Hub assembly for human-powered vehicle

Abstract

A hub assembly includes a hub shaft, a hub housing, a sprocket support, a first bearing unit, a second bearing unit, and a sleeve. The sleeve includes a first abutment portion and a second abutment portion. The first abutment portion abuts the first inner race. The second abutment portion abuts the second inner race in the radial direction.

Description

Technical Field

[0001] The invention relates to a hub assembly for a human-powered vehicle. Background Art

[0002] A human-powered vehicle includes a hub assembly. The hub assembly includes a rotating member and at least two bearing units configured to rotatably support the rotating member. One of the purposes of the present disclosure is to correctly position the at least two bearing units. Summary of the invention

[0003] According to a first aspect of the present invention, a hub assembly for a human-powered vehicle includes a hub shaft, a hub shell, a sprocket support, a first bearing unit, a second bearing unit, and a sleeve. The hub shaft has a central axis defining an axial direction, a radial direction, and a circumferential direction. The hub shell is rotatably mounted on the hub shaft to rotate around the central axis. The sprocket support is rotatably mounted on the hub shaft to rotate around the central axis. The sprocket support is configured to support at least one sprocket. The first bearing unit is disposed between the hub shaft and the hub shell in a radial direction. The second bearing unit is disposed between the hub shaft and the sprocket support in a radial direction. The sleeve is mounted on the hub shaft and extends in an axial direction. The sleeve is contactable with the hub shaft in a radial direction. The first bearing unit includes a first inner race coupled to the hub shaft, a first outer race coupled to the hub shell, and at least two first rolling members disposed between the first inner race and the first outer race in a radial direction. The second bearing unit includes a second inner race coupled to the hub axle, a second outer race coupled to the sprocket support body, and at least two second rolling members arranged between the second inner race and the second outer race in a radial direction. The sleeve includes a first abutment portion and a second abutment portion. The first abutment portion abuts the first inner race. The second abutment portion abuts the second inner race in a radial direction.

[0004] With the hub assembly according to the first aspect, the first abutment portion and the second abutment portion enable the first bearing unit and the second bearing unit to be correctly positioned.

[0005] According to a second aspect of the present invention, the hub assembly according to the first aspect is configured so that the first abutment portion of the sleeve abuts the first inner race in the axial direction.

[0006] With the hub assembly according to the second aspect, the first abutment portion and the second abutment portion enable the first bearing unit and the second bearing unit to be positioned more correctly.

[0007] According to a third aspect of the present invention, the hub assembly according to the first aspect or the second aspect further includes a third bearing unit, which is arranged between the hub shaft and the sprocket support body in the radial direction. The third bearing unit includes a third inner race coupled to the hub shaft, a third outer race coupled to the sprocket support body, and at least two third rolling members arranged between the third inner race and the third outer race in the radial direction. The sleeve also includes a third adjacent portion adjacent to the third inner race.

[0008] With the hub assembly according to the third aspect, the first abutment portion, the second abutment portion, and the third abutment portion enable the first bearing unit, the second bearing unit, and the third bearing unit to be correctly positioned.

[0009] According to a fourth aspect of the present invention, the hub assembly according to the third aspect is configured so that the third abutment portion of the sleeve abuts the third inner race in the axial direction.

[0010] With the hub assembly according to the fourth aspect, the first abutment portion, the second abutment portion, and the third abutment portion enable the first bearing unit, the second bearing unit, and the third bearing unit to be positioned more correctly.

[0011] According to a fifth aspect of the present invention, the hub assembly according to any one of the first to fourth aspects is configured so that the first abutment portion is at least partially located radially outward from the second abutment portion in the radial direction.

[0012] With the hub assembly according to the fifth aspect, the first abutment portion and the second abutment portion enable the first bearing unit and the second bearing unit to be positioned more correctly.

[0013] According to a sixth aspect of the present invention, the hub assembly according to the third aspect or the fourth aspect is configured such that the sleeve includes a first axial end and a second axial end opposite to the first axial end in the axial direction. The first axial end includes a first abutment portion. The second axial end includes a third abutment portion.

[0014] With the hub assembly according to the sixth aspect, the first abutment portion and the second abutment portion enable the first bearing unit and the second bearing unit to be positioned more correctly.

[0015] According to a seventh aspect of the present invention, the hub assembly according to the sixth aspect is configured so that the first axial end is located closer to an axial center plane of the hub assembly in the axial direction than the second axial end.

[0016] With the hub assembly according to the seventh aspect, the first abutment portion and the second abutment portion enable the first bearing unit and the second bearing unit to be positioned more correctly.

[0017] According to an eighth aspect of the present invention, the hub assembly according to any one of the first to seventh aspects is configured so that the sleeve is made of a metal material.

[0018] With the hub assembly according to the eighth aspect, the rigidity of the sleeve can be improved.

[0019] According to a ninth aspect of the present invention, the hub assembly according to any one of the first to eighth aspects further includes a one-way clutch structure disposed radially outward from the second bearing unit in the radial direction.

[0020] With the hub assembly according to the ninth aspect, the space provided radially outward from the second bearing unit can be utilized as a place for arranging the one-way clutch structure. Therefore, the second bearing unit and the one-way clutch structure can be efficiently arranged.

[0021] According to a tenth aspect of the present invention, the hub assembly according to the ninth aspect is configured so that the one-way clutch structure includes a first ratchet member and a second ratchet member. The first ratchet member is configured to engage with one of the hub housing and the sprocket support body. The second ratchet member is configured to engage with the other of the hub housing and the sprocket support body. One of the first ratchet member and the second ratchet member is configured to be movable in the axial direction relative to the other of the first ratchet member and the second ratchet member.

[0022] With the hub assembly according to the tenth aspect, the rotation of the hub shell and the sprocket support body can be controlled during pedaling or coasting using the one-way clutch structure.

[0023] According to the eleventh aspect of the present invention, a hub assembly for a human-powered vehicle includes a hub axle, a hub shell, a sprocket support body, an axially outward bearing unit, an axially inward bearing unit and a sleeve. The hub axle has a central axis defining an axial direction, a radial direction and a circumferential direction. The hub shell is rotatably mounted on the hub axle to rotate around the central axis. The sprocket support body is rotatably mounted on the hub axle to rotate around the central axis. The sprocket support body is configured to support at least one sprocket. The axially outward bearing unit is arranged between the hub axle and the sprocket support body in the radial direction. The axially inward bearing unit is arranged between the hub axle and the sprocket support body in the radial direction. The axially inward bearing unit is arranged to be closer to the axial center plane of the hub assembly in the axial direction than the axially outward bearing unit. The sleeve is mounted on the hub axle and extends in the axial direction. The sleeve is contactable with the hub axle in the radial direction. The axially outward bearing unit includes an axially outward inner race connected to the hub axle, an axially outward outer race connected to the sprocket support body, and at least two axially outward rolling members arranged in the radial direction between the axially outward inner race and the axially outward outer race. The axially inward bearing unit includes an axially inward inner race connected to the hub axle, an axially outward inner race connected to the sprocket support body, and at least two axially inward rolling members arranged in the radial direction between the axially inward inner race and the axially outward inner race. The sleeve includes an axially adjacent portion and a radially adjacent portion. The axially adjacent portion is adjacent to the axially outward inner race in the axial direction. The radially adjacent portion is adjacent to the axially inward inner race in the radial direction. The sleeve is not radially adjacent to the axially outward inner race relative to the center axis.

[0024] With the hub assembly according to the eleventh aspect, the axial abutment portion and the radial abutment portion enable the axially outward bearing unit and the axially inward bearing unit to be correctly positioned.

[0025] According to a twelfth aspect of the present invention, the hub assembly according to the eleventh aspect is configured so that the sleeve is made of a metal material.

[0026] With the hub assembly according to the twelfth aspect, the rigidity of the sleeve can be improved.

[0027] According to a thirteenth aspect of the present invention, the hub assembly according to the eleventh aspect or the twelfth aspect further includes a one-way clutch structure, which is disposed radially outward from the axially inward bearing unit in the radial direction.

[0028] With the hub assembly according to the thirteenth aspect, the space provided radially outward from the axially inward bearing unit can be utilized as a place for arranging the one-way clutch structure. Therefore, the axially inward bearing unit and the one-way clutch structure can be efficiently arranged.

[0029] According to a fourteenth aspect of the present invention, the hub assembly according to the thirteenth aspect is configured so that the one-way clutch structure includes a first ratchet member and a second ratchet member. The first ratchet member is configured to engage with one of the hub housing and the sprocket support body. The second ratchet member is configured to engage with the other of the hub housing and the sprocket support body. One of the first ratchet member and the second ratchet member is configured to be movable in the axial direction relative to the other of the first ratchet member and the second ratchet member.

[0030] With the hub assembly according to the fourteenth aspect, the rotation of the hub shell and the sprocket support body can be controlled during pedaling or coasting using the one-way clutch structure.

[0031] According to the fifteenth aspect of the present invention, a hub assembly for a human-powered vehicle includes a hub axle, a hub shell, a sprocket support body, an axially outward bearing unit, an axially inward bearing unit and a sleeve. The hub axle has a central axis defining an axial direction, a radial direction and a circumferential direction. The hub shell is rotatably mounted on the hub axle to rotate around the central axis. The sprocket support body is rotatably mounted on the hub axle to rotate around the central axis. The sprocket support body is configured to support at least one sprocket. The axially outward bearing unit is arranged between the hub axle and the sprocket support body in the radial direction. The axially inward bearing unit is arranged between the hub axle and the sprocket support body in the radial direction. The axially inward bearing unit is arranged to be closer to the axial center plane of the hub assembly in the axial direction than the axially outward bearing unit. The sleeve is mounted on the hub axle and extends in the axial direction. The sleeve is contactable with the hub axle in the radial direction. The axially outward bearing unit includes an axially outward inner race connected to the hub axle, an axially outward outer race connected to the sprocket support body, and at least two axially outward rolling members arranged in the radial direction between the axially outward inner race and the axially outward outer race. The axially inward bearing unit includes an axially inward inner race connected to the hub axle, an axially outward inner race connected to the sprocket support body, and at least two axially inward rolling members arranged in the radial direction between the axially inward inner race and the axially outward inner race. The sleeve includes an axially adjacent portion and a radially adjacent portion. The axially adjacent portion is adjacent to the axially outward inner race in the axial direction. The radially adjacent portion is adjacent to the axially inward inner race in the radial direction. The sleeve is not axially adjacent to the axially inward inner race relative to the center axis.

[0032] With the hub assembly according to the fifteenth aspect, the axial abutment portion and the radial abutment portion enable the axially outward bearing unit and the axially inward bearing unit to be correctly positioned.

[0033] In accordance with a sixteenth aspect of the present invention, the hub assembly according to the fifteenth aspect is configured so that the sleeve does not radially abut the axially outward inner race relative to the center axis.

[0034] With the hub assembly according to the sixteenth aspect, the axial abutment portion and the radial abutment portion enable the axially outward bearing unit and the axially inward bearing unit to be positioned more correctly.

[0035] According to a seventeenth aspect of the present invention, the hub assembly according to the fifteenth aspect or the sixteenth aspect is configured so that the sleeve is made of a metal material.

[0036] With the hub assembly according to the seventeenth aspect, the rigidity of the sleeve can be improved.

[0037] According to an eighteenth aspect of the present invention, the hub assembly according to any one of the fifteenth to seventeenth aspects further includes a one-way clutch structure disposed radially outward from the axially inward bearing unit in the radial direction.

[0038] With the hub assembly according to the eighteenth aspect, the space provided radially outward from the axially inward bearing unit can be utilized as a place for arranging the one-way clutch structure. Therefore, the axially inward bearing unit and the one-way clutch structure can be efficiently arranged.

[0039] According to a nineteenth aspect of the present invention, the hub assembly according to the eighteenth aspect is configured so that the one-way clutch structure includes a first ratchet member and a second ratchet member. The first ratchet member is configured to engage with one of the hub housing and the sprocket support body. The second ratchet member is configured to engage with the other of the hub housing and the sprocket support body. One of the first ratchet member and the second ratchet member is configured to be movable in the axial direction relative to the other of the first ratchet member and the second ratchet member.

[0040] With the hub assembly according to the nineteenth aspect, the rotation of the hub shell and the sprocket support body can be controlled during pedaling or coasting using the one-way clutch structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] A more complete understanding of the present invention and many of its attendant advantages may be readily obtained, as well as better appreciated, by referring to the following detailed description taken in conjunction with the accompanying drawings.

[0042] Figure 1 is a perspective view of a human-powered vehicle including a hub assembly according to one of the embodiments.

[0043] Figure 2 yes Figure 1 A side elevation view of the hub assembly is shown.

[0044] Figure 3 is along Figure 1 A cross-sectional view of the hub assembly taken along line III-III.

[0045] Figure 4 is along Figure 1A partial cross-sectional view of the hub assembly taken along line IV-IV.

[0046] Figure 5 is along Figure 1 A partial cross-sectional view of the hub assembly taken along line VV.

[0047] Figure 6 is along Figure 1 A partial cross-sectional view of the hub assembly taken along line VI-VI.

[0048] Figure 7 yes Figure 1 A perspective view of the sleeve of the hub assembly is shown.

[0049] Figure 8 yes Figure 1 An exploded perspective view of a portion of the hub assembly is shown.

[0050] Fig. 9 is along Figure 6 A cross-sectional view of the hub assembly taken along line IX-IX.

[0051] Fig.10 yes Figure 1 An exploded perspective view of a portion of the hub assembly is shown.

[0052] Fig.11 yes Figure 1 An exploded perspective view of a portion of the hub assembly is shown.

[0053] Fig.12 It is shown Figure 1 Schematic diagram of the action of the first ratchet member and the sprocket support body of the hub assembly (pedaling).

[0054] Fig.13 It is shown Figure 1 Schematic diagram (sliding) of the action of the first ratchet member and the sprocket support body of the hub assembly shown.

[0055] Fig.14 is along Figure 1 An enlarged cross-sectional view of the hub assembly taken along line XIV-XIV of FIG. DETAILED DESCRIPTION

[0056] The embodiments will now be described with reference to the drawings, wherein like reference numerals designate corresponding or identical elements throughout the various drawings.

[0057] like Figure 1 and Figure 2As shown, the hub assembly 10 for a human-powered vehicle 2 includes a hub axle 12, a hub shell 14, and a sprocket support 16. The hub axle 12 has a center axis A1. The hub axle 12 extends along the center axis A1. The center axis A1 defines an axial direction D1. The center axis A1 defines a circumferential direction D2. The center axis A1 defines a radial direction D4. The axial direction D1 is defined along the center axis A1. The circumferential direction D2 is defined around the center axis A1. The radial direction D4 is defined as being perpendicular to the center axis A1. The hub shell 14 is rotatably mounted on the hub axle 12 to rotate around the center axis A1. The hub shell 14 is rotatably mounted on the hub axle 12 to rotate around the center axis A1. The sprocket support 16 is rotatably mounted on the hub axle 12 to rotate around the center axis A1. The hub shell 14 is configured to be coupled to at least two spokes of a wheel.

[0058] In the present application, the term "human-powered vehicle" includes a vehicle that travels with power including at least the human power of the user riding the vehicle. Human-powered vehicles include various bicycles, such as mountain bikes, road bikes, city bikes, cargo bikes, hand bikes and recumbent bikes. In addition, human-powered vehicles include electric bicycles called E-bikes. Electric bicycles include electric-assisted bicycles configured to assist the propulsion of the vehicle with an electric motor. However, the total number of wheels of the human-powered vehicle is not limited to two. For example, human-powered vehicles include vehicles with one wheel or three or more wheels. In particular, human-powered vehicles do not include vehicles that use only a driving source as power. Examples of driving sources include internal combustion engines and electric motors. In general, light road vehicles, including vehicles that do not require a driver's license on public roads, are considered human-powered vehicles.

[0059] In this application, the following directional terms "front," "rear," "forward," "rearward," "left," "right," "lateral," "upward," and "downward," and any other similar directional terms refer to those directions determined based on a user in a standard position of the user in a human-powered vehicle 2 and facing the handlebars or steering device. Examples of a standard position of the user include a saddle and a seat. Therefore, these terms used to describe the hub assembly 10 or other components should be interpreted relative to a human-powered vehicle 2 equipped with the hub assembly 10 or other components used in an upright riding position on a horizontal plane.

[0060] like Figure 2As shown, the hub axle 12 is configured to be fixed to the body 6 of the human-powered vehicle 2 by a hub fixing structure. The sprocket support body 16 is configured to support at least one sprocket. The sprocket support body 16 is configured to support a sprocket assembly 4 including at least one sprocket. The sprocket support body 16 is connected to the sprocket assembly 4 to rotate integrally with the sprocket assembly 4 around the central axis A1. The sprocket support body 16 includes at least two external spline teeth 18. The at least two external spline teeth 18 are configured to engage with at least two internal spline teeth of the sprocket assembly 4.

[0061] An axial center plane CP is defined to bisect the axial length AL of the hub assembly 10 in the axial direction D1. The axial center plane CP is perpendicular to the center axis A1.

[0062] like Figure 3 As shown, the hub assembly 10 for the human-driven vehicle 2 includes a first bearing unit 20. The first bearing unit 20 is disposed between the hub axle 12 and the hub shell 14 in the radial direction D4. The first bearing unit 20 is configured to rotatably support the hub shell 14 relative to the hub axle 12 about the center axis A1.

[0063] The hub assembly 10 for the human-powered vehicle 2 includes a second bearing unit 22. The second bearing unit 22 is disposed in the radial direction D4 between the hub axle 12 and the sprocket support body 16. The second bearing unit 22 is configured to rotatably support the sprocket support body 16 relative to the hub axle 12 about the center axis A1.

[0064] The hub assembly 10 further includes a third bearing unit 24. The third bearing unit 24 is disposed in the radial direction D4 between the hub axle 12 and the sprocket support body 16. The third bearing unit 24 is configured to rotatably support the sprocket support body 16 relative to the hub axle 12 about the center axis A1.

[0065] The hub assembly 10 for the human-powered vehicle 2 includes a fourth bearing unit 26. The fourth bearing unit 26 is disposed between the hub axle 12 and the hub shell 14 in the radial direction D4. The fourth bearing unit 26 is configured to rotatably support the hub shell 14 relative to the hub axle 12 about the center axis A1.

[0066] The first bearing unit 20 is disposed closer to the axial center plane CP of the hub assembly 10 in the axial direction D1 than the second bearing unit 22. The second bearing unit 22 is disposed closer to the axial center plane CP of the hub assembly 10 in the axial direction D1 than the third bearing unit 24. The second bearing unit 22 is disposed between the first bearing unit 20 and the third bearing unit 24 in the axial direction D1.

[0067] The second bearing unit 22 may also be referred to as an axially inward bearing unit 22. The third bearing unit 24 may also be referred to as an axially outward bearing unit 24. That is, the hub assembly 10 for the human-powered vehicle 2 includes an axially inward bearing unit 22. The hub assembly 10 for the human-powered vehicle 2 includes an axially outward bearing unit 24. The axially inward bearing unit 22 is disposed between the hub shaft 12 and the sprocket support body 16 along the radial direction D4. The axially outward bearing unit 24 is disposed between the hub shaft 12 and the sprocket support body 16 along the radial direction D4. The axially inward bearing unit 22 is disposed closer to the axial center plane CP of the hub assembly 10 in the axial direction D1 than the axially outward bearing unit 24.

[0068] like Figure 4 As shown, the first bearing unit 20 includes a first inner race 20A, a first outer race 20B and at least two first rolling members 20C. The first inner race 20A is coupled to the hub axle 12. The first outer race 20B is coupled to the hub shell 14. At least two first rolling members 20C are arranged between the first inner race 20A and the first outer race 20B in the radial direction D4. For example, the first rolling member 20C includes a bearing such as a ball.

[0069] The second bearing unit 22 includes a second inner race 22A, a second outer race 22B, and at least two second rolling members 22C. The second inner race 22A is coupled to the hub axle 12. The second outer race 22B is coupled to the sprocket support 16. The at least two second rolling members 22C are arranged between the second inner race 22A and the second outer race 22B in the radial direction D4. For example, the second rolling member 22C includes a bearing such as a ball.

[0070] The second inner race 22A may also be referred to as the axially inward inner race 22A. The second outer race 22B may also be referred to as the axially inward inner race 22B. The second rolling member 22C may also be referred to as the axially inward rolling member 22C. That is, the axially inward bearing unit 22 includes the axially inward inner race 22A, the axially inward inner race 22B and at least two axially inward rolling members 22C. The axially inward inner race 22A is connected to the hub axle 12. The axially inward inner race 22B is connected to the sprocket support body 16. At least two axially inward rolling members 22C are arranged between the axially inward inner race 22A and the axially inward inner race 22B in the radial direction D4.

[0071] The third bearing unit 24 includes a third inner race 24A, a third outer race 24B and at least two third rolling members 24C. The third inner race 24A is coupled to the hub axle 12. The third outer race 24B is coupled to the sprocket support 16. The at least two third rolling members 24C are arranged between the third inner race 24A and the third outer race 24B in the radial direction D4. For example, the third rolling member 24C includes a bearing such as a ball.

[0072] The third inner race 24A may also be referred to as the axially outward inner race 24A. The third outer race 24B may also be referred to as the axially outward outer race 24B. The third rolling member 24C may also be referred to as the axially outward rolling member 24C. That is, the axially outward bearing unit 24 includes an axially outward inner race 24A, an axially outward outer race 24B and at least two axially outward rolling members 24C. The axially outward inner race 24A is connected to the hub axle 12. The axially outward outer race 24B is connected to the sprocket support body 16. At least two axially outward rolling members 24C are arranged between the axially outward inner race 24A and the axially outward outer race 24B in the radial direction D4.

[0073] like Figure 5 As shown, the fourth bearing unit 26 includes a fourth inner race 26A, a fourth outer race 26B and at least two fourth rolling members 26C. The fourth inner race 26A is coupled to the hub axle 12. The fourth outer race 26B is coupled to the hub shell 14. At least two fourth rolling members 26C are arranged between the fourth inner race 26A and the fourth outer race 26B in the radial direction D4. For example, the fourth rolling member 26C includes a bearing such as a ball.

[0074] like Figure 3 As shown, the hub axle 12 includes an axle body 12B, a first coupling member 12C and a second coupling member 12D. The axle body 12B includes a first axle end 12E and a second axle end 12F. The axle body 12B extends between the first axle end 12E and the second axle end 12F. The first coupling member 12C is coupled to the first axle end 12E of the axle body 12B. The second coupling member 12D is coupled to the second axle end 12F of the axle body 12B.

[0075] The shaft body 12B includes a first threaded portion 12X and a second threaded portion 12Y. The first coupling member 12C includes a first threaded hole 12C1. The first threaded hole 12C1 engages with the first threaded portion 12X when the first coupling member 12C is coupled to the first axial end 12E of the shaft body 12B. The second coupling member 12D includes a second threaded hole 12D1. The second threaded hole 12D1 engages with the second threaded portion 12Y when the second coupling member 12D is coupled to the second axial end 12F of the shaft body 12B.

[0076] The shaft body 12B includes a first stopper 12G and a second stopper 12H. The first stopper 12G is contactable with the first bearing unit 20. The second stopper 12H is contactable with the fourth bearing unit 26. The first bearing unit 20 is held between the first stopper 12G and the first coupling member 12C. The fourth bearing unit 26 is held between the second stopper 12H and the second coupling member 12D.

[0077] like Figure 4 As shown, the hub assembly 10 for the human-powered vehicle 2 includes a sleeve 27. The sleeve 27 is mounted on the hub shaft 12. The sleeve 27 is mounted on the shaft body 12B of the hub shaft 12. The sleeve 27 extends in the axial direction D1. The sleeve 27 is contactable with the hub shaft 12 in the radial direction D4. The sleeve 27 has a tubular shape. The sleeve 27 is in contact with the outer peripheral surface 12A of the hub shaft 12. The first bearing unit 20, the sleeve 27 and the third bearing unit 24 are retained between the first stopper 12G and the first coupling member 12C.

[0078] The sleeve 27 includes a first abutment portion 27A. The first abutment portion 27A abuts the first inner race 20A. The first abutment portion 27A of the sleeve 27 abuts the first inner race 20A in the axial direction D1. The first abutment portion 27A contacts the first inner race 20A in the axial direction D1. The first inner race 20A is held between the first stopper 12G and the first abutment portion 27A in the axial direction D1.

[0079] The sleeve 27 includes a second abutting portion 27B. The second abutting portion 27B abuts the second inner race 22A in the radial direction D4. The second abutting portion 27B contacts the second inner race 22A in the radial direction D4. The second abutting portion 27B may also be referred to as a radial abutting portion 27B. That is, the sleeve 27 includes a radial abutting portion 27B. The radial abutting portion 27B abuts the axially inward inner race 22A in the radial direction D4. The radial abutting portion 27B contacts the axially inward inner race 22A in the radial direction D4.

[0080] like Figure 6As shown, the sleeve 27 is not axially adjacent to the axially inward inner race 22A relative to the center axis A1. The sleeve 27 is not adjacent to the axially inward inner race 22A in the axial direction D1. The sleeve 27 does not contact the axially inward inner race 22A in the axial direction D1. The gap 27G is provided between the second inner race 22A and the sleeve 27 along the axial direction D1. The first abutting portion 27A is not axially adjacent to the axially inward inner race 22A relative to the center axis A1. The first abutting portion 27A is not adjacent to the axially inward inner race 22A in the axial direction D1. The first abutting portion 27A does not contact the axially inward inner race 22A in the axial direction D1. The gap 27G is provided between the second inner race 22A and the first abutting portion 27A along the axial direction D1.

[0081] In the present embodiment, the first abutting portion 27A is located at least partially radially outward from the second abutting portion 27B in the radial direction D4. However, the positional relationship between the first abutting portion 27A and the second abutting portion 27B is not limited to the illustrated embodiment.

[0082] like Figure 4 As shown, the sleeve 27 also includes a third abutting portion 27C. The third abutting portion 27C is adjacent to the third inner race 24A. The third abutting portion 27C of the sleeve 27 is adjacent to the third inner race 24A in the axial direction D1. The third abutting portion 27C of the sleeve 27 is in contact with the third inner race 24A in the axial direction D1. The third abutting portion 27C may also be referred to as an axial abutting portion 27C. That is, the sleeve 27 includes an axial abutting portion 27C. The axial abutting portion 27C is adjacent to the axially outward inner race 24A in the axial direction D1. The axial abutting portion 27C is in contact with the axially outward inner race 24A in the axial direction D1. The third inner race 24A is held between the third abutting portion 27C and the first coupling member 12C in the axial direction D1.

[0083] The sleeve 27 is not radially adjacent to the axially outward inner race 24A relative to the center axis A1. The sleeve 27 is not adjacent to the third inner race 24A in the radial direction D4. The sleeve 27 is not in contact with the third inner race 24A in the radial direction D4. The third adjacent portion 27C is not radially adjacent to the axially outward inner race 24A relative to the center axis A1. The third adjacent portion 27C is not adjacent to the third inner race 24A in the radial direction D4. The third adjacent portion 27C is not in contact with the third inner race 24A in the radial direction D4. The third inner race 24A is in contact with the outer peripheral surface 12A of the hub shaft 12.

[0084] The sleeve 27 includes a first axial end 27M and a second axial end 27N opposite to the first axial end 27M in the axial direction D1. The sleeve 27 extends between the first axial end 27M and the second axial end 27N in the axial direction D1. The first axial end 27M is positioned closer to the axial center plane CP of the hub assembly 10 in the axial direction D1 than the second axial end 27N.

[0085] The first axial end 27M includes the first abutment portion 27A. The second axial end 27N includes the third abutment portion 27C. That is, the sleeve 27 extends between the first abutment portion 27A and the third abutment portion 27C in the axial direction D1.

[0086] The first axial end 27M includes an end surface 27M1. The sleeve 27 includes an inner peripheral surface 27P. The end surface 27M1 contacts the first inner race 20A of the first bearing unit 20 in the axial direction D1. The inner peripheral surface 27P contacts the outer peripheral surface 12A of the hub axle 12. The first axial end 27M includes an inclined surface 27S. The inclined surface 27S is not perpendicular to and is not parallel to the axial direction D1. The inclined surface 27S has a radially defined inner diameter DM1. The inner diameter DM1 decreases from the end surface 27M1 to the inner peripheral surface 27P. However, if necessary or desired, the inclined surface 27S can be omitted from the first axial end 27M.

[0087] The hub axle 12 includes an additional outer peripheral surface 12P. The outer diameter of the additional outer peripheral surface 12P is greater than the outer diameter of the outer peripheral surface 12A. The first inner race 20A of the first bearing unit 20 is in contact with the additional outer peripheral surface 12P. The end surface 27M1 of the first axial end 27M is at least partially disposed radially outward from the additional outer peripheral surface 12P of the hub axle 12.

[0088] In the present embodiment, the sleeve 27 is made of a metal material. For example, the sleeve 27 is made of one of aluminum, iron and titanium. However, if necessary or desired, the sleeve 27 can be made of a non-metallic material. If necessary or desired, the sleeve 27 can be made of a metal material other than aluminum.

[0089] like Figure 7 As shown, the first abutting portion 27A has an annular shape. The second abutting portion 27B has an annular shape. The third abutting portion 27C has an annular shape. However, if necessary or desired, the first abutting portion 27A can have a shape other than an annular shape. If necessary or desired, the second abutting portion 27B can have a shape other than an annular shape. If necessary or desired, the third abutting portion 27C can have a shape other than an annular shape.

[0090] like Figure 6As shown, the hub assembly 10 further includes a one-way clutch structure 28. The one-way clutch structure 28 is disposed radially outward from the second bearing unit 22 in the radial direction D4. The one-way clutch structure 28 is disposed radially outward from the axially inward bearing unit 22 in the radial direction D4. However, the positional relationship between the one-way clutch structure 28 and the second bearing unit 22 is not limited to the illustrated embodiment.

[0091] The one-way clutch structure 28 is disposed radially outward from the sleeve 27 in the radial direction D4. The one-way clutch structure 28 is disposed radially outward from the first abutment portion 27A in the radial direction D4. The one-way clutch structure 28 is disposed radially outward from the second abutment portion 27B in the radial direction D4. The one-way clutch structure 28 is disposed radially outward from the third abutment portion 27C in the radial direction D4.

[0092] like Figure 8 As shown, the one-way clutch structure 28 is configured to restrict the sprocket support body 16 from rotating relative to the hub shell 14 about the center axis A1 along the first rotation direction D31. Therefore, in the case where the sprocket support body 16 receives the pedaling torque T1 along the first rotation direction D31, the pedaling torque T1 is transmitted from the sprocket support body 16 to the hub shell 14 along the first rotation direction D31. The one-way clutch structure 28 is configured to allow the sprocket support body 16 to rotate relative to the hub shell 14 about the center axis A1 along the second rotation direction D32. That is, the one-way clutch structure 28 is configured to allow the hub shell 14 to rotate relative to the sprocket support body 16 about the center axis A1 along the first rotation direction D31. The first rotation direction D31 is a direction opposite to the second rotation direction D32.

[0093] like Figure 8 As shown, the hub shell 14 includes at least one first tooth 30. The hub shell 14 includes a tubular portion 32. In the present embodiment, the hub shell 14 includes at least two first teeth 30. However, the total number of the at least one first tooth 30 is not limited to the illustrated embodiment.

[0094] The sprocket support body 16 includes a first spline 34. The first spline 34 includes at least one first spline tooth 34A. In the present embodiment, the first spline 34 includes at least two first spline teeth 34A. However, the total number of at least one first spline tooth 34A is not limited to the illustrated embodiment.

[0095] like Fig. 9As shown, at least one first tooth 30 extends radially inward from the tubular portion 32. At least two first teeth 30 extend radially inward from the tubular portion 32. The sprocket support body 16 includes a base portion 16A. For example, the base portion 16A has an annular shape. The first spline 34 is arranged radially outside the base portion 16A. At least one first spline tooth 34A extends radially outward from the base portion 16A. At least two first spline teeth 34A extend radially outward from the base portion 16A. The shape of the base portion 16A is not limited to an annular shape.

[0096] like Figure 8 As shown, the one-way clutch structure 28 includes a first ratchet member 36 and a second ratchet member 37. The first ratchet member 36 is configured to engage with one of the hub housing 14 and the sprocket support body 16. The second ratchet member 37 is configured to engage with the other of the hub housing 14 and the sprocket support body 16. One of the first ratchet member 36 and the second ratchet member 37 is configured to be movable relative to the other of the first ratchet member 36 and the second ratchet member 37 in the axial direction D1. In the present embodiment, the first ratchet member 36 is configured to engage with the sprocket support body 16. The second ratchet member 37 is configured to engage with the hub housing 14. However, if necessary or desired, the first ratchet member 36 may be configured to engage with the hub housing 14. If necessary or desired, the second ratchet member 37 may be configured to engage with the sprocket support body 16.

[0097] The first ratchet member 36 includes a second spline 38. The second spline 38 is configured to engage with the first spline 34. The second spline 38 includes at least one second spline tooth 38A. In the present embodiment, the second spline 38 includes at least two second spline teeth 38A. However, the total number of at least one second spline tooth 38A is not limited to the illustrated embodiment.

[0098] like Fig. 9 As shown, the first spline 34 and the second spline 38 are engaged to transfer rotational force between the sprocket support body 16 and the first ratchet member 36. At least one first spline tooth 34A and at least one second spline tooth 38A are meshed to transfer rotational force between the sprocket support body 16 and the first ratchet member 36. At least two first spline teeth 34A and at least two second spline teeth 38A are meshed to transfer rotational force between the sprocket support body 16 and the first ratchet member 36.

[0099] The first ratchet member 36 includes a first base portion 36A. For example, the first base portion 36A has an annular shape. The second spline 38 is disposed radially inwardly of the first base portion 36A. At least one second spline tooth 38A extends radially inwardly from the first base portion 36A. At least two second spline teeth 38A extend radially inwardly from the first base portion 36A. The shape of the first base portion 36A is not limited to the illustrated embodiment.

[0100] like Figure 8 As shown, the second ratchet member 37 includes at least one second tooth 42. In the present embodiment, the second ratchet member 37 includes at least two second teeth 42. However, the total number of the at least one second tooth 42 is not limited to the illustrated embodiment.

[0101] like Fig. 9 As shown, the second ratchet member 37 includes a second base portion 37A. For example, the second base portion 37A has an annular shape. At least one second tooth 42 extends radially outward from the second base portion 37A. At least two second teeth 42 extend radially outward from the second base portion 37A. The shape of the second base portion 37A is not limited to the illustrated embodiment.

[0102] At least one second tooth 42 is configured to engage with at least one first tooth 30. The at least one first tooth 30 and the at least one second tooth 42 are meshed to transmit the rotational force between the hub shell 14 and the second ratchet member 37. At least two second teeth 42 are configured to engage with at least two first teeth 30. The at least two first teeth 30 and the at least two second teeth 42 are meshed to transmit the rotational force between the hub shell 14 and the second ratchet member 37.

[0103] like Fig.10 As shown, the first ratchet member 36 includes at least one first ratchet tooth 44. The at least one first ratchet tooth 44 protrudes from the first base portion 36A toward the second ratchet member 37. In the present embodiment, the first ratchet member 36 includes at least two first ratchet teeth 44. The at least two first ratchet teeth 44 protrude from the first base portion 36A toward the second ratchet member 37. However, the total number of the at least one first ratchet tooth 44 is not limited to the illustrated embodiment.

[0104] like Fig.11 As shown, the second ratchet member 37 includes at least one second ratchet tooth 46. The at least one second ratchet tooth 46 protrudes from the second base portion 37A toward the first ratchet member 36. In the present embodiment, the second ratchet member 37 includes at least two second ratchet teeth 46. The at least two second ratchet teeth 46 protrude from the second base portion 37A toward the first ratchet member 36. However, the total number of the at least one second ratchet tooth 46 is not limited to the illustrated embodiment.

[0105] like Figure 6As shown, at least one second ratchet tooth 46 is configured to engage with at least one first ratchet tooth 44. At least one first ratchet tooth 44 and at least one second ratchet tooth 46 are configured to mesh to transfer rotational force between the first ratchet member 36 and the second ratchet member 37. At least two second ratchet teeth 46 are configured to engage with at least two first ratchet teeth 44. At least two first ratchet teeth 44 and at least two second ratchet teeth 46 are configured to mesh to transfer rotational force between the first ratchet member 36 and the second ratchet member 37.

[0106] The one-way clutch structure 28 includes a biasing member 47. That is, the hub assembly 10 for the human-powered vehicle 2 includes a biasing member 47. The biasing member 47 is disposed between the hub housing 14 and the first ratchet member 36 along the axial direction D1 to bias the first ratchet member 36 toward the second ratchet member 37 along the axial direction D1. The axial direction D1 includes a first axial direction D11 and a second axial direction D12. The second axial direction D12 is a direction opposite to the first axial direction D11. The biasing member 47 is configured to bias the first ratchet member 36 toward the second ratchet member 37 along the first axial direction D11. In the present embodiment, the biasing member 47 includes a spring. However, if necessary or desired, the biasing member 47 may include another member other than a spring.

[0107] The hub assembly 10 for the human-powered vehicle 2 includes a receiving member 48. The receiving member 48 is disposed between the first ratchet member 36 and the biasing member 47 in the axial direction D1. The receiving member 48 is pressed against the first ratchet member 36 by the biasing member 47. The receiving member 48 slidably contacts the first ratchet member 36.

[0108] like Fig.12 As shown, the first spline 34 includes a helical spline. The second spline 38 includes a helical spline. The first spline tooth 34A has a helical shape. The second spline tooth 38A has a helical shape. When the pedaling torque T1 is input to the sprocket support body 16 in the first rotational direction D31, at least one second spline tooth 38A is guided by at least one first spline tooth 34A in the first axial direction D11 relative to the sprocket support body 16. Figure 6 As shown, this causes at least two first ratchet teeth 44 to be firmly engaged with at least two second ratchet teeth 46. In this state, the pedaling torque T1 (see, for example, Fig.12 ) from the sprocket support 16 via the first ratchet member 36 and the second ratchet member 37 ( Figure 6 ) is transmitted to the hub shell 14 ( Figure 6 ).

[0109] like Fig.13As shown, the first spline 34 includes at least one guide portion 34G. The guide portion 34G extends from at least one of the first spline teeth 34A in the circumferential direction D2. The at least one guide portion 34G is configured to move the first ratchet member 36 away from the second ratchet member 37 in the second axial direction D12 during sliding or freewheeling. The at least one guide portion 34G is configured to move the first ratchet member 36 against the biasing force of the biasing member 47 during sliding or freewheeling. Figure 8 As shown, this allows the hub housing 14 and the second ratchet member 37 to rotate relative to the sprocket support 16 and the first ratchet member 36 in the first rotational direction D31.

[0110] The rotation of the sprocket support body 16 and the sprocket assembly 4 is stopped during coasting because the rotation of the crank is stopped when the human-powered vehicle 2 is moving forward. During coasting, the wheel coupled to the hub housing 14 rotates in the first rotational direction D31, while the rotation of the sprocket support body 16 and the sprocket assembly 4 is stopped. When the hub housing 14 rotates in the first rotational direction D31 relative to the sprocket support body 16, the at least one guide portion 34G and the at least one first spline tooth 34A guide the at least one second spline tooth 38A in the second axial direction D12. Therefore, the first ratchet member 36 moves relative to the second ratchet member 37 in the second axial direction D12 against the biasing force of the biasing member 47 during coasting, thereby reducing the engagement between the first ratchet tooth 44 and the second ratchet tooth 46. This allows the second ratchet member 37 to rotate relative to the first ratchet member 36 in the first rotational direction D31, while the at least one first ratchet tooth 44 of the first ratchet member 36 slides with the at least one second ratchet tooth 46 of the second ratchet member 37. Therefore, the hub shell 14 is rotatable in the first rotation direction D31 relative to the sprocket support 16 during sliding.

[0111] like Fig.11 As shown, in the present embodiment, the guide portion 34G is integrally provided with the first spline tooth 34A as a one-piece unitary member. However, if necessary or desired, the guide portion 34G may be a separate member from the first spline tooth 34A.

[0112] like Fig.14 As shown, the hub assembly 10 includes a friction member 49. The friction member 49 is disposed between the second ratchet member 37 and the sprocket support body 16. The friction member 49 slidably contacts the second ratchet member 37 and the sprocket support body 16. The biasing member 47 is configured to bias the receiving member 48, the first ratchet member 36, the second ratchet member 37, and the friction member 49 toward the sprocket support body 16 in the axial direction D1.

[0113] The hub assembly 10 for a human-powered vehicle includes a spacer 50. The spacer 50 includes at least one base member 52 and at least one axial protrusion 54. The at least one base member 52 extends in the circumferential direction D2. The at least one axial protrusion 54 extends from the at least one base member 52 in the axial direction D1.

[0114] In the present embodiment, the spacer 50 includes a base member 52 and at least two axial protrusions 54. The base member 52 has an annular shape. The at least two axial protrusions 54 extend from the base member 52 in the axial direction D1. However, the total number of at least one base member 52 is not limited to the illustrated embodiment. The total number of at least one axial protrusion 54 is not limited to the illustrated embodiment. If necessary or desired, the spacer 50 may include at least two base members 52 arranged circumferentially around the central axis A1. In this variation, for example, each of the at least two base members 52 has an arc shape.

[0115] like Figure 8 As shown, at least one axial protrusion 54 is at least partially disposed between at least one first tooth 30 and at least one second tooth 42 in the circumferential direction D2. The axial protrusion 54 is at least partially disposed between the first tooth 30 and the second tooth 42 in the circumferential direction D2. The axial protrusion 54 is completely disposed between the first tooth 30 and the second tooth 42 in the circumferential direction D2. However, if needed or desired, the axial protrusion 54 may be partially disposed between the first tooth 30 and the second tooth 42 in the circumferential direction D2.

[0116] In the present embodiment, the spacer 50 is made of a non-metallic material. The spacer 50 is made of a resin material. However, if necessary or desired, the spacer 50 may be made of a material other than a resin material. If necessary or desired, the spacer 50 may be omitted from the hub assembly 10.

[0117] like Fig.14 As shown, the hub assembly 10 further includes a support member 60. The support member 60 is configured to push the spacer 50 toward the second ratchet member 37 in the axial direction D1. The support member 60 is coupled to the second ratchet member 37 to restrict the spacer 50 from moving relative to the second ratchet member 37 in the axial direction D1.

[0118] The hub assembly 10 for the human-powered vehicle 2 includes a sealing member 70. The hub assembly 10 for the human-powered vehicle 2 includes a stopper 79. The stopper 79 is coupled to the hub shell 14 to hold the sealing member 70 between the hub shell 14 and the stopper 79. The stopper 79 is detachably and reattachably coupled to the hub shell 14.

[0119] The hub assembly 10 also includes a dust cover 80. The dust cover 80 is configured to be mounted to the sprocket support body 16. The hub assembly 10 also includes a cover stopper 82. The cover stopper 82 is coupled to the sprocket support body 16 to retain the dust cover 80 between the sprocket support body 16 and the cover stopper 82. The cover stopper 82 is detachably and reattachably coupled to the sprocket support body 16.

[0120] The one-way clutch structure 28 may have Figures 6 to 13 Another structure than the one shown.

[0121] In this application, the term "comprising" and its derivatives used herein are intended to be open terms, indicating the presence of the features, elements, components, groups, integers and / or steps, but not excluding the presence of other undescribed features, elements, components, groups, integers and / or steps. This concept also applies to words with similar meanings, such as the terms "including", "having" and their derivatives.

[0122] The terms “member,” “section,” “portion,” “part,” “element,” “body,” and “structure” when used in the singular can have the dual meaning of a single part or at least two parts.

[0123] Ordinal numbers such as “first” and “second” in the present application are merely identifications and do not have any other meanings, for example, a specific order, etc. In addition, for example, the term “first element” itself does not imply the existence of a “second element”, and the term “second element” itself does not imply the existence of a “first element”.

[0124] The term “a pair” as used herein may encompass a configuration in which the paired elements have shapes or structures different from each other, in addition to a configuration in which the paired elements have the same shape or structure as each other.

[0125] The terms "a" (or an), "one or more" and "at least one" can be used interchangeably herein.

[0126] The phrase “at least one of…” used in the present disclosure refers to “one or more” of the desired choices. For one example, if the number of choices is two, the phrase “at least one of…” used in the present disclosure means “only one single choice” or “both of the two choices”. For other examples, if the number of choices is equal to or greater than three, the phrase “at least one of…” used in the present disclosure means “only one single choice” or “any combination of equal to or greater than two choices”. For example, the phrase “at least one of A and B” covers (1) A alone, (2) B alone, and (3) both A and B. The phrase “at least one of A, B, and C” includes (1) A alone, (2) B alone, (3) C alone, (4) both A and B, (5) both B and C, (6) both A and C, and (7) all of A, B, and C. In other words, in the present disclosure, the phrase “at least one of A and B” does not mean “at least one A and at least one B”.

[0127] Finally, the degree terms such as "substantially", "approximately" and "approximately" used in this article refer to the reasonable deviation amount of the modified term so that the end result is not significantly changed. All numerical values ​​described in this application can be interpreted as including terms such as "substantially", "approximately" and "approximately".

[0128] Obviously, many modifications and variations of the present invention are possible in light of the above teachings.It is therefore to be understood that within the scope of the appended claims, the present invention may be practiced otherwise than as specifically described herein.

Claims

1. A hub assembly for a human-driven vehicle, the hub assembly comprising: a hub axle having a central axis defining an axial direction, a radial direction, and a circumferential direction; a hub shell rotatably mounted on the hub axle for rotation about the central axis; a sprocket support body, the sprocket support body being rotatably mounted on the hub axle to rotate about the central axis, the sprocket support body being configured to support at least one sprocket; a first bearing unit, the first bearing unit being arranged between the hub shaft and the hub shell in the radial direction; a second bearing unit, the second bearing unit being arranged between the hub shaft and the sprocket support body in the radial direction; a sleeve, the sleeve being mounted on the hub axle and extending in the axial direction, the sleeve being contactable with the hub axle in the radial direction; The first bearing unit comprises: a first inner race coupled to the hub axle; a first outer race coupled to the hub shell; and at least two first rolling members, the at least two first rolling members being arranged between the first inner race and the first outer race in the radial direction; The second bearing unit comprises: a second inner race coupled to the hub axle; a second outer race coupled to the sprocket support body; and at least two second rolling members, the at least two second rolling members being arranged between the second inner race and the second outer race in the radial direction; and The sleeve comprises: a first abutment portion abutting the first inner race; and A second abutting portion abuts against the second inner race in the radial direction.

2. The hub assembly according to claim 1, wherein The first abutment portion of the sleeve abuts the first inner race in the axial direction.

3. The hub assembly according to claim 1, further comprising: A third bearing unit is provided between the hub shaft and the sprocket support body in the radial direction, wherein The third bearing unit comprises: a third inner race coupled to the hub axle; a third outer race coupled to the sprocket support; and at least two third rolling members, the at least two third rolling members being arranged between the third inner race and the third outer race in the radial direction, and The sleeve further includes a third abutting portion abutting the third inner race.

4. The hub assembly according to claim 3, wherein The third abutment portion of the sleeve abuts the third inner race in the axial direction.

5. The hub assembly according to claim 1, wherein The first abutment portion is located at least partially radially outward from the second abutment portion in the radial direction.

6. The hub assembly according to claim 3, wherein The sleeve comprises a first axial end and a second axial end opposite to the first axial end in the axial direction, The first axial end includes the first abutment portion, and The second axial end includes the third abutment portion.

7. The hub assembly according to claim 6, wherein The first axial end is located closer to an axial center plane of the hub assembly in the axial direction than the second axial end.

8. The hub assembly according to claim 1, wherein The sleeve is made of metal material.

9. The hub assembly according to claim 1, further comprising: A one-way clutch structure is disposed radially outward from the second bearing unit in the radial direction.

10. The hub assembly according to claim 9, wherein The one-way clutch structure comprises: a first ratchet member configured to engage one of the hub housing and the sprocket support; and a second ratchet member configured to engage the other of the hub housing and the sprocket support; and One of the first ratchet member and the second ratchet member is configured to be movable relative to the other of the first ratchet member and the second ratchet member in the axial direction.

11. A hub assembly for a human-driven vehicle, the hub assembly comprising: a hub axle having a central axis defining an axial direction, a radial direction, and a circumferential direction; a hub shell rotatably mounted on the hub axle for rotation about the central axis; a sprocket support body rotatably mounted on the hub axle to rotate about the central axis, the sprocket support body being configured to support at least one sprocket; an axially outward bearing unit, the axially outward bearing unit being arranged between the hub shaft and the sprocket support body in the radial direction; an axially inward bearing unit, the axially inward bearing unit being disposed between the hub shaft and the sprocket support body in the radial direction, the axially inward bearing unit being disposed closer to an axial center plane of the hub assembly in the axial direction than the axially outward bearing unit; a sleeve, the sleeve being mounted on the hub axle and extending in the axial direction, the sleeve being contactable with the hub axle in the radial direction; The axially outward bearing unit comprises: an axially outward inner race coupled to the hub axle; an axially outward outer race coupled to the sprocket support body; and at least two axially outward rolling members, the at least two axially outward rolling members being arranged between the axially outward inner race and the axially outward outer race in the radial direction; The axially inward bearing unit comprises: an axially inward inner race coupled to the hub axle; Axially inner and outer races coupled to the sprocket support body; and at least two axially inward rolling members, the at least two axially inward rolling members being arranged between the axially inward inner race and the axially inward inner race in the radial direction; The sleeve comprises: an axially abutting portion, the axially abutting portion being abutted with the axially outward inner race in the axial direction; and a radially abutting portion, the radially abutting portion being abutted in the radial direction to the axially inward inner race; and The sleeve is not radially adjacent to the axially outward inner race relative to the central axis.

12. The hub assembly according to claim 11, wherein The sleeve is made of metal material.

13. The hub assembly according to claim 11, further comprising: A one-way clutch structure is disposed radially outward from the axially inward bearing unit in the radial direction.

14. The hub assembly according to claim 13, wherein The one-way clutch structure comprises: a first ratchet member configured to engage one of the hub housing and the sprocket support; and a second ratchet member configured to engage the other of the hub housing and the sprocket support; and One of the first ratchet member and the second ratchet member is configured to be movable relative to the other of the first ratchet member and the second ratchet member in the axial direction.

15. A hub assembly for a human-driven vehicle, the hub assembly comprising: a hub axle having a central axis defining an axial direction, a radial direction, and a circumferential direction; a hub shell rotatably mounted on the hub axle for rotation about the central axis; a sprocket support body rotatably mounted on the hub axle to rotate about the central axis, the sprocket support body being configured to support at least one sprocket; an axially outward bearing unit, the axially outward bearing unit being arranged between the hub shaft and the sprocket support body in the radial direction; an axially inward bearing unit, the axially inward bearing unit being disposed between the hub shaft and the sprocket support body in the radial direction, the axially inward bearing unit being disposed closer to an axial center plane of the hub assembly in the axial direction than the axially outward bearing unit; a sleeve, the sleeve being mounted on the hub axle and extending in the axial direction, the sleeve being contactable with the hub axle in the radial direction; The axially outward bearing unit comprises: an axially outward inner race coupled to the hub axle; an axially outward outer race coupled to the sprocket support body; and at least two axially outward rolling members, the at least two axially outward rolling members being arranged in the radial direction between the axially outward inner race and the axially outward outer race, and The axially inward bearing unit comprises: an axially inward inner race coupled to the hub axle; Axially inner and outer races coupled to the sprocket support body; and at least two axially inward rolling members, the at least two axially inward rolling members being arranged between the axially inward inner race and the axially inward inner race in the radial direction; the sleeve comprising: an axially abutting portion, the axially abutting portion being abutted with the axially outward inner race in the axial direction; and a radially abutting portion, the radially abutting portion being abutted in the radial direction to the axially inward inner race; and The sleeve is not axially adjacent to the axially inward inner race relative to the central axis.

16. The hub assembly according to claim 15, wherein The sleeve is not radially adjacent to the axially outward inner race relative to the central axis.

17. The hub assembly according to claim 15, wherein The sleeve is made of metal material.

18. The hub assembly according to claim 15, further comprising: A one-way clutch structure is disposed radially outward from the axially inward bearing unit in a radial direction.

19. The hub assembly according to claim 18, wherein The one-way clutch structure comprises: a first ratchet member configured to engage one of the hub housing and the sprocket support; and a second ratchet member configured to engage the other of the hub housing and the sprocket support; and One of the first ratchet member and the second ratchet member is configured to be movable relative to the other of the first ratchet member and the second ratchet member in the axial direction.

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