Variable sound device connected to exhaust pipe of retro locomotive

Abstract

The utility model discloses a variable sound device connected to an exhaust pipe of a retro locomotive, which comprises a connecting sleeve, a pipe seal head and a fixed collision cylinder, a main exhaust hole is arranged on the pipe wall of the rear end of the connecting sleeve, sound amplifying grooves are uniformly arranged on the connecting sleeve along the circumference of the connecting sleeve, an adjusting groove is further arranged on the connecting sleeve, and the main exhaust hole is communicated with the adjusting groove. The adjusting groove is provided with an adjusting connecting piece, the adjusting connecting piece extends into the connecting sleeve and is connected with the rotating cylinder, and the rotating cylinder is provided with a sound outlet groove along the circumference of the rotating cylinder. The variable sound device can be sleeved on exhaust pipes of retro locomotives of different specifications, is wide in application range and free of structural change installation, and enables the sound outlet grooves and the sound amplification grooves to be opposite or staggered one by one by adjusting the movement of the connecting piece in the adjusting groove and changing the position of the movable collision cylinder in the connecting sleeve. After gas flowing back from the fixed collision cylinder collides with gas entering the connecting sleeve in the opposite direction, the gas is exhausted from the sound amplifying groove or the main exhaust hole, and then sound and volume changes are achieved.

Description

Technical Field

[0001] The utility model relates to a component of a retro motorcycle, in particular to a variable sound device connected to an exhaust pipe of the retro motorcycle. Background Art

[0002] As a flexible and fast means of transportation, motorcycles are light, flexible, and fast. They are widely used in patrol, passenger and freight transportation, and can also be used as sports equipment. Retro motorcycles are more popular with consumers, especially young people, due to their cool appearance and performance. Although retro motorcycles have been continuously improved and their performance has been continuously improved, the sound they make has always been determined by the sound emitted from the exhaust pipe after the engine is started. The sound is fixed and cannot meet the needs of many enthusiasts. Utility Model Content

[0003] In view of the shortcomings of the existing technology, the utility model provides a variable sound device connected to the exhaust pipe of a retro motorcycle.

[0004] This variable sound device can be installed on retro motorcycle exhaust pipes of different specifications. It has a wide range of uses and can be installed without structural changes. By adjusting the movement of the connecting piece in the adjustment groove, the position of the movable impingement tube in the connecting sleeve is changed, so that the sound outlet groove and the sound amplification groove are opposite or staggered, so that the gas returning from the fixed impingement tube collides with the gas entering the connecting sleeve, and then is discharged from the sound amplification groove or the main exhaust hole, thereby realizing the change of sound and its volume.

[0005] In order to achieve the above-mentioned purpose, the technical solution adopted by the present invention is:

[0006] The variable sound device connected to the exhaust pipe of a vintage motorcycle comprises a connecting sleeve with a hollow cylindrical shape whose front end is sleeved on the exhaust pipe, and a sleeve groove is provided on the wall of the connecting sleeve along its axial direction from the front end thereof, and ear-shaped connecting blocks are provided on the connecting sleeve and on both ends of the sleeve groove, and connecting holes are provided on the two connecting blocks, and fixed connecting pieces are passed through the two connecting holes. The rear end of the connecting sleeve is provided with a truncated cone-shaped pipe head, and the end of the pipe head is provided with a fixed bumper extending to the connecting sleeve, and the fixed bumper is a hollow cylinder with an opening at one end, and an air flow hole is provided at the center of the end of the fixed bumper, and the diameter of the air flow hole is one third of the diameter of the air hole of the exhaust pipe of the vintage motorcycle. The fixed bumper is connected to the vintage motorcycle. The horizontal distance between the exhaust pipes is 50 to 70 cm, the length of the fixed collision tube is set to 50 to 60 cm, and a main exhaust hole is provided on the rear end of the connecting sleeve. The diameter of the main exhaust hole is 2 to 3 times the diameter of the air flow hole. The connecting sleeve is provided with sound amplification grooves evenly along its circumference at the central longitudinal axis. The connecting sleeve is also provided with an adjustment groove adjacent to the sound amplification groove. The adjustment groove is provided with an adjustment connector that can move linearly therein. The adjustment connector extends into the connecting sleeve and is connected to the movable cylinder. The movable cylinder is a hollow cylinder with openings at both ends and is arranged close to the inner wall of the connecting sleeve. The movable cylinder can rotate around the connecting sleeve, and the movable cylinder is provided with a sound outlet groove corresponding to the sound amplification groove on the connecting sleeve along its circumference.

[0007] As an optimal technical solution, in order to enable the movable cylinder to move synchronously with the adjustment connecting piece when it is adjusted and moved, thereby achieving convenient and flexible adjustment, slots extending to the ends of the movable cylinder are provided on both ends of the movable cylinder.

[0008] As an optimal technical solution, in order to avoid friction and wear when the connecting sleeve is installed on the exhaust pipe of a vintage motorcycle and to achieve lossless installation, a protective gasket is provided at the connection between the connecting sleeve and the vintage motorcycle, and the protective gasket is fixed on the inner wall of the connecting sleeve.

[0009] Compared with the prior art, the present invention has the following beneficial effects:

[0010] 1. This variable sound device can be installed on the exhaust pipes of retro motorcycles of different specifications. It has a wide range of uses and can be installed without structural changes. By adjusting the movement of the connecting piece in the adjustment groove, the position of the movable impingement tube in the connecting sleeve is changed, so that the sound outlet groove and the sound amplification groove are opposite or staggered. The gas returning from the fixed impingement tube collides with the gas entering the connecting sleeve, and then is discharged from the sound amplification groove or the main exhaust hole, thereby realizing the change of sound and volume.

[0011] 2. Both ends of the movable cylinder are provided with slots extending to the ends thereof, so that when the adjusting connecting piece is adjusted and moved, the movable cylinder moves synchronously, achieving convenient and flexible adjustment.

[0012] 3. A protective gasket is provided at the connection between the connecting sleeve and the retro motorcycle. The protective gasket is fixed on the inner wall of the connecting sleeve to prevent friction and wear when the connecting sleeve is installed on the exhaust pipe of the retro motorcycle, thereby achieving lossless installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments.

[0014] Figure 1 It is a structural diagram of the utility model;

[0015] Figure 2 Schematic diagram of the structure of the connecting sleeve;

[0016] Figure 3 It is a structural diagram of a fixed collision cylinder;

[0017] Figure 4 It is a structural diagram of the rotating drum;

[0018] Figure numbers: 1. Connecting sleeve, 1-1. Sleeve groove, 1-2. Connecting block, 1-3. Air flow hole, 1-4. Main exhaust hole, 1-5. Sound amplification groove, 1-6. Adjustment groove, 2. Pipe head, 3. Fixed bumper, 3-1. Air flow hole, 4. Rotating cylinder, 4-1. Sound outlet groove, 4-2. Slot. DETAILED DESCRIPTION

[0019] like Figure 1The figure shows a specific embodiment of the utility model, which is a variable sound device connected to the exhaust pipe of a retro motorcycle, including a connecting sleeve 1 with a hollow cylindrical shape whose front end is sleeved on the exhaust pipe. In order to enable the connecting sleeve 1 to be sleeved on exhaust pipes of different specifications, the pipe wall of the connecting sleeve 1 is provided with a sleeve groove 1-1 along its axial direction from its front end, and the connecting sleeve 1 is provided with ear-shaped connecting blocks 1-2 on both ends of the sleeve groove 1-1. The two connecting blocks 1-2 are provided with connecting holes 1-3, and the two connecting holes 1-3 are crossed by fixed connecting pieces. In order to ensure convenient disassembly and installation, the connecting holes 1-3 are set as threaded holes in this embodiment, and the fixed connecting piece is a single-head stud. The rear end of the connecting sleeve 1 is provided with a The conical tube head 2 is in a truncated cone shape. In order to ensure that the connection between the connecting sleeve 1 and the tube head 2 is firm, the connecting sleeve 1 and the tube head 2 are integrally manufactured in this embodiment. A fixed bumper 3 extending toward the connecting sleeve 1 is provided in the end of the tube head 2. The fixed bumper 3 is a hollow cylinder with an opening at one end. An air flow hole 3-1 is provided at the center of the end of the fixed bumper 3. The diameter of the air flow hole 3-1 is one-third of the diameter of the air hole of the exhaust pipe of a retro locomotive. The horizontal distance between the fixed bumper 3 and the exhaust pipe of a retro locomotive is 50 to 70 cm. The length of the fixed bumper 3 is set to 50 to 60 cm. In order to ensure the sound changing effect, the diameter and length of the fixed bumper 3 are set according to the displacement of the retro locomotive. This device is only suitable for retro motorcycles with a displacement of less than or equal to 500cc. The diameter of the fixed collision cylinder 3 in this embodiment is 50cm. A main exhaust hole 1-4 is provided on the rear end of the connecting sleeve 1. The diameter of the main exhaust hole 1-4 is 2 to 3 times the diameter of the air flow hole 3-1. The connecting sleeve 1 is evenly provided with amplification grooves 1-5 along its circumference at the central longitudinal axis. The connecting sleeve 1 is also provided with an adjustment groove 1-6 adjacent to the amplification groove 1-5. The adjustment groove 1-6 is provided with an adjustment connector that can move linearly therein. The adjustment connector extends into the connecting sleeve 1 and is connected to the movable cylinder 4. The movable cylinder 4 is a hollow cylinder with openings at both ends and is close to the inner wall of the connecting sleeve 1. The movable cylinder 4 is configured to rotate around the connecting sleeve 1, and the movable cylinder 4 is provided with a sound outlet groove 4-1 corresponding to the sound amplifying groove on the connecting sleeve 1 along its circumference, and the shape of the sound outlet groove 4-1 is the same as the shape of the sound amplifying groove 1-5. In order to ensure that the sound outlet groove and the sound amplifying groove are staggered one by one, the movable cylinder 4 can completely close the sound amplifying groove 1-5 on the connecting sleeve 1, and the size of the sound outlet groove 4-1 is smaller than the size of the sound amplifying groove 1-5. The sound outlet groove 4-1 is moved in the adjusting groove 1-6 by adjusting the connecting piece to make the sound outlet groove 4-1 and the sound amplifying groove one by one or staggered, and the relative width can also be reasonably adjusted according to actual needs, thereby realizing the change of sound. In order to facilitate adjustment and tightening, the adjusting connecting piece in this embodiment is configured to be a single-head stud.

[0020] Both ends of the rotating cylinder 4 are provided with slots 4 - 2 extending to the ends thereof, so that when the adjusting connecting piece is adjusted and moved, the rotating cylinder can be ensured to move synchronously, thereby achieving convenient and flexible adjustment.

[0021] A protective gasket is provided at the connection between the connecting sleeve 1 and the retro motorcycle. The protective gasket is fixed on the inner wall of the connecting sleeve 1. Under the premise of ensuring the protection effect, in order to control costs and facilitate installation, the protective gasket in this embodiment is set to be an asbestos layer. The protective gasket can prevent the connecting sleeve from causing friction and wear when being installed on the exhaust pipe of the retro motorcycle, thereby achieving lossless installation.

[0022] When the utility model is used: the sound changing device is installed on the end of the exhaust pipe of a retro motorcycle, and a single-head bolt is adopted to penetrate the two connecting holes 1-3 for fixing. The connecting sleeve 1 is provided with a protective gasket to achieve lossless installation, and the connecting sleeve 1 is provided with a sleeve groove 1-1 so that it can be sleeved on exhaust pipes of different specifications. The adjusting connector moves in the adjusting groove 1-6 so that the sound outlet groove 4-1 and the sound amplification groove 1-5 are opposite to each other or staggered, and the relative width of the sound outlet groove 4-1 and the sound amplification groove 1-5 can also be reasonably adjusted according to actual needs.

[0023] When sound outlet slots 4-1 and amplifying slots 1-5 are aligned, airflow holes 3-1 are designed to face the exhaust holes of the vintage motorcycle exhaust pipe. Almost all of the exhaust gas from the vintage motorcycle exhaust pipe enters fixed impingement tube 3. However, since airflow holes 3-1 are smaller than the exhaust holes, most of the gas flows back through fixed impingement tube 3, colliding with the exhaust gas from the exhaust pipe. It then exits through sound outlet slots 4-1 and amplifying slots 1-5, creating a different sound from a "booming" sound to a "clacking" sound, and the volume is also increased, creating a more appealing sound. The width of the sound outlet slots 4-1 relative to the amplifying slots 1-5 can also be adjusted based on user preference or other factors.

[0024] When the sound outlet slot 4-1 and the sound amplification slot 1-5 are staggered one by one, since the air flow hole 3-1 is designed relative to the exhaust hole of the retro motorcycle exhaust pipe, the gas discharged from the retro motorcycle exhaust pipe almost all enters the fixed impingement tube 3. Since the air flow hole 3-1 is smaller than the exhaust hole, most of the gas flows back along the fixed impingement tube 3 and is discharged from the main exhaust hole 1-4, which amplifies the sound of the motorcycle to a certain extent.

[0025] Of course, the above is only a detailed description of the preferred specific implementation methods of the present invention in conjunction with the accompanying drawings, and is not intended to limit the scope of implementation of the present invention. All equivalent changes made based on the principles, constructions and structures of the present invention should be included in the scope of protection of the present invention.

Claims

1. A variable sound device connected to the exhaust pipe of a vintage motorcycle, characterized by: The invention comprises a hollow cylindrical connecting sleeve (1) with a front end sleeved on the exhaust pipe, a sleeve groove (1-1) being provided on the pipe wall of the connecting sleeve (1) along its axial direction from the front end thereof, connecting blocks (1-2) in the shape of hanging ears being provided on the connecting sleeve (1) and at both ends of the sleeve groove (1-1), connecting holes (1-3) being provided on the two connecting blocks (1-2), and fixed connecting pieces being passed through the two connecting holes (1-3), and the rear end of the connecting sleeve (1) being provided with a sleeve groove (1-1). The pipe seal (2) is provided with a truncated cone-shaped pipe seal (2), and a fixed bumper (3) extending toward the connecting sleeve (1) is provided at the end of the pipe seal (2). The fixed bumper (3) is a hollow cylinder with an opening at one end. An air flow hole (3-1) is provided at the center of the end of the fixed bumper (3). The diameter of the air flow hole (3-1) is one-third of the diameter of the air hole of the exhaust pipe of a retro motorcycle. The horizontal distance between the fixed bumper (3) and the exhaust pipe of the retro motorcycle is 50~70cm, the length of the fixed collision tube (3) is set to 50~60cm, a main exhaust hole (1-4) is provided on the rear end of the connecting sleeve (1), the diameter of the main exhaust hole (1-4) is 2~3 times the diameter of the air flow hole, and the central longitudinal axis of the connecting sleeve (1) is uniformly provided with amplification grooves (1-5) along its circumference, and the connecting sleeve (1) is also provided with an adjustment groove (1-6) adjacent to the amplification groove (1-5), and the adjustment groove (1-6) is provided on the connecting sleeve (1). An adjusting connector capable of linear movement is provided on the joint groove (1-6), the adjusting connector extending into the connecting sleeve (1) and connected to the movable cylinder (4), the movable cylinder (4) being in the shape of a hollow cylinder with both ends open and arranged close to the inner wall of the connecting sleeve (1), the movable cylinder (4) being rotatable around the connecting sleeve (1), and the movable cylinder (4) being provided with a sound outlet groove (4-1) corresponding to the sound amplification groove (1-5) on the connecting sleeve (1) along its circumference.

2. The variable sound device connected to the exhaust pipe of a vintage motorcycle according to claim 1, characterized in that: Both ends of the movable cylinder (4) are provided with slots (4-2) extending to the ends thereof.

3. The variable sound device connected to the exhaust pipe of a vintage motorcycle according to claim 1 or 2, characterized in that: A connecting protective gasket is provided at the connection point between the connecting sleeve (1) and the exhaust pipe of the retro motorcycle, and the protective gasket is fixed on the inner wall of the connecting sleeve (1).

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