Exhaust structure of motorcycle

Abstract

The utility model provides an exhaust structure of a motorcycle, and belongs to the technical field of motorcycles. The motorcycle exhaust pipe solves the problem that an existing motorcycle exhaust pipe is prone to scalding. The exhaust structure of the motorcycle comprises a frame, an engine and an exhaust pipe, the engine is fixedly arranged on the frame, an exhaust port is formed in the front end of the engine, a receding groove formed in the length direction of the frame is formed in the bottom of the engine, one end of the exhaust pipe is connected with the exhaust port, and the other end of the exhaust pipe extends downwards and penetrates out of the receding groove backwards. The exhaust pipe is hidden in the automobile body, so that a human body is prevented from being scalded due to contact with the exhaust pipe in the daily use process, and the exhaust pipe can be prevented from being collided.

Description

Technical Field

[0001] The utility model belongs to the technical field of motorcycles and relates to an exhaust structure of a motorcycle. Background Art

[0002] Motorcycles are a widely used means of transportation. During use, exhaust gas generated by engine combustion is discharged through the exhaust pipe. Since the exhaust gas is burned and reaches a high temperature, long-term driving can cause the exhaust pipe temperature to rise significantly, reaching 300°C in the front section, 150°C in the middle section, and even close to 100°C in the rear section. Currently, most motorcycle exhaust pipes are located on the side of the vehicle body, such as the motorcycle exhaust structure with an oxygen sensor disclosed in Chinese patent application (application number: 202310733896.3). This can easily cause burns if not handled with care. Furthermore, the side location of the exhaust pipe can easily lead to damage from collisions. Summary of the Invention

[0003] The purpose of the utility model is to solve the above problems in the existing technology and propose an exhaust structure for a motorcycle. The technical problem to be solved by the utility model is: how to prevent the exhaust pipe from causing burns to people.

[0004] The purpose of the utility model can be achieved through the following technical solutions: A motorcycle exhaust structure, comprising a frame, an engine and an exhaust pipe, wherein the engine is fixedly mounted on the frame and is characterized in that the front end of the engine has an exhaust port, the bottom of the engine has a clearance groove arranged along the length direction of the frame, one end of the exhaust pipe is connected to the exhaust port, and the other end extends downward and passes through the clearance groove backward.

[0005] The utility model provides a clearance groove at the bottom of the engine, so that the exhaust pipe can pass through the clearance groove and extend to the rear side of the engine, thereby preventing the exhaust pipe from being exposed to the outside and contacting with the human body to cause burns, and also preventing the exhaust pipe from colliding with foreign objects.

[0006] In the exhaust structure of the above-mentioned motorcycle, the exhaust pipe includes a front section of the pipe body, a middle section of the pipe body, a silencer box and a rear section of the pipe body that are connected and communicated in sequence. The upper end of the front section of the pipe body has a connecting flange for connecting to the exhaust port, and the middle section of the pipe body is bent relative to the front section of the pipe body.

[0007] In the above-mentioned exhaust structure of the motorcycle, the muffler box is located at the rear side of the engine.

[0008] In the aforementioned motorcycle exhaust structure, the engine bottom is provided with a plurality of vertical mounting posts on either side, with the aforementioned clearance slot formed between the posts. The engine is mounted to the frame via the mounting posts, and the mounting posts raise the engine bottom, forming a clearance slot for the exhaust pipe to pass through.

[0009] In the above-mentioned exhaust structure of the motorcycle, a reinforcing rib is provided between the mounting post and the bottom surface of the engine. The provision of the reinforcing rib improves the connection strength between the mounting post and the engine, ensuring the stability of the engine after installation.

[0010] In the exhaust structure of the above-mentioned motorcycle, the frame includes two spaced and symmetrically arranged beams, a mounting base is fixed between the two beams, and the engine is fixed on the mounting base via the mounting columns.

[0011] In the aforementioned motorcycle exhaust structure, the muffler box is positioned between two vehicle beams. Mounting brackets are provided on one or both sides of the muffler box, and mounting ears are provided on one or both vehicle beams for bolted connection to the mounting brackets. The front end of the exhaust pipe is secured to the engine via a mounting flange, while the rear end is connected to the vehicle frame via the mounting brackets of the muffler box.

[0012] In the above-mentioned exhaust structure of the motorcycle, the rear section of the pipe body extends from between the two beams to below the beam and bends backward to extend.

[0013] Compared with the prior art, the utility model has the following advantages:

[0014] 1. The utility model sets a clearance groove at the bottom of the engine, so that the exhaust pipe passes through the clearance groove at the bottom of the engine and extends to the rear side of the engine, avoiding burns caused by contact with the exhaust pipe during use, and can better protect the exhaust pipe and avoid daily bumps on the exhaust pipe.

[0015] 2. The utility model is cleverly designed. A mounting column is provided at the bottom of the engine to lift the engine and form a clearance groove at the bottom, thereby avoiding changes to the interior of the engine due to the provision of the clearance groove and reducing the improvement cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of a motorcycle;

[0017] Figure 2 It is a structural diagram of the utility model;

[0018] Figure 3 It is a structural schematic diagram of the utility model from another perspective;

[0019] Figure 4 It is a schematic diagram of the structure of the connection between the engine and the exhaust pipe;

[0020] Figure 5 It is a schematic diagram of the exhaust pipe structure.

[0021] In the figure, 1. frame; 11. beam; 111. mounting ear; 12. bottom plate; 2. engine; 21. mounting column; 22. reinforcing rib; 2a. clearance groove; 3. exhaust pipe; 31. front section of pipe body; 32. middle section of pipe body; 33. muffler box; 34. rear section of pipe body; 35. connecting flange; 36. mounting bracket. DETAILED DESCRIPTION

[0022] An exhaust structure for a motorcycle, the motorcycle is a small displacement motorcycle, such as Figures 1 to 3 As shown, the vehicle comprises a frame 1, an engine 2 and an exhaust pipe 3. The engine 2 is fixed to the frame 1. An exhaust port is provided at the upper front end of the engine 2 and a clearance groove 2a is provided at the bottom of the engine 2 along the length direction of the frame 1. The exhaust pipe 3 is connected to the exhaust port of the engine 2 and passes through the clearance groove 2a from the front side of the engine 2 to the rear side of the engine 2, so that the exhaust pipe 3 is hidden inside the vehicle body to avoid contact with people and burns.

[0023] Specifically, such as Figures 2 to 5 As shown, the vehicle frame 1 includes two spaced-apart, symmetrically spaced beams 11. Each beam 11 is formed from bent steel pipes. The lower portions of the beams 11 are horizontally arranged, and a horizontally positioned base plate 12 is welded between the lower portions of the two beams 11. Two vertical mounting posts 21 are located on either side of the bottom of the engine 2. Each mounting post 21 is also provided with axially threaded holes, allowing the engine 2 to be bolted to the base plate 12 via the mounting posts 21. The aforementioned clearance slot 2a is formed between the mounting posts 21 to allow the exhaust pipe 3 to pass through. In practice, three mounting posts 21 may be provided on each side. The exhaust pipe 3 comprises a front section 31, a middle section 32, a muffler box 33, and a rear section 34, all integrally connected and welded together. The upper end of the front section 31 has a connecting flange 35, and the middle section 32 is bent relative to the front section 31 at an angle of approximately 90°. The front section 31 of the pipe body is connected to the exhaust port of the engine 2 via a connecting flange 35 and is located on the front side of the engine 2. The middle section 32 of the pipe body extends through the clearance groove 2a and beyond the clearance groove 2a, positioning the muffler box 33 on the rear side of the engine 2 and between the two beams 11. A mounting bracket 36 is provided on one side of the muffler box 33. A mounting ear 111 is provided on the beam 11 on the same side as the mounting bracket 36, adjacent to the mounting bracket 36. The mounting bracket 36 and the mounting ear 111 can be bolted together to secure the muffler box 33. Of course, mounting brackets 36 can also be provided on both sides of the muffler box 33, and corresponding mounting ears 111 can also be provided on both sides of the beam 11. One end of the rear section 34 of the pipe body is connected to the muffler box 33, and the other end extends from the gap between the two beams 11 to the bottom of the beam 11 and bends backward. The rear section 34 of the pipe body is positioned in front of the rear wheel of the motorcycle, placing the entire exhaust pipe 3 inaccessible to the user during daily use.

[0024] Further, such as Figure 4 As shown, reinforcing ribs 22 are provided between the mounting post 21 and the bottom surface of the engine 2 to improve the structural strength between the mounting post 21 and the engine 2 .

[0025] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0026] The specific embodiments described herein are merely illustrative of the spirit of the present invention. Persons skilled in the art may make various modifications, additions, or substitutions to the described specific embodiments without departing from the spirit of the present invention or exceeding the scope defined by the appended claims.

[0027] Although this document frequently uses terms such as vehicle frame 1, vehicle beam 11, engine 2, and exhaust pipe 3, the use of other terms is not excluded. These terms are used solely to more conveniently describe and explain the essence of the present invention; interpreting them as any additional limitations is contrary to the spirit of the present invention.

Claims

1. A motorcycle exhaust structure, comprising a frame (1), an engine (2) and an exhaust pipe (3), wherein the engine (2) is fixed on the frame (1), and is characterized in that: The front end of the engine (2) is provided with an exhaust port, the bottom of the engine (2) is provided with a clearance groove (2a) arranged along the length direction of the vehicle frame (1), one end of the exhaust pipe (3) is connected to the exhaust port, and the other end passes through the clearance groove (2a) from the front side of the engine (2) to the rear side of the engine (2).

2. The exhaust structure of a motorcycle according to claim 1, characterized in that: The exhaust pipe (3) comprises a pipe front section (31), a pipe middle section (32), a muffler box (33) and a pipe rear section (34) which are sequentially connected and communicated. The upper end of the pipe front section (31) is provided with a connecting flange (35) for connecting to the exhaust port. The pipe middle section (32) is bent relative to the pipe front section (31).

3. The exhaust structure of a motorcycle according to claim 2, characterized in that: The muffler box (33) is located at the rear side of the engine (2).

4. The exhaust structure of a motorcycle according to claim 2 or 3, characterized in that: A plurality of vertically arranged mounting columns (21) are respectively provided on both sides of the bottom of the engine (2), and the above-mentioned clearance groove (2a) is formed between the mounting columns (21) on both sides.

5. The exhaust structure of a motorcycle according to claim 4, characterized in that: A reinforcing rib (22) is provided between the mounting column (21) and the bottom surface of the engine (2).

6. The exhaust structure of a motorcycle according to claim 5, characterized in that: The vehicle frame (1) comprises two spaced and symmetrically arranged vehicle beams (11), a mounting base plate (12) is fixedly arranged between the two vehicle beams (11), and the engine (2) is fixedly arranged on the mounting base plate (12) via the mounting columns (21).

7. The exhaust structure of a motorcycle according to claim 6, characterized in that: The muffler box (33) is located between the two vehicle beams (11); a mounting bracket (36) is provided on one or both sides of the muffler box (33); and mounting ears (111) for being connected to the mounting bracket (36) by bolts are provided on one or both sides of the vehicle beams (11).

8. The exhaust structure of a motorcycle according to claim 7, characterized in that: The rear section (34) of the tube body extends from between the two vehicle beams (11) to below the vehicle beam (11) and bends and extends backward.

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