JP2024059915A - Hubs for human-powered vehicles - Google Patents

Abstract

[Problem] To provide a stronger hub for a human-powered vehicle. [Solution] The hub is a hub for a human-powered vehicle, and includes a shaft member and a rotor that is provided coaxially with the shaft member so as to rotate relative to the shaft member, the shaft member having a minimum inner diameter and a maximum outer diameter, the minimum inner diameter being set to 4.5 mm to 5.5 mm, and the maximum outer diameter being set in a range of 230% or more of the minimum inner diameter. [Selected Figure] Figure 1

Description

The present invention relates to a hub for a human-powered vehicle.

Patent document 1 discloses an example of a hub for a human-powered vehicle. The hub in patent document 1 includes a shaft member and a rotor that is arranged coaxially with the shaft member so as to rotate relative to the shaft member.

JP 2013-46538 A

There is a need to provide stronger hubs for human-powered vehicles.

A hub for a human-powered vehicle according to a first aspect of the present invention is a hub for a human-powered vehicle comprising a shaft member and a rotating body arranged coaxially with the shaft member so as to rotate relative to the shaft member, the shaft member having a minimum inner diameter and a maximum outer diameter, the minimum inner diameter being set to 4.5 mm to 5.5 mm, and the maximum outer diameter being set in a range of 230% or more of the minimum inner diameter.
According to the hub for a human-powered vehicle of the first aspect, the maximum outer diameter falls within the above range, and therefore the strength is high.

In a hub for a human-powered vehicle having a second side according to the first side, the maximum outer diameter is set in a range of 365% or less of the minimum inner diameter.
According to the hub for a human-powered vehicle of the second aspect, the maximum outer diameter falls within the above range, so that the radial dimension of the shaft member is unlikely to become large.

A hub for a human-powered vehicle according to a third aspect of the present invention is a hub for a human-powered vehicle comprising a shaft member and a rotating body arranged coaxially with the shaft member so as to rotate relative to the shaft member, the shaft member having a minimum inner diameter and a maximum outer diameter, the minimum inner diameter being set to 11.5 mm to 12.5 mm, and the maximum outer diameter being set in a range of 130% or more of the minimum inner diameter.
According to the hub for a human-powered vehicle of the third aspect, the maximum outer diameter falls within the above range, and therefore the strength is high.

In a hub for a human-powered vehicle of a fourth side according to the third side, the maximum outer diameter is set in a range of 155% or less of the minimum inner diameter.
According to the hub for a human-powered vehicle of the fourth aspect, since the maximum outer diameter falls within the above range, the radial dimension of the shaft member is unlikely to become large.

A hub for a human-powered vehicle according to a fifth aspect of the present invention is a hub for a human-powered vehicle comprising a shaft member and a rotating body arranged coaxially with the shaft member so as to rotate relative to the shaft member, the shaft member including at least one of a first shaft member at least partially inserted into the rotating body and a second shaft member at least partially inserted into the rotating body, the first shaft member having a minimum inner diameter and a maximum outer diameter and the second shaft member having a minimum inner diameter and a maximum outer diameter, the minimum inner diameter of the first shaft member is different from the minimum inner diameter of the second shaft member, the maximum outer diameter of the first shaft member is different from the maximum outer diameter of the second shaft member, and the rotating body is configured so that the first shaft member and the second shaft member can be selectively inserted.
According to the hub for a human-powered vehicle of the fifth aspect, a plurality of shaft members can be selectively used for one rotating body, thereby improving productivity.

A hub for a human-powered vehicle according to a sixth aspect of the present invention is a hub for a human-powered vehicle comprising a shaft member and a rotating body arranged coaxially with the shaft member so as to rotate relative to the shaft member, the shaft member including an inserted portion that is inserted into the rotating body, the inserted portion including a first portion and a second portion having an outer diameter larger than the first portion.
According to the hub for a human-powered vehicle of the sixth aspect, since it includes the second portion, it has high strength.

In a hub for a human-powered vehicle having a seventh side according to the sixth side, the shaft member has a minimum inner diameter and the first portion of the shaft member has a first maximum outer diameter, the minimum inner diameter being 14.5 mm to 15.5 mm, and the first maximum outer diameter being set in a range of 120% or more of the minimum inner diameter.
According to the hub for a human-powered vehicle of the seventh aspect, the first maximum outer diameter falls within the above range, and therefore the strength is high.

In a hub for a human-powered vehicle having an eighth side according to the seventh side, the first maximum outer diameter is set in a range of 125% or less of the minimum inner diameter.
According to the hub for a human-powered vehicle of the eighth aspect, since the first maximum outer diameter falls within the above range, the radial dimension of the shaft member is unlikely to become large.

In a hub for a human-powered vehicle of a ninth side according to any one of the sixth to eighth sides, the shaft member has a minimum inner diameter and the second portion of the shaft member has a second maximum outer diameter, the minimum inner diameter being 14.5 mm to 15.5 mm, and the second maximum outer diameter being set in a range of 130% or more of the minimum inner diameter.
According to the hub for a human-powered vehicle of the ninth aspect, the second maximum outer diameter falls within the above range, so that the strength is high.

In a hub for a human-powered vehicle of a tenth aspect according to the ninth aspect, the second maximum outer diameter is set in a range of 140% or less of the minimum inner diameter.
According to the hub for a human-powered vehicle of the tenth aspect, since the second maximum outer diameter is within the above range, the radial dimension of the shaft member is unlikely to become large.

In a hub for a human-powered vehicle having an eleventh side according to any one of the sixth to tenth sides, a bearing is further provided for rotatably supporting the rotating body on the shaft member, the bearing including a ball bearing provided on the shaft member, a ball support provided on the rotating body, and a plurality of spheres arranged between the ball bearing and the ball support.
According to the hub for a human-powered vehicle of the eleventh aspect, the rotating body can be rotated suitably relative to the shaft member.

In a hub for a human-powered vehicle having a twelfth side according to the eleventh side, the bearing has a protrusion that prevents foreign matter from entering the rotating body.
According to the hub for a human-powered vehicle of the twelfth aspect, the number of parts can be reduced.

In a hub for a human-powered vehicle having a thirteenth side surface following the twelfth side surface, the projection is configured to protrude radially outward from the shaft member.
According to the hub for a human-powered vehicle of the thirteenth aspect, it is possible to effectively prevent foreign matter from entering the rotating body.

The hub for a human-powered vehicle of a fourteenth side according to any one of the first to thirteenth sides further comprises a power generation mechanism disposed between the shaft member and the rotating body.
According to the hub for a human-powered vehicle of the fourteenth aspect, convenience can be improved.

In a hub for a human-powered vehicle of a fifteenth aspect according to the fourteenth aspect, the power generation mechanism includes a stator provided on the shaft member, and a magnet provided on the rotating body.
According to the hub for a human-powered vehicle of the fifteenth aspect, a simple structure can be achieved.

The hub of the present invention provides greater strength.

FIG. 2 is a cross-sectional view of a hub for a human-powered vehicle according to the first embodiment. FIG. 2 is a cross-sectional view of a hub for a human-powered vehicle according to the first embodiment. FIG. 2 is a perspective view of a first shaft member shown in FIG. 1 . FIG. 3 is a perspective view of the second shaft member of FIG. 2 . FIG. 2 is an exploded perspective view of the stator and magnet of FIG. 1 . FIG. 11 is a cross-sectional view of a hub for a human-powered vehicle according to a second embodiment. FIG. 7 is a perspective view of the shaft member of FIG. 6 . 8 is a partial cross-sectional view of a state in which a third positioning member is attached to the shaft member of FIG. 7; FIG. FIG. 7 is a perspective view of the cone pusher of FIG. 6 . 10 is a cross-sectional view taken along line D10-D10 in FIG. 9 .

The term "at least one" as used herein means "one or more" of the desired options. As an example, the term "at least one" as used herein means "only one option" or "both of two options" if the number of options is two. As another example, the term "at least one" as used herein means "only one option" or "any combination of two or more options" if the number of options is three or more.

In the first and second embodiments, the human-powered vehicle means a vehicle that uses human power at least partially as a driving force for traveling, and includes vehicles that electrically assist human power. Vehicles that use only a driving force other than human power are not included in the human-powered vehicle. In particular, vehicles that use only an internal combustion engine as a driving force are not included in the human-powered vehicle. Typically, a human-powered vehicle is assumed to be a small, light vehicle, and a vehicle that does not require a license to drive on public roads is assumed. In one example, the human-powered vehicle is a bicycle (e-bike) that includes an assist device that uses electric energy to assist the propulsion of the human-powered vehicle. More specifically, it is a city cycle. The configuration of the human-powered vehicle can be changed as desired. The human-powered vehicle can be configured without the assist device. In other words, the human-powered vehicle may be a normal bicycle that is driven only by human driving force. The type of the human-powered vehicle may be a road bike, a mountain bike, or a cross bike.

First Embodiment
A hub 10 for a human-powered vehicle will be described with reference to FIGS. 1 to 5. Hereinafter, the hub 10 for a human-powered vehicle may be referred to as the hub 10. The hub 10 is configured as, for example, a hub dynamo. The hub 10 is a hub 10 for a human-powered vehicle, and includes a shaft member 12 and a rotating body 14 that is provided coaxially with the shaft member 12 so as to rotate relative to the shaft member 12. The hub 10 preferably further includes a power generation mechanism 16 that is disposed between the shaft member 12 and the rotating body 14. The hub 10 preferably further includes an intermediate member 18, a first bearing 20, a second bearing 22, a first positioning member 24, and a second positioning member 26. The shaft member 12 includes at least one of a first shaft member 28 that is at least partially inserted into the rotating body 14 as shown in FIG. 1, and a second shaft member 30 that is at least partially inserted into the rotating body 14 as shown in FIG. 2. The rotating body 14 is configured so that the first shaft member 28 and the second shaft member 30 are selectively inserted into it. The hub 10 is configured so that the first shaft member 28 and the second shaft member 30 can be selectively inserted into the rotating body 14 by using common parts other than the first shaft member 28 and the second shaft member 30. Hereinafter, the first shaft member 28 and the second shaft member 30 may be referred to as shaft members 12.

The shaft member 12 is, for example, a hub axle. The shaft member 12 is, for example, cylindrical. The rotating body 14 is, for example, a hub shell. The rotating body 14 has a flange 14A on its outer periphery for connecting with spokes of a front wheel or a rear wheel. The rotating body 14 is, for example, cylindrical. The intermediate member 18 is, for example, cylindrical. The shaft member 12 is inserted into the intermediate member 18. The intermediate member 18 includes a first intermediate member 18A and a second intermediate member 18B. The first intermediate member 18A is disposed between the first bearing 20 and the first positioning member 24 in the axial direction of the shaft member 12. The second intermediate member 18B is disposed between the second bearing 22 and the second positioning member 26 in the axial direction of the shaft member 12.

The first bearing 20 and the second bearing 22 support the rotating body 14 rotatably relative to the shaft member 12. The first bearing 20 and the second bearing 22 are provided between the inner periphery of the rotating body 14 and the outer periphery of the shaft member 12. The first bearing 20 is provided at a position close to one end of the shaft member 12 in the axial direction. The second bearing 22 is provided at a position close to the other end of the shaft member 12 in the axial direction.

The first positioning member 24 is formed, for example, in an annular shape. The first positioning member 24 is attached to the shaft member 12 so as not to rotate relative to the shaft member 12. The first positioning member 24 is attached to one end of the stator 16A of the power generation mechanism 16 in the axial direction of the shaft member 12. The first positioning member 24 restricts the axial movement of the stator 16A. The second positioning member 26 is formed, for example, in an annular shape. The second positioning member 26 is attached to the shaft member 12 so as not to rotate relative to the shaft member 12. The second positioning member 26 is attached to the other end of the stator 16A in the axial direction of the shaft member 12. The second positioning member 26 restricts the axial movement of the stator 16A. The second positioning member 26 is thinner than the first positioning member 24.

1 and 3, the first shaft member 28 has an inserted portion 28A that is inserted into the rotor 14, and a reduced diameter portion 28B that protrudes from the end of the inserted portion 28A. The inserted portion 28A has a larger maximum outer diameter than the reduced diameter portion 28B. As shown in FIG. 1, the reduced diameter portion 28B is supported non-rotatably on the frame F of the human-powered vehicle. The first shaft member 28 is detachably fixed to the frame F by, for example, a quick release mechanism 28X. As shown in FIG. 3, a groove 28C extending in the axial direction is provided on the outer circumferential surface of the first shaft member 28. The groove 28C accommodates electrical wiring extending from the coil 36 of the stator 16A.

2 and 4, the second shaft member 30 has an inserted portion 30A that is inserted into the rotor 14, and a reduced diameter portion 30B that protrudes from the end of the inserted portion 30A. The inserted portion 30A has a larger maximum outer diameter than the reduced diameter portion 30B. A groove 30C extending in the axial direction is provided on the outer circumferential surface of the second shaft member 30. The groove 30C houses electrical wiring extending from the coil 36 of the stator 16A.

The shaft member 12 has a minimum inner diameter and a maximum outer diameter. In detail, as shown in FIG. 1, the first shaft member 28 has a minimum inner diameter LA and a maximum outer diameter LB. The minimum inner diameter LA is the smallest inner diameter of the reduced diameter portion 28B. The maximum outer diameter LB is the largest outer diameter of the inserted portion 28A. The minimum inner diameter LA is set to 4.5 mm to 5.5 mm. The maximum outer diameter LB is set to a range of 230% or more of the minimum inner diameter LA. The ratio of the maximum outer diameter LB to the minimum inner diameter LA can be selected arbitrarily. The maximum outer diameter LB is preferably set to a range of 365% or less of the minimum inner diameter LA.

2, the second shaft member 30 has a minimum inner diameter LC and a maximum outer diameter LD. The minimum inner diameter LC is the minimum inner diameter of the reduced diameter portion 30B. The maximum outer diameter LD is the maximum outer diameter of the inserted portion 30A. The minimum inner diameter LC is set to 11.5 mm to 12.5 mm. The maximum outer diameter LD is set in a range of 130% or more with respect to the minimum inner diameter LC. The ratio of the maximum outer diameter LD to the minimum inner diameter LC can be selected arbitrarily. The maximum outer diameter LD is preferably set in a range of 155% or less with respect to the minimum inner diameter LC. The minimum inner diameter LA of the first shaft member 28 is different from the minimum inner diameter LC of the second shaft member 30. The maximum outer diameter LB of the first shaft member 28 is different from the maximum outer diameter LD of the second shaft member 30. The maximum outer diameter LB of the first shaft member 28 and the maximum outer diameter LD of the second shaft member 30 may be the same. Even if the maximum outer diameter LB is the same as the maximum outer diameter LD, the maximum outer diameter LB is set to a range of 230% or more relative to the minimum inner diameter LA. Even if the maximum outer diameter LD is the same as the maximum outer diameter LB, the maximum outer diameter LD is set to a range of 130% or more relative to the minimum inner diameter LC.

The power generation mechanism 16 includes a stator 16A provided on one of the shaft member 12 and the rotor 14, and a magnet 16B provided on the other of the shaft member 12 and the rotor 14. In this embodiment, the power generation mechanism 16 includes a stator 16A provided on the shaft member 12, and a magnet 16B provided on the rotor 14.

The stator 16A is mounted on the outer periphery of the shaft member 12 so as not to rotate relative to the shaft member 12. The stator 16A has a first yoke 32, a second yoke 34, and a coil 36. The stator 16A further includes a bobbin 38 around which the coil 36 is wound.

As shown in FIG. 5, the first yoke 32 includes at least one first yoke piece 40. The first yoke 32 includes two or more first yoke pieces 40 arranged in the circumferential direction of the shaft member 12. The first yoke 32 includes, for example, 18 first yoke pieces 40. The first yoke pieces 40 are arranged at equal intervals in the circumferential direction of the shaft member 12. The first yoke pieces 40 are fitted into recesses 38A provided in the bobbin 38, thereby maintaining their relative positions.

The second yoke 34 includes at least one second yoke piece 42. The second yoke 34 includes two or more second yoke pieces 42 arranged in the circumferential direction of the shaft member 12. The second yoke 34 includes, for example, 18 second yoke pieces 42. The second yoke pieces 42 are formed separately from the first yoke piece 40. The material of the first yoke piece 40 and the material of the second yoke piece 42 are preferably the same. The first yoke piece 40 and the second yoke piece 42 preferably have the same shape. The number of first yoke pieces 40 and the number of second yoke pieces 42 are equal. The second yoke pieces 42 are arranged at equal intervals in the circumferential direction of the shaft member 12. The second yoke pieces 42 are fitted into recesses 38A provided in the bobbin 38 to maintain their relative positions.

The magnet 16B is provided on the rotor 14 so that the poles are aligned in the circumferential direction. The magnet 16B is provided on the inner circumference of the rotor 14 so that it cannot rotate relative to the rotor 14. As shown in FIG. 5, the magnet 16B has a first magnet 44 and a second magnet 46. The first magnet 44 is formed by attaching multiple magnets 44A to the inner circumference of a cylindrical first support member 48. The second magnet 46 is formed by attaching multiple magnets 46A to the inner circumference of a cylindrical second support member 50. The first magnet 44 and the second magnet 46 are preferably neodymium magnets, sintered magnets, or bonded magnets.

The first magnet 44 and the second magnet 46 are arranged so that the poles of the first magnet 44 and the poles of the second magnet 46 are offset in the circumferential direction of the shaft member 12. The first magnet 44 and the second magnet 46 are arranged so that their respective S poles and N poles are staggered in the circumferential direction of the shaft member 12. Therefore, in the axial direction of the shaft member 12, the S poles of the first magnet 44 and the S poles of the second magnet 46 are not aligned, and the N poles of the first magnet 44 and the N poles of the second magnet 46 are not aligned. The first magnet 44 can face the first yoke piece 40 in the radial direction of the shaft member 12. The number of the first yoke pieces 40 and the number of poles of the first magnet 44 are equal. The second magnet 46 can face the second yoke piece 42 in the radial direction of the shaft member 12. The number of the second yoke pieces 42 and the number of poles of the second magnet 46 are equal. The number of the poles of the first magnet 44 and the number of poles of the second magnet 46 are equal.

According to the hub 10 for a human-powered vehicle of the first embodiment, the following effects can be obtained.
In the hub 10 of the first embodiment, all parts are standardized except for the first shaft member 28 and the second shaft member 30. Because the first shaft member 28 and the second shaft member 30 can be selectively inserted into the rotating body 14, the hub 10 can be easily modified to have different specifications. This improves convenience.

Second Embodiment
A hub 60 for a human-powered vehicle according to a second embodiment will be described with reference to Figures 6 to 10. Components common to the first embodiment are given the same reference numerals as in the first embodiment, and duplicated descriptions will be omitted.

The hub 60 is a hub 60 for a human-powered vehicle, and includes a shaft member 62 and a rotating body 14 that is arranged coaxially with the shaft member 62 so as to rotate relative to the shaft member 62. The shaft member 62 is, for example, a hub axle. The shaft member 62 is, for example, cylindrical. The shaft member 62 includes an inserted portion 64 that is inserted into the rotating body 14. The inserted portion 64 includes a first portion 64A and a second portion 64B that has an outer diameter larger than that of the first portion 64A. As shown in FIG. 7, a groove 62A extending in the axial direction is provided on the outer circumferential surface of the shaft member 62. The groove 62A accommodates electrical wiring extending from the coil 36. The shaft member 62 has a minimum inner diameter LE. The minimum inner diameter LE is the minimum inner diameter of the first portion 64A. The first portion 64A of the shaft member 62 has a first maximum outer diameter LF. The minimum inner diameter LE is 14.5 mm to 15.5 mm. The ratio of the first maximum outer diameter LF to the minimum inner diameter LE can be selected arbitrarily. The first maximum outer diameter LF is preferably set in a range of 120% or more with respect to the minimum inner diameter LE. The first maximum outer diameter LF is preferably set in a range of 125% or less with respect to the minimum inner diameter LE. The second portion 64B of the shaft member 62 has a second maximum outer diameter LG. The ratio of the second maximum outer diameter LG to the minimum inner diameter LE can be selected arbitrarily. The second maximum outer diameter LG is preferably set in a range of 130% or more with respect to the minimum inner diameter LE. The second maximum outer diameter LG is preferably set in a range of 140% or less with respect to the minimum inner diameter LE.

As shown in FIG. 8, a third positioning member 68 is provided on the second portion 64B. The third positioning member 68 is provided in place of the second positioning member 26 of the first embodiment. The third positioning member 68 has a shape similar to that of the first positioning member 24. The third positioning member 68 is attached to the second portion 64B so that it cannot rotate relative to the shaft member 62. In the second embodiment, since the third positioning member 68 is provided, the second intermediate member 18B of the intermediate member 18 is omitted.

The hub 60 preferably further includes a bearing 72 that rotatably supports the rotor 14 on the shaft member 62. The bearing 72 is provided in place of the first bearing 20 of the first embodiment. The bearing 72 is provided at a position closer to one end of the shaft member 62 than the first positioning member 24. The bearing 72 includes a ball 74 provided on the shaft member 62, a ball bearing 76 provided on the rotor 14, and a plurality of spheres 78 disposed between the ball 74 and the ball bearing 76. The outer diameter of the plurality of spheres 78 is smaller than the outer diameter of the sphere 22A of the second bearing 22.

The bearing 72 preferably has a protrusion 80 that prevents foreign matter from entering the rotor 14. The protrusion 80 prevents foreign matter from entering the rotor 14 through the opening 14B of the rotor 14, for example. The location of the protrusion 80 in the bearing 72 can be selected arbitrarily. In the example shown in FIG. 9 and FIG. 10, the protrusion 80 is provided on the ball pusher 74. As shown in FIG. 6, the protrusion 80 is provided in a position in the axial direction of the shaft member 62 closer to the opening 14B of the rotor 14 than the ball support portion 74A that supports the ball 78 of the ball pusher 74. In another example, the protrusion 80 is provided on the ball receiver 76. The protrusion 80 is preferably configured to protrude radially outward from the shaft member 62. A gap is formed between the tip 80A of the protrusion 80 and the inner circumferential surface 14C of the rotor 14. In other words, the tip 80A of the protrusion 80 and the inner circumferential surface 14C of the rotor 14 are not in contact.

According to the hub 60 for a human-powered vehicle of the second embodiment, the following effects can be obtained.
The hub 60 of the second embodiment generally shares the same parts as the hub 10 of the first embodiment, except for the shaft member 62. In addition, the bearing 72 and the third positioning member 68 may be modified as necessary. By changing a small number of parts, such as the bearing 72 and the third positioning member 68, the first shaft member 28, the second shaft member 30, and the shaft member 62 can be selectively inserted into the rotating body 14, so that the hub 60 can be easily modified to different specifications. This improves convenience.

<Modification>
The above-described embodiments are merely examples of possible forms of a hub for a human-powered vehicle according to the present invention, and are not intended to limit the forms. A hub for a human-powered vehicle according to the present invention may take the following modified forms of the above-described embodiments, or a combination of at least two mutually compatible modified forms. In the following modified forms, parts common to the embodiments are given the same reference numerals as the respective embodiments, and descriptions thereof will be omitted.

- The stator 16A can be provided on the rotor 14, and the magnets 16B can be provided on the shaft members 12 and 62. In this case, the current generated in the stator 16A is preferably configured to be output to the outside via a slip ring.

The hub 10 may further include a freewheel arranged alongside the rotating body 14 in the axial direction along the central axis of the shaft members 12, 62. The freewheel is coupled to the rotating body 14 so as to be rotatable around the shaft members 12, 62. In one example, the freewheel transmits the driving force transmitted to the rear sprocket to the rotating body 14 and rotates together with the rotating body 14 around the shaft members 12, 62. The freewheel is configured to transmit rotation in a first rotational direction to the rotating body 14, and is configured not to transmit rotation in a second rotational direction, which is the opposite rotational direction to the first rotational direction, to the rotating body 14.

10, 60...hub, 12, 62...shaft member, 14...rotating body, 16...power generation mechanism, 16A...stator, 16B...magnet, 28...first shaft member, 30...second shaft member, 64...inserted portion, 64A...first part, 64B...second part, 72...bearing, 74...ball bearing, 76...ball support, 78...sphere, 80...protrusion.

Claims (15)

A hub for a human-powered vehicle,
A shaft member;
a rotor provided coaxially with the shaft member so as to rotate relative to the shaft member,
the shaft member has a minimum inner diameter and a maximum outer diameter;
The minimum inner diameter is set to 4.5 mm to 5.5 mm;
A hub, wherein the maximum outer diameter is set within a range of 230% or more of the minimum inner diameter. The hub according to claim 1, wherein the maximum outer diameter is set within a range of 365% or less of the minimum inner diameter. A hub for a human-powered vehicle,
A shaft member;
a rotor provided coaxially with the shaft member so as to rotate relative to the shaft member,
the shaft member has a minimum inner diameter and a maximum outer diameter;
The minimum inner diameter is set to 11.5 mm to 12.5 mm;
A hub, wherein the maximum outer diameter is set within a range of 130% or more of the minimum inner diameter. The hub according to claim 3, wherein the maximum outer diameter is set within a range of 155% or less of the minimum inner diameter. A hub for a human-powered vehicle,
A shaft member;
a rotor provided coaxially with the shaft member so as to rotate relative to the shaft member,
The shaft member includes at least one of a first shaft member at least partially inserted into the rotating body and a second shaft member at least partially inserted into the rotating body,
the first shaft member has a minimum inner diameter and a maximum outer diameter;
the second shaft member has a minimum inner diameter and a maximum outer diameter;
the minimum inner diameter of the first shaft member is different from the minimum inner diameter of the second shaft member;
the maximum outer diameter of the first shaft member is different from the maximum outer diameter of the second shaft member,
The rotating body is a hub configured so that the first shaft member and the second shaft member can be selectively inserted therein. A hub for a human-powered vehicle,
A shaft member;
a rotor provided coaxially with the shaft member so as to rotate relative to the shaft member,
the shaft member includes an inserted portion that is inserted into the rotating body,
The inserted portion includes a first portion and a second portion having an outer diameter larger than that of the first portion. the shaft member has a minimum inner diameter;
the first portion of the shaft member has a first maximum outer diameter;
the minimum inner diameter is between 14.5 mm and 15.5 mm;
The hub according to claim 6 , wherein the first maximum outer diameter is set within a range of 120% or more of the minimum inner diameter. The hub according to claim 7, wherein the first maximum outer diameter is set within a range of 125% or less of the minimum inner diameter. the shaft member has a minimum inner diameter;
the second portion of the shaft member has a second maximum outer diameter;
the minimum inner diameter is between 14.5 mm and 15.5 mm;
The hub according to claim 6 , wherein the second maximum outer diameter is set in a range of 130% or more of the minimum inner diameter. The hub according to claim 9, wherein the second maximum outer diameter is set within a range of 140% or less of the minimum inner diameter. a bearing that rotatably supports the rotating body on the shaft member,
The hub according to any one of claims 6 to 10, wherein the bearing includes a ball pusher provided on the shaft member, a ball support provided on the rotating body, and a plurality of spheres disposed between the ball pusher and the ball support. The hub according to claim 11, wherein the bearing has a protrusion that prevents foreign matter from entering the rotating body. The hub according to claim 12, wherein the protrusion is configured to protrude radially outward from the shaft member. The hub according to any one of claims 1 to 13, further comprising a power generation mechanism disposed between the shaft member and the rotor. The hub of claim 14, wherein the power generating mechanism includes a stator provided on the shaft member and a magnet provided on the rotating body.