Motorcycle exhaust pipe structure

Abstract

This utility model discloses a motorcycle exhaust adapter structure, comprising: a hollow adapter body, with both ends connected to the engine cylinder head exhaust passage and the exhaust pipe, respectively. The axis of the adapter body is offset away from the front strut of the frame, and a groove structure adapted to the outer contour of the adapter body is provided on the side of the front strut of the frame near the adapter body. This embodiment, by setting the adapter body between the engine cylinder head exhaust passage and the exhaust pipe, effectively solves the spatial interference problem between the front strut of the frame and the exhaust pipe in motorcycles where the engine cylinder head exhaust passage is located in the middle of the vehicle and the frame uses a middle strut structure. This improves the assembly efficiency of the exhaust system, exhaust flow, and overall vehicle safety.

Description

Technical Field

[0001] This utility model relates to the field of motorcycle exhaust system technology, specifically to a motorcycle exhaust adapter structure. Background Technology

[0002] In the structural design of motorcycles, the engine cylinder head exhaust port is typically located in the middle of the vehicle, while the front strut of the frame uses a central strut structure to support the body and related components. In existing technology, the exhaust pipe is usually bolted directly to the engine cylinder head exhaust port, and its bends need to be designed according to the overall vehicle layout. However, due to the proximity of the frame strut and the engine cylinder head exhaust port, the bending angle and path of existing exhaust pipes are difficult to effectively avoid the frame strut due to process limitations on the minimum bending radius, easily leading to structural interference (such as direct contact between the exhaust pipe and the frame strut or excessively small gaps). This interference not only affects the assembly efficiency of the exhaust system but may also cause friction damage due to vibrations during vehicle operation, even affecting exhaust flow and overall vehicle safety. Summary of the Invention

[0003] In view of the aforementioned defect that the curved part of the existing motorcycle exhaust pipe is prone to structural interference with the front strut of the frame, the purpose of this utility model is to propose a motorcycle exhaust adapter pipe structure.

[0004] To achieve the aforementioned objective, the technical solution adopted by this utility model is: a motorcycle exhaust adapter structure, comprising a hollow adapter body, the two ends of which are detachably connected to the engine cylinder head exhaust passage and the exhaust pipe, respectively, the axis of the adapter body is offset away from the front strut of the frame, and a groove structure adapted to the outer contour of the adapter body is provided on the side of the front strut of the frame near the adapter body.

[0005] The technical solution of this utility model has the following beneficial effects:

[0006] (1) A transfer pipe body is installed between the engine cylinder head exhaust passage and the exhaust pipe, which can effectively solve the problem of spatial interference between the front frame riser and the exhaust pipe of the motorcycle with the engine cylinder head exhaust passage located in the middle of the vehicle and the frame front riser with the intermediate riser structure, thereby improving the assembly efficiency of the exhaust system, the smoothness of exhaust and the safety of the whole vehicle.

[0007] (2) The axis of the adapter pipe body is offset away from the front riser tube of the frame. In conjunction with the groove structure of the front riser tube of the frame, interference is further avoided, achieving double avoidance and solving the problem that the existing exhaust pipe cannot avoid due to bending restrictions.

[0008] (3) With this structure, there is no need to make large-scale modifications to the engine cylinder head or chassis. It is highly adaptable and easy to mass-produce and promote.

[0009] In one embodiment, at least one of a first reinforcing rib extending axially and a second annular reinforcing rib is provided on the outer wall of the transfer pipe body.

[0010] Advantages: This design can further increase the strength of the adapter pipe, making the adapter pipe body less prone to deformation.

[0011] In one embodiment, the two ends of the transfer pipe body are respectively provided with a first flange and a second flange perpendicular to the axis of the transfer pipe body. The first flange and the outlet flange face of the engine cylinder head exhaust passage are connected by bolts, and the second flange and the inlet flange face of the exhaust pipe are connected by bolts and nuts.

[0012] Advantages: The adapter pipe body is detachably connected to the engine cylinder head and exhaust pipe using flanges and bolts, which is convenient to assemble and has good sealing performance.

[0013] In one embodiment, the first flange, the second flange, and the adapter pipe body are integrally formed.

[0014] In one embodiment, sealing gaskets are provided between the first flange and the outlet flange face of the engine cylinder head exhaust passage, and between the second flange and the inlet flange face of the exhaust pipe.

[0015] Advantages: This design can further improve the sealing performance of the structure.

[0016] In one embodiment, the adapter pipe body is made of aluminum alloy.

[0017] Advantages: The adapter pipe body is made of aluminum alloy, which is lightweight and has sufficient structural strength, reducing the overall vehicle load while ensuring connection stability.

[0018] The above description is merely an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this utility model more obvious and understandable, preferred embodiments are given below, and detailed descriptions are provided in conjunction with the accompanying drawings. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of a motorcycle exhaust pipe structure according to this utility model.

[0020] Figure 2 This is a schematic diagram showing the assembly relationship between the transfer pipe body, the engine cylinder head exhaust passage, the exhaust pipe, and the front riser of the chassis.

[0021] In the diagram, 1-transfer pipe body, 2-first flange, 3-second flange, 4-bolt hole, 5-engine cylinder head exhaust passage, 6-exhaust pipe, 7-frame front riser tube, 8-groove structure, 9-bolt, 10-sealing gasket. Detailed Implementation

[0022] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0023] Please see Figure 1 and Figure 2 This embodiment discloses a motorcycle exhaust adapter structure, including a hollow adapter body 1. In this embodiment, the adapter body is integrally formed by machining aluminum alloy material, which has lightweight and sufficient structural strength. The two ends of the adapter body 1 are detachably connected to the engine cylinder head exhaust passage 5 and the exhaust pipe 6, respectively. The axis of the adapter body 1 is offset away from the front strut tube 7 of the frame. A groove structure 8 is provided on the side of the front strut tube 7 of the frame close to the adapter body. The position and shape of the groove structure are adapted to the outer wall contour of the adapter body. When the adapter body is installed in place, the groove structure provides additional clearance space for the adapter body, avoiding spatial interference between the adapter body and the front strut tube of the frame.

[0024] In this embodiment, the two ends of the adapter pipe body 1 are respectively provided with a first flange 2 and a second flange 3. Both flanges are perpendicular to the axis of the adapter pipe body 1. The first flange 2 is detachably connected to the engine cylinder head exhaust passage 5 by bolts 9, and the second flange 3 is detachably connected to the exhaust pipe 6 by bolts and nuts. Specifically: the first flange 2 is adapted to the outlet flange surface of the engine cylinder head exhaust passage 5, and a number of bolt holes 4 (e.g., two bolt holes symmetrically distributed, of course, this utility model does not limit the number of bolt holes) are provided through it, and the positions of the two bolt holes correspond one-to-one with the bolt mounting holes on the flange surface of the engine cylinder head exhaust passage 5. During assembly, the first flange 2 is fastened to the engine cylinder head exhaust passage 5 by bolts; the second flange 3 is adapted to the inlet flange surface of the exhaust pipe 6, and bolt holes 4 (e.g., two bolt holes symmetrically distributed, of course, this utility model does not limit the number of bolt holes) are also provided through it, and the positions of the two bolt holes correspond one-to-one with the bolt mounting holes on the flange surface of the exhaust pipe 6. The second flange 3 is fastened to the exhaust pipe 6 by bolts and nuts. Furthermore, the first flange, the second flange, and the adapter pipe body are integrally formed, which makes assembly more convenient; sealing gaskets 10 are provided between the first flange and the outlet flange face of the engine cylinder head exhaust passage, and between the second flange and the inlet flange face of the exhaust pipe. This design can further improve the airtightness and prevent gas leakage.

[0025] In this embodiment, the axis of the adapter pipe body is offset away from the front riser tube of the frame when extending from the first flange to the second flange. Specifically, the axis direction is designed according to the position of the front riser tube 7 of the frame. When extending from the first flange 2 (connecting the engine cylinder head) to the second flange 3 (connecting the exhaust pipe), the entire axis is offset away from the front riser tube 7 of the frame, forming a bend or tilt at a preset angle. This, combined with the groove structure on the front riser tube of the frame, achieves double avoidance and ensures that a safe clearance is maintained between the adapter pipe body and the front riser tube of the frame in the assembled state.

[0026] In this embodiment, at least one of several first reinforcing ribs extending axially and several annular second reinforcing ribs is provided on the outer wall of the adapter body. Specifically, integrally forming the aforementioned reinforcing rib structure on the outer wall of the adapter body can further increase the strength of the adapter, making the adapter less prone to deformation.

[0027] In other embodiments of this utility model, other types of detachable connection methods can be used to replace the flange to connect the adapter body to the engine cylinder head exhaust passage and exhaust pipe. For example, rotatable nuts are respectively fitted at both ends of the adapter body, and the adapter body is fastened to the engine cylinder head exhaust passage and exhaust pipe by means of the cooperation of the nuts and the matching threads.

[0028] In other embodiments of this utility model, when a higher strength material is used to make the adapter body, the reinforcing rib structure on the outer wall of the adapter body can be omitted.

[0029] The above description is merely a preferred embodiment of this utility model. Any simple modifications, equivalent changes, and alterations made by those skilled in the art to the above embodiments based on the technical essence of this utility model without departing from the scope of the technical solution of this utility model shall still fall within the scope of the technical solution of this utility model.

Claims

1. A motorcycle exhaust adapter structure, characterized in that, include: The hollow adapter body (1) is detachably connected to the engine cylinder head exhaust port (5) and exhaust pipe (6) at both ends. The axis of the adapter body (1) is offset away from the front riser tube (7) of the frame. A groove structure (8) that matches the outer contour of the adapter body (1) is provided on the side of the front riser tube (7) of the frame close to the adapter body.

2. The motorcycle exhaust pipe structure according to claim 1, characterized in that, The outer wall of the transfer pipe body is provided with at least one of a first reinforcing rib extending along the axial direction and a second reinforcing rib in the shape of an annulus.

3. The motorcycle exhaust pipe structure according to claim 1, characterized in that, The two ends of the transfer pipe body (1) are respectively provided with a first flange (2) and a second flange (3) perpendicular to the axis of the transfer pipe body. The first flange and the outlet flange of the engine cylinder head exhaust passage are connected by bolts, and the second flange and the inlet flange of the exhaust pipe are connected by bolts and nuts.

4. The motorcycle exhaust pipe structure according to claim 3, characterized in that, The first flange, the second flange, and the transfer pipe body are integrally formed.

5. The motorcycle exhaust pipe structure according to claim 3, characterized in that, Sealing gaskets (10) are installed between the first flange and the outlet flange face of the engine cylinder head exhaust passage, and between the second flange and the inlet flange face of the exhaust pipe.

6. A motorcycle exhaust adapter structure according to any one of claims 1-5, characterized in that, The adapter tube body is made of aluminum alloy.

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