Hub assembly for human-powered drive vehicle

Abstract

To provide a hub assembly for human-powered drive vehicle that is suitably used for a human-powered drive vehicle.SOLUTION: A hub assembly for human-powered drive vehicle comprises: a base member including a hub shaft with a central axis; a hub shell rotatably provided on the hub shaft; and a sensor which is provided on a clamp face of the base member, and detects at least one of an acceleration and an inclination. The base member is so configured as to be static with respect to a frame of a human-powered drive vehicle in an attachment state that the hub assembly is attached to the human-powered drive vehicle.SELECTED DRAWING: Figure 7

Description

[Technical Field]

[0001] The present disclosure relates to a hub assembly for a human-powered vehicle. [Background technology]

[0002] For example, Patent Document 1 discloses a hub assembly for a human-powered vehicle. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2018-43693 Summary of the Invention [Problem to be solved by the invention]

[0004] One object of the present disclosure is to provide a hub assembly for a human-powered vehicle that is suitable for use in a human-powered vehicle. [Means for solving the problem]

[0005] A hub assembly according to a first aspect of the present disclosure is a hub assembly for a human-powered vehicle, the hub assembly comprising: a base member including a hub axle having a central axis; a hub shell rotatably mounted on the hub axle; and a sensor mounted on a mounting surface of the base member for detecting at least one of acceleration and inclination, the base member being configured to be static with respect to the frame of the human-powered vehicle in an attached state in which the hub assembly is attached to the human-powered vehicle. According to the hub assembly of the first aspect, by mounting the hub assembly to a frame, a sensor that detects at least one of acceleration and tilt can be provided in a human-powered vehicle. Therefore, the hub assembly is preferably used for a human-powered vehicle. According to the hub assembly of the first aspect, the sensor is mounted on the mounting surface of the base member that is configured to be static with respect to the frame of the human-powered vehicle, so the sensor can be positioned with high precision with respect to the frame. Therefore, the hub assembly is preferably used for a human-powered vehicle.

[0006] In the hub assembly of the second aspect according to the first aspect of the present disclosure, the mounting surface extends perpendicular to the central axis of the hub axle. According to the hub assembly of the second aspect, the mounting surface extends perpendicular to the central axis of the hub axle, making it easy to position the sensor relative to the frame.

[0007] In the hub assembly of a third aspect according to the first aspect of the present disclosure, the mounting surface extends parallel to the central axis of the hub axle. According to the hub assembly of the third aspect, the mounting surface extends parallel to the central axis of the hub axle, making it easy to position the sensor relative to the frame.

[0008] In a hub assembly according to a fourth aspect of the present disclosure, the sensor has a first detection axis perpendicular to the central axis of the hub axle. According to the hub assembly of the fourth aspect, the sensor can detect at least one of acceleration and tilt about a first detection axis perpendicular to the central axis of the hub axle.

[0009] In the hub assembly of a fifth aspect according to the fourth aspect of the present disclosure, the sensor has a second detection axis perpendicular to both the central axis of the hub axle and the first detection axis. According to the hub assembly of the fifth aspect, the sensor can detect at least one of acceleration and tilt with respect to the second detection axis perpendicular to each of the central axis of the hub axle and the first detection axis.

[0010] In the hub assembly of a sixth aspect according to the fifth aspect of the present disclosure, the sensor has a third detection axis that is perpendicular to each of the first detection axis and the second detection axis and parallel to the central axis of the hub axle. According to the hub assembly of the sixth aspect, the sensor can detect at least one of acceleration and tilt about a third detection axis that is perpendicular to each of the first detection axis and the second detection axis and parallel to the central axis of the hub axle.

[0011] In the hub assembly of the seventh aspect according to any one of the first to sixth aspects of the present disclosure, the hub axle has the mounting surface. According to the hub assembly of the seventh aspect, a sensor can be provided on the mounting surface of the hub axle.

[0012] In a hub assembly of an eighth aspect according to any one of the first to seventh aspects of the present disclosure, the base member includes a support member coupled to the hub axle, the support member having the mounting surface. According to the hub assembly of the eighth aspect, the sensor can be provided on the mounting surface of the support member that is coupled to the hub axle.

[0013] In a ninth aspect of the hub assembly according to any one of the first to eighth aspects of the present disclosure, the hub axle is a hollow axle defining an interior space, and the sensor is disposed in the interior space. According to the hub assembly of the ninth aspect, the sensor can be disposed within the internal space of the hub axle, so it is less likely to interfere with the placement of members outside the internal space of the hub axle.

[0014] In a hub assembly of a tenth aspect according to the ninth aspect of the present disclosure, the base member includes a wheel mounting shaft configured to pass through the internal space of the hub axle in the mounted state, and the wheel mounting shaft has the mounting surface. According to the hub assembly of the tenth aspect, a sensor can be provided on the mounting surface of the wheel mounting shaft that is configured to pass through the internal space of the hub shaft.

[0015] In a hub assembly of an eleventh aspect according to any one of the first to tenth aspects of the present disclosure, the mounting surface is disposed radially inward of the hub shell with respect to the central axis of the hub axle. According to the hub assembly of the eleventh aspect, the mounting surface is positioned radially inward of the hub shell in relation to the central axis of the hub axle, thereby preventing the radial dimension of the hub shell from becoming too large.

[0016] A hub assembly of a twelfth side according to any one of the first to tenth sides of the present disclosure further includes a sprocket support configured to support at least one rear sprocket, wherein the mounting surface is positioned radially inward of the sprocket support with respect to the central axis of the hub axle. According to the hub assembly of the twelfth aspect, the mounting surface is positioned radially inward of the sprocket support body in relation to the central axis of the hub axle, thereby preventing the radial dimension of the hub shell from increasing. [Effects of the Invention]

[0017] The hub assembly for a human-powered vehicle of the present disclosure is preferably used in a human-powered vehicle. [Brief explanation of the drawings]

[0018] [Figure 1] 1 is a side view of a human-powered vehicle including a hub assembly for a human-powered vehicle according to an embodiment. FIG. [Figure 2] FIG. 2 is a front view of a hub assembly for the human-powered vehicle of FIG. 1. [Figure 3]FIG. 3 is an exploded perspective view of a hub assembly for the human-powered vehicle of FIG. 2. [Figure 4] FIG. 4 is a cross-sectional view taken along line D4-D4 in FIG. 2. [Figure 5] FIG. 5 is a perspective view of the holding portion of FIG. 4. [Figure 6] FIG. 6 is a perspective view of the holding portion with the cover portion omitted from FIG. 5. [Figure 7] 7 is a perspective view of the holding portion in a state where the protection member is omitted from FIG. 6. FIG. [Figure 8] FIG. 10 is a cross-sectional view of a hub assembly for a human-powered vehicle according to a first modified example. [Figure 9] FIG. 10 is a cross-sectional view of a hub assembly for a human-powered vehicle according to a second modified example. DETAILED DESCRIPTION OF THE INVENTION

[0019] <Embodiment> A hub assembly 40 for a human-powered vehicle according to an embodiment will be described with reference to FIGS. 1 to 7. The human-powered vehicle 10 is a vehicle that has at least one wheel and can be propelled at least by human power. Examples of the human-powered vehicle 10 include various types of bicycles, such as mountain bikes, road bikes, city bikes, cargo bikes, hand bikes, and recumbent bikes. The number of wheels that the human-powered vehicle 10 has is not limited. Examples of the human-powered vehicle 10 include unicycles and vehicles with three or more wheels. The human-powered vehicle 10 is not limited to vehicles that can be propelled solely by human power. The human-powered vehicle 10 also includes e-bikes that use not only human power but also the driving force of an electric motor for propulsion. E-bikes include electrically assisted bicycles whose propulsion is assisted by an electric motor. In the following embodiments, the human-powered vehicle 10 will be described as both an electrically assisted bicycle and a mountain bike.

[0020] In this specification, the following directional terms "front," "rear," "forward," "rearward," "left," "right," "sideways," "upward," and "downward," as well as any other similar directional terms, refer to those directions determined with reference to a rider facing the handlebars in a reference position on the human-powered vehicle (e.g., on a saddle or seat). The human-powered vehicle 10 includes a fore-and-aft direction X1, a lateral direction X2, and a height direction X3. The fore-and-aft direction X1 runs along the front and rear of the human-powered vehicle 10. The lateral direction X2 runs along the right and left sides of the human-powered vehicle 10. The height direction X3 runs along the top and bottom of the human-powered vehicle 10.

[0021] The human-powered vehicle 10 includes a crank 12 to which human-powered driving force is input, at least one wheel 14, and a vehicle body 16. The at least one wheel 14 includes a rear wheel 14A and a front wheel 14B. The vehicle body 16 includes a frame 18. The crank 12 includes a crankshaft 20 that is rotatable relative to the frame 18, a first crank arm 22A provided at a first axial end of the crankshaft 20, and a second crank arm 22B provided at a second axial end of the crankshaft 20. A first pedal 24A is connected to the first crank arm 22A. A second pedal 24B is connected to the second crank arm 22B.

[0022] The human-powered vehicle 10 further includes a front sprocket 26 connected to the crankshaft 20. The crankshaft 20 and the front sprocket 26 may be connected so as not to rotate relative to each other, or may be connected via a first one-way clutch. The first one-way clutch is configured to rotate the front sprocket 26 forward when the crank 12 rotates forward, and to allow relative rotation between the crank 12 and the front sprocket 26 when the crank 12 rotates backward. The human-powered vehicle 10 further includes a rear sprocket 28 and a chain 30. The chain 30 transmits the rotational force of the front sprocket 26 to the rear sprocket 28.

[0023] The rear sprocket 28 is connected to the rear wheel 14A. A second one-way clutch is preferably provided between the rear sprocket 28 and the rear wheel 14A. The second one-way clutch is configured to rotate the rear wheel 14A forward when the rear sprocket 28 rotates forward, and to allow relative rotation between the rear sprocket 28 and the rear wheel 14A when the rear sprocket 28 rotates backward.

[0024] The human-powered vehicle 10 may be equipped with a pulley or a bevel gear instead of the front sprocket 26. The human-powered vehicle 10 may be equipped with a pulley or a bevel gear instead of the rear sprocket 28. The human-powered vehicle 10 may be equipped with a belt or a shaft instead of the chain 30. The front sprocket 26, the rear sprocket 28, and the chain 30 can be modified as appropriate as long as they are configured to transmit the human-powered driving force input to the crank 12 to the drive wheels.

[0025] For example, the human-powered vehicle 10 further includes a transmission 32. The transmission 32 is provided in the transmission path of the human-powered driving force in the human-powered vehicle 10 and is configured to change the gear ratio. The transmission 32 has multiple gear stages. The gear ratios corresponding to each gear stage are different from each other. The number of gear stages ranges, for example, from 3 to 30. The gear ratio is the ratio of the rotational speed of the drive wheels to the rotational speed of the crankshaft 20. In this embodiment, the drive wheels are the rear wheels 14A.

[0026] The transmission 32 may be configured to be operated by an actuator. The actuator may include an electric actuator. The actuator may include, for example, an electric motor. For example, the transmission ratio may be expressed by dividing the rotational speed of the drive wheels by the rotational speed of the crankshaft 20.

[0027] For example, the transmission 32 includes a rear derailleur. Instead of or in addition to the rear derailleur, the transmission 32 may include at least one of a front derailleur and an internal gear shifter.

[0028] The human-powered vehicle 10 includes a hub assembly 40 for the human-powered vehicle. For example, the hub assembly 40 is mounted on the rear wheel 14A. The hub assembly 40 includes a base member 42, a hub shell 44, and a sensor 46. The base member 42 includes a hub axle 48 having a central axis C. The hub shell 44 is rotatably mounted on the hub axle 48. The base member 42 is configured to be static with respect to the frame 18 of the human-powered vehicle 10 in an attached state in which the hub assembly 40 is attached to the human-powered vehicle 10. For example, the central axis C of the hub axle 48 is parallel to the lateral direction X2 of the human-powered vehicle 10.

[0029] For example, the base member 42 is attached to the frame 18 so that movement relative to the frame 18 of the human-powered vehicle 10 is restricted in the attached state, thereby making the base member 42 static relative to the frame 18 of the human-powered vehicle 10 in the attached state. For example, the base member 42 is attached to the frame 18 so that movement relative to the frame 18 of the human-powered vehicle 10 is restricted in the attached state, thereby making the base member 42 static relative to the frame 18 of the human-powered vehicle 10 in the attached state.

[0030] For example, the hub assembly 40 further includes a sprocket support 50 configured to support at least one rear sprocket 28. For example, the sprocket support 50 is configured to rotate integrally with the rear sprocket 28. For example, the sprocket support 50 is connected to the hub shell 44. For example, the hub assembly 40 further includes a transition portion 52 disposed between the sprocket support 50 and the hub shell 44. For example, the transition portion 52 is configured to transmit rotation of the sprocket support 50 to the hub shell 44 and not transmit rotation of the hub shell 44 to the sprocket support 50. An internal transmission may be provided between the sprocket support 50 and the hub shell 44.

[0031] For example, the hub axle 48 includes a first end 48A and a second end 48B in a direction parallel to a central axis C of the hub axle 48. For example, the hub axle 48 is a hollow axle that defines an interior space 48S. The hub axle 48 may be made up of multiple members.

[0032] For example, the base member 42 includes a wheel mounting shaft 42H that is configured to pass through the internal space 48S of the hub axle 48 in an attached state. For example, the wheel mounting shaft 42H is configured to attach the hub assembly 40 to the frame 18. For example, the wheel mounting shaft 42H is configured to attach the hub assembly 40 to the frame 18 by tightening the hub axle 48 and the frame 18 together by operating a lever provided at an end of the wheel mounting shaft 42H in a direction parallel to the central axis C of the hub axle 48.

[0033] For example, the wheel mounting axle 42H is configured to attach the hub assembly 40 to the frame 18 by inserting the wheel mounting axle 42H into the hole and the internal space 48S of the frame 18 with the hub axle 48 of the hub assembly 40 aligned with the hole in the frame 18. The wheel mounting axle 42H is configured to attach the hub assembly 40 to the frame 18 by fitting the hub axle 48 of the hub assembly 40 into a recess in the frame 18 with the wheel mounting axle 42H positioned to pass through the internal space 48S.

[0034] For example, the sprocket support 50 is provided on the first end 48A of the hub axle 48. For example, the sprocket support 50 is formed in a cylindrical shape. For example, the outer periphery of the sprocket support 50 is provided with at least one of a protrusion and a recess that can engage with the rear sprocket 28. For example, the sprocket support 50 engages with the rear sprocket 28 through spline engagement.

[0035] For example, the hub shell 44 includes a first end 44A and a second end 44B in a direction parallel to the central axis C of the hub axle 48. The hub shell 44 has an internal space 44S. For example, the outer periphery of the hub shell 44 is provided with spoke engagement portions 44C that are capable of engaging with spokes. For example, the spoke engagement portions 44C are provided on a flange of the hub shell 44. For example, a transition portion 52 connects the first end 44A of the hub shell 44 and the sprocket support 50.

[0036] For example, the hub shell 44 includes a body 54 and a lid 56 attached to the body 54. The body 54 includes a second end 44B and a spoke engaging portion 44C. The lid 56 includes a first end 44A.

[0037] For example, the hub assembly 40 further includes a power generating unit 58. For example, the power generating unit 58 includes a dynamo. For example, the power generating unit 58 is housed in the internal space 44S. For example, the power generating unit 58 is provided on the second end 44B side of the internal space 44S.

[0038] For example, the hub assembly 40 further includes a retaining portion 60. For example, the retaining portion 60 is disposed in the internal space 44S. For example, the retaining portion 60 is attached to the hub axle 48 so as to be non-rotatable relative to the hub axle 48. For example, the retaining portion 60 is attached closer to the first end 44A of the hub shell 44 than the power generation unit 58 in a direction parallel to the central axis C of the hub axle 48. The retaining portion 60 has a retaining space 60S.

[0039] As shown in FIGS. 4 to 7 , for example, the holding portion 60 is formed with a through-hole 60A through which the hub axle 48 passes. For example, the holding portion 60 includes a housing portion 60B and a cover portion 60C. For example, the housing portion 60B includes a resin material. For example, the cover portion 60C includes a resin material. A holding space 60S is formed by attaching the cover portion 60C to the housing portion 60B. For example, the holding portion 60 further includes a protective member 60D. For example, the protective member 60D is configured to cover at least a portion of the electronic component 62 mounted on the substrate 64.

[0040] For example, the hub assembly 40 further includes an electronic component 62. At least a portion of the electronic component 62 is housed in the holding space 60S. For example, the electronic component 62 includes a control unit 62A. The control unit 62A includes an arithmetic processing unit that executes a predetermined control program. The arithmetic processing unit included in the control unit 62A includes, for example, a CPU (Central Processing Unit) or an MPU (Micro Processing Unit). The arithmetic processing units included in the control unit 62A may be provided in multiple locations that are separate from each other. When the arithmetic processing units are provided in multiple locations that are separate from each other, the respective parts of the arithmetic processing units are connected to each other so that they can communicate with each other. The control unit 62A may include one or more microcomputers.

[0041] Preferably, the control unit 62A includes a storage unit. The storage unit stores a control program and information used in the control process. The storage unit includes, for example, a nonvolatile memory and a volatile memory. The nonvolatile memory includes, for example, at least one of a read-only memory (ROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), and a flash memory. The volatile memory includes, for example, a random access memory (RAM).

[0042] For example, the electronic component 62 includes a power source 62B. For example, the power source 62B may be configured to be able to be charged with electricity generated by the power generation unit 58. For example, the power source 62B is configured to supply power to the control unit 62A. For example, the power source 62B is housed in the holding space 60S of the holding unit 60.

[0043] For example, the hub assembly 40 further includes a substrate 64. For example, the control unit 62A is mounted on the substrate 64. For example, the substrate 64 is housed in the holding space 60S of the holding portion 60. For example, the substrate 64 is attached to the holding portion 60 so as to be immovable relative to the holding portion 60. For example, the substrate 64 extends perpendicular to the central axis C of the hub axle 48.

[0044] The sensor 46 detects at least one of acceleration and tilt. For example, the sensor 46 has a detection axis P. For example, the sensor 46 is an inertial sensor that detects an inertial parameter related to the detection axis P. When the sensor 46 detects both acceleration and tilt, the sensor 46 may have a detection axis P for detecting acceleration and a detection axis P for detecting tilt.

[0045] For example, when the sensor 46 detects acceleration, the sensor 46 includes an acceleration sensor that detects acceleration in a direction along the detection axis P. For example, when the sensor 46 detects tilt, the sensor 46 includes an inclination sensor that detects an angular change about the detection axis P. For example, when the sensor 46 detects tilt, the sensor 46 may include a gyro sensor.

[0046] For example, the sensor 46 has a first detection axis P1 that is perpendicular to the central axis C of the hub axle 48. For example, the sensor 46 has a second detection axis P2 that is perpendicular to both the central axis C of the hub axle 48 and the first detection axis P1. For example, the sensor 46 has a third detection axis P3 that is perpendicular to both the first detection axis P1 and the second detection axis P2 and parallel to the central axis C of the hub axle 48. The first detection axis P1, the second detection axis P2, and the third detection axis P3 each correspond to the detection axis P. For example, the first detection axis P1 is parallel to the fore-and-aft direction X1 of the human-powered vehicle 10. For example, the second detection axis P2 is parallel to the lateral direction X2 of the human-powered vehicle 10. For example, the third detection axis P3 is parallel to the height direction X3 of the human-powered vehicle 10.

[0047] For example, the sensor 46 has all of the first detection axis P1, the second detection axis P2, and the third detection axis P3. The sensor 46 may have at least one of the first detection axis P1, the second detection axis P2, and the third detection axis P3. The sensor 46 may have one or more detection axes P different from any of the first detection axis P1, the second detection axis P2, and the third detection axis P3, instead of or in addition to at least one of the first detection axis P1, the second detection axis P2, and the third detection axis P3. The number and directions of the detection axes P of the sensor 46 can be changed as appropriate.

[0048] For example, sensor 46 is an inertial sensor. When sensor 46 detects both acceleration and tilt, sensor 46 may have a first detection axis P1, a second detection axis P2, and a third detection axis P3 for detecting acceleration, and a first detection axis P1, a second detection axis P2, and a third detection axis P3 for detecting tilt.

[0049] When the sensor 46 detects inclination, for example, the first detection axis P1 is a detection axis P for detecting the roll angle of the human-powered vehicle 10. When the sensor 46 detects inclination, for example, the second detection axis P2 is a detection axis P for detecting the pitch angle of the human-powered vehicle 10. When the sensor 46 detects inclination, for example, the third detection axis P3 is a detection axis P for detecting the yaw angle of the human-powered vehicle 10.

[0050] When the sensor 46 detects the pitch angle of the human-powered vehicle 10, the sensor 46 may be configured to correct the roll angle detected using the first detection axis P1 with the pitch angle detected using the second detection axis P2 and the yaw angle detected using the third detection axis P3. When the sensor 46 includes an acceleration sensor and an inclination sensor, the sensor 46 may be configured to correct the angle detected by the inclination sensor with the acceleration detected by the acceleration sensor.

[0051] The sensor 46 is provided on the mounting surface 42A of the base member 42. For example, the mounting surface 42A is positioned radially inward of the hub shell 44 with respect to the central axis C of the hub axle 48. For example, the mounting surface 42A is positioned radially inward of the radially innermost portion of the hub shell 44 in a cross section that includes the mounting surface 42A and is radially perpendicular to the central axis C of the hub axle 48. For example, the mounting surface 42A is positioned in the internal space 44S of the hub shell 44. For example, the mounting surface 42A is positioned radially inward of the sprocket support 50 with respect to the central axis C of the hub axle 48. For example, the mounting surface 42A is positioned radially outward of the outer circumferential surface of the hub axle 48 with respect to the central axis C of the hub axle 48.

[0052] For example, the sensor 46 is indirectly or directly mounted on the hub axle 48. For example, the base member 42 includes a support member 66 coupled to the hub axle 48, and the support member 66 has a mounting surface 42A. In this embodiment, the sensor 46 is indirectly mounted on the hub axle 48. In this embodiment, the sensor 46 is mounted on the board 64 by being mounted on the board 64. In this embodiment, the support member 66 corresponds to the board 64. In this embodiment, the mounting surface 42A corresponds to the portion of the mounting surface of the board 64 on which the sensor 46 is mounted. The mounting surface 42A in this embodiment extends parallel to the central axis C of the hub axle 48. For example, the mounting surface 42A extends parallel to the front-to-rear direction X1, parallel to the lateral direction X2, and perpendicular to the height direction X3.

[0053] For example, the hub assembly 40 is configured so that the support member 66 can be positioned in each of the front-to-rear direction X1, the lateral direction X2, and the height direction X3. For example, the substrate 64 is configured so that movement of the retaining portion 60 within the retaining space 60S is restricted. For example, the phase of the retaining portion 60 in the circumferential direction of the central axis C of the hub axle 48 is determined by a positioning mechanism. The positioning mechanism includes, for example, at least one of a recessed portion, a protruding portion, and a flat portion provided on the outer periphery of the hub axle 48.

[0054] For example, the detection results of the sensor 46 are input to the control unit 62A. For example, the control unit 62A is configured to control the transmission 32 in accordance with the output of the sensor 46. If the sensor 46 detects acceleration, for example, the control unit 62A may be configured to control the transmission 32 to change the gear ratio in accordance with the acceleration. If the sensor 46 detects inclination, for example, the control unit 62A may be configured to control the transmission 32 to change the gear ratio in accordance with at least one of the pitch angle, roll angle, and yaw angle of the human-powered vehicle 10. The detection results of the sensor 46 may be configured to be transmitted to an external device. For example, the external device may include at least one of the components of the human-powered vehicle 10, a smartphone, and a personal computer. For example, the components of the human-powered vehicle 10 may include at least one of a drive unit including an assist motor that provides propulsive force to the human-powered vehicle 10, a cycle computer, an electric suspension device, an electric brake device, and an electric adjustable seat post.

[0055] <Example of change> The descriptions of the embodiments are merely examples of possible forms of a hub assembly for a human-powered vehicle according to the present disclosure, and are not intended to limit the forms. A hub assembly for a human-powered vehicle according to the present disclosure can take the following modified examples, or a combination of at least two mutually consistent modified examples. In the following modified examples, parts that are common to the embodiment will be assigned the same reference numerals as in the embodiment, and descriptions thereof will be omitted.

[0056] As shown in Fig. 8, the wheel mounting shaft 42H may have a mounting surface 42A. For example, the mounting surface 42A is provided on the outer circumferential surface of the wheel mounting shaft 42H. In Fig. 8, the sensor 46 is disposed in the internal space 48S.

[0057] As shown in Figure 9, the hub axle 48 may have a mounting surface 42A. For example, the mounting surface 42A is provided on the inner circumferential surface that defines an internal space 48S of the hub axle 48. In Figure 9, the sensor 46 is disposed in the internal space 48S.

[0058] The mounting surface 42A may extend perpendicular to the central axis C of the hub axle 48. For example, FIGS. 8 and 9 each show an example in which the mounting surface 42A extends perpendicular to the central axis C of the hub axle 48. When the mounting surface 42A extends perpendicular to the central axis C of the hub axle 48, for example, the mounting surface 42A extends perpendicular to the front-to-rear direction X1, parallel to the lateral direction X2, and parallel to the height direction X3. When the mounting surface 42A extends perpendicular to the central axis C of the hub axle 48, the mounting surface 42A may extend parallel to the front-to-rear direction X1, perpendicular to the lateral direction X2, and parallel to the height direction X3. When the mounting surface 42A is provided on a substrate 64, changing the orientation of the substrate 64 causes the mounting surface 42A to extend perpendicular to the central axis C of the hub axle 48.

[0059] The phrase "at least one" as used herein means "one or more" of the desired options. As an example, the phrase "at least one" as used herein means "only one option" or "both of two options" when the number of options is two. As another example, the phrase "at least one" as used herein means "only one option" or "any combination of two or more options" when the number of options is three or more. [Explanation of symbols]

[0060] 10...human-powered vehicle, 18...frame, 28...rear sprocket, 40...hub assembly, 42...base member, 42A...mounting surface, 42H...wheel mounting shaft, 44...hub shell, 46...sensor, 48...hub shaft, 48S...internal space, 50...sprocket support, 66...support member.

Claims

1. 1. A hub assembly for a human-powered vehicle, comprising: The hub assembly includes a base member including a hub axle having a central axis; a hub shell rotatably mounted on the hub axle; a sensor provided on the mounting surface of the base member for detecting at least one of acceleration and tilt; A hub assembly, wherein the base member is configured to be static with respect to a frame of the human-powered vehicle in an attached state in which the hub assembly is attached to the human-powered vehicle.

2. The hub assembly of claim 1 , wherein the mounting surface extends perpendicular to the central axis of the hub axle.

3. The hub assembly according to claim 1 , wherein the mounting surface extends parallel to the central axis of the hub axle.

4. The hub assembly of claim 1 , wherein the sensor has a first detection axis perpendicular to the central axis of the hub axle.

5. The hub assembly of claim 4 , wherein the sensor has a second sensing axis perpendicular to each of the central axis of the hub axle and the first sensing axis.

6. 6. The hub assembly of claim 5, wherein the sensor has a third sensing axis perpendicular to each of the first and second sensing axes and parallel to the central axis of the hub axle.

7. The hub assembly according to claim 1 , wherein the hub axle includes the mounting surface.

8. the base member includes a support member coupled to the hub axle; The hub assembly of claim 1 , wherein the support member has the mounting surface.

9. the hub axle is a hollow axle defining an interior space; The hub assembly of claim 1 , wherein the sensor is disposed in the interior space.

10. the base member includes a wheel mounting shaft configured to pass through the internal space of the hub axle in the mounted state, The hub assembly of claim 9 , wherein the wheel mounting axis includes the mounting surface.

11. The hub assembly according to claim 1 , wherein the mounting surface is positioned radially inward of the hub shell with respect to the central axis of the hub axle.

12. further comprising a sprocket support configured to support at least one rear sprocket; The hub assembly according to claim 1 , wherein the mounting surface is positioned radially inward of the sprocket support with respect to the central axis of the hub axle.

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