Mute tooth-shaped chain transmission system of motorcycle

Abstract

A mute tooth-shaped chain transmission system of a motorcycle relates to the technical field of chain transmission and comprises a driving chain wheel, a driven chain wheel, a mute tooth-shaped chain, a tensioning plate, a guide plate and an oil injection mechanism, the mute tooth-shaped chain is connected between the driving chain wheel and the driven chain wheel in a transmission mode, the tensioning plate is arranged on one side of a loose edge of the mute tooth-shaped chain, and the guide plate is arranged on one side of a tight edge of the mute tooth-shaped chain. An oil injection mechanism is arranged on the side, close to the driving chain wheel, of the upper portion of the tensioning plate, the oil injection mechanism is connected with the back face of the loose edge of the mute tooth-shaped chain through an oil guide groove formed in the tensioning plate, and the oil injection mechanism, the tensioning plate and the guide plate are fixedly connected with a motorcycle frame. The operation stability of the motorcycle transmission system can be effectively improved, noise is reduced, and the service life of the system is prolonged.

Description

Technical Field

[0001] This invention relates to the field of chain drive technology, specifically to a silent toothed chain drive system for motorcycles. Background Technology

[0002] Patent document CN202011336533.9 discloses a silent drive chain system for motorcycle rear drive transmission, relating to the field of motorcycle chain drive technology. It includes a small sprocket, a large sprocket, and a silent drive chain. The silent drive chain is a toothed chain, comprising: an outer chain plate, an inner chain plate, a guide plate, a pin, a sleeve, and a shock-absorbing sealing ring. The sleeve is interference-fitted with the mounting holes of the inner chain plate and the guide plate, forming an inner chain link together with the inner chain plate and the guide plate. The pin passes through the sleeve and has a clearance fit with the sleeve. Both ends of the pin are interference-fitted with the mounting holes of the outer chain plate, forming an outer chain link together with the outer chain plate. A shock-absorbing sealing ring is provided between the outer chain link and the inner chain link. This patent document, through innovative design of the silent drive chain and its chain drive system for motorcycles, overcomes the technical limitations of traditional chain drives, enabling motorcycles to maintain the stability and low noise of the chain drive system even during high-speed and intense movement, meeting the personalized low-noise and high-wear-resistance needs of high-end motorcycles, and effectively preventing dangerous accidents. Meanwhile, this paper reduces transmission noise by adding a chain support structure to the motorcycle rear drive chain drive system, eliminates the dangers of speedometer sensor malfunction and chain detachment from sprockets caused by excessive chain length, and improves the wear resistance, fatigue resistance and smoothness of the chain drive, thus achieving better silent transmission.

[0003] However, this patent document has the following defects:

[0004] 1. The chain support has a simple structure, but in actual use, it cannot achieve a lubrication effect with the toothed chain. Moreover, the contact area with the toothed chain is small, so its noise reduction function needs to be further improved. It also has limited tensioning effect on the chain, and the silent toothed chain requires regular maintenance.

[0005] 2. The chain support is only set on the tight side of the toothed chain. When the toothed chain is running at high speed, it is difficult to maintain the stability of the chain operation by relying solely on the chain support set on the tight side. Utility Model Content

[0006] This invention discloses a silent toothed chain drive system for motorcycles, which aims to solve the problems described in sections 1 and 2 of the background art. This drive system can be applied to motorcycles driven by electric motors, internal combustion engines, or hybrid power, and can effectively reduce the operating noise of the drive system, reduce chain wear, increase the stability of system operation, and improve the service life of the drive system.

[0007] To achieve the above objectives, the technical solution of this invention is as follows:

[0008] A silent toothed chain drive system for motorcycles includes a drive sprocket, a driven sprocket, a silent toothed chain connected between the drive sprocket and the driven sprocket, a tension plate, a guide plate, and an oiling mechanism. The silent toothed chain has a tension plate on its slack side and a guide plate on its tight side. An oiling mechanism is located above the tension plate near the drive sprocket. The oiling mechanism is connected to the back of the slack side of the silent toothed chain through an oil guide groove located in the tension plate. The oiling mechanism, tension plate, and guide plate are fixedly connected to the motorcycle frame.

[0009] Preferably, the tensioning plate is located along the slack side between the driving sprocket and the driven sprocket, and includes a tensioning plate frame and a tensioning plate guide rail fixedly connected to the tensioning plate frame near the slack side. The tensioning plate guide rail is composed of three arc-shaped structures connected in sequence, including a first arc segment and a second arc segment located at both ends, and a third arc segment connected between the first arc segment and the second arc segment. The end face of the tensioning plate guide rail facing the slack side is provided with a first guide groove that cooperates with the slack side.

[0010] Preferably, the depth of the first guide groove is 5.02%-9.85% of the width of the tension plate guide rail, and the tension plate frame is provided with an oil guide groove that passes through the first guide groove.

[0011] Preferably, the oil injection mechanism includes a housing fixedly connected to the vehicle frame, a high-pressure oil chamber is provided inside the housing, an oil nozzle is provided on the side of the high-pressure oil chamber facing the loose side, the oil nozzle is opposite to the outer port of the oil guide groove, the oil guide groove is a trapezoidal structure, and one end of the long side of the trapezoidal structure is located at the bottom of the first guide groove, the outer end of the high-pressure oil chamber is connected to an oil inlet pipe, and a solenoid valve is installed on the oil inlet pipe.

[0012] Preferably, the guide plate is installed along its entire length on the tight side between the driving sprocket and the driven sprocket, and the end of the guide plate facing the tight side is provided with a second guide groove.

[0013] Preferably, the guide plate has an arc-shaped guide rail on the side facing the tight edge, and the second guide groove is provided on the inner end face of the arc-shaped guide rail. The depth of the second guide groove is 2.1%-3.2% of the width of the arc-shaped guide rail, and the second guide groove is used in conjunction with the tight edge.

[0014] Preferably, the "through length" refers to the length of the tensioning plate guide rail being greater than or equal to the length of the slack side and the length of the guide plate being greater than or equal to the length of the tight side. The tensioning plate frame and the guide plate are respectively provided with bolt holes for connecting to the vehicle frame.

[0015] The beneficial effects of this novel silent toothed chain drive system for motorcycles:

[0016] 1. This new design can be applied to hybrid power transmission systems for large-displacement motorcycles, reducing system operating noise and increasing system lifespan. 2. The tension plate guide rail of this new design adopts a three-segment arc design, matching the shape of the slack side, reducing system wear and improving transmission efficiency. 3. This new design, through the setting of an oil injection mechanism and in conjunction with the tension plate design, uses a toothed chain tensioning transmission method to achieve a silent toothed chain that requires no maintenance for life. 4. This new design, by setting the first and second guide grooves, can effectively control the fluctuations in chain operation, avoid tooth skipping, and make the system operation more stable. 5. This new design adopts a trapezoidal oil guide groove design to lubricate the back of the chain and the tension plate guide rail, reducing system wear fatigue and extending system lifespan. 6. The tension plate guide rail and guide plate of this new design are both continuous in length, ensuring the stability of the silent toothed chain operation. Attached Figure Description

[0017] To more clearly illustrate the technical solution of this invention, the accompanying drawings used in the embodiments are briefly described below, which constitute a part of the specification and are used together with the embodiments of this invention to explain this invention, but do not constitute a limitation on this invention.

[0018] Figure 1 A schematic diagram of the structure of this novel invention;

[0019] Figure 2 A partial cross-sectional view of the present invention.

[0020] 1. Oil injection mechanism mounting bolt one; 2. Oil injection mechanism; 3. Oil injection mechanism mounting bolt two; 4. Tensioner plate frame; 5. Tensioner plate mounting bolt; 6. Tensioner plate guide rail; 7. Silent toothed chain; 8. Drive sprocket; 9. Guide plate mounting bolt one; 10. Guide plate; 11. Guide plate mounting bolt two; 12. Driven sprocket; 13. Oil inlet pipe; 14. High-pressure oil chamber; 15. Oil injection hole; 16. Oil guide groove. Detailed Implementation

[0021] The technical solutions of this invention will now be clearly and completely described with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0022] The following embodiments can be understood as explaining a partial structure of the present invention individually, or as explaining a larger structure of the present invention through a combination of multiple embodiments.

[0023] This invention relates to a silent toothed chain drive system for motorcycles, such as... Figure 1 , 2As shown, the system includes a drive sprocket 8, a driven sprocket 12, a silent toothed chain 7 connected between the drive sprocket 8 and the driven sprocket 12, a tension plate, a guide plate 10, and an oiling mechanism 2. The silent toothed chain 7 has a tension plate on its slack side and a guide plate 10 on its tight side. An oiling mechanism 2 is located above the tension plate near the drive sprocket 8. The oiling mechanism 2 is connected to the back of the silent toothed chain 7's slack side via an oil guide groove 16 located within the tension plate. The oiling mechanism 2, tension plate, and guide plate 10 are fixedly connected to the motorcycle frame. For details of the structure of this novel silent toothed chain 7, please refer to the silent drive chain system for motorcycle rear drive transmission disclosed in patent application CN202011336533.9.

[0024] In this embodiment, as Figure 1 , 2 As shown, the tensioning plate is located along the slack side between the driving sprocket 8 and the driven sprocket 12, and includes a tensioning plate frame 4 and a tensioning plate guide rail 6 fixedly connected to the tensioning plate frame 4 near the slack side. The tensioning plate guide rail 6 is composed of three arc-shaped structures connected in sequence, including a first arc segment and a second arc segment located at both ends, and a third arc segment connecting the first and second arc segments (e.g., ...). Figure 1 As shown in the figure, the end face of the tensioning plate guide rail 6 facing the slack side is provided with a first guide groove (a common structure used to constrain the slack side, not shown in the figure) that is used to cooperate with the slack side.

[0025] In this embodiment, as Figure 1 , 2 As shown, the depth of the first guide groove is 5.02%-9.85% of the width of the tension plate guide rail 6. The tension plate frame 4 is provided with an oil guide groove 16 that passes through the first guide groove. The lubricating oil enters between the first guide groove and the silent toothed chain through the oil guide groove to reduce the friction between the silent toothed chain and the tension plate. It can be understood that the silent toothed chain carries the lubricating oil through the guide plate, which can reduce the friction between the silent toothed chain and the second guide groove.

[0026] In this embodiment, as Figure 1 , 2As shown, the oil injection mechanism 2 includes a housing fixedly connected to the frame. A high-pressure oil chamber 14 is provided inside the housing. An injector 15 is located on the loose side of the high-pressure oil chamber 14, and the injector 15 is opposite the outer port of the oil guide groove 16. The oil guide groove 16 has a trapezoidal structure, with one long side of the trapezoidal structure located at the bottom of the first guide groove. An oil inlet pipe 13 is connected to the outer end of the high-pressure oil chamber 14, and a solenoid valve is installed on the oil inlet pipe 13. Typically, the oil inlet pipe is connected to an oil pump. Oil injection can be manually controlled via a control panel mounted on the motorcycle, or automatically controlled via a control circuit board mounted on the frame. After the lubricating oil enters the high-pressure oil chamber 14, the inner diameter of the injector is significantly reduced, causing the oil in the injector to be rapidly injected into the oil guide groove 16.

[0027] In this embodiment, as Figure 1 , 2 As shown, the guide plate 10 is installed along its length on the tight side between the drive sprocket 8 and the driven sprocket 12. The end of the guide plate 10 facing the tight side is provided with a second guide groove (a common structure, not shown in the figure).

[0028] In this embodiment, as Figure 1 , 2 As shown, the guide plate 10 is provided with an arc-shaped guide rail (such as...) on the side facing the tight edge. Figure 1 As shown in the figure (not marked), the second guide groove is provided on the inner end face of the arc-shaped guide rail, and the depth of the second guide groove is 2.1%-3.2% of the width of the arc-shaped guide rail. The second guide groove is used in conjunction with the tight edge.

[0029] In this embodiment, as Figure 1 As shown, the "through length" refers to the length of the tension plate guide rail 6 being greater than or equal to the length of the slack side and the length of the guide plate 10 being greater than or equal to the length of the tight side. The tension plate frame 4 and the guide plate 10 are respectively provided with bolt holes for connecting to the vehicle frame.

[0030] The working principle of this new type:

[0031] This new technology can be applied to motorcycles driven by electric motors, motorcycles driven by internal combustion engines, and motorcycles driven by hybrid powertrains. Motorcycle hybrids, also known as hybrid electric motorcycles, refer to models that use traditional gasoline fuel while incorporating an electric motor or engine to improve low-speed power output and fuel consumption.

[0032] This novel design, through the cooperation of a tensioning plate, guide plate, oil injection mechanism, and silent toothed chain, overcomes the deficiency of low rotational fatigue strength in motorcycle drive chains. It effectively reduces system noise, improves system stability, increases transmission efficiency, extends service life, and enhances system load-bearing capacity. The first guide groove controls the lateral movement of the slack side of the silent toothed chain during operation, while the second guide groove controls the lateral movement of the tight side. Due to its continuous design, the risk of chain skipping is greatly reduced, improving system stability. Unlike conventional camshaft oil injection lubrication, this novel design uses a high-pressure oil chamber to supply lubricating oil through injection holes and guide grooves. Compared to traditional lubrication methods, this results in more stable lubrication and higher oil utilization.

Claims

1. A silent toothed chain drive system for motorcycles, characterized in that: The system includes a drive sprocket, a driven sprocket, a silent toothed chain connecting the drive sprocket and the driven sprocket, a tension plate, a guide plate, and an oiling mechanism. The silent toothed chain has a tension plate on its slack side and a guide plate on its tight side. An oiling mechanism is located above the tension plate near the drive sprocket. The oiling mechanism is connected to the back of the slack side of the silent toothed chain through an oil guide groove located in the tension plate. The oiling mechanism, tension plate, and guide plate are fixedly connected to the motorcycle frame.

2. The motorcycle silent toothed chain drive system as described in claim 1, characterized in that: The tensioning plate is located along the slack side between the driving sprocket and the driven sprocket. It includes a tensioning plate frame and a tensioning plate guide rail fixedly connected to the tensioning plate frame near the slack side. The tensioning plate guide rail is composed of three arc-shaped structures connected in sequence. It includes a first arc segment and a second arc segment located at both ends, and a third arc segment connected between the first arc segment and the second arc segment. The end face of the tensioning plate guide rail facing the slack side is provided with a first guide groove that cooperates with the slack side.

3. The motorcycle silent toothed chain drive system as described in claim 2, characterized in that: The depth of the first guide groove is 5.02%-9.85% of the width of the tension plate guide rail, and the tension plate frame is provided with an oil guide groove that passes through the first guide groove.

4. The motorcycle silent toothed chain drive system as described in claim 3, characterized in that: The oil injection mechanism includes a housing fixedly connected to the vehicle frame. The housing contains a high-pressure oil chamber. A fuel injector is provided on the side of the high-pressure oil chamber facing the loose side. The fuel injector is opposite to the outer port of the oil guide groove. The oil guide groove has a trapezoidal structure, and one end of the long side of the trapezoidal structure is located at the bottom of the first guide groove. An oil inlet pipe is connected to the outer end of the high-pressure oil chamber, and a solenoid valve is installed on the oil inlet pipe.

5. A motorcycle silent toothed chain drive system as described in claim 4, characterized in that: The guide plate is installed along its entire length on the tight side between the driving sprocket and the driven sprocket, and the end of the guide plate facing the tight side is provided with a second guide groove.

6. The motorcycle silent toothed chain drive system as described in claim 5, characterized in that: The guide plate has an arc-shaped guide rail on the side facing the tight edge, and the second guide groove is provided on the inner end face of the arc-shaped guide rail. The depth of the second guide groove is 2.1%-3.2% of the width of the arc-shaped guide rail. The second guide groove is used in conjunction with the tight edge.

7. A motorcycle silent toothed chain drive system as described in claim 6, characterized in that: The aforementioned length refers to the length of the tensioning plate guide rail being greater than or equal to the length of the slack side and the length of the guide plate being greater than or equal to the length of the tight side. The tensioning plate frame and the guide plate are respectively provided with bolt holes for connecting to the vehicle frame.

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