A nitrogen oxide sensor protective cover

Abstract

This utility model discloses a protective cover for a nitrogen-oxygen sensor, belonging to the field of nitrogen-oxygen sensor technology. The protective cover includes an upper cover and a lower cover rotatably connected to the upper cover, and also includes an arc-shaped rack fixedly connected to the inner wall of the upper cover. By rotating the upper cover, the arc-shaped rack slides within the lower cover, driving a gear to rotate. Simultaneously, the gear's rotation causes a first strip plate on its inner wall to rotate, and the first strip plate abuts against a second strip plate. This rotation of the gear, in turn, drives a bidirectional screw to rotate. The bidirectional screw's rotation brings the first and second clamping plates closer together, clamping and fixing the nitrogen-oxygen sensor. The operation is simple; simply closing the upper and lower covers automatically clamps the nitrogen-oxygen sensor. Compared to traditional threaded rods that drive clamping plates downwards, this method is faster and requires no additional steps.

Description

Technical Field

[0001] This utility model relates to the field of nitrogen and oxygen sensor technology, and in particular to a protective cover for a nitrogen and oxygen sensor. Background Technology

[0002] A nitrogen oxide sensor is a precision electronic component used to detect the nitrogen oxide content in vehicle exhaust. A protective cover prevents damage to the sensor from external physical impacts, dust, moisture, oil, etc., ensuring normal operation and accurate measurement. The nitrogen oxide sensor protective cover is a crucial component protecting the sensor, improving its reliability, accuracy, and lifespan, and providing strong support for vehicle emission control and environmental monitoring.

[0003] A search revealed Chinese patent publication number CN216870487U, which discloses a nitrogen-oxygen sensor cover, comprising a lower cover and an upper cover. The lower cover and the upper cover are rotatably connected at one end via a pivot. Both ends of the lower and upper covers have semi-circular holes that can form a circular opening. Ventilation holes are provided on the side walls of both the lower and upper covers. This patent has the following shortcomings: When fixing the nitrogen-oxygen sensor, the cover uses a threaded rod to drive the upper and lower clamping plates to clamp and fix the sensor. This fixing method is slow, and during installation, especially in confined spaces, it is inconvenient to rotate the threaded rod. Furthermore, after prolonged use in a vehicle, fine dust particles may accumulate on the threaded rod, affecting rotation and making subsequent disassembly extremely inconvenient. Utility Model Content

[0004] The purpose of this invention is to solve the problem that the protective cover in the prior art has a low fixation speed for nitrogen and oxygen sensors and cannot quickly complete the fixation, and to propose a protective cover for nitrogen and oxygen sensors.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A protective cover for a nitrogen-oxygen sensor includes an upper cover and a lower cover rotatably connected to the upper cover. It also includes an arc-shaped rack fixedly connected to the inner wall of the upper cover. A gear rotatably meshes with the arc-shaped rack inside the lower cover. A bidirectional screw is rotatably mounted inside the lower cover. The gear has a through hole, and a driving component for driving the bidirectional screw is disposed inside the gear. A first clamping plate and a second clamping plate for clamping the nitrogen-oxygen sensor are respectively threaded onto the bidirectional screw. When the upper cover is driven to rotate towards the lower cover, the arc-shaped rack drives the gear to rotate.

[0007] Preferably, mounting ears are fixedly connected to both sides of the upper and lower covers, and circular holes for placing the nitrogen and oxygen sensor are provided on both the upper and lower covers.

[0008] Preferably, ventilation holes are provided on the surfaces of both the upper and lower covers.

[0009] Preferably, the arc-shaped rack passes through the lower cover and is slidably connected to the lower cover. A bearing rod is rotatably connected to the inner wall of the lower cover, and the end of the bearing rod away from the inner wall of the lower cover is fixedly connected to the gear.

[0010] Preferably, the driving component includes a first strip plate fixedly connected to the inner wall of the cavity of the gear, and a second strip plate hinged to the surface of the bidirectional screw near the gear.

[0011] Preferably, a torsion spring is fixedly connected between the second strip plate and the bidirectional screw, and a baffle for limiting the movement of the second strip plate is fixedly connected to the surface of the bidirectional screw.

[0012] Preferably, a breathable plate is fixedly connected to the inner wall of the lower cover, and the surface of the breathable plate is provided with sliding holes corresponding to the first clamping plate and the second clamping plate.

[0013] Compared with the prior art, the present invention provides a protective cover for a nitrogen and oxygen sensor, which has the following advantages:

[0014] 1. This nitrogen-oxygen sensor protective cover works by rotating the upper cover to drive an arc-shaped rack to slide inside the lower cover. The arc-shaped rack drives a gear to rotate, which in turn drives the first strip plate on its inner wall to rotate. The first strip plate abuts against the second strip plate, which in turn drives a bidirectional screw to rotate. The rotation of the bidirectional screw causes the first and second clamping plates to move closer together, clamping and fixing the nitrogen-oxygen sensor. The operation is simple; the nitrogen-oxygen sensor is automatically clamped simply by closing the upper and lower covers. Compared to the traditional method of using a threaded rod to drive the clamping plate downwards, this method is faster and requires no other operating steps.

[0015] 2. In this nitrogen-oxygen sensor protective cover, when a nitrogen-oxygen sensor with a value smaller than the preset value is fixed inside the protective cover, after the bidirectional screw controls the first and second clamping plates to clamp the nitrogen-oxygen sensor, the upper and lower covers are not yet closed. At this time, the arc-shaped rack still needs to continue sliding to rotate the gear. At this time, the bidirectional screw cannot continue to rotate. At this time, the first strip plate continues to abut against the second strip plate. The second strip plate can rotate through the compression torsion spring to disengage the first strip plate from the second strip plate. This can prevent excessive clamping force from being applied to the nitrogen-oxygen sensor, and help prevent the nitrogen-oxygen sensor from being damaged by excessive clamping. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the front structure of a protective cover for a nitrogen and oxygen sensor proposed in this utility model;

[0017] Figure 2This is a top view of the protective cover for a nitrogen and oxygen sensor proposed in this utility model.

[0018] Figure 3 This is a schematic diagram of the internal structure of the lower cover of a nitrogen and oxygen sensor protective cover proposed in this utility model;

[0019] Figure 4 This utility model proposes a protective cover for a nitrogen and oxygen sensor. Figure 3 A schematic diagram of the structure of A in the middle;

[0020] Figure 5 This is a schematic diagram of the structure of the first clamping plate, the second clamping plate, the bidirectional screw, the gear, and the bearing rod in the protective cover for a nitrogen and oxygen sensor proposed in this utility model.

[0021] Figure 6 This is a front view schematic diagram of a protective cover for a nitrogen and oxygen sensor proposed in this utility model;

[0022] Figure 7 This is a schematic diagram of the drive component inside the gear in a protective cover for a nitrogen and oxygen sensor proposed in this utility model.

[0023] In the diagram: 1. Upper cover; 2. Lower cover; 3. Arc-shaped rack; 4. Gear; 5. Bidirectional screw; 6. Drive component; 61. First strip plate; 62. Second strip plate; 63. Torsion spring; 64. Baffle; 7. First clamping plate; 8. Second clamping plate; 9. Mounting ear; 10. Ventilation hole; 11. Bearing rod; 12. Breathing plate; 13. Sliding hole. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0025] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0026] Reference Figures 1-7A protective cover for a nitrogen-oxygen sensor includes an upper cover 1 and a lower cover 2 rotatably connected to the upper cover 1. It also includes an arc-shaped rack 3 fixedly connected to the inner wall of the upper cover 1. A gear 4, meshing with the arc-shaped rack 3, is rotatably disposed inside the lower cover 2. A bidirectional screw 5 is rotatably disposed inside the lower cover 2. The gear 4 has a through hole, and a driving component 6 for driving the bidirectional screw 5 to rotate is disposed inside the gear 4. A first clamping plate 7 and a second clamping plate 8 for clamping the nitrogen-oxygen sensor are respectively threaded onto the bidirectional screw 5. When the upper cover 1 is driven to rotate towards the lower cover 2, the arc-shaped rack 3 drives the gear 4. When the nitrogen-oxygen sensor is placed inside the protective cover, it is placed inside the lower cover 2. Then, by rotating the upper cover 1, the arc-shaped rack 3 slides inside the lower cover 2. The arc-shaped rack 3 drives the gear 4 to rotate. The gear 4 drives the bidirectional screw 5 to rotate through the drive component 6. The rotation of the bidirectional screw 5 will bring the first clamping plate 7 and the second clamping plate 8 closer together, clamping and fixing the nitrogen-oxygen sensor. The operation is simple. Just close the upper cover 1 and the lower cover 2 to automatically clamp the nitrogen-oxygen sensor. Compared with the traditional threaded rod driving the clamping plate to press down, it has the advantage of being faster and requires no other operation steps.

[0027] Both sides of the upper cover 1 and the lower cover 2 are fixedly connected with mounting ears 9. Both the upper cover 1 and the lower cover 2 are provided with round holes for placing the nitrogen and oxygen sensor. After the upper cover 1 and the lower cover 2 are closed, the operator can fix the mounting ears 9 on the upper cover 1 and the lower cover 2 together with bolts.

[0028] Ventilation holes 10 are provided on the surfaces of both the upper cover 1 and the lower cover 2. Through the ventilation holes 10 on the upper cover 1 and the lower cover 2, airflow can pass through the space formed by the upper cover 1 and the lower cover 2 during vehicle operation, which can remove the heat from the nitrogen-oxygen sensor.

[0029] The arc-shaped rack 3 passes through the lower cover 2 and is slidably connected to the lower cover 2. A bearing rod 11 is rotatably connected to the inner wall of the lower cover 2. The end of the bearing rod 11 away from the inner wall of the lower cover 2 is fixedly connected to the gear 4. The bearing rod 11 can provide stable support for the gear 4.

[0030] The drive component 6 includes a first strip plate 61 fixedly connected to the inner wall of the cavity of the gear 4, and a second strip plate 62 hinged to the surface of the bidirectional screw 5 near the gear 4.

[0031] A torsion spring 63 is fixedly connected between the second strip plate 62 and the bidirectional screw 5. A baffle 64 for limiting the second strip plate 62 is fixedly connected to the surface of the bidirectional screw 5. When the gear 4 rotates, it drives the first strip plate 61 on its inner wall to rotate. The first strip plate 61 abuts against the second strip plate 62, thereby driving the bidirectional screw 5 to rotate when the gear 4 rotates. When the nitrogen-oxygen sensor with a value less than the preset value is fixed inside the protective cover, after the bidirectional screw 5 controls the first clamping plate 7 and the second clamping plate 8 to clamp the nitrogen-oxygen sensor, the upper cover 1 and the lower cover 2 are not yet closed. At this time, the arc-shaped rack 3 still needs to continue to slide. When gear 4 rotates, the bidirectional screw 5 can no longer rotate. At this time, the first strip plate 61 continues to abut against the second strip plate 62. The second strip plate 62 can rotate through the compression torsion spring 63, causing the first strip plate 61 to disengage from the second strip plate 62. This prevents excessive clamping force from being applied to the nitrogen-oxygen sensor, helping to prevent the nitrogen-oxygen sensor from being damaged by excessive clamping. When the upper cover 1 is opened, gear 4 and the first strip plate 61 rotate in opposite directions. Through the baffle 64, the second strip plate 62 cannot rotate in the direction of the baffle 64, which will drive the bidirectional screw 5 to rotate in the opposite direction, causing the nitrogen-oxygen sensor to automatically release the clamp.

[0032] A vent plate 12 is fixedly connected to the inner wall of the lower cover 2. The surface of the vent plate 12 is provided with sliding holes 13 corresponding to the first clamping plate 7 and the second clamping plate 8. The heat generated by the nitrogen and oxygen sensor can be quickly dissipated through the vent plate 12. The sliding holes 13 on the vent plate 12 can guide the first clamping plate 7 and the second clamping plate 8 when they slide on the bidirectional screw 5.

[0033] In this invention, when the nitrogen-oxygen sensor is placed inside the protective cover, it is placed inside the lower cover 2. Then, by rotating the upper cover 1, the arc-shaped rack 3 slides within the lower cover 2. The arc-shaped rack 3 drives the gear 4 to rotate. Simultaneously, the rotation of the gear 4 causes the first strip plate 61 on its inner wall to rotate. The first strip plate 61 abuts against the second strip plate 62, thus causing the bidirectional screw 5 to rotate. The rotation of the bidirectional screw 5 brings the first clamping plate 7 and the second clamping plate 8 closer together, clamping and fixing the nitrogen-oxygen sensor. The operation is simple; simply closing the upper cover 1 and the lower cover 2 automatically clamps the nitrogen-oxygen sensor. Compared to traditional threaded rods driving clamping plates… The downward pressure offers the advantage of faster operation, requiring no additional steps. When the nitrogen-oxygen sensor with a value less than the preset value is fixed inside the protective cover, after the bidirectional screw 5 controls the first clamping plate 7 and the second clamping plate 8 to clamp the nitrogen-oxygen sensor, the upper cover 1 and the lower cover 2 are not yet closed. At this time, the arc-shaped rack 3 still needs to continue sliding to rotate the gear 4. At this time, the bidirectional screw 5 cannot continue to rotate. At this time, the first strip plate 61 continues to abut against the second strip plate 62. The second strip plate 62 can be rotated by the compression torsion spring 63 to disengage the first strip plate 61 from the second strip plate 62. This can prevent excessive clamping force from being applied to the nitrogen-oxygen sensor, helping to prevent the nitrogen-oxygen sensor from being damaged by excessive clamping.

[0034] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A nitrogen oxide sensor guard comprising: The upper cover (1) and the lower cover (2) rotatably connected to the upper cover (1) are characterized in that they further include: An arc-shaped rack (3) is fixedly connected to the inner wall of the upper cover (1). A gear (4) that meshes with the arc-shaped rack (3) is rotatably arranged inside the lower cover (2). A bidirectional screw (5) is rotatably arranged inside the lower cover (2). A through hole is opened on the gear (4). A driving component (6) for driving the bidirectional screw (5) to rotate is arranged inside the gear (4). A first clamping plate (7) and a second clamping plate (8) for clamping the nitrogen and oxygen sensor are respectively threaded on the bidirectional screw (5). When the upper cover (1) is driven to rotate in the direction of the lower cover (2), the arc-shaped rack (3) drives the gear (4) to rotate.

2. A nitric oxide sensor protective cover according to claim 1, wherein Both sides of the upper cover (1) and the lower cover (2) are fixedly connected with mounting ears (9), and both the upper cover (1) and the lower cover (2) are provided with round holes for placing the nitrogen and oxygen sensors.

3. A NO sensor guard according to claim 1, wherein, Ventilation holes (10) are provided on the surfaces of both the upper cover (1) and the lower cover (2).

4. A protective cover for a nitrogen and oxygen sensor according to claim 1, characterized in that, The arc-shaped rack (3) passes through the lower cover (2) and is slidably connected to the lower cover (2). A bearing rod (11) is rotatably connected to the inner wall of the lower cover (2). One end of the bearing rod (11) away from the inner wall of the lower cover (2) is fixedly connected to the gear (4).

5. A protective cover for a nitrogen and oxygen sensor according to claim 1, characterized in that, The drive component (6) includes a first strip plate (61) fixedly connected to the inner wall of the cavity of the gear (4), and a second strip plate (62) hinged to the surface of the bidirectional screw (5) near the gear (4).

6. A protective cover for a nitrogen and oxygen sensor according to claim 5, characterized in that, A torsion spring (63) is fixedly connected between the second strip plate (62) and the bidirectional screw (5), and a baffle (64) for limiting the second strip plate (62) is fixedly connected to the surface of the bidirectional screw (5).

7. A protective cover for a nitrogen and oxygen sensor according to claim 1, characterized in that, A breathable plate (12) is fixedly connected to the inner wall of the lower cover (2), and the surface of the breathable plate (12) is provided with sliding holes (13) corresponding to the first clamping plate (7) and the second clamping plate (8).

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