A sealing ring sleeve toothed chain

Abstract

A toothed chain with a sealing ring sleeve, belonging to the field of chain technology, includes a toothed chain body with a sealing ring sleeve. The toothed chain body includes: an outer chain plate, an inner chain plate, a guide plate, a pin, a sleeve, and a sealing ring. The guide plate has a rectangular frame structure with a downward-protruding arc structure one at the bottom and outward-protruding arc structures two at both ends of the top. The radius of the arc structure two is R″ = R5.5-R7.5. This new invention solves the technical problems of chain slippage, tooth skipping, and excessive vibration of the chain at high speed in some models of Zhenming chains under extreme working conditions and extreme violent driving conditions. By optimizing the guide plate design and reducing the weight of the chain, the overall stability of the chain is improved, ensuring efficient transmission under various complex road conditions.

Description

Technical Field

[0001] This invention belongs to the field of chain technology, specifically relating to a sealing ring sleeve toothed chain. Background Technology

[0002] With the increasing market demand for high-power electric motorcycles, large-displacement gasoline motorcycles, and high-end off-road racing motorcycles, current motorcycle rear-drive transmission technology faces numerous development bottlenecks. Traditional roller chain drive systems struggle to meet market demands for personalization and low noise, with the issue of chain drive noise becoming increasingly prominent. Currently, based on the core technology of a US patent (see US Patent Application No.: US11851134(B2)), a motorcycle rear-drive and silent transmission chain system (hereinafter referred to as "Zhenming Chain") has been widely used in large-displacement motorcycles due to its toothed chain noise reduction structure, effectively solving the vehicle noise problem. However, during road tests conducted by vehicle manufacturers and individual users, it was found that the Zhenming Chain is prone to technical problems such as chain slippage and tooth skipping under aggressive driving conditions in certain specific models, such as large-displacement off-road motorcycles. Utility Model Content

[0003] This invention discloses a sealing ring sleeve toothed chain, designed to solve technical problems encountered by Zhenming chains in certain models under extreme working conditions and aggressive driving, such as chain detachment, tooth skipping, and excessive vibration during high-speed chain operation. By optimizing the guide plate design and reducing the chain weight, the overall stability of the chain is improved, ensuring efficient transmission even under various complex road conditions.

[0004] To achieve the above objectives, the technical solution of this invention is as follows:

[0005] A sealing ring sleeve toothed chain includes a sealing ring sleeve toothed chain body, which comprises: an outer chain plate, an inner chain plate, a guide plate, a pin, a sleeve, and a sealing ring; the guide plate has a rectangular frame structure, with a downwardly protruding arc structure one at the bottom and outwardly protruding arc structures two at both ends of the top, wherein the radius of the arc structure two is R″ = R5.5-R7.5.

[0006] Preferably, the total height of the guide plate is designed according to the linear proportional formula: H = P × (1.05 ~ 1.15), where H is the total height of the guide plate and P is the pitch of the toothed chain body of the sealing ring sleeve.

[0007] Preferably, the guide plate is provided with a circular weight reduction hole, and the center of the weight reduction hole is positioned to satisfy O = f × 1.70 min, where O is the center and f is the center distance between the edges of the chain plate hole.

[0008] Preferably, the weight-reducing hole is located in the lower part of the guide plate, and the radius R of the weight-reducing hole is controlled within 72%-86% of the radius of the guide plate mounting hole.

[0009] Preferably, the mounting holes of the inner chain plate, outer chain plate, and guide plate are made using a precision steel ball extrusion strengthening process.

[0010] Preferably, the guide plate tooth tip is a double curvature composite arc formed by splicing two transition arc segments, and the radius R' of the transition arc is in the range of R1.3-R1.6.

[0011] Preferably, the pin is made using a surface metallization process.

[0012] Preferably, the sealing ring adopts a double-lip star-shaped sealing structure and is made of nitrile rubber or fluororubber.

[0013] Preferably, the contact surface between the sealing ring and the pin is provided with a spiral lubrication groove coaxial with the pin.

[0014] The beneficial effects of this novel sealing ring sleeve toothed chain are as follows:

[0015] This new design solves the technical problems encountered by Zhenming chains on some models under extreme working conditions and aggressive driving, such as chain slippage, tooth skipping, and excessive vibration during high-speed chain operation. By optimizing the guide plate design and reducing the chain weight, the overall stability of the chain is improved, ensuring efficient transmission even under various complex road conditions. Attached Figure Description

[0016] Figure 1 This is a top view of a sealing ring sleeve toothed chain assembly;

[0017] Figure 2 This is a front view of a sealing ring sleeve toothed chain assembly;

[0018] Figure 3 It is the guide plate structure of the patent document with application number US11851134(B2);

[0019] Figure 4 This is a structural diagram of a P12.70 pitch specification with an optimized guide plate.

[0020] Figure 5 This is a structural diagram of a P14.29 pitch specification with an optimized guide plate.

[0021] Figure 6 This is a structural diagram of a P15.875 pitch specification with optimized guide plate.

[0022] Figure 7 This is a diagram of the sealing ring structure;

[0023] Figure 8 This is an overall structural diagram of a chain drive system with a sealing ring sleeve toothed chain.

[0024] Markings in the diagram: 1. Inner chain plate; 2. Guide plate; 3. Outer chain plate; 4. Sealing ring; 5. Pin; 6. Sleeve; 100. Drive wheel; 200. Driven wheel; 300. Chain; Figure 1 In the diagram: A represents the inner segment, and B represents the outer segment; Figure 2 In the middle: P represents the chain pitch; Figure 3 In the diagram: f is the center distance between the edges of the chain plate holes, R″ is the radius of the second arc structure, and H... , This represents the total height of the outer chain plate; Figure 4 In the diagram: f is the center distance between the edge of the chain plate hole, R' is the radius of the transition arc at the bottom of the guide plate, and H is the total height of the guide plate; Figure 5 In the diagram: R represents the shape of the weight-reducing hole in the guide plate, and H represents the total height of the guide plate; Figure 6 In the center: φ is the diameter of the chain plate hole, and O is the center of the guide plate weight reduction hole; Figure 8 In the middle: L is the center distance of the sprockets in the Zhenming chain system. Detailed Implementation

[0025] The following description is merely a preferred embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

[0026] The following embodiments can be understood as a part of the local structure or method of the present invention, or as a combination of embodiments to explain the connotation of a larger range of structures or methods of the present invention.

[0027] In this embodiment, the novel sealing ring sleeve toothed chain, such as Figure 1-8 As shown, the toothed chain body includes a sealing ring sleeve. The sealing ring sleeve toothed chain body comprises: an outer chain plate 3, an inner chain plate 1, a guide plate 2, a pin 5, a sleeve 6, and a sealing ring 4. The guide plate 2 has symmetrically arranged inner chain plates 1 on both sides. The sleeve 6 is interference-fitted with the mounting holes of the inner chain plates 1 and guide plate 2, forming an inner chain link together with the inner chain plates 1 and guide plate 2. The pin 5 passes through the sleeve 6 and is clearance-fitted with the sleeve 6. Both ends of the pin 5 are interference-fitted with the mounting holes of the outer chain plate 3, forming an outer chain link together with the outer chain plate 3. A sealing ring 4 is provided between the outer chain link and the inner chain link. The sealing ring 4 is sleeved on the pin and located outside the mounting holes of the two inner chain plates. Both ends of the sealing ring abut against the inner chain plate and the outer chain plate, respectively. The constraint of the outer chain plate 1 creates a compression state on the sealing ring, which is used to seal the chain grease and form self-lubrication.

[0028] In a further embodiment, such as Figure 4-6As shown, the guide plate 2 has a rectangular frame structure with a downward-protruding arc structure one at the bottom and outward-protruding arc structures two at both ends of the top. The radius of the arc structure two is R″ = R5.5-R7.5, which is intended to further reduce friction loss. At the same time, the above structure realizes the heightening design of the guide plate, which strengthens the axial constraint of the chain 300 by increasing the height of the guide plate 2, reduces the radial runout of the chain 300 during movement, and also plays a key role in strengthening guidance, preventing the chain 300 from derailing due to lateral vibration caused by the motorcycle traveling at high speed. By optimizing the design of the guide plate 2, the vibration and runout of the chain 300 can be effectively reduced, the stability can be enhanced, and the derailment phenomenon can be prevented.

[0029] In a further embodiment, such as Figure 4-6 As shown, guide plate 2 serves a positioning and guiding function during transmission and does not directly participate in the meshing of sprocket teeth. For existing Zhenming chain product models, three standard pitch specifications are provided: P12.70, P14.29, and P15.875. The overall height design of guide plate 2 follows a linear proportional formula: H = P × (1.05~1.15). This coefficient range applies to all pitch specifications, and an appropriate amplification factor can be selected within a given range according to specific operating conditions to ensure the operational stability and structural compactness of the transmission system.

[0030] In a further embodiment, such as Figure 4-6 As shown, the guide plate 2 is provided with weight reduction holes, and the main body of the guide plate 2 is reduced by 12%. The center of the weight reduction hole is positioned to satisfy O = f × 1.70 min. The shape R of the weight reduction hole is usually circular and is preferably arranged away from the stress concentration area. It is placed in the lower part of the guide plate 2. The diameter R of the weight reduction hole is controlled within the range of 72%-86% of the radius of the guide plate mounting hole.

[0031] In a further embodiment, such as Figure 1 , 2 As shown in Figures 4-6, the mounting holes of the inner chain plate 1, outer chain plate 3, and guide plate 2 are made using a precision steel ball extrusion strengthening process to release the original stress and improve fatigue performance.

[0032] In a further embodiment, such as Figure 4-6 As shown, the guide plate with two tooth tips adopts a double curvature composite arc transition form (i.e., it is composed of two transition arcs spliced ​​together), and the radius R' of the transition arc is in the range of R1.3-R1.6 to disperse stress concentration.

[0033] In a further embodiment, such as Figure 4-6 As shown, the processing technology of the pin 5 is selected according to different vehicle models and working conditions, and different surface metal infiltration processes are selected, including but not limited to Cr infiltration, V infiltration, Cr-V co-infiltration and other processes, in order to improve the strength and wear resistance of the chain 300.

[0034] In a further embodiment, such as Figure 4-6 As shown, the sealing ring 4 adopts a double-lip star-shaped sealing structure with nitrile rubber or fluororubber material to ensure good sealing performance and high temperature and oil resistance. In addition, a spiral lubrication groove coaxial with the pin is added to the contact surface of the sealing ring to improve high temperature resistance, ensure sealing effect under extreme working conditions, and reduce wear caused by temperature rise.

[0035] like Figure 8 As shown, the chain 300 (the toothed chain body with sealing ring sleeve) is connected to the driving wheel and the driven wheel, and during the transmission process, it meshes with the driving wheel 100 and the driven wheel 200 to form a complete chain transmission system.

Claims

1. A sealing ring sleeve toothed chain, comprising a sealing ring sleeve toothed chain body, the sealing ring sleeve toothed chain body comprising: The outer link plate, inner link plate, guide plate, pin, sleeve and sealing ring are characterized in that the guide plate is a rectangular frame structure, with a downwardly protruding arc structure one at the bottom and two outwardly protruding arc structures two at the top two ends, the radius of the arc structure two being R″=R5.5-R7.

5.

2. The toothed chain with sealing ring sleeve as described in claim 1, characterized in that: The total height of the guide plate is designed according to the linear proportional formula: H = P × (1.05 ~ 1.15), where H is the total height of the guide plate and P is the pitch of the toothed chain body of the sealing ring sleeve.

3. The sealing ring sleeve toothed chain as described in claim 2, characterized in that: The guide plate is provided with a circular weight reduction hole, and the center of the weight reduction hole is positioned to satisfy O = f × 1.70 min, where O is the center and f is the center distance of the chain plate hole.

4. The toothed chain with sealing ring sleeve as described in claim 3, characterized in that: The weight reduction hole is located in the lower part of the guide plate, and the radius R of the weight reduction hole is controlled within 72%-86% of the radius of the guide plate mounting hole.

5. The toothed chain with sealing ring sleeve as described in claim 4, characterized in that: The mounting holes of the inner chain plate, outer chain plate, and guide plate are made using a precision steel ball extrusion strengthening process.

6. The toothed chain with sealing ring sleeve as described in claim 5, characterized in that: The guide plate-shaped tooth tip is a double curvature composite arc formed by splicing two transition arc segments, and the radius R' of the transition arc is in the range of R1.3-R1.

6.

7. The sealing ring sleeve toothed chain as described in claim 6, characterized in that: The pin is made using a surface metallization process.

8. The toothed chain with sealing ring sleeve as described in claim 7, characterized in that: The sealing ring adopts a double-lip star-shaped sealing structure and is made of nitrile rubber or fluororubber.

9. A toothed chain with a sealing ring sleeve as described in claim 8, characterized in that: The contact surface between the sealing ring and the pin is provided with a spiral lubrication groove coaxial with the pin.

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