wheel hub

Abstract

A hub that enables miniaturization of a rotating body. The hub is a hub (10) disposed on a human-powered vehicle (A) and includes: a hub axle (12); a hub body (14) rotatable about the hub axle (12); a rotating body (16) rotatably connected to the hub body (14) about the hub axle (12); a first electronic component (20) at least partially housed in the hub body (14); and a second electronic component (22) at least partially housed in the rotating body (16) in a manner electrically connected to the first electronic component (20).

Description

Technical Field

[0001] This invention relates to a wheel hub. Prior Technology

[0002] A hub dynamo is known to supply power to components mounted on a human-powered vehicle. For example, Patent Document 1 describes a hub equipped with electronic components for controlling the power of the generator. [Previous Technical Documents] [Patent Literature]

[0003] Patent Document 1: Japanese Patent Application Publication No. 2018-95215 Summary of the Invention

[0004] [The problem that the invention aims to solve] However, electronic components with lower heat resistance are preferably located away from the power generation unit. In Patent Document 1, the electronic components are housed within a rotating body on which a sprocket is mounted on the outer circumference. Thus, the electronic components in Patent Document 1 are located away from the power generation unit housed in the hub body. However, by housing larger electronic components such as energy storage units within the rotating body, the diameter of the portion of the rotating body housing the electronic components increases. Therefore, the assembly of the hub and the mounting of the sprocket to the rotating body become more complex.

[0005] One of the objectives of this invention is to provide a hub for miniaturizing rotating bodies. [Methods for solving problems]

[0006] The first aspect of the present invention is a wheel hub disposed in a human-powered vehicle, characterized by comprising: a hub axle; a hub body rotatable about the hub axle; a rotating body rotatably connected to the hub body about the hub axle; a first electronic component at least partially housed in the hub body; and a second electronic component at least partially housed in the rotating body in a manner electrically connected to the first electronic component.

[0007] When using the first-state hub, since the electronic components are separately disposed in the hub body and the rotating body, larger electronic components can be housed as first electronic components in the hub body, and electronic components with lower heat resistance and electronic components that detect the number of crank rotations can be housed as second electronic components in the rotating body. In this way, the rotating body can be miniaturized.

[0008] In the hub of the second state according to the first state, the aforementioned first electronic component includes a power storage device.

[0009] When the hub is designed according to the second state, the energy storage device is installed on the hub body, which allows the rotating body to be miniaturized.

[0010] In the wheel hub of the third state according to the first or second state, the aforementioned first electronic component is a control device that controls the bicycle's gear shifting mechanism.

[0011] When using a hub in the third state, the control device is located on the hub body, which allows for miniaturization of the rotating body.

[0012] In the fourth state of the wheel hub according to any one of the first to third states, the aforementioned first electronic component includes a sensor for detecting the posture of the aforementioned human-powered vehicle.

[0013] When the hub is based on the fourth state, the sensor is installed on the hub body, which allows the rotating body to be miniaturized.

[0014] In the fifth state of the wheel hub according to any one of the first to fourth states, the aforementioned first electronic component includes a wireless communication device.

[0015] When the hub is designed according to the fifth state, the wireless communication device is installed on the hub body, which allows the rotating body to be miniaturized.

[0016] In the sixth state of the hub according to any one of the states 1 to 5, a bearing is further provided, which is disposed between the first electronic component and the second electronic component in a manner that can rotatably support the hub shaft and the rotating body.

[0017] When using the hub in the sixth state, since the second electronic component is located far from the first electronic component, each electronic component can be placed in a better position based on its properties and functions.

[0018] In the hub according to the seventh state of the sixth state, the aforementioned first electronic component is connected to an external device via a first cable passing through the inner side of the aforementioned bearing.

[0019] When the hub is based on the 7th state, the wiring of the first cable can be simplified.

[0020] In the 8th state of the hub according to the 6th or 7th state, the aforementioned second electronic component is connected to the aforementioned first electronic component through a second cable passing through the inner side of the aforementioned bearing.

[0021] When using the hub of state 8, the wiring of the second cable can be simplified.

[0022] In the 9th state of the hub according to any one of the 1st to 8th states, the aforementioned first electronic component is fixed to the aforementioned hub axle.

[0023] When the hub is based on the 9th state, the first electronic component can be easily installed.

[0024] In the hub of the 10th state according to any one of the 1st to 9th states, the aforementioned second electronic component is configured such that the aforementioned first electronic component does not rotate.

[0025] When using the hub of the 10th state, the connection between the first electronic component and the second electronic component can be simplified.

[0026] In the hub according to the 11th state of the 10th state, the aforementioned second electronic component includes a sensor that detects the rotation of the aforementioned rotating body.

[0027] When the hub of the 11th state is used, the number of rotations of the rotating body can be measured.

[0028] In the hub of the 12th state according to the 11th state, the aforementioned sensor is configured to detect the detected part provided on the aforementioned rotating body.

[0029] When the hub of the 12th state is used, the number of rotations of the rotating body can be measured.

[0030] In the hub of the 13th state according to the 12th state, the aforementioned detected part includes a magnet; the aforementioned sensor is configured to detect the magnetic force of the aforementioned magnet.

[0031] When using the hub of the 13th state, the number of rotations of the rotating body can be measured by magnetic force.

[0032] The hub of the 14th state, which is in accordance with any of the states 1 to 13, includes a power generation unit that generates electricity by means of the relative rotation of the hub shaft and the hub body.

[0033] When the hub is designed according to the 14th state, it can generate electricity through a simple configuration.

[0034] In the hub according to the 15th state of the 14th state, the aforementioned power generation unit includes: a stator disposed on the aforementioned hub shaft; and a rotor disposed on the aforementioned hub body.

[0035] When the hub is designed according to the 15th state, it can generate electricity through a simple configuration.

[0036] In the hub of the 16th state according to any one of the states 1 to 15, the aforementioned rotating body is configured to support the sprocket.

[0037] When using a hub based on the 16th state, the sprocket can be easily installed because the rotating body is small.

[0038] In the 17th state of the hub according to any one of the 1st to 16th states, the aforementioned rotating body is configured to transmit the rotation of the aforementioned rotating body in a first rotation direction to the aforementioned hub body; the aforementioned rotating body is configured to not transmit the rotation of the aforementioned rotating body in a second rotation direction opposite to the aforementioned first rotation direction to the aforementioned hub body.

[0039] When the hub is based on the 17th state, even if the rotating body is small, it is still possible to form a structure in which the rotating body transmits the rotation in the first rotation direction to the hub body, but does not transmit the rotation in the second rotation direction to the hub body. [Invention Effects]

[0040] According to the present invention, it is possible to achieve the effect of miniaturizing the rotating body. Simple Explanation of the Diagram

[0041] [Figure 1] is a schematic diagram of a human-powered vehicle including the wheel hub of the implementation form. [Figure 2] is a cross-sectional view of the wheel hub in the implementation form. [Figure 3] is a block diagram of a power supply system including the hub in an implementation form. [Figure 4] is a cutaway view of the wheel hub in the implementation form. Implementation

[0042] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings. The present invention is not limited to any particular embodiment; in the case of a plurality of embodiments, it includes a configuration in which the various embodiments are combined together. For example, although the embodiment described focuses on a bicycle as the human-powered vehicle, the human-powered vehicle can also be any other human-powered vehicle.

[0043] The implemented form of a human-powered vehicle A is a vehicle that can be driven by at least human power. The number of wheels in human-powered vehicle A is not limited and includes vehicles with one wheel or more wheels, such as unicycles. Human-powered vehicle A includes various types of bicycles, such as mountain bikes, road bikes, city bikes, cargo bikes, handcycles, and recumbent bikes, as well as e-bikes. E-bikes include electric-assisted bicycles that use an electric motor to assist in propulsion. Vehicles that use only power sources other than human power are not included in human-powered vehicle A. In particular, vehicles that use only internal combustion engines as their power source are not included in human-powered vehicles. Generally, human-powered vehicle A is assumed to be a small, light vehicle, and it is assumed that a driver's license is not required for road driving.

[0044] As shown in Figure 1, the human-powered vehicle A is a bicycle. Specifically, the human-powered vehicle A shown in the figure is a road bicycle. The human-powered vehicle A has a frame A1, a front fork A2, a front wheel WF, a rear wheel WR, handlebars H, a drive unit B, and a plurality of components C0. The human-powered vehicle A further includes a hub 10 containing a generator 18.

[0045] Drive component B comprises a crank C, a first rotating body D1, a second rotating body D2, and a connecting component D3. Crank C comprises a crankshaft C1 and a plurality of crank arms C2. The crankshaft C1 is rotatably supported on the frame A1. The plurality of crank arms C2 are respectively fixed to both ends of the crankshaft C1 in the axial direction. A pedal PD is rotatably mounted at the front end of each crank arm C2. Although drive component B in this embodiment is a chain drive type, any type can be selected, such as a belt drive type or a shaft drive type.

[0046] The first rotating body D1 is mounted on the crank C in a manner that rotates integrally with the crankshaft C1. The first rotating body D1 includes one or a plurality of sprockets with different numbers of teeth. When the first rotating body D1 includes a plurality of sprockets, the plurality of sprockets are interconnected. The second rotating body D2 is mounted on the hub 10 of the rear wheel WR. The second rotating body D2 includes one or a plurality of sprockets D21 with different numbers of teeth. The plurality of sprockets D21 are interconnected. The connecting member D3 includes a chain. The connecting member D3 transmits the force input to the crank C from the first rotating body D1 to the second rotating body D2. The connecting member D3 is wound around the first rotating body D1 and the second rotating body D2. The driving force applied to the pedal PD by the user riding on the human-powered vehicle A is transmitted to the rear wheel WR through the first rotating body D1, the connecting member D3, and the second rotating body D2.

[0047] The plurality of component COs includes an operated device that actuates according to input to the operating device OP. In this embodiment, the plurality of component COs includes: a transmission T, a braking device BD, a shock absorber SU, an adjustable seat post ASP, and a walking assistance device E. Various external component COs are not limited to this embodiment. The plurality of component COs need only include at least one component CO. The transmission T, braking device BD, shock absorber SU, adjustable seat post ASP, and walking assistance device E each include a movable member and an actuator for actuating the movable member. The actuator may include, for example, an electric motor. Component COs may operate by power supplied from the hub 10 including the generator 18, power supplied from the battery BT mounted on the human-powered vehicle A, or power supplied from a dedicated power source mounted on each component CO.

[0048] The transmission T includes an externally mounted transmission mechanism. In this embodiment, the transmission T includes a front derailleur TF and a rear derailleur TR. The front derailleur TF is a first rotating body D1 mounted on the frame A1. By changing the sprocket of the first rotating body D1, which is wound around the connecting member D3, the gear ratio of the manually driven vehicle A can be changed. The rear derailleur TR is located at the rear end of the frame A1. By changing the sprocket D21 of the second rotating body D2, which is wound around the connecting member D3, the gear ratio of the manually driven vehicle A can be changed. The transmission T operates, for example, according to the operation of a transmission operating device, a brake operating device, a transmission operating device and a brake operating device integrated into one, or a transmission / brake operating device. The transmission T may also include an internally mounted transmission mechanism.

[0049] The braking system BD comprises braking devices BD corresponding to the number of wheels. In this embodiment, the braking system BD is installed on the front wheel WF and the rear wheel WR. The two braking devices BD can have the same configuration or different configurations. The braking system BD is, for example, a rim brake device. The braking system BD operates according to the operation of a brake operating device or a gear shift / brake operating device. The braking system BD can also be a disc brake device.

[0050] The shock absorber SU comprises at least one front shock absorber and a rear shock absorber. In this embodiment, the shock absorber SU comprises a front shock absorber. The front shock absorber operates to mitigate impacts received by the front wheel WF from the ground. The rear shock absorber operates to mitigate impacts received by the rear wheel WR from the ground. The shock absorber SU is electrically driven, for example, according to the operation of a shock absorber operating device. Specifically, the operating state of the shock absorber SU can be changed according to the operation of the shock absorber operating device. The operating state of the shock absorber SU includes at least one of displacement state, travel amount, damping force, and rebound force.

[0051] The adjustable seatpost ASP changes the height of the saddle SD relative to the frame A1. The adjustable seatpost ASP operates, for example, according to the operation of the adjustable seatpost control device.

[0052] The walking assistance device E outputs an auxiliary driving force to assist in the propulsion of the vehicle A by human power. The walking assistance device E operates, for example, according to the driving force applied to the pedal PD. The walking assistance device E operates, for example, according to the operation of the walking assistance control device. The walking assistance device E includes an electric motor as an actuator and a housing. The electric motor is housed within the housing.

[0053] The operating device OP operates the component CO mounted on the human-powered vehicle A. The operating device OP receives user input. The operating device OP may include, for example, at least one of a transmission / brake operating device, a shock absorber operating device, an adjustable seat post operating device, and a walking assistance operating device.

[0054] As shown in Figure 2, the hub 10 is a hub generator. In this embodiment, the hub 10 is located on the rear wheel WR. In this embodiment, the hub 10 is mounted on the frame A1. The hub 10 includes a hub axle 12, a hub body 14, a rotating body 16, a generator 18, a first electronic component 20, a second electronic component 22, bearings 24, 26, 28, and 30. The hub 10 further includes a first cable 32 and a second cable 34.

[0055] The hub axle 12 is cylindrical. The central axis CA of the hub axle 12 is aligned with the rotation axis of the rear wheel WR. The hub axle 12 is mounted to the rear end of the frame A1 using, for example, a known fixing mechanism. The fixing mechanism includes a connecting shaft 36. The connecting shaft 36 is inserted into the inner side of the hub axle 12.

[0056] The hub body 14 is cylindrical. The hub body 14 is positioned radially apart from the hub shaft 12. The hub body 14 is rotatable around the hub shaft 12. The hub body 14 is supported by a bearing 24 to allow rotation around the hub shaft 12. The axis of rotation of the hub body 14 coincides with the central axis CA of the hub shaft 12. The hub body 14 is positioned alongside the rotating body 16 in an axial direction parallel to the central axis CA of the hub shaft 12. The hub body 14 includes a cylindrical portion 14a, a hub portion 14b, and a pair of flange portions 14c and 14d.

[0057] The cylindrical portion 14a is configured in a cylindrical shape. A power generation unit 18 and a first electronic component 20 are provided on the inner side of the cylindrical portion 14a in the radial direction.

[0058] The hub portion 14b is cylindrical. The hub portion 14b has a smaller diameter than the cylindrical portion 14a. The hub portion 14b is integrally formed with the cylindrical portion 14a. The hub portion 14b protrudes axially from one end of the cylindrical portion 14a. The hub portion 14b is located on the opposite side of the rotating body 16 relative to the cylindrical portion 14a. A bearing 24 is provided on the radially inner side of the hub portion 14b.

[0059] Flanges 14c and 14d are annular in shape. Flanges 14c and 14d are spaced apart from each other in the axial direction. Flanges 14c and 14d protrude radially outward from both ends of the cylindrical portion 14a. Flange 14c protrudes radially outward from the outer circumferential surface of the cylindrical portion 14a on the rotating body 16 side. Flange 14d protrudes radially outward from the outer circumferential surface of the cylindrical portion 14a on the hub portion 14b side. The spokes of the rear wheel WR are mounted on flanges 14c and 14d.

[0060] The rotating body 16 is cylindrical. A second electronic component 22 is disposed on the inner radial side of the rotating body 16. The rotating body 16 is disposed radially spaced from the hub shaft 12. The rotating body 16 is configured to rotate around the hub shaft 12. The rotating body 16 is supported by a bearing 26, a transmission member 38, and the bearing 28 to enable rotation around the hub shaft 12. The rotation axis of the rotating body 16 coincides with the central axis CA of the hub shaft 12 and the rotation axis of the hub body 14. The rotating body 16 includes a ratchet tooth 16a. The ratchet tooth 16a is formed in the circumferential direction on the inner circumferential surface of the hub body 14. The rotating body 16 is disposed side-by-side with the hub body 14 in an axial direction parallel to the central axis CA of the hub shaft 12. The rotating body 16 is connected to the hub body 14. The rotating body 16 is connected to the hub body 14 through the transmission component 38 and the bearing 30.

[0061] The transmission member 38 includes a large-diameter portion 38a, a small-diameter portion 38b, and a wall portion 38c. The large-diameter portion 38a is cylindrical and located radially inside the hub body 14. The small-diameter portion 38b is cylindrical and located radially inside the rotating body 16. The wall portion 38c is annular and protrudes radially outward from the end of the small-diameter portion 38b near the large-diameter portion 38a. The wall portion 38c also protrudes radially inward from the end of the large-diameter portion 38a near the small-diameter portion 38b. The transmission member 38 is fixed to the hub body 14 by a fixing member 40, which is annular. The fixing member 40 is provided at the end of the hub body 14 on the side near the rotating body 16, covering the wall portion 38c of the transmission member 38. A ratchet pawl 42 is movably provided on the small-diameter portion 38b of the transmission member 38. The ratchet pawl 42 is formed in the circumferential direction on the outer peripheral surface of the small-diameter portion 38b. The ratchet pawl 42 engages with the ratchet teeth 16a of the rotating body 16.

[0062] The rotating body 16 comprises a plurality of sprockets D21 capable of supporting the second rotating body D2. The rotating body 16 is configured to rotate integrally with the plurality of sprockets D21. The rotating body 16 is configured to transmit the rotation in the first rotational direction R1 of the rotating body 16 to the transmission member 38 via ratchet teeth 16a and ratchet pawls 42. That is, the rotating body 16 is configured to transmit the rotation in the first rotational direction R1 of the rotating body 16 to the hub body 14. The rotating body 16 is configured to transmit the rotation in the second rotational direction R2, which is opposite to the rotation in the first rotational direction R1 of the rotating body 16, to the transmission member 38 without using ratchet teeth 16a and ratchet pawls 42. That is, the rotating body 16 is configured not to transmit the rotation in the second rotational direction R2 of the rotating body 16 to the hub body 14. The first rotation direction R1 refers to the direction of rotation of the second rotating body D2 when the driving force has been transmitted from the connecting member D3 to the second rotating body D2.

[0063] The power generation unit 18 is configured to generate electricity by the relative rotation of the hub shaft 12 and the hub body 14. The power generation unit 18 is radially disposed between the hub shaft 12 and the hub body 14. More specifically, the power generation unit 18 is radially disposed between the cylindrical portion 14a of the hub shaft 12 and the hub body 14. The power generation unit 18 is axially disposed alongside the first electronic component 20. The power generation unit 18 is disposed closer to the flange portion 14d than the first electronic component 20. The power generation unit 18 includes a stator 18a, a rotor 18b, and a coil 18c.

[0064] The stator 18a is mounted on the hub shaft 12. The central axis of the stator 18a coincides with the central axis CA of the hub shaft 12. The stator 18a rotates integrally with the hub shaft 12. The stator 18a is located radially inside the rotor 18b.

[0065] The rotor 18b is cylindrical. The rotor 18b is mounted on the hub body 14. The rotor 18b is fixed to the inner circumferential surface of the cylindrical portion 14a of the hub body 14. The rotation axis of the rotor 18b is aligned with the central axis CA of the hub shaft 12 and the rotation axis of the hub body 14. The rotor 18b rotates integrally with the hub body 14. The rotor 18b is located radially outward of the stator 18a.

[0066] Coil 18c is disposed on stator 18a. When rotor 18b rotates together with hub body 14, an electromagnetic force is generated between stator 18a and rotor 18b, and an induced electromotive force is generated in coil 18c. Coil 18c is electrically connected to first electronic component 20. The current flowing to coil 18c is supplied to first electronic component 20.

[0067] When a passenger applies a driving force to the pedal PD shown in Figure 1, causing the first rotating body D1 to rotate in the positive rotation direction, the second rotating body D2 will rotate in the first rotation direction R1 via the connecting member D3. The positive rotation direction refers to the direction in which the first rotating body D1 rotates to propel the human-powered vehicle A forward. Rotating body 16 rotates integrally with the second rotating body D2 in the first rotation direction R1. The rotation of rotating body 16 is transmitted to the hub body 14 via the transmission member 38. The rotor 18b rotates integrally with the hub body 14 around the stator 18a. The relative rotation of the rotor 18b and stator 18a generates an induced electromotive force in the coil 18c. That is, the generator 18 generates electricity as the human-powered vehicle A moves.

[0068] The first electronic component 20 is fixed to the hub shaft 12. The first electronic component 20 is disposed radially between the hub shaft 12 and the hub body 14. The first electronic component 20 is at least partially housed in the hub body 14. The first electronic component 20 is disposed on the rotating body 16 side relative to the power generation unit 18.

[0069] As shown in Figure 2, the first electronic component 20 is housed within the internal space of the frame 44. The frame 44 is radially disposed between the hub shaft 12 and the cylindrical portion 14a of the hub body 14. The frame 44 includes an outer cylindrical portion 44a, an inner cylindrical portion 44b, and a wall portion 44c. The internal space of the frame 44 is formed by the outer cylindrical portion 44a, the inner cylindrical portion 44b, and a pair of wall portions 44c and 44d.

[0070] The outer cylindrical portion 44a is configured in a cylindrical shape. The outer cylindrical portion 44a is located radially outward of the inner cylindrical portion 44b. The outer cylindrical portion 44a is provided radially with a gap between it and the cylindrical portion 14a of the hub body 14.

[0071] The inner cylindrical portion 44b is cylindrical in shape. The inner cylindrical portion 44b is located radially inside the outer cylindrical portion 44a. The inner circumferential surface of the inner cylindrical portion 44b is fixed to the outer circumferential surface of the hub shaft 12. The inner cylindrical portion 44b rotates integrally with the hub shaft 12.

[0072] Wall portions 44c and 44d are arranged in a ring shape. Wall portions 44c and 44d are spaced apart from each other in the axial direction. Wall portion 44c is arranged in the axial direction to cover the openings of the outer cylindrical portion 44a and the inner cylindrical portion 44b, which are the ends serving as the power generation section 18. Wall portion 44d is arranged in the axial direction to cover the openings of the outer cylindrical portion 44a and the inner cylindrical portion 44b, which are the ends serving as the rotating body 16.

[0073] As shown in Figure 3, the first electronic component 20 is electrically connected to the coil 18c of the power generation unit 18. The first electronic component 20 is also electrically connected to the external device ED. The first electronic component 20 is electrically connected to the second electronic component 22. The hub 10 further includes a first cable 32 and a second cable 34. The first electronic component 20 is connected to the external device ED via the first cable 32. The external device ED includes a plurality of components CO. As shown in Figure 2, the first cable 32 is arranged in the radial direction, passing through the inside of bearings 26, 28, and 30. As shown in Figure 3, the first electronic component 20 is connected to the second electronic component 22 via the second cable 34. As shown in Figure 2, the second cable 34 is arranged in the radial direction, passing through the inside of bearings 26, 28, and 30. As shown in Figure 3, the first electronic component 20 includes a power storage device 20a, a control device 20b, a sensor 20c, and a wireless communication device 20d. The energy storage device 20a, control device 20b, sensor 20c, and wireless communication device 20d are, for example, disposed on an electronic substrate. The electronic substrate is fixed to the frame 44.

[0074] The energy storage device 20a is configured to temporarily store the electricity generated by the power generation unit 18. The energy storage device 20a includes at least one battery and a capacitor. The energy storage device 20a supplies power to the external device ED and the second electronic component 22. The energy storage device 20a also supplies power to the control device 20b, the sensor 20c, and the wireless communication device 20d.

[0075] The control device 20b, located in the wheel hub 10, performs various controls. For example, the control device 20b can also control the power supply to the generator 18, the energy storage of the energy storage device 20a, and the signals from the sensor 20c and the wireless communication device 20d. The control device 20b controls the transmission T of the manually driven vehicle A. The control device 20b can also send signals to the transmission T to automatically change gears based on signals from the sensor 22a of the second electronic component 22 (described later).

[0076] Sensor 20c detects the posture of the manually driven vehicle A. Sensor 20c can be, for example, a tilt sensor that detects the tilt of the manually driven vehicle A. Sensor 20c can also be an acceleration sensor that detects gravitational acceleration.

[0077] The wireless communication device 20d, for example, communicates wirelessly with the energy storage device 20a, the control device 20b, and the sensor 20c. The wireless communication device 20d, for example, communicates wirelessly with at least one component CO.

[0078] As shown in Figure 2, the second electronic component 22 is fixed to the hub shaft 12. The second electronic component 22 is radially disposed between the hub shaft 12 and the rotating body 16. The second electronic component 22 is at least partially housed within the rotating body 16. The second electronic component 22 is spaced apart from the first electronic component 20. Bearings 26, 28, and 30 are axially disposed between the first electronic component 20 and the second electronic component 22. The second electronic component 22 is configured to not rotate the first electronic component 20. The second electronic component 22 is fixed to the first electronic component 20 via the hub shaft 12 and the frame 44. As shown in Figure 3, the second electronic component 22 is electrically connected to the first electronic component 20. The second electronic component 22 is connected to the first electronic component 20 via a second cable 34.

[0079] The second electronic component 22 includes a sensor 22a. The sensor 22a detects the rotation of the rotating body 16. The sensor 22a is, for example, a cadence sensor. The control device 20b of the first electronic component 20 determines the rotational speed of the crank C based on the rotation of the hub shaft 12 detected by the sensor 22a relative to the rotating body 16. The sensor 22a is configured to detect a detected part 46. As shown in FIG2, the detected part 46 is disposed on the rotating body 16. The detected part 46 is fixed to the inner circumferential surface of the rotating body 16. The detected part 46 is disposed on the opposite side of the hub body 14 in the axial direction relative to the second electronic component 22. The detected part 46 is spaced apart from the sensor 22a in the axial direction. The detected part 46 includes a magnet 48. The sensor 22a is configured to detect the magnetic force of the magnet 48.

[0080] Bearing 24 is disposed radially inside the hub portion 14b of the hub body 14. Bearing 24 supports the hub body 14 so that it can rotate relative to the hub shaft 12. Bearing 24 includes an inner race 24a, an outer race 24b, and a plurality of rotating bodies 24c. The inner race 24a is disposed on the hub shaft 12. The inner race 24a is fixed to the outer circumferential surface of the hub shaft 12. The central axis of the inner race 24a coincides with the central axis CA of the hub shaft 12. The inner race 24a rotates integrally with the hub shaft 12. The outer race 24b is disposed on the hub body 14. The outer race 24b is fixed to the inner circumferential surface of the hub portion 14b of the hub body 14. The central axis of the outer race 24b is aligned with the central axis CA of the hub shaft 12 and the rotation axis of the hub body 14. The outer race 24b rotates integrally with the hub body 14. The rotating body 24c is positioned between the inner race 24a and the outer race 24b.

[0081] Bearing 26 is disposed radially inside rotating body 16. Bearing 26 supports transmission member 38 to enable rotation of hub shaft 12. Bearing 26 includes inner race 26a, outer race 26b, and a plurality of rotating bodies 26c. Inner race 26a is disposed on hub shaft 12. Inner race 26a is fixed to the outer circumferential surface of hub shaft 12. The central axis of inner race 26a coincides with the central axis CA of hub shaft 12. Inner race 26a rotates integrally with hub shaft 12. Outer race 26b is fixed to transmission member 38. The central axis of outer race 26b coincides with the central axis CA of hub shaft 12 and the rotation axis of transmission member 38. Outer race 26b rotates integrally with transmission member 38. In this embodiment, the outer race 26b is integrally formed with the inner race 28a of the bearing 28. The rotating body 26c is disposed between the inner race 26a and the outer race 26b.

[0082] Bearing 28 is disposed radially inside rotating body 16. Bearing 28 supports rotating body 16 to enable rotation of transmission member 38. Bearing 28 includes inner race 28a, outer race 28b, and a plurality of rotating bodies 28c. Inner race 28a is fixed to transmission member 38. The central axis of inner race 28a coincides with the central axis CA of hub shaft 12 and the rotation axis of transmission member 38. Inner race 28a rotates integrally with transmission member 38. In this embodiment, inner race 28a is integrally formed with outer race 26b of bearing 26. Outer race 28b is disposed on rotating body 16. Outer race 28b is fixed to the inner circumferential surface of rotating body 16. The central axis of outer race 28b coincides with the central axis CA of hub shaft 12 and the rotation axis of rotating body 16. The outer race 28b rotates integrally with the rotating body 16. The rotating body 28c is positioned between the inner race 28a and the outer race 28b.

[0083] The bearing 30 is disposed radially inside the rotating body 16. The bearing 30 supports the rotating body 16 so that it can rotate relative to the transmission member 38. The bearing 30 includes an inner race 30a, an outer race 30b, and a plurality of rotating bodies 30c. In this embodiment, the inner race 30a is integrally formed with the transmission member 38. In this embodiment, the outer race 30b is integrally formed with the rotating body 16. The rotating bodies 30c are disposed between the inner race 30a and the outer race 30b.

[0084] As shown in Figure 4, in this embodiment, the hub 10 comprises three units. These three units are a first unit 10A, a second unit 10B, and a third unit 10C. The first unit 10A comprises the hub body 14, the rotor 18b of the generator unit 18, the outer race 24b of the bearing 24, and the rotating body 24c. The second unit 10B comprises the hub shaft 12, the stator 18a of the generator unit 18, the coil 18c, the first electronic component 20, and the frame 44. The third unit 10C comprises the rotating body 16, the bearing 28, the bearing 30, the transmission component 38, and the ratchet pawl 42.

[0085] The assembler first assembles the first unit 10A, the second unit 10B, and the third unit 10C separately. Next, the assembler inserts the hub shaft 12 of the second unit 10B into the radially inner side of the transmission member 38 and the rotating body 16 of the third unit 10C, thereby assembling the second unit 10B and the third unit 10C. As shown in Figure 2, the wall portion 44d of the frame 44 and the wall portion 38c of the transmission member 38 are spaced apart. After assembling the second unit 10B and the third unit 10C, the assembler inserts the stator 18a, coil 18c, first electronic component 20, and frame 44 of the second unit 10B into the radially inner side of the hub body 14 of the first unit 10A. In this way, the second unit 10B and the third unit 10C can be assembled with the first unit 10A. The first unit 10A and the third unit 10C are fixed by the fixing member 40 shown in Figure 2.

[0086] The bearing 26, the second electronic component 22, and the tested part 46 shown in Figure 2 are installed at least after the second unit 10B and the third unit 10C are assembled. The fixing member 40 and the inner race 24a of the bearing 24 shown in Figure 2 are installed at least after the second unit 10B, the third unit 10C, and the first unit 10A are assembled.

[0087] Since the second unit 10B of the hub 10 includes the first electronic component 20, malfunctions of the first electronic component 20 can be suppressed, and workability can be improved. The assembly steps of the hub 10 are not limited to this embodiment. When the hub 10 includes a plurality of units, the workability of assembly can be improved, and miniaturization can be facilitated.

[0088] While embodiments of the present invention have been described above, these embodiments are not limited to their specific content. Furthermore, the constituent elements described above include those easily assumed by someone skilled in the art, those that are substantially the same, and those of equal scope. Moreover, the constituent elements described above can be appropriately combined. Furthermore, various omissions, substitutions, or modifications of the constituent elements can be made without departing from the essence of the aforementioned embodiments.

[0089] 10: Wheel hub 10A: Unit 1 10B: Unit 2 10C: Unit 3 12: Wheel hub axle 14: Wheel hub body 14a:Tubular part 14b: Wheel hub 14c, 14d: Flange portion 16: Solid of Revolution 18: Power Generation Department 18a: Stator 18b: Rotor 18c: Coil 20: First Electronic Components 20a: Energy storage device 20b: Control device 20c: Sensor 20d: Wireless communication device 22: Second electronic component 22a: Sensor 24, 26, 28, 30: Bearings 24a, 26a, 28a, 30a: Inner seat ring 24b, 26b, 28b, 30b: Outer seat ring 24c, 26c, 28c, 30c: Rotating bodies 32: First cable 34: Second cable 36: Connecting shaft 38: Transfer components 38a: Large diameter part 38b: Small diameter portion 38c, 44c, 44d: Wall portion 40: Fixed components 42: Ratchet pawl 44: Frame 44a: Outer cylindrical part 44b: Inner cylindrical part 46: The part being tested 48: Magnet A: Human-powered vehicle A1: Chassis A2: Front fork ASP: Adjustable seat post B: Driving components BD: Braking system BT: Battery C: Crankshaft C1: Crankshaft C2: Crank arm CA: Central Axis CO: Components D1: First Rotating Body D2: Second Rotational Body D3: Connecting structural components D21: Sprocket E: Walking assistance device ED: External device H: Handle OP: Operating device PD: Pedal R1: First rotation direction R2: Second rotation direction SD: Saddle SU: shock absorber T: Transmission device TF: Front Gearbox TR: Rear transmission WF: Front wheel WR: Rear wheel

Claims

1. A wheel hub, disposed on the wheel hub of a human-powered vehicle, characterized in that it comprises: a hub axle; and a wheel hub body rotatable about the hub axle; and a rotating body rotatably connected to the wheel hub body about the hub axle; and a first electronic component, the first electronic component comprising: a sensor for detecting the posture of the human-powered vehicle; and a control device for executing: signal control of the sensor prior to detecting the posture of the human-powered vehicle, wherein the first electronic component does not rotate relative to the hub axle.

2. The wheel hub as described in claim 1, wherein the aforementioned sensor for detecting the posture of the aforementioned human-powered vehicle includes a sensor for detecting the tilt of the aforementioned human-powered vehicle.

3. The wheel hub as described in claim 1, wherein the aforementioned sensor for detecting the posture of the aforementioned human-powered vehicle includes a sensor for detecting acceleration.

4. The hub as described in any one of claims 1 to 3, wherein the aforementioned first electronic component is housed in the hub body in such a manner that it is located between the flanges in an axial direction parallel to the central axis of the hub shaft.

5. The hub described in any one of claims 1 to 3, wherein the aforementioned first electronic component is fixed to the aforementioned hub axle.

6. The hub described in any one of claims 1 to 3, wherein the aforementioned first electronic component further comprises an energy storage device.

7. The wheel hub as described in claim 6, wherein the aforementioned energy storage device includes at least one of a battery and a capacitor.

8. The hub described in any one of claims 1 to 3, wherein the hub further comprises a sensor for detecting the rotation of the aforementioned rotating body.

9. The wheel hub described in any one of claims 1 to 3, wherein the aforementioned first electronic component has an electronic substrate, and the aforementioned sensor for detecting the posture of the aforementioned human-powered vehicle is disposed on the aforementioned electronic substrate.

10. The hub as described in claim 9, wherein the aforementioned control device is disposed on the aforementioned electronic substrate.

11. The hub as described in claim 4, wherein the hub has a first cable extending along the aforementioned axial direction.

12. The wheel hub described in any one of claims 1 to 3, wherein the aforementioned first electronic component includes: a wireless communication device for wirelessly communicating with at least one of the components.

13. The wheel hub as described in claim 12, wherein the aforementioned control device performs signal control of the aforementioned wireless communication device.

14. The wheel hub described in any one of claims 1 to 3, wherein the aforementioned control device performs the control of the transmission device of the aforementioned human-powered vehicle.

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