Catalytic converter, supercharger assembly and vehicle

Abstract

The utility model discloses a catalytic converter and supercharger assembly and a vehicle, the catalytic converter and supercharger assembly comprises a catalytic converter, the catalytic converter is provided with a first flange, and the first flange is provided with a first rotary connecting part; and the supercharger is provided with a second flange, the second flange is provided with a second rotary connecting part, and the first rotary connecting part and the second rotary connecting part are suitable for being in axial insertion connection and then relatively rotate so as to be clamped and fixed. According to the catalyst and supercharger assembly provided by the embodiment of the utility model, when the catalyst and the supercharger are mounted, after the first rotary connecting part and the second rotary connecting part are inserted, the first rotary connecting part rotates relative to the second rotary connecting part, so that the positioning and assembling operations of the first flange and the second flange can be completed, and the whole operation is time-saving and labor-saving.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicles, in particular to a catalyst and supercharger assembly and a vehicle. Background Art

[0002] The catalyst is an indispensable part of the automobile exhaust system. It can eliminate pollutants harmful to the environment in automobile exhaust and plays an important role in environmental protection. At the same time, the catalyst also directly affects whether the exhaust emissions of the entire vehicle can meet the national emission regulations. At present, various automobile OEMs mostly use clamp flange connection to connect the catalyst and the supercharger. This connection method has better sealing performance than bolt and nut connection, which is conducive to preventing exhaust gas leakage before being purified by the catalyst.

[0003] Since the catalyst flange and the supercharger flange are both smooth surfaces without positioning structures, when installing the catalyst, one person is required to lift the catalyst to align the catalyst flange with the supercharger flange, and another person is required to pre-bring clamp bolts. Generally, the positioning support bracket at the rear of the catalyst needs to be installed in place before returning to tighten the clamp bolts, which makes the assembly labor-intensive and cumbersome. Utility Model Content

[0004] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, one purpose of the utility model is to provide a catalyst and supercharger assembly, when installing the catalyst and the supercharger, after the first rotating connection part is plugged into the second rotating connection part and the first rotating connection part is rotated relative to the second rotating connection part, the positioning and assembly operations of the first flange and the second flange can be completed, saving time and labor.

[0005] According to the embodiment of the utility model, the catalyst and supercharger assembly includes: a catalyst, the catalyst is provided with a first flange, the first flange is provided with a first rotating connection part; a supercharger, the supercharger is provided with a second flange, the second flange is provided with a second rotating connection part, the first rotating connection part is suitable for relative rotation with the second rotating connection part after axial insertion for clamping and fixing.

[0006] According to the catalyst and supercharger assembly of the embodiment of the utility model, when installing the catalyst and the supercharger, the first rotating connection part is plugged into the second rotating connection part and the first rotating connection part is rotated relative to the second rotating connection part to complete the positioning and assembly operations of the first flange and the second flange, and the entire operation saves time and effort.

[0007] According to the catalyst and supercharger assembly of the embodiment of the utility model, the first rotating connection part includes a connected axial extension part and a limiting part, the axial extension part extends along the axial direction of the first flange and the limiting part extends along the circumferential direction, the second rotating connection part includes a connected plug interface and a rotation positioning part, the plug interface extends along the axial direction of the second flange, and the rotation positioning part is connected to the plug interface and extends along the circumferential direction of the second flange relative to the plug interface, the first rotating connection part is plugged into the plug interface and the limiting part and the rotation positioning part are positioned when rotating.

[0008] According to the catalyst and supercharger assembly of the embodiment of the utility model, the rotation positioning portion is configured as a positioning groove, the first rotation connection portion is inserted along the plug interface and the limiting portion is clamped in the positioning groove when the first rotation connection portion rotates.

[0009] According to the catalyst and supercharger assembly of the embodiment of the utility model, the first rotating connection part includes a first cylinder and a second cylinder that are axially connected to each other, the axially extending parts of the first cylinder and the second cylinder form the axial extension part, and the diameter of the second cylinder is larger than the diameter of the first cylinder to constitute the limiting part; the plug-in interface includes a first circular mouth, the rotating positioning part is a second circular mouth, the second circular mouth and the first circular mouth intersect, the first rotating connection part extends into the first circular mouth and the first cylinder is clamped at the second circular mouth.

[0010] According to the catalyst and supercharger assembly of the embodiment of the utility model, the depth of the second circular opening in the axial direction of the second flange is less than the depth of the first circular opening, and the second flange is provided with a third circular opening at a position where the second circular opening is away from the first rotating connection portion, and the diameter of the third circular opening is greater than the diameter of the second circular opening to form a lap joint, and the first column is clamped in the second circular opening and the second column is lap jointed in the lap joint.

[0011] According to the catalyst and supercharger assembly of the embodiment of the utility model, the first flange also includes a positioning piece, and the second flange includes a positioning hole. The positioning piece extends into the positioning hole to position the first flange and the second flange, and the first rotating connection part is rotated and clamped relative to the second rotating connection part with the positioning piece as the central axis.

[0012] According to the catalyst and supercharger assembly of the embodiment of the utility model, the positioning member and the first rotating connection portion are opposite to each other along the radial direction of the first flange, and the positioning hole and the second rotating connection portion are opposite to each other along the radial direction of the second flange.

[0013] According to the catalyst and supercharger assembly of the embodiment of the utility model, at least one of the first flange and the second flange is provided with a circumferentially extending groove, a seal is arranged in the groove, and the first flange and the second flange are suitable for squeezing the seal when connected.

[0014] The catalyst and supercharger assembly according to the embodiment of the utility model further includes a clamp, which is sleeved on the outer circumference of the first flange and the second flange and is suitable for fastening and sealing the first flange and the second flange.

[0015] The embodiment of the utility model discloses a vehicle, comprising the above-mentioned catalyst and supercharger assembly.

[0016] The advantages of the vehicle described above over the prior art are the same as the advantages of the catalyst and supercharger assembly described above over the prior art, and are not described in detail here.

[0017] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0019] Figure 1 It is an exploded view of the connection structure of the catalyst and the supercharger assembly of the embodiment of the utility model;

[0020] Figure 2 This is a schematic structural diagram of a first flange in an embodiment of the utility model;

[0021] Figure 3 This is a schematic structural diagram of a second flange in one embodiment of the utility model;

[0022] Figure 4 It is a partial schematic diagram of a second flange of an embodiment of the utility model, which is away from the first flange;

[0023] Figure 5 This utility model Figure 4 A magnified view of point A;

[0024] Figure 6 It is a side view of a first flange and a second flange of an embodiment of the utility model after being fixed by a clamp;

[0025] Figure 7 This utility model Figure 6 A partial cross-sectional view of

[0026] Figure 8It is a structural schematic diagram of another embodiment of the utility model.

[0027] Reference numerals:

[0028] Catalyst 1, first flange 2, first rotating connection portion 21, first column 211, second column 212, positioning piece 22, axial extension portion 23, limiting portion 24, supercharger 3, second flange 4, second rotating connection portion 41, second circular opening 411, first circular opening 412, third circular opening 413, overlapping portion 414, positioning hole 42, groove 43, plug-in port 44, rotating positioning portion 45, clamp 5, bolt 51, sealing member 6. DETAILED DESCRIPTION

[0029] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0030] Reference below Figure 1-Figure 8 Describing the catalyst and supercharger assembly of the embodiment of the utility model, when connecting the catalyst 1 with the supercharger 3, the catalyst 1 and the supercharger 3 can be first positioned and installed, and the first rotating connection part 21 and the second rotating connection part 41 are plugged in and the first rotating connection part 21 is rotated relative to the second rotating connection part 41 to complete the positioning and assembly operations of the first flange 2 and the second flange 4. After the first rotating connection part 21 and the second rotating connection part 41 are connected, it is not easy to fall out. Finally, on the basis of the positioning and installation connection, the next step of tightening and sealing is carried out, which can be completed quickly by one person, saving time and effort.

[0031] like Figure 1-8 As shown, the catalyst 1 and supercharger 3 assembly of the embodiment of the utility model includes: a catalyst 1 and a supercharger 3.

[0032] The catalyst 1 is provided with a first flange 2, the first flange 2 is provided with a first rotating connection part 21, the supercharger 3 is provided with a second flange 4, the second flange 4 is provided with a second rotating connection part 41, and the first rotating connection part 21 is suitable for relative rotation with the second rotating connection part 41 after axial insertion for clamping and fixing.

[0033] In practice, the catalyst 1 and the supercharger 3 are both important components of the engine. The function of the catalyst 1 is to convert harmful gases such as carbon monoxide, hydrocarbons and nitrogen oxides discharged from the exhaust gas of the vehicle into harmless carbon dioxide, water and nitrogen through oxidation and reduction. The catalyst 1 and the supercharger 3 are connected so that the vehicle exhaust gas can be better discharged. When the catalyst 1 and the supercharger 3 are installed, the first flange 2 is connected to the end of the catalyst 1, and the second flange 4 is connected to the end of the supercharger 3, and the first flange 2 and the second flange 4 are connected to connect the catalyst 1 and the supercharger 3.

[0034] In practice, a first rotating connection part 21 is provided on the surface facing the first flange 2 and the second flange 4, and a second rotating connection part 41 is provided at the second flange 4 of the supercharger 3. When the first flange 2 and the second flange 4 are connected, the first rotating connection part 21 is inserted into the second rotating connection part 41 for preliminary positioning. For example, the first flange 2 is rotated counterclockwise relative to the second flange 4 so that the first rotating connection part 21 is clamped in the second rotating connection part 41. Specifically, the first rotating connection part 21 is suitable for being inserted into the second rotating connection part 41, and when rotating counterclockwise, the local structure of the first rotating connection part 21 cooperates with the local structure in the second rotating connection part 41 to clamp the first rotating connection part 21 and the second rotating connection part 41, so as to prevent the first rotating connection part 21 and the second rotating connection part 41 from loosening after rotation, thereby preliminarily connecting the catalyst 1 and the supercharger 3. When disassembling, the first rotating connection part 21 can be rotated clockwise relative to the second rotating connection part 41 for disassembly.

[0035] Therefore, when the catalyst 1 of the embodiment of the utility model is connected to the supercharger 3, the first flange 2 and the second flange 4 can be positioned and assembled after the first rotating connection part 21 is plugged into the second rotating connection part 41 and the first rotating connection part 21 is rotated relative to the second rotating connection part 41. The positioning and assembly connection are convenient, which is convenient for further sealing at a later stage and can be completed quickly by one person, saving time and effort.

[0036] In some embodiments, the first rotating connection portion 21 may include a connected axial extension portion 23 and a limiting portion 24, the axial extension portion 23 extends along the axial direction of the first flange 2 and the limiting portion 24 extends circumferentially, the second rotating connection portion 41 includes a connected plug interface 44 and a rotation positioning portion 45, the plug interface 44 extends along the axial direction of the second flange 4, and the rotation positioning portion 45 is connected to the plug interface 44 and extends circumferentially along the second flange 4 relative to the plug interface 44, the first rotating connection portion 21 is plugged into the plug interface 44 and the limiting portion 24 is positioned with the rotation positioning portion 45 during rotation.

[0037] In practice, the first rotating connection part 21 is plugged into the plug-in port 44, and continues to approach the second flange 4 axially along with the axial extension part 23 and the limiting part 24, the first rotating connection part 21 is rotated and the limiting part 24 is located at the position of the rotating positioning part 45, and when the first flange 2 is rotated, the limiting part 24 is connected or limited in the rotating positioning part 45, so that the limiting part 24 can be clamped in the position of the rotating positioning part 45 of the second flange 4, thereby ensuring the positioning between the first flange 2 and the second flange 4.

[0038] In some embodiments, the rotation positioning portion 45 is configured as a positioning groove, the first rotation connection portion 21 is inserted along the insertion port 44 and the limiting portion 24 is stuck in the positioning groove when the first rotation connection portion 21 rotates.

[0039] Among them, when the rotation positioning portion 45 is constructed as a positioning groove, the side of the positioning groove close to the first flange 2 and the side away from the first flange 2 press the limiting portion 24 axially into the rotation positioning portion 45, so that the first flange 2 and the second flange 4 are initially positioned axially. At this time, the limiting portion 24 and the positioning groove have an interference fit, and the positioning connection between the first flange 2 and the second flange 4 can be maintained without applying external force. The limiting portion 24 is clamped by setting the positioning groove, and the structure is simple and easy to set.

[0040] Furthermore, when the rotation positioning portion 45 extends circumferentially, that is, when the positioning groove extends circumferentially, the positioning groove may have a certain curvature, and the entrance height of the positioning groove may be set higher than the height of the circumferential pressing position of the positioning groove and the limiting portion 24. Through the setting of this curvature, when the limiting portion 24 is rotated into the interior of the rotation positioning portion 45, it is not easy to fall out without applying external force.

[0041] In some embodiments, the first rotating connection portion 21 includes a first cylinder 211 and a second cylinder 212 that are axially connected to each other, and the axially extending portions of the first cylinder 211 and the second cylinder 212 form the above-mentioned axial extension portion 23. The diameter of the second cylinder 212 is greater than the diameter of the first cylinder 211 to constitute the above-mentioned limiting portion 24; the plug-in port 44 includes a first circular opening 412, and the rotating positioning portion 45 is a second circular opening 411. The second circular opening 411 and the first circular opening 412 intersect, and the first rotating connection portion 21 extends into the first circular opening 412 and the first cylinder 211 is clamped at the second circular opening 411.

[0042] In practice, the diameter of the second cylinder 212 is larger than the diameter of the first cylinder 211. When the first cylinder 211 and the second cylinder 212 are axially connected, the second cylinder 212 can extend circumferentially to limit the position. For example, the diameter of the first cylinder 211 is 4 mm and the height is 4 mm, and the diameter of the second cylinder 212 is 6 mm and the height is 2 mm. At this time, the first rotating connection part 21 is formed by the intersection of the first circular opening 412 and the second circular opening 411, and the first circular opening 412 serves as the above-mentioned plug-in port 44, through which the first rotating connection part 21 can be extended, and the diameter of the first circular opening 412 is smaller than the diameter of the second circular opening 411, for example, the diameter of the first circular opening 412 is 4.5 mm, and the diameter of the second circular opening 411 is 6.5 mm.

[0043] Reference Figure 2 and Figure 3 As shown, after the first rotating connection part 21 extends into the first circular opening 412, the catalyst 1 is rotated, that is, the first flange 2 is rotated relative to the second flange 4, so that the first column 211 is squeezed into the first circular opening 412 and then clamped at the first circular opening 412. The first rotating connection part 21 can be set as an intersecting circular hole to achieve positioning, the structure is simpler and convenient to set up; in practice, the position where the first rotating connection part 21 and the second rotating connection part 41 contact can be set to rubber material, so that it is convenient for the first column 211 to squeeze into the first circular opening 412 when it rotates circumferentially.

[0044] In some embodiments, the depth of the second circular opening 411 in the axial direction of the second flange 4 is less than the depth of the first circular opening 412, and the second flange 4 is provided with a third circular opening 413 at a position where the second circular opening 411 is away from the first rotating connection portion 21, and the diameter of the third circular opening 413 is greater than the diameter of the second circular opening 411 to form a lap joint 414, and the first column 211 is clamped in the second circular opening 411 and the second column 212 is overlapped in the lap joint 414.

[0045] In practice, the second flange 4 is provided with two intersecting first circular openings 412 and second circular openings 411 on the side facing the first flange 2, and the second flange 4 is provided with a third circular opening 413 on the side facing away from the first flange 2, and the third circular opening 413 and the second circular opening 411 are facing each other, and the diameter of the third circular opening 413 is greater than the diameter of the second circular opening 411. For example, the diameter of the third circular opening 413 is 6.5 mm. At this time, a lap joint 414 can be formed on the side of the second flange 4 facing away from the first flange 2. When the first column 211 and the second column 212 are both extended from the first circular opening 412, the catalyst 1 and the first flange 2 are rotated so that the second column 212 on the first flange 2 overlaps the lap joint 414 to position the first rotating connection portion 21.

[0046] Specific, combined Figure 4 and Figure 5As shown, the minimum distance between the first circular opening 412 and the second circular opening 411 on the side of the second flange 4 facing the first flange 2 is greater than 4 mm, and the diameter of the first column 211 is 4 mm. At this time, it is convenient for the first column 211 with a diameter of 4 mm to pass through the intersection of the first circular opening 412 and the second circular opening 411. Of course, when the first column 211 passes through the intersection of the first circular opening 412 and the second circular opening 411, if an elastic material is provided on the outer wall of the first column 211, the first column 211 can be squeezed into the second circular opening 411, so that the first column 211 is not easy to separate from the intersection of the first circular opening 412 and the second circular opening 411 after entering the second circular opening 411, and the positioning of the first flange 2 and the second flange 4 is completed. At this time, the catalyst 1 and the supercharger 3 are assembled in place. Since the first rotating connection part 21 of the first flange 2 and the second rotating connection part 41 of the second flange 4 are clamped and limited, the catalyst 1 can keep the assembly position without manual lifting, and the worker can directly perform the next step of fastening the first flange 2 and the second flange 4 by one person.

[0047] In some embodiments, the first flange 2 further includes a positioning member 22, and the second flange 4 includes a positioning hole 42. The positioning member 22 extends into the positioning hole 42 to position the first flange 2 and the second flange 4. The first rotating connection part 21 rotates and clamps relative to the second rotating connection part 41 with the positioning member 22 as the central axis.

[0048] In practice, the positioning piece 22 of the first flange 2 can be a cylinder, and the positioning hole 42 can be a circular blind hole. The diameter of the circular blind hole is 4.5 mm and the depth is 6 mm. When the first flange 2 and the second flange 4 need to be positioned and connected, the cylinder is first inserted into the circular blind hole, and the positioning hole 42 is set as a circular blind hole, so that the cylinder can be supported on the bottom of the circular blind hole. At this time, the catalyst 1 and the supercharger 3 are rotated to rotate the first rotating connection part 21 around the center of the cylinder, so that the first rotating connection part 21 is rotated to be engaged and positioned with the second rotating connection part 41.

[0049] Therefore, by setting a positioning piece 22 on the first flange 2 and a positioning hole 42 on the second flange 4, the first rotating connection part 21 and the second rotating connection part 41 can be supported when they are plugged in and rotationally connected, thereby improving the stability and accuracy of the axial plug-in and rotational connection between the first flange 2 and the second flange 4.

[0050] In some embodiments, the positioning member 22 and the first rotating connection portion 21 are opposite to each other along the radial direction of the first flange 2 , and the positioning hole 42 and the second rotating connection portion 41 are opposite to each other along the radial direction of the second flange 4 .

[0051] In practice, when the positioning member 22 is supported in the positioning hole 42, the first rotating connection part 21 can be inserted and rotated relative to the second rotating connection part 41. When the positioning member 22 and the first rotating connection part 21 are radially opposite to each other in the first flange 2, the corresponding positioning hole 42 is radially opposite to the second rotating connection part 41. Then, the position where the positioning member 22 is supported at the positioning hole 42 and the position where the first rotating connection part 21 is connected to the second rotating connection part 41 are symmetrical, so that the force on the first flange 2 of the catalyst 1 and the second flange 4 of the supercharger 3 can be more uniform, that is, the first flange 2 and the second flange 4 are more stable when positioned and connected.

[0052] In some embodiments, at least one of the first flange 2 and the second flange 4 is provided with a circumferentially extending groove 43, and a seal 6 is disposed in the groove 43. The first flange 2 and the second flange 4 are suitable for squeezing the seal 6 when connected.

[0053] In practice, the seal 6 may be a sealing gasket. For example, a circumferentially extending groove 43 is provided in the first flange 2 of the catalyst 1, and the sealing gasket is located in the circumferentially extending groove 43, or a circumferentially extending groove 43 is provided in the second flange 4 of the supercharger 3, and the sealing gasket is located in the circumferentially extending groove 43. When the first flange 2 and the second flange 4 are connected, the sealing gasket is squeezed to seal the connection between the first flange 2 and the second flange 4, thereby preventing the gas in the catalyst 1 and the supercharger 3 from leaking out.

[0054] In some embodiments, the catalyst and supercharger assembly further includes a clamp 5 , which is sleeved on the outer circumference of the first flange 2 and the second flange 4 and is suitable for fastening and sealing the first flange 2 and the second flange 4 .

[0055] In practice, after the first flange 2 and the second flange 4 are connected, the clamp 5 is sleeved on the outer periphery of the first flange 2 and the second flange 4 to tighten and further seal the connection between the first flange 2 and the second flange 4. Specifically, the clamp 5 can be formed by two semicircular clamp bodies facing each other and fixedly connected by bolts 51, which is convenient for disassembly of the clamp 5 and adjustment of the tightness of the clamp 5. The clamp 5 can also be conveniently and reliably connected to the outer periphery of the first flange 2 and the second flange 4, and the connection between the catalyst 1 and the supercharger 3 is sealed and tightened, which can prevent gas leakage and avoid affecting the supercharging effect of the supercharger 3.

[0056] The utility model embodiment also discloses a vehicle, including the above-mentioned catalyst and supercharger assembly. When installing the catalyst 1 and the supercharger 3, one person can complete the assembly operation, and can directly assemble them in place, saving time and labor, and it is more convenient to install, repair and disassemble the catalyst 1 and the supercharger 3 of the vehicle.

[0057] 1. In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation to the present invention.

[0058] 2. In the description of the present utility model, "first feature" and "second feature" may include one or more of these features.

[0059] 3. In the description of this utility model, "plurality" means two or more.

[0060] 4. In the description of the present invention, a first feature “above” or “below” a second feature may include that the first and second features are directly in contact, or may include that the first and second features are not in direct contact but are in contact via another feature between them.

[0061] 5. In the description of the present utility model, the first feature “above”, “above” and “on” the second feature includes the first feature being directly above and diagonally above the second feature, or simply means that the first feature is horizontally higher than the second feature.

[0062] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0063] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A catalyst and supercharger assembly, characterized in that: include: A catalyst, wherein the catalyst is provided with a first flange, and the first flange is provided with a first rotating connection portion; A supercharger, wherein the supercharger is provided with a second flange, the second flange is provided with a second rotating connection portion, and the first rotating connection portion is suitable for relative rotation with the second rotating connection portion after axial insertion for clamping and fixing.

2. The catalyst and supercharger assembly according to claim 1, characterized in that: The first rotating connection portion includes a connected axial extension portion and a limiting portion, the axial extension portion extends along the axial direction of the first flange and the limiting portion extends along the circumferential direction, the second rotating connection portion includes a connected plug interface and a rotation positioning portion, the plug interface extends along the axial direction of the second flange, and the rotation positioning portion is communicated with the plug interface and extends along the circumferential direction of the second flange relative to the plug interface, the first rotating connection portion is plugged into the plug interface and the limiting portion and the rotation positioning portion are positioned during rotation.

3. The catalyst and supercharger assembly according to claim 2, characterized in that: The rotation positioning portion is configured as a positioning groove, the first rotation connection portion is inserted along the plug interface, and the limiting portion is clamped in the positioning groove when the first rotation connection portion rotates.

4. The catalyst and supercharger assembly according to claim 2, characterized in that: The first rotating connection portion includes a first column and a second column that are axially oppositely connected, the axially extending portions of the first column and the second column form the axially extending portion, and the diameter of the second column is greater than the diameter of the first column to form the limiting portion; The plug interface includes a first circular opening, the rotation positioning portion is a second circular opening, the second circular opening intersects with the first circular opening, the first rotation connection portion extends into the first circular opening, and the first column is clamped at the second circular opening.

5. The catalyst and supercharger assembly according to claim 4, characterized in that: The depth of the second circular opening in the axial direction of the second flange is less than the depth of the first circular opening. The second flange is provided with a third circular opening at a position where the second circular opening is away from the first rotating connection portion. The diameter of the third circular opening is greater than the diameter of the second circular opening to form a lap joint. The first column is clamped in the second circular opening and the second column is lap jointed in the lap joint.

6. The catalyst and supercharger assembly according to claim 1, characterized in that: The first flange further includes a positioning member, and the second flange includes a positioning hole. The positioning member extends into the positioning hole to position the first flange and the second flange. The first rotating connection part is rotated and clamped relative to the second rotating connection part with the positioning member as the central axis.

7. The catalyst and supercharger assembly according to claim 6, characterized in that: The positioning member and the first rotating connection portion are directly opposite to each other along the radial direction of the first flange, and the positioning hole and the second rotating connection portion are directly opposite to each other along the radial direction of the second flange.

8. The catalyst and supercharger assembly according to claim 1, characterized in that: At least one of the first flange and the second flange is provided with a circumferentially extending groove, a sealing member is arranged in the groove, and the first flange and the second flange are suitable for squeezing the sealing member when connected.

9. The catalyst and supercharger assembly according to claim 1, characterized in that: It also includes a clamp, which is sleeved on the outer circumference of the first flange and the second flange and is suitable for fastening and sealing the first flange and the second flange.

10. A vehicle, characterized in that: The invention comprises the catalyst and supercharger assembly as claimed in any one of claims 1 to 9.

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