Automobile exhaust detection device

Abstract

The utility model discloses an automobile exhaust detection device, which comprises a fixed cylinder, a locking assembly and a connecting gas pipe, one end of the fixed cylinder is connected with the connecting gas pipe, the inner diameter of the fixed cylinder is gradually reduced along the direction of the connecting gas pipe, and a plurality of limiting arc sheets are arranged at the other end of the fixed cylinder in a surrounding manner. A positioning gap is formed between every two adjacent limiting arc pieces, and the locking assembly is arranged at the other end of the fixing cylinder in a sleeving mode so that the multiple limiting arc pieces can be contracted or opened. According to the utility model, the fixed cylinder is sleeved on the automobile exhaust pipe, the operation of inserting the connecting gas pipe into the automobile exhaust pipe is cancelled, the detection precision is improved, the inner diameter of the fixed cylinder is gradually reduced along the direction of the connecting gas pipe, the sealing performance is improved, and a plurality of limiting arc sheets are arranged around the other end of the fixed cylinder. And the multiple limiting arc pieces are contracted through the locking assembly, the fixing cylinder and the automobile exhaust pipe are locked, and the fixing effect and the sealing performance are improved.

Description

Technical Field

[0001] This utility model relates to the field of automotive testing equipment technology, and in particular to an automotive exhaust gas testing device. Background Technology

[0002] Vehicle exhaust emission testing technology is a crucial technology in the automotive industry, designed to detect pollutants in vehicle exhaust and ensure that emissions comply with national environmental protection standards. It helps governments formulate and enforce stricter emission standards and also encourages automakers to develop cleaner engines and emission control systems, thus promoting the green development of the automotive industry. Exhaust emission testing can effectively identify and reduce pollutants emitted by vehicles, such as carbon monoxide, hydrocarbons, and nitrogen oxides.

[0003] Currently, vehicle exhaust emission testing devices typically insert a connecting pipe into the exhaust pipe. However, the connection between the connecting pipe and the vehicle's exhaust pipe often has poor sealing, leading to inaccurate test data. Furthermore, the lack of a locking device results in unreliable fixation. Utility Model Content

[0004] In order to overcome the above-mentioned shortcomings of the prior art, the purpose of this utility model is to provide an automobile exhaust gas detection device that solves the problems of poor sealing and unstable fixing of current automobile exhaust gas detection devices.

[0005] The technical solution adopted by this utility model to solve its technical problem is: an automobile exhaust gas detection device, including a fixed cylinder, a locking assembly and a connecting air pipe. One end of the fixed cylinder is connected to the connecting air pipe. The inner diameter of the fixed cylinder gradually decreases along the direction of the connecting air pipe. The other end of the fixed cylinder is provided with a plurality of limiting arc plates, and a positioning gap is formed between adjacent limiting arc plates. The locking assembly is sleeved on the other end of the fixed cylinder to cause the plurality of limiting arc plates to retract or open.

[0006] As a further improvement of this utility model: the outer wall of the plurality of limiting arc plates is provided with a first external thread, the locking assembly is provided with a locking ring and an extension rod, the inner wall of the locking ring is provided with a first internal thread adapted to the first external thread, the extension rod is fixedly connected to the locking ring, and the length of the extension rod extends toward the connecting air pipe.

[0007] As a further improvement of this utility model: the outer wall of the limiting arc plate has a plurality of positioning protrusions, and the height of the plurality of positioning protrusions gradually increases in the direction away from the connecting air pipe. The locking assembly is provided with an extension rod and a locking ring. The extension rod is fixedly disposed on the outer wall of the locking ring, and the length of the extension rod extends in the direction of the connecting air pipe.

[0008] As a further improvement of this utility model: a fixing post is provided on the outer wall of the locking ring, the fixing post is provided with an installation hole and a first fixing hole, one end of the extension rod is provided with a second fixing hole, one end of the extension rod passes through the installation hole, and the first fixing hole and the second fixing hole are connected.

[0009] As a further improvement of this utility model: a second external thread is provided on the outer wall of one end of the fixed cylinder, and a second internal thread adapted to the second external thread is provided on the inner wall of the connecting air pipe.

[0010] As a further improvement of this utility model: the connecting pipe is connected to the exhaust gas detector.

[0011] As a further improvement of this utility model: a limiting ring is provided on the outer periphery of the fixed cylinder, and the limiting ring is located between the locking assembly and the connecting air pipe.

[0012] As a further improvement of this utility model: a push rod is installed on the outer wall of the limiting ring, and the length of the push rod extends along the direction of the connecting air pipe.

[0013] As a further improvement of this utility model: the positioning protrusion is a hemispherical protrusion.

[0014] As a further improvement of this utility model, the limiting arc plate is integrally formed with the fixing cylinder body.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] This invention connects a fixed cylinder to a connecting air pipe. The fixed cylinder is fitted onto the vehicle's exhaust pipe, allowing all exhaust gas to pass through the connecting air pipe, thus improving detection accuracy. By gradually reducing the inner diameter of the fixed cylinder along the direction of the connecting air pipe, the sealing performance is improved. Furthermore, multiple limiting arc plates are arranged around the other end of the fixed cylinder. The locking assembly causes the multiple limiting arc plates to retract, locking the fixed cylinder to the vehicle's exhaust pipe and improving the fixing effect and sealing performance. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of an automobile exhaust gas detection device according to an embodiment of the present invention.

[0018] Figure 2 This is an axial view of an automobile exhaust gas detection device according to an embodiment of the present invention.

[0019] Figure 3 This is a top view of an automobile exhaust gas detection device according to an embodiment of the present invention.

[0020] Figure label:

[0021] 10. Fixed cylinder; 101. Limiting arc plate; 102. Positioning gap; 20. Locking assembly; 201. Locking ring; 202. Extension rod; 203. Fixed stake; 204. Fixing component; 30. Connecting air pipe; 40. Positioning protrusion; 50. Limiting ring. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below in conjunction with specific embodiments and corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0023] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" 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; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0024] In order to solve the technical problems in the prior art, the present invention will be further described in conjunction with the accompanying drawings and embodiments:

[0025] like Figures 1 to 3 As shown in the figure, this utility model embodiment discloses an automobile exhaust gas detection device, including a fixed cylinder 10, a locking assembly 20 and a connecting air pipe 30. One end of the fixed cylinder 10 is connected to the connecting air pipe 30. The inner diameter of the fixed cylinder 10 gradually decreases along the direction of the connecting air pipe 30. The other end of the fixed cylinder 10 is provided with a plurality of limiting arc plates 101. A positioning gap 102 is formed between adjacent limiting arc plates 101. The locking assembly 20 is sleeved on the other end of the fixed cylinder 10 to cause the plurality of limiting arc plates 101 to retract or open.

[0026] During testing, the fixing cylinder 10 is fitted onto the vehicle's exhaust pipe, and the connecting pipe 30 is connected to the exhaust gas detector. This eliminates the need to insert the connecting pipe 30 into the vehicle's exhaust pipe, improving the sealing of the connection. The inner diameter of the fixing cylinder 10 gradually decreases along the direction of the connecting pipe 30, further enhancing the sealing at the connection between the connecting pipe 30 and the fixing cylinder 10. This ensures that all exhaust gases emitted by the vehicle pass through the connecting pipe 30, allowing the exhaust gas detector to monitor all exhaust gases and improving testing accuracy. Then, the surrounding limiting arc plate 101 and locking assembly 20 work together to lock the other end of the fixing cylinder 10 to the vehicle's exhaust pipe, providing excellent fixation and preventing the fixing cylinder 10 and connecting pipe 30 from falling off, while also improving the sealing of the test.

[0027] Among them, an automotive exhaust gas analyzer is a device that measures the concentration of various harmful gases in vehicle emissions. It can measure the concentration of carbon monoxide (CO), carbon dioxide (CO2), hydrocarbons (HC), nitrogen oxides (NOx), and sometimes particulate matter (PM). Different analyzers vary in function and accuracy. The test results indicate whether the vehicle's emissions meet the standards and provide a reference for vehicle maintenance to ensure that the vehicle complies with national or local emission standards. The exhaust gas analyzer uses an existing structure, which will not be elaborated upon in this application.

[0028] Furthermore, the limiting arc plate 101 is integrally formed with the body of the fixing cylinder 10.

[0029] In some embodiments, the outer wall of the plurality of limiting arc plates 101 is provided with a first external thread, the locking assembly 20 is provided with a locking ring 201 and an extension rod 202, the inner wall of the locking ring 201 is provided with a first internal thread adapted to the first external thread, the extension rod 202 is fixedly connected to the locking ring 201, and the length of the extension rod 202 extends toward the connecting air pipe 30.

[0030] In order to retract the multiple limiting arc plates 101 arranged around the perimeter, a first external thread is provided on the limiting arc plate 101, and a first internal thread is provided on the inner wall of the locking ring 201. The locking ring 201 is sleeved on the fixed cylinder 10. In use, by rotating the extension rod 202, the locking ring 201 is driven to rotate, and the locking ring 201 moves in a direction away from the connecting air pipe 30. In this way, the limiting arc plates 101 are gradually retracted, so that the inner diameter formed by the limiting arc plates 101 becomes smaller, and the limiting arc plates 101 are tightened near the outer wall of the automobile exhaust pipe, thereby improving the sealing performance of the fixed cylinder 10.

[0031] Furthermore, the fixing cylinder 10 is frustum-shaped, and its outer diameter gradually decreases along the direction of the connecting air pipe 30. The locking ring 201 rotates freely on the outer circumference of the fixing cylinder 10. When the locking ring 201 moves away from the connecting air pipe 30, it retracts the limiting arc plate 101. When the locking ring 201 moves closer to the connecting air pipe 30, it opens the limiting arc plate 101, facilitating the smooth sliding of the fixing cylinder 10 off the vehicle exhaust pipe. The limiting arc plate 101 is at a certain distance from the connecting air pipe 30, and similarly, the outlet end of the vehicle exhaust pipe is at a certain distance from the limiting arc plate 101.

[0032] In some embodiments, a plurality of positioning protrusions 40 are formed on the outer wall of the limiting arc plate 101. The protrusion height of the plurality of positioning protrusions 40 gradually increases in the direction away from the connecting air pipe 30. The locking assembly 20 is provided with an extension rod 202 and a locking ring 201. The extension rod 202 is fixedly disposed on the outer wall of the locking ring 201, and the length of the extension rod 202 extends toward the connecting air pipe 30.

[0033] Alternatively, a positioning protrusion 40 can be added to the outer wall of the limiting arc plate 101 to cooperate with the locking ring 201, thereby enabling the limiting arc plate 101 to contract and open. By gradually increasing the height of the positioning protrusion 40 along the direction away from the connecting air pipe 30, the locking ring 201 is moved by the push rod, causing the channel formed by the limiting arc plate 101 to shrink or enlarge, achieving a tight connection and separation between the limiting arc plate 101 and the vehicle exhaust pipe, further improving the sealing and reliability of the connection between the fixed cylinder 10 and the vehicle exhaust pipe, making it less likely for the fixed cylinder 10 to detach from the vehicle exhaust pipe.

[0034] Furthermore, the positioning protrusion 40 is a hemispherical protrusion. The hemispherical positioning protrusion 40 reduces the resistance to the movement of the locking ring 201 on the fixed cylinder 10, and makes it smoother for the locking ring 201 to press against and open the limiting arc plate 101.

[0035] In a specific example, a plurality of first positioning protrusions 40 are provided on a limiting arc plate 101, and the protrusion height of the plurality of first positioning protrusions 40 gradually increases along the direction away from the connecting air tube 30. A plurality of second positioning protrusions 40 are also provided on another limiting arc plate 101, and the protrusion height of the plurality of second positioning protrusions 40 gradually increases along the direction away from the connecting air tube 30. The first positioning protrusions 40 and the second positioning protrusions 40 are arranged symmetrically to each other.

[0036] In some embodiments, a fixing post 203 is provided on the outer wall of the locking ring 201. The fixing post 203 has an installation hole and a first fixing hole. One end of the extension rod 202 has a second fixing hole. One end of the extension rod 202 passes through the installation hole. The first fixing hole and the second fixing hole are connected.

[0037] In use, after passing one end of the extension rod 202 through the mounting hole, the fixing member 204 is assembled into the first fixing hole and the second fixing hole. In this way, the extension rod 202 and the locking ring 201 are fixedly connected, and the extension rod 202 is easy to disassemble and replace with extension rods 202 of different lengths.

[0038] In some embodiments, a second external thread is provided on the outer wall of one end of the fixed cylinder 10, and a second internal thread adapted to the second external thread is provided on the inner wall of the connecting air pipe 30.

[0039] By providing a second external thread on the fixed cylinder 10 and a corresponding second internal thread on the connecting air pipe 30, the fixed cylinder 10 and the connecting air pipe 30 can be quickly assembled.

[0040] In some embodiments, a limiting ring 50 is fitted around the outer periphery of the fixed cylinder 10, and the limiting ring 50 is located between the locking assembly 20 and the connecting air pipe 30. The limiting ring 50 can effectively prevent the locking ring 201 from slipping off one end of the fixed cylinder 10.

[0041] In some embodiments, a push rod is installed on the outer wall of the limiting ring 50, and the length of the push rod extends along the direction of the connecting air pipe 30.

[0042] The user pushes the fixing cylinder 10 to extend into the bottom of the car by pushing the rod, so that the fixing cylinder 10 is fitted on the outer circumference of the car's exhaust pipe, which is convenient for the user to operate quickly.

[0043] The main functions of this utility model are:

[0044] 1. By fitting the fixing cylinder onto the vehicle's exhaust pipe, the existing operation of inserting the connecting pipe into the exhaust pipe is eliminated, allowing all exhaust gas to enter the connecting pipe, thus improving detection accuracy. The inner diameter of the fixing cylinder gradually decreases along the direction of the connecting pipe to improve sealing. Furthermore, multiple limiting arc plates are arranged around the other end of the fixing cylinder. The locking assembly causes the multiple limiting arc plates to retract, locking the fixing cylinder to the vehicle's exhaust pipe and improving the fixing effect and sealing performance.

[0045] 2. By adding a positioning protrusion on the outer wall of the limiting arc plate to cooperate with the locking ring of the locking assembly, the height of the positioning protrusion is increased along the direction away from the connecting air pipe. The locking ring is moved by pushing the push rod, so that the channel enclosed by the limiting arc plate is reduced or enlarged, realizing the tight connection and separation between the limiting arc plate and the automobile exhaust pipe, further improving the connection sealing and reliability between the fixed cylinder and the automobile exhaust pipe, making it difficult for the fixed cylinder to fall off the automobile exhaust pipe.

[0046] In the description of this utility model, it should be understood that the terms "upper end face", "lower end face", "top", "bottom", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing this utility model. Therefore, they should not be construed as limiting the actual direction of use of this utility model.

[0047] In summary, any other corresponding modifications made by those skilled in the art after reading this utility model document, based on the technical solution and concept of this utility model without creative mental effort, shall all fall within the scope of protection of this utility model.

Claims

1. A vehicle exhaust emission detection device, characterized in that, The device includes a fixed cylinder, a locking assembly, and a connecting air tube. One end of the fixed cylinder is connected to the connecting air tube. The inner diameter of the fixed cylinder gradually decreases along the direction of the connecting air tube. The other end of the fixed cylinder is surrounded by multiple limiting arc plates, and a positioning gap is formed between adjacent limiting arc plates. The locking assembly is sleeved on the other end of the fixed cylinder to cause the multiple limiting arc plates to retract or open.

2. The vehicle exhaust emission detection device according to claim 1, characterized in that, The outer wall of the plurality of limiting arc plates is provided with a first external thread, the locking assembly is provided with a locking ring and an extension rod, the inner wall of the locking ring is provided with a first internal thread that matches the first external thread, the extension rod is fixedly connected to the locking ring, and the length of the extension rod extends toward the connecting air pipe.

3. The vehicle exhaust emission detection device according to claim 1, characterized in that, The outer wall of the limiting arc plate has multiple positioning protrusions. The height of the multiple positioning protrusions gradually increases in the direction away from the connecting air tube. The locking assembly is provided with an extension rod and a locking ring. The extension rod is fixed on the outer wall of the locking ring, and the length of the extension rod extends in the direction of the connecting air tube.

4. A vehicle exhaust emission detection device according to claim 2 or 3, characterized in that, The outer wall of the locking ring is provided with a fixing post, the fixing post is provided with an installation hole and a first fixing hole, one end of the extension rod is provided with a second fixing hole, one end of the extension rod passes through the installation hole, and the first fixing hole and the second fixing hole are connected.

5. The vehicle exhaust emission detection device according to claim 4, characterized in that, The outer wall of one end of the fixed cylinder is provided with a second external thread, and the inner wall of the connecting air pipe is provided with a second internal thread that matches the second external thread.

6. The vehicle exhaust emission detection device according to claim 1, characterized in that, The connecting pipe is connected to the exhaust gas detector.

7. The vehicle exhaust emission detection device according to claim 4, characterized in that, A limiting ring is fitted around the outer periphery of the fixed cylinder, and the limiting ring is located between the locking assembly and the connecting air pipe.

8. The vehicle exhaust emission detection device according to claim 7, characterized in that, A push rod is installed on the outer wall of the limiting ring, and the length of the push rod extends along the direction of the connecting air pipe.

9. A vehicle exhaust emission detection device according to claim 3, characterized in that, The positioning protrusion is a hemispherical protrusion.

10. The vehicle exhaust emission detection device according to claim 1, characterized in that, The limiting arc plate is integrally formed with the fixing cylinder body.

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