A noise reduction component for a motorcycle clutch

Abstract

This utility model discloses a noise reduction component for a motorcycle clutch, specifically relating to the field of motorcycle clutch technology. It includes: a clutch drum, a clutch pinion, a transmission gear, a gearbox output shaft, multiple friction plates and multiple steel plates; a sound-absorbing washer, multiple arc-shaped mounting grooves, multiple arc-shaped sound insulation plates, a protective sound insulation pad assembly, and a sound insulation ring. The sound-absorbing washer is located at the connection between the transmission gear and the clutch drum. The multiple arc-shaped mounting grooves are formed at the inner end of the clutch drum. The multiple arc-shaped sound insulation plates are respectively located inside the multiple arc-shaped sound insulation plates. The protective sound insulation pad assembly is fitted onto the outer end of the gearbox output shaft. This utility model addresses multiple sources of noise simultaneously, significantly reducing the overall noise level of the clutch assembly through sound absorption, sound insulation, damping, and other means, especially improving the "hissing" noise at idle and enhancing the riding experience.

Description

Technical Field

[0001] This utility model relates to the field of motorcycle clutch technology, specifically to a noise reduction component for a motorcycle clutch. Background Technology

[0002] A common phenomenon in motorcycle clutches, especially wet multi-plate clutches, is a "scratching" or "clattering" sound at idle or in neutral, often referred to as "clutch noise." This is not a malfunction but rather a characteristic of its operating principle, although excessive noise can negatively impact the riding experience. The main sources of this noise include:

[0003] 1. Gear meshing and impact noises: When the engine is idling, the gears on the power take-off shaft and the gears (or splines) in the clutch assembly are continuously meshed. However, since the clutch is disengaged (clutch lever is engaged), the gears on the gearbox side are stationary. The instability (minor fluctuations) of the engine speed causes the tooth surfaces of the driving and driven gears to continuously collide and rub slightly, producing a "rustling" sound.

[0004] 2. Friction noise between clutch plates: Even when the clutch is disengaged, a bunch of friction plates and steel plates may still produce slight relative movement and friction due to engine vibration.

[0005] Currently, the internal components of a motorcycle clutch are tightly connected during actual operation, making it difficult to install soundproofing structures. Improvements can only be made through materials, but noise still occurs during operation, which affects the riding experience. Utility Model Content

[0006] The purpose of this invention is to provide a noise reduction component for a motorcycle clutch to address the aforementioned shortcomings in the technology.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a noise reduction component for a motorcycle clutch, comprising:

[0008] The clutch includes a large clutch drum, a small clutch drum, a transmission gear, a gearbox output shaft, multiple friction plates, and multiple steel plates. The small clutch drum is located inside the large clutch drum, and the transmission gear is fixedly located at the rear end of the large clutch drum. The large clutch drum is rotatably connected to the gearbox output shaft via bearings, and the small clutch drum is synchronously connected to the gearbox output shaft via splines. The friction plates and steel plates are spaced apart, and the large clutch drum and the small clutch drum are connected and driven by multiple friction plates and steel plates.

[0009] The system comprises a sound-absorbing washer, multiple arc-shaped mounting slots, multiple arc-shaped sound insulation panels, a protective sound insulation pad assembly, and a sound insulation ring. The sound-absorbing washer is located at the connection between the transmission gear and the clutch drum. The multiple arc-shaped mounting slots are formed at the inner end of the clutch drum. The multiple arc-shaped sound insulation panels are respectively located inside the multiple arc-shaped sound insulation panels. The protective sound insulation pad assembly is sleeved on the outer end of the gearbox output shaft. The protective sound insulation pad assembly is located between the rear end of the clutch swivel drum and the inside of the clutch drum. The sound insulation ring is fixedly located on the inner wall of the clutch swivel drum.

[0010] Preferably, the protective sound insulation pad assembly includes a sound insulation plate in the middle and two anti-friction plates on both sides thereon, wherein the sound insulation plate and the two anti-friction plates are stacked and fixed together.

[0011] Preferably, the sound-absorbing gasket is made of damping sound-insulating felt material, which can reduce resonance noise.

[0012] Preferably, the multiple arc-shaped sound insulation panels and sound insulation rings are made of ultra-thin sound insulation felt material, which facilitates their installation and fixation on the clutch drum and clutch pin drum. The arc-shaped sound insulation panels can absorb noise inside the clutch drum, and the sound insulation rings can absorb noise generated by the springs inside the clutch pin drum.

[0013] Preferably, the sound insulation board is a polyester fiber sound-absorbing board, which can isolate the noise from the friction between the clutch drum and the clutch pin drum.

[0014] The technical effects and advantages provided by this utility model in the above technical solution are as follows:

[0015] 1. Multi-dimensional noise reduction: It addresses multiple sources of noise (gear meshing, plate friction, spring vibration, structural resonance) simultaneously. Through various means such as sound absorption, sound insulation, and damping, it significantly reduces the overall noise level of the clutch assembly, especially improving the "rustling" noise at idle speed and enhancing the riding experience.

[0016] 2. High space utilization and compact structure: All noise reduction components are specially designed according to the internal space of the clutch. For example, the arc-shaped sound insulation plate is embedded in the groove of the inner wall of the drum, and the protective sound insulation pad is sleeved on the shaft. No extra space is required, which perfectly solves the industry problem of the clutch having a compact internal structure and making it difficult to install noise reduction components.

[0017] 3. Excellent durability and no impact on performance: The selection of noise reduction materials not only considers acoustic characteristics but also high temperature resistance, wear resistance, and oil resistance (suitable for wet clutch environments). The design of the anti-friction pads ensures the wear resistance of the sound insulation components themselves, preventing new noise from being generated or affecting the normal engagement and disengagement functions of the clutch due to wear.

[0018] 4. High versatility and easy to promote: The noise reduction component has a simple structure and is easy to install. It does not require large-scale modifications to the existing clutch design and can be widely used in various motorcycles and motor vehicles that use wet multi-plate clutches. It has high market promotion value. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0020] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0021] Figure 2 This is a schematic diagram of the overall exploded structure of this utility model;

[0022] Figure 3 This is a schematic diagram of the connection structure between the clutch drum and the transmission gear of this utility model.

[0023] Figure 4 This is a three-dimensional structural diagram of the clutch drum and the arc-shaped sound insulation plate of this utility model;

[0024] Figure 5 This is a three-dimensional structural diagram of the protective sound insulation pad assembly of this utility model;

[0025] Figure 6 This is a three-dimensional structural diagram of the clutch drum and sound insulation ring of this utility model.

[0026] Explanation of reference numerals in the attached figures:

[0027] 1. Clutch drum; 2. Clutch pinion; 3. Transmission gear; 4. Gearbox output shaft; 5. Friction plate; 6. Steel plate; 7. Sound-absorbing washer; 8. Arc-shaped mounting groove; 9. Arc-shaped sound insulation board; 10. Protective sound insulation pad assembly; 11. Sound insulation ring; 12. Sound insulation board; 13. Anti-friction plate. Detailed Implementation

[0028] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0029] This utility model relates to a noise reduction component for a motorcycle clutch, which aims to effectively reduce the "rustling" or "crackling" noise generated by a wet multi-plate clutch at idle or in neutral through structural optimization and material application, thereby improving the riding experience. The specific embodiments of this utility model are described in detail below with reference to the accompanying drawings.

[0030] Implementation Method 1: Assembly and Noise Reduction Principle of Basic Structure

[0031] refer to Figures 1 to 6 The noise reduction assembly mainly includes a clutch drum 1, a clutch pinion 2, a transmission gear 3, a gearbox output shaft 4, multiple friction plates 5, and multiple steel plates 6. The clutch pinion 2 is synchronously connected to the gearbox output shaft 4 via splines and is responsible for power output. The clutch drum 1 is rotatably connected to the gearbox output shaft 4 via bearings, and its interior houses the clutch pinion 2 and the friction plates. The friction plates 5 and steel plates 6 are spaced apart and pressed together by pressure plates and springs to achieve power engagement and disengagement.

[0032] The noise reduction function is mainly achieved through the following components:

[0033] Sound-absorbing washer 7: installed at the connection between transmission gear 3 and clutch drum 1 ( Figure 3 The washer is made of damping and sound-insulating felt material, which can effectively absorb the high-frequency vibration generated during gear meshing and reduce the transmission of resonance noise to the clutch drum 1.

[0034] Arc-shaped sound insulation panel 9: Multiple arc-shaped mounting grooves 8 are machined into the inner end of the clutch drum 1 ( Figure 4 The curved sound insulation panel 9 is embedded within it. These sound insulation panels are made of ultra-thin sound insulation felt material, which does not take up extra space and mainly absorbs air noise and structural noise caused by friction of the clutch drum 1 and gear transmission.

[0035] Soundproof ring 11: Fixedly installed on the inner wall of clutch drum 2 ( Figure 6 It also uses ultra-thin sound-insulating felt material. Its function is to isolate and absorb the vibration noise generated when the pressure spring inside the clutch drum is working.

[0036] Protective sound insulation pad assembly 10: Sleeve onto the outer end of the gearbox output shaft 4, located between the rear end of the clutch small drum 2 and the inside of the clutch large drum 1. Figure 2 , Figure 5 This component further isolates mechanical noise that may be transmitted between the two drums.

[0037] Implementation Method 2: Detailed Structure of the Protective Sound Insulation Pad Assembly

[0038] The protective sound insulation pad assembly 10 is formed by stacking and fixing the sound insulation plate 12 in the middle and the two anti-friction plates 13 on both sides. Figure 5 The sound insulation panel 12 is made of polyester fiber sound-absorbing board, which has good sound absorption performance and toughness, and can effectively block the friction noise generated between the clutch drum 1 and the clutch small drum 2 due to relative movement. The anti-friction plates 13 on both sides are made of wear-resistant materials (such as polytetrafluoroethylene or special engineering plastics), which not only ensures the durability of the components themselves, but also avoids the generation of additional noise from contact with rotating parts.

[0039] Implementation Method 3: Material Selection and Installation Optimization

[0040] All sound insulation materials (sound-absorbing gaskets 7, curved sound insulation panels 9, sound insulation rings 11, and sound insulation panels 12) are made of ultra-thin, high-density acoustic materials to ensure maximum noise reduction within a limited space without affecting the clutch's heat dissipation and original performance. Installation methods include embedded or sleeve-mounted fixing, requiring no changes to the clutch's main structure, offering strong compatibility and facilitating production and maintenance.

[0041] This invention effectively solves the problem of excessive noise from motorcycle clutches affecting the riding experience, providing an efficient, compact, and reliable noise reduction solution. Specifically, this invention addresses the issue that in existing technologies, the internal structures of a motorcycle clutch are tightly coupled during actual operation, making it difficult to install soundproofing structures. Improvements can only be made to the materials, but noise still occurs during operation, which affects the riding experience.

[0042] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A noise reduction assembly for a motorcycle clutch, characterized by, include: The clutch drum (1), clutch small drum (2), transmission gear (3), gearbox output shaft (4), multiple friction plates (5) and multiple steel plates (6) are provided. The clutch small drum (2) is located inside the clutch drum (1). The transmission gear (3) is fixedly located at the rear end of the clutch drum (1). The clutch drum (1) and the gearbox output shaft (4) are rotatably connected by bearings. The clutch small drum (2) and the gearbox output shaft (4) are synchronously connected by splines. The friction plates (5) and steel plates (6) are distributed at intervals. The clutch drum (1) and the clutch small drum (2) are connected and driven by multiple friction plates (5) and steel plates (6). The system comprises a sound-absorbing washer (7), multiple arc-shaped mounting grooves (8), multiple arc-shaped sound insulation plates (9), a protective sound insulation pad assembly (10), and a sound insulation ring (11). The sound-absorbing washer (7) is located at the connection between the transmission gear (3) and the clutch drum (1). Multiple arc-shaped mounting grooves (8) are opened at the inner end of the clutch drum (1). Multiple arc-shaped sound insulation plates (9) are respectively located inside the multiple arc-shaped sound insulation plates (9). The protective sound insulation pad assembly (10) is sleeved on the outer end of the gearbox output shaft (4). The protective sound insulation pad assembly (10) is located between the rear end of the clutch small drum (2) and the inside of the clutch drum (1). The sound insulation ring (11) is fixedly located on the inner wall of the clutch small drum (2).

2. The noise reduction component for a motorcycle clutch according to claim 1, characterized in that: The protective sound insulation pad assembly (10) includes a sound insulation plate (12) in the middle and two anti-friction plates (13) on both sides, wherein the sound insulation plate (12) and the two anti-friction plates (13) are stacked and fixed together.

3. A noise reduction assembly for a motorcycle clutch as claimed in claim 1, wherein: The sound-absorbing pad (7) is a damping sound insulation felt material, which can reduce resonance noise.

4. A noise reduction assembly for a motorcycle clutch as defined in claim 1, wherein: The multiple arc-shaped sound insulation panels (9) and sound insulation rings (11) are all made of ultra-thin sound insulation felt material, which makes it easy to install and fix them on the clutch drum (1) and clutch small drum (2). The arc-shaped sound insulation panels (9) can absorb the noise inside the clutch drum (1), and the sound insulation rings (11) can absorb the noise generated by the spring inside the clutch small drum (2).

5. A noise reduction assembly for a motorcycle clutch as claimed in claim 2, wherein: The sound insulation board (12) is a polyester fiber sound-absorbing board, which can isolate the noise of friction between the clutch drum (1) and the clutch spool (2).

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