TWI894403B - Hub assembly for human-powered vehicle - Google Patents

Abstract

An electrical assembly is provided to a human-powered vehicle. The electrical assembly includes an electric component and an electrical cable. The electrical cable has a first cable-end electrically connected to the electric component and a second cable-end spaced from the first cable-end by an intermediate section of the electrical cable. A cable intersection is formed in the intermediate section of the electrical cable to restrict movement of the electrical cable relative to the electric component.

Description

Wheel hub assembly for human-powered vehicles

This disclosure generally relates to an electrical assembly for a human-powered vehicle.

Recently, human-powered vehicles (e.g., bicycles) have incorporated various electrical components. For example, generators have been installed on human-powered vehicles (e.g., bicycles) to serve as power sources for electrical devices. Such generators generate electricity based on the rotation of the wheels of the human-powered vehicle. In some cases, these generators include a magnet and coil assembly. One of the magnet and coil assembly rotates based on the rotation of the wheel, while the other is stationary. The generator is sometimes mounted on the wheel hub of the human-powered vehicle.

Generally, the present disclosure relates to various features of wheel hub assemblies for human-powered vehicles. As used herein, the term "human-powered vehicle" refers to a vehicle capable of being propelled at least by human power, but does not include vehicles that utilize a power source other than human power. Specifically, vehicles that utilize an internal combustion engine as a propulsion source are not included in human-powered vehicles. Human-powered vehicles are generally conceived as compact, lightweight vehicles that sometimes do not require a license for use on public roads. The number of wheels on a human-powered vehicle is not limited. Human-powered vehicles include, for example, unicycles and vehicles with three or more wheels. Human-powered vehicles include, for example, various types of bicycles, such as mountain bikes, road bikes, city bikes, cargo bikes, recumbent bikes, and electric-assisted bicycles (e-bikes).

In view of the state of the art and in accordance with a first aspect of the present disclosure, an electrical assembly is provided for use in a human-powered vehicle. The electrical assembly includes an electrical component and a cable. The cable has a first cable end and a second cable end. The first cable end is electrically connected to the electrical component, and the second cable end is separated from the first cable end by a middle section of the cable. A cable junction is formed in the middle section of the cable to limit movement of the cable relative to the electrical component.

With the electrical assembly according to the first aspect, the movement of the cable relative to the electrical component is restricted, thereby reducing the possibility of the cable being disconnected from the electrical component.

According to a second aspect of the present disclosure, the electrical assembly according to the first aspect further includes a guide portion, and the middle section of the cable is wound around the guide portion at least once to hold the middle section of the cable against the guide portion.

With the electrical assembly according to the second aspect, the cable can be easily wound around the guide portion to form a cable junction that restricts movement of the cable relative to the electrical component.

According to a third aspect of the present disclosure, the electrical assembly according to the second aspect is constructed such that the middle section of the cable includes a winding portion wound around the guide portion, a first intersection portion, and a second intersection portion, wherein the first intersection portion extends beyond the second intersection portion at an intersection point of the middle section of the cable.

With the electrical assembly according to the third aspect, the movement of the cable relative to the electrical component is further restricted.

According to a fourth aspect of the present disclosure, the electrical assembly according to any one of the first to third aspects is constructed such that a portion of the middle section of the cable at least partially extends in a direction away from the electrical component.

With the electrical assembly according to the fourth aspect, movement of the cable relative to the electrical component can be easily restricted.

According to a fifth aspect of the present disclosure, the electrical assembly according to any one of the first to fourth aspects is constructed such that the electrical component includes a housing having a first surface and a second surface, the second surface being located on an opposite side of the electrical component relative to the first surface.

With the electrical assembly according to the fifth aspect, the components of the electrical assembly can be more reliably protected by using the housing.

According to a sixth aspect of the present disclosure, the electrical assembly according to the fifth aspect is constructed such that a first cable end of the cable enters the first surface of the housing. A middle section of the cable partially extends from the second surface in a direction away from the electrical component. The middle section of the cable extends beyond itself to form a cable junction on the first surface of the housing.

With the electrical assembly according to the sixth aspect, movement of the cable relative to the electrical component can be more easily restricted.

According to a seventh aspect of the present disclosure, the electrical assembly according to any one of the first to sixth aspects is constructed such that the electrical component includes a circuit board, and the first cable end of the cable is electrically connected to the circuit board.

With the electrical assembly according to the seventh aspect, various information from the electrical assembly can be remotely received from the circuit board via the cable.

According to an eighth aspect of the present disclosure, a wheel hub assembly is configured to include the electrical assembly described in any one of aspects 1 to 7. The wheel hub assembly includes a wheel hub shaft and a wheel hub body. The wheel hub shaft has a first axial end and a second axial end. The wheel hub body is rotatably mounted on the wheel hub shaft so as to rotate about the rotational center axis of the wheel hub assembly. The electrical component is non-rotatably mounted on the wheel hub shaft.

Using the electric assembly according to the eighth aspect, the electric assembly can be installed on the wheel hub of a human-powered vehicle.

According to a ninth aspect of the present disclosure, the wheel hub assembly according to the eighth aspect further includes a guide portion, and the guide portion is included in the wheel hub axle.

With the hub assembly according to the ninth aspect, the cable can be wound directly onto the hub axle to form a cable junction that limits movement of the cable relative to the electrical component.

According to a tenth aspect of the present disclosure, the wheel hub assembly according to the eighth aspect further includes a guide portion and a spacer. The spacer is disposed between the wheel hub shaft and the electrical component in a radial direction relative to the rotational center axis. The guide portion is included in the spacer.

With the hub assembly according to the tenth aspect, by using the spacer around which the cables are wound, frictional resistance at the cable intersection can be reliably established.

According to an eleventh aspect of the present disclosure, the wheel hub assembly according to the eighth aspect further includes a guide portion, and the guide portion is included in the electrical component.

With the wheel hub assembly according to the eleventh aspect, the cable can be wound around the guide portion before the electrical component is mounted on the wheel hub shaft.

According to a twelfth aspect of the present disclosure, the wheel hub assembly according to the eleventh aspect is constructed so that the electric component includes a housing, and the guide portion is included in the housing.

With the wheel hub assembly according to the twelfth aspect, the cable can be wound around the outer housing before the outer housing is mounted on the wheel hub axle.

According to a thirteenth aspect of the present disclosure, the wheel hub assembly according to any one of aspects 8 to 12 is constructed such that the electrical component includes a housing having a first surface facing a first axial end of the wheel hub shaft, a second surface facing a second axial end of the wheel hub shaft, and an opening extending from the first surface to the second surface, and the wheel hub shaft extends through the opening of the electrical component.

With the wheel hub assembly according to the thirteenth aspect, the electrical components can be easily installed on the wheel hub axle using the housing.

According to a fourteenth aspect of the present disclosure, the wheel hub assembly according to any one of the eighth to thirteenth aspects is constructed such that the wheel hub shaft includes a cable receiving channel extending axially between the electrical component and the second axial end of the wheel hub shaft, and the middle section of the cable is at least partially disposed in the cable receiving channel.

With the wheel hub assembly according to the fourteenth aspect, the size of the wheel hub assembly can be reduced in the radial direction, and the cables can be protected.

According to a fifteenth aspect of the present disclosure, the wheel hub assembly according to any one of the eighth to fourteenth aspects is constructed such that the electrical component includes a circuit board, and the circuit board is disposed perpendicular to the rotational center axis.

With the wheel hub assembly according to the fifteenth aspect, various information regarding the wheel hub assembly can be obtained by using a circuit board, while also increasing the degree of freedom in component placement and facilitating compact placement of the circuit board.

According to a sixteenth aspect of the present disclosure, the wheel hub assembly according to the fifteenth aspect further includes at least one capacitor electrically connected to the circuit board.

Using the wheel hub assembly according to the sixteenth aspect, it is possible to supply power to the circuit board when the human-powered vehicle is stopped.

According to a seventeenth aspect of the present disclosure, the wheel hub assembly according to any one of the eighth to sixteenth aspects further includes a generator disposed on the wheel hub body and configured to generate electricity by the rotation of the wheel hub body.

With the wheel hub assembly according to the seventeenth aspect, electricity can be generated while the wheel hub body is rotating.

According to an eighteenth aspect of the present disclosure, the wheel hub assembly according to any one of the eighth to seventeenth aspects further includes a sprocket support structure rotatably disposed about a rotational center axis, for transmitting a driving force to the wheel hub body while rotating about the rotational center axis in a driving rotational direction.

With the wheel hub assembly according to the eighteenth aspect, the sprocket support structure functions as a freewheel, allowing the sprocket support structure to stop rotating during coasting.

According to a nineteenth aspect of the present disclosure, the wheel hub assembly according to the eighth aspect further includes a detected component and a rotation detection sensor. The detected component is disposed on the sprocket support structure, and the rotation detection sensor is configured to detect the detected component to detect rotation of the sprocket support structure about the rotation center axis.

With the wheel hub assembly according to the nineteenth aspect, the rotation of the sprocket support structure can be reliably detected.

Furthermore, other purposes, features, aspects, and advantages of the disclosed wheel hub assembly will become apparent to those skilled in the art from the following detailed description, which, in conjunction with the accompanying drawings, discloses a preferred embodiment of the operating device.

10: Wheel assembly

12: Wheel hub

12a: First axial end

12b: Second axial end

12c: Axial hole

12d: Groove

12e: Groove

14: Wheel Body

14a: First outer convex edge

14b: Second outer convex edge

16: First end cap

18: Second end cap

18a: Rotation limiting component

18b: Opening

20: Fixing bolts

212: Wheel hub

22: Wheel retaining mechanism

22a: Through-axis

22b: Cam body

22c: Cam rod

22d: Adjusting nut

24: First wheel hub bearing

24a: First Inner Ring

24b: First outer ring

24c: First roller element

26: Second wheel hub bearing

26a: Second inner ring

26b: Second outer ring

26c: Second roller element

28: Bearing spacer

28a: Inner peripheral end

28a1: Non-circular opening

28b: Outer peripheral end

28c: Axial opening

30: Sprocket support structure

30a: First end

30b: Second end

32: First sprocket support bearing

32a: First inner ring

32b: First outer ring

32c: First roller element

34: Second sprocket support bearing

34a: Second inner ring

34b: Second outer ring

34c: Second roller element

35: Tubular spacer element

36: Electrical assembly

38: Electrical components

38a: Opening

40: Cable

40a: First cable end

40b: Second cable end

40c: Middle section

40c1: Coiled section

40c2: First intersection

40c3: Second intersection

42: Shell

42a: First surface

42b: Second surface

42c: Interior space

42d: Keying protrusion

43: Spacer

43a: Guidance Section

43b: Ring-shaped abutment portion

44: Circuit board

44a: First peripheral end portion

44b: Second peripheral end portion

44c: Inward curved edge

44d: Outward curved edge

44e: First axial facing surface

44f: Second axial facing surface

45: Shell

46: Cover

47: Threaded Fasteners

48: Electronic controller

50: Detected component

52: Rotation detection sensor

54: Capacitor

56A: First conductor

56B: Second conductor

58: One-way clutch

58A: Pawl

58B: Bias element

58C: Ratchet tooth

58D: Retaining ring

58E: Sealing component

60: Generator

62: Stator

62A: Winding Coil

62B: Winding rack

62C: First yoke

62D: Second yoke

64: Rotor

64A: First magnetic component

64B: Second magnetic component

64C: Tubular support

68A: First axial stator end

68B: Second axial stator end

70: Cable Junction

76: Fixed plate

76a: Bump

76b: Bump

78: Fixed plate

78a: Bump

78b: Bump

78c: Opening

80: Nut

138: Electrical components

138a: Opening

142: Shell

145: Shell

145a: Introductory section

146: Cover

212: Hub shaft

243: Guidance Section

A1: Rotational axis

ASP: Height-adjustable seat post

BP: Main battery pack

C: Crank

CA1: Crankshaft

CA2: Crank Arm

EN:Chain

CS: Rear sprocket

D1: Drive rotation direction

D2: Non-driven rotation direction

DT: Transmission System

DU: Electric Drive Unit

EC1: First electrical connector

EC2: Second electrical connector

FB: Front frame

FF: Front Fork

FS: Front sprocket

FW: Front wheel

H: Handlebars

PD: Pedal

PT: Meeting Point

RB: Rear frame

RD: Rear Derailleur

RS:Rear shock absorber

RW: Rear wheel

S: Saddle

SC: Cycling computer

SL: Transmission

V: Rickshaws, bicycles

VB: Body

W1: Wire

W2:Wire

W3: Wires

W4: Wires

Referring now to the accompanying drawings forming a part of this original disclosure: [FIG. 1] is a side view of a human-powered vehicle (i.e., a bicycle) equipped with a wheel hub assembly (i.e., a bicycle wheel hub assembly) according to a first embodiment; [FIG. 2] is a longitudinal side view of the wheel hub assembly shown in FIG. 1 attached to the body of the human-powered vehicle; [FIG. 3] is a perspective view of the wheel hub assembly shown in FIG. 1; [FIG. 4] is a perspective view of the wheel hub assembly shown in FIG. 2 and FIG. 3, with selected components removed to reveal the bearing spacer; [FIG. 5] is a longitudinal cross-sectional view of the wheel hub assembly shown in FIG. 2 through FIG. 4, taken along section line 5-5 in FIG. 3. ; [Figure 6] is an enlarged sectional view of a first portion of the wheel hub assembly shown in Figure 5; [Figure 7] is an enlarged sectional view of a second portion of the wheel hub assembly shown in Figure 5; [Figure 8] is a perspective view of the wheel hub assembly shown in Figures 2 to 5, in which a portion of the wheel hub is cut away; [Figure 9] is a first perspective view of an electrical assembly for the wheel hub assembly shown in Figures 2 to 5; [Figure 10] is a second perspective view of the electrical assembly shown in Figure 9; [Figure 11] is a partially exploded perspective view of the electrical assembly shown in Figures 9 and 10; [Figure 12] is a perspective view of selected components of the electrical assembly shown in Figures 9 and 10, in which the generator has been [Figure 13] is a first end view of selected components of the electrical assembly shown in Figure 12, with the generator removed; [Figure 14] is a first end view of selected components of the electrical assembly shown in Figures 12 and 13; [Figure 15] is a partially exploded perspective view of the electrical components and bearing spacer of the wheel hub assembly shown in Figures 2 to 5; [Figure 16] is an end view of the wheel hub assembly shown in Figures 2 to 5, with selected components; [Figure 17] is a perspective view of the electrical components shown in Figures 13 to 16, with the cables wrapped around the spacer and electrically connected to the electrical components; [Figure 18] is a perspective view of the electrical components shown in Figures 13 to 17 A cross-sectional view of the electrical assembly taken along section line 18-18 in FIG. 17; FIG. 19 is a perspective view of the electrical assembly having a modified housing; FIG. 20 is a cross-sectional view of the electrical assembly shown in FIG. 19 taken along section line 20-20 in FIG. 19; FIG. 21 is a cross-sectional view of the electrical assembly shown in FIG. 19 and FIG. 20, similar to FIG. 20, in which the cable is wound around a guide portion integrally formed on a housing body for the electrical assembly; and FIG. 22 is a cross-sectional view of the electrical assembly shown in FIG. 13 to FIG. 17, similar to FIG. 18, in which the cable is directly wound around a guide portion formed on a hub shaft.

Selected embodiments will now be explained with reference to the drawings. Those skilled in the art of human-powered vehicles (e.g., bicycles) will appreciate from this disclosure that the following description of the embodiments is provided for illustration purposes only and is not intended to limit the invention as defined by the appended patent claims and their equivalents.

Referring first to FIG. 1 , an operating device 10 is provided on a human-powered vehicle V. In other words, the human-powered vehicle V (i.e., a bicycle) is shown as being equipped with a wheel hub assembly 10 according to the illustrated embodiment. In the illustrated embodiment, the wheel hub assembly 10 is a bicycle wheel hub. More specifically, the wheel hub assembly 10 is a bicycle rear wheel hub. Furthermore, in the illustrated embodiment, the wheel hub assembly 10 is a wheel hub DC generator (dynamo) for providing electrical power to one or more components of the bicycle V. However, the wheel hub assembly 10 is not limited to a wheel hub DC generator. In particular, certain aspects of the wheel hub assembly 10 can be provided so as not to generate electrical power. Furthermore, although the wheel hub assembly 10 is illustrated as a rear wheel hub, certain aspects of the wheel hub assembly 10 can be configured for a front wheel hub. Therefore, the wheel hub assembly 10 is not limited to a rear wheel hub.

Here, bicycle V is an electric-assisted bicycle (e-bike). Alternatively, bicycle V can be a road bicycle, a city bicycle, a cargo bicycle, a recumbent bicycle, or another type of off-road bicycle such as a cyclocross bicycle. As shown in FIG1 , bicycle V includes a body VB supported by a rear wheel RW and a front wheel FW. Body VB essentially comprises a front frame FB and a rear frame RB (swinging arm). Body VB is also provided with handlebars H and a front fork FF for steering the front wheel FW. The rear frame RB is pivotally mounted to a rear section of the front frame FB, allowing it to pivot relative to the front frame FB. The rear wheel RW is mounted to the rear end of the rear frame RB. A rear shock absorber RS is operatively disposed between the front frame FB and the rear frame RB. The rear shock absorber RS is installed between the front frame FB and the rear frame RB to control the movement of the rear frame RB relative to the front frame FB. Specifically, the rear shock absorber RS absorbs vibrations transmitted from the rear wheel RW. The rear wheel RW is rotatably mounted to the rear frame RB. The front wheel FW is mounted to the front frame FB via the front fork FF. Specifically, the front wheel FW is mounted to the lower end of the front fork FF. The height-adjustable seatpost ASP is conventionally mounted to the seat tube of the front frame FB and supports the bicycle seat or saddle S in any suitable manner. The front fork FF is pivotally mounted to the head tube of the front frame FB. The handlebar H is mounted to the upper end of the control column or control tube of the front fork FF. The front fork FF absorbs vibrations transmitted from the front wheel FW. Preferably, the rear shock absorber RS and the front fork FF are electrically adjustable suspension devices. For example, the stiffness and/or travel length of the rear shock absorber RS and the front fork FF can be adjusted.

The bicycle V further includes a transmission system DT and an electric drive unit DU operatively coupled to the transmission system DT. For example, the transmission system DT is a chain-driven type, including a crank C, a front sprocket FS, a plurality of rear sprockets CS, and a chain CN. The crank C includes a crank axle CA1 and a pair of crank arms CA2. The crank axle CA1 is rotatably supported by the front frame FB via the electric drive unit DU. The crank arms CA2 are provided at opposite ends of the crank axle CA1. The pedals PD are rotatably coupled to the distal ends of each crank arm CA2. The transmission system DT can be selected from any type and can be either belt-driven or shaft-driven.

The electric drive unit DU includes an electric motor that provides drive-assistance to the front sprocket FS. The electric drive unit DU can be activated in a conventional manner to assist in the propulsion of the bicycle V. For example, the electric drive unit DU is activated by human drive force applied to the pedals PD. The electric drive unit DU is activated by power supplied from a main battery pack BP mounted on the down tube of the bicycle V. The main battery pack BP can provide power to other vehicle components, such as the rear derailleur RD, the height-adjustable seatpost ASP, the rear shock absorber RS, the front fork FF, and any other electrically powered vehicle components.

The bicycle V also includes a cycle computer (SC). Here, the cycle computer SC is mounted on the front frame FB. Alternatively, the cycle computer SC can be mounted on the handlebars H. The cycle computer SC informs the rider of various travel and/or operating conditions of the bicycle V. The cycle computer SC can also include various control programs for automatically controlling one or more bicycle components. For example, the cycle computer SC can be equipped with an automatic shifting program to change the gear position of the rear derailleur RD based on one or more travel and/or operating conditions of the bicycle V.

The bicycle V also includes a rear derailleur RD, which is attached to the rear frame RB and is used to shift the chain CN between the rear sprockets CS. The rear derailleur RD is a type of shifting device. Here, the rear derailleur RD is an electric derailleur (i.e., an electric shifting device or electric transmission). The rear derailleur RD is located on the rear side of the rear frame RB near the wheel hub assembly 10. The rear derailleur RD can be operated when the rider of the bicycle V manually operates the shifting device or speed changer SL. The rear derailleur RD can also be automatically operated based on the travel conditions and/or operating conditions of the bicycle V. The bicycle V can also include a plurality of electrical components. Some or all of these electrical components can be supplied with electricity generated by the wheel hub assembly 10 during the generating state, as discussed below.

The structure of the wheel hub assembly 10 will now be discussed with particular reference to Figures 2 through 8 . The wheel hub assembly includes a wheel hub shaft 12 and a wheel hub body 14. The wheel hub shaft 12 is configured to be non-rotatably attached to the vehicle body VB. In this embodiment, the wheel hub shaft 12 is configured to be non-rotatably attached to the rear frame RB. The wheel hub body 14 is rotatably mounted on the wheel hub shaft 12 so as to rotate about the rotational axis A1 of the wheel hub assembly 10. The wheel hub shaft 12 has a center axis coaxial with the rotational axis A1. The wheel hub body 14 is configured to rotate about the rotational axis A1. In other words, the hub body 14 is mounted so as to be rotatable around the hub shaft 12.

As shown in Figures 5 to 7 , the hub shaft 12 is a rigid member made of a suitable material, such as metal. The hub shaft 12 has a first axial end 12a and a second axial end 12b. Here, the hub shaft 12 is a tubular member. Therefore, the hub shaft 12 has an axial bore 12c extending between the first axial end 12a and the second axial end 12b. The hub shaft 12 can be a single, unitary member or fabricated from multiple components. Here, the hub shaft 12 is provided with a first end piece or end cap 16 and a second end piece or end cap 18. The first end cap 16 is mounted on the first axial end 12a of the wheel hub shaft 12 (the left side in Figures 2 to 8 ), and the second end cap 18 is mounted on the second axial end 12b of the wheel hub shaft 12 (the right side in Figures 2 to 8 ). For example, the first end cap 16 is screwed onto the first axial end 12a of the wheel hub shaft 12, and the second end cap 18 is secured to the second axial end 12b of the wheel hub shaft 12 by a fixing bolt 20 screwed into the axial hole 12c of the wheel hub shaft 12. In this way, the first end cap 16 and the fixing bolt 20 are received in the mounting opening of the rear frame RB, as shown in Figure 2 . Here, the second end cap 18 includes a rotation-restricting member 18a, which is also received in one of the mounting openings of the rear frame RB. The rotation-restricting member 18a engages the rear frame RB, so that the rotation of the wheel hub axle 12 relative to the rear frame RB is restricted.

As shown in Figures 2 and 5 , the wheel hub assembly 10 also includes a wheel retaining mechanism 22 for securing the hub axle 12 of the wheel hub assembly 10 to the rear frame RB. The wheel retaining mechanism 22 basically comprises a shaft or through-axle (skewer) 22a, a cam body 22b, a cam rod 22c, and an adjusting nut 22d. The cam rod 22c is attached to one end of the through-axle 22a via the cam body 22b, while the adjusting nut 22d is screwed onto the other end of the through-axle 22a. The rod 22c is attached to the cam body 22b. The cam body 22b is coupled between the through-shaft 22a and the cam rod 22c to move the through-shaft 22a relative to the cam body 22b. Thus, the rod 22c is operated to move the through-shaft 22a axially relative to the cam body 22b, about the rotational axis A1, thereby changing the distance between the cam body 22b and the adjusting nut 22d. Preferably, a compression spring is provided at each end of the through-shaft 22a. Alternatively, the wheel hub axle 12 can be non-rotatably attached to the rear frame RB using another attachment structure as needed and/or desired.

As shown in Figures 1, 3, and 4, the wheel hub body 14 is rotatably mounted on the wheel hub axle 12 for rotation in a drive rotational direction D1. Drive rotational direction D1 corresponds to the forward drive direction of the rear wheel RW. The wheel hub body 14 is configured to support the rear wheel RW in a conventional manner. More specifically, in the illustrated embodiment, the wheel hub body 14 includes a first outer flange 14a and a second outer flange 14b. The first outer flange 14a and the second outer flange 14b extend radially outward from the peripheral surface of the wheel hub body 14 relative to the rotational center axis A1. The first outer flange 14a and the second outer flange 14b are configured to receive a plurality of spokes ( FIG. 1 ) for attaching the rim of the rear wheel RW ( FIG. 1 ) to the wheel hub 14 . In this manner, the wheel hub 14 and the rear wheel RW are coupled to rotate together.

As shown in Figures 5 and 6, the wheel hub assembly 10 further includes a first wheel hub bearing 24. The first wheel hub bearing 24 rotatably supports the wheel hub body 14. Preferably, the wheel hub assembly 10 further includes a second wheel hub bearing 26 rotatably supports one end of the wheel hub body 14. The first wheel hub bearing 24 rotatably supports the other end of the wheel hub body 14 relative to the rotational axis A1. The first wheel hub bearing 24 includes a first inner race 24a, a first outer race 24b, and a plurality of first roller elements 24c. The first roller elements 24c are disposed between the first inner race 24a and the first outer race 24b. The second hub bearing 26 includes a second inner ring 26a, a second outer ring 26b, and a plurality of second roller elements 26c. The second roller elements 26c are disposed between the second inner ring 26a and the second outer ring 26b. The first hub bearing 24 and the second hub bearing 26 are radial ball bearings. Radial ball bearings support forces perpendicular to the axis. Furthermore, radial roller bearings can be used in place of radial ball bearings. Radial roller bearings include cylindrical roller bearings and needle roller bearings.

Here, the wheel hub assembly 10 further includes a bearing spacer 28. The bearing spacer 28 is disposed on the wheel hub shaft 12 and supports the wheel hub body 14 via the second wheel hub body bearing 26. The bearing spacer 28 supports the second wheel hub body bearing 26. The bearing spacer 28 has an inner peripheral end 28a and an outer peripheral end 28b. The inner peripheral end 28a is disposed on the wheel hub shaft 12, and the outer peripheral end 28b is radially spaced outward from the inner peripheral end 28a relative to the rotation center axis A1. The second wheel hub body bearing 26 is disposed at the outer peripheral end 28b of the bearing spacer 28 and rotatably supports the wheel hub body 14. The bearing spacer 28 is non-rotatable relative to the wheel hub shaft 12. Specifically, as shown in FIG4 , the inner peripheral end 28a defines a non-circular opening 28a1 that mates with the non-circular portion of the wheel hub shaft 12, thereby coupling the bearing spacer 28 in a manner that prevents rotation relative to the wheel hub shaft 12. The axial position of the bearing spacer 28 relative to the wheel hub shaft 12 can be determined by being clamped between a step provided on the wheel hub shaft 12 and a nut screwed onto the wheel hub shaft 12. Here, the bearing spacer 28 includes an axial opening 28c.

Here, the wheel hub assembly 10 also includes a sprocket support structure 30. In the illustrated embodiment, the sprocket support structure 30 supports the rear sprocket CS, as shown in FIG2 . The sprocket support structure 30 is rotatable about a rotational axis A1, transmitting a driving force to the wheel hub body 14 while rotating about the rotational axis A1 in a driving rotational direction. As explained below, the sprocket support structure 30 does not transmit a driving force to the wheel hub body 14 while rotating about the rotational axis A1 in a non-driving rotational direction D2. The non-driving rotational direction D2 is opposite to the driving rotational direction D1 with respect to the rotational axis A1. The rotational axis of the sprocket support structure 30 is arranged concentrically with the rotational axis A1 of the wheel hub assembly 10.

Although the sprocket support structure 30 is configured to non-rotatably support the rear sprocket CS, the sprocket support structure 30 is not limited to the illustrated embodiment. Alternatively, one or more of the rear sprockets CS may be integrally formed with the sprocket support structure 30. In any case, the sprocket support structure 30 and the rear sprocket CS are coupled together to rotate together in both the driving rotational direction D1 and the non-driving rotational direction D2.

The hub assembly 10 further includes a first sprocket support bearing 32 and a second sprocket support bearing 34. The first sprocket support bearing 32 rotatably supports the first end 30a of the sprocket support structure 30. The second sprocket support bearing 34 rotatably supports the second end 30b of the sprocket support structure 30. The first sprocket support bearing 32 and the second sprocket support bearing 34 have an outer diameter smaller than the outer peripheral end 28b of the bearing spacer 28. The inner diameter of the first sprocket support bearing 32 is larger than the inner diameter of the second sprocket support bearing 34. Thus, the first and second sprocket support bearings 32 and 34 can be mounted on the hub shaft 12 from the second axial end 12b of the hub shaft 12. The first sprocket support bearing 32 includes a first inner ring 32a, a first outer ring 32b, and a plurality of first roller elements 32c. The first roller elements 32c are disposed between the first inner ring 32a and the first outer ring 32b. The second sprocket support bearing 34 includes a second inner ring 34a, a second outer ring 34b, and a plurality of second roller elements 34c. The second roller elements 34c are disposed between the second inner ring 34a and the second outer ring 34b. Here, the first sprocket support bearing 32 and the second sprocket support bearing 34 are radial roller bearings. Radial ball bearings support forces in a direction perpendicular to the axis. Alternatively, radial roller bearings can be used in place of radial ball bearings. Radial roller bearings include cylindrical roller bearings and needle roller bearings. A tubular spacer element 35 is interposed between the first sprocket support bearing 32 and the second sprocket support bearing 34.

As shown in Figures 5 to 7, the wheel hub assembly 10 also includes an electrical assembly 36. Therefore, the electrical assembly 36 is mounted on the rickshaw V. The electrical assembly 36 includes electrical components 38 and electrical cables 40. Although the electrical assembly 38 is part of the wheel hub assembly 10, it can be used with other components of the rickshaw. The electrical assembly 38 has an opening 38a for receiving the wheel hub axle 12 through the opening 38a. Therefore, the electrical assembly 38 is supported on the wheel hub axle 12. As explained later, the electrical assembly 38 is non-rotatably mounted on the wheel hub axle 12.

Here, the electrical assembly 38 includes a housing 42. The housing 42 is configured to define an opening 38a in the electrical assembly 38 that receives the hub axle 12. The housing 42 has a first surface 42a, a second surface 42b, and the opening 38a. The opening 38a extends from the first surface 42a to the second surface 42b. The second surface 42b is located on the opposite side of the electrical assembly 38 from the first surface 42a. In the illustrated embodiment, the first surface 42a faces the first axial end 12a of the hub axle 12, while the second surface 42b faces the second axial end 12b of the hub axle 12. Here, the hub axle 12 extends through the opening 38a of the electrical assembly 38.

Here, the electrical assembly 38 further includes a spacer 43 disposed radially between the wheel hub shaft 12 and the electrical assembly 38 relative to the rotational axis A1. In other words, the wheel hub assembly 10 further includes a spacer 43 disposed radially between the wheel hub shaft 12 and the electrical assembly 38 relative to the rotational axis A1. The spacer 43 is a tubular support member having a cylindrical guide portion 43a and an annular abutment portion 43b. The guide portion 43a is contained within the spacer 43. Therefore, the electrical assembly 36 also includes the guide portion 43a. Since the wheel hub assembly 10 includes the electrical assembly 36, the wheel hub assembly 10 also includes the guide portion 43a.

Furthermore, the electrical assembly 38 includes a circuit board 44. Therefore, the electrical assembly 38 also includes the circuit board 44. The electrical assembly 38 is disposed in the hub body 14. Therefore, the circuit board 44 is disposed in the housing 42. Here, the first cable end 40a of the cable 40 is electrically connected to the circuit board 44.

In the illustrated embodiment, the housing 42 includes a housing 45 and a cover 46. The cover 46 is attached to the housing 45 to enclose the circuit board 44 in the housing 42. Here, the cover 46 is bonded to the housing 45 by adhesive or welding. However, the cover 46 can be attached to the housing 45 by screw fasteners, rivets, etc. Preferably, the housing 45 and the cover 46 are rigid components made of a suitable material. For example, the housing 45 and the cover 46 are made of a resin material. For example, the housing 45 and the cover 46 can each be an injection molded component. In the illustrated embodiment, the bearing spacer 28 is fixedly attached to the housing 42 by a plurality of threaded fasteners 47. The threaded fasteners 47 can be screwed into the cover 46 of the housing 42.

The housing 42 is non-rotatable relative to the wheel hub axle 12. In the illustrated embodiment, a circuit board 44 is disposed within the housing 42, which is non-rotatable relative to the wheel hub axle 12. The housing 42 is configured to house the circuit board 44 and other components. Specifically, the housing 42 has an outer peripheral surface defining an interior space 42c, in which the circuit board 44 is disposed. A first surface 42a of the housing 42 includes a plurality of keying projections 42d. As described later, the keying projections 42d can be configured to engage a non-rotatable member disposed on the wheel hub axle 12 to non-rotatably couple the housing 42 to the wheel hub axle 12.

As shown in Figures 7 and 8, a cover 46 is coupled to the housing 45 to protect the circuit board 44 and other components housed in the housing 42. The cover 46 covers the interior space 42c of the housing 45. Therefore, at least the housing 42, the circuit board 44, and the capacitor 54 can be considered to constitute an electrical unit disposed within the hub body 14. The interior space 42c has a donut shape, with the hub axle 12 passing through the central region of the housing 42. This prevents the circuit board 44 from rotating relative to the hub axle 12. The circuit board 44 is positioned perpendicular to the rotational axis A1. The circuit board 44 is part of the electrical assembly 38.

As shown in Figure 9, in the illustrated embodiment, the circuit board 44 has a curved shape. Here, the circuit board 44 has a first peripheral end portion 44a and a second peripheral end portion 44b. The circuit board 44 also has at least one curved edge that extends at least partially from the first peripheral end portion 44a to the second peripheral end portion 44b. Here, this at least one curved edge includes at least one of an inner curved edge 44c and an outer curved edge 44d relative to the rotational axis A1. The circuit board 44 also includes an electronic controller 48 disposed on the circuit board 44. The electronic controller 48 is configured to receive detection signals from the rotation detection sensor 52. The electronic controller 48 includes at least one processor that executes a predetermined control program. At least one processor can be, for example, a central processing unit (CPU) or a microprocessing unit (MPU). The term "electronic controller" used herein refers to hardware that executes software programs and does not include humans. Preferably, the circuit board 44 also includes an information storage device (memory) disposed on the circuit board 44. The data storage device (memory) stores various control programs and information, which is used for various control processes including power generation control, power storage control, wheel rotation detection control, etc. The data processing device includes any computer storage device other than a transient transmission signal or any non-transient computer-readable medium. For example, the data processing device includes a non-volatile memory and a volatile memory. Non-volatile memory includes, for example, at least one of read-only memory (ROM), erasable programmable read-only memory (EPROM), electrically erasable programmable read-only memory (EEPROM), and flash memory. Volatile memory includes, for example, random access memory (RAM).

As shown in FIG8 , the wheel hub assembly 10 further includes a detected component 50 coupled to the sprocket support structure 30. Specifically, the detected component 50 is fixed to the sprocket support structure 30 so that the detected component 50 and the sprocket support structure 30 rotate together about the wheel hub axle 12. The wheel hub assembly 10 also includes a rotation detection sensor 52 configured to detect the detected component 50 and thereby detect rotation of the sprocket support structure 30 about the rotation center axis A1. The rotation detection sensor 52 is disposed within the wheel hub body 14. In other words, the rotation detection sensor 52 is configured to detect the detected component 50 disposed in the sprocket support structure 30. Specifically, the rotation detection sensor 52 is disposed within the interior space 42c of the outer housing 42. In this manner, the rotation detection sensor 52 is non-rotatably mounted to the wheel hub body 14. Therefore, the rotation detection sensor 52 does not rotate with the wheel hub body 14. The rotation detection sensor 52 is also part of the electrical assembly 38. The rotation detection sensor 52 is electrically connected to the circuit board 44. As shown in FIG. 7 , the rotation detection sensor 52 is disposed within the wheel hub body 14 at a position radially spaced outward from the wheel hub axle 12.

As shown in Figures 4, 8, and 16, the rotation detection sensor 52 is positioned axially aligned within the axial opening 28c of the bearing spacer 28. This prevents the bearing spacer 28 from interfering with the rotation detection sensor 52, which detects the detected component 50 disposed on the sprocket support structure 30. As shown in Figures 8 and 16, the rotation detection sensor 52 is positioned separately from the circuit board 44. Specifically, the rotation detection sensor 52 is positioned separately from the circuit board 44 in a direction parallel to the rotation center axis A1. The rotation detection sensor 52 is electrically connected to the circuit board 44.

In the illustrated embodiment, the rotation detection sensor 52 comprises a magnetic sensor, and the detected component 50 comprises a magnet. Thus, the magnetic sensor detects the movement of the magnet, which rotates along with the sprocket support structure 30. In other words, with this configuration, the rotation detection sensor 52 is configured to detect the detected component 50, thereby detecting rotation of the sprocket support structure 30 about the rotation center axis A1. The electronic controller 48 is configured to receive the detection signal from the rotation detection sensor 52.

Here, the magnet of the detected component 50 is an annular member having alternating south-pole and north-pole segments. In this manner, the rotation detection sensor 52 can detect the amount and direction of rotation of the sprocket support structure 30. However, the detected component 50 is not limited to the annular member shown. For example, the detected component 50 can be formed from a single non-annular magnet or from two or more magnets circumferentially spaced about the rotation axis A1. In the case of using two or more circumferentially spaced magnets, a back yoke can be provided, and the circumferentially spaced magnets can be placed on the back yoke. In this manner, the peripherally spaced magnets can be easily installed in the wheel hub assembly 10. As used herein, the term "sensor" refers to a hardware device or apparatus configured to detect a particular event, object, presence or absence of a substance, or a change in its environment, and to emit a signal in response. As used herein, the term "sensor" does not include a human being.

The wheel hub assembly 10 further includes at least one capacitor 54 electrically connected to the circuit board 44. The at least one capacitor is electrically connected to the at least one conductor. Here, the electrical assembly 38 includes two capacitors 54. The capacitors 54 are examples of power storage within the electrical assembly 38. In other words, the capacitors 54 are also part of the electrical assembly 38. The capacitors 54 are preferably disposed within the housing 42 of the wheel hub assembly 10. Thus, the capacitors 54 are non-rotatably supported on the wheel hub axle 12 by the housing 42.

As explained below, additional conductors electrically connect the rotation detection sensor 52 and the circuit board 44. Here, the electrical assembly 38 includes a first conductor 56A and a pair of second conductors 56B. The rotation detection sensor 52 is electrically connected to the circuit board 44 via the first conductor 56A. Here, the first conductor 56A is a flexible ribbon conductor. The first conductor 56A can be a conductive lead. Meanwhile, the circuit board 44 is electrically connected to the capacitor 54 via the second conductor 56B. The second conductor 56B extends from one of the first peripheral end portion 44a and the second peripheral end portion 44b. Here, one of the second conductors 56B extends from the first peripheral end portion 44a to electrically connect one of the capacitors 54 to the circuit board 44. The other of the second conductors 56B extends from the second peripheral end portion 44b to electrically connect the other of the capacitors 54 to the circuit board 44. Here, the second conductor 56B is a flexible ribbon conductor. The second conductor 56B can be a conductive lead. The capacitors 54 are positioned within the interior of the housing 42 at a location other than on the circuit board 44. The capacitors 54 can be secured within the housing 42 using an adhesive or the like. The cover 46 is coupled to the housing 45 to protect the capacitors 54 within the housing 42.

The circuit board 44 is electrically connected to the rotation detection sensor 52 and the capacitor 54. In this manner, the capacitor 54 provides power to the circuit board 44 and other electrical components electrically connected to the circuit board 44. For example, the capacitor 54 provides power to the rotation detection sensor 52. Furthermore, the electronic controller 48 of the circuit board 44 is configured to control the input and output of power from the capacitor 54.

As shown in Figures 5 to 8, the wheel hub assembly 10 further includes a one-way clutch 58 formed between the wheel hub body 14 and the sprocket support structure 30. The one-way clutch 58 includes a plurality of pawls 58A disposed between the wheel hub body 14 and the sprocket support structure 30. The one-way clutch 58 also includes a biasing element 58B that couples the pawls 58A to the sprocket support structure 30. The one-way clutch 58 also includes a plurality of ratchet teeth 58C. The ratchet teeth 58C are disposed on a fixed ring 58D fixed to the wheel hub body 14. The ratchet teeth 58C are disposed on the inner peripheral surface of the fixed ring 58D. The fixed ring 58D is screwed onto the wheel hub 14. The fixed ring 58D is made of a hard material, such as metal. The fixed ring 58D abuts the outer ring 26b of the second wheel hub bearing 26 in the axial direction relative to the rotational center axis A1. The outer ring 26b of the second wheel hub bearing 26 abuts against a step formed in the wheel hub 14 on opposite sides in the axial direction. The outer ring 26b of the second wheel hub bearing 26 is restricted in axial movement by the fixed ring 58D and the step formed in the wheel hub 14. A biasing element 58B biases the pawl 58A into engagement with the ratchet tooth 58C of the fixed ring 58D. Biasing element 58B pushes pawl 58A against top sprocket support structure 30, causing pawl 58A to pivot toward engagement with ratchet tooth 58C of fixed ring 58D. Sealing member 58E is provided on fixed ring 58D. Sealing member 58E is formed into a ring shape. The tongue portion of sealing member 58E contacts the outer peripheral surface of sprocket support structure 30.

In this manner, the sprocket support structure 30 is coupled to the sprocket body 14 so as to rotate together about the rotational axis A1 in the driving direction D1. Furthermore, when the sprocket support structure 30 rotates in the non-driving direction D2, the ratchet gear 58C of the sprocket support structure 30 pushes the pawl 58A, pivoting the pawl 58A to a retracted position against the sprocket support structure 30. Thus, the pawl support structure 30 is configured to rotate about the rotational axis A1 in the non-driving direction D2 relative to the wheel hub body 14. In this manner, the sprocket support structure 30 and the one-way clutch 58 form a freewheel commonly used in bicycles. Because the basic operation of a flywheel is quite conventional, the flywheel will not be discussed or illustrated in any greater detail.

As shown in Figures 5 to 8 and 10 to 12 , the wheel hub assembly 10 includes a generator 60 . Therefore, the generator 60 is provided in the human-powered vehicle V. Here, the generator 60 is considered part of the electrical assembly 36 . In other words, the electrical assembly 36 includes the generator 60 .

The generator 60 is mounted on the wheel hub 14 and is configured to generate electricity by the rotation of the wheel hub 14. More specifically, the generator 60 is mounted on the wheel hub 14 between the wheel hub shaft 12 and the center portion of the wheel hub 14. In the illustrated embodiment, the wheel hub 14 is rotatably mounted on the shaft 12 so as to rotate about the generator 60's rotational axis A1. The generator 60 is configured to generate electricity by the rotation of the wheel hub 14 relative to the wheel hub shaft 12. The electronic controller 48 of the circuit board 44 is electrically connected to the generator 60 to control the generator 60's power output. Therefore, the electricity generated by the generator 60 can be stored and/or directly supplied to other components such as the rotation detection sensor 52, the rear derailleur RD, etc.

Although the generator 60 is shown and described as being part of the wheel hub assembly 10 , the generator 60 can be applied to various components of the human-powered vehicle V. Generally, the generator 60 includes a shaft, a stator, and a rotor. Therefore, the following description of the generator 60 is not limited to use as part of the wheel hub assembly. Rather, the following description of the generator 60 can be employed in other components of the human-powered vehicle V to generate electricity.

In the illustrated embodiment, the generator 60 further includes a stator 62 and a rotor 64. The stator 62 is non-rotatable relative to the hub shaft 12. On the other hand, the rotor 64 is rotatably mounted on the hub shaft 12 so as to rotate about the rotational center axis A1 of the generator 60. Specifically, the rotor 64 is disposed on the hub body 14 so as to rotate therewith. Therefore, when the hub body 14 rotates relative to the hub shaft 12, the rotor 64 rotates relative to the stator 62 to generate electricity. That is, an induced electromotive force is generated in the stator 62 by the rotation of the rotor 64, and current flows out of the stator 62 of the generator 60. As shown in Figures 6 and 9 to 12, current from the stator 62 is supplied to the electrical components 38 via a pair of wires W1 and W2. Wires W1 and W2 are electrically connected to the circuit board 44. Here, wires W1 and W2 extend through openings in the end wall portion of the housing 42 and then through the generator 60. As shown in Figure 9, wires W1 and W2 are electrically connected to the circuit board 44. As shown in Figures 11 and 12, the stator 62 has a pair of wires W3 and W4. Wire W3 is electrically connected to wire W1, and wire W4 is electrically connected to wire W2.

As shown in Figures 6, 7, 10, and 11, the stator 62 has a first axial stator end 68A and a second axial stator end 68B. The first axial stator end 68A faces the first axial end 12a of the shaft 12, which is relative to the rotational axis A1, and the second axial stator end 68B faces the second axial end 12b of the shaft 12, which is relative to the rotational axis A1. Here, the stator 62 includes an armature mounted on the shaft 12. The armature of the stator 62 includes a winding coil 62A and a bobbin 62B.

Winding coil 62A is wound on a bobbin 62B, which supports winding coil 62A. Winding coil 62A is made of conductive metal wire, such as copper or aluminum alloy. Wires W3 and W4 are electrically connected to both ends of winding coil 62A. Wire W3 is electrically connected to wire W1 via a first electrical connector EC1. Wire W4 is electrically connected to wire W2 via a second electrical connector EC2. In this way, the power generated in winding coil 62A is transmitted to circuit board 44 of electrical assembly 38 via wires W1, W2, W3, and W4. The circuit board 44 then rectifies the power received from the winding coil 62A to selectively store the power in the capacitor 54 and/or selectively transmit the power to the outside of the wheel hub assembly 10 via the cable 40, as described in detail below.

The bobbin 62B is non-rotatably coupled to the hub shaft 12. The bobbin 62B has a cylindrical main body, a first flange, and a second flange. The cylindrical main body has an outer periphery, and the winding coil 62A is wound around the outer periphery. The first and second flanges are formed at both axial ends of the cylindrical main body.

In the illustrated embodiment, the housing 42 is disposed between the sprocket support structure 30 and the stator 62. The first surface 42a faces the second axial stator end 68B of the stator 62. The first surface 42a is formed by the outer surface of the end wall portion of the housing 42. Preferably, the housing 42 is disposed adjacent to the stator 62 at the second axial stator end 68B of the stator 62 in the axial direction relative to the rotational center axis A1.

Here, the circuit board 44 is positioned adjacent to the stator 62 at the second axial stator end 68B of the stator 62 in the axial direction relative to the rotational center axis A1. Wires W1 and W2 are connected to the circuit board 44. Specifically, the circuit board 44 has a first axially facing surface 44e that faces the stator 62 and a second axially facing surface 44f that faces away from the stator 62. Here, the wires W1 and W2 are electrically connected to the second axially facing surface 44f of the circuit board 44.

The stator 62's armature further includes a plurality of first yokes 62C and a plurality of second yokes 62D. The first yokes 62C are arranged circumferentially around the hub shaft 12. Similarly, the second yokes 62D are arranged circumferentially around the hub shaft 12, interlaced with the first yokes 62C. The winding coils 62A are located axially around the hub shaft 12 between the first yokes 62C and the second yokes 62D. The first yokes 62C and the second yokes 62D are mounted in grooves on the bobbin 62B so that the first yokes 62C and the second yokes 62D interlace circumferentially around the rotational axis A1. The first yoke 62C and the second yoke 62D can be attached to the bobbin 62B using, for example, an adhesive.

Each of the first yokes 62C can be a stacked yoke composed of multiple layers or a single member. In the case of a stacked yoke, the layers of the first yoke 62C are stacked together in a circumferential direction around the rotational axis A1. The layers of the first yoke 62C are, for example, made of silicon steel sheets (more specifically, non-oriented silicon steel sheets) with an oxide layer formed on the surface. The layers of the first yoke 62C are examples of plate-shaped members.

Similarly, the second yoke 62D can be a stacked yoke composed of multiple layers or a single member. In the case of a stacked yoke, the layers of the second yoke 62D are stacked in a circumferential direction around the rotational axis A1. The layers of the second yoke 62D are, for example, made of silicon steel sheets (more specifically, non-oriented silicon steel sheets) with an oxide layer formed on the surface. The layers of the second yoke 62D are examples of plate-shaped members.

The rotor 64 includes at least one magnet. Here, in the illustrated embodiment, the rotor 64 includes a plurality of first magnet components 64A and a plurality of second magnet components 64B arranged on the inner side of a tubular support member 64C. The tubular support member 64C is fixedly coupled to the inner side of the hub body 14 so that the magnet 64 and the hub body 14 rotate together around the hub shaft 12. The tubular support member 64C has the function of a back yoke. The back yoke is a member with high magnetic permeability that is arranged on the opposite side of the magnetized surface. By using the back yoke, a high generated magnetic field can be obtained. The tubular support member 64C can be omitted. Alternatively, the hub body 14 can include magnets 64 so that the hub body 14 partially forms the generator 60. The first magnetic component 64A and the second magnetic component 64B are arranged so that their south and north poles are staggered in the circumferential direction of the hub shaft 12. Therefore, in the axial direction of the hub shaft 12, the south pole of the first magnetic component 64A is not aligned with the south pole of the second magnetic component 64B, and the north pole of the first magnetic component 64A is not aligned with the north pole of the second magnetic component 64B.

As mentioned above, the winding coil 62A is shown as being fixed relative to the hub axle 12, and the magnet 64 is shown as being fixed relative to the hub body 14. Alternatively, the winding coil 62A can be fixed relative to the hub body 14, and the magnet 64 can be fixed relative to the hub axle 12.

As seen in Figures 6 and 10-12, wires W1 and W2 are electrically connected to stator 62 at a first axial stator end 68A of stator 62. Wires W1 and W2 extend axially through the armature of stator 62. More specifically, wires W1 and W2 extend axially between first yoke 62C and second yoke 62D of stator 62. Thus, wires W1 and W2 extend axially through armature 62 at a point radially outward of winding coil 62A.

The cable 40 is electrically connected to the circuit board 44 and extends from the wheel hub body 14 . Thus, the cable 40 is electrically connected to the generator 60 via the circuit board 44 . The other end of the cable 40 is electrically connected to another electrical component of the human-powered vehicle V, such as the rear derailleur RD, the battery pack BP, or the electrical wiring. In this way, the cable 40 can supply power generated by the wheel hub assembly 10 to the rear derailleur RD, the battery pack BP, or another electrical component. The cable 40 can also be used to transmit signals from the electronic controller 48 of the circuit board 44 to the rear derailleur RD or another electrical component using power line communication (PLC).

As seen in Figure 5 , the cable 40 enters the hub body 10 through the opening 18b of the end cap 18. The cable 40 then extends axially along the hub shaft 12 and through the bearing spacer 28. The cable 40 passes through the cover 46 and into the housing 42 of the electrical assembly 38. Inside the housing 42 of the electrical assembly 38, the cable 40 is electrically connected to the circuit board 44. Preferably, as in the illustrated embodiment, the cable 40 is positioned within an axially extending recess or groove 12d of the hub shaft 12. Thus, the groove 12d forms a cable receiving channel. An axially extending recess or groove 12d extends at least from the second axial end 12b to the inside of the housing 42 of the electrical assembly 38. In this manner, the hub shaft 12 includes a cable receiving passage extending axially between the electrical assembly 38 and the second axial end 12b of the hub shaft 12. Here, the groove 12d extends from the second axial end 12b past the generator 60.

Referring now to Figures 14, 15, 17, and 18, cable 40 has a first cable end 40a and a second cable end 40b. First cable end 40a is electrically connected to electrical component 38. Here, first cable end 40a of cable 40 enters first surface 42a of housing 42. Second cable end 40b is separated from first cable end 40a by a middle section 40c of cable 40.

The middle section 40c of the cable 40 is wrapped around the guide portion 43a at least once to secure the middle section 40c of the cable 40 against the guide portion 43a. Although the middle section 40c is wrapped around the guide portion 43a only once in this embodiment, the middle section 40c can be wrapped around the guide portion 43a two or more times as needed and/or desired. A cable junction 70 is formed in the middle section 40c of the cable 40 to limit movement of the cable 40 relative to the electrical component 38. That is, here, the middle section 40c of the cable 40 extends beyond itself to form the cable junction 70 on the first surface 42a of the housing 42. Furthermore, in the illustrated embodiment, a portion of the middle section 40c of the cable 40 extends at least partially in the direction away from the electrical assembly 38. That is, the middle section 40c of the cable 40 extends partially from the second surface 42b in the direction away from the electrical assembly 38. Because the trench 12d (cable receiving channel) extends from the second axial end 12b to the inside of the housing 42 of the electrical assembly 38, the middle section 40c of the cable 40 can be at least partially disposed in the trench 12d. In other words, the middle section 40c of the cable 40 is at least partially disposed in the cable receiving channel.

Preferably, as shown in FIG. 17 , the middle section 40c of the cable 40 includes a winding portion 40c1 wound around the guide portion 43a, a first intersection portion 40c2, and a second intersection portion 40c3. The first intersection portion 40c2 extends beyond the second intersection portion 40c3 at the intersection point PT of the middle section 40c of the cable 40.

The wheel hub assembly 10 further includes two fixing plates 76 and 78 disposed on the wheel hub shaft 12 to non-rotatably couple the stator 62 of the generator 60 to the wheel hub shaft 12. The fixing plates 76 and 78 are disposed on opposite ends of the generator 60. The fixing plates 76 and 78 are plate-shaped. The fixing plate 76 includes a plurality of protrusions 76a, and the fixing plate 78 includes a plurality of protrusions 78a. One of the protrusions 76a of the fixing plate 76 is disposed in the groove 12d of the wheel hub shaft 12. Similarly, one of the protrusions 78a of the fixing plate 78 is disposed in the groove 12d of the wheel hub shaft 12. The other protrusions 76a and 78a are positioned in the other two axially extending grooves 12e of the hub shaft 12. By inserting protrusions 76a and 78a into these grooves 12d and 12e of the hub shaft 12, the fixing plates 76 and 78 are prevented from rotating relative to the hub shaft 12. By engaging the stator 62 with the protrusions 76b and 78b projecting from the axially facing surface of the fixing plate 76 and the axially facing surface of the fixing plate 78, the stator 62 of the generator 60 is prevented from rotating relative to the hub shaft 12. The fixing plates 76 and 78 are configured to clamp the stator 62 of the generator 60 from both sides of the stator 62 in the axial direction. Alternatively, rotation of the fixing plates 76 and 78 relative to the hub axle 12 can also be inhibited by providing D-shaped cutouts that mate with corresponding outer surfaces of the hub axle 12. Alternatively, one of the pair of fixing plates 76 and 78 can be omitted.

Alternatively, the housing 42 can be non-rotatably coupled to one of the fixing plates 78 to inhibit rotation of the housing 42 relative to the wheel hub shaft 12. For example, the keying protrusion 42d of the housing 42 is configured to engage an opening 78c of the fixing plate 78, which is keyed to the groove 12d of the wheel hub shaft 12. The fixing plate 78 includes a plurality of openings 78c corresponding to the keying protrusion 42d. In this manner, the housing 42 is prevented from rotating relative to the wheel hub shaft 12. Alternatively, the housing 42 can be attached to the bearing spacer 28, which is non-rotatably coupled to the wheel hub shaft 12. The nut 80 is screwed onto the hub shaft 12 to hold the stator 62 and the housing 42 on the hub shaft 12.

Referring now to Figures 19 to 21 , an electrical assembly 138 that can be used in a wheel hub assembly is illustrated. Specifically, the electrical assembly 38 of the wheel hub assembly 10 can be replaced by the electrical assembly 138. Here, the electrical assembly 138 includes a modified housing 142 having a housing 145 and a cover 146. The electrical assembly 138 is identical to the electrical assembly 38, except that the guide portion 43a of the spacer 43 has been integrated into the electrical assembly 138. More specifically, the guide portion 145a is included in the electrical assembly 38. Here, the guide portion 145a is included in the housing 42. The guide portion 145a is manufactured as a separate component and can be attached to the housing 142 as part of the housing 142. The guide portion 145a can be integrally manufactured with the housing 145 or the cover 146. The housing 145 and the guide portion 145a can be formed as a single, one-piece component. However, the guide portion 145a can be integrally formed as part of the cover 146. The cover 146 and the guide portion 145a can also be formed as a single, one-piece component. In either case, the guide portion 145a is configured so that the middle section 40c of the cable 40 is wrapped around the guide member 145a at least once, thereby securing the middle section 40c of the cable 40 against the guide portion 145a. The guide portion 145a defines an opening 138a for receiving the hub axle 12. Therefore, the guide portion 145a is also configured to receive the hub axle 12 therethrough. Since the electrical assembly 138 differs from the electrical assembly 38 only in having the guide portion 145a integrated therewith, the electrical assembly 138 will not be discussed in further detail. Furthermore, other components of the electrical assembly 138 that are identical to those of the electrical assembly 38 will be given the same reference numerals.

As seen in FIG. 22 , a hub shaft 212, which can be used in hub assembly 10, is shown replacing hub shaft 12 and spacer 43. Thus, cable 40 is directly wrapped around the outer peripheral surface of hub shaft 212 without using spacer 43 or guide portion 145a. Specifically, hub shaft 212 is identical to hub shaft 12, except that the diameter of the outer peripheral surface of hub shaft 212 has been increased to directly support electrical components 38 without using spacer 43. In other words, guide portion 243 is included in hub shaft 212. The guide portion 243 is constructed so that the middle section 40c of the cable 40 is wrapped around the guide portion 243 at least once to hold the middle section 40c of the cable 40 against the guide portion 243. In this way, the cable 40 is directly wrapped around the guide portion 243 formed on the hub shaft 212.

In understanding the scope of the present invention, the terms "include," "comprising," and their derivatives are used herein as open-ended terms to define the presence of stated features, elements, components, groups, integers, and/or steps, but do not exclude the presence of other unstated features, elements, components, groups, integers, and/or steps. The foregoing also applies to words with similar meanings, such as "including," "having," and their derivatives. Furthermore, the terms "part," "section," "portion," "member," or "element," when used in the singular, can have the dual meaning of referring to a single part or a plurality of parts, unless otherwise indicated.

As used herein, the following directional terms "frame-facing side," "non-frame-facing side," "forward," "rearward," "front," "rear," "up," "down," "above," "below," "upward," "downward," "top," "bottom," "side," "vertical," "horizontal," "perpendicular," and "cross-sectional," and any other similar directional terms, refer to those directions of the human-powered vehicle (e.g., a bicycle) in an upright riding position and equipped with the wheel hub assembly. Accordingly, these directional terms as utilized to describe the wheel hub should be interpreted relative to the human-powered vehicle (e.g., a bicycle) in an upright riding position and equipped with the wheel hub assembly on a horizontal surface. The terms "left" and "right" are used to designate "right" when referring to the right side when viewed from the rear of a human-powered vehicle (e.g., a bicycle), and to designate "left" when referring to the left side when viewed from the rear of a human-powered vehicle (e.g., a bicycle).

As used in this disclosure, the term "at least one of" means "one or more" of the desired options. For example, if the number of options is two, the term "at least one of" as used in this disclosure means "only a single option" or "both of the two options." For another example, if the number of options is equal to or greater than three, the term "at least one of" as used in this disclosure means "only a single option" or "any combination of equal to or greater than two options." Furthermore, the term "and/or" as used in this disclosure means "either or both."

Furthermore, it will be understood that although the terms "first" and "second" may be used herein to describe various components, these components should not be limited by these terms. These terms are merely used to distinguish one component from another. Thus, for example, the first element discussed above could be referred to as the second element, and vice versa, without departing from the teachings of the present invention.

As used herein, the terms "attached" and "attached" encompass configurations in which one element is directly secured to another element by directly securing the element to the other element; configurations in which one element is indirectly secured to the other element by securing the element to an intermediate member, which is then secured to the other element; and configurations in which one element is integrally formed with another element (i.e., one element is essentially a part of the other). This definition also applies to words of similar meaning such as "joined," "connected," "coupled," "mounted," "bonded," "fixed," and their derivatives. Finally, terms of degree such as "substantially," "approximately," and "approximately" as used herein mean an amount of variation in the modified term such that the end result is not significantly changed.

While only selected embodiments have been chosen to illustrate the present invention, it will be apparent to those skilled in the art from this disclosure that various changes and modifications can be made herein without departing from the scope of the present invention as defined in the appended claims. For example, unless expressly stated otherwise, the size, shape, position, or orientation of the various components can be modified as needed and/or desired, provided such changes do not materially affect their intended function. Components shown as directly connected or contacting each other can have intermediate structures disposed therebetween, provided such changes do not materially affect their intended function, unless expressly stated otherwise. The functions of one element can be performed by two, and vice versa, unless expressly stated otherwise. The structure and functionality of one embodiment can be adopted in another embodiment. All advantages need not be present in a particular embodiment at the same time. Every feature that is unique compared to the prior art, whether alone or in combination with other features, should be considered a separate description of the applicant's further inventions, including the structural and/or functional concepts embodied by such features. Therefore, the foregoing description of embodiments according to the present invention is for illustration only and is not intended to limit the invention as defined by the appended patent claims and their equivalents.

12: Wheel hub

12d: Groove

12e: Groove

36: Electrical assembly

38: Electrical components

40: Cable

40a: First cable end

40b: Second cable end

40c: Middle section

40c1: Coiled section

40c2: First intersection

40c3: Second intersection

42a: First surface

42d: Keying protrusion

43: Spacer

45: Shell

A1: Rotational axis

PT: Meeting Point

W1: Wire

W2:Wire

Claims (17)

A wheel hub assembly for a human-powered vehicle, the wheel hub assembly comprising: an electrical assembly, the electrical assembly comprising: an electrical component; and a cable having a first cable end and a second cable end, the first cable end being electrically connected to the electrical component, the second cable end being separated from the first cable end by a middle section of the cable, a cable junction being formed in the middle section of the cable to limit the cable from moving relative to the electrical component. movement; a hub shaft having a first axial end and a second axial end; and a hub body rotatably mounted on the hub shaft to rotate about a rotational center axis of the hub assembly; and a guide portion, wherein the middle section of the cable is wound around the guide portion at least once to retain the middle section of the cable against the guide portion, and the electrical component is non-rotatably disposed on the hub shaft. The wheel hub assembly for a human-powered vehicle as claimed in claim 1, wherein the middle section of the cable includes a winding portion wound around the guide portion, a first intersection portion, and a second intersection portion, the first intersection portion extending beyond the second intersection portion at an intersection point of the middle section of the cable. The wheel hub assembly for a human-powered vehicle as claimed in claim 1, wherein a portion of the middle section of the cable at least partially extends in a direction away from the electrical component. The wheel hub assembly for a human-powered vehicle as claimed in claim 1, wherein the electrical component includes a housing having a first surface and a second surface, the second surface being located on an opposite side of the electrical component relative to the first surface. The wheel hub assembly for a human-powered vehicle as claimed in claim 4, wherein the first cable end of the cable enters the first surface of the housing, the middle section of the cable partially extends from the second surface in a direction away from the electrical component, and the middle section of the cable extends beyond itself to form the cable junction on the first surface of the housing. The wheel hub assembly for a human-powered vehicle as claimed in claim 1, wherein the electrical component includes a circuit board, and the first cable end of the cable is electrically connected to the circuit board. The wheel hub assembly as described in claim 1 further includes a guide portion, and the guide portion is included in the wheel hub shaft. The wheel hub assembly of claim 1 further includes a guide portion and a spacer disposed between the wheel hub shaft and the electrical component in a radial direction relative to the rotational center axis, wherein the guide portion is included in the spacer. The wheel hub assembly as described in claim 1 further includes a guide portion, and the guide portion is included in the electrical component. The wheel hub assembly of claim 9, wherein the electrical component includes a housing, and the guide portion is included in the housing. The wheel hub assembly of claim 1, wherein the electrical component includes a housing having a first surface facing the first axial end of the wheel hub shaft, a second surface facing the second axial end of the wheel hub shaft, and an opening extending from the first surface to the second surface, and the wheel hub shaft extends through the opening of the electrical component. The hub assembly of claim 1, wherein the hub shaft includes a cable receiving channel extending axially between the electrical component and the second axial end of the hub shaft, and the middle section of the cable is at least partially disposed in the cable receiving channel. The wheel hub assembly of claim 1, wherein the electrical component includes a circuit board, and the circuit board is arranged perpendicular to the rotation center axis. The wheel hub assembly of claim 13 further comprises at least one capacitor electrically connected to the circuit board. The wheel hub assembly of claim 1 further includes a generator disposed on the wheel hub body and configured to generate electricity by the rotation of the wheel hub body. The wheel hub assembly of claim 1 further includes a sprocket support structure rotatably disposed about the rotation center axis so as to transmit driving force to the wheel hub body while rotating about the rotation center axis in the driving rotation direction. The wheel hub assembly of claim 16 further includes a detected component disposed on the sprocket support structure, and a rotation detection sensor configured to detect the detected component to detect rotation of the sprocket support structure about the rotation center axis.