Bicycle chain

Abstract

A bicycle chain belongs to the technical field of transmission chains and comprises a chain body formed by assembling inner chain plates, outer chain plates, pin shafts and rollers, the outer surfaces of the two opposite outer chain plates of the chain body form a first end face and a second end face respectively, the first end face and the second end face are flat end faces respectively, and the farthest distance between the first end face and the second end face is 5.1-5.15 mm; the middle portions of the inner surfaces of the two opposite inner chain plates are flat faces and form a third end face and a fourth end face respectively, and the distance between the third end face and the fourth end face ranges from 2.15 mm to 2.25 mm. The utility model provides a 12-speed bicycle chain which solves the problem that a brand-new 12-speed bicycle chain needs to be developed urgently in the current market.

Description

Technical Field

[0001] This invention belongs to the field of transmission chain technology, specifically relating to a bicycle chain. Background Technology

[0002] With the development of the bicycle industry, more and more new derailleur manufacturers are emerging, and the corresponding speeds of derailleurs are also getting higher and higher. However, with the reduction of the spacing between the newly introduced freewheels, the original chains can no longer meet the matching relationship between the existing freewheels, and a brand-new 12-speed bicycle chain needs to be developed. Utility Model Content

[0003] This invention discloses a bicycle chain, aiming to provide a completely new 12-speed bicycle chain.

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

[0005] A bicycle chain includes a chain body assembled from inner chain plates, outer chain plates, pins, and rollers. The outer surfaces of two opposing outer chain plates of the chain body respectively form end face one and end face two, which are flat end faces and the maximum distance between them is 5.1-5.15 mm. The middle part of the inner surfaces of the two opposing inner chain plates is a flat surface and forms end face three and end face four respectively, with a distance of 2.15-2.25 mm between end face three and end face four.

[0006] Preferably, the two end faces of the pin are flush with end face one and end face two, respectively, that is, the distance between the two end faces of the pin is 5.1-5.15mm.

[0007] Preferably, the inner surfaces of the middle part of the two opposing outer chain plates are flat surfaces and respectively form end face five and end face six, and the distance between end face five and end face six is ​​3.65-3.75mm.

[0008] Preferably, the outer surfaces of the two opposing inner chain plates are flat and form end face seven and end face eight respectively, with a distance of 3.65-3.75 mm between end face seven and end face eight.

[0009] Preferably, the outer ends of the two outer chain plate holes of the outer chain plate are provided with countersunk holes for accommodating the expansion deformation of the pin shaft during riveting, and the depth of the countersunk holes is 0.15mm.

[0010] Preferably, end face three and end face four are flat, concave surfaces formed by thinning the inner surface of the inner chain plate, and the lower edge of the head of the outer chain plate is provided with a chamfered surface.

[0011] Preferably, the chain body includes alternating inner and outer links. The inner link includes an inner plate and rollers. The edges of the two first link plate holes of the inner plate are coaxially provided with outwardly protruding annular ridges. The two inner plates are arranged opposite each other, and the annular ridges of the two inner plates are opposite to each other. Rollers are fitted together on the opposite annular ridges with clearance. The outer link includes an outer plate and a pin. The outer plate is provided with two second link plate holes. The two outer plates are arranged opposite each other, and the second link plate holes of the two outer plates are opposite to each other. The pin passes through the opposite second link plate holes. The two ends of the pin are respectively interference-fitted with the corresponding second link plate holes. The pin passes through the two first link plate holes of the adjacent inner link and is clearance-fitted with the first link plate holes.

[0012] The beneficial effects of this new type of bicycle chain are:

[0013] This invention provides a 12-speed bicycle chain, solving the current market's urgent need to develop entirely new 12-speed bicycle chains. Attached Figure Description

[0014] Figure 1 This is a top view of the structure of this novel invention;

[0015] Figure 2 This is a schematic diagram of the three-dimensional structure of the present invention. Figure 1 ;

[0016] Figure 3 This is a schematic diagram of the three-dimensional structure of the present invention. Figure 2 ;

[0017] Figure 4 This is a front view structural diagram of the present invention;

[0018] Figure 5 This is a schematic diagram of the assembly structure of this novel invention.

[0019] The markings in the diagram are as follows: 01, outer link plate; 02, inner link plate; 03, roller; 04, annular ridge; 05, pin; 06, pin end flush with the outer surface of the outer link plate; 1, end face one; 2, end face two; 3, pin end A; 4, pin end B; 5, first outer link plate; 6, second outer link plate; 7, first inner link plate; 8, second inner link plate; 9, roller end face A; 10, roller end face B; 11, end face three; 12, end face four; 13, end face five; 14, end face six; 15, chamfered surface; 16, countersunk hole; 17, end face seven; 18, end face eight. Detailed Implementation

[0020] 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.

[0021] The following embodiments can be understood as representing a part of the local structure or method of the present invention, or as a combination of embodiments explaining the broader structure or method of the present invention.

[0022] Example 1

[0023] A type of bicycle chain, such as Figures 1-5 As shown, a chain body is assembled from an inner chain plate 02, an outer chain plate 01, a pin 05, and rollers 03. The chain body includes alternating inner and outer chain links. The inner chain link includes an inner chain plate 02 and rollers 03. The two first chain plate hole edges of the inner chain plate 02 are coaxially provided with outwardly protruding annular ridges 04. The two inner chain plates 02 are arranged opposite each other, and the annular ridges 04 of the two inner chain plates are opposite each other. Rollers 03 are fitted together on the opposite annular ridges 04 with clearance. The outer chain link includes an outer chain plate 01 and a pin 05. The outer chain plate 01 is provided with two second chain plate holes. The two outer chain plates are arranged opposite each other, and the second chain plate holes of the two outer chain plates are opposite each other. Pins 05 pass through the opposite second chain plate holes. The two ends of the pin 05 are respectively interference-fitted with the corresponding second chain plate holes. The pin 05 passes through the two first chain plate holes of the adjacent inner chain link and is clearance-fitted with the first chain plate holes.

[0024] Example 2

[0025] Based on Embodiment 1, this embodiment discloses that: the outer surfaces of the two opposing outer chain plates 01 of the chain body respectively form end face 1 and end face 2, the end face 1 and end face 2 are flat end faces and the farthest distance between them is 5.1-5.15mm; the middle part of the inner surface of the two opposing inner chain plates 02 is a flat surface and respectively forms end face 3 11 and end face 4 12, the distance between end face 3 11 and end face 4 12 is 2.15-2.25mm.

[0026] Example 3

[0027] like Figures 1-5 As shown, the two end faces of the pin are flush with end face one and end face two, respectively, that is, the distance between the two end faces of the pin is 5.1-5.15mm (the distance between pin end A3 and pin end B4 is 5.1-5.15mm).

[0028] Example 4

[0029] like Figures 1-5 As shown, the inner surfaces of the middle parts of the two opposing outer chain plates are flat and form end face 5 13 and end face 6 14 respectively. The distance between end face 5 13 and end face 6 14 is 3.65-3.75mm.

[0030] Example 5

[0031] like Figure 3 As shown, the outer surfaces of the two opposing inner chain plates 02 are flat and form end face 7 17 and end face 8 18 respectively. The distance between end face 7 17 and end face 8 18 is 3.65-3.75mm.

[0032] Example 6

[0033] like Figures 3-5 As shown, the outer ends of the two outer chain plate holes of the outer chain plate 01 are provided with countersunk holes 16 for accommodating the expansion deformation of the pin 05 during riveting. The depth of the countersunk holes 16 is 0.15mm.

[0034] Example 7

[0035] like Figure 1 As shown, end face 3 11 and end face 4 12 are flat, concave surfaces formed by thinning the inner surface of the inner chain plate 02, and the lower edge of the head of the outer chain plate is provided with a chamfered surface 15.

[0036] The working principle of this new type:

[0037] 1. The chain body has flat end face 1 and end face 2: the maximum distance between end face 1 and end face 2 is 5.1-5.15mm. This design allows the freewheel to be manufactured and assembled with a smaller chainring pitch, resulting in a narrower freewheel assembly. Especially with various frames, a larger freewheel chainring pitch can easily cause rubbing between the rear derailleur assembly, freewheel assembly, and bicycle spokes. Furthermore, when the rider is riding at a high gear ratio and high cadence, a large chainring pitch can easily cause the rear derailleur assembly and chain to enter the spoke space, creating safety issues. However, if the freewheel chainring pitch is designed too small, it will cause rubbing between the wide chain and adjacent chainrings. Even if the lower edge of the outer link plate is designed with a chamfered surface 15, it cannot fundamentally solve the problem. End faces 5 and 6 will also rubbing against adjacent chainrings. Therefore, we designed the maximum distance between end face 1 and end face 2 to be 5.1-5.15mm. This allows the freewheel chainring pitch to be smaller, leaving enough space between the bicycle rear derailleur assembly and spokes to meet safety requirements.

[0038] 2. As the distance between end face 1 and end face 2 becomes 5.1-5.15mm, the design of the chain itself must be modified, and the distance between the two end faces of the pin is also designed to be 5.1-5.15mm. Consequently, the distance between roller end face A9 and roller end face B10 is also adjusted accordingly. The middle of the inner surface of the two inner chain plates 02 is flat and forms end face 11 and end face 12 respectively. The distance between end face 11 and end face 12 is 2.15-2.25mm. The reason for this design is to ensure that the chain will not be unable to operate with the original derailleur due to the change in the distance between end face 1 and end face 2. Because the derailleur manufacturer has mature derailleur kits, it will not modify the parameters of the rear derailleur due to the change in the chain. Therefore, it can be ensured that the tension wheel and guide wheel of the rear derailleur can freely pass through the space between the first inner chain plate 7 and the second inner chain plate 8, even if the entire transmission system is reversed. Meanwhile, the inner surfaces of the middle of the two opposing outer chain plates are flat and form end face 5 13 and end face 6 14 respectively. The distance between end face 5 13 and end face 6 14 is 3.65-3.75mm. This design is intended to allow the front freewheel in the bicycle's front crank assembly to pass freely through end face 5 13 and end face 6 14, and the same applies when reversing. The outer surfaces of the two opposing inner chain plates 02 are flat and form end face 7 17 and end face 8 18 respectively.

[0039] 3. Based on the above design, this new type of bicycle chain provides a 12-speed bicycle chain, which solves the problem of the urgent need to develop a brand-new 12-speed bicycle chain in the current market.

Claims

1. A bicycle chain, characterized by: The chain body comprises an inner chain plate, an outer chain plate, pins, and rollers. The outer surfaces of the two opposing outer chain plates of the chain body form end face one and end face two, respectively. End face one and end face two are flat end faces, and the maximum distance between them is 5.1-5.15mm. The middle part of the inner surfaces of the two opposing inner chain plates is a flat surface, which forms end face three and end face four, respectively. The distance between end face three and end face four is 2.15-2.25mm.

2. A bicycle chain as described in claim 1, characterized in that: The two end faces of the pin are flush with end face one and end face two, respectively, that is, the distance between the two end faces of the pin is 5.1-5.15mm.

3. A bicycle chain as described in claim 2, characterized in that: the inner surfaces of the middle parts of the two opposing outer chain plates are flat surfaces and respectively form end face five and end face six, wherein the distance between end face five and end face six is ​​3.65-3.75mm.

4. A bicycle chain as described in claim 3, characterized in that: The outer surfaces of the two opposing inner chain plates are flat and form end face seven and end face eight respectively. The distance between end face seven and end face eight is 3.65-3.75mm.

5. A bicycle chain as described in claim 4, characterized in that: The outer ends of the two outer chain plate holes of the outer chain plate are provided with countersunk holes for accommodating the expansion deformation of the pin shaft during riveting. The depth of the countersunk holes is 0.15mm.

6. A bicycle chain as described in claim 5, characterized in that: The end face three and end face four are flat, concave surfaces formed by thinning the inner surface of the inner chain plate, and the lower edge of the head of the outer chain plate is provided with a chamfered surface.

7. A bicycle chain as described in claim 6, characterized in that: The chain body includes alternating inner and outer links. Each inner link includes an inner plate and rollers. The edges of the two first chain plate holes of the inner plate are coaxially provided with outwardly protruding annular ridges. The two inner plates are arranged opposite each other, and the annular ridges of the two inner plates are aligned one-to-one. Rollers are fitted together on the aligned annular ridges with a clearance fit. Each outer link includes an outer plate and a pin. The outer plate has two second chain plate holes. The two outer plates are arranged opposite each other, and the second chain plate holes of the two outer plates are aligned one-to-one. A pin passes through each aligned second chain plate hole, and both ends of the pin are interference-fitted with the corresponding second chain plate holes. The pin passes through the two first chain plate holes of adjacent inner links and has a clearance fit with the first chain plate holes.

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