JP2024078863A - Generator for human-powered vehicle and hub assembly for human-powered vehicle - Google Patents

Abstract

[Problem] To provide a generator for a human-powered vehicle that can suppress the effect of magnets on electrical components, and a hub assembly for a human-powered vehicle. [Solution] The generator is a generator for a human-powered vehicle, and includes a first member having a central axis, a second member that is rotatable around the central axis relative to the first member, a magnet attached to the second member, electrical components that are positioned differently from the magnet in the axial direction related to the central axis, and a magnetic shield member that at least partially overlaps the magnet when viewed from the axial direction, is located between the magnet and the electrical components in the axial direction, and extends in a radial direction related to the central axis. [Selected Figure] Figure 8

Description

The present disclosure relates to a power generating device for a human-powered vehicle and a hub assembly for a human-powered vehicle.

Patent document 1 discloses a power generating device for a human-powered vehicle that includes a first member having a central axis, a second member that can rotate around the central axis relative to the first member, a magnet attached to the second member, and an electrical component that is positioned differently from the magnet in the axial direction relative to the central axis.

US Patent Application Publication No. 2008/0100183

In the power generating device of Patent Document 1, the magnetism of the magnets may affect electrical components.

One of the objectives of the present disclosure is to provide a generator for a human-powered vehicle and a hub assembly for a human-powered vehicle that can suppress the effect of magnets on electrical components.

A power generating device according to a first aspect of the present disclosure is a power generating device for a human-powered vehicle, and includes a first member having a central axis, a second member that is rotatable around the central axis relative to the first member, a magnet attached to the second member, an electrical component that is positioned at a different position from the magnet in an axial direction relative to the central axis, and a magnetic shield member that at least partially overlaps the magnet when viewed from the axial direction, is located between the magnet and the electrical component in the axial direction, and extends in a radial direction relative to the central axis.
Magnetic field lines are generated by the magnetism of the magnet. According to the power generating device of the first aspect, since the magnetic shield member is located between the magnet and the electric component in the axial direction, the direction of the magnetic field lines is changed by at least a part of the magnetism of the magnet passing through the inside of the magnetic shield member so as not to affect the electric component. Since the direction of the magnetic field lines is changed so that at least a part of the magnetism of the magnet does not affect the electric component, the power generating device can suppress the effect of the magnet on the electric component by the magnetic shield member.

In a power generating apparatus according to a second aspect of the first aspect of the present disclosure, the electrical component includes a magnetic sensor configured to detect magnetism of a magnetic component different from the magnet.
According to the power generating device of the second aspect, the magnetic shield member can suppress the effect of the magnet on the magnetic sensor, thereby suppressing a decrease in the detection performance of the magnetic sensor.

In a third aspect of the power generating device according to the first or second aspect of the present disclosure, the electrical component includes an electrical board.
According to the power generating device of the third aspect, the magnetic shield member can suppress the influence of the magnet on the components mounted on the electric board.

In the power generating device of a fourth aspect according to any one of the first to third aspects of the present disclosure, the magnetic shield member includes a soft magnetic material.
According to the power generating device of the fourth aspect, since the magnetic shield member contains a soft magnetic material, the traveling direction of the magnetic field lines of the magnet can be suitably changed.

In a power generating device of a fifth aspect according to any one of the first to fourth aspects of the present disclosure, the magnetic shield member is disposed all around in a circumferential direction about the central axis.
According to the power generating device of the fifth aspect, the magnetic shield member can change the direction of the magnetic field lines of the magnet over the entire circumferential direction relative to the central axis. Because the magnetic shield member can change the direction of the magnetic field lines of the magnet over the entire circumferential direction, even if the magnetic shield member rotates in the circumferential direction relative to the central axis relative to the electrical components, the magnetic shield member can suppress the influence of the magnet on the electrical components in the power generating device.

In the power generating device of a sixth aspect according to any one of the first to fifth aspects of the present disclosure, the magnetic shield member is arranged to be in contact with the magnet.
According to the power generating device of the sixth aspect, the magnetic shield member can suitably change at least a part of the direction of travel of the magnetic field lines of the magnet from the point where the magnetic shield member and the magnet contact each other.

In a power generating device of a seventh aspect according to any one of the first to sixth aspects of the present disclosure, a back yoke is provided, at least a portion of which is positioned between the magnet and the second member in the radial direction, and the magnetic shield member is magnetically connected to the back yoke.
According to the power generating device of the seventh aspect, since the magnetic shield member is magnetically connected to the back yoke, the traveling direction of the magnetic field lines of the magnet can be changed by the magnetic shield member and the back yoke.

In the power generating device of an eighth aspect according to the seventh aspect of the present disclosure, the magnetic shield member is disposed so as to be in contact with the back yoke.
According to the power generating device of the eighth aspect, since the magnetic shield member is in contact with the back yoke, the magnetic shield member is suitably magnetically connected to the back yoke.

In a power generating device according to a ninth aspect of the seventh or eighth aspect of the present disclosure, the magnetic shield member is formed integrally with the back yoke.
According to the power generating device of the ninth aspect, since the magnetic shield member is formed integrally with the back yoke, the number of parts of the magnetic shield member can be reduced.

In a power generating device of a tenth aspect according to any one of the first to ninth aspects of the present disclosure, the second member is arranged to surround an outer surface of the first member in the radial direction, the magnet is arranged on an inner surface of the second member, and the magnetic shield member extends inwardly from the inner surface of the second member in the radial direction.
According to the power generating device of the tenth aspect, since the magnetic shielding member can cover the side surface of the magnet, the direction of the magnetic field lines of the magnet can be suitably changed by the magnetic shielding member.

In a power generating device of an eleventh aspect according to any one of the first to tenth aspects of the present disclosure, a first radial distance from the central axis to the magnetic shield member in the radial direction is smaller than a second radial distance from the central axis to the magnet in the radial direction.
According to the power generating device of the eleventh aspect, since the first radial distance is smaller than the second radial distance, the direction of the magnetic field lines of the magnet can be suitably changed by the magnetic shield member.

A hub assembly according to a twelfth aspect of the present disclosure is a hub assembly for a human-powered vehicle, comprising a power generating device described in any one of the first to eleventh aspects, wherein the first member includes a shaft member and the second member includes a hub shell.
According to the hub assembly of the twelfth aspect, in a hub assembly including a generator, the influence of magnets on electrical components can be suppressed.

The power generating device for a human-powered vehicle and the hub assembly for a human-powered vehicle disclosed herein can suppress the effect of magnets on electrical components.

FIG. 2 is a front view of the hub assembly for the human-powered vehicle of the first embodiment. FIG. 2 is a perspective view of a hub assembly for the human-powered vehicle of FIG. FIG. 2 is a side view of a hub assembly for the human-powered vehicle of FIG. 4 is a cross-sectional view taken along line D4-D4 in FIG. 3. FIG. 2 is an exploded perspective view of a hub assembly for the human-powered vehicle of FIG. 1 . FIG. 2 is a perspective view of an end of a hub assembly for the human-powered vehicle of FIG. 5 is an enlarged partial cross-sectional view showing the right end portion in the axial direction of the hub assembly for the human-powered vehicle of FIG. 4 and its surrounding area. FIG. 5 is an enlarged partial cross-sectional view showing an axially intermediate portion of the hub assembly for the human-powered vehicle of FIG. 4. FIG. 9 is a perspective view of the bobbin, windings, and lead wires of FIG. 8 . FIG. 9 is a plan view of the bobbin of FIG. 8 . FIG. 9 is a front view of the regulating member of FIG. 8 . FIG. 9 is a front view of the housing of FIG. 8 . FIG. 9 is a plan view of the housing of FIG. 8 . FIG. 13 is a front view of the housing of FIG. 12 with the lid portion removed. 9 is a plan view showing the positional relationship between the magnet, the magnetic sensor, the magnetic field generating component, and the electric board shown in FIG. 8 . 9 is a schematic diagram showing the positional relationship between the first member, the second member, the magnet, the magnetic sensor, the magnetic field generating component, and the electric board shown in FIG. 8 . FIG. 2 is a block diagram showing the electrical configuration of the hub assembly for the human-powered vehicle of FIG. 1 . 5 is a perspective view of the right end portion in the axial direction of the shaft member of FIG. 4 . FIG. FIG. 5 is a side view of the shaft member of FIG. 4 . FIG. 5 is a front view of the auxiliary member of FIG. 4 . 5 is a plan view showing a first state and a second state of the auxiliary member of FIG. 4. FIG. 2 is a perspective view of a hub assembly for the human-powered vehicle of FIG. 1 and a tool for attaching a torque transmission structure to the hub shell. 16 is a timing chart showing an example of changes in the magnetic flux density input to the magnetic sensor of FIG. 15, the output of the first magnetic sensor, and the output of the second magnetic sensor. 18 is a flowchart of a process for determining a rotation direction of a second member, which is executed by the control unit of FIG. 17 . FIG. 11 is a partial cross-sectional view showing an axial middle portion of a hub assembly for a human-powered vehicle according to a second embodiment. FIG. 2 is an enlarged partial cross-sectional view showing the axial right end portion and its surrounding area of a hub assembly for a human-powered vehicle according to a first modified example. FIG. 11 is an enlarged partial cross-sectional view showing the axial right end portion and its surrounding area of a hub assembly for a human-powered vehicle according to a second modified example. FIG. 13 is a perspective view of a bobbin, a winding, and a lead wire according to a third modified example.

First Embodiment
A hub assembly 20 for a human-powered vehicle according to a first embodiment will be described with reference to FIGS. 1 to 24.
The human-powered vehicle 10 is a vehicle that has at least one wheel and can be driven at least by human driving force. The human-powered vehicle 10 includes various types of bicycles, such as mountain bikes, road bikes, city bikes, cargo bikes, hand bikes, and recumbents. The number of wheels that the human-powered vehicle 10 has is not limited. The human-powered vehicle 10 also includes, for example, one-wheeled vehicles and vehicles with two or more wheels. The human-powered vehicle 10 is not limited to vehicles that can be driven only by human driving force. The human-powered vehicle 10 includes E-bikes that use not only human driving force but also the driving force of an electric motor for propulsion. E-bikes include electrically assisted bicycles whose propulsion is assisted by an electric motor. In the following embodiment, the human-powered vehicle 10 will be described as a bicycle.

<Hub assembly 20>
As shown in Fig. 1, the hub axle 22 of the hub assembly 20 is supported by the frame 14 of the human-powered vehicle 10. Spokes of a drive wheel of the human-powered vehicle 10 are attached to a hub shell 24 of the hub assembly 20. The hub assembly 20 is, for example, a rear hub assembly. The hub assembly 20 is configured to transmit the human-powered driving force input from the sprocket 12 to the drive wheel of the human-powered vehicle 10.

2 to 5, the hub assembly 20 includes a hub axle 22. The hub assembly 20 includes a shaft member 26, a hub shell 24, a sprocket support 32, a torque transmission structure 36, and a tool engagement portion 36C. The hub axle 22 includes the shaft member 26. The hub assembly 20 further includes, for example, a bearing 34, a one-way clutch 38, and a connection portion 36A. The hub assembly 20 further includes, for example, a power generation portion 40. The hub assembly 20 includes, for example, a power generation device 42. The power generation device 42 is configured to include the power generation portion 40. The hub assembly 20 further includes, for example, an electrical component 58. The hub assembly 20 includes an electrical cable 88. For example, the hub assembly 20 further includes an auxiliary member 92. The hub assembly 20 includes, for example, at least one connector 70.

<Hub axle 22>
As shown in Figure 4, the hub axle 22 rotatably supports the hub shell 24 and has a central axis C1. The axial direction X1 relative to the central axis C1 includes a first axial direction A1. The axial direction X1 includes, for example, a second axial direction A2 opposite to the first axial direction A1. The hub axle 22 is attached, for example, to a frame end of the frame 14 of the human-powered vehicle 10. The hub axle 22 is attached, for example, to the rear end of the frame 14 of the human-powered vehicle 10. The hub axle 22 includes, for example, a hollow portion having a peripheral wall portion 22A. In this embodiment, the peripheral wall portion 22A is provided on the end cap 28.

The hub axle 22 includes, for example, an axle member 26 and at least one end cap 28. The hub axle 22 includes, for example, an additional end cap 30. The hub axle 22 includes a positioning member 80. The hub axle 22 includes a first frame abutment end surface 22B, a second frame abutment end surface 22C, and at least one cable guide portion 90.

The shaft member 26 has a central axis C1. The central axis of the shaft member 26 coincides with the central axis C1 of the hub axle 22. The shaft member 26 rotatably supports the hub shell 24. The shaft member 26 is, for example, a hollow shaft, and includes an inner surface 26A and an outer surface 26B in the radial direction X2 relative to the central axis C1. The shaft member 26 includes an end portion 26C. The end portion 26C includes one end portion 26C and the other end portion 26C in the axial direction X1.

An end cap 28 is attached to the end 26C in the axial direction X1 relative to the central axis C1 of the shaft member 26. At least one end cap 28 is attached to the end 26C of the shaft member 26 in the axial direction X1. The at least one end cap 28 includes, for example, an end cap 28X and an additional end cap 30. The end cap 28 is attached to the end 26C. For example, the end cap 28X is attached to one end 26C in the axial direction X1, and the additional end cap 30 is attached to the other end 26C in the axial direction X1. For example, a male thread is provided on the end 26C of the shaft member 26. The end cap 28 forms, for example, a hollow portion having the peripheral wall portion 22A of the hub axle 22.

4 and 7, the end cap 28X is disposed on the first axial direction A1 side of the shaft member 26. The end cap 28X is fitted to the end 26C of the shaft member 26. The positioning member 80 is configured to determine the position of the end cap 28X relative to the shaft member 26 in the circumferential direction X3 relative to the central axis C1. For example, the positioning member 80 extends in the radial direction X2 relative to the central axis C1. The positioning member 80 is configured, for example, separately from the end cap 28X and the shaft member 26. The positioning member 80 includes, for example, a pin member. The end cap 28X has a first positioning portion 28A. The end 26C of the shaft member 26 has a second positioning portion 26D. The positioning member 80 has a first portion 80A and a second portion 80B different from the first portion 80A. The first portion 80A is disposed in the first positioning portion 28A. The second portion 80B is placed in the second placement section 26D.

For example, one of the first positioning portion 28A and the second positioning portion 26D includes a positioning hole 82A. The first positioning portion 28A of the end cap 28X includes, for example, a positioning hole 82A. For example, the positioning hole 82A holds the positioning member 80. The first portion 80A of the positioning member 80 is press-fitted into the positioning hole 82A, thereby holding the positioning member 80 in the positioning hole 82A.

For example, the other of the first positioning portion 28A and the second positioning portion 26D includes a positioning recess 82B. The second positioning portion 26D of the end portion 26C of the shaft member 26 includes, for example, a positioning recess 82B. For example, the positioning recess 82B receives the positioning member 80. The second portion 80B of the positioning member 80 is placed in the positioning recess 82B, whereby the positioning recess 82B receives the positioning member 80.

For example, the positioning recess 82B is open at least in the radial direction X2 relative to the central axis C1. The opening of the positioning recess 82B has a gap between the positioning member 80 and one of the side surfaces of the positioning recess 82B in the circumferential direction X3 when the second portion 80B of the positioning member 80 is disposed in the positioning recess 82B. The opening of the positioning recess 82B is formed in the end portion 26C of the shaft member 26 so that the positioning member 80 does not come into contact with one of the side surfaces of the positioning recess 82B in the circumferential direction X3 when the second portion 80B of the positioning member 80 is disposed in the positioning recess 82B. The opening of the positioning recess 82B may be formed so that the second portion 80B of the positioning member 80 is removably press-fitted into the positioning recess 82B. For example, the positioning recess 82B is continuous from the outer surface 26B to the inner surface 26A in the radial direction X2. The positioning recess 82B does not have to be continuous from the outer surface 26B to the inner surface 26A in the radial direction X2, so long as it is open at least to the outer surface 26B so as to receive the positioning member 80. The positioning member 80 includes, for example, an additional positioning member 80X. The additional positioning member 80X is configured to determine the position of the end cap 28 relative to the shaft member 26 in the axial direction X1. In this embodiment, the additional positioning member 80X is configured to determine the position of the end cap 28X relative to the shaft member 26 in the axial direction X1. The additional positioning member 80X includes, for example, an O-ring. The additional positioning member 80X includes, for example, a resin material.

The additional end cap 30 has, for example, a female thread that screws into the male thread of the end 26C. The additional end cap 30 is attached to the shaft member 26 so as to determine the position of the additional bearing 30A relative to the shaft member 26 in the axial direction X1. The additional bearing 30A may be attached to the shaft member 26 by a nut.

As shown in FIG. 1, the first frame abutment end surface 22B is, for example, one end surface of the shaft member 26 in the axial direction X1, and the second frame abutment end surface 22C is, for example, the other end surface of the shaft member 26 in the axial direction X1. The second frame abutment end surface 22C is the end surface opposite the first frame abutment end surface 22B in the axial direction X1 relative to the central axis C1. In this embodiment, the first frame abutment end surface 22B and the second frame abutment end surface 22C are each provided on an end surface of the end cap 28. The first frame abutment end surface 22B is provided on an end surface of the end cap 28X, and the second frame abutment end surface 22C is provided on an end surface of the additional end cap 30.

The frame 14 includes a first frame 14A and a second frame 14B. The first frame abutment end surface 22B faces, for example, the first frame 14A. The second frame abutment end surface 22C faces, for example, the second frame 14B. The first frame abutment end surface 22B and the second frame abutment end surface 22C abut against the frame 14 of the human-powered vehicle 10 when the shaft member 26 is attached to the frame 14. The distance from the first frame abutment end surface 22B to the second frame abutment end surface 22C in the axial direction X1 defines the overlock nut dimension of the hub assembly 20.

<Hub shell 24>
The hub shell 24 is disposed rotatably about the central axis C1. The hub shell 24 rotates relative to the shaft member 26. The hub shell 24 surrounds an outer surface 26B of the shaft member 26. The hub assembly 20 further includes, for example, an additional bearing 30A. The additional bearing 30A is provided at the end of the hub shell 24 on the additional end cap 30 side in the axial direction X1. The additional bearing 30A supports the hub shell 24 rotatably relative to the shaft member 26. The internal space H1 of the hub shell 24 accommodates a portion of the shaft member 26, the power generation unit 40, the housing 62, the housing restriction member 62X, and a portion of the electric cable 88.

<Sprocket support 32>
1 and 2, the sprocket support 32 is attached to the hub shell 24 via a torque transmission structure 36. The sprocket support 32 is attached to one of the ends of the hub axle 22 in the axial direction X1. The sprocket support 32 is rotatably disposed about a central axis C1, and at least one sprocket 12 is attached to the sprocket support 32. The sprocket support 32 rotates relative to the shaft member 26, for example, and at least one sprocket 12 is attached to the sprocket support 32. The sprocket engagement portion 32A includes, for example, a spline.

7, the bearing 34 is provided, for example, on the shaft member 26, and supports the sprocket support 32 rotatably relative to the shaft member 26. The bearing 34 is provided, for example, on the sprocket support 32 via a support member 34D. The bearing 34 is connected to the sprocket support 32 via a bearing 35. The bearing 34 includes, for example, a plurality of bearings 34. The bearing 34 may be one bearing 34. The bearing 34 includes, for example, an outer ring 34A, an inner ring 34B, and a rotating body 34C. The outer ring 34A is provided radially inside the sprocket support 32 via a second one-way clutch portion 38B. The inner ring 34B is provided on the outer surface of the shaft member 26. The rotating body 34C is provided between the outer ring 34A and the inner ring 34B so that the outer ring 34A can rotate relative to the inner ring 34B. For example, the rotating body 34C is a ball, and the bearing 34 is a ball bearing. Bearing 34 may be a roller bearing.

<Torque transmission structure 36>
The torque transmission structure 36 transmits torque from one of the sprocket support 32 and the hub shell 24 to the other of the sprocket support 32 and the hub shell 24. For example, at least a portion of the torque transmission structure 36 is non-detachably attached to the sprocket support 32. For example, the torque transmission structure 36 includes a one-way clutch 38. The one-way clutch 38 is included in the torque transmission structure 36 that transmits torque from the sprocket support 32 to the hub shell 24.

The one-way clutch 38 includes at least one of a roller clutch, a sprag clutch, and a ratchet clutch. The one-way clutch 38 transmits torque from the sprocket support 32 to the hub shell 24 when the speed at which the sprocket support 32 rotates in a predetermined direction becomes greater than the speed at which the hub shell 24 rotates in a predetermined direction corresponding to the forward movement of the human-powered vehicle 10. When torque is transmitted from the sprocket support 32 to the hub shell 24, the sprocket support 32 rotates together with the hub shell 24. When torque is transmitted from the sprocket support 32 to the hub shell 24, for example, when the crank of the human-powered vehicle 10 rotates to drive the human-powered vehicle 10. The one-way clutch 38 is configured to allow relative rotation between the hub shell 24 and the sprocket support 32 when the speed at which the hub shell 24 rotates in a predetermined direction is greater than the speed at which the sprocket support 32 rotates in the predetermined direction. The one-way clutch 38 allows relative rotation, for example, when the human-powered vehicle 10 is coasting.

The one-way clutch 38 includes a first one-way clutch portion 38A and a second one-way clutch portion 38B. The first one-way clutch portion 38A includes, for example, an outer ring of the one-way clutch 38. The second one-way clutch portion 38B includes, for example, an inner ring of the one-way clutch 38. The one-way clutch 38 further includes an engaging portion 38C and an engaged portion 38D. The engaging portion 38C includes a pawl member or a rolling element. The engaged portion 38D includes a groove portion. The engaging portion 38C is provided between the first one-way clutch portion 38A and the second one-way clutch portion 38B. The engaging portion 38C is provided on one of the first one-way clutch portion 38A and the second one-way clutch portion 38B, and the engaged portion 38D is provided on the other of the first one-way clutch portion 38A and the second one-way clutch portion 38B.

The first one-way clutch portion 38A rotates integrally with the sprocket support 32. The first one-way clutch portion 38A is, for example, formed integrally with the sprocket support 32. The first one-way clutch portion 38A may be formed separately from the sprocket support 32. The first one-way clutch portion 38A is, for example, provided on the inner surface of the sprocket support 32. For example, the first one-way clutch portion 38A is positioned outward of at least a portion of the second one-way clutch portion 38B in the radial direction X2 relative to the central axis C1. The second one-way clutch portion 38B rotates integrally with the hub shell 24.

<Connection structure between sprocket support 32 and hub shell 24>
For example, the torque transmission structure 36 includes a connection portion 36A. The sprocket support 32 and the torque transmission structure 36 are detachably attached to the hub shell 24 via the connection portion 36A. The connection portion 36A connects the second one-way clutch portion 38B and the hub shell 24 so that the second one-way clutch portion 38B and the hub shell 24 rotate integrally. The connection portion 36A is, for example, formed separately from the hub shell 24 and attached to the hub shell 24 so as to be non-rotatable relative to the hub shell 24. For example, the connection portion 36A is formed separately from the second one-way clutch portion 38B and attached to the second one-way clutch portion 38B so as to be non-rotatable relative to the second one-way clutch portion 38B. The second one-way clutch portion 38B is disposed inward of at least a portion of the connection portion 36A in the radial direction X2. The first one-way clutch portion 38A is disposed so as to overlap the connection portion 36A when viewed from the axial direction X1.

For example, the connection portion 36A is provided with a first male thread portion 36X. For example, the hub shell 24 is provided with a first female thread portion 24A. For example, the first male thread portion 36X screws into the first female thread portion 24A. The connection portion 36A is provided with a second female thread portion 36Y. For example, the second one-way clutch portion 38B is provided with a second male thread portion 38X. The second male thread portion 38X screws into the second female thread portion 36Y.

For example, the connection portion 36A includes a protrusion 36B. For example, the torque transmission structure 36 includes a protrusion 36B. For example, the protrusion 36B protrudes to the outside of the hub shell 24 in the axial direction X1 relative to the central axis C1. When the sprocket support 32 is attached to the hub shell 24, the protrusion 36B protrudes from the inside of the hub shell 24 in the first axial direction A1. The protrusion 36B is, for example, a single part, and includes a portion that protrudes to the outside of the hub shell 24 and a portion that is housed inside the hub shell 24. For example, the protrusion 36B extends outward in the radial direction X2 relative to the central axis C1. In this embodiment, the protrusion 36B is formed integrally with the connection portion 36A.

The tool engagement portion 36C shown in Figures 7 and 22 is configured to be engaged by a tool T1. The tool engagement portion 36C is provided on the torque transmission structure 36 and is configured to be able to engage the tool T1 from outside the hub shell 24. The torque transmission structure 36 is attached to the hub shell 24 using the tool engagement portion 36C.

For example, the tool engagement portion 36C is provided on the connection portion 36A. For example, the connection portion 36A includes the tool engagement portion 36C. For example, the tool engagement portion 36C is provided on the protrusion 36B. For example, the tool engagement portion 36C is provided on a portion of the protrusion 36B that protrudes to the outside of the hub shell 24. The tool engagement portion 36C is located radially outward from the sprocket support 32 in the radial direction X2 relative to the central axis C1. For example, the tool engagement portion 36C is provided on an outer surface 36D formed radially outward from the central axis C1 of the protrusion 36B. The outer surface 36D formed radially outward from the central axis C1 of the protrusion 36B is located outward from the inner surface of the hub shell 24 in the radial direction X2. The inner surface of the hub shell 24 is located at the end of the hub shell 24 to which the connection portion 36A is attached. An outer surface 36D formed radially outward with respect to the central axis C1 of the protrusion 36B is positioned outward in the radial direction X2 from at least a portion of the outer surface of the hub shell 24. The outer surface of the hub shell 24 is positioned at the end of the hub shell 24 to which the connection portion 36A is attached. The tool engagement portion 36C is positioned closer to the hub shell 24 than the sprocket engagement portion 32A in the axial direction X1 with respect to the central axis C1. For example, the tool engagement portion 36C is provided on the outer surface 36D so that its entirety is positioned closer to the hub shell 24 than the sprocket engagement portion 32A.

For example, the tool T1 is used to attach the torque transmission structure 36 to the hub shell 24 with the hub shell 24 placed on the shaft member 26. For example, a spline 36Z is formed in the tool engagement portion 36C. The tool T1 engages with the spline 36Z. The tool T1 includes, for example, an annular portion in which an inner circumferential spline that engages with the spline 36Z is formed. The tool T1 is fitted into the tool engagement portion 36C from the axial direction X1, and the first male thread portion 36X is screwed into the first female thread portion 24A by rotating the tool engagement portion 36C.

<Power generation device 42>
As shown in FIG. 8, the power generating device 42 of this embodiment is configured as a hub assembly 20. The power generating device 42 includes, for example, a hub dynamo. The power generating device 42 includes a first member 42A, a second member 42B, a magnet 44, an electric component 58, and a magnetic shield member 60. The first member 42A has a central axis C1. The power generating device 42 further includes, for example, a shaft member 26. In this embodiment, the first member 42A includes the shaft member 26. For example, the second member 42B is provided so as to surround the outer surface 42Z of the first member 42A in the radial direction X2. The second member 42B is rotatable relative to the first member 42A around the central axis C1. In this embodiment, the second member 42B includes the hub shell 24. The power generating device 42 of this embodiment includes a power generating unit 40. For example, the power generating unit 40 generates power in accordance with the rotation of the hub shell 24. The power generating unit 40 is disposed on the shaft member 26 so as not to rotate relative to the shaft member 26 .

The second member 42B includes, for example, a metal material. The second member 42B includes, for example, an aluminum alloy. The second member 42B is, for example, entirely made of a metal material. The magnet 44 is attached to the second member 42B. For example, the magnet 44 is provided on the inner surface of the second member 42B. The magnet 44 includes, for example, a plurality of magnets 44. The plurality of magnets 44 are, for example, provided on the inner surface of the second member 42B so as to be aligned in the circumferential direction X3.

The power generating device 42 includes, for example, a back yoke 42C at least a portion of which is disposed between the magnet 44 and the second member 42B in the radial direction X2. The back yoke 42C is provided on the inner surface of the second member 42B so as to change the direction of travel of the magnetic field lines of the magnet 44. The back yoke 42C is provided, for example, so as to cover the entire outer surface of the magnet 44. The back yoke 42C is provided on the inner surface of the second member 42B. The magnet 44 is provided on the inner surface of the back yoke 42C.

As shown in Figs. 7 to 9, the power generating device 42 includes a bobbin 46, a winding 50A, a lead wire 50B, and at least one lead wire guide portion 54. The power generating device 42 includes, for example, a yoke 42D. The power generating device 42 includes, for example, a claw-pole type dynamo. The power generating device 42 generates electricity by generating a current in the winding 50A provided on the shaft member 26 as the magnet 44 rotates together with the hub shell 24. The power generating unit 40 is, for example, a part that constitutes the dynamo. The power generating unit 40 includes, for example, a bobbin 46, a winding 50A, and a yoke 42D. The power generating unit 40 further includes, for example, a magnet 44 and a back yoke 42C.

<Bobbin 46>
As shown in FIG. 9 and FIG. 10, the bobbin 46 is arranged on the shaft member 26 so as not to rotate relative to the shaft member 26. Therefore, when the shaft member 26 does not rotate, the bobbin 46 does not rotate. On the other hand, when the shaft member 26 rotates, the bobbin 46 rotates integrally with the shaft member 26. In this embodiment, the shaft member 26 does not rotate. The central axis of the bobbin 46 coincides with the central axis C1 of the hub axle 22. The bobbin 46 includes a winding arrangement portion 46A and a first flange 46B. The bobbin 46 includes, for example, a second flange 46C. The winding 50A is wound on the bobbin 46. The winding 50A is wound on the winding arrangement portion 46A of the bobbin 46. For example, the winding 50A is arranged on the winding arrangement portion 46A. The second flange 46C is arranged to protrude in the radial direction X2 from the end of the winding arrangement portion 46A opposite to the first flange 46B in the axial direction X1. The first axial direction A1 is a direction from the winding arrangement portion 46A toward the first flange 46B. For example, the first axial direction A1 is a direction from the winding 50A toward the first bobbin end 46X. The second axial direction A2 is a direction from the winding arrangement portion 46A toward the second bobbin end 46Y. The second bobbin end 46Y is an end on the opposite side to the first bobbin end 46X in the axial direction X1.

9 and 10, for example, the first flange 46B extends from the end of the winding arrangement portion 46A in the axial direction X1 radially outward with respect to the central axis C1 of the bobbin 46. The first flange 46B is arranged so as to protrude from the end of the winding arrangement portion 46A in the radial direction X2 beyond the winding arrangement portion 46A. For example, the first flange 46B includes a plurality of protruding portions 48 protruding in the first axial direction A1. The protruding portion 48 protrudes from the first flange 46B in the first axial direction A1. For example, the plurality of protruding portions 48 include a first protruding portion 48A and a second protruding portion 48B. The first protruding portion 48A protrudes from the first flange 46B in the first axial direction A1 so as not to contact the regulating member 52 in the first axial direction A1. For example, the second protruding portion 48B has a larger protruding amount in the first axial direction A1 than the first protruding portion 48A. The second protrusions 48B protrude in the first axial direction A1 so as to extend beyond the restricting member 52 in the first axial direction A1. The multiple protrusions 48 include, for example, multiple first protrusions 48A and multiple second protrusions 48B. In this embodiment, the multiple protrusions 48 include 14 first protrusions 48A and two second protrusions 48B. The two second protrusions 48B are arranged adjacent to each other in the circumferential direction X3.

As shown in Figures 8 and 9, the yoke 42D is disposed on the bobbin 46. A portion of the yoke 42D is disposed inward from the bobbin 46 in the radial direction X2. A portion of the yoke 42D is disposed outward from the bobbin 46 in the radial direction X2. The power generating device 42 includes a plurality of yokes 42D. The plurality of yokes 42D are disposed side by side in the circumferential direction X3. Some of the plurality of yokes 42D are supported by the first flange 46B, and the other portion of the yokes 42D are supported by the second flange 46C. A portion of the yoke 42D supported by the first flange 46B is disposed between two adjacent protrusions 48.

The yoke 42D faces the magnet 44 in the radial direction X2. The yoke 42D includes a first yoke 42X and a second yoke 42Y. The first yoke 42X is arranged so as to be adjacent to the second yoke 42Y in the axial direction X1. The first yoke 42X is arranged on the first flange 46B so as to be located between two adjacent protrusions 48 in the circumferential direction X3 among the multiple protrusions 48. The second yoke 42Y is arranged on the second flange 46C so as to be located between two adjacent third protrusions 48C in the circumferential direction X3. The third protrusions 48C protrude from the second flange 46C in the second axial direction A2. The first yoke 42X and the second yoke 42Y are each composed of multiple yoke pieces.

<Lead wire 50B>
The lead wire 50B is electrically connected to the winding 50A. The lead wire 50B sends the current generated in the winding 50A to the outside of the power generating unit 40. The lead wire 50B includes, for example, a positive lead wire 50B and a negative lead wire 50B. The positive lead wire 50B and the negative lead wire 50B are connected to both ends of the winding 50A, respectively. In this embodiment, the lead wire 50B is separate from the winding 50A. If the lead wire 50B is electrically connected to the winding 50A, the lead wire 50B may be integrated with the winding 50A. As shown in FIG. 14, the positive lead wire 50B and the negative lead wire 50B led out to the first axial direction A1 side are electrically connected to an electric component 58.

<Restriction member 52>
The power generating device 42 includes, for example, a restricting member 52. For example, the bobbin 46 and the restricting member 52 are attached to the shaft member 26. The restricting member 52 is adjacent to the first bobbin end 46X of the bobbin 46 in the axial direction X1 relative to the central axis C1 of the bobbin 46, and restricts the movement of the bobbin 46 in the axial direction X1. The restricting member 52 restricts the movement of the bobbin 46 in the first axial direction A1. For example, the restricting member 52 is welded to the shaft member 26. The restricting member 52 is attached to the shaft member 26 by welding. For example, the restricting member 52 has a first surface 52A facing the first bobbin end 46X in the axial direction X1, and a second surface 52B opposite to the first surface 52A in the axial direction X1. The restricting member 52 has a lead wire 50B arranged from the first surface 52A to the second surface 52B when viewed from a direction perpendicular to the axial direction X1.

8, the restricting member 52 includes, for example, a first restricting member 52C, a second restricting member 52D, and an additional restricting member 52X. The first restricting member 52C is adjacent to the first bobbin end 46X of the bobbin 46 in the axial direction X1 relative to the central axis C1 of the bobbin 46, and restricts the movement of the bobbin 46 in the first axial direction A1. The first restricting member 52C is welded to the shaft member 26. The second restricting member 52D and the additional restricting member 52X are adjacent to the second bobbin end 46Y of the bobbin 46 in the axial direction X1, and restrict the movement of the bobbin 46 in the second axial direction A2. The additional restricting member 52X includes, for example, a C-ring. The second restricting member 52D and the additional restricting member 52X are arranged on the shaft member 26, the power generating unit 40 is arranged on the shaft member 26, and the first restricting member 52C is welded to the shaft member 26, whereby the power generating unit 40 is arranged on the shaft member 26. In the axial direction X1, the second restricting member 52D is disposed between the second bobbin end 46Y and the additional restricting member 52X.

<Lead Wire Guide Portion 54>
The lead wire guide portion 54 suppresses contact between the lead wire 50B and the regulating member 52. The lead wire guide portion 54 is configured, for example, so as not to cause the lead wire 50B to come into contact with the regulating member 52. The lead wire guide portion 54 is provided, for example, integrally with the bobbin 46. For example, at least one lead wire guide portion 54 includes a resin material. For example, the entire bobbin 46 is formed of a resin material. The lead wire guide portion 54 includes, for example, a thermosetting resin such as a polyester resin and an epoxy resin. For example, the lead wire guide portion 54 is formed of a resin material.

For example, at least one lead wire guide portion 54 is provided on the first flange 46B. For example, at least one lead wire guide portion 54 is provided on at least one of the multiple protrusions 48. At least one lead wire guide portion 54 is provided on the second protrusion 48B. At least one lead wire guide portion 54 is provided in a recess of the second protrusion 48B that is recessed in the radial direction X2 among the second protrusions 48B. The through portion 54A of the lead wire guide portion 54 is included in the recess of the second protrusion 48B that is recessed in the radial direction X2. The through portion 54A of the lead wire guide portion 54 is included in a hole of the second protrusion 48B that extends in the axial direction X1.

The lead wire guide portion 54 is configured to lead the lead wire 50B toward the first axial direction A1 side of the restricting member 52. At least one lead wire guide portion 54 is arranged with at least a part of the lead wire 50B and extends in the axial direction X1. At least one lead wire guide portion 54 penetrates the second protruding portion 48B in the axial direction X1, and the lead wire 50B is arranged in a portion of the at least one lead wire guide portion 54 that penetrates the second protruding portion 48B in the axial direction X1. For example, the at least one lead wire guide portion 54 includes a through portion 54A in which the lead wire 50B is arranged and that penetrates in the axial direction X1. The through portion 54A penetrates the second protruding portion 48B in the axial direction X1. For example, the at least one lead wire guide portion 54 is configured to extend beyond the first surface 52A in the first axial direction A1. The lead wire guide portion 54 is configured to extend beyond the second surface 52B in the first axial direction A1. The lead wire guide portion 54 may be configured not to extend beyond the second surface 52B in the first axial direction A1.

For example, at least one lead wire guide portion 54 includes a plurality of lead wire guide portions 54. For example, one lead wire 50B is arranged in one lead wire guide portion 54. The number of at least one lead wire guide portion 54 is, for example, equal to the number of lead wires 50B. In this embodiment, at least one lead wire guide portion 54 includes two lead wire guide portions 54. The two lead wire guide portions 54 are provided on different second protrusions 48B, and a positive lead wire 50B and a negative lead wire 50B are arranged on each of them. The two second protrusions 48B on which the lead wire guide portion 54 is provided are adjacent to each other in the circumferential direction X3 so that there is no other protrusion 48 between the two second protrusions 48B.

<Lead wire guide arrangement portion 56>
As shown in FIG. 9 and FIG. 11, the restricting member 52 is provided with a lead wire guide arrangement portion 56. At least a part of at least one lead wire guide portion 54 is arranged in the lead wire guide arrangement portion 56. For example, the lead wire guide arrangement portion 56 includes at least one of a hole extending in the axial direction X1 and a recess 56B recessed in the radial direction X2 with respect to the central axis C1 of the bobbin 46. In this embodiment, the lead wire guide arrangement portion 56 includes a recess 56B recessed in the radial direction X2. The lead wire guide portion 54 is arranged in the recess 56B. The lead wire guide arrangement portion 56 may include a hole 56A extending in the axial direction X1. When the lead wire guide arrangement portion 56 includes a hole 56A extending in the axial direction X1, the lead wire guide portion 54 may be arranged in the hole 56A. The shape of the lead wire guide arrangement portion 56 is determined according to the shape of the lead wire guide portion 54.

<Electrical component 58>
As shown in Fig. 8, the electrical component 58 is disposed inside the hub assembly 20. For example, the electrical component 58 is provided in the internal space H1 of the hub shell 24. For example, the electrical component 58 is disposed at a position different from the magnet 44 in the axial direction X1 relative to the central axis C1. The electrical component 58 is disposed so as not to overlap with the magnet 44 in the axial direction X1. For example, the electrical component 58 includes a capacitor 64X. For example, the electrical component 58 includes at least one capacitor 64X. For example, the capacitor 64X is charged with electricity generated in the winding 50A.

For example, the electrical component 58 includes a magnetic sensor 76. For example, the electrical component 58 includes an electrical board 58A. For example, the electrical board 58A extends in the axial direction X1 relative to the central axis C1. The electrical board 58A is disposed at a position different from the magnet 44 in the axial direction X1. The electrical board 58A is disposed so as not to overlap the magnet 44 in the axial direction X1. The electrical board 58A is attached to the shaft member 26. The electrical board 58A includes an additional electrical board 58Y extending in the radial direction X2. The additional electrical board 58Y is disposed with a sensor 58X such that at least a portion of the sensor 58X overlaps the magnet 44 when viewed from the axial direction X1. The sensor 58X may include, for example, a portion of the magnetic sensor 76. The sensor 58X may include, for example, a sensor that detects at least one of acceleration and inclination. The sensor 58X may include a gyro sensor.

<Magnetic shield member 60>
The magnetic shield member 60 is disposed inside the second member 42B so as to change the direction of magnetic field lines of the magnet 44. The magnetic shield member 60 changes the direction of magnetic field lines generated at least from the end of the magnet 44 in the first axial direction A1. When viewed from the axial direction X1, at least a portion of the magnetic shield member 60 overlaps with the magnet 44, and is located between the magnet 44 and the electric component 58 in the axial direction X1, and extends in the radial direction X2 with respect to the central axis C1. When viewed from the axial direction X1, the magnetic shield member 60 overlaps with the entire magnet 44. Therefore, when viewed from the axial direction X1, the magnetic shield member 60 includes an area overlapping with the entire magnet 44. The magnetic shield member 60 is disposed at the same position as the restricting member 52 in the axial direction X1. For example, the magnetic shield member 60 includes a soft magnetic material.

For example, the magnetic shield member 60 extends inward from the inner surface of the second member 42B in the radial direction X2. For example, the first radial distance Y1 is smaller than the second radial distance Y2. For example, the first radial distance Y1 is the distance from the central axis C1 to the magnetic shield member 60 in the radial direction X2. The first radial distance Y1 is, for example, the distance from the central axis C1 to the end of the magnetic shield member 60 located on the innermost side in the radial direction X2. For example, the second radial distance Y2 is the distance from the central axis C1 to the magnet 44 in the radial direction X2. The second radial distance Y2 is, for example, the distance from the central axis C1 to the end of the magnet 44 located on the innermost side in the radial direction X2.

For example, the magnetic shield member 60 is magnetically connected to the back yoke 42C. For example, the magnetic shield member 60 is arranged so as to contact the back yoke 42C. For example, the magnetic shield member 60 is formed integrally with the back yoke 42C. For example, the magnetic shield member 60 is arranged all around in the circumferential direction X3 with respect to the central axis C1. The magnetic shield member 60 is arranged so that the first radial distance Y1 is substantially the same all around. For example, even if the magnet 44 is configured to rotate around the central axis C1 with respect to the magnetic shield member 60, since the magnetic shield member 60 is arranged all around, the magnetic shield member 60 can change the direction of travel of the magnetic field lines of the magnet 44. The magnetic shield member 60 is formed, for example, by bending the end of the back yoke 42C radially inward. For example, the magnetic shield member 60 is arranged so as to contact the magnet 44. The magnetic shield member 60 is arranged so as to contact at least the end of the magnet 44 in the first axial direction A1.

<Housing 62 and Housing Restriction Member 62X>
As shown in FIG. 8, the hub assembly 20 further includes, for example, a housing 62 that accommodates at least a portion of the electric component 58, and a housing restricting member 62X that restricts movement of the housing 62 relative to the shaft member 26. At least a portion of the electric component 58 is provided in the housing 62. The housing 62 is provided inside the hub shell 24 and as a separate body from the hub shell 24. The housing 62 includes, for example, a resin material. The housing 62 accommodates at least a portion of the electric component 58. For example, at least a portion of the electric component 58 is accommodated in the internal space H2 of the housing 62. For example, the housing 62 includes an inner wall 62A, an outer wall 62B, an end wall 62C, and a lid portion 62D. For example, the housing 62 has an accommodating portion 64 in which the electric component 58 is disposed. The housing 62 includes a shaft member receiving portion 66 and an opening 68. The housing 62 has, for example, a U-shape when viewed in the axial direction X1. For example, the opening 68 corresponds to the opening of a U-shape and the shaft receiving portion 66 corresponds to the bottom of the U-shape.

12 to 14, for example, the inner wall 62A defines the shaft member receiving portion 66 and the opening 68. The inner wall 62A includes a plate-like member extending in the axial direction X1. For example, the outer wall 62B is located away from the inner wall 62A radially outward with respect to the central axis C1. The outer wall 62B includes a plate-like member extending in the axial direction X1. For example, the end wall 62C connects the inner wall 62A and the outer wall 62B and at least partially defines the internal space H2 of the housing 62. The end wall 62C includes a plate-like member extending in a direction perpendicular to the axial direction X1. For example, the lid portion 62D covers at least a part of the internal space H2. The lid portion 62D includes a plate-like member extending in a direction perpendicular to the axial direction X1. For example, the inner wall 62A, the outer wall 62B, and the end wall 62C are integrally formed to form the internal space H2. For example, the lid portion 62D is formed separately from the inner wall 62A, the outer wall 62B, and the end wall 62C, and is attached to the inner wall 62A and the outer wall 62B. The lid portion 62D is attached to the inner wall 62A and the outer wall 62B in a state in which at least a portion of the electrical component 58 is housed in the internal space H2 of the housing 62.

For example, the storage section 64 includes a first storage section 64A, a second storage section 64B, and a third storage section 64C. For example, the second storage section 64B is arranged so as to sandwich the central axis C1 with the first storage section 64A. For example, the third storage section 64C is arranged between the first storage section 64A and the second storage section 64B in the circumferential direction X3 with respect to the central axis C1. For example, at least one electric storage device 64X is stored in at least one of the first storage section 64A and the second storage section 64B. The at least one electric storage device 64X includes two electric storage devices 64X. At least one electric storage device 64X can be arbitrarily stored in at least one of the first storage section 64A and the second storage section 64B depending on the number of at least one electric storage device 64X. The two electric storage devices 64X are respectively stored in the first storage section 64A and the second storage section 64B.

As shown in FIG. 8, the housing regulating member 62X is configured to regulate the movement of the housing 62 relative to the shaft member 26. The housing regulating member 62X is attached to the housing 62, for example, by a screw or the like. The housing regulating member 62X includes, for example, a plate-shaped member extending perpendicular to the axial direction X1. The housing regulating member 62X is attached to the shaft member 26 so as not to move relative to the shaft member 26 by being attached to the power generation unit 40, for example, by a screw or the like, at a portion different from the portion attached to the housing 62. The housing regulating member 62X is attached to the first regulating member 52C, for example.

As shown in FIG. 4, the housing 62 is configured to surround at least a portion of the shaft member 26. For example, the shaft member 26 includes a first shaft portion 26X. For example, the housing 62 is disposed in the first shaft portion 26X in an axial direction X1 relative to the central axis C1. The dimension D1 of the first shaft portion 26X is, for example, the largest dimension of the outer diameter of the outer surface 26B of the shaft member 26 in the direction perpendicular to the axial direction X1 in the first shaft portion 26X.

For example, the shaft member 26 includes a first shaft portion 26X and a second shaft portion 26Y. For example, the second shaft portion 26Y is different from the first shaft portion 26X in the axial direction X1. The second shaft portion 26Y is disposed on the second axial direction A2 side with respect to the first shaft portion 26X. For example, the dimension D2 of the second shaft portion 26Y in the radial direction X2 is larger than the dimension D1 of the first shaft portion 26X in the radial direction X2. For example, the second shaft portion 26Y is provided with a power generating unit 40. The dimension D2 of the second shaft portion 26Y is a dimension that prevents the housing 62 from moving beyond the second shaft portion 26Y in the axial direction X1 when the housing 62 is disposed on the shaft member 26. Therefore, the housing 62 cannot be inserted into the shaft member 26 from the second shaft portion 26Y toward the first shaft portion 26X in the axial direction X1.

For example, the shaft member 26 includes a third shaft portion 26Z. For example, the third shaft portion 26Z is different from both the first shaft portion 26X and the second shaft portion 26Y in the axial direction X1. The third shaft portion 26Z is arranged on the first axial direction A1 side with respect to the first shaft portion 26X. For example, the second shaft portion 26Y and the third shaft portion 26Z are arranged to sandwich the first shaft portion 26X. For example, the dimension D3 of the third shaft portion 26Z in the radial direction X2 is larger than the dimension D1 of the first shaft portion 26X in the radial direction X2. For example, a bearing 34 is attached to the third shaft portion 26Z. The dimension D3 of the third shaft portion 26Z is a dimension that the housing 62 cannot move beyond the third shaft portion 26Z in the axial direction X1 when the housing 62 is arranged on the shaft member 26. Therefore, the housing 62 cannot be inserted into the shaft member 26 in the axial direction X1 from the third shaft portion 26Z toward the first shaft portion 26X.

The shaft member receiving portion 66 receives the shaft member 26. The housing 62 is disposed on the shaft member 26 by receiving the shaft member 26 in the radial direction X2 through the opening 68 into the shaft member receiving portion 66. The shaft member receiving portion 66 is disposed on the radial inner surface of the inner wall 62A. For example, the shaft member receiving portion 66 is configured to follow the shape of at least a part of the shaft member 26 in the circumferential direction X3 about the central axis C1. For example, when the shaft member receiving portion 66 is configured to follow the shape of the arc-shaped portion of the outer peripheral surface of the shaft member 26, the shaft member receiving portion 66 has a shape corresponding to the arc shape of the outer peripheral surface of the shaft member 26. For example, the shaft member receiving portion 66 is configured to follow the shape of the portion of the shaft member 26 that is 90 degrees or more and 200 degrees or less in the circumferential direction X3. In other words, the portion of the shaft member receiving portion 66 that follows the shape of the shaft member 26 has a length that corresponds to 90 degrees or more and 200 degrees or less in the circumferential direction X3. The shaft member receiving portion 66 is configured, for example, to conform to the shape of a substantially 180-degree portion of the shaft member 26 in the circumferential direction X3.

The opening 68 communicates with the shaft member receiving portion 66 so that the shaft member 26 is received in the shaft member receiving portion 66 through the opening 68. The opening 68 is connected to the shaft member receiving portion 66 in the radial direction X2 relative to the central axis C1. For example, the opening 68 is arranged in a portion different from the portion where the shaft member receiving portion 66 is along the shaft member 26 in the circumferential direction X3, and is configured to extend from one end of the housing 62 to the other in the axial direction X1 relative to the central axis C1. The opening 68 is configured to extend from the inner wall 62A to the outer wall 62B in the radial direction X2.

An opening 68 is disposed in a portion of the radial inner surface of the inner wall 62A where the shaft member receiving portion 66 is not disposed. The opening 68 includes a first side portion 68A and a second side portion 68B. The shaft member receiving portion 66 is disposed adjacent to the first side portion 68A on the radial inner surface of the inner wall 62A, and the second side portion 68B is disposed adjacent to the shaft member receiving portion 66. In short, in the circumferential direction X3, the first side portion 68A is disposed at one end of the shaft member receiving portion 66, and the second side portion 68B is disposed at the other end of the shaft member receiving portion 66. The first side portion 68A and the second side portion 68B are disposed parallel to each other.

For example, the opening 68 forms an axial member passage path 68C through which the axial member 26 can pass. The axial member passage path 68C is a passage that continues from the outer wall 62B to the inner wall 62A of the housing 62. For example, the axial member 26 is configured to be received in the axial member receiving portion 66 via the axial member passage path 68C. The axial member 26 passes through the axial member passage path 68C so as to be received in the axial member receiving portion 66. For example, the opening dimension D4 of the opening 68 is equal to or greater than the dimension D1 of the first axial portion 26X in the radial direction X2. The opening dimension D4 of the opening 68 is, for example, the distance from the first side portion 68A to the second side portion 68B as viewed from the axial direction X1. The opening dimension D4 of the opening 68 is, for example, greater than the dimension D1 of the first axial portion 26X in the radial direction X2. In this embodiment, the first side portion 68A and the second side portion 68B are arranged in parallel, so that the opening dimension D4 is constant through the axial member passage path 68C. As long as the shaft member 26 can pass through the shaft member passage 68C, the opening dimension D4 of the opening 68 may vary in part throughout the shaft member passage 68C.

<Connector 70>
As shown in Figs. 8 and 14, for example, at least one connector 70 connects the electrical component 58 accommodated in the housing 62 to an electrical cable 88 arranged outside the housing 62. For example, at least one connector 70 is arranged in at least one of the first accommodating portion 64A and the second accommodating portion 64B. The connector 70 is arranged in the second accommodating portion 64B, for example. The at least one connector 70 may include a plurality of connectors 70, and the connectors 70 may be arranged in both the first accommodating portion 64A and the second accommodating portion 64B. The connector 70 is electrically connected to at least the electrical board 58A. The connector 70 is electrically connected to the electric storage device 64X. A connection portion of the connector 70 is exposed from the outer wall 62B of the housing 62. In order to protect the connector 70 when the electrical cable 88 is connected to the connector 70, an O-ring is arranged in the connector 70. The socket of the connector 70 is disposed so as to face a direction perpendicular to the axial direction X1 so that the electric cable 88 can be connected from a direction perpendicular to the axial direction X1. A portion of the connector 70 protrudes to the outside from the outer wall 62B. An annular member is provided between the outer wall 62B and the connector 70. The annular member is, for example, an O-ring. The annular member can prevent dust, liquid, etc. from entering the housing portion 64 through a gap between the outer wall 62B and the connector 70.

<Rotation device 72>
As shown in FIG. 7 and FIG. 17, for example, the hub assembly 20 includes a rotating device 72 for a human-powered vehicle. The rotating device 72 of this embodiment is configured as the hub assembly 20. The rotating device 72 includes a first member 72A, a second member 72B, at least one magnet 74, and at least one magnetic sensor 76. The rotating device 72 includes a first member 72A, a second member 72B, the magnet 74, the magnetic sensor 76, and a magnetic field generating part 72X. The magnetic field generating part 72X is configured not to rotate relative to the first member 72A and is different from the magnet 74. Therefore, when the first member 72A does not rotate, the magnetic field generating part 72X does not rotate. On the other hand, when the first member 72A rotates, the magnetic field generating part 72X rotates integrally with the first member 72A. The magnetic field generating part 72X is configured not to rotate relative to the first member 72A by being attached to the electric board 58A. The magnetic field generating component 72X includes an electric component that generates magnetic field. The magnetic field generating component 72X includes, for example, an inductor. The magnetic field generating component 72X includes, for example, a coil. The magnetic field generating component 72X generates magnetic field when electricity is applied thereto. The rotating device 72 further includes, for example, an electric board 58A. The rotating device 72 includes, for example, a control unit 78.

The first member 72A has a central axis C1. In this embodiment, the first member 72A is the shaft member 26. The second member 72B rotates relative to the first member 72A about the central axis C1. The second member 72B includes at least one of the hub shell 24 and the sprocket support 32. In this embodiment, the second member 72B includes, for example, the sprocket support 32.

<Magnetic sensor 76>
For example, the magnetic sensor 76 is configured to detect the magnetism of a magnetic component 74X different from the magnet 44. The magnetic component 74X is, for example, a magnet 74. The magnetic sensor 76 is provided on the electric board 58A. The magnetic sensor 76 is disposed closer to the electric component 58 than the magnetic shield member 60 in the axial direction X1. The magnetic sensor 76 is configured not to rotate relative to the first member 72A, and detects the magnetism of the magnet 74. Therefore, when the first member 72A does not rotate, the magnetic sensor 76 does not rotate. On the other hand, when the first member 72A rotates, the magnetic sensor 76 rotates integrally with the first member 72A. At least one magnetic sensor 76 is configured not to rotate relative to the first member 72A, and detects the magnetism of at least one magnet 74. At least one magnetic sensor 76 is configured not to rotate relative to the first member 72A. The magnetic sensor 76 is configured not to rotate relative to the first member 72A by being attached to the electric board 58A. The magnetic sensor 76 is, for example, configured separately from the first member 72A. The magnetic sensor 76 is, for example, provided on the first member 72A so as to be able to rotate integrally with the first member 72A. For example, the at least one magnetic sensor 76 is arranged so as not to face the at least one magnet 74. The magnetic sensor 76 is arranged so as not to face the magnet 74 in the axial direction X1. For example, the at least one magnetic sensor 76 is arranged in the first region R1 in the radial direction X2.

8 and 15, at least one magnetic sensor 76 has a detection surface 76X that detects the magnetism of the magnet 74. A magnetic detection element is disposed on the detection surface 76X. The detection surface 76X is disposed non-perpendicular to the magnetization direction M1 in which the south pole and north pole of the at least one magnet 74 are aligned. For example, the magnetization direction M1 is parallel to the axial direction X1. The detection surface 76X is disposed at an angle to the magnetization direction M1 or parallel to the magnetization direction M1. For example, the detection surface 76X is disposed parallel to the magnetization direction M1.

The magnetic flux density of the magnetism generated by magnet 74 decreases in a direction intersecting magnetization direction M1 and moving away from magnet 74. In addition, the direction of the magnetic field lines of magnet 74 curves in a direction intersecting magnetization direction M1 as it moves away from magnet 74. By disposing magnetic sensor 76 at a position offset from magnet 74 in axial direction X1 and offset from magnet 74 in radial direction X2, magnetic sensor 76 can efficiently detect the magnetism of magnet 74.

As shown in FIG. 15 and FIG. 16, the magnetic sensor 76 includes a first magnetic sensor 76A and a second magnetic sensor 76B. The first magnetic sensor 76A detects the magnetism of the magnet 74. The second magnetic sensor 76B detects the magnetism of the magnet 74 independently of the first magnetic sensor 76A. The first magnetic sensor 76A and the second magnetic sensor 76B each include, for example, a separate detection element. The first magnetic sensor 76A and the second magnetic sensor 76B are provided separately.

<Magnet 74>
As shown in FIG. 15 and FIG. 16, at least one magnet 74 is provided on the second member 72B. The magnet 74 is provided on the second member 72B. When the second member 72B rotates relative to the first member 72A around the central axis C1, the magnet 74 is configured to rotate relative to the first member 72A around the central axis C1. When the second member 72B rotates relative to the first member 72A around the central axis C1, the magnet 74 is configured to rotate integrally with the second member 72B around the central axis C1. The at least one magnet 74 includes, for example, a first magnet 74A and a second magnet 74B. The second magnet 74B is disposed on the opposite side of the first magnet 74A with respect to the central axis C1 in the circumferential direction X3. The second magnet 74B is disposed on the opposite side of the first magnet 74A with respect to the central axis C1 in the radial direction X2, for example. In short, the first magnet 74A and the second magnet 74B are arranged on either side of the central axis C1.

At least one magnet 74 is arranged at a different position from at least one magnetic sensor 76 in the radial direction X2 relative to the central axis C1. At least one magnet 74 is arranged at a different position from at least one magnetic sensor 76 in the radial direction X2 without overlapping with at least one magnetic sensor 76. The magnet 74 is arranged, for example, radially outward from the magnetic sensor 76 in the radial direction X2. At least one magnet 74 is arranged at a different position from at least one magnetic sensor 76 in the axial direction X1 relative to the central axis C1. At least one magnet 74 is arranged at a different position from at least one magnetic sensor 76 in the axial direction X1 without overlapping with at least one magnetic sensor 76. The magnet 74 is arranged, for example, on the first axial direction A1 side of the magnetic sensor 76 in the axial direction X1. For example, the magnet 74 is arranged at a different position from the electric board 58A in the axial direction X1. The magnet 74 is arranged at a different position from the electric board 58A in the axial direction X1 without overlapping with the electric board 58A. The magnet 74 is arranged, for example, in the axial direction X1 on the first axial direction A1 side with respect to the electric board 58A. For example, at least one magnet 74 is arranged in a second region R2 that does not overlap with the first region R1 in the radial direction X2. The first region R1 is, for example, a circular region located on the inside in the radial direction X2 of the end of the magnet 74 located on the inside most in the radial direction X2. The second region R2 is a region located between the circle formed by the end of the magnet 74 located on the inside most in the radial direction X2 and the circle formed by the end of the magnet 74 located on the outside most in the radial direction X2. The first region R1 may be, for example, a circular region located on the outside in the radial direction X2 of the end of the magnet 74 located on the outside most in the radial direction X2.

<Arrangement of magnetic field generating component 72X, magnetic sensor 76, and magnet 74>
For example, the magnetic field generating component 72X and the magnetic sensor 76 are provided on the electric board 58A. The magnetic field of the magnetic field generating component 72X reaches the magnetic sensor 76 so as to affect the first magnetic sensor 76A and the second magnetic sensor 76B in the same manner. The first magnetic sensor 76A and the second magnetic sensor 76B are provided on the surface of the electric board 58A on which the magnetic field generating component 72X is provided. The first magnetic sensor 76A is disposed on the opposite side of the second magnetic sensor 76B with respect to the reference plane P1. The reference plane P1 includes the central axis C1 and passes through the magnetic field generating component 72X. The reference plane P1 includes, for example, the entire central axis C1. For example, the reference plane P1 passes through the center of the magnetic field generating component 72X. The magnetic field generating component 72X is provided on the electric board 58A so that the magnetic field is generated symmetrically with respect to the reference plane P1. For example, the first magnetic sensor 76A and the second magnetic sensor 76B are disposed symmetrically with respect to the reference plane P1. The first magnetic sensor 76A and the second magnetic sensor 76B are disposed symmetrically with respect to the reference plane P1. The first magnetic sensor 76A and the second magnetic sensor 76B are disposed such that a detection surface 76X of the first magnetic sensor 76A and a detection surface 76X of the second magnetic sensor 76B are symmetrically disposed with respect to the reference plane P1.

The first magnetic sensor 76A, the second magnetic sensor 76B, and the magnetic field generating component 72X are arranged on a predetermined plane P2. The predetermined plane P2 is a plane perpendicular to the reference plane P1. The predetermined plane P2 includes, for example, the surface of the electric board 58A on which the first magnetic sensor 76A, the second magnetic sensor 76B, and the magnetic field generating component 72X are provided. The first magnetic sensor 76A, the second magnetic sensor 76B, and the magnetic field generating component 72X are arranged on the predetermined plane P2 such that their respective centers form an isosceles triangle. In the isosceles triangle formed by the first magnetic sensor 76A, the second magnetic sensor 76B, and the magnetic field generating component 72X, the magnetic field generating component 72X is located at the apex of the apex angle, and the first magnetic sensor 76A and the second magnetic sensor 76B are located at the apex of the base angle.

For example, the first distance Z1 is equal to the second distance Z2. For example, the first distance Z1 is the distance from the first magnetic sensor 76A to the magnetic field generating component 72X. For example, the first distance Z1 is the shortest distance from the first magnetic sensor 76A to the magnetic field generating component 72X. For example, the first distance Z1 is the distance from the center of the detection surface 76X of the first magnetic sensor 76A to the center of the magnetic field generating component 72X. For example, the second distance Z2 is the distance from the second magnetic sensor 76B to the magnetic field generating component 72X. For example, the second distance Z2 is the shortest distance from the second magnetic sensor 76B to the magnetic field generating component 72X. For example, the second distance Z2 is the distance from the center of the detection surface 76X of the second magnetic sensor 76B to the magnetic field generating component 72X.

<Control unit 78>
As shown in FIG. 16 and FIG. 17, the control unit 78 is configured to determine the rotation of the second member 72B relative to the first member 72A according to the magnetism of the magnet 74 detected by the magnetic sensor 76. The control unit 78 includes an arithmetic processing unit that executes a predetermined control program. The arithmetic processing unit includes, for example, a CPU (Central Processing Unit) or an MPU (Micro Processing Unit). The control unit 78 may include one or more microcomputers. The control unit 78 may include a plurality of arithmetic processing units that are arranged at a plurality of locations. For example, the control unit 78 further includes a storage unit. The storage unit stores various control programs and information used in various control processes. The storage unit includes, for example, a non-volatile memory and a volatile memory. The non-volatile memory includes, for example, at least one of a ROM (Read-Only Memory), an EPROM (Erasable Programmable Read Only Memory), an EEPROM (Electrically Erasable Programmable Read-Only Memory), and a flash memory. The volatile memory includes, for example, a RAM (Random Access Memory).

The control unit 78 is electrically connected to the first magnetic sensor 76A and the second magnetic sensor 76B so that the magnetism detected by the first magnetic sensor 76A and the second magnetic sensor 76B is input as a signal. The control unit 78 is electrically connected to the external electric component 16 provided outside the hub assembly 20 via the output control circuit 78A. The control unit 78 outputs information regarding the rotation of the second member 72B relative to the first member 72A to the external electric component 16. The output control circuit 78A is electrically connected to the external electric component 16 via the electric cable 88. The electric component 58 and the external electric component 16 are electrically connected by the electric cable 88. The external electric component 16 includes, for example, a component for a human-powered vehicle different from the hub assembly 20. The external electric component 16 includes, for example, a drive unit for a human-powered vehicle. The output control circuit 78A is a circuit that operates so that the electrical output of the control unit 78 is stable. The control unit 78 is mounted on the electric board 58A so that power is supplied from the power generation unit 40 via, for example, a protection circuit 78B. The protection circuit 78B operates to stabilize the amount of power supplied to the control unit 78.

<Electric cable 88>
As shown in FIGS. 4 and 5 , for example, the electric cable 88 is electrically connected to the electric component 58. For example, the electric cable 88 is connected to the control unit 78. For example, the electric cable 88 transmits a signal from the magnetic sensor 76 to the outside of the hub assembly 20. For example, the electric cable 88 transmits power generated by the power generation unit 40 to the outside of the hub assembly 20. For example, the electric cable 88 is arranged along the hub axle 22 inside the hub shell 24. The electric cable 88 is arranged on the outer surface of the hub axle 22 so as to extend in the axial direction X1 of the hub axle 22 inside the hub shell 24. The outer surface of the hub axle 22 may be provided with a wiring portion 94 extending in the axial direction X1 for arranging the electric cable 88. The wiring portion 94 includes, for example, a groove 94A extending in the axial direction X1. The wiring portion 94 may be arranged inside the hub shell 24 so that the electric cable 88 passes through a hollow portion of the shaft member 26.

For example, the electric cable 88 has a first surface 88X facing radially inward in the housing portion 88A. The housing portion 88A is a portion of the electric cable 88 that is housed inside the hub shell 24. The housing portion 88A is, for example, a portion of the electric cable 88 that is housed inside the hub assembly 20. For example, the first surface 88X extends from the housing portion 88A to the exposed portion 88B. The exposed portion 88B is a portion of the electric cable 88 that is exposed to the outside of the hub shell 24. The exposed portion 88B is exposed to the outside of the hub assembly 20. For example, the electric cable 88 has a second surface 88Y opposite to the first surface 88X. For example, the second surface 88Y extends from the housing portion 88A to the exposed portion 88B.

<Cable guide portion 90>
As shown in Figs. 2 to 4, for example, the electric cable 88 is guided by the cable guide portion 90 so as to extend in the radial direction X2 outside the hub shell 24. For example, the electric cable 88 is guided by at least one cable guide portion 90 so as to extend in the radial direction X2 of the central axis C1. The cable guide portion 90 guides the electric cable 88 so as not to contact at least one of the hub shell 24 and the sprocket support 32. The at least one cable guide portion 90 is provided between the first frame abutting end surface 22B and the second frame abutting end surface 22C in the axial direction X1 and is configured to guide the electric cable 88. The cable guide portion 90 is configured to guide the electric cable 88 so as to pass between the frame 14 of the human-powered vehicle 10 and the end portion 26C of the shaft member 26 in the axial direction X1. The at least one cable guide portion 90 is at least partially provided in at least one end cap 28. For example, at least one cable guide portion 90 is provided on the end cap 28. The cable guide portion 90 of this embodiment is provided on the end cap 28X. In this embodiment, the cable guide portion 90 is provided on the first frame abutting end surface 22B and is a recessed portion extending from the first frame abutting end surface 22B toward the inside in the axial direction X1. When the shaft member 26 does not include an end cap 28, the cable guide portion 90 may be provided on the end portion 26C of the shaft member 26. A part of the cable guide portion 90 is disposed inside the end cap 28X in the axial direction X1, for example. The electric cable 88 is drawn from inside the end cap 28X through the recessed portion of the cable guide portion 90. When the electric cable 88 is drawn from the recessed portion of the cable guide portion 90, the electric cable 88 comes into contact with the end portion of the recessed portion of the cable guide portion 90. The portion of the cable guide portion 90 with which the electric cable 88 comes into contact is the abutting portion 90B. The electric cable 88 comes into contact with the abutment portion 90B, thereby preventing the electric cable 88 from coming into contact with a rotating body such as the sprocket support 32 or the hub shell 24. When the electric cable 88 is guided by the groove 94A and disposed up to the end of the hub axle 22, the hub assembly 20 may, for example, include a part that abuts against the second surface 88Y of the electric cable 88. The part that abuts against the second surface 88Y of the electric cable 88 includes an annular member through which the electric cable 88 and the hub axle 22 pass. For example, by attaching an annular part to the hub axle 22, the electric cable 88 can be prevented from separating from the hub axle 22. The annular part of the part that abuts against the second surface 88Y of the electric cable 88 has the function of the abutment portion 90B.

At least one cable guide portion 90 at least partially penetrates the hub axle 22 in the radial direction X2 relative to the central axis C1. For example, the cable guide portion 90 is provided in a hollow portion and penetrates the peripheral wall portion 22A. At least one cable guide portion 90 may be a hole that penetrates the peripheral wall portion 22A. For example, the at least one cable guide portion 90 is a notch portion 90A provided in at least one of the first frame abutting end surface 22B and the second frame abutting end surface 22C. The notch portion 90A is formed by cutting out a portion of the peripheral wall portion 22A across it.

For example, the cable guide portion 90 has an abutment portion 90B. The abutment portion 90B abuts the electric cable 88. The abutment portion 90B includes a portion of the inner surface of the end cap 28 that abuts against the guided portion of the electric cable 88. The abutment portion 90B is positioned so as to be located closer to the first axial direction A1 than the sprocket support 32. The cable guide portion 90 can guide the electric cable 88 by the abutment portion 90B so that the portion of the electric cable 88 that is guided in the radial direction X2 is located closer to the first axial direction A1 than the sprocket support 32.

<Auxiliary member 92>
As shown in FIGS. 2 to 4, the auxiliary member 92 is configured to guide at least a portion of the exposed portion 88B in the radial direction X2 relative to the central axis C1. The auxiliary member 92 is attached to the hub axle 22, for example. The auxiliary member 92 is attached to the end cap 28, for example. The auxiliary member 92 is disposed between the first frame abutment end surface 22B and the second frame abutment end surface 22C. For example, the auxiliary member 92 is formed by a linear member. For example, the hub axle 22 includes at least one of a hole 22X and a recess 22Y into which an end of the linear member is inserted. At least one of the hole 22X and the recess 22Y of the hub axle 22 is formed in the end cap 28, for example. The auxiliary member 92 is attached to the hub axle 22 by inserting an end of the linear member into at least one of the hole 22X and the recess 22Y. The hub axle 22 includes both the hole 22X and the recess 22Y.

20 and 21, for example, the auxiliary member 92 includes a hub axle mounting portion 92A. The hub axle mounting portion 92A is inserted into at least one of the hole 22X and the recess 22Y of the hub axle 22. For example, the auxiliary member 92 includes a first cable support portion 92B. The first cable support portion 92B contacts the first surface 88X. For example, the auxiliary member 92 includes a second cable support portion 92C. The second cable support portion 92C contacts the second surface 88Y. The hub axle mounting portion 92A, the first cable support portion 92B, and the second cable support portion 92C are integrally formed by a linear member.

For example, the auxiliary member 92 is configured to be switchable from one of the first state and the second state to the other. In FIG. 21, the auxiliary member 92 in the first state is shown by a solid line. For example, the first state is a state in which at least a part of the exposed portion 88B of the electric cable 88 is guided in the radial direction X2. In the first state, the auxiliary member 92 guides the electric cable 88 in the radial direction X2 so that the exposed portion 88B moves away from the central axis C1. In FIG. 21, the auxiliary member 92 in the second state is shown by a two-dot chain line. For example, in the second state, the auxiliary member 92 guides at least a part of the exposed portion 88B of the electric cable 88 in the axial direction X1. In the second state, the auxiliary member 92 guides the electric cable 88 inward in the radial direction X2 so that the exposed portion 88B approaches the central axis C1. In the second state, the auxiliary member 92 guides the exposed portion 88B of the electric cable 88 in the axial direction X1.

For example, when the hub assembly 20 is attached to the frame 14, the auxiliary member 92 is set to the first state. For example, when the sprocket 12 is attached to the sprocket support 32, and when the sprocket 12 is removed from the sprocket support 32, the auxiliary member 92 is set to the second state. Switching between the first state and the second state is achieved, for example, by an operator pushing or pulling the auxiliary member 92.

<Method of Assembling Hub Assembly 20>
The shaft member 26 is provided with a tool engagement portion 84 on a surface 84A facing the axial direction X1 of an end portion 26C of the shaft member 26 in the axial direction X1 relative to the central axis C1 of the shaft member 26. The surface 84A facing the axial direction X1 is, for example, an end face of the shaft member 26. The tool engagement portion 84 is engageable with a tool T2.

For example, the tool engagement portion 84 includes at least one recess 86 recessed in the axial direction X1. For example, the recess 86 includes a tool engagement surface 84B facing the axial direction X1. At least a portion of the tool engagement surface 84B is formed perpendicular to the axial direction X1. For example, the at least one recess 86 continues from the outer surface 26B to the inner surface 26A in the radial direction X2. The recess 86, for example, opens at least in the radial direction X2. The recess 86, for example, opens in the axial direction X1.

19, for example, at least one recess 86 includes a first recess 86A and a second recess 86B. For example, the second recess 86B is disposed on the opposite side of the first recess 86A with respect to the central axis C1 in the circumferential direction X3 with respect to the central axis C1. The second recess 86B is disposed on the opposite side of the first recess 86A with respect to the central axis C1 in the radial direction X2, for example. The first recess 86A and the second recess 86B are disposed so as to sandwich the central axis C1. In this embodiment, the recess 86 of the tool engagement portion 84 includes a positioning recess 82B in which the positioning member 80 shown in FIG. 7 is disposed. The positioning member 80 is attached to the end cap 28X and disposed in the tool engagement portion 84. The second portion 80B of the positioning member 80 is disposed in the recess 86 of the tool engagement portion 84. The recess 86 of the tool engagement portion 84 may be provided separately from the positioning recess 82B.

The method of assembling the hub assembly 20 will be described with reference to Figures 4, 5, 9, and 22. The method of assembling the hub assembly 20 includes a first step, a second step, a third step, a fourth step, a fifth step, and a sixth step.

The first step is a step in which the power generation unit 40 and the housing restriction member 62X are placed on the shaft member 26. In the first step, the power generation unit 40 is attached to the second shaft portion 26Y of the shaft member 26, and then the housing restriction member 62X is attached to the power generation unit 40.

The second step is a step of placing the housing 62 on the shaft member 26. In the second step, the housing 62 is placed on the first shaft portion 26X of the shaft member 26 from the radial direction X2, and then the housing 62 is attached to the housing regulating member 62X. The lead wire 50B drawn from the winding 50A is electrically connected to the housing 62. The electrical cable 88 is connected to the connector 70 of the housing 62.

The third step is to place the hub shell 24 on the shaft member 26. The hub shell 24, which has the magnet 44, the back yoke 42C, and the additional bearing 30A attached to its inner surface, is placed on the shaft member 26.

The fourth step is a step in which the additional end cap 30 is attached to the shaft member 26. In the fourth step, the position in the axial direction X1 of the additional bearing 30A arranged on the inner surface of the hub shell 24 is determined. In the fourth step, the tool T2 engages with the tool engagement portion 84, thereby suppressing rotation of the shaft member 26 at least in the circumferential direction X3. The additional end cap 30 is attached to the shaft member 26 in a state in which rotation of the shaft member 26 in the circumferential direction X3 is suppressed. Since the tool engagement portion 84 can suppress rotation of the shaft member 26 in the circumferential direction X3, it is easy to attach the additional end cap 30 to the shaft member 26.

The fifth step is a step in which the torque transmission structure 36 is attached to the housing 62. In the fifth step, with the splines of the tool T1 engaged with the tool engagement portion 36C, the tool T1 rotates in the circumferential direction X3, thereby attaching the torque transmission structure 36 to the housing 62.

The sixth step is a step in which the end cap 28X is attached to the shaft member 26. In the sixth step, the electrical cable 88 connected to the connector 70 passes through the hollow portion of the end cap 28X and is pulled out to the outside of the hub shell 24. The end cap 28X is attached to the shaft member 26 with the electrical cable 88 passing through the hollow portion of the end cap 28X.

<Method of Determining Rotation by the Control Unit 78>
A method of determining rotation by the control unit 78 will be described with reference to FIGS.
The magnetic sensor 76 is configured to, for example, output a detection signal to the control unit 78 when it detects magnetism, and to output a non-detection signal to the control unit 78 when it does not detect magnetism. The magnetic sensor 76 is configured to, for example, output a detection signal to the control unit 78 when the magnetic flux density input to the detection surface 76X is equal to or greater than a predetermined threshold. The magnetic sensor 76 is configured to, for example, output a non-detection signal to the control unit 78 when the magnetic flux density input to the detection surface 76X is smaller than a predetermined threshold. The detection signal and the non-detection signal may be voltage values. One of the detection signal and the non-detection signal may be a high signal, and the other of the detection signal and the non-detection signal may be a low signal. The low signal may be 0 V. The control unit 78 is configured to determine the rotation of the second member 72B relative to the first member 72A according to changes in the outputs from the first magnetic sensor 76A and the second magnetic sensor 76B.

When the second member 72B rotates, the detection timing of the magnetism of the magnet 74 by the first magnetic sensor 76A is different from the detection timing of the magnetism of the magnet 74 by the first magnetic sensor 76A. The difference between the detection timing of the magnetism of the magnet 74 by the first magnetic sensor 76A and the detection timing of the magnetism of the magnet 74 by the second magnetic sensor 76B corresponds to the phase difference between the first magnetic sensor 76A and the second magnetic sensor 76B with respect to the central axis C1. In short, the difference between the detection timing of the magnetism of the magnet 74 by the first magnetic sensor 76A and the detection timing of the magnetism of the magnet 74 by the second magnetic sensor 76B corresponds to the positions of the first magnetic sensor 76A and the second magnetic sensor 76B in the circumferential direction X3. The phase difference between the first magnetic sensor 76A and the second magnetic sensor 76B with respect to the central axis C1 is, for example, smaller than the phase difference between the first magnet 74A and the second magnet 74B with respect to the central axis C1. The phase difference between the first magnet 74A and the second magnet 74B with respect to the central axis C1 is, for example, 180 degrees.

When the second member 72B rotates, the first magnetic sensor 76A may be configured to output a detection signal for a first predetermined period. When the second member 72B rotates, the second magnetic sensor 76B may be configured to output a detection signal for a second predetermined period. For example, the first predetermined period is substantially equal to the second predetermined period. The phase difference between the first magnetic sensor 76A and the second magnetic sensor 76B with respect to the central axis C1 is set, for example, so that when the first magnetic sensor 76A outputs a detection signal, the output of the second magnetic sensor 76B changes from a non-detection signal to a detection signal.

In FIG. 23, the change in magnetic flux density input to the detection surface 76X of the first magnetic sensor 76A is shown by a solid line, and the change in magnetic flux density input to the detection surface 76X of the second magnetic sensor 76B is shown by a two-dot chain line.

Time t11 indicates the time when the magnetic flux density input to the detection surface 76X of the first magnetic sensor 76A becomes equal to or greater than a predetermined threshold value as a result of the second member 72B rotating in a predetermined direction. At time t11, the output of the first magnetic sensor 76A changes from a non-detection signal to a detection signal. At time t11, the magnetic flux density input to the detection surface 76X of the second magnetic sensor 76B is less than the predetermined threshold value, so the output of the second magnetic sensor 76B is a non-detection signal.

Time t12 indicates the time when the magnetic flux density input to the detection surface 76X of the second magnetic sensor 76B becomes equal to or greater than the predetermined threshold value as a result of the second member 72B further rotating in the predetermined direction. At time t12, the output of the second magnetic sensor 76B changes from a non-detection signal to a detection signal. At time t12, the magnetic flux density input to the detection surface 76X of the first magnetic sensor 76A is maintained at or greater than the predetermined threshold value, so the output of the first magnetic sensor 76A is maintained as a detection signal.

Time t13 indicates the time when the magnetic flux density input to the detection surface 76X of the first magnetic sensor 76A becomes less than the predetermined threshold value due to further rotation of the second member 72B in the predetermined direction. At time t13, the output of the first magnetic sensor 76A changes from a detection signal to a non-detection signal. At time t13, the magnetic flux density input to the detection surface 76X of the second magnetic sensor 76B is maintained above the predetermined threshold value, so the output of the second magnetic sensor 76B is maintained as a detection signal.

Time t14 indicates the time when the magnetic flux density input to the detection surface 76X of the second magnetic sensor 76B becomes less than the predetermined threshold value due to further rotation of the second member 72B in the predetermined direction. At time t14, the output of the second magnetic sensor 76B changes from a detection signal to a non-detection signal. At time t14, the magnetic flux density input to the detection surface 76X of the first magnetic sensor 76A is maintained below the predetermined threshold value, so the output of the first magnetic sensor 76A is maintained as a non-detection signal.

Figure 23 shows the case where the second member 72B rotates in a predetermined direction relative to the first member 72A, but when the second member 72B rotates in a direction opposite to the predetermined direction relative to the first member 72A, the magnetic flux density input to the detection surface 76X of the first magnetic sensor 76A, the magnetic flux density input to the detection surface 76X of the second magnetic sensor 76B, the output of the first magnetic sensor 76A, and the output of the second magnetic sensor 76B change from time t14 to time t11.

The control unit 78 is configured to determine the rotation of the second member 72B relative to the first member 72A, for example, according to the output of the first magnetic sensor 76A when the output of the second magnetic sensor 76B changes. The control unit 78 determines that the second member 72B is rotating in a predetermined direction relative to the first member 72A when the change in the output of the first magnetic sensor 76A and the second magnetic sensor 76B is a first pattern. The control unit 78 determines that the second member 72B is rotating in a direction opposite to the predetermined direction relative to the first member 72A when the change in the output of the first magnetic sensor 76A and the second magnetic sensor 76B is a second pattern. The control unit 78 is configured not to determine the rotation of the second member 72B relative to the first member 72A, for example, when the change in the output of the first magnetic sensor 76A and the second magnetic sensor 76B is different from either the first pattern or the second pattern.

The first pattern is a pattern in which the output of the first magnetic sensor 76A is a detection signal when the output of the second magnetic sensor 76B changes from a non-detection signal to a detection signal, and the output of the first magnetic sensor 76A is a non-detection signal when the output of the second magnetic sensor 76B changes from a detection signal to a non-detection signal. In the first pattern, when the output of the second magnetic sensor 76B changes from a non-detection signal to a detection signal at time t12, the output of the first magnetic sensor 76A is a detection signal. Thereafter, when the output of the second magnetic sensor 76B changes from a detection signal to a non-detection signal at time t14, the output of the first magnetic sensor 76A is a non-detection signal.

The second pattern is a pattern in which the output of the first magnetic sensor 76A is a non-detection signal when the output of the second magnetic sensor 76B changes from a non-detection signal to a detection signal, and the output of the first magnetic sensor 76A is a detection signal when the output of the second magnetic sensor 76B changes from a detection signal to a non-detection signal. In the second pattern, when the output of the second magnetic sensor 76B changes from a non-detection signal to a detection signal at time t14, the output of the first magnetic sensor 76A is a non-detection signal. Thereafter, when the output of the second magnetic sensor 76B changes from a detection signal to a non-detection signal at time t12, the output of the first magnetic sensor 76A is a detection signal.

An example of control in which the control unit 78 determines the rotation direction of the second member 72B relative to the first member 72A will be described with reference to FIG. 24. For example, when power is supplied to the control unit 78, the control unit 78 starts the process of step S11. For example, when the process of FIG. 24 ends, the control unit 78 starts the process of step S11 again after a predetermined period of time.

In step S11, the control unit 78 determines whether the output of the second magnetic sensor 76B has changed from a non-detection signal to a detection signal. If the output of the second magnetic sensor 76B has not changed from a non-detection signal to a detection signal, the control unit 78 ends the process. If the output of the second magnetic sensor 76B has changed from a non-detection signal to a detection signal, the control unit 78 proceeds to step S12.

In step S12, the control unit 78 determines whether the output of the first magnetic sensor 76A is a detection signal. If the output of the first magnetic sensor 76A is a detection signal, the control unit 78 proceeds to step S13. If the output of the first magnetic sensor 76A is not a detection signal, the control unit 78 proceeds to step S16.

In step S13, the control unit 78 determines whether the output of the second magnetic sensor 76B has changed from a detection signal to a non-detection signal. If the output of the second magnetic sensor 76B has not changed from a detection signal to a non-detection signal, the control unit 78 executes the process of step S13 again. If the output of the second magnetic sensor 76B has changed from a detection signal to a non-detection signal, the control unit 78 proceeds to step S14.

In step S14, the control unit 78 determines whether the output of the first magnetic sensor 76A is a non-detection signal. If the output of the first magnetic sensor 76A is a non-detection signal, the control unit 78 proceeds to step S15. If the output of the first magnetic sensor 76A is not a non-detection signal, the control unit 78 ends the process. In step S15, the control unit 78 determines that the second member 72B is rotating in a predetermined direction relative to the first member 72A, and then ends the process. If the output of the first magnetic sensor 76A is not a non-detection signal in step S14, the control unit 78 does not determine the rotation direction of the second member 72B relative to the first member 72A.

In step S16, the control unit 78 determines whether the output of the second magnetic sensor 76B has changed from a detection signal to a non-detection signal. If the output of the second magnetic sensor 76B has not changed from a detection signal to a non-detection signal, the control unit 78 executes the process of step S16 again. If the output of the second magnetic sensor 76B has changed from a detection signal to a non-detection signal, the control unit 78 proceeds to step S17.

In step S17, the control unit 78 determines whether the output of the first magnetic sensor 76A is a detection signal. If the output of the first magnetic sensor 76A is a detection signal, the control unit 78 proceeds to step S18. If the output of the first magnetic sensor 76A is not a detection signal, the control unit 78 ends the process. In step S18, the control unit 78 determines that the second member 72B is rotating in the opposite direction to the predetermined direction relative to the first member 72A, and ends the process. If the output of the first magnetic sensor 76A is not a detection signal in step S17, the control unit 78 does not determine the rotation direction of the second member 72B relative to the first member 72A.

Second Embodiment
A hub assembly 20 of the second embodiment will be described with reference to Figure 25. The hub assembly 20 of the second embodiment is similar to the hub assembly 20 of the first embodiment except for the configurations of the power generation device 42 and the housing 62. Therefore, the same reference numerals as in the first embodiment are used for the configurations in common with the first embodiment, and duplicated descriptions will be omitted.

<Power generation device 42>
The power generating device 42 of the present embodiment includes a bobbin 46, a winding 50A, a lead wire 50B, an electric component 58, and a conductor 96. The power generating device 42 of the present embodiment is similar to the power generating device 42 of the first embodiment, except that the power generating device 42 of the present embodiment includes the electric component 58 and the conductor 96.

<Conductor 96>
For example, the conductor 96 extends in the axial direction X1 relative to the central axis C1 of the bobbin 46. The conductor 96 is attached to the first flange 46B of the bobbin 46 and configured to extend from the first flange 46B beyond the restricting member 52. The conductor 96 is configured to protrude in the first axial direction A1. The conductor 96 is attached to the protruding portion 48. As long as the conductor 96 can extend from the first flange 46B beyond the restricting member 52, it does not have to be attached to at least one of the first protruding portion 48A and the second protruding portion 48B.

The conductor 96 includes a first portion 96X and a second portion 96Y. The conductor 96 electrically connects the lead wire 50B to the first portion 96X and the electrical component 58 to the second portion 96Y, thereby electrically connecting the lead wire 50B and the electrical component 58. For example, the first portion 96X is provided on the protruding portion 48 of the first flange 46B. The lead wire 50B is electrically connected to the first portion 96X by being extended to the protruding portion 48.

The conductor 96 is at least one of a connector pin 96A, a socket 96B, and a bus bar. The conductor 96 has a higher rigidity than, for example, the electric cable 88. At least one of the connector pin 96A, the socket 96B, and the bus bar protrudes from the first flange 46B in the first axial direction A1 so as to be parallel to the axial direction X1. In this embodiment, the conductor 96 is a connector pin 96A. The connector pin 96A includes, for example, an exposed electrode. The connector pin 96A is electrically connected to the socket 96B by, for example, inserting the exposed electrode into the socket 96B.

<Electrical component 58>
The electric component 58 of this embodiment includes a socket 96B connected to the second portion 96Y. The electric component 58 of this embodiment is similar to the electric component 58 of the first embodiment, except for including the socket 96B. The socket 96B is connected to the second portion 96Y of the connector pin 96A. The socket 96B is provided on the additional electric board 58Y such that the socket 96B faces the second axial direction A2 and overlaps with the connector pin 96A when viewed from the axial direction X1. The socket 96B is disposed so that the connector pin 96A and the socket 96B can be connected to each other by moving the housing 62 in the second axial direction A2 with respect to the power generation device 42 disposed on the shaft member 26.

<Housing 62>
In the housing 62 of this embodiment, a through hole 62E is provided in the end wall 62C in the axial direction X1. The housing 62 of this embodiment is similar to the housing 62 of the first embodiment, except that the through hole 62E is provided in the end wall 62C. The connector pin 96A passes through the through hole 62E. The connector pin 96A protrudes from the end wall 62C in the first axial direction A1, for example, through the through hole 62E. The connector pin 96A protrudes into the accommodating portion 64 with respect to the end wall 62C in the axial direction X1, for example, through the through hole 62E. A part of the socket 96B may protrude outside the housing 62 through the through hole 62E. When a part of the socket 96B protrudes outside the housing 62, the connector pin 96A does not protrude from the end wall 62C in the first axial direction A1, but connects to the socket 96B on the second axial direction A2 side with respect to the end wall 62C.

<Example of change>
The description of each embodiment is merely an example of a form that the hub assembly according to the present disclosure may take, and is not intended to limit the form. The hub assembly according to the present disclosure may take a form that is a combination of at least two mutually non-conflicting modified examples of each embodiment shown below, for example. In the modified examples below, parts that are common to the embodiments are given the same reference numerals as in the embodiments, and descriptions thereof are omitted.

The restricting member 52 may be attached to the shaft member 26 by a method other than welding. The restricting member 52 may be attached to the shaft member 26 by a part other than the restricting member 52, such as a screw or a nut.

- The lead wire guide portion 54 may be provided separately from the bobbin 46. When the lead wire guide portion 54 is provided separately from the bobbin 46, the lead wire guide portion 54 may be attached to the bobbin 46 so that it can be removed from the bobbin 46. When the lead wire guide portion 54 is provided separately from the bobbin 46, the lead wire guide portion 54 may be provided in the lead wire guide arrangement portion 56 of the regulating member 52, rather than in the bobbin 46.

- The method of attachment of the connection part 36A to the hub shell 24 may be changed as appropriate, so long as the connection part 36A is attached to the hub shell 24 so as not to rotate relative to the hub shell 24. The connection part 36A is attached to the hub shell 24 by, for example, press fitting or serration fitting.

- The method of attaching the connecting portion 36A to the second one-way clutch portion 38B may be changed as appropriate, so long as the connecting portion 36A is attached to the second one-way clutch portion 38B so as to be unable to rotate relative to the second one-way clutch portion 38B. The connecting portion 36A may be attached to the second one-way clutch portion 38B by, for example, press-fitting or serration fitting.

- As shown in FIG. 26, the first one-way clutch portion 38A may be disposed inward of at least a portion of the second one-way clutch portion 38B in the radial direction X2. In this modified example, the second one-way clutch portion 38B corresponds to the connection portion 36A. The second one-way clutch portion 38B is coupled to the hub shell 24, for example, by a screw. In this modified example, the tool engagement portion 36C is provided on the outer surface of the second one-way clutch portion 38B. The second one-way clutch portion 38B in this modified example includes a protrusion 36B. In this modified example, the tool engagement portion 36C is provided on the outer surface of the protrusion 36B of the second one-way clutch portion 38B.

- As shown in FIG. 27, the torque transmission structure 36 does not have to include a one-way clutch 38. In the example shown in FIG. 27, the connection portion 36A and the sprocket support 32 are integrally formed. The torque transmission structure 36 of this modified example transmits torque from the sprocket support 32 to the hub shell 24. The torque transmission structure 36 of this modified example transmits torque from the hub shell 24 to the sprocket support 32.

- The generator 42 may have a first member 42A that includes the hub shell 24 and a second member 42B that includes the shaft member 26. When the first member 42A includes the hub shell 24 and the second member 42B includes the shaft member 26, the magnet 44 is attached to the shaft member 26 and the magnetic shield member 60 extends outward from the outer surface 26B of the shaft member 26 in the radial direction X2.

- The rotating device 72 may have a first member 72A that includes at least one of the hub shell 24 and the sprocket support 32, and a second member 72B that is the shaft member 26. A magnetic sensor 76 provided on at least one of the hub shell 24 and the sprocket support 32 detects a magnet 74 provided on the shaft member 26.

- The magnetic shield member 60 does not have to be arranged around the entire circumference in the circumferential direction X3. For example, when viewed from the axial direction X1, at least a portion of the magnetic shield member 60 may be located between the magnet 44 and the electrical component 58. When at least a portion of the magnetic shield member 60 is located between the magnet 44 and the electrical component 58 when viewed from the axial direction X1, the magnetic shield member 60 may be attached to the electrical component 58. When the magnetic shield member 60 is attached to the electrical component 58, for example, the magnetic shield member 60 is provided in a portion of the electrical component 58 that requires magnetic shielding.

- The magnetic shield member 60 may be positioned so as not to come into contact with the magnet 44, provided that it is positioned between the magnet 44 and the electrical component 58 in the axial direction X1.

- The magnetic shield member 60 may be formed separately from the back yoke 42C, as long as the magnetic shield member 60 can be magnetically connected to the back yoke 42C. If the magnetic shield member 60 is formed separately from the back yoke 42C, the magnetic shield member 60 does not need to contact the back yoke 42C.

- The recess 86 of the tool engagement portion 84 of the end portion 26C of the shaft member 26 does not have to be continuous from the outer surface 26B to the inner surface 26A in the radial direction X2, as long as the tool T2 can be engaged. The recess 86 of the tool engagement portion 84 is continuous, for example, from the outer surface 26B in the radial direction X2 to a position between the outer surface 26B and the inner surface 26A in the radial direction X2. The recess 86 of the tool engagement portion 84 is continuous, for example, from the inner surface 26A in the radial direction X2 to a position between the outer surface 26B and the inner surface 26A in the radial direction X2.

The positioning member 80 may be formed integrally with one of the end cap 28 and the shaft member 26. When the positioning member 80 is formed integrally with one of the end cap 28 and the shaft member 26, for example, the positioning member 80 is formed as a convex portion provided on one of the end cap 28 and the shaft member 26. When the positioning member 80 is formed as a convex portion provided on one of the end cap 28 and the shaft member 26, the other of the end cap 28 and the shaft member 26 may include a concave portion that fits with the convex portion.

- The opening dimension D4 of the opening 68 may be equal to or smaller than the dimension D1 of the first shaft portion 26X in the radial direction X2, as long as the shaft member 26 can pass through so that it can be received in the shaft member receiving portion 66. When the opening dimension D4 of the opening 68 is equal to or smaller than the dimension D1 of the first shaft portion 26X, for example, the housing 62 may be deformable so as to flex.

- The cross-sectional shape of the shaft member 26 in a direction perpendicular to the central axis C1 may be non-circular. When the cross-sectional shape of the shaft member 26 in a direction perpendicular to the central axis C1 is non-circular, the opening dimension D4 of the opening 68 may be equal to or smaller than the maximum dimension of the shaft member 26. A non-circular cross-sectional shape is, for example, a shape having a straight line in part. An example of a shape having a straight line in part is a D-shape. When the cross-sectional shape of the shaft member 26 in a direction perpendicular to the central axis C1 is a D-shape, a first dimension in a direction perpendicular to the straight portion of the D-shape is different from a second dimension in a direction parallel to the straight portion of the D-shape. For example, when the second dimension is the maximum dimension of the shaft member 26, the opening dimension D4 of the opening 68 may be greater than the first dimension and equal to or smaller than the second dimension.

- In the second embodiment, the conductor 96 may be at least one of a socket 96B and a bus bar instead of or in addition to the connector pin 96A. When the conductor 96 is a socket 96B, the electrical component 58 includes a connector pin 96A connected to a second portion 96Y of the socket 96B. When the conductor 96 is a bus bar, the electrical component 58 includes a connector 70 connected to the second portion 96Y of the bus bar.

As shown in FIG. 28, the lead wire 50B may be electrically connected to the first portion 96X by being wound around the first portion 96X.

The power generating device 42 includes a bobbin 46, a winding 50A wound around the bobbin 46, a lead wire 50B electrically connected to the winding 50A, a restricting member 52 adjacent to the first bobbin end 46X of the bobbin 46 in the axial direction X1 relative to the central axis C1 of the bobbin 46 and restricting movement of the bobbin 46 in the axial direction X1, and at least one lead wire guide portion 54 in which at least a portion of the lead wire 50B is arranged and which extends in the axial direction X1. As long as the restricting member 52 is provided with a lead wire guide arrangement portion 56 in which at least a portion of the at least one lead wire guide portion 54 is arranged, other configurations may be omitted.

The power generating device 42 includes a bobbin 46, a winding 50A wound around the bobbin 46, a lead wire 50B electrically connected to the winding 50A, and at least one lead wire guide portion 54 in which at least a portion of the lead wire 50B is arranged and which extends in the axial direction X1 relative to the central axis C1 of the bobbin 46. The bobbin 46 includes a winding arrangement portion 46A in which the winding 50A is arranged, and a first fin extending radially outward relative to the central axis C1 of the bobbin 46 from an end of the winding arrangement portion 46A in the axial direction X1. The axial direction X1 includes a first axial direction A1 from the winding arrangement section 46A toward the first flange 46B, the first flange 46B includes a plurality of protrusions 48 protruding in the first axial direction A1, the plurality of protrusions 48 include a first protrusion 48A and a second protrusion 48B that protrudes in the first axial direction A1 more than the first protrusion 48A, and at least one lead wire guide section 54 is provided on the second protrusion 48B, so long as other configurations are omitted.

The power generating device 42 includes a bobbin 46, a winding 50A wound around the bobbin 46, a lead wire 50B electrically connected to the winding 50A, an electrical component 58, and a conductor 96, the conductor 96 being at least one of a connector pin 96A, a socket 96B, and a bus bar, and including a first portion 96X and a second portion 96Y, and the lead wire 50B is electrically connected to the first portion 96X, and the electrical component 58 is electrically connected to the second portion 96Y, so long as the lead wire 50B and the electrical component 58 are electrically connected, other configurations may be omitted.

The hub assembly 20 includes a shaft member 26 having a central axis C1, a hub shell 24 rotatably arranged around the central axis C1, a sprocket support 32 rotatably arranged around the central axis C1 and having at least one sprocket 12 attached thereto, a torque transmission structure 36 that transmits torque from one of the sprocket support 32 and the hub shell 24 to the other of the sprocket support 32 and the hub shell 24, and a tool engagement portion 36C provided on the torque transmission structure 36 and configured to be able to engage a tool T1 from outside the hub shell 24. As long as the tool engagement portion 36C is located radially outward of the sprocket support 32 in the radial direction X2 relative to the central axis C1, other components may be omitted.

The hub assembly 20 includes a shaft member 26 having a central axis C1, a hub shell 24 rotatably arranged around the central axis C1, a sprocket support 32 rotatably arranged around the central axis C1 and having at least one sprocket 12 attached thereto, a torque transmission structure 36 that transmits torque from one of the sprocket support 32 and the hub shell 24 to the other of the sprocket support 32 and the hub shell 24, and a tool engagement portion 36C that is provided on the torque transmission structure 36 and is configured to be able to engage a tool T1 from outside the hub shell 24. The sprocket support 32 has a sprocket engagement portion 32A that engages with the sprocket 12. As long as the tool engagement portion 36C is located closer to the hub shell 24 than the sprocket engagement portion 32A in the axial direction X1 relative to the central axis C1, other components may be omitted.

- The power generating device 42 includes a first member 42A having a central axis C1, a second member 42B that is rotatable around the central axis C1 relative to the first member 42A, a magnet 44 attached to the second member 42B, an electrical component 58 that is positioned at a different position from the magnet 44 in the axial direction X1 relative to the central axis C1, and a magnetic shield member 60 that, when viewed from the axial direction X1, at least a portion of which overlaps with the magnet 44, is positioned between the magnet 44 and the electrical component 58 in the axial direction X1, and extends in the radial direction X2 relative to the central axis C1. Other components may be omitted.

- The hub assembly 20 comprises a hub axle 22 including a shaft member 26 that rotatably supports a hub shell 24, and the shaft member 26 has a tool engagement portion 84 that can engage with a tool T2 on a surface 84A of an end portion 26C of the shaft member 26 facing the axial direction X1 relative to a central axis C1 of the shaft member 26. Other configurations may be omitted.

The hub assembly 20 comprises a hub axle 22 including a shaft member 26, an end cap 28, and a positioning member 80 having a first portion 80A and a second portion 80B different from the first portion 80A, the shaft member 26 includes an end portion 26C to which the end cap 28 is attached in an axial direction X1 relative to a central axis C1 of the shaft member 26, the positioning member 80 is configured to determine the position of the end cap 28 relative to the shaft member 26 in a circumferential direction X3 relative to the central axis C1, the end cap 28 has a first positioning portion 28A in which the first portion 80A is disposed, and the end portion 26C has a second positioning portion 26D in which the second portion 80B is disposed, so long as other configurations are omitted.

The rotating device 72 includes a first member 72A having a central axis C1, a second member 72B that rotates relative to the first member 72A around the central axis C1, a magnet 74 provided on the second member 72B, a magnetic sensor 76 that is configured not to rotate relative to the first member 72A and detects the magnetism of the magnet 74, and a magnetic generating part 72X that is configured not to rotate relative to the first member 72A and is different from the magnet 74. The magnetic sensor 76 includes a first magnetic sensor 76A and a second magnetic sensor 76B that detects the magnetism of the magnet 74 independently of the first magnetic sensor 76A. The first magnetic sensor 76A is disposed on the opposite side to the second magnetic sensor 76B with respect to a reference plane P1 that includes the central axis C1 and passes through the magnetic generating part 72X. Other configurations may be omitted.

The rotating device 72 includes a first member 72A having a central axis C1, a second member 72B that rotates relative to the first member 72A around the central axis C1, at least one magnet 74 provided on the second member 72B, and at least one magnetic sensor 76 that is configured not to rotate relative to the first member 72A and detects the magnetism of the magnet 74. As long as the at least one magnet 74 is arranged at a different position from the at least one magnetic sensor 76 in the axial direction X1 relative to the central axis C1 and the at least one magnet 74 is arranged at a different position from the at least one magnetic sensor 76 in the radial direction X2 relative to the central axis C1, other configurations may be omitted.

The rotating device 72 includes a first member 72A having a central axis C1, a second member 72B that rotates relative to the first member 72A around the central axis C1, at least one magnet 74 provided on the second member 72B, and at least one magnetic sensor 76 that is configured to be unable to rotate relative to the first member 72A and has a detection surface 76X that detects the magnetism of the magnet 74, and the at least one magnet 74 is arranged at a different position from the at least one magnetic sensor 76 in the axial direction X1 relative to the central axis C1, and the detection surface 76X is arranged non-perpendicular to the magnetization direction M1 in which the south pole and north pole of the at least one magnet 74 are aligned, so long as other components are omitted.

The hub assembly 20 includes a hub axle 22 that rotatably supports the hub shell 24 and has a central axis C1, and an electric cable 88. The hub axle 22 includes a first frame abutment end face 22B, a second frame abutment end face 22C that is opposite the first frame abutment end face 22B in the axial direction X1 relative to the central axis C1, and at least one cable guide portion 90 that is provided between the first frame abutment end face 22B and the second frame abutment end face 22C in the axial direction X1 and is configured to guide the electric cable 88. As long as the at least one cable guide portion 90 penetrates the hub axle 22 at least partially in the axial direction X1 and in the radial direction X2 relative to the central axis C1, other configurations may be omitted.

The hub assembly 20 rotatably supports the hub shell 24, has a central axis C1, and includes a hub axle 22 including an axle member 26 and at least one end cap 28 attached to an end 26C of the axle member 26 in an axial direction X1 relative to the central axis C1, and an electric cable 88. The hub axle 22 includes a first frame abutment end face 22B, a second frame abutment end face 22C opposite the first frame abutment end face 22B in the axial direction X1, and at least one cable guide portion provided between the first frame abutment end face 22B and the second frame abutment end face 22C in the axial direction X1 and configured to guide the electric cable 88. As long as the at least one cable guide portion 90 is provided at least partially on the at least one end cap 28, other configurations may be omitted.

The hub assembly 20 includes a hub axle 22 that rotatably supports the hub shell 24 and has a central axis C1, an electric cable 88, and an auxiliary member 92 configured to guide at least a portion of an exposed portion 88B of the electric cable 88 that is exposed to the outside of the hub shell 24 in a radial direction X2 relative to the central axis C1. The hub axle 22 includes a first frame abutment end face 22B, a second frame abutment end face 22C that is opposite the first frame abutment end face 22B in the axial direction X1 relative to the central axis C1, and at least one cable guide portion 90 that is provided between the first frame abutment end face 22B and the second frame abutment end face 22C in the axial direction X1 and is configured to guide the electric cable 88. As long as the auxiliary member 92 is disposed between the first frame abutment end face 22B and the second frame abutment end face 22C, other configurations may be omitted.

The hub assembly 20 includes a shaft member 26 having a central axis C1, an electrical component 58, and a housing 62 that accommodates at least a portion of the electrical component 58. The housing 62 includes a shaft member receiving portion 66 that receives the shaft member 26, and an opening 68 that is connected to the shaft member receiving portion 66 in the radial direction X2 relative to the central axis C1. Other configurations may be omitted.

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.

10...human-powered vehicle, 20...hub assembly, 24...hub shell, 26...shaft member, 42...power generating device, 42A...first member, 42B...second member, 42C...back yoke, 44...magnet, 58...electrical component, 58A...electrical board, 60...magnetic shield member, 74X...magnetic component, 76...magnetic sensor.

The fifth step is a step of attaching the torque transmission structure 36 to the housing 62. In the fifth step, with the splines of the tool T1 engaged with the tool engagement portion 36C, the tool T1 is rotated in the circumferential direction X3, thereby attaching the torque transmission structure 36 to the hub shell 24 .

When the second member 72B rotates, the timing at which the first magnetic sensor 76A detects the magnetism of the magnet 74 is different from the timing at which the second magnetic sensor 76B detects the magnetism of the magnet 74. The difference between the timing at which the first magnetic sensor 76A detects the magnetism of the magnet 74 and the timing at which the second magnetic sensor 76B detects the magnetism of the magnet 74 corresponds to the phase difference between the first magnetic sensor 76A and the second magnetic sensor 76B with respect to the central axis C1. In other words, the difference between the timing at which the first magnetic sensor 76A detects the magnetism of the magnet 74 and the timing at which the second magnetic sensor 76B detects the magnetism of the magnet 74 corresponds to the positions of the first magnetic sensor 76A and the second magnetic sensor 76B in the circumferential direction X3. The phase difference between the first magnetic sensor 76A and the second magnetic sensor 76B with respect to the central axis C1 is smaller than, for example, the phase difference between the first magnet 74A and the second magnet 74B with respect to the central axis C1. The phase difference between the first magnet 74A and the second magnet 74B with respect to the central axis C1 is, for example, 180 degrees.

Claims (12)

A power generating device for a human-powered vehicle,
A first member having a central axis;
A second member that is rotatable relative to the first member about the central axis;
A magnet attached to the second member;
an electric component that is disposed at a position different from the magnet in an axial direction relative to the central axis;
a magnetic shield member that overlaps at least a portion of the magnet when viewed from the axial direction, is positioned between the magnet and the electrical component in the axial direction, and extends in a radial direction relative to the central axis. The power generating device according to claim 1, wherein the electrical component includes a magnetic sensor configured to detect the magnetism of a magnetic component different from the magnet. The power generating device according to claim 1 or 2, wherein the electrical components include an electrical board. The power generating device according to claim 1 or 2, wherein the magnetic shielding member includes a soft magnetic material. The power generating device according to claim 1 or 2, wherein the magnetic shielding member is disposed all around the circumference in the circumferential direction relative to the central axis. The power generating device according to claim 1 or 2, wherein the magnetic shield member is arranged so as to be in contact with the magnet. a back yoke, at least a portion of which is disposed between the magnet and the second member in the radial direction;
The power generating device according to claim 1 , wherein the magnetic shield member is magnetically connected to the back yoke. The power generating device according to claim 7, wherein the magnetic shield member is arranged to contact the back yoke. The power generating device according to claim 7, wherein the magnetic shield member is formed integrally with the back yoke. The second member is provided to surround an outer surface of the first member in the radial direction,
The magnet is provided on an inner surface of the second member,
The power generating apparatus according to claim 1 , wherein the magnetic shield member extends inwardly from an inner surface of the second member in the radial direction. The power generating device according to claim 1 or 2, wherein a first radial distance from the central axis to the magnetic shield member in the radial direction is smaller than a second radial distance from the central axis to the magnet in the radial direction. 1. A hub assembly for a human-powered vehicle, comprising:
The power generating device according to claim 1 or 2,
The first member includes a shaft member,
The second member includes a hub shell.

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