Motorcycle crankshaft bearing noise reduction mechanism
By fixing the damper on the motorcycle frame and combining it with a multi-layer sound insulation structure, the problem of the damper in the traditional motorcycle crankshaft bearing noise reduction mechanism affecting the suspension system is solved, achieving better noise reduction effect and vehicle stability.
Patent Information
- Application Number
- CN202422628746.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-30
- Publication Date
- 2025-09-30
- Estimated Expiration
- 2034-10-30
AI Technical Summary
In the traditional motorcycle crankshaft bearing noise reduction mechanism, the dampers are installed on both sides of the wheels, which increases the wheel load, affects the suspension system and handling performance, and is not ideal in harsh environments.
A motorcycle crankshaft bearing noise reduction mechanism was designed, which included components such as a damper housing, a connector, a spring, a retaining ring, sound insulation cotton and a sound insulation board. By fixing the damper on the frame and combining it with a multi-layer sound insulation structure, suspension noise reduction and sound insulation effects were achieved.
The noise reduction performance of the motorcycle crankshaft bearing is improved, the noise transmission is reduced, the comfort and stability of the vehicle are enhanced, and the failure of the damper in harsh environments is avoided.
Smart Images
Figure CN223401375U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of crankshaft bearing noise reduction, in particular to a motorcycle crankshaft bearing noise reduction mechanism. Background Art
[0002] The motorcycle crankshaft is a crucial engine component, a shaft-like part made of metal. Located inside the engine, it plays the crucial role of converting the reciprocating motion of the pistons into rotational motion, thereby transmitting power to the motorcycle. A motorcycle crankshaft typically consists of a mainshaft and a crank. The mainshaft, serving as the crankshaft's primary support, is cylindrical and runs longitudinally along the engine. The crank is connected to the mainshaft via a crankpin, forming the rotating portion of the crankshaft. Each crank is connected to a piston. As the piston moves up and down, the crank transmits force through the connecting rod, rotating the mainshaft and thus achieving energy conversion. The design and manufacture of a motorcycle crankshaft require consideration of multiple factors, including the engine's displacement, speed, and power requirements, as well as the crankshaft's strength, balance, and durability requirements. The design and manufacturing precision of the crankshaft directly impact the engine's performance and lifespan.
[0003] Traditional motorcycle crankshaft bearing noise reduction mechanisms consist of several main components: crankshaft bearings, dampers, sound insulation materials and structures, and vibration damping devices. The crankshaft bearings support and maintain the crankshaft's operation, employing ball bearings or plain bearings to reduce friction and wear on the crankshaft. The dampers provide damping force to reduce vibration and impact between the crankshaft and bearings, thereby reducing noise generation. Sound insulation materials and structures isolate and absorb the spread of noise through the use of sound-absorbing materials, soundproofing housings, or soundproofing components. Finally, vibration damping devices are installed in appropriate locations, using devices such as springs, vibration-damping pads, and vibration-damping mounts, to reduce the vibration generated by the crankshaft bearings to the extent that it is transmitted to the frame and body, thereby reducing the overall noise level.
[0004] However, traditional dampers are mostly installed on both sides of the wheels to achieve a certain degree of crankshaft noise reduction. However, since the dampers are located on the wheels, they increase the wheel load, placing additional pressure on the suspension system and handling performance, which may adversely affect the comfort and stability of the motorcycle, and thus negatively impact the driving experience and handling. Dampers installed on the wheels are easily affected by the external environment, especially in harsh road conditions or on uneven surfaces. Harsh environmental factors can reduce the effectiveness of the dampers and even cause them to fail or damage, thus failing to achieve the desired noise reduction effect. Therefore, a motorcycle crankshaft bearing noise reduction mechanism is proposed to address this problem. Utility Model Content
[0005] In order to make up for the above deficiencies, the utility model provides a motorcycle crankshaft bearing noise reduction mechanism, which aims to improve the problem that the dampers on both sides of the wheel in the prior art lead to unsatisfactory noise reduction effects.
[0006] In order to achieve the above purpose, the present invention adopts the following technical solutions:
[0007] A motorcycle crankshaft bearing noise reduction mechanism includes a first housing, a first connecting block fixedly connected to a side wall of the first housing, a first rotating column rotatably connected to the interior of the first connecting block, a connecting collar rotatably connected to the interior of the first rotating column, a base plate fixedly connected to one side of the connecting collar, a damper housing fixedly connected to the outer wall of the base plate, a connector slidably connected to the interior of the damper housing, a spring provided on the outer wall of the connector, and a connecting assembly provided at one end of the connector;
[0008] As a further description of the above technical solution:
[0009] The connecting assembly includes a second rotating column, one end of the connector is fixedly connected to the second rotating column, the outer wall of the second rotating column is rotatably connected to a clamping ring, and the side wall of the clamping ring is fixedly connected to a threaded sleeve;
[0010] As a further description of the above technical solution:
[0011] The side wall of the first shell is fixedly connected to a second sound insulation cotton, and the bottom of the second sound insulation cotton is fixedly connected to an oil sleeve;
[0012] As a further description of the above technical solution:
[0013] The bottom of the second sound insulation cotton is fixedly connected to an oil pipe, one end of the oil pipe is fixedly connected to an oil pump, the top of the oil pump is fixedly connected to a diagonal support plate, and one side of the diagonal support plate is fixedly connected to the side wall of the second sound insulation cotton;
[0014] As a further description of the above technical solution:
[0015] The side wall of the second sound insulation cotton is fixedly connected to the first sound insulation cotton, the side wall of the second sound insulation cotton is rotatably connected to the heat dissipation fan, and the outer wall of the heat dissipation fan is fixedly connected to the sound insulation ring;
[0016] As a further description of the above technical solution:
[0017] A sound insulation ring is fixedly connected to the interior of the second sound insulation cotton, and a first crankshaft is rotatably connected to the interior of the sound insulation ring;
[0018] As a further description of the above technical solution:
[0019] The second sound insulation cotton is fixedly connected to the second shell, and the side wall of the second shell is fixedly connected to the sealing ring;
[0020] As a further description of the above technical solution:
[0021] A sound insulation board is fixedly connected to the second shell side wall at the other end.
[0022] The utility model has the following beneficial effects:
[0023] 1. In the utility model, the connector arranged inside the damper housing is forced to drive the spring to compress, and then it is clamped on the frame through a clamping ring on one side, and then fixed to the frame through a threaded sleeve, thereby achieving the effect of suspension noise reduction, solving the problem of excessive noise when the motorcycle is fixed on the frame in the prior art, and improving the sound insulation performance of the noise reduction mechanism of the motorcycle crankshaft bearing.
[0024] 2. In the utility model, the sound insulation sleeve, the first sound insulation cotton, the second sound insulation cotton and the sound insulation ring arranged inside the mechanism cooperate with each other to achieve the effect of sound insulation and noise reduction, solve the problem of excessive noise during engine operation if the above parts are not available, and improve the noise reduction effect of the motorcycle crankshaft bearing noise reduction mechanism. BRIEF DESCRIPTION OF THE DRAWINGS
[0025] Figure 1 This is a three-dimensional schematic diagram of a motorcycle crankshaft bearing noise reduction mechanism proposed by the present invention;
[0026] Figure 2 This is a cross-sectional schematic diagram of a damper housing of a motorcycle crankshaft bearing noise reduction mechanism proposed in the present invention;
[0027] Figure 3 This is a schematic diagram of the side wall structure of the second sound insulation cotton of a motorcycle crankshaft bearing noise reduction mechanism proposed by the present invention;
[0028] Figure 4 This is a schematic diagram of the internal structure of the second sound insulation cotton of a motorcycle crankshaft bearing noise reduction mechanism proposed by the present invention;
[0029] Figure 5 This is a schematic diagram of the side wall structure of a sealing ring of a motorcycle crankshaft bearing noise reduction mechanism proposed by the present invention;
[0030] Figure 6 This is a schematic diagram of the bottom structure of a sound insulation board of a motorcycle crankshaft bearing noise reduction mechanism proposed by the utility model.
[0031] Legend:
[0032] 1. First housing; 2. Oil pump; 3. Sealing ring; 4. Damper housing; 5. Diagonal support plate; 6. First connecting block; 7. First rotating column; 8. Connecting collar; 9. Bottom plate; 10. Spring; 11. Connector; 12. Second rotating column; 13. Retaining ring; 14. Threaded sleeve; 15. Sound insulation ring; 16. First sound insulation cotton; 17. Second sound insulation cotton; 18. Sound insulation collar; 19. Cooling fan; 20. Second housing; 21. Oil pipe; 22. Sound insulation board; 23. Oil jacket; 24. First crankshaft. DETAILED DESCRIPTION
[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.
[0034] Reference Figure 1 and Figure 2 The utility model provides an embodiment of a motorcycle crankshaft bearing noise reduction mechanism, comprising a first housing 1, a first connecting block 6 being fixedly connected to a side wall of the first housing 1, a first rotating column 7 being rotatably connected to the interior of the first connecting block 6, a connecting collar 8 being rotatably connected to the interior of the first rotating column 7, a bottom plate 9 being fixedly connected to a damper housing 4 on one side of the bottom plate 9, a connector 11 being slidably connected to the interior of the damper housing 4, a spring 10 being provided on the outer wall of the connector 11, a connecting assembly being provided at one end of the connector 11, the connecting assembly comprising a second rotating column 12, a second rotating column 12 being fixedly connected to one end of the connector 11, a snap ring 13 being rotatably connected to the outer wall of the second rotating column 12, a threaded sleeve 14 being fixedly connected to the side wall of the snap ring 13;
[0035] Specifically, the specific steps of using the motorcycle crankshaft bearing noise reduction mechanism are as follows: first, put the retaining ring 13 on the motorcycle frame, and then use screws to tighten the threaded sleeves 14 to ensure a firm connection. During the driving of the motorcycle, due to vibration or vibration, the connector 11 will expand and contract inside the damper housing 4, and will also cause the spring 10 to be set inside the damper housing 4. Subsequently, the spring 10 is compressed by the force to restore it to its original position, which can achieve the noise reduction effect of the crankshaft bearing. In addition, the first connecting block 6 is fixed to the side wall of the first housing 1, and then the base plate 9 is rotated inside the first rotating column 7 under the action of force, which will cause the connecting collar 8 on the outer wall of the first rotating column 7 to rotate, and the connecting collar 8 and the base plate 9 are fixed to each other, which can achieve the effect of suspension noise reduction.
[0036] Reference Figure 3 、 Figure 4 and Figure 5 The side wall of the second sound insulation cotton 17 is fixedly connected to the first sound insulation cotton 16, the side wall of the second sound insulation cotton 17 is rotatably connected to the heat dissipation fan 19, the outer wall of the heat dissipation fan 19 is fixedly connected to the sound insulation ring 15, the inside of the second sound insulation cotton 17 is fixedly connected to the sound insulation ring 18, the inside of the sound insulation ring 18 is rotatably connected to the first crankshaft 24, the inside of the second sound insulation cotton 17 is fixedly connected to the second shell 20, the side wall of the second shell 20 is fixedly connected to the sealing ring 3, and the other end of the side wall of the second shell 20 is fixedly connected to the sound insulation board 22.
[0037] Specifically, first, the first sound insulation cotton 16 is installed inside the first shell 1 of the motorcycle engine. This can reduce the noise emission by absorbing and isolating the propagation of noise. The sound insulation ring 15 is installed on the outer wall of the cooling fan 19. This sound insulation sleeve can reduce the noise generated when the cooling fan 19 is running and prevent the spread of noise. The second sound insulation cotton 17 is installed in a specific area of the engine. The function of this sound insulation cotton is to absorb and isolate noise and reduce its propagation. The sealing ring 3 between the first shell 1 and the second shell 20 is installed to ensure a tight sealing connection, which helps prevent noise from propagating outward from the engine. A sound insulation board 22 is installed on the side wall of the second shell 20. This sound insulation board 22 can further reduce the propagation of noise by reflecting and absorbing noise, which can effectively reduce the noise generated by the engine during operation and reduce its propagation.
[0038] Reference Figure 1 、 Figure 3 and Figure 6 The side wall of the first shell 1 is fixedly connected to the second sound insulation cotton 17, the bottom of the second sound insulation cotton 17 is fixedly connected to the oil sleeve 23, the bottom of the second sound insulation cotton 17 is fixedly connected to the oil pipe 21, one end of the oil pipe 21 is fixedly connected to the oil pump 2, the top of the oil pump 2 is fixedly connected to the diagonal support plate 5, and one side of the diagonal support plate 5 is fixedly connected to the side wall of the second sound insulation cotton 17.
[0039] Specifically, oil is pumped into the engine via oil pump 2 and discharged into the oil jacket 23 through oil pipe 21. This process primarily provides the required lubrication and cooling for the engine. The oil forms a lubricating film within the engine, reducing friction and wear while also helping to cool engine components, thereby improving engine life and performance.
[0040] Working principle: When using the motorcycle crankshaft bearing noise reduction mechanism, first put the snap ring 13 on the motorcycle frame, then use screws to tighten the threaded sleeves 14 to each other. During driving, it is subjected to vibration, causing the connector 11 to retract inside the damper housing 4, and the spring 10 is set inside the damper housing 4. Then, the force of the spring 10 is compressed inside the damper housing 4 to achieve reset. At the same time, the first connecting block 6 is fixed to the side wall of the first housing 1, and then the force of the bottom plate 9 causes it to rotate inside the first rotating column 7, causing the connecting collar 8 on the outer wall of the first rotating column 7 to rotate. The connecting ring 8 and the bottom plate 9 are fixed to each other, achieving the effect of suspension noise reduction. Then, the first sound insulation cotton 16 inside the first shell 1, the sound insulation ring 15 on the outer wall of the cooling fan 19, the sound insulation ring 18 inside the second sound insulation cotton 17, the sealing ring 3 on the side wall of the second shell 20 and the sound insulation board 22 on the side wall of the second shell 20 are connected to reduce the noise emitted by the engine during operation. Then, the oil is discharged into the interior of the engine through the operation of the oil pump 2, and at the same time, the oil pump 2 is discharged into the interior of the oil sleeve 23 through the oil pipe 21, achieving the effect of entering the oil and lubricating and cooling.
[0041] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent replacements for some of the technical features therein. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.
Claims
1. A motorcycle crankshaft bearing noise reduction mechanism, comprising a first housing (1), characterized in that: The side wall of the first housing (1) is fixedly connected to a first connecting block (6), the first connecting block (6) is internally rotatably connected to a first rotating column (7), the first rotating column (7) is internally rotatably connected to a connecting collar (8), one side of the connecting collar (8) is fixedly connected to a bottom plate (9), the outer wall of the bottom plate (9) is fixedly connected to a damper housing (4), the damper housing (4) is internally slidably connected to a connector (11), the outer wall of the connector (11) is provided with a spring (10), and one end of the connector (11) is provided with a connecting assembly.
2. A motorcycle crankshaft bearing noise reduction mechanism according to claim 1, characterized in that: The connecting assembly comprises a second rotating column (12), one end of the connector (11) is fixedly connected to the second rotating column (12), the outer wall of the second rotating column (12) is rotatably connected to a snap ring (13), and the side wall of the snap ring (13) is fixedly connected to a threaded sleeve (14).
3. The motorcycle crankshaft bearing noise reduction mechanism according to claim 1, characterized in that: A second sound insulation cotton (17) is fixedly connected to the side wall of the first shell (1), and an oil sleeve (23) is fixedly connected to the bottom of the second sound insulation cotton (17).
4. The motorcycle crankshaft bearing noise reduction mechanism according to claim 3, characterized in that: The bottom of the second sound insulation cotton (17) is fixedly connected to an oil pipe (21), one end of the oil pipe (21) is fixedly connected to an oil pump (2), the top of the oil pump (2) is fixedly connected to a diagonal support plate (5), and one side of the diagonal support plate (5) is fixedly connected to the side wall of the second sound insulation cotton (17).
5. The motorcycle crankshaft bearing noise reduction mechanism according to claim 3, characterized in that: The side wall of the second sound insulation cotton (17) is fixedly connected to the first sound insulation cotton (16), the side wall of the second sound insulation cotton (17) is rotatably connected to the heat dissipation fan (19), and the outer wall of the heat dissipation fan (19) is fixedly connected to the sound insulation ring (15).
6. The motorcycle crankshaft bearing noise reduction mechanism according to claim 3, characterized in that: A sound insulation collar (18) is fixedly connected to the interior of the second sound insulation cotton (17), and a first crankshaft (24) is rotatably connected to the interior of the sound insulation collar (18).
7. The motorcycle crankshaft bearing noise reduction mechanism according to claim 3, characterized in that: The second sound insulation cotton (17) is fixedly connected to the second shell (20) inside, and the side wall of the second shell (20) is fixedly connected to the sealing ring (3).
8. The motorcycle crankshaft bearing noise reduction mechanism according to claim 7, characterized in that: A sound insulation board (22) is fixedly connected to the side wall of the second shell (20) at the other end.