Connecting structure of exhaust pipe and silencer

Abstract

The utility model discloses a connecting structure of an exhaust pipe and a silencer, which comprises the exhaust pipe mounted on an engine cylinder head and the silencer mounted at the tail end of the exhaust pipe, pipelines of the exhaust pipe and the silencer are mounted in a sleeving manner, and the sleeving position is in interference fit connection through a soft rubber part. The soft rubber part is arranged at the joint of the tail end of the exhaust pipe and the silencer and is in interference fit connection with the silencer, so that integral soft connection is realized, the defects of air leakage, breakage, looseness of bolts for fixing the exhaust pipe and the like at the joint of the exhaust pipe and the silencer in traditional hard connection can be avoided, the use safety of motorcycle parts is improved, and the service life of the motorcycle parts is prolonged. And the running noise of the vehicle can be effectively reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of motorcycles, and more specifically relates to a connection structure of an exhaust pipe and a muffler. Background Art

[0002] In the motorcycle of the prior art, the engine is mounted on the frame through a flexible connection, and the front end of the exhaust pipe is mounted on the engine cylinder head, which is still a flexible connection; the rear end of the exhaust pipe is connected to the muffler, and the muffler is hard connected to the frame; during the operation of the motorcycle, relative movement will occur between the exhaust pipe and the muffler, which will cause some breakage and leakage faults. Utility Model Content

[0003] In view of the shortcomings of the prior art, the purpose of the utility model is to provide a connection structure for an exhaust pipe and a muffler, so as to avoid the defects of the traditional hard connection structure such as leakage, breakage, loosening of the exhaust pipe fixing bolts at the connection between the exhaust pipe and the muffler, and improve the safety and service life of motorcycle components.

[0004] The utility model provides the following technical solution: a connection structure of an exhaust pipe and a muffler, comprising an exhaust pipe installed on an engine cylinder head and a muffler installed at the tail end of the exhaust pipe, the exhaust pipe and the muffler are installed in a sleeve-connected manner, and the sleeve-connected position is connected by an interference fit through a soft rubber part.

[0005] As an improvement, the tail end of the exhaust pipe forms a first sleeve pipe section with a reduced size, the head end of the muffler pipe forms a second sleeve pipe section with an enlarged size, and the soft rubber part is sleeved on the outside of the first sleeve pipe section and the inside of the second sleeve pipe section by interference fit.

[0006] As an improvement, the soft rubber piece is sleeved on the middle section of the first sleeve pipe section.

[0007] As an improvement, an annular rib is provided on the outer side of the soft rubber member.

[0008] As an improvement, 2-4 ribs are arranged at intervals along the axial direction of the soft rubber member.

[0009] As an improvement, the outer end of the soft rubber piece is provided with a chamfer with a gradually reduced size for easy sleeve connection.

[0010] As an improvement, chamfers are provided at both ends of the outer side of the soft rubber member.

[0011] As an improvement, the soft rubber part is a fluororubber compound.

[0012] The beneficial effects of the utility model are as follows: a soft rubber part is arranged at the connection between the tail end of the exhaust pipe and the muffler, which is connected with the muffler by interference fit to realize an overall soft connection, which can avoid defects such as air leakage, breakage, and loosening of bolts fixing the exhaust pipe at the connection between the traditional hard connection of the exhaust pipe and the muffler, improve the safety and service life of motorcycle components, and effectively reduce the noise of vehicle driving. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of a partial three-dimensional structure of a motorcycle of the present invention.

[0014] Figure 2 It is a schematic diagram of a partial cross-sectional structure of a motorcycle of the present invention.

[0015] Figure 3 for Figure 2 Enlarged view of point A in the middle.

[0016] Figure 4 It is a partial exploded view of the utility model. DETAILED DESCRIPTION

[0017] The specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0018] like Figure 1 , 2 , 3, and 4 are specific embodiments of the connection structure of the exhaust pipe and the muffler of the utility model. The embodiment includes an exhaust pipe 1 installed on the engine cylinder head and a muffler 2 installed at the tail end of the exhaust pipe 1. The exhaust pipe 1 and the muffler 2 are installed in a sleeve connection, and the sleeve connection position is connected by an interference fit through a soft rubber part 3.

[0019] When the utility model is in use, a soft rubber part 3 is added to the pipe sleeve joint position of the exhaust pipe 1 and the muffler 2, and the two sections of the pipe are softly connected by means of interference fit through the soft rubber part 3, so that vibration wear at the connection between the exhaust pipe and the muffler can be avoided when the motorcycle is running, and defects such as air leakage, breakage, and loosening of bolts fixing the exhaust pipe at the connection can be effectively avoided, thereby improving the safety and service life of motorcycle components, and the stable soft connection of the muffler can effectively reduce the noise of the vehicle when it is running.

[0020] As an improved specific implementation method, the tail end of the exhaust pipe 1 forms a first sleeve pipe section 11 with a reduced size, the head end of the pipe of the muffler 2 forms a second sleeve pipe section 21 with an enlarged size, and the soft rubber part 3 is interference fitly sleeved on the outer side of the first sleeve pipe section 11 and the inner side of the second sleeve pipe section 21.

[0021] like Figure 1 , 2As shown in Figures 3 and 4, the engine and exhaust pipe 1 are larger components, which are first assembled on the vehicle frame, and the tail end of the exhaust pipe 1 is set as a first sleeve pipe section 11 with a reduced size, so that the soft rubber part 3 can be pre-set and positioned. Then, when the muffler 2 is installed at the position of the frame, the second sleeve pipe section 21 with an enlarged size at the head end of the pipe of the muffler 2 is sleeved into place corresponding to the first sleeve pipe section 11 and the soft rubber part 3, making manual operation more convenient and quick, and improving installation efficiency and installation quality.

[0022] As an improved specific implementation manner, the soft rubber member 3 is sleeved on the middle section of the first sleeve tube section 11 .

[0023] like Figure 3 , 4 As shown, the soft rubber component 3 is sleeved on the middle section of the first sleeve tube section 11, and a section of unsleeved part is left in front and behind the first sleeve tube section 11. On the one hand, it is to ensure that the inner side of the soft rubber component 3 is fully in contact with the first sleeve tube section 11 as a whole, to improve the friction between the structures and to ensure the sleeve stability; on the other hand, when the second sleeve tube section 21 is installed or disassembled with the outer side of the soft rubber component 3 by interference sleeve, the soft rubber component 3 has a margin for sliding forward or backward, thereby ensuring that the soft rubber component 3 is in a flat state relative to the first sleeve tube section 11 and the second sleeve tube section 21 inside and outside after the sleeve installation is completed, so as to ensure its sealing function and avoid the possibility of easy damage and destruction of the sealing performance caused by unevenness after installation.

[0024] As an improved specific implementation manner, an annular rib 31 is provided on the outer side of the soft rubber member 3 .

[0025] like Figure 3 , 4 As shown, the position of the rib 31 has a tighter contact sealing state with the second sleeve pipe section 21 after the interference sleeve is set, thereby further improving the connection stability between the structures and avoiding the possibility of leakage and loosening. Preferably, 2-4 ribs 31 are arranged at intervals along the axial direction of the soft rubber part 3. As shown in the figure, three ribs 31 are set, thereby achieving multi-level structural interference, thereby strengthening the connection stability and improving the sealing performance.

[0026] As an improved specific implementation, the outer end of the soft rubber member 3 is provided with a chamfer 32 with a gradually reduced size for easy sleeve connection.

[0027] like Figure 3 , 4As shown, the chamfer 32 is provided to facilitate smoother installation of the second sleeve pipe section 21 and the soft rubber member 3, avoid curling of the soft rubber member 3, improve installation efficiency, and avoid the possibility of damage to the soft rubber member 3. Preferably, the chamfer 32 is provided at both ends of the outer side of the soft rubber member 3. Therefore, when the soft rubber member 3 and the first sleeve pipe section 11 are sleeved and installed, there is no need to consider the front and rear ends of the soft rubber member 3, which is convenient for manual operation.

[0028] As an improved specific implementation manner, the soft rubber component 3 is a fluororubber compound.

[0029] In specific implementation, relying on the material properties of fluororubber compound, it has excellent heat resistance, oxidation resistance, oil resistance and corrosion resistance, which is more conducive to use in the exhaust pipe position of motorcycle engine and can ensure its service life.

[0030] The above are only preferred implementations of the utility model. The protection scope of the utility model is not limited to the above embodiments. All technical solutions under the idea of ​​the utility model belong to the protection scope of the utility model. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the utility model should also be regarded as the protection scope of the utility model.

Claims

1. A connection structure of an exhaust pipe and a muffler, comprising an exhaust pipe (1) mounted on an engine cylinder head and a muffler (2) mounted at the rear end of the exhaust pipe (1), characterized in that: The exhaust pipe (1) and the muffler (2) are installed by sleeve connection, and the sleeve connection position is connected by interference fit through a soft rubber part (3).

2. The connection structure of an exhaust pipe and a muffler according to claim 1, characterized in that: The tail end of the exhaust pipe (1) forms a first sleeve pipe section (11) with a reduced size, the head end of the pipe of the muffler (2) forms a second sleeve pipe section (21) with an enlarged size, and the soft rubber part (3) is sleeved on the outside of the first sleeve pipe section (11) and the inside of the second sleeve pipe section (21) by interference fit.

3. The connection structure of an exhaust pipe and a muffler according to claim 2, characterized in that: The soft rubber part (3) is sleeved on the middle section of the first sleeve tube section (11).

4. The connection structure of an exhaust pipe and a muffler according to claim 1, 2 or 3, characterized in that: An annular protruding rib (31) is provided on the outer side of the soft rubber part (3).

5. The connection structure of an exhaust pipe and a muffler according to claim 4, characterized in that: The protruding ribs (31) are arranged at intervals of 2 to 4 along the axial direction of the soft rubber part (3).

6. The connection structure of an exhaust pipe and a muffler according to claim 1, 2 or 3, characterized in that: The outer end of the soft rubber part (3) is provided with a chamfer (32) with a gradually decreasing size for easy sleeve connection.

7. The connection structure of an exhaust pipe and a muffler according to claim 6, characterized in that: The chamfers (32) are arranged at both ends of the outer side of the soft rubber part (3).

8. The connection structure of an exhaust pipe and a muffler according to claim 1, 2 or 3, characterized in that: The soft rubber part (3) is a fluororubber compound.

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