JP2019086471A - Rotation sensing device and braking device having the same - Google Patents

Abstract

A rotation detection device capable of reducing the number of parts and a braking device including the rotation detection device are provided. A rotation detecting device detects a rotation of a rotating body attached to a vehicle based on a change in an electrical state accompanying the rotation of the rotating body, and a detection result of the detecting section. And a control unit 54 that acquires information on the rotation of the rotating body RT based on the above. [Selection] Figure 2

Description

  The present invention relates to a rotation detection device and a braking device provided with the same.

  A rotation detection device is known that acquires information on the rotation of a rotating body mounted on a vehicle. The conventional rotation detection device includes a detection unit, a detection target unit provided on the rotation body, and a control unit that acquires information on the rotation of the rotation body based on the detection result of the detection unit. An example of the detection unit is a magnetic sensor. An example of a to-be-detected part is a magnet. The detection unit responds to the magnet by rotation of the rotating body, and outputs a signal in which information on rotation of the rotating body is reflected to the control unit. The control unit acquires, for example, the traveling speed of the vehicle as information related to the rotation of the rotating body, based on the information obtained from the detection unit. Patent Document 1 discloses an example of a conventional rotation detection device.

Unexamined-Japanese-Patent No. 2017-30395

It is desirable to reduce the number of parts of the rotation detection device.
An object of the present invention is to provide a rotation detection device capable of reducing the number of parts and a braking device provided with the same.

A rotation detection device according to a first aspect of the present invention detects a rotation of a rotating body attached to a vehicle based on a change in an electrical state accompanying the rotation of the rotating body, and a detection result of the detection portion And a controller for acquiring information on the rotation of the rotating body based on
Since the rotating body of the vehicle is applied as the detected portion corresponding to the detecting portion, the number of parts of the rotation detecting device can be reduced. Further, the rotating body detection unit can contribute to weight reduction, and the manufacturability is improved.

In the second side surface rotation detection device according to the first side surface, the rotating body includes a plurality of insulating portions disposed in the circumferential direction of the rotating body, and a conductor portion disposed between the plurality of insulating portions. The detection unit is configured to intermittently detect the conductor portion as the rotating body rotates.
Therefore, detection accuracy by the detection unit is improved.

In the rotation detection device of the third aspect according to the second aspect, the detection unit detects a change in impedance associated with rotation of the rotating body.
Since an inductive proximity sensor can be adopted as the detection unit, detection accuracy by the detection unit is improved.

In the rotation detection device of the fourth side according to the second aspect, the detection unit detects a change in capacitance between the rotating body and the detection unit as the rotating body rotates.
Since a capacitive proximity sensor can be adopted as the detection unit, the degree of freedom in selection of the material of the rotating body is improved.

In the rotation detection device of the fifth aspect according to any one of the second to fourth aspects, the rotating body includes a disk brake rotor.
Therefore, information on the rotation of the disc brake rotor can be acquired.

In the rotation detection device of the sixth aspect according to the fifth aspect, the disc brake rotor has an inner portion attached to a wheel of the vehicle, and an outer portion disposed radially outward of the disc brake rotor with respect to the inner portion. A portion, and the insulating portion is disposed at the outer portion.
Therefore, information on the rotation of the disc brake rotor can be acquired.

In the seventh side surface rotation detection device according to the sixth side surface, the outer side portion includes an outer peripheral portion, and the insulating portion includes at least one opening provided in the outer peripheral portion to penetrate the outer side portion.
Information on the rotation of the disc brake rotor can be acquired using the opening provided in the outer peripheral part, so the number of parts of the rotation detection device can be reduced.

In the rotation detection device according to an eighth aspect according to the sixth aspect, the outer portion includes an outer peripheral portion, and a plurality of connecting portions connecting the outer peripheral portion and the inner portion, and the insulating portion includes the plurality of connecting portions. It includes at least one opening provided between the couplings.
Information on the rotation of the disc brake rotor can be obtained using the openings provided between the plurality of connecting portions, so the number of parts of the rotation detection device can be reduced.

The rotation detection apparatus according to any one of the first to fourth aspects, wherein the rotating body includes a hub of a hub assembly supporting a wheel of the vehicle.
Therefore, information on the rotation of the hub body can be obtained.

In the rotation detection device of the tenth side according to any one of the first to fourth side surfaces, the rotating body includes a fixture for fixing a disc brake rotor of the vehicle to a hub assembly of the vehicle.
Therefore, it is possible to obtain information on the rotation of the fixture.

In the rotation detection device of the eleventh side according to any one of the first to tenth side surfaces, the detection unit is arranged to be separated from the rotating body.
Therefore, the resistance to the rotating body due to the contact with the detection unit can be reduced.

In the rotation detection device of the twelfth aspect according to any one of the first to eleventh aspects, the information regarding the rotation of the rotating body includes an angular velocity of the rotating body, and the control unit is based on the angular velocity The traveling speed of the vehicle is acquired.
Therefore, the rotation detection device can be used as a vehicle speed sensor.

The rotation detection device of the thirteenth aspect according to any one of the first to twelfth aspects further includes a sensor housing that accommodates at least the detection unit.
Since the detection unit can be protected from foreign matter such as dust and moisture, the durability of the detection unit is improved.

In the rotation detection device according to the fourteenth aspect, the sensor housing is at least partially made of a non-metallic material.
For this reason, the influence on the detection accuracy by the detection unit is reduced, which can contribute to the weight reduction of the sensor housing.

In the rotation detection device of the fifteenth side according to the thirteenth or fourteenth aspect, the sensor housing includes a mounting portion, and the mounting portion is mounted on an outer surface of a braking device of the vehicle.
For this reason, the rotation detection device can be suitably attached to the outer surface of the braking device.

The rotation detection device according to the sixteenth side according to the thirteenth or fourteenth aspect, wherein the sensor housing includes a mounting portion, and the mounting portion is mounted to a main body of the vehicle.
For this reason, the rotation detection device can be suitably attached to the body of the vehicle.

The rotation detection device of the seventeenth side according to any one of the first to sixteenth sides, wherein the vehicle is a bicycle.
Therefore, the rotation detection device can be applied to a bicycle.

According to an eighteenth aspect of the present invention, there is provided a braking system comprising a rotation detecting device relating to any one of the fifth to eighth side surfaces, a braking portion for braking the disk brake rotor, and the braking portion. And a friction member in contact with the disc brake rotor disposed in the slit portion.
Since the number of parts of the rotation detection device can be reduced, the number of parts of the braking device on which the rotation detection device is mounted can also be reduced. Moreover, the said damping device can contribute to weight reduction, and manufacturability improves.

In the braking device of the nineteenth side according to the eighteenth side, the rotation detection device further includes a sensor housing that accommodates at least the detection unit, and the sensor housing is at least partially made of a nonmetallic material.
Since the detection unit can be protected from foreign matter such as dust and moisture, the durability of the detection unit is improved. In addition, the influence of the detection unit on the detection accuracy is reduced, which can contribute to weight reduction of the sensor housing.

In the braking apparatus of the twentieth side according to the eighteenth aspect, the braking apparatus further includes a brake housing that accommodates the braking portion and the rotation detection device, and the brake housing is at least partially made of a nonmetallic material.
Since the detection unit can be protected from foreign matter such as dust and moisture, the durability of the detection unit is improved. In addition, the influence of the detection unit on the detection accuracy is reduced, which can contribute to weight reduction of the brake housing.

  According to the rotation detection device of the present invention and the braking device including the same, the number of parts can be reduced.

BRIEF DESCRIPTION OF THE DRAWINGS The side view of the vehicle containing the rotation detection apparatus of 1st Embodiment. FIG. 2 is a partial side view of a vehicle showing the braking device of FIG. 1 and the periphery thereof. The schematic diagram which shows the damping device of FIG. 2, and the cross section of a rotary body. FIG. 3 is a block diagram showing a connection relationship between the rotation detection device of FIG. 2 and various elements. The partial side view of the vehicle containing the rotation detection apparatus of 2nd Embodiment. The partial side view of the vehicle containing the rotation detection apparatus of 3rd Embodiment. The partial side view of the vehicle containing the rotation detection apparatus of 4th Embodiment. The schematic diagram which shows the damping device of 5th Embodiment, and the cross section of a rotary body. The schematic diagram which shows the damping device of 6th Embodiment, and the cross section of a rotary body.

First Embodiment
The vehicle 10 including the rotation detection device 50 will be described with reference to FIGS. 1 to 4.
FIG. 1 shows a side view of a vehicle 10 including a rotation detection device 50. The vehicle 10 includes a vehicle that uses human power at least partially and a vehicle that uses only non-human motive power with respect to the motive power for traveling. Motives other than human power include internal combustion engines. In one example, the vehicle 10 is a bicycle. The type of vehicle 10 illustrated is a city cycle. Vehicle 10 further includes a body 12, a wheel W, and a drive train DT. Body 12 includes a frame 14, a front fork 16 and a handle 18. Wheel W includes a front wheel WF and a rear wheel WR. The front wheel WF includes a hub assembly HAF. The rear wheel WR includes a hub assembly HAR.

  The drive train DT includes a crank assembly FCW, a front sprocket FS, a rear sprocket RS, and a chain CN. The crank assembly FCW includes a pair of crank arms FCA and a pair of pedals PD. The pair of pedals PD is rotatably attached to the tip of each of the pair of crank arms FCA.

  A front sprocket FS is provided on the crank assembly FCW. The rear sprocket RS is provided on the hub assembly HAR of the rear wheel WR. In one example, the chain CN is wound around the front sprocket FS and the rear sprocket RS. The driving force applied to the pedal PD by the occupant of the vehicle 10 is transmitted to the rear wheel WR via the front sprocket FS, the chain CN, and the rear sprocket RS.

  Vehicle 10 further includes an electric drive assist device 20. The electric drive assist device 20 operates such that the propulsive force of the vehicle 10 is assisted. The electric drive assist device 20 operates, for example, according to the driving force applied to the pedal PD. The electric drive assist device 20 includes an electric motor 22. The electric drive assist device 20 is driven by the power supplied from the battery 24 mounted on the vehicle 10. In the present embodiment, the battery 24 is provided on the outer surface of the frame 14. The battery 24 supplies power to a control device 30, an operation device 32, an informing device 34, braking devices 40 and 140, and rotation detection devices 50 and 150, which will be described later. That is, the control device 30, the operation device 32, the notification device 34, the braking devices 40 and 140, and the rotation detection devices 50 and 150 are connected by electrical wiring so as to be capable of wired communication. Note that the electric drive assist device 20 may be omitted from the vehicle 10. Also, at least a part of the battery 24 may be disposed in the internal space of the frame 14.

  Vehicle 10 further includes a control device 30. Control device 30 controls braking devices 40 and 140 described later. Specifically, control device 30 controls at least one of an electric motor (not shown) and a hydraulic mechanism (not shown) included in braking portions 42 and 142 of braking devices 40 and 140 described later.

  Vehicle 10 further includes an operating device 32. The operating device 32 is provided, for example, on the handle 18. When an operation from a passenger of the vehicle 10 is input, the operation device 32 transmits an operation signal corresponding to the operation to the control device 30. Control device 30 controls braking devices 40 and 140 described later according to an operation signal from operation device 32. Vehicle 10 further includes an informing device 34. The notification device 34 is provided, for example, on the handle 18. The notification device 34 includes at least one of a cycle computer, a smartphone, a speaker, an LED, a vibration generating device, and a display device.

  Vehicle 10 further includes a braking device 40. The braking device 40 is, for example, a disk brake device. The braking device 40 is attached to the front fork 16. The braking device 40 includes a braking unit 42 that brakes a disk brake rotor 60 described later. The braking device 40 further includes a brake housing 44 that houses the braking portion 42. The braking unit 42 includes, for example, a piston (not shown) that operates in response to the operation of the operating device 32.

  Vehicle 10 further includes a rotation detection device 50. The rotation detection device 50 includes a detection unit 52 (see FIG. 2) that detects the rotation of the rotating body RT attached to the vehicle 10 based on the change in the electrical state accompanying the rotation of the rotating body RT. The detection unit 52 detects a change in impedance accompanying the rotation of the rotating body RT. In the present embodiment, an inductive proximity sensor capable of detecting a metal material is employed as the detection unit 52. The detection unit 52 is disposed to be separated from the rotating body RT (see FIG. 3). The detection unit 52 is provided on the braking device 40 or the main body 12 of the vehicle 10. The rotation detection device 50 may be included in an element of the braking device 40. In the present embodiment, the braking device 40 further includes a rotation detection device 50.

  Vehicle 10 further includes a disk brake rotor 60. The disk brake rotor 60 is provided on the hub assembly HAF of the front wheel WF, and rotates about the central axis CA. The disc brake rotor 60 is at least partially made of a metal material. In the present embodiment, the rotating body RT includes a disk brake rotor 60.

  FIG. 2 shows the configuration of the braking device 40 and its periphery in a left side view of the vehicle 10. As shown in FIG. The rotation detection device 50 further includes a sensor housing 56 accommodating at least the detection unit 52. The sensor housing 56 is configured such that the detection unit 52 can appropriately detect the detection target. In one example, the sensor housing 56 is made of a material that does not easily affect the change in impedance detected by the detection unit 52 as the rotating body RT rotates. The sensor housing 56 is at least partially made of a nonmetallic material. In one example, sensor housing 56 is comprised entirely of non-metallic material. Sensor housing 56 includes mounting portion 56A. The mounting portion 56A is mounted to the outer surface 46 of the brake housing 44 of the braking device 40 of the vehicle 10. The outer surface 46 is a surface opposite to the first outer surface 46A and the first outer surface 46A, and includes a second outer surface 46B (see FIG. 3) facing the disc brake rotor 60. In the present embodiment, the attachment portion 56 </ b> A is attached to the first outer surface 46 </ b> A of the outer surface 46 of the brake housing 44. In one example, the attachment portion 56A is bonded, welded, or welded so that the detection portion 52 and the disc brake rotor 60 face each other in the direction along the central axis CA of the disc brake rotor 60. It is attached to the first outer surface 46A of the brake housing 44. The attachment portion 56A may be attached to the first outer surface 46A of the brake housing 44 of the braking device 40 by a bolt (not shown) or the like.

  The rotating body RT includes a plurality of insulating portions RT1 disposed in the circumferential direction of the rotating body RT, and a conductor portion RT2 disposed between the plurality of insulating portions RT1. The insulating portion RT1 does not contain a metal material. In one example, the insulating portion RT1 is made of at least one of a nonmetallic material and an opening. The opening is a generic term for through holes, spaces, and grooves. The conductor portion RT2 is made of a metal material. The detection unit 52 is configured to intermittently detect the conductor portion RT2 as the rotating body RT rotates. In one example, the detection unit 52 reacts to the conductor portion RT2 and does not react to the insulating portion RT1. Specifically, when the conductor portion RT2 approaches with the rotation of the rotating body RT, the detection unit 52 detects a change in impedance due to the electromagnetic induction. The detection unit 52 can alternately detect the insulating portion RT1 and the conductor portion RT2 as a detection target by a change in impedance accompanying the rotation of the rotating body RT.

  Disc brake rotor 60 includes an inner portion 62 attached to wheel W of vehicle 10 and an outer portion 64 disposed radially outward of disc brake rotor 60 with respect to inner portion 62. The outer side portion 64 includes an outer peripheral portion 66 and a plurality of connecting portions 68 connecting the outer peripheral portion 66 and the inner side portion 62. The shape of the outer peripheral portion 66 is substantially annular. The outer peripheral portion 66 and the connecting portion 68 are made of a metal material. An example of the number of connection parts 68 is six. At least two of the inner portion 62, the connecting portion 68, and the outer peripheral portion 66 connected to each other may be integrally provided.

  The insulating portion RT1 is disposed in the outer portion 64. The insulating portion RT1 includes at least one opening 70 provided in the outer peripheral portion 66 so as to penetrate the outer side portion 64. Conductor portion RT2 includes a braking surface 72 provided on outer peripheral portion 66. The braking surface 72 includes a portion other than the opening 70 of the outer peripheral portion 66. The opening 70 penetrates the outer peripheral portion 66 in the direction along the center axis CA of the disc brake rotor 60. The plurality of openings 70 are openings for radiating heat generated in the outer peripheral portion 66 due to, for example, the contact between the friction member 48 of the braking device 40 and the outer peripheral portion 66 of the disk brake rotor 60, an opening for improving design. And an opening provided as a detection target of the detection unit 52. The plurality of openings 70 are arranged in the circumferential direction of the disc brake rotor 60 at predetermined intervals set in advance. The plurality of openings 70 may be arranged at equal intervals in the circumferential direction of the disk brake rotor 60. The number of pulses for detecting the detection target by the detection unit 52 is preferably in the range of 30 to 50. In other words, the number of openings 70 is preferably in the range of 30 to 50. In one example, the number of openings 70 is thirty six.

  The disc brake rotor 60 is attached to the front wheel WF by, for example, a fixture 80. The fixture 80 is at least partially made of a metal material. The fixture 80 includes a lock ring 82. The lock ring 82 includes a serration 82A. In one example, the disc brake rotor 60 is secured to the hub assembly HAF by attaching the fastener 80 to the hub assembly HAF using a predetermined tool (not shown) that engages the serrations 82A.

  As shown in FIG. 3, the braking device 40 is provided in the braking portion 42, and a slit portion SL in which the disk brake rotor 60 is accommodated, and a friction member 48 in contact with the disk brake rotor 60 disposed in the slit portion SL. And further comprising The number of friction members 48 is, for example, two. The friction member 48 is provided so as to be able to sandwich the outer peripheral portion 66 of the disc brake rotor 60 by the operation of the braking portion 42.

  FIG. 4 shows the connection between the rotation detection device 50 and the various elements that make up the vehicle 10. The rotation detection device 50 further includes a control unit 54 that acquires information on the rotation of the rotating body RT based on the detection result of the detection unit 52. The information on the rotation of the rotating body RT includes the angular velocity of the rotating body RT. The control unit 54 is housed, for example, in the sensor housing 56. The control unit 54 acquires the traveling speed of the vehicle 10 based on the angular velocity of the rotating body RT.

  Specifically, the control unit 54 acquires the number of times of detection of the detection target per unit time based on the detection result of the detection unit 52, and calculates the angular velocity of the rotating body RT based on the acquired number of times of detection. In the present embodiment, the control unit 54 calculates the angular velocity of the disk brake rotor 60. Control unit 54 calculates the traveling speed of vehicle 10 based on the angular velocity of rotating body RT and the diameter of front wheel WF. Thus, the control unit 54 can acquire the traveling speed based on the detection result of the detection unit 52. In one example, the control device 30 causes the notification device 34 mounted on the vehicle 10 to output the information on the traveling speed acquired from the control unit 54.

  Vehicle 10 further includes a braking device 140. The braking device 140 is, for example, a disk brake device. The braking device 140 is attached to the seat stay 14A of the frame 14. The braking device 140 includes a braking unit 142 that brakes a disk brake rotor 160 described later. Vehicle 10 further includes a rotation detection device 150. The rotation detection device 150 detects the rotation of the rotary body RT attached to the vehicle 10 based on the detection results of the detection unit 152 and the detection unit 52 that detect the rotation of the rotary body RT based on the change in the electrical state. And a control unit 154 that acquires information on the rotation of the rotating body RT. The rotation detection device 150 further includes a sensor housing 156 that houses the detection unit 152 and the control unit 154. Sensor housing 156 includes mounting portion 156A. The attachment portion 156A is attached to the brake housing 144 of the braking device 140. The rotation detection device 150 may be included in an element that constitutes the braking device 140. In the present embodiment, the braking device 140 further includes a rotation detection device 150.

  Vehicle 10 includes a disk brake rotor 160. The disc brake rotor 160 is provided on the hub assembly HAR of the rear wheel WR. In the present embodiment, the rotating body RT includes a disk brake rotor 160. The rotation detection device 150 acquires information on the rotation of the rotating body RT. The information on the rotation of the rotating body RT includes the angular velocity of the rotating body RT. Specifically, in the present embodiment, the control unit 154 acquires the angular velocity of the disk brake rotor 160. The configurations of the braking device 140, the rotation detecting device 150, and the disk brake rotor 160 are substantially the same as those of the braking device 40, the rotation detecting device 50, and the disk brake rotor 60, and thus detailed description will be omitted.

  If the controller 30 determines that the difference between the angular velocity of the disk brake rotor 60 and the angular velocity of the disk brake rotor 160 is equal to or greater than a predetermined value based on the information acquired from the rotation detectors 50, 150, the angular velocity is slower. Control the braking devices 40 and 140 of the disk brake rotors 60 and 160, respectively. Specifically, when the angular velocity of the disk brake rotor 60 is faster than the angular velocity of the disk brake rotor 160, the control device 30 loosens the braking device 40 so that the braking force applied to the disk brake rotor 60 by the braking unit 42. Control. On the other hand, when the angular velocity of the disk brake rotor 60 is slower than the angular velocity of the disk brake rotor 160, the control device 30 controls the braking device 140 so as to loosen the braking force applied to the disk brake rotor 160 by the braking unit 142. . That is, the control device 30 has an ABS (Antilock Brake System) function. In one example, the control device 30 controls the braking device 40, 140 by controlling at least one of an electric motor included in the braking portion 42, 142 and a pump (hydraulic mechanism) that applies hydraulic pressure to the braking portion 42, 142. Do. In the present embodiment, the rotation detection device 150 may be omitted. In this case, the ABS (Antilock Brake System) function of the control device 30 is omitted. In this example, the control unit 54 may cause the notification device 34 to output information on the traveling speed.

Second Embodiment
The rotation detection device 250 according to the second embodiment will be described with reference to FIG. About the same composition as a 1st embodiment, the same numerals as a 1st embodiment are attached, and the overlapping explanation is omitted. FIG. 5 shows the configuration of the braking device 40 and its surroundings in a left side view of the vehicle 10. As shown in FIG.

  The rotation detection device 250 detects the rotation of the rotary body RT attached to the vehicle 10 based on the detection result of the detection unit 252 and the detection unit 252 that detect the rotation of the rotary body RT based on the change in the electrical state. And a control unit 254 configured to obtain information on the rotation of the rotating body RT. The rotation detection device 250 further includes a sensor housing 256 that houses the detection unit 252 and the control unit 254. Sensor housing 256 includes mounting portion 256A. The function of the rotation detection device 250 is substantially the same as the function of the rotation detection device 50, so the detailed description will be omitted.

  In the present embodiment, the rotating body RT includes a disk brake rotor 60. The rotating body RT includes a plurality of insulating portions RT1 disposed in the circumferential direction of the rotating body RT, and a conductor portion RT2 disposed between the plurality of insulating portions RT1. The detection unit 252 is configured to intermittently detect the conductor portion RT2 as the rotating body RT rotates. The insulating portion RT1 includes at least one opening 74 provided between the plurality of coupling portions 68 of the disc brake rotor 60. The conductor portion RT2 includes a connecting portion 68. The plurality of openings 74 are arranged at equal intervals in the circumferential direction of the disk brake rotor 60, for example. The number of openings 74 is preferably in the range of five to ten. In one example, the number of openings 74 is six.

  In the present embodiment, the attachment portion 256A of the rotation detection device 250 is attached to the main body 12 of the vehicle 10. In one example, the attachment portion 256A is attached to the front fork 16 such that the detection portion 252 and the rotary body RT face each other in the direction along the center axis CA of the disc brake rotor 60. Specifically, the attachment portion 256A is attached to the left front fork 16 so that the detection portion 252 can alternately detect the insulating portion RT1 and the conductor portion RT2 by a change in impedance accompanying the rotation of the rotating body RT. The control unit 254 can acquire the traveling speed of the vehicle 10 based on the detection result of the detection unit 252.

Third Embodiment
The rotation detection device 350 according to the third embodiment will be described with reference to FIG. About the same composition as a 1st embodiment, the same numerals as a 1st embodiment are attached, and the overlapping explanation is omitted. FIG. 6 shows the configuration of the braking device 40 and its periphery in a left side view of the vehicle 10. As shown in FIG.

  The rotation detection device 350 detects the rotation of the rotation body RT attached to the vehicle 10 based on the detection result of the detection unit 352 and the detection unit 352 that detect the rotation of the rotation body RT based on the change in the electrical state. And a control unit 354 for acquiring information on the rotation of the rotating body RT. The rotation detection device 350 further includes a sensor housing 356 housing the detection unit 352 and the control unit 354. Sensor housing 356 includes mounting portion 356A. The function of the rotation detection device 350 is substantially the same as the function of the rotation detection device 50, so the detailed description will be omitted.

  In the present embodiment, the rotating body RT includes a fixture 80 for securing the disc brake rotor 60 of the vehicle 10 to the hub assembly HAF of the vehicle 10. The rotating body RT includes a plurality of insulating portions RT1 disposed in the circumferential direction of the rotating body RT, and a conductor portion RT2 disposed between the plurality of insulating portions RT1. The detection unit 352 is configured to intermittently detect the conductor portion RT2 as the rotating body RT rotates. The insulating portion RT1 includes at least one opening 82B provided between the adjacent serrations 82A. Conductor portion RT2 includes serration 82A of lock ring 82. The plurality of openings 82B are arranged at equal intervals in the circumferential direction of the lock ring 82, for example. The number of openings 82B is preferably in the range of 10 to 20. In one example, the number of openings 82B is fourteen.

  In the present embodiment, the attachment portion 356A of the rotation detection device 350 is attached to the main body 12 of the vehicle 10. In one example, the attachment portion 356A is attached to the front fork 16 such that the detection portion 352 and the rotating body RT face each other in the direction along the center axis CA of the disc brake rotor 60. Specifically, the attachment portion 356A is attached to the left front fork 16 so that the detection portion 352 can alternately detect the insulating portion RT1 and the conductor portion RT2 by a change in impedance with the rotation of the rotary body RT. The control unit 354 can acquire the traveling speed of the vehicle 10 based on the detection result of the detection unit 352.

Fourth Embodiment
The rotation detection device 450 according to the fourth embodiment will be described with reference to FIG. About the same composition as a 1st embodiment, the same numerals as a 1st embodiment are attached, and the overlapping explanation is omitted. FIG. 7 shows the configuration of the hub assembly HAF and the periphery thereof in a right side view of the vehicle 10.

  The rotation detection device 450 detects the rotation of the rotary body RT attached to the vehicle 10 based on the detection result of the detection unit 452 and the detection unit 452 that detect the rotation of the rotary body RT based on the change in the electrical state. And a control unit 454 for acquiring information on the rotation of the rotating body RT. The rotation detection device 450 further includes a sensor housing 456 housing the detection unit 452 and the control unit 454. Sensor housing 456 includes mounting portion 456A. The function of the rotation detection device 450 is substantially the same as the function of the rotation detection device 50, so the detailed description will be omitted.

  In the present embodiment, the rotating body RT includes the hub body HAF1 of the hub assembly HAF that supports the wheel W of the vehicle 10. The rotating body RT includes a plurality of insulating portions RT1 disposed in the circumferential direction of the rotating body RT, and a conductor portion RT2 disposed between the plurality of insulating portions RT1. The detection unit 452 is configured to intermittently detect the conductor portion RT2 as the rotating body RT rotates. The conductor portion RT2 includes the flange HAF2 of the hub body HAF1 to which the spokes S are attached. The flange HAF2 is made of, for example, a metal material. The insulating portion RT1 is provided on the flange HAF2 of the hub body HAF1 and includes at least one opening HAF3 to which the spokes S are not attached. The plurality of openings HAF3 are arranged at equal intervals, for example, in the circumferential direction of the flange HAF2. The number of open HAFs 3 is preferably in the range of 5 to 15. In one example, the number of openings HAF3 is eight.

  In the present embodiment, the attachment portion 456A of the rotation detection device 450 is attached to the main body 12 of the vehicle 10. In one example, attachment portion 456A is attached to front fork 16 such that detection portion 452 and rotating body RT face each other in the direction along center axis CA of disk brake rotor 60. Specifically, the attachment portion 456A is attached to the right front fork 16 so that the detection portion 452 can alternately detect the insulating portion RT1 and the conductor portion RT2 by a change in impedance accompanying the rotation of the rotary body RT. The control unit 454 can acquire the traveling speed of the vehicle 10 based on the detection result of the detection unit 452.

Fifth Embodiment
The rotation detection device 550 of the fifth embodiment will be described with reference to FIG. About the same composition as a 1st embodiment, the same numerals as a 1st embodiment are attached, and the overlapping explanation is omitted.

  The rotation detection device 550 detects the rotation of the rotary body RT attached to the vehicle 10 based on the detection result of the detection unit 552 and the detection unit 552 that detect the rotation of the rotary body RT based on the change in the electrical state. And a control unit 554 for acquiring information on the rotation of the rotating body RT. The rotation detection device 550 further includes a sensor housing 556 housing the detection unit 552 and the control unit 554. Sensor housing 556 includes mounting portion 556A. The function of the rotation detection device 550 is substantially the same as the function of the rotation detection device 50, so the detailed description will be omitted. In the present embodiment, the rotating body RT includes a disk brake rotor 60.

  In the present embodiment, the attachment portion 556A of the rotation detection device 550 is attached to the second outer surface 46B of the outer surface 46 of the brake housing 44 of the braking device 40. In one example, attachment portion 456A is attached to second outer surface 46B of brake housing 44 such that detection portion 552 faces rotating body RT in the direction along center axis CA of disk brake rotor 60. Specifically, the attachment portion 556A is provided on the second outer surface 46B of the brake housing 44 so that the detection portion 452 can alternately detect the insulating portion RT1 and the conductor portion RT2 due to a change in impedance due to the rotation of the rotating body RT. It is attached. The control unit 554 can acquire the traveling speed of the vehicle 10 based on the detection result of the detection unit 552.

Sixth Embodiment
A rotation detection device 650 of the sixth embodiment will be described with reference to FIG. About the same composition as a 1st embodiment, the same numerals as a 1st embodiment are attached, and the overlapping explanation is omitted.

  The rotation detection device 650 detects the rotation of the rotary body RT attached to the vehicle 10 based on the detection result of the detection unit 652 and the detection unit 652 that detect the rotation of the rotary body RT based on the change in the electrical state. And a controller 654 for acquiring information on the rotation of the rotating body RT. In the present embodiment, the rotating body RT includes a disk brake rotor 60. The function of the rotation detection device 650 is substantially the same as the function of the rotation detection device 50, so the detailed description will be omitted.

  In the present embodiment, the brake housing 44 of the braking device 40 accommodates the braking portion 42 and the rotation detection device 650. In one example, the detection unit 652 and the control unit 654 are provided in the brake housing 44. The brake housing 44 is configured such that the detection unit 652 can appropriately detect the detection target. In one example, the brake housing 44 is made of a material that is unlikely to affect the change in impedance detected by the detection unit 652 as the rotating body RT rotates. The brake housing 44 is at least partially made of non-metallic material. In the present embodiment, the brake housing 44 functions as a sensor housing that accommodates the detection unit 652 and the control unit 654. The rotation detection device 650 may include a sensor housing (not shown) that accommodates the detection unit 652 and the control unit 654. The control unit 654 can acquire the traveling speed of the vehicle 10 based on the detection result of the detection unit 652.

(Modification)
The description of the above embodiments is an illustration of the possible forms of the rotation detection device and the braking device according to the present invention, and is not intended to limit the form. The rotation detection device and the braking device according to the present invention may take, for example, a combination of the above-described modification of the embodiments described below and at least two modifications not inconsistent with each other. In the following modifications, the same reference numerals as in each embodiment are given to parts in common with the embodiment, and the description thereof is omitted.

  The information acquired by the control units 54, 154, 254, 354, 454, 554, and 654 can be arbitrarily changed. In one example, the control units 54, 154, 254, 354, 454, 554, 654 obtain only the angular velocity of the rotating body RT. In this case, the notification device 34 notifies information on the angular velocity of the rotating body RT.

  The configuration of the detection unit 52, 152, 252, 352, 452, 552 can be arbitrarily changed. In one example, the detection units 52, 152, 252, 352, 452, 552 are the capacitances of the capacitance between the rotating body RT and the detection units 52, 152, 252, 352, 452, 552 associated with the rotation of the rotating body RT. Detect changes. In this example, a capacitive proximity sensor capable of detecting a metal material and a resin material is employed as the detection unit 52, 152, 252, 352, 452, 552. The sensor housings 56, 156, 256, 356, 456, 556 are materials that do not easily affect the change in capacitance detected by the detection units 52, 152, 252, 352, 452, 552 as the rotating body RT rotates. Composed of The sensor housings 56, 156, 256, 356, 456, 556 are at least partially made of materials other than metal materials and resin materials. The same modified example holds true for the configuration of the detection unit 652 of the sixth embodiment.

  The arrangement of the rotation detection devices 50, 150, 250, 350, 450 can be arbitrarily changed. In the first example, the mounting portion 56A of the first embodiment is mounted to the main body 12 of the vehicle 10. According to this example, the attaching portion 56A is attached to the front fork 16 so that the detecting portion 52 can alternately detect the insulating portion RT1 and the conductor portion RT2 by a change in impedance accompanying the rotation of the rotating body RT. In the second example, the detection units 52, 252, 352, 452 are provided in the main body 12 of the vehicle 10. Specifically, the detectors 52, 252, 352, 452 are provided in the front fork 16. The front fork 16 is made of a material that is unlikely to affect the change in impedance detected by the detection units 52, 252, 352, 452 as the rotating body RT rotates. In one example, the front fork 16 is at least partially made of a nonmetallic material. According to a second example, the sensor housings 56, 256, 356, 456 may be omitted from the rotation detection device 50, 250, 350, 450. In the third example, the rotation detection device 150 is provided in the braking device 140 or in the main body 12 of the vehicle 10 so as to detect the rotation of the rotating body RT of the rear wheel WR.

The rotation detection devices 250, 350, 450, 550, and 650 of the second to sixth embodiments may be applied to the rotation detection device 150 of the first embodiment, respectively.
The vehicle 10 can be arbitrarily changed. In the first example, the vehicle 10 includes a road bike, a mountain bike, a trekking bike, or a cross bike. In the second example, the vehicle 10 includes a motorcycle, a four-wheel vehicle, and the like.

  In the first embodiment, the control device 30 and the rotation detection devices 50 and 150 may perform wireless communication. In this case, the electrical wiring between the control device 30 and the rotation detection devices 50, 150 is omitted. Control device 30 includes a wireless reception unit that receives a wireless signal. Each of the rotation detection devices 50 and 150 includes a wireless transmission unit that transmits a wireless signal. Electrical wiring between the battery 24 and the rotation detection devices 50, 150 is omitted. Rotation detection devices 50 and 150 each include a power storage unit.

DESCRIPTION OF SYMBOLS 10 ... Vehicle, 12 ... Main body, 40 ... Braking device, 42 ... Braking part, 44 ... Brake housing, 46 ... Outer surface, 48 ... Friction member, 50 ... Rotation detection apparatus, 52 ... Detection part, 54 ... Control part, 56 ... sensor housing, 56A ... mounting portion, 60 ... disk brake rotor, 62 ... inner portion, 64 ... outer portion, 66 ... outer peripheral portion, 68 ... connecting portion, 70 ... opening, 74 ... opening, 80 ... fixing member, 140 ... Braking device 142: braking portion 144: brake housing 150: rotation detection device 152: detection portion 154: control portion 156: sensor housing 156A: mounting portion 160: disc brake rotor 250: rotation detection device , 252: detection unit, 254: control unit, 256: sensor housing, 256A: attachment unit, 350: rotation detection device, 352: detection unit, 354: control unit, 56 sensor housing 356A mounting portion 450 rotation detection device 452 detection portion 454 control portion 456 sensor housing 456A mounting portion 550 rotation detection device 552 detection portion 554 control Reference numeral 556: sensor housing 556 A: mounting portion 650: rotation detection device 652: detection portion 654: control portion HAF: hub assembly HAF 1: hub body HAR: hub assembly RT: rotary body RT1 ... insulation part, RT2 ... conductor part, SL ... slit part, W ... wheel.

Claims (20)

A detection unit that detects the rotation of a rotating body attached to a vehicle based on a change in an electrical state accompanying the rotation of the rotating body;
A control unit that acquires information on the rotation of the rotating body based on the detection result of the detection unit. The rotating body includes a plurality of insulating portions disposed in the circumferential direction of the rotating body, and a conductor portion disposed between the plurality of insulating portions.
The rotation detection device according to claim 1, wherein the detection unit is configured to intermittently detect the conductor portion as the rotation body rotates.   The rotation detection device according to claim 2, wherein the detection unit detects a change in impedance associated with rotation of the rotating body.   The rotation detection device according to claim 2, wherein the detection unit detects a change in capacitance between the rotation body and the detection unit as the rotation body rotates.   The rotation detection device according to any one of claims 2 to 4, wherein the rotating body includes a disk brake rotor. The disc brake rotor includes an inner portion attached to a wheel of the vehicle, and an outer portion disposed radially outward of the disc brake rotor with respect to the inner portion.
The rotation detection device according to claim 5, wherein the insulating portion is disposed at the outer side. The outer portion includes an outer peripheral portion,
The rotation detection device according to claim 6, wherein the insulating portion includes at least one opening provided in the outer peripheral portion so as to penetrate the outer side portion. The outer portion includes an outer peripheral portion, and a plurality of connecting portions connecting the outer peripheral portion and the inner portion.
The rotation detection device according to claim 6, wherein the insulating portion includes at least one opening provided between the plurality of coupling portions.   The rotation detection device according to any one of claims 1 to 4, wherein the rotating body includes a hub of a hub assembly that supports a wheel of the vehicle.   The rotation detecting device according to any one of claims 1 to 4, wherein the rotating body includes a fixture for fixing a disk brake rotor of the vehicle to a hub assembly of the vehicle.   The rotation detection device according to any one of claims 1 to 10, wherein the detection unit is arranged to be separated from the rotating body. The information on the rotation of the rotating body includes the angular velocity of the rotating body,
The rotation detection device according to any one of claims 1 to 11, wherein the control unit acquires a traveling speed of the vehicle based on the angular velocity.   The rotation detection device according to any one of claims 1 to 12, further comprising a sensor housing accommodating at least the detection unit.   The rotation detection device according to claim 13, wherein the sensor housing is at least partially made of a nonmetallic material. The sensor housing includes an attachment portion
The rotation detection device according to claim 13, wherein the attachment portion is attached to an outer surface of a braking device of the vehicle. The sensor housing includes an attachment portion
The rotation detection device according to claim 13, wherein the attachment portion is attached to a main body of the vehicle.   The rotation detection device according to any one of claims 1 to 16, wherein the vehicle is a bicycle. A rotation detection device according to any one of claims 5 to 8,
A braking unit for braking the disk brake rotor;
A slit portion provided in the braking portion and in which the disc brake rotor is accommodated;
A friction member in contact with the disc brake rotor disposed in the slit portion. The rotation detection device further includes a sensor housing that accommodates at least the detection unit,
The braking device according to claim 18, wherein the sensor housing is at least partially made of non-metallic material. It further comprises a brake housing that accommodates the braking portion and the rotation detection device,
The braking device according to claim 18, wherein the brake housing is at least partially made of non-metallic material.