sprocket carrier

Abstract

A sprocket carrier capable of reducing the volume in a state where a multi-stage rear sprocket assembly is detached. A sprocket carrier (55) is used in a multi-stage rear sprocket assembly (27) including a plurality of linked sprockets (31) and at least one separate sprocket (33). The sprocket carrier (55) has a base body (61). The base body (61) is configured to deform between a flat state and an engaged state. In the flat state, the base body (61) is flat. In the engaged state, in a state where the sprocket carrier (55) is engaged with the multi-stage rear sprocket assembly (27), the base body (61) deforms in at least an axial direction of the multi-stage rear sprocket assembly (27) with respect to a rotational center axis (X).

Description

TECHNICAL FIELD

[0001] The present application relates to a sprocket carrier. BACKGROUND

[0002] In the related art, a sprocket carrier has been disclosed (see Patent Document 1). The sprocket carrier is configured to maintain the circumferential phase of each sprocket of a multi-stage rear sprocket assembly. For example, the sprocket carrier is composed of a multi-stage ring portion. The multi-stage ring portion covers at least two sprockets. The multi-stage ring portion is a synthetic resin product.

[0003] PRIOR ART DOCUMENTS

[0004] PATENT DOCUMENTS

[0005] Patent Document 1: Japanese Patent Application Publication No. 2017-35926 SUMMARY

[0006] PROBLEMS TO BE SOLVED BY THE INVENTION

[0007] The conventional sprocket carrier is composed of a multi-stage ring portion made of synthetic resin. In a case where the sprocket carrier is detached from the multi-stage rear sprocket assembly, the appearance of the multi-stage ring portion is maintained as a three-dimensional shape. Therefore, there is a problem that the space at the time of storage of the sprocket carrier and the space at the time of transportation of the sprocket carrier increase.

[0008] Further, in the conventional sprocket carrier, the multi-stage ring portion is formed of synthetic resin, so the molding is complicated. Therefore, there is a possibility that the amount of use of synthetic resin such as plastic increases, and the weight at the time of disposal of the sprocket carrier increases.

[0009] An object of the present application is to provide a sprocket carrier capable of reducing the volume in a state where the sprocket carrier is detached from a multi-stage rear sprocket assembly. Another object of the present application is to provide a sprocket carrier capable of reducing the disposal weight.

[0010] TECHNICAL SOLUTION FOR SOLVING THE PROBLEM

[0011] Regarding the first aspect of the present application, the sprocket carrier is used in a multi-stage rear sprocket assembly including a plurality of linked sprockets and at least one separated sprocket. The sprocket carrier has a base body configured to deform between a flat state and an engaged state.

[0012] In the flat state, the base body is flat. In the engaged state, in a state where the sprocket carrier is engaged with the multi-stage rear sprocket assembly, the base body is deformed in at least an axial direction with respect to a rotational center axis of the multi-stage rear sprocket assembly.

[0013] The base body includes a center body, a first tooth engagement body, a second tooth engagement body, a third tooth engagement body, and a fourth tooth engagement body. The center body is configured to contact a center portion of the multi-stage rear sprocket assembly.

[0014] The first tooth engaging body extends from the center body in a first direction. The first tooth engaging body has a first tooth engaging portion. The first tooth engaging portion is configured to engage with at least one first sprocket tooth of the plurality of sprockets.

[0015] The second tooth engaging body extends from the center body in a second direction. The second tooth engaging body has a second tooth engaging portion. The second tooth engaging portion is configured to engage with the plurality of sprockets.

[0016] The third tooth engaging body extends from the center body in a third direction. The third tooth engaging body has a third tooth engaging portion. The third tooth engaging portion is configured to engage with at least one second sprocket tooth of the plurality of sprockets.

[0017] The fourth tooth engaging body extends from the center body in a fourth direction. The fourth tooth engaging body has a fourth tooth engaging portion. The fourth tooth engaging portion is configured to engage with the plurality of sprockets. The first direction, the second direction, the third direction, and the fourth direction are different from each other.

[0018] In the sprocket carrier according to the first aspect, the base body is deformed between a flat state and an engaged state. By mounting the base body in the engaged state to the plurality of sprockets, the sprocket carrier can hold the circumferential phases of the sprockets of the plurality of sprockets. Also, in a state where the base body is detached from the plurality of sprockets, by deforming the base body from the engaged state to the flat state, the volume of the sprocket carrier can be reduced.

[0019] According to the second aspect of the present application, the sprocket carrier according to the first aspect is configured such that the center body has a tool receiving port.

[0020] In the sprocket carrier according to the second aspect, in a state where the sprocket carrier holds the circumferential phases of the sprockets of the plurality of sprockets, by inserting a tool into the tool receiving port, the plurality of sprockets can be easily mounted to the rear hub.

[0021] According to the third aspect of the present application, the sprocket carrier according to the first or second aspect is configured as follows. The second tooth engaging portion of the second tooth engaging body is configured to engage with at least one first split sprocket tooth of the at least one split sprocket. The fourth tooth engaging portion of the fourth tooth engaging body is configured to engage with at least one second split sprocket tooth of the at least one split sprocket.

[0022] The sprocket carrier according to the third aspect can reliably hold the circumferential phases of the sprockets of the plurality of sprockets.

[0023] According to the fourth aspect of the present application, the sprocket carrier according to any one of the first to third aspects is configured such that the first tooth engaging body has a first adjustment piece. The first adjustment piece is configured to be manually operated.

[0024] In the sprocket carrier according to the fourth aspect, the sprocket carrier can be easily detached from the multi-stage rear sprocket assembly by manually operating the first adjustment piece.

[0025] In the sprocket carrier according to the fifth aspect, the sprocket carrier according to the fourth aspect is configured such that the third tooth engaging body has a second adjustment piece. The second adjustment piece is configured to be manually operated.

[0026] In the sprocket carrier according to the fifth aspect, the sprocket carrier can be easily detached from the multi-stage rear sprocket assembly by manually operating the second adjustment piece.

[0027] In the sprocket carrier according to the sixth aspect, the sprocket carrier according to any one of the first to fifth aspects is configured such that the first direction is opposite to the third direction with respect to the center body.

[0028] In the sprocket carrier according to the sixth aspect, the circumferential phases of the sprockets of the multi-stage rear sprocket assembly can be reliably maintained.

[0029] In the sprocket carrier according to the seventh aspect, the sprocket carrier according to the third aspect is configured such that the second tooth engaging body has a fifth tooth engaging portion. The fifth tooth engaging portion is configured to engage with at least one third split sprocket tooth of the at least one split sprocket.

[0030] In the sprocket carrier according to the seventh aspect, the circumferential phases of the sprockets of the multi-stage rear sprocket assembly can be reliably maintained.

[0031] In the sprocket carrier according to the eighth aspect, the sprocket carrier according to the seventh aspect is configured such that the fourth tooth engaging body has a sixth tooth engaging portion. The sixth tooth engaging portion is configured to engage with at least one fourth split sprocket tooth of the at least one split sprocket.

[0032] In the sprocket carrier according to the eighth aspect, the circumferential phases of the sprockets of the multi-stage rear sprocket assembly can be reliably maintained.

[0033] In the sprocket carrier according to the ninth aspect, the sprocket carrier according to any one of the first to eighth aspects is configured such that the second direction is opposite to the fourth direction with respect to the center body.

[0034] In the sprocket carrier according to the ninth aspect, the circumferential phases of the sprockets of the multi-stage rear sprocket assembly can be reliably maintained.

[0035] In the sprocket carrier according to the tenth aspect, the sprocket carrier according to any one of the first to ninth aspects is configured such that the base body includes a position mark. The position mark is configured to be aligned with a positioning spline. The positioning spline is provided to the plurality of link sprockets and the at least one split sprocket.

[0036] In the sprocket carrier according to the tenth aspect, by aligning the position mark with the positioning spline, the sprocket carrier can correctly maintain the circumferential phases of the sprockets of the multi-stage rear sprocket assembly.

[0037] According to the eleventh aspect of the present application, the sprocket carrier according to any one of the first to tenth aspects is configured such that the base has a weakened portion. The weakened portion is configured to facilitate removal of the sprocket carrier from the multi-stage rear sprocket assembly.

[0038] In the sprocket carrier according to the eleventh aspect, the sprocket carrier can be easily removed from the multi-stage rear sprocket assembly by the weakened portion.

[0039] According to the twelfth aspect of the present application, the sprocket carrier according to the eleventh aspect is configured such that a hole is provided in the weakened portion.

[0040] In the sprocket carrier according to the twelfth aspect, the sprocket carrier can be more easily removed from the multi-stage rear sprocket assembly by the hole in the weakened portion.

[0041] According to the thirteenth aspect of the present application, the sprocket carrier according to the eleventh or twelfth aspect is configured such that the weakened portion is provided in the center body.

[0042] In the sprocket carrier according to the thirteenth aspect, the sprocket carrier can be more easily removed from the multi-stage rear sprocket assembly by providing the weakened portion in the center body.

[0043] According to the fourteenth aspect of the present application, the sprocket carrier according to any one of the first to thirteenth aspects is configured such that the base is formed of a non-metallic material.

[0044] In the sprocket carrier according to the fourteenth aspect, the base is formed of a non-metallic material, so the sprocket carrier can be easily disposed of.

[0045] According to the fifteenth aspect of the present application, the sprocket carrier according to the fourteenth aspect is configured such that the base is formed of paper.

[0046] In the sprocket carrier according to the fifteenth aspect, the base is formed of paper, so the weight of the sprocket carrier at the time of disposal can be reduced. That is, improvement of environmental problems relating to waste can be facilitated.

[0047] According to the sixteenth aspect of the present application, the sprocket carrier according to any one of the first to fifteenth aspects is configured such that the base is formed of a biodegradable material.

[0048] In the sprocket carrier according to the sixteenth aspect, the base is formed of a biodegradable material, so the weight of the sprocket carrier at the time of disposal can be reduced. That is, improvement of environmental problems relating to waste can be facilitated.

[0049] Effects of the Invention

[0050] According to the present application, the sprocket carrier can maintain the circumferential phase of each sprocket of the multi-stage rear sprocket assembly. Also, in a state where the sprocket carrier is detached from the multi-stage rear sprocket assembly, the volume of the sprocket carrier can be reduced. Also, according to the present application, the disposal weight of the sprocket carrier can be reduced. BRIEF DESCRIPTION OF DRAWINGS

[0051] Figure 1 is a side view of a bicycle according to an embodiment of the present application.

[0052] Figure 2 is a perspective view of a rear sprocket assembly and a sprocket carrier.

[0053] Figure 3 is a front view of a rear sprocket assembly (excluding a locking member).

[0054] Figure 4A is a front view of a sprocket carrier in a flat state.

[0055] Figure 4B is a front view of a sprocket carrier in an engaged state.

[0056] Figure 5 is a front view of a rear sprocket assembly and a sprocket carrier.

[0057] Figure 6A is a side view of a rear sprocket assembly and a sprocket carrier viewed from a second direction.

[0058] Figure 6B is a side view of a rear sprocket assembly and a sprocket carrier viewed from a fourth direction.

[0059] Figure 7A is a side view of a rear sprocket assembly and a sprocket carrier viewed from a first direction.

[0060] Figure 7B is a side view of a rear sprocket assembly and a sprocket carrier viewed from a third direction.

[0061] Figure 8 is a front view of a sprocket carrier in a flat state according to a modified example. DETAILED DESCRIPTION

[0062] As shown in Figure 1 , in an embodiment of the present application, a bicycle 1 is used as an example of a human-powered vehicle. The bicycle 1 has a drive chain 3, a frame 5, handlebars 7, a front wheel 9, a rear wheel 11, a shift operating device 13, a drive portion 15, and a front fork 17. The bicycle 1 also has a front derailleur 21 and a rear derailleur 23.

[0063] As shown in Figure 1As shown, the front fork 17 is rotatably mounted to the frame 5. The handlebars 7 are fixed to the front fork 17. The front wheel 9 is rotatably mounted to the front fork 17 via the front hub assembly 18. The rear wheel 11 is rotatably mounted to the rear of the frame 5 via the rear hub assembly 19. The front tire 9a is mounted to the front wheel 9. The rear tire 11a is mounted to the rear wheel 11.

[0064] The shifting mechanism 13 is mounted on the handlebars 7. The shifting mechanism 13 actuates the front derailleur 21 and the rear derailleur 23 via cables. For example, the rear derailleur 23 is mounted on the frame 5. The rear derailleur 23 moves the drive chain 3 from one rear sprocket to the other via the shifting mechanism 13. The front derailleur 21 is mounted on the frame 5. The front derailleur 21 moves the drive chain 3 from one front sprocket to the other via the shifting mechanism 13.

[0065] The drive unit 15 mainly comprises a rear hub assembly 19, a multi-stage rear sprocket assembly 27, and a crank assembly 29. The drive unit 15 may also include a drive chain 3. The rear hub assembly 19 is mounted on the frame 5.

[0066] The rear wheel 11 is connected to the rear hub assembly 19. A portion of the rear hub assembly 19 rotates integrally with the rear wheel 11. That is, a portion of the rear hub assembly 19 rotates relative to the frame 5. The rear hub assembly 19 is configured to rotate integrally with the multi-stage rear sprocket assembly 27.

[0067] like Figure 1 As shown, the multi-stage rear sprocket assembly 27 has a rotational center axis X. The multi-stage rear sprocket assembly 27 rotates about the rotational center axis X. For example, the multi-stage rear sprocket assembly 27 rotates together with a portion of the rear hub assembly 19. The driving force input by the rider of the bicycle 1 to the crank assembly 29 is transmitted to the multi-stage rear sprocket assembly 27 and the rear hub assembly 19 via the drive chain 3.

[0068] like Figure 1 As shown, the crank assembly 29 has a crank arm 30 and a front sprocket assembly 32. The crank arm 30 is rotatably supported on the lower part of the frame 5. The front sprocket assembly 32 is mounted to the crank arm 30 in a manner that allows it to rotate integrally with the crank arm 30. The front sprocket assembly 32 has at least one front sprocket.

[0069] like Figure 1 As shown, the multi-stage rear sprocket assembly 27 engages with the drive chain 3. The driving force transmitted from the crank assembly 29 to the drive chain 3 is transmitted to the multi-stage rear sprocket assembly 27.

[0070] like Figure 2As shown, the multi-stage rear sprocket assembly 27 includes a plurality of connecting sprockets 31 and at least one separating sprocket 33. In this embodiment, the multi-stage rear sprocket assembly 27 includes a plurality of connecting sprockets 31 and a plurality of separating sprockets 33. The multi-stage rear sprocket assembly 27 also includes a locking member 35.

[0071] In this embodiment, an example is shown where the multi-stage rear sprocket assembly 27 includes a plurality of connecting sprockets 31, a plurality of separating sprockets 33, and a locking member 35. In this case, the locking member 35 forms the central portion 28 of the multi-stage rear sprocket assembly 27, which will be described later.

[0072] The multi-stage rear sprocket assembly 27 may also exclude the locking component 35 and consist of multiple connecting sprockets 31 and multiple separating sprockets 33. In this case, the smallest rear sprocket in the multi-stage rear sprocket assembly 27, for example, the smallest rear sprocket among the multiple separating sprockets 33, constitutes the central portion 28 of the multi-stage rear sprocket assembly 27, which will be described later.

[0073] like Figure 2 As shown, the plurality of connecting sprockets 31 include first to eighth rear sprockets 41-48. The first to eighth rear sprockets 41-48 are coaxially arranged about the rotational center axis X. The first to eighth rear sprockets 41-48 are arranged axially about the rotational center axis X.

[0074] A space (not shown) is provided between two adjacent sprockets in the first to eighth rear sprockets 41-48. In this state, the first to eighth rear sprockets 41-48 are connected by a connecting member (not shown).

[0075] like Figure 2 As shown, the plurality of separate sprockets 33 include a ninth and a tenth rear sprocket 49-50. The ninth and tenth rear sprockets 49-50 are coaxially arranged about the rotation center axis X. The ninth and tenth rear sprockets 49-50 are arranged axially about the rotation center axis X.

[0076] The first to tenth rear sprockets 41-50 are arranged axially about the rotation center axis X. The first rear sprocket 41 is the largest rear sprocket in the multi-stage rear sprocket assembly 27. The tenth rear sprocket 50 is the smallest rear sprocket in the multi-stage rear sprocket assembly 27.

[0077] like Figure 3 As shown, the first to tenth rear sprockets 41-50 each have multiple spline portions 141a-150a. The multiple spline portions 141a-150a respectively form the inner circumferential surface of the first to tenth rear sprockets 41-50. The multiple spline portions 141a-150a engage with the sprocket support body of the rear hub assembly 19. Splines that engage with the spline portions 141a-150a are formed in the sprocket support body.

[0078] Each of the multiple spline sections 141a to 150a includes a positioning spline 141a1 to 150a1. That is, the multiple positioning splines 141a1 to 150a1 are respectively provided on the first to tenth rear sprockets 41 to 50.

[0079] For example, multiple locating splines 141a1 to 148a1 are respectively provided on the first to eighth rear sprockets 41 to 48. Multiple locating splines 149a1 to 150a1 are respectively provided on the ninth and tenth rear sprockets 49 to 50. That is, locating splines 141a1 to 150a1 are provided on multiple connecting sprockets 31 and at least one separating sprocket 33.

[0080] For example, multiple locating splines 141a1 to 150a1 are splines wider than the others. The circumferential length of each of the multiple locating splines 141a1 to 150a1 is longer than the circumferential length of the other splines in each of the multiple spline portions 141a to 150a. The multiple locating splines 141a1 to 150a1 are arranged axially about the rotation center axis X. This arrangement ensures that the circumferential phase of the first to tenth rear sprockets 41 to 50 is aligned.

[0081] The multiple locating splines 141a1~150a1 can also be splines with a width narrower than other splines. The circumferential length of each of the multiple locating splines 141a1~150a1 can also be shorter than the circumferential length of the other splines of the multiple spline sections 141a~150a.

[0082] like Figure 2 As shown, the locking member 35 is arranged axially with the tenth rear sprocket 50 along the axis X about the rotation center. The locking member 35 engages with the tenth rear sprocket 50 in a state of contact with the rear hub assembly 19, thereby mounting a plurality of connecting sprockets 31 and a plurality of separating sprockets 33 on the rear hub assembly 19.

[0083] In this embodiment, such as Figure 2 As shown, the sprocket carrier 55 is used in the multi-stage rear sprocket assembly 27 of the bicycle 1. The sprocket carrier 55 can also be used in human-powered vehicles other than the bicycle 1.

[0084] With the multi-stage rear sprocket assembly 27 removed from the rear hub assembly 19, the sprocket carrier 55 engages with the multi-stage rear sprocket assembly 27. For example, the sprocket carrier 55 engages with at least one of the plurality of connecting sprockets 31 and the plurality of separating sprockets 33, and holds the plurality of connecting sprockets 31 and the plurality of separating sprockets 33.

[0085] Specifically, the sprocket carrier 55 engages with the at least one connecting sprocket 31 and the plurality of separating sprockets 33, and holds the at least one connecting sprocket 31, the plurality of separating sprockets 33, and the locking member 35. The sprocket carrier 55 can also engage with only the at least one connecting sprocket 31, and hold the at least one connecting sprocket 31, the plurality of separating sprockets 33, and the locking member 35.

[0086] As shown in Figure 4A and Figure 4B , the sprocket carrier 55 has a base body 61. The base body 61 is configured to deform between a flat state and an engaged state. Figure 4A represents the flat state. Figure 4B represents the engaged state.

[0087] In the flat state as shown in Figure 4A , the sprocket carrier 55 is not engaged with the multi-stage rear sprocket assembly 27. In the flat state, the base body 61 is flat. For example, in the flat state, the base body 61 is formed in a flat shape.

[0088] In the engaged state as shown in Figure 4B , in a state where the sprocket carrier 55 is engaged with the multi-stage rear sprocket assembly 27, the base body 61 deforms in at least an axial direction with respect to the rotational center axis X of the multi-stage rear sprocket assembly 27.

[0089] As shown in Figure 4A and Figure 4B , the base body 61 is bent toward the rotational center axis X of the multi-stage rear sprocket assembly 27. Thus, in the engaged state, the base body 61 is formed in a three-dimensional shape.

[0090] The base body 61 is formed to have a thickness of 0.3 mm or more and less than 2.0 mm. The base body 61 is formed of a non-metallic material. In the present embodiment, the base body 61 is formed of paper. The base body 61 can also be formed of a biodegradable material.

[0091] As shown in Figure 4A and Figure 4B , the base body 61 includes a center body 63, a first tooth engagement body 65, a second tooth engagement body 67, a third tooth engagement body 69, and a fourth tooth engagement body 71. The base body 61 also includes a weakened portion 73. The base body 61 also includes a position mark 75.

[0092] As shown in Figure 5 , the center body 63 is configured to contact the center portion 28 of the multi-stage rear sprocket assembly 27. For example, in the present embodiment, the center body 63 contacts the locking member 35. That is, in the present embodiment, the locking member 35 is the center portion 28.

[0093] As shown in Figure 4A and Figure 4B , the base body 61 includes a center body 63, a first tooth engagement body 65, a second tooth engagement body 67, a third tooth engagement body 69, and a fourth tooth engagement body 71. The base body 61 also includes a weakened portion 73. The base body 61 also includes a position mark 75.As shown in FIG. 1, the center body 63 is formed in a rectangular shape. The center body 63 has a tool receiving port 63a. The tool receiving port 63a is formed in a circular shape, for example. The shape of the tool receiving port 63a can be other shapes. A tool for installing the locking member 35 to the rear hub assembly 19 is inserted into the tool receiving port 63a.

[0094] As shown in FIG. 1, the first tooth engaging body 65 extends from the center body 63 in a first direction. The first tooth engaging body 65 extends upward from the center body 63 in the view of FIG. 1, for example. The first tooth engaging body 65 is formed integrally with the center body 63. The first tooth engaging body 65 is connected to the center body 63 in a bendable manner with respect to the center body 63. The first tooth engaging body 65 is bent in a normal bend state with respect to the center body 63. Figure 4A Figure 4B As shown in FIG. 1, the first tooth engaging body 65 has a first tooth engaging portion 65a. As shown in FIG. 1, the first tooth engaging portion 65a is configured to engage with the multi-stage rear sprocket assembly 27. The first tooth engaging portion 65a is configured to engage with at least one first link sprocket tooth 48al of the plurality of link sprockets 31, for example. Figure 4A As shown in FIG. 1, the first tooth engaging body 65 has a first adjustment tab 65b. The first adjustment tab 65b is configured to be manually operated. The first adjustment tab 65b is provided to the first tooth engaging body 65. The first adjustment tab 65b is formed integrally with the first tooth engaging body 65.

[0095] Figure 4A As shown in FIG. 1, the first tooth engaging portion 65a engages with the first link sprocket tooth 48al of the eighth rear sprocket 48. The first link sprocket tooth 48al is at least one rear sprocket tooth of the eighth rear sprocket 48. Figure 4B Figure 6A In the case where the base body 61 is in the engaged state, for example, the first tooth engaging body 65 is bent in the normal bend state with respect to the center body 63. The first tooth engaging body 65 is bent in the reverse bend state at the position of the first tooth engaging portion 65a. Figure 6B Figure 7A In the case where the base body 61 is in the engaged state, for example, the first tooth engaging body 65 is bent in the normal bend state with respect to the center body 63. The first tooth engaging body 65 is bent in the reverse bend state at the position of the first tooth engaging portion 65a.

[0096] The first tooth engaging portion 65a can be formed in any shape as long as it is a shape capable of engaging with the first link sprocket tooth 48al. The first tooth engaging portion 65a is formed by providing a cutout to the first tooth engaging body 65, for example. The first tooth engaging portion 65a can be formed in a shape such as a notch and an opening.

[0097] The first tooth engaging portion 65a engages with the first link sprocket tooth 48al of the eighth rear sprocket 48. The first link sprocket tooth 48al is at least one rear sprocket tooth of the eighth rear sprocket 48. Figure 4A Figure 4B The first tooth engaging portion 65a engages with the first link sprocket tooth 48al of the eighth rear sprocket 48. The first link sprocket tooth 48al is at least one rear sprocket tooth of the eighth rear sprocket 48.

[0098] In the case where the base body 61 is in the engaged state, for example, the first tooth engaging body 65 is bent in the normal bend state with respect to the center body 63. The first tooth engaging body 65 is bent in the reverse bend state at the position of the first tooth engaging portion 65a. Figure 6A Figure 6B In the case where the base body 61 is in the engaged state, for example, the first tooth engaging body 65 is bent in the normal bend state with respect to the center body 63. The first tooth engaging body 65 is bent in the reverse bend state at the position of the first tooth engaging portion 65a. Figure 7A In the case where the base body 61 is in the engaged state, for example, the first tooth engaging body 65 is bent in the normal bend state with respect to the center body 63. The first tooth engaging body 65 is bent in the reverse bend state at the position of the first tooth engaging portion 65a.

[0099] In the case where the base body 61 is in the engaged state, for example, the first tooth engaging body 65 is bent in the normal bend state with respect to the center body 63. The first tooth engaging body 65 is bent in the reverse bend state at the position of the first tooth engaging portion 65a.​​​​​​

[0100] In this state, the front end portion 65c of the first tooth engaging body 65 and the first adjustment piece 65b are disposed between the seventh rear sprocket 47 and the eighth rear sprocket 48 when viewed in a side view of the multi-stage rear sprocket assembly 27. The first tooth engaging portion 65a engages with the first connecting sprocket tooth 48al of the eighth rear sprocket 48.

[0101] As shown in Figs. 1 and 2, the second tooth engaging body 67 extends from the center body 63 in a second direction. For example, the second tooth engaging body 67 extends from the center body 63 to the left in the view of Fig. 1. The second tooth engaging body 67 is formed integrally with the center body 63. The second tooth engaging body 67 is connected to the center body 63 in a bendable manner with respect to the center body 63. The second tooth engaging body 67 is bent in a normal bend state with respect to the center body 63. Figure 4A Figure 4B As shown in Figs. 1 and 2, the second tooth engaging body 67 extends from the center body 63 in a second direction. For example, the second tooth engaging body 67 extends from the center body 63 to the left in the view of Fig. 1. The second tooth engaging body 67 is formed integrally with the center body 63. The second tooth engaging body 67 is connected to the center body 63 in a bendable manner with respect to the center body 63. The second tooth engaging body 67 is bent in a normal bend state with respect to the center body 63. Figure 4A

[0102] As shown in Figs. 1 and 2, the second tooth engaging body 67 extends from the center body 63 in a second direction. For example, the second tooth engaging body 67 extends from the center body 63 to the left in the view of Fig. 1. The second tooth engaging body 67 is formed integrally with the center body 63. The second tooth engaging body 67 is connected to the center body 63 in a bendable manner with respect to the center body 63. The second tooth engaging body 67 is bent in a normal bend state with respect to the center body 63. Figure 4A Figure 4B As shown in Figs. 1 and 2, the second tooth engaging body 67 extends from the center body 63 in a second direction. For example, the second tooth engaging body 67 extends from the center body 63 to the left in the view of Fig. 1. The second tooth engaging body 67 is formed integrally with the center body 63. The second tooth engaging body 67 is connected to the center body 63 in a bendable manner with respect to the center body 63. The second tooth engaging body 67 is bent in a normal bend state with respect to the center body 63. Figure 6A Figure 7A Figure 7B As shown in Figs. 1 and 2, the second tooth engaging body 67 extends from the center body 63 in a second direction. For example, the second tooth engaging body 67 extends from the center body 63 to the left in the view of Fig. 1. The second tooth engaging body 67 is formed integrally with the center body 63. The second tooth engaging body 67 is connected to the center body 63 in a bendable manner with respect to the center body 63. The second tooth engaging body 67 is bent in a normal bend state with respect to the center body 63.

[0103] The second tooth engaging portion 67a can be formed in any shape as long as it is a shape that can engage with the first disconnect sprocket tooth 49al. For example, the second tooth engaging portion 67a is formed by providing a cutout in the second tooth engaging body 67. The second tooth engaging portion 67a can also be formed in a shape such as a notch and an opening.

[0104] As shown in Figs. 1 and 2, the second tooth engaging body 67 extends from the center body 63 in a second direction. For example, the second tooth engaging body 67 extends from the center body 63 to the left in the view of Fig. 1. The second tooth engaging body 67 is formed integrally with the center body 63. The second tooth engaging body 67 is connected to the center body 63 in a bendable manner with respect to the center body 63. The second tooth engaging body 67 is bent in a normal bend state with respect to the center body 63. Figure 6A Figure 7A Figure 7B As shown in Figs. 1 and 2, the second tooth engaging body 67 extends from the center body 63 in a second direction. For example, the second tooth engaging body 67 extends from the center body 63 to the left in the view of Fig. 1. The second tooth engaging body 67 is formed integrally with the center body 63. The second tooth engaging body 67 is connected to the center body 63 in a bendable manner with respect to the center body 63. The second tooth engaging body 67 is bent in a normal bend state with respect to the center body 63.

[0105] For example, in the engaged state of the base body 61, the second tooth engaging body 67 is bent in a normal bend state with respect to the center body 63. The second tooth engaging body 67 is bent in a reverse bend state at the position of the second tooth engaging portion 67a.

[0106] ​​​​​​​In this state, when viewed from the side of the multi-stage rear sprocket assembly 27, the front end 67c of the second tooth engagement body 67 is positioned between the eighth rear sprocket 48 and the ninth rear sprocket 49. The second tooth engagement part 67a engages with the first release sprocket tooth 49a1 of the ninth rear sprocket 48.

[0107] like Figure 6A , Figure 7A and Figure 7B As shown, the fifth tooth engagement portion 67b is configured to engage with the multi-stage rear sprocket assembly 27. For example, the fifth tooth engagement portion 67b is configured to engage with at least one third separator sprocket tooth 50a1 of at least one separator sprocket 33.

[0108] The fifth tooth engagement portion 67b can be formed in any shape as long as it can engage with the third separating sprocket tooth 50a1. For example, the fifth tooth engagement portion 67b is formed by providing a cut in the second tooth engagement body 67. The fifth tooth engagement portion 67b can also be formed in a shape such as a groove or opening.

[0109] like Figure 6A , Figure 7A and Figure 7B As shown, the fifth tooth engagement portion 67b engages with the third separation sprocket tooth 50a1 of the tenth rear sprocket 50. The third separation sprocket tooth 50a1 is at least one rear sprocket tooth of the tenth rear sprocket 50.

[0110] For example, when the base 61 is in the engaged state, the second tooth engaging body 67 is bent in a forward-folded state relative to the center body 63 at the position of the fifth tooth engaging portion 67b. The second tooth engaging body 67 is bent in a reverse-folded state at the position of the second tooth engaging portion 67a. In this state, the fifth tooth engaging portion 67b engages with the third release sprocket tooth 50a1 of the tenth rear sprocket 50.

[0111] like Figure 4A and Figure 4B As shown, the third toothed engagement member 69 extends from the central body 63 along a third direction. This third direction is opposite to the first direction with respect to the central body 63. For example, the third toothed engagement member 69 in… Figure 4A From the perspective of the central body 63, it extends downwards. The third toothed engagement 69 is integrally formed with the central body 63. The third toothed engagement 69 is connected to the central body 63 in a bendable manner relative to the central body 63. The third toothed engagement 69 is bent in a forward bend relative to the central body 63.

[0112] like Figure 4A and Figure 4B As shown, the third tooth engagement body 69 has a third tooth engagement portion 69a. The third tooth engagement portion 69a is configured to engage with at least one second connecting sprocket tooth 48a2 of the plurality of connecting sprockets 31.

[0113] The third tooth engaging portion 69a can be formed in any shape as long as it can engage with the second connecting sprocket tooth 48a2. For example, the third tooth engaging portion 69a is formed by providing a notch in the third tooth engaging body 69. The third tooth engaging portion 69a can also be formed in a shape such as a cutout and an opening.

[0114] As shown in Figure 4A and Figure 4B , the third tooth engaging body 69 has a second adjustment piece 69b. The second adjustment piece 69b is configured to be manually operated. The second adjustment piece 69b is provided to the third tooth engaging body 69. The second adjustment piece 69b is formed integrally with the third tooth engaging body 69.

[0115] As shown in Figure 6A , Figure 6B and Figure 7B , the third tooth engaging portion 69a engages with the second connecting sprocket tooth 48a2 of the eighth rear sprocket 48. The second connecting sprocket tooth 48a2 is at least one rear sprocket tooth of the eighth rear sprocket 48. The first connecting sprocket tooth 48a1 of the eighth rear sprocket 48 is different from the second connecting sprocket tooth 48a2 of the eighth rear sprocket 48.

[0116] For example, in a case where the base body 61 is in the engaged state, the third tooth engaging body 69 is bent in a positive folding state with respect to the center body 63. The third tooth engaging body 69 is bent in a reverse folding state at the position of the third tooth engaging portion 69a.

[0117] In this state, the front end portion 69c of the third tooth engaging body 69 and the second adjustment piece 69b are disposed between the seventh rear sprocket 47 and the eighth rear sprocket 48 when viewed from the side of the multi-stage rear sprocket assembly 27. The third tooth engaging portion 69a engages with the first separating sprocket tooth 49a1 of the ninth rear sprocket 48.

[0118] As shown in Figure 4A and Figure 4B , the fourth tooth engaging body 71 extends from the center body 63 in a fourth direction. The second direction is opposite to the fourth direction with respect to the center body 63. For example, the fourth tooth engaging body 71 extends to the right from the center body 63 in the perspective view of Figure 4A . The fourth tooth engaging body 71 is formed integrally with the center body 63. The fourth tooth engaging body 71 is connected to the center body 63 in a manner that it can be bent with respect to the center body 63. The fourth tooth engaging body 71 is bent in a positive folding state with respect to the center body 63.

[0119] In Figure 4AIn the perspective view, the first direction is upward, the second direction is leftward, the third direction is downward, and the fourth direction is rightward. In this way, the first direction, the second direction, the third direction, and the fourth direction are different from each other. In the present embodiment, an example in which the first direction, the second direction, the third direction, and the fourth direction are orthogonal to each other is shown, but the first direction, the second direction, the third direction, and the fourth direction can also be different from each other without being orthogonal.

[0120] As shown in Figure 4A and Figure 4B , the fourth tooth engaging body 71 has a fourth tooth engaging portion 71a. The fourth tooth engaging body 71 also has a sixth tooth engaging portion 71b. As shown in Figure 6B , Figure 7A and Figure 7B , the fourth tooth engaging portion 71a is configured to engage with the multi-stage rear sprocket assembly 27. For example, the fourth tooth engaging portion 71a is configured to engage with at least one second split sprocket tooth 49a2 of at least one split sprocket 33.

[0121] The fourth tooth engaging portion 71a can be formed in any shape as long as it is a shape that can engage with the second split sprocket tooth 49a2. For example, the fourth tooth engaging portion 71a is formed by providing a cutout in the fourth tooth engaging body 71. The fourth tooth engaging portion 71a can also be formed in a shape such as a notch and an opening.

[0122] As shown in Figure 6B , Figure 7A and Figure 7B , the fourth tooth engaging portion 71a engages with the second split sprocket tooth 49a2 of the ninth rear sprocket 49. The second split sprocket tooth 49a2 is at least one rear sprocket tooth of the ninth rear sprocket 49.

[0123] For example, in the case where the base body 61 is in the engaged state, the fourth tooth engaging body 71 is bent in a positive fold state with respect to the center body 63. The fourth tooth engaging body 71 is bent in a reverse fold state at the position of the fourth tooth engaging portion 71a.

[0124] In this state, when the multi-stage rear sprocket assembly 27 is viewed from the side, the front end portion 71c of the fourth tooth engaging body 71 is disposed between the eighth rear sprocket 48 and the ninth rear sprocket 49. The fourth tooth engaging portion 71a engages with the second split sprocket tooth 49a2 of the ninth rear sprocket 48. The second split sprocket tooth 49a2 of the ninth rear sprocket 49 is different from the first split sprocket tooth 49a1 of the ninth rear sprocket 49.

[0125] As shown in Figure 6B , Figure 7A and Figure 7BAs shown, the sixth tooth engagement portion 71b is configured to engage with the multi-stage rear sprocket assembly 27. For example, the sixth tooth engagement portion 71b is configured to engage with at least one fourth separator sprocket tooth 50a2 of at least one separator sprocket 33.

[0126] The sixth tooth engagement portion 71b can be formed in any shape as long as it can engage with the fourth separating sprocket tooth 50a2. For example, the sixth tooth engagement portion 71b is formed by providing a cut in the fourth tooth engagement body 71. The sixth tooth engagement portion 71b can also be formed in a shape such as a groove or opening.

[0127] like Figure 6B , Figure 7A and Figure 7B As shown, the sixth tooth engagement portion 71b engages with the fourth split sprocket tooth 50a2 of the tenth rear sprocket 50. The fourth split sprocket tooth 50a2 is one of at least one rear sprocket tooth of the tenth rear sprocket 50.

[0128] For example, when the base 61 is in the engaged state, the fourth tooth engaging body 71 is bent in a forward-folded state relative to the center body 63 at the position of the sixth tooth engaging portion 71b. The fourth tooth engaging body 71 is bent in a reverse-folded state at the position of the fourth tooth engaging portion 71a. In this state, the sixth tooth engaging portion 71b engages with the fourth separation sprocket tooth 50a2 of the tenth rear sprocket 50. The fourth separation sprocket tooth 50a2 of the tenth rear sprocket 50 is different from the third separation sprocket tooth 50a1 of the tenth rear sprocket 50.

[0129] Figure 4A and Figure 4B The weakening portion 73 shown is configured to facilitate the removal of the sprocket carrier 55 from the multi-stage rear sprocket assembly 27. The weakening portion 73 is provided in the central body 63. For example, the weakening portion 73 is provided between the corner formed by the tool receiving port 63a, the second toothed engagement body 67, and the third toothed engagement body 69.

[0130] A perforation is provided in the weakened portion 73. The perforation extends in a straight line from the inner circumferential surface of the hole in the central body 63 used to form the tool receiving port 63a toward the gap between the second toothed engagement body 67 and the third toothed engagement body 69. Alternatively, the perforation may extend in a curved line from the inner circumferential surface of the hole in the central body 63 toward the aforementioned gap.

[0131] Figure 4A and Figure 4B The position mark 75 shown is used to indicate the position of the locating spline of the multi-stage rear sprocket assembly 27 when the sprocket carrier 55 is mounted on the rear hub assembly 19. Figure 3 The positioning splines 141a1~150a1 shown are consistent.

[0132] A position mark 75 is provided to the center body 63. In the present embodiment, the position mark 75 is provided to the inner peripheral surface of the hole portion that forms the tool receiving port 63a. The position mark 75 is a notch.

[0133] The position mark 75 can be provided to a position different from the above and can be formed in a shape different from the above as long as it can be aligned with the positioning spline 141al to 150al. For example, the position mark 75 can be a notch, an opening, a protrusion, a recess, and a mark.

[0134] The sprocket carrier 55 having the above structure is installed to the multi-stage rear sprocket assembly 27 as follows. First, the locking member 35 is disposed in opposition to the center body 63 in a manner to contact the center body 63.

[0135] Next, the position mark 75 is aligned with the positioning spline 150al of the tenth rear sprocket 50, whereby the position of the sprocket carrier 55 with respect to the tenth rear sprocket 50 about the circumferential direction of the rotational center axis X is determined. The tenth rear sprocket 50 is the split sprocket 33.

[0136] Next, the fifth tooth engaging portion 67b of the second tooth engaging body 67 and the sixth tooth engaging portion 71b of the fourth tooth engaging body 71 are engaged to the third split sprocket tooth 50al of the tenth rear sprocket 50 and the fourth split sprocket tooth 50a2 of the tenth rear sprocket 50, respectively, whereby the tenth rear sprocket 50 and the locking member 35 are arranged in the axial direction about the rotational center axis X.

[0137] Next, the positioning spline 149al of the ninth rear sprocket 49 is aligned with the positioning spline 150al of the tenth rear sprocket 50, whereby the position of the sprocket carrier 55 with respect to the ninth rear sprocket 49 is determined. The ninth rear sprocket 49 is one of the plurality of split sprockets 33.

[0138] Next, the second tooth engaging portion 67a of the second tooth engaging body 67 and the fourth tooth engaging portion 71a of the fourth tooth engaging body 71 are engaged to the first split sprocket tooth 49al of the ninth rear sprocket 49 and the second split sprocket tooth 49a2 of the ninth rear sprocket 49, respectively, whereby the ninth rear sprocket 49 and the tenth rear sprocket 50 are arranged in the axial direction about the rotational center axis X.

[0139] In this way, the sprocket carrier 55 holds the locking member 35, the tenth rear sprocket 50, and the ninth rear sprocket 49. That is, in this state, the sprocket carrier 55 holds the locking member 35 and the plurality of split sprockets 33.

[0140] Then, the positioning spline 148al of the eighth rear sprocket 48 is aligned with the positioning spline 149al of the ninth rear sprocket 49, whereby the position of the sprocket carrier 55 with respect to the eighth rear sprocket 48 is determined. The eighth rear sprocket 49 is one of the plurality of link sprockets 31.

[0141] Next, the first adjusting piece 65b of the first tooth engaging body 65 is pressed on the radially inner side with respect to the rotational center axis line X in a manner that the front end portion 65c of the first tooth engaging body 65 is inserted between the seventh and eighth rear sprockets 47, 48. By this operation, the first tooth engaging portion 65a of the first tooth engaging body 65 is engaged with the first connecting sprocket tooth 48al of the eighth rear sprocket 48.

[0142] Next, the second adjusting piece 69b of the third tooth engaging body 69 is pressed on the radially inner side with respect to the rotational center axis line X in a manner that the front end portion 69c of the third tooth engaging body 69 is inserted between the seventh and eighth rear sprockets 47, 48. By this operation, the third tooth engaging portion 69a of the third tooth engaging body 69 is engaged with the second connecting sprocket tooth 48a2 of the eighth rear sprocket 48.

[0143] Thus, the sprocket carrier 55 holds the lock member 35, the ninth and tenth rear sprockets 49, 50, and the eighth rear sprocket 48. As described above, the first to eighth rear sprockets 41 to 48 are a plurality of connecting sprockets 31. Thus, the sprocket carrier 55 holds the lock member 35, the plurality of split sprockets 33, and the plurality of connecting sprockets 31. This state is a state in which the sprocket carrier 55 is attached to the multi-stage rear sprocket assembly 27.

[0144] The sprocket carrier 55 having the above-described structure is detached from the multi-stage rear sprocket assembly 27 as follows. First, the second adjusting piece 69b of the third tooth engaging body 69 is stretched in the radial direction with respect to the rotational center axis line X. By this operation, the engagement of the third tooth engaging body 69 and the eighth rear sprocket 48 is released.

[0145] Next, the second adjusting piece 69b is stretched in the axial direction with respect to the rotational center axis line X in a manner that the center body 63 is broken along the perforated portion of the weakening portion 73. After the center body 63 is broken along the perforated portion of the weakening portion 73, the second adjusting piece 69b is stretched toward the front end portion 71c of the fourth tooth engaging body 71. By this operation, the engagement of the fourth tooth engaging body 71 and the ninth and tenth rear sprockets 49, 50 is released.

[0146] In this state, the second adjusting piece 69b is rotated in the first rotational direction R with respect to the rotational center axis line X. In the first rotational direction R, the second adjusting piece 69b is rotated in the counterclockwise direction R with respect to the rotational center axis line X. Figure 4A In the first rotational direction R, the second adjusting piece 69b is rotated in the counterclockwise direction R with respect to the rotational center axis line X. Figure 4B In the first rotational direction R, the second adjusting piece 69b is rotated in the counterclockwise direction R with respect to the rotational center axis line X. By this operation, the engagement of the first tooth engaging body 65 and the eighth rear sprocket 48, and the engagement of the second tooth engaging body 67 and the ninth and tenth rear sprockets 49, 50 are sequentially released. Thus, the sprocket carrier 55 is detached from the multi-stage rear sprocket assembly 27.

[0147] (Modified Example)

[0148] In the described embodiment, an example is shown where the first tooth engagement 65 and the third tooth engagement 69 of the sprocket carrier 55 engage with the eighth rear sprocket 48. The first tooth engagement 65 and the third tooth engagement 69 can also engage with a rear sprocket other than the eighth rear sprocket 48, as long as they are any one of the plurality of connecting sprockets 31.

[0149] For example, such as Figure 8 As shown, by making the radial length of the first toothed engagement 65 and the radial length of the third toothed engagement 69 of the sprocket carrier 155 more than the radial length of the first toothed engagement 65, Figure 4A The sprocket carrier is 55mm long, allowing it to engage with a rear sprocket different from the eighth rear sprocket 48. Additionally, in Figure 8 In the text, structures that are the same as those in the described embodiment are marked with the same symbols as those in the described embodiment.

[0150] Explanation of reference numerals in the attached figures

[0151] 1…Bicycle; 3…Drive chain; 19…Rear hub assembly; 27…Multi-stage rear sprocket assembly; 28…Center section; 31…Connecting sprocket; 33…Separating sprocket; 35…Locking component; 41~50…First to tenth rear sprockets; 48…Eighth rear sprocket; 48a…First connecting sprocket tooth, second connecting sprocket tooth; 49…Ninth rear sprocket; 49a…First separating sprocket tooth, second separating sprocket tooth; 50…Tenth rear sprocket; 50a…Third separating sprocket tooth, fourth separating sprocket tooth; 61…Base Body; 63…Central body; 63a…Tool receiving port; 65…First toothed engagement body; 65a…First toothed engagement part; 65b…First adjusting piece; 67…Second toothed engagement body; 67a…Second toothed engagement part; 67b…Fifth toothed engagement part; 69…Third toothed engagement body; 69a…Third toothed engagement part; 69b…Second adjusting piece; 71…Fourth toothed engagement body; 71a…Fourth toothed engagement part; 71b…Sixth toothed engagement part; 73…Weakening part; 75…Position mark; X…Rotation center axis.

Claims

1. A sprocket carrier used in a multi-stage rear sprocket assembly including a plurality of link sprockets and at least one split sprocket, characterized by: the sprocket carrier having a base body configured to deform between a flat state and an engaged state, in the flat state, the base body is flat, in the engaged state, the base body deforms in at least an axial direction of the multi-stage rear sprocket assembly about a rotational center axis in a state where the sprocket carrier is engaged with the multi-stage rear sprocket assembly, the base body including: a center body configured to contact a center portion of the multi-stage rear sprocket assembly; a first tooth engagement body extending from the center body in a first direction, having a first tooth engagement portion configured to engage at least one first link sprocket tooth of the plurality of link sprockets; a second tooth engagement body extending from the center body in a second direction, having a second tooth engagement portion configured to engage the multi-stage rear sprocket assembly; a third tooth engagement body extending from the center body in a third direction, having a third tooth engagement portion configured to engage at least one second link sprocket tooth of the plurality of link sprockets; and a fourth tooth engagement body extending from the center body in a fourth direction, having a fourth tooth engagement portion configured to engage the multi-stage rear sprocket assembly, the first direction, the second direction, the third direction, and the fourth direction being different from each other.

2. The sprocket carrier according to claim 1, characterized by: the center body having a tool receiving port.

3. The sprocket carrier according to claim 1, characterized by: the second tooth engagement portion of the second tooth engagement body being configured to engage at least one first split sprocket tooth of the at least one split sprocket, the fourth tooth engagement portion of the fourth tooth engagement body being configured to engage at least one second split sprocket tooth of the at least one split sprocket.

4. The sprocket carrier according to claim 1, characterized by: the first tooth engagement body having a first adjustment tab configured to be manually operated.

5. The sprocket carrier according to claim 4, characterized by: the third tooth engagement body having a second adjustment tab configured to be manually operated.

6. The sprocket carrier according to claim 1, characterized by: the first direction being opposite to the third direction with respect to the center body.

7. The sprocket carrier according to claim 3, characterized by: the second tooth engagement body having a fifth tooth engagement portion configured to engage at least one third split sprocket tooth of the at least one split sprocket.

8. The sprocket carrier according to claim 7, characterized by: the fourth tooth engagement body having a sixth tooth engagement portion configured to engage at least one fourth split sprocket tooth of the at least one split sprocket.

9. The sprocket carrier according to claim 1, characterized by: the second direction being opposite to the fourth direction with respect to the center body.

10. The sprocket carrier according to claim 1, characterized by: The base includes a position mark configured in conformity with a positioning spline, The positioning spline is provided to the plurality of connecting sprockets and the at least one separating sprocket.

11. The sprocket carrier according to claim 1, characterized in that The base has a weakened portion configured in a manner to facilitate removal of the sprocket carrier from the multi-stage rear sprocket assembly.

12. The sprocket carrier according to claim 11, characterized in that A perforation is provided at the weakened portion.

13. The sprocket carrier according to claim 11, characterized in that The weakened portion is provided to the central body.

14. The sprocket carrier according to claim 1, characterized in that The base is formed of a non-metallic material.

15. The sprocket carrier according to claim 14, characterized in that The base is formed of paper.

16. The sprocket carrier according to claim 1, characterized in that The base is formed of a biodegradable material.

Images