13-speed bicycle chain

Abstract

A 13-speed bicycle chain relates to the technical field of chain transmission and comprises inner chain plates, outer chain plates, rollers and pin shafts, the inner chain plates and the rollers form inner chain links, the outer chain plates and the pin shafts form outer chain links, and the outer chain links and the inner chain links are alternately connected to form a chain body of the bicycle chain. The 13-speed bicycle chain is provided on the basis of the requirement that a 13-speed bicycle chain needs to be designed urgently at present, practice proves that the chain body has enough structural strength and is smooth in operation, the structural size design of all parts is reasonable, noise is low, and the use requirement of the 13-speed bicycle chain is fully met.

Description

Technical Field

[0001] This invention relates to the field of chain drive technology, specifically to a 13-speed 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. In the second half of 2004, CP took the lead in launching a 13-speed derailleur groupset, which triggered a new round of derailleur revolution. However, as the gap between the freewheels decreased, the original chain could no longer meet the matching relationship between the existing freewheels, and a brand-new bicycle chain needed to be developed. Utility Model Content

[0003] This invention discloses a 13-speed bicycle chain, addressing the problem in the prior art that "a completely new 13-speed bicycle chain needs to be developed".

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

[0005] A 13-speed bicycle chain includes an inner link plate, an outer link plate, rollers, and pins. The inner link plate and rollers form inner link segments, and the outer link plate and pins form outer link segments. The outer link segments and inner link segments are alternately connected to form the chain body of the bicycle chain. The inner link plate includes a first inner link plate and a second inner link plate. The first and second inner link plates have the same structure, except that the front edges of the two first link plate holes of the first inner link plate have forward-protruding annular protrusions, and the rear edges of the two first link plate holes of the second inner link plate have rearward-protruding annular protrusions. The first inner link plate and the second inner link plate are arranged opposite each other, and the two annular protrusions of each plate are opposite each other. The roller is sleeved on the outside of the two opposite annular protrusions and is in clearance fit with the annular protrusions to form an inner link. The outer link includes two opposite outer link plates. The outer link plates are provided with two second link plate holes. The second link plate holes of the two outer link plates are opposite each other. A pin is connected between the opposite second link plate holes. The pin passes through the first link plate hole of the adjacent inner link and is in clearance fit with the first link plate hole. The two ends of the pin are in interference fit with the second link plate hole.

[0006] Preferably, the left and right sides of the inner chain plate are symmetrically arranged about the longitudinal central axis of the middle of the inner chain plate. The longitudinal and transverse axes of the two first chain plate holes divide the first chain plate holes into four parts. The left and right edges of the inner chain plate are respectively divided into two 1 / 4 arc structures by the transverse axis. The two 1 / 4 arc structures form a semi-circular arc structure one coaxial with the first chain plate hole. A transition structure one is connected between the top ends of the two semi-circular arc structures one. The transition structure one is a downwardly concave arc structure one. A transition structure two is connected between the bottom ends of the two semi-circular arc structures one. The transition structure two is formed by connecting two arc structures two that are symmetrical about the longitudinal central axis. The longitudinal central axis intersects the arc structure one at intersection point one, and the longitudinal central axis intersects the transition structure two at intersection point two. The distance between intersection point one and intersection point two is 6.25-6.7mm.

[0007] Preferably, the second arc structure consists of an arc A with a diameter of 16.5-17mm plus an arc B with a diameter of 8.48-8.6mm. The starting point of arc A is intersection point two, and the ending point of arc A intersects the starting point of arc B at intersection point three. The direction of arc A at intersection point three is tangent to arc B. The ending point of arc B intersects the bottom end of the first semi-circular arc structure.

[0008] Preferably, the inner chain plate has a chamfer structure one and a chamfer structure two on its left and right ends and upper and lower ends, respectively. The chamfer structure one has an angle of 45-48 degrees and the chamfer structure two has an angle of 32-36 degrees.

[0009] Preferably, the inner chain plate surface between the first transition structure and the second transition structure is recessed inward to form a thinning area, and the left and right edges of the thinning area form an arc-shaped facade coaxial with the hole of the first chain plate. The arc-shaped facade is disengaged from the bicycle freewheel when the chain body is in use.

[0010] Preferably, the thickness of the thinning zone is 0.55-0.58 mm, the outer diameter of the annular protrusion is 4.95-5.05 mm, the distance H between the top of the annular protrusion and the outer surface of the inner chain plate away from the annular protrusion is 1.45-1.55 mm, the height of the annular protrusion is 0.6-0.7 mm, and the transverse axes of the two first chain plate holes intersect the arcuate facade on the same side at intersection points four and five, respectively, with the distance between intersection points four and five being 4.25-4.35 mm.

[0011] Preferably, the outer chain plate is symmetrically arranged about the longitudinal dividing line in the middle. The two second chain plate holes of the outer chain plate are divided into four parts by the transverse axis and the longitudinal axis. The upper left and upper right ends of the outer chain plate are 1 / 4 arc-shaped structures with a diameter of 8.48-8.6mm. The lower left and lower right ends of the outer chain plate are symmetrically arranged about the transverse axis with the upper left and upper right ends of the outer chain plate, respectively. The difference is that the lower left and lower right edges of the outer chain plate are respectively provided with chamfered structures three extending inward. The angle of the chamfered structure three is 33°-36°. The two 1 / 4 arc-shaped structures at the left and right ends of the outer chain plate together form a semi-circular arc structure two coaxial with the second chain plate hole.

[0012] Preferably, the top ends of the semi-circular arc structures two at the left and right ends of the outer chain plate are connected by an inwardly concave transition structure three, and the bottom ends are connected by an inwardly concave transition structure four. The transition structure four is formed by connecting two arc structures three that are symmetrical about the longitudinal midline. The longitudinal midline intersects the transition structure three at intersection point six and the transition structure four at intersection point seven. The arc structure three includes arc C and arc D. Arc C starts at intersection point seven and its end intersects the starting point of arc D. The end of arc D intersects the bottom end of the corresponding semi-circular arc structure two. The diameter of arc C is 17-18 mm, and the diameter of arc D is 8.48-8.6 mm. The end of arc C is tangent to the starting point of arc D.

[0013] Preferably, the transition structure three is an arc-shaped end face structure composed of one or more arc segments. The transition structure three and the transition structure four are provided with a chamfer structure four on the opposite side of the chamfer structure three. The degree of the chamfer structure four is 45°. The longitudinal axis intersects the top of the outer chain plate at intersection point eight and the bottom of the outer chain plate at intersection point nine. The distance between intersection point eight and intersection point nine on the same side is 8.48-8.6mm.

[0014] Preferably, the two ends of the chamfered structure four form chamfered structure five, the degree of chamfered structure five is 33-36 degrees, and the length of chamfered structure four in the transverse axis direction is 6.9-7.2mm.

[0015] Preferably, the height of the pin is 4.9-4.95 mm.

[0016] The beneficial effects of this new 13-speed bicycle chain are:

[0017] Based on the current urgent need for the design of 13-speed bicycle chains, this new invention provides a 13-speed bicycle chain. Practice has proven that the chain body has sufficient structural strength, runs smoothly, the structural dimensions of each component are reasonably designed, and the noise is low, fully meeting the usage requirements of a 13-speed chain. Attached Figure Description

[0018] 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.

[0019] Figure 1 A schematic diagram of the chain body structure of this novel invention;

[0020] Figure 2 A front view structural diagram of the novel inner chain plate;

[0021] Figure 3 A top view of the structure of this novel inner chain plate;

[0022] Figure 4 A front view structural diagram of the new type of outer chain plate;

[0023] Figure 5 A top view of the structure of this novel outer chain plate.

[0024] 01. Inner Link Plate; 02. Outer Link Plate; 03. Roller; 04. Pin; 05. Annular Protrusion; 1. Longitudinal Axis A; 2. Longitudinal Center Axis; 3. Center Axis B; 4. Transverse Axis; 5. 1 / 4 Circular Arc Structure A; 6. 1 / 4 Circular Arc Structure B; 7. Arc Structure Two; 8. Arc-shaped Facade; 9. Chamfer Structure One; 10. Chamfer Structure Two; 11. Transition Structure One; 12. Thinning Area; 13. Back Side of Inner Link Plate; 14. Top End Face of Annular Protrusion Rib; 15. Bottom End Face of Annular Protrusion Rib; 16. Intersection Point Four; 17. Intersection Point Five; 18. Intersection of Longitudinal Axis and Upper End of Inner Link Plate; 19. Intersection of Longitudinal Axis and Lower End of Inner Link Plate; 20. Annular Protrusion Rib; 21. Intersection Point One; 22. Intersection Point Two; 23. Longitudinal Centerline; 24. Longitudinal Axis; 25. Transverse Axis; 26. 1. Outline of the upper right end of the outer link plate; 27. Outline of the lower right edge of the outer link plate; 28. Outline of the upper edge of chamfered structure three; 29. ​​Arc structure three; 30. Transition structure three; 31. Intersection point ten; 32. Intersection point 11; 33. Chamfered structure three; 34. Intersection point eight; 35. Intersection point nine; 36. Chamfered structure five; 37 and 38. Left and right ends of transition structure three; 39. Thinning position; 40. Back side of the outer link plate; 41. Outer end face of the countersunk hole; 42. Front end face of the outer link plate; 43 and 44. Left and right ends of the outer link plate; 45. Chamfered structure four; 46. Countersunk hole; 47. Top of the pin; 48. Bottom of the pin; 49. Top of the outer link; 50. Bottom of the outer link; 51 and 52. Two opposite end faces of the outer link plate; 53 and 54. Two opposite end faces of the inner link plate; 55. First link plate hole. Detailed Implementation

[0025] 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.

[0026] 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.

[0027] Example 1

[0028] A 13-speed bicycle chain, such as Figure 1 As shown, it includes an inner link plate 01, an outer link plate 02, a roller 03, and a pin 04. The inner link plate 01 and the roller 03 constitute an inner link, and the outer link plate and the pin constitute an outer link. The outer link and the inner link are alternately connected to form the chain body of the bicycle chain.

[0029] like Figure 1 As shown, the inner chain plate 01 includes a first inner chain plate and a second inner chain plate. The first inner chain plate and the second inner chain plate have the same structure, the difference being that: the front end edge of the two first chain plate holes of the first inner chain plate is provided with a forward-protruding annular protrusion 05, and the rear end edge of the two first chain plate holes of the second inner chain plate is provided with a rearward-protruding annular protrusion 05. The first inner chain plate and the second inner chain plate are arranged opposite each other and their respective two annular protrusions 05 are opposite each other. The roller 03 is sleeved on the outside of the two opposite annular protrusions 05 and is in clearance fit with the annular protrusions 05 to form an inner chain link.

[0030] like Figure 1 As shown, the outer link includes two oppositely arranged outer link plates 02. Each outer link plate 02 has two second link plate holes. The second link plate holes of the two outer link plates are opposite to each other. A pin 04 is connected between the opposite second link plate holes. The pin 04 passes through the first link plate hole of the adjacent inner link and is clearance-fitted with the first link plate hole. Both ends of the pin 04 are interference-fitted with the second link plate hole.

[0031] Example 2

[0032] like Figure 2 , 3As shown, the left and right parts of the inner chain plate 01 are symmetrically arranged about the longitudinal central axis 2 of the middle part of the inner chain plate. The longitudinal axis (1 / 3) and the transverse axis 4 of the two first chain plate holes divide the first chain plate holes into four parts. The left and right edges of the inner chain plate 01 are respectively divided by the transverse axis 4 into two 1 / 4 arc structures (5 / 6) with a diameter of 8.5mm. The two 1 / 4 arc structures form a semi-circular arc structure one coaxial with the first chain plate hole. A transition structure one 11 is connected between the top ends of the two semi-circular arc structures one. The transition structure one 11 is a downwardly concave arc structure one. A transition structure two is connected between the bottom ends of the two semi-circular arc structures one. The transition structure two is formed by connecting two arc structures two 7 that are symmetrical about the longitudinal central axis 2. The longitudinal central axis 2 intersects the arc structure one at intersection point one 21, and the longitudinal central axis 2 intersects the transition structure two at intersection point two 22. The distance between intersection point one 21 and intersection point two 22 is 6.25-6.7mm.

[0033] like Figure 2 , 3 As shown, the arc structure 2 7 consists of an arc A with a diameter of 16.5-17mm plus an arc B with a diameter of 8.48-8.6mm. The starting point of arc A is intersection point 22, and the ending point of arc A intersects the starting point of arc B at intersection point 3. The direction of arc A at intersection point 3 is tangent to arc B. The ending point of arc B intersects the bottom end of the semi-circular arc structure 1.

[0034] like Figure 2 , 3 As shown, the left and right ends and the upper and lower ends of the inner chain plate 01 are respectively provided with chamfer structure 9 and chamfer structure 10. The degree of chamfer structure 9 is 45-48 degrees, and the degree of chamfer structure 10 is 32-26 degrees.

[0035] like Figure 2 , 3 As shown, the inner chain plate surface between the transition structure 11 and the transition structure 2 is recessed inward to form a thinning area 12. The left and right edges of the thinning area 12 form an arc-shaped facade 8 coaxial with the hole of the first chain plate. The arc-shaped facade 8 is disengaged from the bicycle freewheel when the chain body is in use.

[0036] like Figure 2 , 3As shown, the thickness of the thinning zone 12 is 0.55-0.58mm, the outer diameter of the annular protrusion 05 is 4.95-5.05mm, the distance H between the top of the annular protrusion 05 and the outer surface of the inner chain plate 01 away from the annular protrusion is 1.45-1.55mm, the height of the annular protrusion 05 is 0.6-0.7mm, and the transverse axes of the two first chain plate holes intersect the arc-shaped facade on the same side at intersection points 4.16 and 5.17 respectively. The distance between intersection points 4.16 and 5.17 is 4.25-4.35mm.

[0037] In this embodiment, unlike the speed-connected design, the transition structure 11 is not a straight line or an upward protrusion, but rather an inwardly concave arc structure. This design aims to increase the torsional strength of the inner chain plate, significantly improving its resistance to deformation during high-intensity shifting. The reason for not designing it as a straight line or an upward protrusion is that such a design would interfere with the upper guide wheel of the derailleur, causing significant noise. In existing technologies, to solve this problem, the guide wheel must be designed to be very narrow to ensure no extra noise is generated, which greatly reduces the strength of the guide wheel. This invention solves the above problems by improving the inner chain plate structure. Through experimental simulation and theoretical calculations, the new inner chain plate, designed as described above, can fully guarantee structural strength and meet usage requirements. Through the improvement of the inner chain plate structural dimensions in this embodiment, the inner chain plate can meet the requirements of a 13-speed bicycle chain and improve performance.

[0038] Example 3

[0039] like Figure 3 , 4 As shown, the outer chain plate 02 is symmetrically arranged about the longitudinal dividing line 23 in the middle. The two second chain plate holes of the outer chain plate 02 are divided into four parts by the transverse axis 25 and the longitudinal axis 24. The upper left and upper right ends of the outer chain plate 02 are 1 / 4 arc-shaped structures with a diameter of 8.48-8.6mm. The lower left and lower right ends of the outer chain plate 02 are symmetrically arranged about the transverse axis 25 with the upper left and upper right ends of the outer chain plate, respectively. The difference is that the lower left and lower right edges of the outer chain plate are respectively provided with chamfered structures 33 extending inward. The angle of the chamfered structure 33 is 33°-36° (to ensure that the chain does not contact the previous flywheel disc as much as possible when there are different flywheel discs, which will bring very little noise, almost no extra noise, and the chain runs more stably). The two 1 / 4 arc-shaped structures at the left and right ends of the outer chain plate 02 together form a semi-circular arc structure 2 coaxial with the second chain plate hole.

[0040] like Figure 4 , 5As shown, the top ends of the semi-circular arc structures 2 at the left and right ends of the outer chain plate 02 are connected by an inwardly concave transition structure 30, and the bottom ends are connected by an inwardly concave transition structure 4. The transition structure 4 is formed by connecting two arc structures 3 29 that are symmetrical about the longitudinal center line 23. The longitudinal center line 23 intersects the transition structure 3 at intersection point 6 and the transition structure 4 at intersection point 7. The arc structure 3 29 includes arc C and arc D. Arc C starts at intersection point 7 and its end intersects the starting point of arc D. The end of arc D intersects the bottom end of the corresponding semi-circular arc structure 2. The diameter of arc C is 17-18mm, and the diameter of arc D is 8.48-8.6mm. The end of arc C is tangent to the starting point of arc D. The purpose of this design is to ensure that the tips of the flywheel teeth do not interfere when entering the chain space, thereby avoiding unnecessary noise and improving the user's riding experience.

[0041] like Figure 4 , 5 As shown, the transition structure 30 is an arc-shaped end face structure composed of one or more arcs. The transition structure 30 and the transition structure 4 are provided with a chamfer structure 45 on the opposite side of the chamfer structure 33. The chamfer structure 45 has an angle of 45°. The longitudinal axis 24 intersects the top of the outer chain plate 02 at intersection point 8 34 and the bottom of the outer chain plate 02 at intersection point 9 35. The distance between intersection point 8 34 and intersection point 9 35 on the same side is 8.48-8.6mm to ensure structural strength to adapt to road conditions.

[0042] like Figure 5 As shown, the two ends of the chamfered structure 4 form chamfered structure 5 36, the degree of chamfered structure 5 36 is 33-36 degrees, and the length of chamfered structure 45 in the transverse axis direction is 6.9-7.2mm.

[0043] like Figure 1 As shown, the height of the pin 04 is 4.9-4.95mm.

[0044] In this embodiment, improvements to the structure and size of the outer chain plate enable it to be used in 13-speed bicycle drives, resulting in a significant performance improvement.

[0045] Based on the current urgent need for the design of 13-speed bicycle chains, this new invention provides a 13-speed bicycle chain. Practice has proven that the chain body has sufficient structural strength, runs smoothly, the structural dimensions of each component are reasonably designed, and the noise is low, fully meeting the usage requirements of a 13-speed chain.

Claims

1. A 13-speed bicycle chain, characterized in that: The bicycle chain includes an inner link plate, an outer link plate, rollers, and pins. The inner link plate and rollers form an inner link, and the outer link plate and pins form an outer link. The outer and inner link plates are alternately connected to form the chain body. The inner link plate includes a first inner link plate and a second inner link plate. The first and second inner link plates have the same structure, but the difference is that the front edge of the two first link plate holes of the first inner link plate has a forward-protruding annular protrusion, and the rear edge of the two first link plate holes of the second inner link plate has a rearward-protruding annular protrusion. The second inner chain plates are arranged opposite each other, and the two annular protrusions of each plate are opposite each other. The rollers are sleeved on the outside of the two opposite annular protrusions and are in clearance fit with the annular protrusions to form an inner chain link. The outer chain link includes two opposite outer chain plates. The outer chain plates are provided with two second chain plate holes. The second chain plate holes of the two outer chain plates are opposite each other. A pin is connected between the opposite second chain plate holes. The pin passes through the first chain plate hole of the adjacent inner chain link and is in clearance fit with the first chain plate hole. The two ends of the pin are in interference fit with the second chain plate hole.

2. The 13-speed bicycle chain as described in claim 1, characterized in that: The left and right sides of the inner chain plate are symmetrically arranged about the longitudinal central axis of the middle of the inner chain plate. The longitudinal and transverse axes of the two first chain plate holes divide the first chain plate holes into four parts. The left and right edges of the inner chain plate are respectively divided into two 1 / 4 arc structures by the transverse axis. The two 1 / 4 arc structures form a semi-circular arc structure one coaxial with the first chain plate hole. A transition structure one is connected between the top ends of the two semi-circular arc structures one. The transition structure one is a downwardly concave arc structure one. A transition structure two is connected between the bottom ends of the two semi-circular arc structures one. The transition structure two is formed by connecting two arc structures two that are symmetrical about the longitudinal central axis. The longitudinal central axis intersects the arc structure one at intersection point one, and the longitudinal central axis intersects the transition structure two at intersection point two. The distance between intersection point one and intersection point two is 6.25-6.7mm.

3. A 13-speed bicycle chain as described in claim 2, characterized in that: The second arc structure consists of an arc A with a diameter of 16.5-17mm plus an arc B with a diameter of 8.48-8.6mm. The starting point of arc A is intersection point two, and the ending point of arc A intersects the starting point of arc B at intersection point three. The direction of arc A at intersection point three is tangent to arc B. The ending point of arc B intersects the bottom end of the first semi-circular arc structure.

4. A 13-speed bicycle chain as described in claim 3, characterized in that: The inner chain plate has chamfer structure one and chamfer structure two on its left and right ends and top and bottom ends, respectively. The chamfer structure one has an angle of 45-48 degrees and the chamfer structure two has an angle of 32-36 degrees.

5. A 13-speed bicycle chain as described in claim 4, characterized in that: The inner chain plate surface between the first transition structure and the second transition structure is recessed inward to form a thinning area. The left and right edges of the thinning area form an arc-shaped facade coaxial with the hole of the first chain plate. The arc-shaped facade is disengaged from the bicycle freewheel when the chain body is in use.

6. A 13-speed bicycle chain as described in claim 5, characterized in that: The thickness of the thinning zone is 0.55-0.58 mm, the outer diameter of the annular protrusion is 4.95-5.05 mm, the distance H between the top of the annular protrusion and the outer surface of the inner chain plate away from the annular protrusion is 1.45-1.55 mm, the height of the annular protrusion is 0.6-0.7 mm, and the transverse axes of the two first chain plate holes intersect the arc-shaped facade on the same side at intersection points four and five, respectively, with the distance between intersection points four and five being 4.25-4.35 mm.

7. A 13-speed bicycle chain as described in claim 6, characterized in that: The outer chain plate is symmetrically arranged about the longitudinal dividing line in the middle. The two second chain plate holes of the outer chain plate are divided into four parts by the transverse axis and the longitudinal axis. The upper left and upper right ends of the outer chain plate are 1 / 4 arc-shaped structures with a diameter of 8.48-8.6mm. The lower left and lower right ends of the outer chain plate are symmetrically arranged about the transverse axis with the upper left and upper right ends of the outer chain plate, respectively. The difference is that the lower left and lower right edges of the outer chain plate are respectively provided with chamfered structure three extending inward. The angle of chamfered structure three is 33°-36°. The two 1 / 4 arc-shaped structures at the left and right ends of the outer chain plate together form a semi-circular arc structure two coaxial with the second chain plate hole.

8. A 13-speed bicycle chain as described in claim 7, characterized in that: The top ends of the semi-circular arc structures two on the left and right sides of the outer chain plate are connected by an inwardly concave transition structure three, and the bottom ends are connected by an inwardly concave transition structure four. The transition structure four is formed by connecting two arc structures three that are symmetrical about the longitudinal midline. The longitudinal midline intersects the transition structure three at intersection point six and the transition structure four at intersection point seven. The arc structure three includes arc C and arc D. Arc C starts at intersection point seven and ends at the starting point of arc D. The end of arc D intersects the bottom end of the corresponding semi-circular arc structure two. The diameter of arc C is 17-18mm, and the diameter of arc D is 8.48-8.6mm. The end of arc C is tangent to the starting point of arc D.

9. A 13-speed bicycle chain as described in claim 8, characterized in that: The transition structure three is an arc-shaped end face structure composed of one or more arcs. The transition structure three and the transition structure four are provided with a chamfer structure four on the opposite side of the chamfer structure three. The degree of the chamfer structure four is 45°. The longitudinal axis intersects the top of the outer chain plate at intersection point eight and the bottom of the outer chain plate at intersection point nine. The distance between intersection point eight and intersection point nine on the same side is 8.48-8.6mm.

10. A 13-speed bicycle chain as described in claim 9, characterized in that: The chamfered structure four has chamfered structure five at both ends. The degree of chamfered structure five is 33-36 degrees. The length of chamfered structure four in the transverse axis direction is 6.9-7.2mm. The height of the pin is 4.9-4.95mm.

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