Automobile exhaust pipe

Abstract

The utility model discloses an automobile exhaust pipe which comprises a three-way catalyst embedded in an exhaust pipe body, and the left end and the right end of the three-way catalyst are correspondingly matched with the left inner wall and the right inner wall of the exhaust pipe body in an embedded mode respectively. Wherein the left inner wall of the exhaust pipe body is provided with a plurality of left bending elastic sheets which are distributed at intervals in the circumferential direction, and each left bending elastic sheet is correspondingly and elastically clamped with the left end of the three-way catalyst in the circumferential direction; a plurality of right bent elastic pieces distributed at intervals in the circumferential direction are arranged on the right inner wall of the exhaust pipe body, and the right bent elastic pieces are correspondingly and elastically connected with the right end of the three-way catalyst in the circumferential direction in a clamped mode. According to the automobile exhaust pipe, the three-way catalyst is not prone to being broken in the automobile exhaust pipe body, the installation service life of the three-way catalyst in the automobile exhaust pipe body is guaranteed, and the follow-up maintenance cost of the automobile exhaust pipe is reduced.

Description

Technical Field

[0001] The utility model belongs to the field of exhaust pipe manufacturing, and particularly relates to an automobile exhaust pipe. Background Art

[0002] The three-way catalytic converter is a key component for an automobile exhaust pipe to purify tail gas. After purification by the three-way catalytic converter, the gas is discharged externally. In the current technology, most of the carriers of the three-way catalytic converter adopt porous ceramic parts, which are fragile in nature. And since the three-way catalytic converter is fixedly embedded and installed in the pipe body of the exhaust pipe, there is a clearance fixed fit between the two during initial installation. However, with the long-term operation of the automobile exhaust pipe, the temperature will rise, and the three-way catalytic converter itself will expand to a certain extent, and gradually change to an interference fit with the pipe body of the exhaust pipe. At the same time, with the vibration of the automobile during driving, it is easy to cause the three-way catalytic converter to be damaged and ineffective and need to be replaced, reducing the service life of the automobile exhaust pipe and significantly increasing the application cost of the automobile exhaust pipe.

[0003] Therefore, the applicant hopes to seek a technical solution to solve the above technical problems. Summary of the Invention

[0004] In view of this, the purpose of the utility model is to provide an automobile exhaust pipe, so that the three-way catalytic converter is not easily broken in the pipe body of the automobile exhaust pipe, ensuring the installation service life of the three-way catalytic converter in the pipe body of the automobile exhaust pipe and reducing the subsequent maintenance cost of the automobile exhaust pipe.

[0005] The technical solution adopted by the utility model is as follows:

[0006] An automobile exhaust pipe includes a three-way catalytic converter embedded in the pipe body of the exhaust pipe. The left end and the right end of the three-way catalytic converter are respectively in corresponding embedded fit with the left inner wall and the right inner wall of the pipe body of the exhaust pipe. Among them,

[0007] The left inner wall of the pipe body of the exhaust pipe is provided with a plurality of left bending elastic sheets distributed at circumferential intervals. Each of the left bending elastic sheets is elastically clamped with the left end of the three-way catalytic converter in the circumferential direction.

[0008] The right inner wall of the pipe body of the exhaust pipe is provided with a plurality of right bending elastic sheets distributed at circumferential intervals. Each of the right bending elastic sheets is elastically clamped with the right end of the three-way catalytic converter in the circumferential direction.

[0009] Preferably, the left bending elastic sheets and the right bending elastic sheets are symmetrically distributed in the left-right direction in the pipe body of the exhaust pipe. Among them, the left bending elastic sheet includes a flat sheet unit and an elastic bending unit connected integrally. The flat sheet unit is fixedly welded to the corresponding inner wall, and the elastic bending unit is elastically clamped with the left end of the three-way catalytic converter.

[0010] Preferably, the left bending elastic sheet further includes an axial limiting unit integrally connected to the flat sheet unit, and the axial limiting unit is used to axially limit the left end of the three-way catalytic converter.

[0011] Preferably, the axial limiting unit and the elastic bending unit are located on the same side of the flat sheet unit; wherein, the axial limiting unit is bent upward vertically relative to the flat sheet unit.

[0012] Preferably, the elastic bending unit includes a first elastic bending sheet connected to the flat sheet unit, and the first elastic bending sheet is connected with a second elastic bending sheet; wherein, the first elastic bending sheet and the second elastic bending sheet are elastically connected in a bent shape, and the bending angle formed between the two is 140-160°.

[0013] Preferably, the first elastic bending sheet is elastically connected to the flat sheet unit in a bent shape, and the bending angle formed between the first elastic bending sheet and the flat sheet unit is 165-175°.

[0014] Preferably, the left bending elastic sheet is fixedly welded to the left inner wall of the exhaust pipe body, and the right bending elastic sheet is fixedly welded to the right inner wall of the exhaust pipe body.

[0015] Preferably, the number of the left bending elastic sheets is 3-5, and the number of the right bending elastic sheets is 3-5.

[0016] Preferably, the exhaust pipe body includes a left pipe body and a right pipe body welded together, and a plurality of left bending elastic sheets are fixedly arranged on the inner wall of the left pipe body at circumferentially spaced intervals, and a plurality of right bending elastic sheets are fixedly arranged on the inner wall of the right pipe body at circumferentially spaced intervals.

[0017] Preferably, the carrier of the three-way catalytic converter is a porous ceramic part.

[0018] In this application, a plurality of left bending elastic sheets are arranged on the left inner wall of the exhaust pipe body at circumferentially spaced intervals, and at the same time, a plurality of right bending elastic members are arranged on the right inner wall of the exhaust pipe body at circumferentially spaced intervals. Each left bending elastic sheet is elastically clamped with the left end of the three-way catalytic converter in the circumferential direction, and each right bending elastic sheet is elastically clamped with the right end of the three-way catalytic converter in the circumferential direction. In actual application, as the exhaust pipe of the automobile works for a long time, the temperature will rise, and the three-way catalytic converter itself will expand or the automobile will vibrate during driving. The elastic clamping area will provide elastic space to avoid forming an interference fit pressure on the three-way catalytic converter, so that the three-way catalytic converter is not easily broken in the exhaust pipe body of the automobile, ensuring the installation service life of the three-way catalytic converter in the exhaust pipe body of the automobile and reducing the subsequent maintenance cost of the automobile exhaust pipe. Brief Description of the Drawings

[0019] Figure 1 is a schematic structural view of an automobile exhaust pipe under the specific embodiment of the present application;

[0020] Figure 2 is Figure 1 a sectional view of;

[0021] Figure 3 is Figure 1 a schematic exploded view of;

[0022] Figure 4 is a schematic structural view of the left pipe body under the specific embodiment of the present application;

[0023] Figure 5 is a schematic structural view of the left bending elastic piece under the specific embodiment of the present application. Specific Embodiment

[0024] This embodiment provides an automobile exhaust pipe, which includes a three-way catalytic converter embedded in the exhaust pipe body. The left end and the right end of the three-way catalytic converter are respectively embedded and fitted with the left inner wall and the right inner wall of the exhaust pipe body; wherein, a plurality of left bending elastic pieces are arranged on the left inner wall of the exhaust pipe body at circumferentially spaced intervals, and each left bending elastic piece is elastically clamped with the left end of the three-way catalytic converter in the circumferential direction; a plurality of right bending elastic pieces are arranged on the right inner wall of the exhaust pipe body at circumferentially spaced intervals, and each right bending elastic piece is elastically clamped with the right end of the three-way catalytic converter in the circumferential direction.

[0025] In order to enable those skilled in the art to better understand the technical solutions in the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0026] Please refer to Figure 1 、 Figure 2 and Figure 3 as shown, an automobile exhaust pipe includes a three-way catalytic converter 1 embedded in the exhaust pipe body. The left end and the right end of the three-way catalytic converter 1 are respectively embedded and fitted with the left inner wall and the right inner wall of the exhaust pipe body; preferably, please further refer to Figure 4As shown, in this embodiment, the carrier of the three-way catalytic converter 1 is a porous ceramic part, which is a well-known structure; the exhaust pipe body includes a left pipe body 2 and a right pipe body 3 welded together. On the inner wall of the left pipe body 1, a plurality of left bending elastic pieces 4 are fixedly arranged at circumferential intervals, and each left bending elastic piece 4 is elastically clamped with the left end of the three-way catalytic converter 1 in the circumferential direction; on the inner wall of the right pipe body 3, a plurality of right bending elastic pieces 5 are fixedly arranged at circumferential intervals, and each right bending elastic piece 5 is elastically clamped with the right end of the three-way catalytic converter 1 in the circumferential direction;

[0027] Preferably, in this embodiment, the left bending elastic pieces 4 are fixedly welded to the left inner wall of the left pipe body 2, and the right bending elastic pieces 5 are fixedly welded to the right inner wall of the right pipe body 3; preferably, in this embodiment, the number of the left bending elastic pieces 4 is 3-5, and the number of the right bending elastic pieces 5 is 3-5. Specifically preferably, in this embodiment, the number of the left bending elastic pieces 4 is 3, and the number of the right bending elastic pieces 5 is 3;

[0028] Preferably, please further refer to Figure 5 As shown, in this embodiment, the left bending elastic pieces 4 and the right bending elastic pieces 5 are symmetrically distributed in the left-right direction within the exhaust pipe body, and the structural solutions are the same; among them, the left bending elastic piece 4 includes a flat piece unit 41 and an elastic bending unit 42 connected integrally. The flat piece unit 41 is fixedly welded to the inner wall of the corresponding left pipe body 2, and the elastic bending unit 42 is elastically clamped with the left end of the three-way catalytic converter 1; further preferably, in this embodiment, the left bending elastic piece 4 further includes an axial limiting unit 43 integrally connected to the flat piece unit 41, and the axial limiting unit 43 is used to limit the left end of the three-way catalytic converter 1 axially. Similarly, correspondingly, the right bending elastic piece 5 is also provided with an axial limiting unit, and the axial limiting unit is used to limit the right end of the three-way catalytic converter 1 axially;

[0029] Further preferably, in order to be beneficial in this embodiment, the axial limiting unit 43 and the elastic bending unit 42 are located on the same side of the flat piece unit 41; among them, the axial limiting unit 43 is bent upward perpendicular to the flat piece unit 41;

[0030] Further preferably, in order to achieve an excellent elastic snap - fit effect, in the present embodiment, the elastic bending unit 42 includes a first elastic bending piece 42a connected to the flat sheet unit 41, and the first elastic bending piece 42a is connected to a second elastic bending piece 42b; wherein, the first elastic bending piece 42a and the second elastic bending piece 42b are elastically connected in a bent shape, and the bending angle formed therebetween is 140 - 160° (specifically set to 156° in this embodiment); preferably, in order to achieve a more excellent elastic snap - fit effect, in the present embodiment, the first elastic bending piece 42a and the flat sheet unit 41 are elastically connected in a bent shape, and the bending angle formed between the first elastic bending piece 42a and the flat sheet unit 41 is 165 - 175° (specifically set to 168° in this embodiment).

[0031] In this embodiment, a plurality of left - bending elastic pieces 4 are arranged at circumferentially spaced intervals on the inner wall of the left pipe body 2, and at the same time, a plurality of right - bending elastic members 5 are arranged at circumferentially spaced intervals on the inner wall of the right pipe body 3. Each left - bending elastic piece 4 is elastically snap - fitted with the left end of the three - way catalytic converter 1 in the circumferential direction, and each right - bending elastic piece 5 is elastically snap - fitted with the right end of the three - way catalytic converter 1 in the circumferential direction. In actual application, as the automobile exhaust pipe works for a long time, the temperature will rise, and the three - way catalytic converter 1 itself will expand or the automobile will vibrate during driving. The elastic snap - fit area can provide elastic space to avoid forming an interference - fit pressure on the three - way catalytic converter 1, so that the three - way catalytic converter 1 is not easily broken in the automobile exhaust pipe body, ensuring the installation service life of the three - way catalytic converter 1 in the automobile exhaust pipe body and reducing the subsequent maintenance cost of the automobile exhaust pipe.

[0032] For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above - mentioned exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic characteristics of the present utility model. Therefore, from any point of view, the embodiments should be regarded as exemplary and non - restrictive. The scope of the present utility model is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present utility model. Any reference signs in the claims should not be regarded as limiting the claimed rights.

[0033] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An automobile exhaust pipe, comprising a three-way catalytic converter embedded in the exhaust pipe body, characterized in that, The left end and the right end of the three-way catalytic converter are respectively fitted and engaged with the left inner wall and the right inner wall of the exhaust pipe body; wherein, The left inner wall of the exhaust pipe body is provided with a plurality of left bending elastic pieces which are circumferentially spaced apart, and each of the left bending elastic pieces is elastically clamped with the left end of the three-way catalytic converter in the circumferential direction; The right inner wall of the exhaust pipe body is provided with a plurality of right bending elastic pieces which are circumferentially spaced apart, and each of the right bending elastic pieces is elastically clamped with the right end of the three-way catalytic converter in the circumferential direction.

2. The automotive exhaust pipe according to claim 1, characterized in that, The left bending elastic pieces and the right bending elastic pieces are symmetrically distributed in the left-right direction within the exhaust pipe body; wherein, each left bending elastic piece includes a flat piece unit and an elastic bending unit which are integrally connected, the flat piece unit is fixedly welded to the corresponding inner wall, and the elastic bending unit is elastically clamped with the left end of the three-way catalytic converter.

3. The automotive exhaust pipe according to claim 2, wherein, Each left bending elastic piece further includes an axial limiting unit which is integrally connected with the flat piece unit, and the axial limiting unit is used for axially limiting the left end of the three-way catalytic converter.

4. The automobile exhaust pipe according to claim 3, characterized in that, The axial limiting unit and the elastic bending unit are located on the same side of the flat piece unit; wherein, the axial limiting unit is bent upward and perpendicularly with respect to the flat piece unit.

5. The motor vehicle exhaust pipe according to claim 2 or 3 or 4, characterized in that, The elastic bending unit includes a first elastic bending piece connected to the flat piece unit, and the first elastic bending piece is connected with a second elastic bending piece; wherein, the first elastic bending piece and the second elastic bending piece are elastically connected in a bent shape, and the bending angle formed therebetween is 140-160°.

6. The motor vehicle exhaust pipe according to claim 5, characterized in that, The first elastic bending piece is elastically connected to the flat piece unit in a bent shape, and the bending angle formed between the first elastic bending piece and the flat piece unit is 165-175°.

7. The automotive exhaust pipe according to claim 1, wherein, The left bending elastic pieces are fixedly welded to the left inner wall of the exhaust pipe body, and the right bending elastic pieces are fixedly welded to the right inner wall of the exhaust pipe body.

8. The automotive exhaust pipe according to claim 1 or 7, characterized in that, The number of the left bending elastic pieces is 3-5, and the number of the right bending elastic pieces is 3-5.

9. The automotive exhaust pipe according to claim 1, wherein, The exhaust pipe body includes a left pipe body and a right pipe body which are welded together. The inner wall of the left pipe body is fixedly provided with a plurality of left bending elastic pieces which are circumferentially spaced apart, and the inner wall of the right pipe body is fixedly provided with a plurality of right bending elastic pieces which are circumferentially spaced apart.

10. The motor vehicle exhaust pipe according to claim 1, characterized in that, The carrier of the three-way catalytic converter is a porous ceramic part.

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