a plurality of bristles are fixedly connected to both sides of the cleaning brush, and the bristles are respectively attached to the surface of the sensor head and the protective cover.

[0015] Preferably, the protective cover and the connecting cap are detachably connected by threaded connection.

[0016] Compared with the prior art, the present invention provides an oxygen sensor assembly with the following beneficial effects:

[0017] The oxygen sensor assembly cooperates with the air inlet, the rotating shaft, the spoiler blades and the cleaning brush. When the airflow enters the air inlet, the spoiler blades are blown to rotate, so that the cleaning brush can clean the surface of the sensor head. Through this arrangement, the carbon deposits and dust attached to the surface of the sensor head can be cleaned in time, preventing the problem of excessive carbon deposits and dust on the surface of the sensor head affecting the measurement accuracy and requiring replacement, thereby further extending the service life of the oxygen sensor. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a structural schematic diagram of an oxygen sensor assembly proposed by the present utility model;

[0019] Figure 2 This is a schematic diagram of the cross-section structure of an oxygen sensor assembly proposed in the present invention;

[0020] Figure 3 An oxygen sensor assembly proposed by the utility model Figure 2 A in the middle is an enlarged structural diagram;

[0021] Figure 4 This is a schematic diagram of the connecting cap structure of an oxygen sensor assembly proposed by the present invention;

[0022] Figure 5 This is a front structural schematic diagram of an oxygen sensor assembly proposed by the present invention;

[0023] Figure 6 This is a schematic diagram of the structure of a corrugated gasket of an oxygen sensor assembly proposed by the present invention.

[0024] In the figure: 1. Sensor body; 2. Threaded column; 3. Sensor head; 4. Protective cover; 41. Through hole; 5. Connecting cap; 6. Air inlet; 7. Rotating shaft; 8. Turbine blade; 9. Cleaning brush; 10. Annular groove; 11. Corrugated washer; 12. Fixing rod; 13. Guide rod; 14. Tension spring. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0026] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention.

[0027] Example 1: Reference Figures 1-6, an oxygen sensor assembly includes a sensor body 1, one end of the sensor body 1 is fixedly connected to a threaded column 2, the ends of the threaded column 2 are respectively fixedly connected to the sensor head 3 and the protective cover 4, and the end of the protective cover 4 is detachably connected to a connecting cap 5, and a plurality of air inlet holes 6 are opened on the connecting cap 5. The interior of the connecting cap 5 is rotatably connected to a rotating shaft 7 through a bearing, and a turbulent fan blade 8 is fixedly connected to the surface of the rotating shaft 7. A cleaning brush 9 is provided on the surface of the rotating shaft 7, and the cleaning brushes 9 are respectively attached to the surfaces of the sensor head 3 and the protective cover 4. The surface of the protective cover 4 is provided with a plurality of through holes 41. The number of cleaning brushes 9 is set in two groups, and the two groups of cleaning brushes 9 are symmetrically arranged along the center line of the rotating shaft 7. A plurality of bristles are fixedly connected on both sides of the cleaning brush 9, and the bristles are respectively attached to the surfaces of the sensor head 3 and the protective cover 4, and the protective cover 4 and the connecting cap 5 are detachable by threaded connection.

[0028] When the gas in the exhaust pipe passes through the air inlet 6 opened by the connecting cap 5, the turbulent flow blades 8 are driven to rotate, and the gas can be turbulently distributed on the surface of the sensor head 3 for detection. When the turbulent flow blades 8 rotate, the cleaning brush 9 connected to the rotating shaft 7 can be synchronously driven to rotate. When the cleaning brush 9 rotates, the surfaces of the sensor head 3 and the protective cover 4 can be cleaned to prevent carbon deposits and dust attached to the surface of the sensor head 3 from being cleaned in time and affecting the detection quality. When the connecting cap 5 and the protective cover 4 are threadedly connected, the turbulent flow blades 8 are driven to rotate.

[0029] Example 2: Reference Figure 2 、 Figure 3 、 Figure 4 and Figure 6 , which is basically the same as Example 1, and furthermore: an annular groove 10 is opened inside the connecting cap 5, and a corrugated gasket 11 is fixedly connected to the inner top wall of the annular groove 10, and a fixing rod 12 is fixedly connected to the side wall of the cleaning brush 9, and the end of the fixing rod 12 fits the surface of the annular groove 10, and a guide rod 13 is fixedly connected to the inside of the rotating shaft 7, and the cleaning brush 9 is slidably connected to the guide rod 13. A tension spring 14 is sleeved on the surface of the guide rod 13, and the two ends of the tension spring 14 are respectively fixedly connected to the rotating shaft 7 and the cleaning brush 9. The bottom of the corrugated gasket 11 is away from the inner bottom wall of the annular groove 10 to form a space, and the fixing rod 12 is located in the space and fits the bottom surface of the corrugated gasket 11.

[0030] When the annular groove 10 is opened inside the air inlet 6, the corrugated gasket 11 can be installed, and the fixed rod 12 fitted under the corrugated gasket 11 is fixed to the side wall of the cleaning brush 9. When the cleaning brush 9 rotates, it will move up and down along the corrugations opened in the corrugated gasket 11. The up and down reciprocating motion of the cleaning brush 9 can scrape the surface of the sensor head 3 with a higher cleaning effect, and the up and down movement can avoid the problem of inadequate cleaning at the gap position between the bristles. Under the setting of the guide rod 13, the cleaning brush 9 can be guided and limited. Under the spring force of the tension spring 14, the cleaning brush 9 can be moved upward. Since the fixed rod 12 is fixed to the side wall of the cleaning brush 9, it can also move upward, so that the fixed rod 12 is tightly fitted to the surface of the corrugated gasket 11. There is space between the annular groove 10 and the corrugated gasket 11, which is convenient for the fixed rod 12 to rotate.

[0031] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the present invention can make equivalent replacements or changes based on the technical solution and utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An oxygen sensor assembly, comprising a sensor body (1), characterized in that: One end of the sensor body (1) is fixedly connected to a threaded column (2), and the ends of the threaded column (2) are respectively fixedly connected to a sensor head (3) and a protective cover (4), and the end of the protective cover (4) is detachably connected to a connecting cap (5), and a plurality of air inlet holes (6) are provided on the connecting cap (5). The interior of the connecting cap (5) is rotatably connected to a rotating shaft (7) through a bearing, and a turbulent fan blade (8) is fixedly connected to the surface of the rotating shaft (7). A cleaning brush (9) is provided on the surface of the rotating shaft (7), and the cleaning brush (9) is respectively attached to the surface of the sensor head (3) and the protective cover (4), and a plurality of through holes (41) are provided on the surface of the protective cover (4).

2. An oxygen sensor assembly according to claim 1, characterized in that: An annular groove (10) is provided inside the connecting cap (5), a corrugated gasket (11) is fixedly connected to the inner top wall of the annular groove (10), and a fixing rod (12) is fixedly connected to the side wall of the cleaning brush (9), and the end of the fixing rod (12) is in contact with the surface of the annular groove (10).

3. The oxygen sensor assembly according to claim 1, characterized in that: A guide rod (13) is fixedly connected to the interior of the rotating shaft (7), and the cleaning brush (9) is slidably connected to the guide rod (13).

4. An oxygen sensor assembly according to claim 3, characterized in that: The surface of the guide rod (13) is sleeved with a tension spring (14), and the two ends of the tension spring (14) are respectively fixedly connected to the rotating shaft (7) and the cleaning brush (9).

5. The oxygen sensor assembly according to claim 2, characterized in that: The bottom of the corrugated gasket (11) is away from the inner bottom wall of the annular groove (10) to form a space, and the fixing rod (12) is located in the space and fits on the bottom surface of the corrugated gasket (11).

6. The oxygen sensor assembly according to claim 1, characterized in that: The number of the cleaning brushes (9) is two groups, and the two groups of cleaning brushes (9) are symmetrically arranged along the center line of the rotating shaft (7).

7. The oxygen sensor assembly according to claim 1, characterized in that: A plurality of bristles are fixedly connected to both sides of the cleaning brush (9), and the bristles are respectively attached to the surfaces of the sensor head (3) and the protective cover (4).

8. The oxygen sensor assembly according to claim 1, characterized in that: The protective cover (4) and the connecting cap (5) are detachably connected by threaded connection.

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