A high-precision oxygen sensor testing device for automobiles

Abstract

This utility model discloses a high-precision oxygen sensor testing device for automobiles, comprising a main body with an installation cavity and a testing cavity. The device comprises the main body, testing cavity, installation cavity, oxygen sensor, locking mechanism, and clamping mechanism. In use, the oxygen sensor is installed in the installation cavity, with its detection head located within the testing cavity. By introducing oxygen into the testing cavity and creating an environment similar to that inside an exhaust pipe, the accuracy of the oxygen sensor can be accurately tested. Furthermore, the installation environment of the oxygen sensor can be simulated within the installation cavity, facilitating the testing of its durability. In addition, the fixing mechanism of this utility model has a simple structure and is easy to operate. Compared to the cumbersome fixing mechanisms in existing technologies, it greatly improves the efficiency of testing operations, reduces maintenance costs, and increases work efficiency.

Description

Technical Field

[0001] This utility model relates to the field of sensor testing technology, specifically to a high-precision oxygen sensor testing device for automobiles. Background Technology

[0002] The oxygen sensor is a key sensing component in the control system of an electronic fuel injection engine (referring to an engine equipped with an electronically controlled fuel injection system). It is a crucial component for controlling vehicle exhaust emissions, reducing vehicle pollution to the environment, and improving the quality of fuel combustion in vehicle engines. The oxygen sensor is a standard feature in automobiles and is installed on the engine exhaust pipe.

[0003] Existing technology discloses a sealing performance testing device for an oxygen sensor in automobiles, comprising an annular valve, a container, and an oxygen sensor. The annular valve has first intake pipes connected to both its left and right sides. A placement groove is formed on the upper part of the body of the first intake pipe on the right side. The lower end of the container is mounted on the placement groove of the first intake pipe. The oxygen sensor has threads on its outer side, and a threaded hole is formed on the lower side of the container. The lower end of the oxygen sensor passes through the threaded hole of the container and extends into the inner cavity of the first intake pipe. The inner cavity of the container is filled with a testing fluid. This device fills a gap in current product sealing performance testing. The tested oxygen sensor can operate in high-temperature environments while maintaining good sealing performance, thereby significantly improving the overall quality of the product and extending the lifespan of the oxygen sensor.

[0004] However, the aforementioned existing technologies have drawbacks. Their testing operations are too complex, the structure of the fixing mechanism is cumbersome, and the subsequent maintenance and replacement costs are high. Summary of the Invention

[0005] Technical problems to be solved To address the shortcomings of existing technologies, this invention provides a high-precision oxygen sensor testing device for automobiles, thus solving the aforementioned technical problems.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a high-precision oxygen sensor testing device for automobiles, comprising a device body, wherein the device body has an installation cavity and a testing cavity, multiple plug-in terminals are installed in the installation cavity, and oxygen sensors are connected to the multiple plug-in terminals. A detection head is protruding from the oxygen sensor, the detection head penetrates the installation cavity and extends into the testing cavity, an opening is provided at the top of the installation cavity, and a top cover is connected to the opening, a protrusion is protruding on the side of the top cover away from the hinge end, a movable part is hinged to the device body, and the movable part and the protrusion are connected and fixed by a locking mechanism, and a passage opening communicating with the outside is provided on one side of the testing cavity, a side cover is connected to the opening of the passage opening, a limit member is fixed on the side of the side cover away from the connection end by a locking mechanism, and the limit member is hinged to the device body.

[0007] Preferably, the locking mechanism includes a screw threadedly connected to the movable part, a handle provided at the top of the screw, a pressure block rotatably mounted at the bottom of the screw, and a groove adapted to the pressure block on the movable part.

[0008] Preferably, the pressing block is a cylindrical pressing block made of rubber.

[0009] Preferably, the movable part has a notch that can accommodate the protrusion, and the pressure block can move axially within the notch.

[0010] Preferably, the locking mechanism includes a rod slidably arranged on the limiting member, a handle welded to the rod, a return spring sleeved on the rod, one end of the return spring welded to the limiting member, the other end of the return spring welded to the handle, and an insertion hole adapted to the rod on the side cover.

[0011] Preferably, the limiting member has two symmetrical guide rods protruding from it, the handle is slidably arranged on the guide rods, and a stop block is welded to the end of the guide rod.

[0012] Preferably, rubber sealing rings are provided on the contact surfaces of the top cover and side cover with the main body of the device.

[0013] Compared with the prior art, this utility model provides a high-precision oxygen sensor testing device for automobiles, which has the following beneficial effects: This utility model, through its main body, testing chamber, mounting chamber, oxygen sensor, locking mechanism, and clamping mechanism, allows for precise testing of the oxygen sensor's accuracy by installing the oxygen sensor in the mounting chamber, with its detection head located within the testing chamber. This is achieved by introducing oxygen into the testing chamber and creating an environment similar to that inside an exhaust pipe. Furthermore, the mounting chamber simulates the oxygen sensor's installation environment, facilitating durability testing. In addition, the fixing mechanism of this utility model is simple in structure and easy to operate. Compared with the cumbersome fixing mechanisms in the prior art, it greatly improves the efficiency of testing operations, reduces maintenance costs, and increases work efficiency. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the main structure of this utility model; Figure 2 This is a side sectional view of the present invention. Figure 3 This is a side sectional view of the present invention. Figure 4 For the present utility model Figure 3 Enlarged schematic diagram of the structure at point A in the middle.

[0015] The components are as follows: 1. Main body of the device; 2. Top cover; 3. Movable parts; 4. Handle; 5. Side cover; 6. Limiting parts; 7. Mounting cavity; 8. Test cavity; 9. Plug end; 10. Oxygen sensor; 11. Detection head; 12. Rotating shaft; 13. Protrusion; 14. Pressure block; 15. Screw; 16. Groove; 17. Sealing ring; 18. Insertion hole; 19. Insert rod; 20. Grip; 21. Guide rod; 22. Return spring. Detailed Implementation

[0016] The embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of this utility model.

[0017] In the description of this utility model, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and 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, and therefore should not be construed as a limitation of this utility model. In addition, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0018] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0019] Please see Figure 1-4 A high-precision oxygen sensor testing device for automobiles includes a main body 1. The main body 1 has an installation cavity 7 and a testing cavity 8. Multiple plug-in terminals 9 are installed in the installation cavity 7, and oxygen sensors 10 are connected to the multiple plug-in terminals 9. The oxygen sensors 10 have a protruding detection head 11 that passes through the installation cavity 7 and extends into the testing cavity 8. The top of the installation cavity 7 has an opening, and a top cover 2 is connected to the opening. A protrusion 13 is protruding on the side of the top cover 2 away from the hinge end. A movable part 3 is hinged to the main body 1, and the movable part 3 is connected and fixed to the protrusion 13 by a locking mechanism. A passage opening communicating with the outside is opened on one side of the testing cavity 8, and a side cover 5 is connected to the opening of the passage opening. A limiting member 6 is fixed on the side of the side cover 5 away from the connection end by a locking mechanism. The limiting member 6 is hinged to the main body 1.

[0020] The device comprises a main body 1, a test chamber 8, a mounting chamber 7, an oxygen sensor 10, a locking mechanism, and a locking mechanism. In use, the oxygen sensor 10 is installed in the mounting chamber 7, with its detection head 11 positioned within the test chamber 8. This allows for precise testing of the oxygen sensor 10's accuracy by introducing oxygen into the test chamber 8 and creating an environment similar to that inside an exhaust pipe. Furthermore, the mounting chamber 7 simulates the installation environment of the oxygen sensor 10, facilitating durability testing. Moreover, the fixing mechanism of this invention is simple in structure and easy to operate. Compared to the cumbersome fixing mechanisms in existing technologies, it significantly improves the efficiency of testing operations, reduces maintenance costs, and increases work efficiency.

[0021] Specifically, in this embodiment, the locking mechanism includes a screw 15 threadedly connected to the movable part 3. A handle 4 is provided at the top of the screw 15, and a pressure block 14 is rotatably mounted at the bottom of the screw 15. A groove 16 adapted to the pressure block 14 is provided on the movable part 3. The pressure block 14 is a cylindrical abutment block made of rubber. The rubber material can increase the friction between the pressure block 13 and the protrusion 13, and at the same time play a buffering role to avoid damage to the protrusion 13. A notch is provided on the movable part 3 to accommodate the protrusion 13, and the pressure block 14 can move axially within the notch.

[0022] By rotating the handle 4, the screw 15 is driven to rotate, and then the screw 15 drives the pressure block 14 to move axially in the groove 16 through the threaded relationship, thereby pressing it against the protrusion 13 and fixing the top cover 2.

[0023] Specifically, in this embodiment, the locking mechanism includes a rod 19 slidably arranged on the limiting member 6, a handle 20 welded to the rod 19, a return spring 22 sleeved on the rod 19, one end of the return spring 22 welded to the limiting member 6, and the other end of the return spring 22 welded to the handle 20. The side cover 5 has a hole 18 adapted to the rod 19. The limiting member 6 has two symmetrical guide rods 21 protruding from it. The handle 20 is slidably arranged on the guide rods 21, and a stop is welded to the end of the guide rods 21.

[0024] By pulling the handle 20, the insertion rod 19 moves against the elastic force of the return spring 22, inserting or pulling out the insertion hole 18, thereby locking or unlocking the side cover 5. The guide rod 21 ensures the stability of the insertion rod 19 during movement, while the stop prevents the handle 20 from disengaging from the guide rod 21.

[0025] Specifically, in this embodiment, rubber sealing rings 17 are provided on the contact surfaces of the top cover 2 and the side cover 5 with the main body 1 of the device.

[0026] When in use, open the top cover 2, connect the oxygen sensor 10 to the plug-in terminal 9 in the mounting cavity 7 through the connecting structure, so that the detection head 11 of the oxygen sensor 10 extends into the test cavity 8, then close the top cover 2, rotate the movable part 3 to align it with the protrusion 13 on the top cover 2, rotate the handle 4 on the top of the screw 15, the screw 15 drives the pressure block 14 to move downward in the groove 16 of the movable part 3, the pressure block 14 presses the protrusion 13, and the top cover 2 is firmly fixed to the main body 1 of the device. By introducing oxygen or simulated exhaust gas into the test cavity 8 through the through port, the detection head 11 of the oxygen sensor 10 detects parameters such as the oxygen content in the test cavity 8, and transmits the data to external equipment for analysis and processing through the plug-in terminal 9, thereby obtaining test results such as the accuracy of the oxygen sensor 10; After the test is completed, first pull the handle 20 to pull out the plug rod 19 and unlock the side cover 5. Then turn the handle 4 on the top of the screw 15 to loosen the pressure block 14 from the protrusion 13 and unlock the top cover 2. Open the top cover 2 and remove the oxygen sensor 10 from the plug end 9.

[0027] In summary, the high-precision oxygen sensor testing device for automobiles of this invention is simple to operate, easy to use and maintain, and can accurately test the performance of the oxygen sensor 10, providing an effective means for the quality inspection of the oxygen sensor 10.

[0028] It should be noted that the oxygen sensor and the electrical components mentioned in this application are all connected to the external main controller and the mains power. Furthermore, the more detailed structure and connection relationship of the oxygen sensor and the electrical components mentioned in this application are described in the prior application No. 202320649903.7, which describes a high-precision oxygen sensor testing device for automobiles. This application will not repeat the description.

[0029] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A high-precision oxygen sensor testing device for automobiles, comprising a main body, characterized in that: The main body of the device has an installation cavity and a testing cavity. Multiple plug-in terminals are installed in the installation cavity, and oxygen sensors are connected to the multiple plug-in terminals. A detection head protrudes from the oxygen sensor, penetrating the installation cavity and extending into the testing cavity. An opening is provided at the top of the installation cavity, and a top cover is connected to the opening. A protrusion is provided on the side of the top cover away from the hinge end. A movable part is hinged to the main body of the device, and the movable part is connected and fixed to the protrusion by a locking mechanism. A passage opening communicating with the outside is provided on one side of the testing cavity, and a side cover is connected to the opening of the passage opening. A limit member is fixed on the side of the side cover away from the connection end by a locking mechanism. The limit member is hinged to the main body of the device.

2. The high-precision oxygen sensor testing device for automobiles according to claim 1, characterized in that: The locking mechanism includes a screw threaded to a movable part, a handle at the top of the screw, a pressure block rotatably mounted at the bottom of the screw, and a groove on the movable part that matches the pressure block.

3. The high-precision oxygen sensor testing device for automobiles according to claim 2, characterized in that: The pressure block is a cylindrical clamping block made of rubber.

4. The high-precision oxygen sensor testing device for automobiles according to claim 2, characterized in that: The movable part has a notch that can accommodate the protrusion, and the pressure block can move axially within the notch.

5. The high-precision oxygen sensor testing device for automobiles according to claim 1, characterized in that: The locking mechanism includes a rod that is slidably arranged on a limiting member, a handle welded to the rod, a return spring sleeved on the rod, one end of the return spring welded to the limiting member, the other end of the return spring welded to the handle, and a hole adapted to the rod on the side cover.

6. The high-precision oxygen sensor testing device for automobiles according to claim 5, characterized in that: The limiting component has two symmetrical guide rods protruding from it, and the grip is slidably arranged on the guide rods. A stop block is welded to the end of the guide rod.

7. The high-precision oxygen sensor testing device for automobiles according to claim 1, characterized in that: Rubber sealing rings are provided on the contact surfaces of the top cover and side cover with the main body of the device.

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