Automobile tail pipe switching device

Abstract

The utility model provides an automobile tail pipe switching device. The automobile tail pipe switching device comprises a first switching piece and a second switching piece. A first tail gas channel is formed in the middle of the first adapter, a first adapter part and a first connecting part are formed in the positions close to the two ends of the first adapter respectively, the outer wall of the first adapter part is provided with a first adapter face with the outer diameter gradually reduced in the direction of the end, and the first connecting part is provided with an annular first matching face; a through second tail gas channel is formed in the middle of the second adapter, a second adapter part and a second connecting part are formed in the positions close to the two ends of the second tail gas channel respectively, a second adapter surface is arranged on the outer wall of the second adapter part, and the second connecting part is provided with an annular second matching surface which can be connected with the first matching surface in a sealed and sleeved mode. According to the utility model, the first adapter is connected with the automobile tail pipe in a matching manner from the inner side, and the decoration part outside the automobile tail pipe does not influence the use of the first adapter, so that the automobile tail pipe exhaust test device can be widely applied to emission tests of vehicles of various specifications.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicle exhaust monitoring, and particularly relates to an automobile tail pipe adapter device. Background Art

[0002] Before a vehicle is launched on the market, it needs to undergo various mandatory tests required by the state. Only after all the tests are passed can it be sold on the market. Emission testing is one of the mandatory tests before an automobile product is launched.

[0003] During emission testing, the vehicle is fixed on a dynamometer in an environmental chamber, and the exhaust tail pipe is connected to a gas analysis device. The vehicle is started to operate under specific working conditions, and the gas analysis device samples and analyzes the gas discharged from the exhaust tail pipe. When the test results meet the regulatory requirements, the test can pass.

[0004] During the emission test, a rubber sleeve is usually used in the laboratory to connect the exhaust tail pipe and the receiving pipe of the gas analysis device. The end of the rubber sleeve wraps around the outer wall of the exhaust tail pipe to form a sealed structure, so that the discharged exhaust gas can be completely transported to the gas analysis device. For example, the patent document with the application number CN201920300738.8 discloses a single-pipe automobile exhaust gas adapter tool, which includes a metal hose in the middle and rubber hoses at both ends. The rubber hoses can be sleeved on the automobile tail pipe. The above test method is applicable to exhaust tail pipes with a circular shape, outward convexity and no special decorative parts on the outside. However, for some existing products, irregularly shaped decorative parts are welded on the exhaust tail pipe, making it impossible for the rubber sleeve to be sleeved on the outer wall of the exhaust tail pipe or unable to form a sealed structure after being sleeved, and further testing cannot be carried out. Summary of the Invention

[0005] In order to solve the above problems, the utility model provides an automobile tail pipe adapter device, which can be adapted to various types of automobile tail pipes and meet the sealing connection requirements during the emission test.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] An automobile tail pipe adapter device includes a first adapter made of at least partially elastic material and a second adapter made of rigid material; a through first exhaust gas passage is formed in the middle of the first adapter, a first adapter part and a first connection part are respectively formed at positions near both ends of the first exhaust gas passage, an outer wall of the first adapter part has a first adapter surface in a frustum shape with an outer diameter gradually decreasing towards the end, and the first connection part has an annular first mating surface; a through second exhaust gas passage is formed in the middle of the second adapter, a second adapter part and a second connection part are respectively formed at positions near both ends of the second exhaust gas passage, an outer wall of the second adapter part has a cylindrical second adapter surface, and the second connection part has an annular second mating surface that can be hermetically sleeved with the first mating surface.

[0008] Further, the first mating surface is formed by an inner wall of the first connection part, and the second mating surface is formed by an outer wall of the second connection part.

[0009] Further, the second connection part further includes a first limiting convex block protruding relative to the second mating surface, and the first limiting convex block has a first abutting surface perpendicularly connected to the second mating surface.

[0010] Further, at least one first annular sealing part protruding outward relative to the second mating surface and extending circumferentially around the second mating surface is provided in the middle of the second mating surface.

[0011] Further, at least one second annular sealing part protruding outward relative to the second adapter surface and extending circumferentially around the second adapter surface is provided in the middle of the second adapter surface.

[0012] Further, the second adapter further includes an external connection part provided between the second adapter part and the second connection part, and the external connection part has an external pulling hole.

[0013] Further, the external connection part includes a mounting base block and a pulling ring formed with the external pulling hole, the mounting base block is provided with a mounting hole, and the pulling ring passes through the mounting hole and is movably connected to the mounting base block.

[0014] Further, the first mating surface is formed by an outer wall of the first connection part, and the second mating surface is formed by an inner wall of the second connection part.

[0015] Further, the first connection part further includes a second limiting convex block protruding relative to the first mating surface, and the second limiting convex block has a second abutting surface perpendicularly connected to the first mating surface.

[0016] The following beneficial effects can be achieved by applying the present utility model:

[0017] 1. The first adapter of the present utility model is connected to the vehicle tailpipe in a mating manner from the inside, and the decorative components outside the vehicle tailpipe will not affect the use of the first adapter. The second adapter can be hermetically connected to the first adapter and provide an installation site for the rubber sleeve, and can be widely used for the emission tests of various specifications of vehicles.

[0018] 2. Some embodiments of the present utility model are provided with an annular sealing portion, which can improve the connection stability of the socket structure and, in some cases, provide a fixed site for the hoop, further ensuring the airtightness of the socket structure.

[0019] 3. Some embodiments of the present utility model have an external connection portion, which can be connected to a strap. An axial tension can be applied to the second adapter through the strap to tightly press the second adapter against the first adapter, improving the connection airtightness between the first adapter and the second adapter. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 FIG. is a schematic structural diagram of the vehicle exhaust gas adapter in Embodiment 1;

[0021] Figure 2 is Figure 1 a cross-sectional view of the vehicle exhaust gas adapter shown;

[0022] Figure 3 is Figure 1 a schematic diagram of the working state of the vehicle exhaust gas adapter shown;

[0023] Figure 4 FIG. is a schematic structural diagram of the exhaust gas adapter in a further embodiment;

[0024] Figure 5 FIG. is a schematic structural diagram of the exhaust gas adapter in a further embodiment;

[0025] Figure 6 FIG. is a schematic structural diagram of the exhaust gas adapter in a further embodiment;

[0026] Figure 7 FIG. is a schematic structural diagram of the vehicle exhaust gas adapter in Embodiment 2;

[0027] Figure 8 FIG. is a schematic structural diagram of the exhaust gas adapter in a further embodiment;

[0028] In the figure, 1 is the first adapter, 11 is the first exhaust gas passage, 12 is the first adapter portion, 121 is the first adapter surface, 13 is the first connection portion, 131 is the first mating surface, 2 is the second adapter, 21 is the second exhaust gas passage, 22 is the second adapter portion, 221 is the second adapter surface, 222 is the second annular seal portion, 23 is the second connection portion, 231 is the second mating surface, 232 is the first limiting projection, 233 is the first annular seal portion, 24 is the external connection portion, 241 is the mounting base block, 242 is the pull ring, 3 is the vehicle tail pipe, 4 is the rubber sleeve, and 6 is the strap. Detailed implementation mode

[0029] The technical solutions of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative work shall fall within the protection scope of the present invention.

[0030] Embodiment 1

[0031] Reference Figure 1 And Figure 2 In this embodiment, a vehicle exhaust gas adapter device is provided in the implementation manner of the first aspect, which includes a first adapter 1 made of an elastic material and a second adapter 2 made of a rigid material. Specifically:

[0032] A first exhaust gas passage 11 that penetrates along its own axis is formed in the middle of the first adapter 1. A first adapter portion 12 and a first connection portion 13 are respectively formed at positions close to both ends of the first exhaust gas passage. The outer wall of the first adapter portion 12 has a frustum-shaped first adapter surface 121 with an outer diameter gradually decreasing towards the end, and the inner wall of the first connection portion has a cylindrical first mating surface 131;

[0033] A second exhaust gas passage 21 that penetrates along its own axis is formed in the middle of the second adapter 2. A second adapter portion 22 and a second connection portion 23 are respectively formed at positions close to both ends of the second exhaust gas passage. The outer wall of the second adapter portion has a cylindrical second adapter surface 221, and the inner wall of the second connection portion has a cylindrical second mating surface 231;

[0034] Referring to Figure 2 , in the natural state, the diameter of the first mating surface is the same as or slightly smaller than the diameter of the second mating surface. When the second connection portion 23 is inserted into the inner side of the first connection portion 13, the first mating surface and the second mating surface can be attached and form a sealed connection. At the same time, the first exhaust gas passage and the second exhaust gas passage are integrally connected;

[0035] Referring to Figure 3, when the present utility model is in use, the first adapter part of the first adapter 1 is inserted into the interior of the automobile tail pipe 3. Since the first adapter surface is in a frustum structure, when the inner diameter of the automobile tail pipe is between the maximum radius and the minimum radius of the frustum structure, there will always be a matching area corresponding to the inner diameter size of the automobile tail pipe on the first adapter surface. The first adapter surface can be in contact and cooperate with the automobile tail pipe through this matching area. At the same time, because the first adapter is made of an elastic material, the matching area can deform and be hermetically connected to the automobile tail pipe, enabling the exhaust gas to be completely transferred from the automobile tail pipe to the first exhaust gas passage. The second connecting part of the second adapter 2 is inserted into the inner side of the first connecting part of the first adapter and forms a sealed connection by using the elastic material of the first adapter. The second adapter part provides an installation site for the rubber sleeve 4, enabling the exhaust gas to be transported to the detection device through the rubber sleeve.

[0036] In order to ensure airtightness of the present utility model, the connecting part of the two independent components should satisfy that the contact surface of one component is elastic and the contact surface of the other component is rigid. Usually, the simplest way is to design the first connecting piece as a whole made of an elastic material. However, in other embodiments, making part of the first connecting piece elastic and part rigid can also meet the above requirements. For example: elastic layers are provided at the first adapter surface and the second adapter surface of the first connecting piece, and other parts of the first connecting piece are rigid. The two design methods have different advantages. The former is easier to process, and the latter has a non-deformable overall structure and better stability when connecting to the automobile tail pipe.

[0037] Refer to Figure 4 , in a further embodiment of the present embodiment, the second adapter part further includes a first limiting convex block 232. The first limiting convex block has a first abutting surface perpendicularly connected to the second mating surface. When the first adapter and the second adapter are assembled, the first abutting surface abuts against the end of the first adapter part, preventing the second adapter from excessively squeezing the first adapter from the inside and preventing damage to the first adapter.

[0038] Refer to Figure 5 , in a further embodiment of the present embodiment, a first annular sealing part 233 that protrudes outward relative to the second mating surface and extends circumferentially around the second mating surface is provided in the middle of the second mating surface. When the second connecting part is inserted into the inner side of the first connecting part, a greater pressure will be formed between the first annular sealing part 233 and the first connecting surface, improving the connection stability between the first adapter and the second adapter. And in some cases, the protruding structure formed by the first annular sealing part also provides a fixing site for the hoop. If necessary, a hoop can also be bound outside the first connecting part to improve airtightness and connection stability. Similarly, a second annular sealing part 222 with a similar structure can also be provided on the second adapter surface.

[0039] Refer to Figure 6, in a further implementation manner of this embodiment, the second adapter further includes an external connection portion 24 disposed between the second connection portion and the second connection part. The external connection portion includes a mounting base block 241 and a pull ring 242. The mounting base block has a mounting hole, and the pull ring is movably connected to the mounting base block through the mounting hole. An external pull hole is formed in the middle of the pull ring. Refer to Figure 7 , when the utility model is in use, the pull ring can be connected to a strap, and an axial pulling force is applied to the second adapter through the strap, so that the connection between the second adapter and the first adapter and the connection between the first adapter and the automobile tail pipe are made more tight, improving the connection stability and air tightness.

[0040] Embodiment 2

[0041] Refer to Figure 7 , the utility model provides an automobile exhaust gas adapter device, which includes a first adapter made of an elastic material and a second adapter made of a rigid material. Different from Embodiment 1, in this embodiment, the first mating surface 131 is formed by the outer wall of the first connection part, and the second mating surface is formed by the inner wall of the second connection part. When the first adapter and the second adapter are assembled, the first connection part is inserted into the inside of the second connection part, so that the first mating surface and the second mating surface are attached to form a sealed connection.

[0042] Refer to Figure 8 , in a further implementation manner, the first connection part further includes a second limiting convex block protruding relative to the first mating surface. The second limiting convex block has a second abutting surface perpendicularly connected to the first mating surface. When the first adapter and the second adapter are assembled, the second abutting surface abuts against the end of the second connection part, preventing the first connection part from being inserted too deep.

[0043] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An automobile tail pipe adapter, characterized in that: It includes a first adapter made of at least partially elastic material and a second adapter made of rigid material; a through first tail gas channel is formed in the middle of the first adapter, a first adapter part and a first connection part are respectively formed at positions close to both ends of the first tail gas channel, the outer wall of the first adapter part has a first adapter surface in the shape of a frustum of a cone with an outer diameter gradually decreasing towards the end, and the first connection part has an annular first mating surface; a through second tail gas channel is formed in the middle of the second adapter, a second adapter part and a second connection part are respectively formed at positions close to both ends of the second tail gas channel, the outer wall of the second adapter part has a cylindrical second adapter surface, and the second connection part has an annular second mating surface that can be hermetically sleeved with the first mating surface.

2. The automotive tailpipe adapter device according to claim 1, characterized in that: The first mating surface is formed by the inner wall of the first connection part, and the second mating surface is formed by the outer wall of the second connection part.

3. The automotive tailpipe adapter device according to claim 2, wherein: The second connection part further includes a first limiting convex block protruding relative to the second mating surface, and the first limiting convex block has a first abutting surface vertically connected to the second mating surface.

4. The automotive tailpipe adapter device according to claim 2, characterized in that: At least one first annular sealing part protruding outward relative to the second mating surface and extending circumferentially around the second mating surface is provided in the middle of the second mating surface.

5. The automotive tailpipe adapter device according to claim 2, wherein: At least one second annular sealing part protruding outward relative to the second adapter surface and extending circumferentially around the second adapter surface is provided in the middle of the second adapter surface.

6. The automotive tailpipe adapter device according to claim 1, characterized in that: The second adapter further includes an external connection part provided between the second adapter part and the second connection part, and the external connection part has an external pulling hole.

7. The automotive tailpipe adapter device according to claim 6, wherein: The external connection part includes a mounting base block and a pulling ring formed with the external pulling hole, the mounting base block is provided with a mounting hole, and the pulling ring passes through the mounting hole and is movably connected to the mounting base block.

8. The automotive tailpipe adapter device according to claim 1, wherein: The first mating surface is formed by the outer wall of the first connection part, and the second mating surface is formed by the inner wall of the second connection part.

9. The automotive tailpipe adapter device according to claim 8, characterized in that: The first connection part further includes a second limiting convex block protruding relative to the first mating surface, and the second limiting convex block has a second abutting surface vertically connected to the first mating surface.

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