WO2015033492A1 - Bicycle speed detection device, and bicycle - Google Patents

Bicycle speed detection device, and bicycle Download PDF

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Publication number
WO2015033492A1
WO2015033492A1 PCT/JP2014/002375 JP2014002375W WO2015033492A1 WO 2015033492 A1 WO2015033492 A1 WO 2015033492A1 JP 2014002375 W JP2014002375 W JP 2014002375W WO 2015033492 A1 WO2015033492 A1 WO 2015033492A1
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WO
WIPO (PCT)
Prior art keywords
bicycle
hub
vehicle speed
detection device
speed detection
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PCT/JP2014/002375
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French (fr)
Japanese (ja)
Inventor
章弘 谷脇
菅　祐司
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パナソニックＩｐマネジメント株式会社
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Application filed by パナソニックＩｐマネジメント株式会社 filed Critical パナソニックＩｐマネジメント株式会社
Priority to JP2015535288A priority Critical patent/JPWO2015033492A1/en
Priority to CN201480045473.1A priority patent/CN105473436B/en
Publication of WO2015033492A1 publication Critical patent/WO2015033492A1/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62M—RIDER PROPULSION OF WHEELED VEHICLES OR SLEDGES; POWERED PROPULSION OF SLEDGES OR SINGLE-TRACK CYCLES; TRANSMISSIONS SPECIALLY ADAPTED FOR SUCH VEHICLES
    • B62M6/00—Rider propulsion of wheeled vehicles with additional source of power, e.g. combustion engine or electric motor
    • B62M6/40—Rider propelled cycles with auxiliary electric motor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62M—RIDER PROPULSION OF WHEELED VEHICLES OR SLEDGES; POWERED PROPULSION OF SLEDGES OR SINGLE-TRACK CYCLES; TRANSMISSIONS SPECIALLY ADAPTED FOR SUCH VEHICLES
    • B62M6/00—Rider propulsion of wheeled vehicles with additional source of power, e.g. combustion engine or electric motor
    • B62M6/40—Rider propelled cycles with auxiliary electric motor
    • B62M6/45—Control or actuating devices therefor
    • B62M6/50—Control or actuating devices therefor characterised by detectors or sensors, or arrangement thereof
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62M—RIDER PROPULSION OF WHEELED VEHICLES OR SLEDGES; POWERED PROPULSION OF SLEDGES OR SINGLE-TRACK CYCLES; TRANSMISSIONS SPECIALLY ADAPTED FOR SUCH VEHICLES
    • B62M6/00—Rider propulsion of wheeled vehicles with additional source of power, e.g. combustion engine or electric motor
    • B62M6/40—Rider propelled cycles with auxiliary electric motor
    • B62M6/70—Rider propelled cycles with auxiliary electric motor power-driven at single endless flexible member, e.g. chain, between cycle crankshaft and wheel axle, the motor engaging the endless flexible member

Definitions

  • the present invention relates to a vehicle speed detection device for detecting the traveling speed of a bicycle, and a bicycle provided with the vehicle speed detection device.
  • the vehicle speed detection device 100 is provided with a substantially disk-shaped holding member 102 holding a plurality of magnets 101 in the circumferential direction and the holding member 102 so as to face each other. And a detection unit (sensor unit) 103 for detecting a change.
  • the holding member 102 is made of a substantially disk-shaped resin member, and is assembled on the outer side (lateral side) of the spoke 105 in the vicinity of the axial center of the wheel 104. Further, the detection unit 103 is attached in the vicinity of the front end portion of the front fork 106 in a posture facing the magnet 101 held by the holding member 102.
  • the holding member 102 for holding the magnet 101 and the detection unit (sensor unit) 103 are disposed at the outer location (side) of the spoke 105 or in the vicinity thereof. As shown in 7, when the bicycle wheel 104 is inserted into the guide frame 151 for wheel locking provided in the bicycle parking apparatus 150 during parking, the holding member 102 of the vehicle speed detection device 100 and the detection unit 103 And the like may abut the guide frame 151 and be damaged, and in this case, there is a problem that the vehicle speed can not be detected.
  • the vehicle speed detection device 100 can be used as the guide frame 151 of the bicycle parking apparatus 150. There was a high probability of contact failure.
  • the holding member 102 and the detection unit 103 of the vehicle speed detection device 100 may be damaged by coming into contact with an adjacent bicycle or a standing pole when the bicycle is parked or moved.
  • the present invention solves the above-mentioned problems and the like, and can prevent a damage due to contact with a guide frame of a bicycle parking apparatus or an adjacent bicycle, etc., and can minimize the remodeling. It is an object to provide an apparatus.
  • a vehicle speed detection device for a bicycle includes a hub axle fixed to a frame body, and a wheel center portion provided rotatably with respect to the hub axle.
  • a vehicle speed detection device for a bicycle comprising: an integrally rotating hub; a magnetism generator that generates magnetism; and a detection body that detects a change in magnetism by the magnetism generator to detect a vehicle speed, wherein the magnetism generation A body and the detection body are disposed inside the hub, the magnetism generation body is fixed to the side of the hub, and the detection body is fixed to the side of the hub shaft.
  • the magnetism generating body and the detection body are disposed inside the hub, and therefore, there are many bicycles and pillars, etc. when putting a wheel along the guide frame of the bicycle parking apparatus at the time of parking etc. Even when parked at a place, the magnet generator and the detector are protected by the hub and prevented from being broken.
  • a large number of magnetism generating bodies can be disposed in a region near the outer periphery inside the hub. This makes it possible to improve the vehicle speed detection capability.
  • the hub is rotatably supported by the paired bearings in the axle direction, and the magnetism generating body and the detection body are in the axle direction in the hub. Are disposed at positions between paired bearings.
  • the magnetism generating body and the detection body are disposed at the same position as the bearing in the axle direction in the hub, the bearing and the magnetism generating body in the radial direction As the detection bodies overlap, the structure becomes complicated and the hub becomes larger in diameter. Further, since it is close to the surface of the hub, it is susceptible to external influences such as being exposed to wind and rain.
  • the magnetism generation is performed by arranging the magnetism generating body and the detection body at a position between the paired bearings in the inside of the hub with respect to the axle direction.
  • the structure is complicated because the body and the detection body are disposed at a position where the bearing and the magnetism generation body or the detection body do not overlap in the radial direction and are close to the central portion of the hub. And the hub does not increase in diameter.
  • a reed switch as the detection body. Further, in this case, if the reed switch is disposed along the axle direction, it can be disposed as a hub with a relatively small diameter without any problem. That is, when the reed switch is arranged in a direction perpendicular to the axle direction, although a hub having a relatively large diameter is required as the hub, such a problem does not occur.
  • magnets permanent magnets
  • the vehicle speed detection device can be realized relatively easily and inexpensively. Further, as in the case of the reed switch, by arranging the magnet along the axle direction, the magnetism (magnetic field) fluctuates relatively large, and a vehicle speed detection device with high detection capability can be realized.
  • the detection body can be protected better, and even if water, moisture, dust, etc. may enter the inside of the hub, the vehicle speed can be increased. It can keep detecting well.
  • the plurality of magnets are held by an annular holding member disposed inside the hub, the annular holding member is divided into a plurality of parts with respect to the axle direction, and the magnets are divided into holding members. It may be held in a sandwiched state. According to this configuration, the plurality of magnets can be disposed in a state of being well dispersed in the circumferential direction.
  • the bicycle provided with the vehicle speed detection device it is particularly suitable when the wheel has a small diameter of 22 inches or less, such as a bicycle in which a child carrier device is disposed above the front wheel It is not a thing.
  • the wheel when the wheel is a small diameter wheel of 22 inches or less, when inserting a wheel of a bicycle into a guide frame for a wheel stopper provided on a parking apparatus at the time of parking, it is possible to use a conventional structure.
  • the vehicle speed detection device has a high probability of breakage, according to the present invention, since the vehicle speed detection device can be reliably prevented from being damaged, the reliability is particularly improved.
  • the magnetism generating body and the detecting body are mounted even when the wheel is inserted along the guide frame of the bicycle parking apparatus at parking etc
  • the detection body is protected by the hub and prevented from being broken.
  • the hub has a sufficient rigidity so that the magnetism generator and the detector can be protected extremely well.
  • the magnetism generating body and the detection body are not disposed at the exposed portion to the outside, tampering with the magnetism generation body and the detection body or the like can be minimized. As a result, a highly reliable vehicle speed detection device can be realized.
  • the structure is complicated by arranging the magnetism generating body and the detection body at a position between the paired bearings which rotatably support the hub (position between the bearings with respect to the axle direction).
  • the hub can be prevented from increasing in diameter, and a compact, simple and inexpensive vehicle speed detection device can be realized.
  • the reed switch By arranging the reed switch along the axle direction, it is possible to arrange the hub having a relatively small diameter without any problem. Further, by providing a plurality of magnets as the magnetism generating body and arranging these magnets along the axle direction in the same manner as the reed switch, the magnetism (magnetic field) is relatively largely varied and detected. A high-performance vehicle speed detection device can be realized.
  • the vehicle speed can be continuously detected favorably, and the reliability is further improved.
  • the wheel has a small diameter of 22 inches or less, such as a bicycle in which a child carrying device is disposed above the front wheel, it is used for a wheel stopper provided in the bicycle parking device at the time of parking.
  • the vehicle speed detection device When inserting the wheel of a bicycle into the guide frame, the vehicle speed detection device has a high probability of breakage in the conventional structure, but according to the present invention, the vehicle speed detection device is surely prevented from being damaged even in such a case. As it can, there is an advantage that the reliability is particularly improved.
  • an electrically assisted bicycle will be described as an example of a bicycle provided with a vehicle speed detection device.
  • the present invention is not limited to the electrically assisted bicycle, and can be applied to various bicycles.
  • the configuration of the present invention is not limited to the configuration described below.
  • the left-right direction and the front-back direction in the following description mean the direction in the state of getting on the motor-assisted bicycle 1 in the traveling direction.
  • the electrically assisted bicycle 1 includes a vehicle body 2, a front wheel 3, a rear wheel 4, and a chain 6 as a driving force transmission body for transmitting a pedaling force (a manual driving force) of the pedal 5 to the rear wheel 4. Detection is performed by an electric auxiliary drive unit 7 for applying an auxiliary driving force generated from an electric motor, a vehicle speed detection unit 8 disposed inside the hub 23 of the front wheel 3 as described later, and the vehicle speed detection unit 8 A control device 9 that controls the auxiliary drive device 7 according to the determined vehicle speed, a saddle 10, and a battery 20 are provided.
  • the battery 20 is an example of a storage battery and is preferably a secondary battery, but another example of the storage battery may be a capacitor or the like. Further, in this embodiment, the electrically assisted bicycle 1 is also provided with a device 11 for carrying a child.
  • the vehicle body 2 is composed of a frame body 12 forming a body frame portion, a handle 13 and the like, and the frame body 12 further includes a head pipe 14, a front fork 15, a down pipe 16, a standing pipe 17 and a back fork 18. And a chain stay 19 and the like.
  • the child carrier device 11 is disposed above the front wheel 3 and the head pipe 14 so as to be held between the bifurcated handles 13. Then, even when the driver on the saddle 10 places a child on the child carrier 11, the front wheel 3 has a small diameter (for example, 20 inches, etc.) 22 so that the front view is not blocked. Or less) are used.
  • the front wheel 3 is integrated with the tire 21, the rim 22 provided on the inner periphery of the tire 21, and the center portion of the tire 21 and rim 22 of the front wheel 3.
  • the hub 23 has a pair of left and right hooks 23a, and the inner end of each spoke 25 is locked to the hook 23a.
  • both ends of the hub axle (axle) 24 are inserted into slits (not shown) of the fork claws 15 a provided at the lower end of the front fork 15, and the hub axle (axle) 24 is Both fork claws 15a are fastened by a nut 26 (an example of a fastening member) screwed to both ends. Thereby, the front wheel 3 is attached to the front fork 15.
  • the vehicle speed detection device 8 includes a magnet (permanent magnet) 31 as a magnetism generator that generates magnetism, and a magnet (permanent magnet) for detecting the vehicle speed of the motor-assisted bicycle 1. It has one reed switch 32 as a detection body which detects the magnetic change by the magnet 31). A plurality of magnets 31 are provided, and the plurality of magnets (permanent magnets) 31 and the reed switch 32 are disposed inside the hub 23.
  • the hub 23 is made of metal (in this embodiment, made of aluminum), the magnets 31 are fixed to the hub 23 side, and the reed switch 32 is fixed to the hub shaft 24 side.
  • the hub 23 is composed of a substantially cylindrical hub body 23b having an open right side, and a hub lid 23c screwed into the opening of the hub body 23b. Then, bearings 27 (27A, 27B) for rotatably supporting the hub 23 are provided in pairs in the axle direction on the left side inner periphery of the hub body 23b and the inner periphery of the hub lid 23c. There is.
  • a first outer barrel 33 on the left and a second outer sleeve 34 on the right which are made of metal and are screwed from the outside to the hub axle 24, and the first outer barrels thereof
  • a large diameter switch housing 35 is assembled, which is made of resin and held from the left and right by the second outer cylindrical portion 34.
  • the reed switch 32 and the switch assembly board 36 are disposed in a direction along the axle direction of the hub axle 24 at a part of the switch housing 35 near the outer periphery. In FIG. 4, the reed switch 32, the switch assembly substrate 36 and the like are shown in a state in which the switch housing 35 is omitted.
  • the reed switch 32 and the switch assembly substrate 36 are also covered from the outer periphery by the first outer cylindrical portion 33 and the second outer cylindrical portion 34, while being disposed in a magnetic passing state. Further, although not shown, the electrical signal of the reed switch 32 is output to the control device 9 through the connection wiring taken out of the hub 23 through the groove formed in the outer peripheral part of the second outer cylinder 34 and the like. There is.
  • the left bearing 27A is assembled on the outer periphery of the left end of the first outer cylinder portion 33
  • the right bearing 27B is assembled on the outer periphery of the right end of the second outer cylinder portion 34.
  • the first and second magnet holding members 37 made of resin and divided into right and left to hold the magnets 31 from the left and right are substantially annular. , 38 are assembled.
  • each magnet 31 is also positioned between the left and right bearings 27 (27A, 27B) so that each magnet 31 faces through the switch housing 35 and the magnet holding members 37, 38. , And the hub 23 in a posture along the axle direction.
  • the magnets 31 are arranged at appropriate intervals in the circumferential direction of the magnet holding members 37 and 38, and as schematically shown in FIG. 4, the adjacent magnets 31 have their magnetic fields reverse to each other. It is arranged to be
  • the hub 23 has extremely high rigidity so as not to be damaged even by receiving the force from the ground contact surface via the spokes 25.
  • the magnet 31 as the magnetism generator and the reed switch 32 as the detector are disposed inside the hub 23 having extremely high rigidity.
  • the magnet 31 and the reed switch 32 are not disposed at the exposed portion, it is possible to minimize the possibility of tampering with the magnet 31 and the reed switch 32. As a result, a highly reliable vehicle speed detection device 8 can be realized.
  • many magnets 31 can be disposed in an area near the outer periphery inside the hub 23, and It is possible to improve the detection capability.
  • a magnetism generating body such as a magnet or a detection body such as a reed switch is disposed at the same position as the bearing in the axle direction inside the hub, that is, on the outer peripheral side of the bearing.
  • the bearing and the magnetism generating body or the detection body overlap in the radial direction, which complicates the structure or increases the diameter of the hub.
  • it since it is close to the surface of the hub, it also has the disadvantage of being susceptible to external influences such as being exposed to wind and rain.
  • the magnet 31 and the reed switch 32 are disposed in the hub 23 at a position between the paired bearings 27 (27A, 27B) in the axle direction. doing.
  • the magnet 31 and the reed switch 32 do not overlap the bearings 27 (27A, 27B) in the radial direction, and are disposed at a position closer to the center of the hub 23 in the axle direction. Therefore, the structure is not complicated and the hub 23 is not enlarged. Therefore, it is possible to realize the vehicle speed detection device 8 which is compact, simple in structure and inexpensive.
  • the hub 23 is disposed further to the back than the bearings 27 (27A, 27B) inside, the hub 23 is less susceptible to external influences such as being exposed to wind and rain.
  • the bearings 27 (27A, 27B) are covered from the side by the cover members 41, 42 and the like, whereby water, moisture, dust, etc. are transmitted through the bearings 27 (27A, 27B). Intrusion into the interior of the hub 23 is also prevented, and the reliability is further improved.
  • the vehicle speed detection device 8 is extremely simple and inexpensive without the need for complicated control means or the like. Can be realized. That is, for example, it is conceivable to use a dynamo device capable of generating electric power as a magnetic generator and to measure the voltage from this dynamo device, but in this case, voltage measuring means, expensive control means and relatively expensive A dynamo device is required.
  • the vehicle speed detection device 8 can be manufactured inexpensively using the inexpensive magnet (permanent magnet) 31 and the reed switch 32, and the structure is also extremely simple.
  • the reed switch 32 since the reed switch 32 is disposed along the axle direction, it is possible to dispose the hub 23 with a relatively small diameter without any problem. That is, if the reed switch is arranged in a direction perpendicular to the axle direction, a hub having a relatively large diameter is required, but such a problem does not occur. Further, by providing a plurality of magnets 31 as the magnetism generating body and arranging these magnets 31 along the axle direction in the same manner as the reed switch 32, the magnetism (magnetic field) fluctuates relatively large, The vehicle speed detection device 8 with high detection capability can be realized.
  • the reed switch 32 since the reed switch 32 is covered by the switch housing 35 made of resin, the reed switch 32 can be protected better, and water should be contained in the hub 23 in any case. Even if moisture, dust, or the like enters, the vehicle speed can be detected favorably, and good reliability can be maintained.
  • the configuration is relatively simple. There is also an advantage that the plurality of magnets 31 can be disposed in a state of being well dispersed in the circumferential direction.
  • the vehicle speed detection device 8 is particularly suitable when the wheel has a small diameter of 22 inches or less, such as the bicycle 1 in which the child carrier device 11 is disposed above the front wheel 3. .
  • the present invention is not limited to this, and as a matter of course, as shown in FIG. 5, the present invention is also applicable to various bicycles 40 in which the diameter of its wheel 43 is larger than 22 inches.
  • the bicycles 1 and 40 were electrically-assisted bicycles was described in the said embodiment, it does not restrict to this, It is applicable also to the bicycle etc. which have a meter etc. which can measure a vehicle speed.
  • the vehicle speed detection device 8 is provided on the hub 23 of the front wheel 3.
  • the present invention is not limited to this, and the vehicle speed detection device may be provided on the rear wheel hub .
  • the vehicle speed detection device may be provided on the rear wheel hub .
  • a reed switch was used as a detection body which detects a magnetic change was described in the said embodiment, it does not restrict to this, You may use a Hall element (Hall IC) etc. as a detection body.
  • the present invention is applicable to various bicycles provided with a vehicle speed detection device.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Force Measurement Appropriate To Specific Purposes (AREA)

Abstract

Provided is a bicycle speed detection device that can prevent damage resulting from a contact with a guide frame of a parking device or an adjacent bicycle and the like, and that can minimize possible modification. A vehicle speed detection device (8) includes: a hub shaft (24) fixed to a frame member (12); a hub (23) that is mounted to a central portion of a front wheel rotatably with respect to the hub shaft (24) and that integrally rotates with the front wheel; a plurality of magnets (31) as a magnetism generator for generating magnetism; and a lead switch (32) as a detector for detecting a magnetic change caused by the magnets (31) so as to detect a vehicle speed. The magnets (31) and the lead switch (32) are disposed inside the hub (23), the magnets (31) being fixed on the hub (23) side and the lead switch (32) being fixed on the hub shaft (24) side.

Description

自転車の車速検出装置および自転車Bicycle speed detection device and bicycle
　本発明は、自転車の走行速度を検出する車速検出装置、および、車速検出装置を備えた自転車に関する。 The present invention relates to a vehicle speed detection device for detecting the traveling speed of a bicycle, and a bicycle provided with the vehicle speed detection device.
　従来、自転車の走行速度を検出する車速検出装置としては、車輪と共に回転する複数の磁石による磁気の変動を検出し、これに基づいて走行速度を求める方式のものがある。この種の車速検出装置は、例えば特許文献１に開示されている。図６に示すように、この車速検出装置１００は、複数の磁石１０１を周方向に保持した略円盤形状の保持部材１０２と、保持部材１０２と対向するように配設されて磁石１０１による磁気の変化を検出する検出部（センサ部）１０３とを有している。 Conventionally, as a vehicle speed detection device for detecting a traveling speed of a bicycle, there is a system of detecting a variation in magnetism due to a plurality of magnets rotating together with wheels and determining the traveling speed based on this. A vehicle speed detection device of this type is disclosed, for example, in Patent Document 1. As shown in FIG. 6, the vehicle speed detection device 100 is provided with a substantially disk-shaped holding member 102 holding a plurality of magnets 101 in the circumferential direction and the holding member 102 so as to face each other. And a detection unit (sensor unit) 103 for detecting a change.
　図６、図７に示すように、保持部材１０２は、略円盤形状の樹脂製部材で構成され、車輪１０４の軸心部近傍におけるスポーク１０５の外側（側方）に組み付けられる。また、検出部１０３は、前フォーク１０６の先端部近傍などに、保持部材１０２に保持された磁石１０１に臨む姿勢で取り付けられている。 As shown in FIGS. 6 and 7, the holding member 102 is made of a substantially disk-shaped resin member, and is assembled on the outer side (lateral side) of the spoke 105 in the vicinity of the axial center of the wheel 104. Further, the detection unit 103 is attached in the vicinity of the front end portion of the front fork 106 in a posture facing the magnet 101 held by the holding member 102.
特開２０１０－１７９８７７公報Japanese Patent Application Publication No. 2010-179877
　しかしながら、上記従来の車速検出装置は、スポーク１０５の外側箇所（側方）やその近傍などに、磁石１０１を保持する保持部材１０２や検出部（センサ部）１０３が配設されているため、図７に示すように、駐輪時において、駐輪装置１５０に設けられている車輪止め用のガイドフレーム１５１に自転車の車輪１０４を挿入する際に、車速検出装置１００の保持部材１０２や検出部１０３などがガイドフレーム１５１に当接して破損することがあり、この場合には、車速を検出できなくなるという課題を生じていた。特に、子乗せ用の自転車など、自転車の車輪１０４が小径である場合（例えば、車輪が２２インチ以下の小径である場合など）には、車速検出装置１００が駐輪装置１５０のガイドフレーム１５１に当接して破損する確率が高かった。 However, in the conventional vehicle speed detection device described above, the holding member 102 for holding the magnet 101 and the detection unit (sensor unit) 103 are disposed at the outer location (side) of the spoke 105 or in the vicinity thereof. As shown in 7, when the bicycle wheel 104 is inserted into the guide frame 151 for wheel locking provided in the bicycle parking apparatus 150 during parking, the holding member 102 of the vehicle speed detection device 100 and the detection unit 103 And the like may abut the guide frame 151 and be damaged, and in this case, there is a problem that the vehicle speed can not be detected. In particular, when the bicycle wheel 104 has a small diameter, such as a bicycle for carrying a child (for example, when the wheel has a small diameter of 22 inches or less), the vehicle speed detection device 100 can be used as the guide frame 151 of the bicycle parking apparatus 150. There was a high probability of contact failure.
　また、車速検出装置１００の保持部材１０２や検出部１０３などが、自転車の駐輪時や移動時などに、隣接する自転車や、立設する柱（ポール）などに当接して破損することもあった。さらには、保持部材１０２や検出部１０３が外部に露出しているため、保持部材１０２や検出部１０３が改造されるなど悪戯される可能性もあった。 In addition, the holding member 102 and the detection unit 103 of the vehicle speed detection device 100 may be damaged by coming into contact with an adjacent bicycle or a standing pole when the bicycle is parked or moved. The Furthermore, since the holding member 102 and the detection unit 103 are exposed to the outside, there is a possibility that the holding member 102 and the detection unit 103 may be tampered with.
　本発明は上記課題などを解決するもので、駐輪装置のガイドフレームや隣接する自転車などに当接して破損することを防止でき、改造されることも最小限に抑えることができる自転車の車速検出装置を提供することを目的とするものである。 SUMMARY OF THE INVENTION The present invention solves the above-mentioned problems and the like, and can prevent a damage due to contact with a guide frame of a bicycle parking apparatus or an adjacent bicycle, etc., and can minimize the remodeling. It is an object to provide an apparatus.
　上記課題を解決するために本発明の自転車の車速検出装置は、フレーム体に対して固定されるハブ軸と、車輪の中心部に前記ハブ軸に対して回転自在に設けられて、前記車輪と一体的に回転するハブと、磁気を発生する磁気発生体と、車速を検出するために前記磁気発生体による磁気変化を検出する検出体とを有する自転車の車速検出装置であって、前記磁気発生体および前記検出体が前記ハブの内部に配設され、前記磁気発生体が前記ハブの側に固定され、前記検出体が前記ハブ軸の側に固定されていることを特徴とする。 In order to solve the above problems, a vehicle speed detection device for a bicycle according to the present invention includes a hub axle fixed to a frame body, and a wheel center portion provided rotatably with respect to the hub axle. A vehicle speed detection device for a bicycle, comprising: an integrally rotating hub; a magnetism generator that generates magnetism; and a detection body that detects a change in magnetism by the magnetism generator to detect a vehicle speed, wherein the magnetism generation A body and the detection body are disposed inside the hub, the magnetism generation body is fixed to the side of the hub, and the detection body is fixed to the side of the hub shaft.
　この構成により、磁気発生体および検出体がハブの内部に配設されているので、駐輪時などに駐輪装置のガイドフレームに沿って車輪を入れる際や、多くの自転車や柱などがある場所に駐輪する際などでも、前記磁気発生体および前記検出体が前記ハブにより保護されて破損することが防止される。また、前記磁気発生体を前記ハブの側に固定し、前記検出体を前記ハブ軸の側に固定することで、多くの磁気発生体を前記ハブの内部における外周寄り領域に配設することができて、車速の検出能力を向上させることが可能となる。 With this configuration, the magnetism generating body and the detection body are disposed inside the hub, and therefore, there are many bicycles and pillars, etc. when putting a wheel along the guide frame of the bicycle parking apparatus at the time of parking etc. Even when parked at a place, the magnet generator and the detector are protected by the hub and prevented from being broken. In addition, by fixing the magnetism generating body to the side of the hub and fixing the detection body to the side of the hub shaft, a large number of magnetism generating bodies can be disposed in a region near the outer periphery inside the hub. This makes it possible to improve the vehicle speed detection capability.
　また、本発明の自転車の車速検出装置は、ハブが、車軸方向に対して対となった軸受により回転自在に支持され、前記磁気発生体および前記検出体が、前記ハブの内部における、車軸方向に対して対となった軸受の間の位置に配設されていることを特徴とする。 In the bicycle vehicle speed detection device according to the present invention, the hub is rotatably supported by the paired bearings in the axle direction, and the magnetism generating body and the detection body are in the axle direction in the hub. Are disposed at positions between paired bearings.
　例えば、前記磁気発生体および前記検出体が、前記ハブの内部における、車軸方向に対して軸受と同様な位置に配設されている場合には、径方向に対して軸受と前記磁気発生体や前記検出体が重なることとなって、構造が複雑化したり、前記ハブが大径化したりする。また、前記ハブの表面部に近いので、風雨に晒されるなどの外部の影響を受けやすい。 For example, when the magnetism generating body and the detection body are disposed at the same position as the bearing in the axle direction in the hub, the bearing and the magnetism generating body in the radial direction As the detection bodies overlap, the structure becomes complicated and the hub becomes larger in diameter. Further, since it is close to the surface of the hub, it is susceptible to external influences such as being exposed to wind and rain.
　これに対して、上記のように、前記磁気発生体および前記検出体を、前記ハブの内部における、車軸方向に対して対となった軸受の間の位置に配設することにより、前記磁気発生体および前記検出体が、径方向に対して軸受と前記磁気発生体や前記検出体が重ならず、前記ハブの中心部に寄った位置に配設されることとなるので、構造が複雑化したり、前記ハブが大径化したりすることがない。 On the other hand, as described above, the magnetism generation is performed by arranging the magnetism generating body and the detection body at a position between the paired bearings in the inside of the hub with respect to the axle direction. The structure is complicated because the body and the detection body are disposed at a position where the bearing and the magnetism generation body or the detection body do not overlap in the radial direction and are close to the central portion of the hub. And the hub does not increase in diameter.
　なお、前記検出体としては、リードスイッチを用いると好適である。また、この場合には、前記リードスイッチを車軸方向に沿って配設すると、前記ハブとして、比較的小さな径のものにも支障なく配設できる。つまり、前記リードスイッチを、車軸方向に対して直交する向きに配設しようとすると、前記ハブとして、比較的大きな径のものが必要となるが、このような不具合を生じることがない。 It is preferable to use a reed switch as the detection body. Further, in this case, if the reed switch is disposed along the axle direction, it can be disposed as a hub with a relatively small diameter without any problem. That is, when the reed switch is arranged in a direction perpendicular to the axle direction, although a hub having a relatively large diameter is required as the hub, such a problem does not occur.
　また、前記磁気発生体としては、磁石（永久磁石）を用いるとともに、複数の磁石を設け、これらの磁石を車軸方向に沿って配設させることが好ましい。さらに、この場合に、隣り合う磁石が、その磁界が逆向きとなるように配設することが好ましい。 In addition to using magnets (permanent magnets) as the magnetism generating body, it is preferable to provide a plurality of magnets, and to arrange these magnets along the axle direction. Furthermore, in this case, it is preferable to arrange adjacent magnets so that their magnetic fields are in the opposite direction.
　この構成により、前記磁気発生体として磁石を用いることで、比較的簡単かつ安価に車速検出装置を実現できる。また、前記リードスイッチと同様に、前記磁石を車軸方向に沿って配設することで、磁気（磁界）が比較的大きく変動して、検出能力の高い車速検出装置を実現できる。 With this configuration, by using a magnet as the magnetism generator, the vehicle speed detection device can be realized relatively easily and inexpensively. Further, as in the case of the reed switch, by arranging the magnet along the axle direction, the magnetism (magnetic field) fluctuates relatively large, and a vehicle speed detection device with high detection capability can be realized.
　また、前記検出体を樹脂で覆うことにより、検出体をさらに良好に保護することができて、万一、ハブの内部に、水や湿気、埃などが侵入することがあっても、車速を良好に検出し続けることができる。 Further, by covering the detection body with resin, the detection body can be protected better, and even if water, moisture, dust, etc. may enter the inside of the hub, the vehicle speed can be increased. It can keep detecting well.
　また、前記複数の磁石を前記ハブの内側に配設された環状の保持部材により保持させ、前記環状の保持部材を車軸方向に対して複数に分割させ、各磁石を、分割させた保持部材に挟まれた状態で保持させてもよい。この構成によれば、複数の磁石を周方向に良好に分散させた状態で配設できる。 Further, the plurality of magnets are held by an annular holding member disposed inside the hub, the annular holding member is divided into a plurality of parts with respect to the axle direction, and the magnets are divided into holding members. It may be held in a sandwiched state. According to this configuration, the plurality of magnets can be disposed in a state of being well dispersed in the circumferential direction.
　また、この車速検出装置が設けられる自転車としては、前車輪の上方に子乗せ装置が配設されている自転車など、その車輪が２２インチ以下の小径である場合に特に適しているがこれに限るものではない。なお、車輪が２２インチ以下の小径の車輪である場合には、駐輪時において、駐輪装置に設けられている車輪止め用のガイドフレームに自転車の車輪を挿入する際に、従来の構造では車速検出装置が破損する確率が高かったが、本発明では車速検出装置が破損することを確実に防止できるので、信頼性が特に向上する。 Moreover, as the bicycle provided with the vehicle speed detection device, it is particularly suitable when the wheel has a small diameter of 22 inches or less, such as a bicycle in which a child carrier device is disposed above the front wheel It is not a thing. In addition, when the wheel is a small diameter wheel of 22 inches or less, when inserting a wheel of a bicycle into a guide frame for a wheel stopper provided on a parking apparatus at the time of parking, it is possible to use a conventional structure. Although the vehicle speed detection device has a high probability of breakage, according to the present invention, since the vehicle speed detection device can be reliably prevented from being damaged, the reliability is particularly improved.
　本発明によれば、磁気発生体および検出体をハブの内部に配設したことにより、駐輪時などに駐輪装置のガイドフレームに沿って車輪を入れる際などでも、前記磁気発生体および前記検出体が前記ハブにより保護されて破損することが防止される。特にハブは、十分な剛性を有するため、前記磁気発生体および前記検出体が極めて良好に保護される。また、前記磁気発生体および前記検出体が外部に露出した箇所に配設されないので、前記磁気発生体や前記検出体が改造されるなど悪戯されることも最小限に抑えられる。この結果、極めて信頼性の高い車速検出装置を実現できる。また、前記磁気発生体を前記ハブの側に固定し、前記検出体を前記ハブ軸の側に固定することで、多くの磁気発生体を前記ハブの内部における外周寄り領域に配設することができて、車速の検出能力を向上させることが可能となる。 According to the present invention, by arranging the magnetism generating body and the detecting body inside the hub, the magnetism generating body and the magnetism generating body and the magnetism generating body described above are mounted even when the wheel is inserted along the guide frame of the bicycle parking apparatus at parking etc The detection body is protected by the hub and prevented from being broken. In particular, the hub has a sufficient rigidity so that the magnetism generator and the detector can be protected extremely well. Further, since the magnetism generating body and the detection body are not disposed at the exposed portion to the outside, tampering with the magnetism generation body and the detection body or the like can be minimized. As a result, a highly reliable vehicle speed detection device can be realized. In addition, by fixing the magnetism generating body to the side of the hub and fixing the detection body to the side of the hub shaft, a large number of magnetism generating bodies can be disposed in a region near the outer periphery inside the hub. This makes it possible to improve the vehicle speed detection capability.
　また、前記磁気発生体および前記検出体を、ハブを回転自在に支持する対となった軸受の間の位置（車軸方向に対する軸受間の位置）に、配設することにより、構造が複雑化したり、前記ハブが大径化したりすることを防止できて、コンパクトでかつ構造が簡単で安価な車速検出装置を実現できる。 Further, the structure is complicated by arranging the magnetism generating body and the detection body at a position between the paired bearings which rotatably support the hub (position between the bearings with respect to the axle direction). The hub can be prevented from increasing in diameter, and a compact, simple and inexpensive vehicle speed detection device can be realized.
　また、前記検出体として、リードスイッチを用いたり、前記磁気発生体として、磁石（永久磁石）を用いたりすることで、複雑な制御手段などを必要とせずに、極めて簡単で安価な車速検出装置を実現できる。 Further, by using a reed switch as the detection body or using a magnet (permanent magnet) as the magnetic generation body, an extremely simple and inexpensive vehicle speed detection device without requiring complicated control means and the like. Can be realized.
　また、前記リードスイッチを、車軸方向に沿って配設することにより、前記ハブとして、比較的小さな径のものにも支障なく配設できる。また、前記磁気発生体として、複数の磁石を設け、これらの磁石を、前記リードスイッチと同様に、車軸方向に沿って配設することで、磁気（磁界）が比較的大きく変動して、検出能力の高い車速検出装置を実現できる。 Further, by arranging the reed switch along the axle direction, it is possible to arrange the hub having a relatively small diameter without any problem. Further, by providing a plurality of magnets as the magnetism generating body and arranging these magnets along the axle direction in the same manner as the reed switch, the magnetism (magnetic field) is relatively largely varied and detected. A high-performance vehicle speed detection device can be realized.
　また、前記検出体を樹脂で覆うことにより、ハブの内部に、水や湿気、埃などが侵入することがあっても、車速を良好に検出し続けることができて、信頼性がさらに向上する。 Further, by covering the detection body with resin, even if water, moisture, dust, etc. may intrude into the inside of the hub, the vehicle speed can be continuously detected favorably, and the reliability is further improved. .
　また、前車輪の上方に子乗せ装置が配設されている自転車など、その車輪が２２インチ以下の小径である場合には、駐輪時において、駐輪装置に設けられている車輪止め用のガイドフレームに自転車の車輪を挿入する際に、従来の構造では車速検出装置が破損する確率が高かったが、本発明によれば、このような場合でも車速検出装置が破損することを確実に防止できるので、信頼性が特に向上する利点がある。 In addition, when the wheel has a small diameter of 22 inches or less, such as a bicycle in which a child carrying device is disposed above the front wheel, it is used for a wheel stopper provided in the bicycle parking device at the time of parking. When inserting the wheel of a bicycle into the guide frame, the vehicle speed detection device has a high probability of breakage in the conventional structure, but according to the present invention, the vehicle speed detection device is surely prevented from being damaged even in such a case. As it can, there is an advantage that the reliability is particularly improved.
本発明の実施の形態に係る車速検出装置を備えた電動アシスト自転車の全体側面図Overall side view of an electrically assisted bicycle provided with a vehicle speed detection device according to an embodiment of the present invention 同電動アシスト自転車の車速検出装置（ハブ装置）およびその近傍箇所の縦断面図Longitudinal sectional view of the vehicle speed detection device (hub device) of the same electric power assist bicycle and its vicinity 図２のIII-III線矢視断面図III-III arrow sectional view of FIG. 2 同車速検出装置（ハブ装置）の部分斜視図Partial perspective view of the same vehicle speed detection device (hub device) 本発明の他の実施の形態に係る車速検出装置を備えた電動アシスト自転車の全体側面図An overall side view of an electrically assisted bicycle provided with a vehicle speed detection device according to another embodiment of the present invention 従来の車速検出装置およびその近傍箇所の縦断面図A conventional vehicle speed detection device and a longitudinal sectional view of the vicinity thereof 従来の車速検出装置の課題を示すための斜視図The perspective view for showing the subject of the conventional vehicle speed detection device
　以下、本発明に係る実施の形態を、図面を参照して説明する。なお、この実施の形態では、車速検出装置を備えた自転車の１例として電動アシスト自転車について説明するが、電動アシスト自転車に限るものではなく、各種の自転車にも適用可能である。さらに、この発明の構成が以下で述べる構成に限定されるものではない。また、以下の説明における左右方向および前後方向とは、進行方向に向って当該電動アシスト自転車１に搭乗した状態での方向を言う。 Hereinafter, embodiments according to the present invention will be described with reference to the drawings. In this embodiment, an electrically assisted bicycle will be described as an example of a bicycle provided with a vehicle speed detection device. However, the present invention is not limited to the electrically assisted bicycle, and can be applied to various bicycles. Furthermore, the configuration of the present invention is not limited to the configuration described below. Moreover, the left-right direction and the front-back direction in the following description mean the direction in the state of getting on the motor-assisted bicycle 1 in the traveling direction.
　図１において、１は自転車の１例である電動アシスト自転車である。この電動アシスト自転車１は、車体２と、前車輪３と、後車輪４と、ペダル５の踏力（人力駆動力）を後車輪４に伝達する駆動力伝達体としてのチェーン６と、チェーン６に電動のモータから発生する補助駆動力を付与する電動式の補助駆動装置７と、後述するように前車輪３のハブ２３の内部に配設された車速検出装置８と、車速検出装置８によって検出された車速に応じて補助駆動装置７を制御する制御装置９と、サドル１０と、バッテリ２０等を備えている。なお、バッテリ２０は蓄電器の一例であり、二次電池が好適であるが、蓄電器の他の例としてはキャパシタなどであってもよい。また、この実施の形態では、電動アシスト自転車１が、子供を乗せる子乗せ装置１１も備えている。 In FIG. 1, 1 is an electrically assisted bicycle which is an example of a bicycle. The electrically assisted bicycle 1 includes a vehicle body 2, a front wheel 3, a rear wheel 4, and a chain 6 as a driving force transmission body for transmitting a pedaling force (a manual driving force) of the pedal 5 to the rear wheel 4. Detection is performed by an electric auxiliary drive unit 7 for applying an auxiliary driving force generated from an electric motor, a vehicle speed detection unit 8 disposed inside the hub 23 of the front wheel 3 as described later, and the vehicle speed detection unit 8 A control device 9 that controls the auxiliary drive device 7 according to the determined vehicle speed, a saddle 10, and a battery 20 are provided. The battery 20 is an example of a storage battery and is preferably a secondary battery, but another example of the storage battery may be a capacitor or the like. Further, in this embodiment, the electrically assisted bicycle 1 is also provided with a device 11 for carrying a child.
　車体２は、車体骨格部をなすフレーム体１２と、ハンドル１３などとから構成されており、さらに、フレーム体１２は、ヘッドパイプ１４、前フォーク１５、ダウンパイプ１６、立パイプ１７、バックフォーク１８およびチェーンステー１９等を有している。また、この実施の形態では、子乗せ装置１１が、前車輪３およびヘッドパイプ１４の上方において、二股状に延びるハンドル１３の間に挟まれた状態で配設されている。そして、サドル１０に乗った運転者が、子乗せ装置１１に子供を乗せた場合でも、前方の視界が遮られないようにするために、前車輪３として小径のもの（例えば、２０インチなど２２インチ以下のもの）が用いられている。 The vehicle body 2 is composed of a frame body 12 forming a body frame portion, a handle 13 and the like, and the frame body 12 further includes a head pipe 14, a front fork 15, a down pipe 16, a standing pipe 17 and a back fork 18. And a chain stay 19 and the like. Further, in this embodiment, the child carrier device 11 is disposed above the front wheel 3 and the head pipe 14 so as to be held between the bifurcated handles 13. Then, even when the driver on the saddle 10 places a child on the child carrier 11, the front wheel 3 has a small diameter (for example, 20 inches, etc.) 22 so that the front view is not blocked. Or less) are used.
　図１，図２に示すように、前車輪３は、タイヤ２１と、タイヤ２１の内周に設けられたリム２２と、中心部に設けられて前車輪３のタイヤ２１やリム２２などと一体的に回転するハブ（ハブ体）２３と、前フォーク１５に固定されたハブ軸（車軸）２４と、ハブ２３とリム２２との間に放射状に設けられた複数のスポーク２５とを有している。ハブ２３は左右一対の鍔２３ａを有し、各スポーク２５の内端部が鍔２３ａに係止されている。 As shown in FIGS. 1 and 2, the front wheel 3 is integrated with the tire 21, the rim 22 provided on the inner periphery of the tire 21, and the center portion of the tire 21 and rim 22 of the front wheel 3. A rotating hub (hub body) 23, a hub axle (axle) 24 fixed to the front fork 15, and a plurality of spokes 25 radially provided between the hub 23 and the rim 22; There is. The hub 23 has a pair of left and right hooks 23a, and the inner end of each spoke 25 is locked to the hook 23a.
　図２に示すように、ハブ軸（車軸）２４の両端部は、前フォーク１５の下端部に設けられたフォーク爪１５ａのスリット（図示せず）に挿入されて、ハブ軸（車軸）２４の両端部に螺合されたナット２６（締結部材の一例）によって両フォーク爪１５ａに締結されている。これにより、前車輪３が前フォーク１５に取り付けられている。 As shown in FIG. 2, both ends of the hub axle (axle) 24 are inserted into slits (not shown) of the fork claws 15 a provided at the lower end of the front fork 15, and the hub axle (axle) 24 is Both fork claws 15a are fastened by a nut 26 (an example of a fastening member) screwed to both ends. Thereby, the front wheel 3 is attached to the front fork 15.
　ここで、図２～図４に示すように、車速検出装置８は、磁気を発生する磁気発生体としての磁石（永久磁石）３１と、電動アシスト自転車１の車速を検出するために磁石（永久磁石）３１による磁気変化を検出する検出体としての１つのリードスイッチ３２とを有している。そして、磁石３１は複数設けられ、これらの複数の磁石（永久磁石）３１と、リードスイッチ３２とが、ハブ２３の内部に配設されている。また、ハブ２３は金属製（この実施の形態では、アルミニウム製）とされており、各磁石３１がハブ２３側に固定され、リードスイッチ３２がハブ軸２４側に固定されている。 Here, as shown in FIG. 2 to FIG. 4, the vehicle speed detection device 8 includes a magnet (permanent magnet) 31 as a magnetism generator that generates magnetism, and a magnet (permanent magnet) for detecting the vehicle speed of the motor-assisted bicycle 1. It has one reed switch 32 as a detection body which detects the magnetic change by the magnet 31). A plurality of magnets 31 are provided, and the plurality of magnets (permanent magnets) 31 and the reed switch 32 are disposed inside the hub 23. The hub 23 is made of metal (in this embodiment, made of aluminum), the magnets 31 are fixed to the hub 23 side, and the reed switch 32 is fixed to the hub shaft 24 side.
　ハブ２３および車速検出装置８の構造についてより詳細に述べる。
　ハブ２３は、略円筒形で右側面が開口されたハブ本体２３ｂと、ハブ本体２３ｂの開口部に螺合されたハブ蓋体２３ｃとからなる。そして、ハブ本体２３ｂの左側面内周と、ハブ蓋体２３ｃの内周とに、ハブ２３を回転自在に支持する軸受２７（２７Ａ、２７Ｂ）が車軸方向に対して対となって設けられている。 The structures of the hub 23 and the vehicle speed detection device 8 will be described in more detail.
The hub 23 is composed of a substantially cylindrical hub body 23b having an open right side, and a hub lid 23c screwed into the opening of the hub body 23b. Then, bearings 27 (27A, 27B) for rotatably supporting the hub 23 are provided in pairs in the axle direction on the left side inner periphery of the hub body 23b and the inner periphery of the hub lid 23c. There is.
　また、ハブ軸２４の外周には、それぞれ金属製でハブ軸２４に外側より螺合された左側の第１外筒部３３および右側の第２外筒部３４と、これらの第１外筒部３３、第２外筒部３４により左右から挟持された樹脂製で太径のスイッチ収容体３５と、が組み付けられている。そして、スイッチ収容体３５の外周寄り箇所の一部に、リードスイッチ３２およびスイッチ組付け基板３６がハブ軸２４の車軸方向に沿う向きで配設されている。なお、図４においては、スイッチ収容体３５を省いた状態でリードスイッチ３２およびスイッチ組付け基板３６などを示している。なお、リードスイッチ３２およびスイッチ組付け基板３６は、第１外筒部３３、第２外筒部３４により外周からも覆われている一方、磁気は通す状態で配設されている。また、図示しないが、リードスイッチ３２の電気信号は、第２外筒部３４の外周部に形成された溝部などを通してハブ２３の外部に出された接続配線を通して、制御装置９側に出力されている。 In addition, on the outer periphery of the hub axle 24, a first outer barrel 33 on the left and a second outer sleeve 34 on the right, which are made of metal and are screwed from the outside to the hub axle 24, and the first outer barrels thereof A large diameter switch housing 35 is assembled, which is made of resin and held from the left and right by the second outer cylindrical portion 34. The reed switch 32 and the switch assembly board 36 are disposed in a direction along the axle direction of the hub axle 24 at a part of the switch housing 35 near the outer periphery. In FIG. 4, the reed switch 32, the switch assembly substrate 36 and the like are shown in a state in which the switch housing 35 is omitted. The reed switch 32 and the switch assembly substrate 36 are also covered from the outer periphery by the first outer cylindrical portion 33 and the second outer cylindrical portion 34, while being disposed in a magnetic passing state. Further, although not shown, the electrical signal of the reed switch 32 is output to the control device 9 through the connection wiring taken out of the hub 23 through the groove formed in the outer peripheral part of the second outer cylinder 34 and the like. There is.
　また、第１外筒部３３の左端部外周に左側の軸受２７Ａが組み付けられ、第２外筒部３４の右端部外周に右側の軸受２７Ｂが組み付けられ、これにより、リードスイッチ３２は、ハブ２３の内部における、車軸方向に対して対となった軸受２７（２７Ａ、２７Ｂ）の間の位置に配設されている。また、ハブ２３の車軸方向に対して略中央となる箇所の内側には、左右に２分割されて各磁石３１を左右から保持する樹脂製で略環状の第１、第２の磁石保持部材３７、３８が組み付けられている。そして、ハブ２３が回転する際に、各磁石３１が、スイッチ収容体３５や磁石保持部材３７、３８を通して臨むように、各磁石３１も、左右の軸受２７（２７Ａ、２７Ｂ）の間の位置で、ハブ２３の車軸方向に沿う姿勢で配設されている。なお、各磁石３１は、磁石保持部材３７、３８における周方向に適当間隔をあけて配設されているとともに、図４において簡略的に示すように、隣り合う磁石３１が、その磁界が逆向きとなるように配設されている。 In addition, the left bearing 27A is assembled on the outer periphery of the left end of the first outer cylinder portion 33, and the right bearing 27B is assembled on the outer periphery of the right end of the second outer cylinder portion 34. In the inside, between the paired bearings 27 (27A, 27B) with respect to the axle direction. Further, on the inner side of the hub 23 substantially in the center with respect to the axle direction of the hub 23, the first and second magnet holding members 37 made of resin and divided into right and left to hold the magnets 31 from the left and right are substantially annular. , 38 are assembled. And when the hub 23 rotates, each magnet 31 is also positioned between the left and right bearings 27 (27A, 27B) so that each magnet 31 faces through the switch housing 35 and the magnet holding members 37, 38. , And the hub 23 in a posture along the axle direction. The magnets 31 are arranged at appropriate intervals in the circumferential direction of the magnet holding members 37 and 38, and as schematically shown in FIG. 4, the adjacent magnets 31 have their magnetic fields reverse to each other. It is arranged to be
　上記構成において、ハブ２３はスポーク２５を介して接地面からの力を受けても損傷しないように極めて大きな剛性を有している。そして、上記構成によれば、磁気発生体としての磁石３１や検出体としてのリードスイッチ３２が、極めて大きな剛性を有しているハブ２３の内部に配設されている。これにより、駐輪時などに駐輪装置のガイドフレームに沿って前車輪３を入れる際や、多くの自転車や柱などがある場所に駐輪する際などに、前記ガイドフレームなどがハブ２３の側面などに当接した場合でも、リードスイッチ３２や磁石３１はハブ２３により良好に保護されて破損することが防止される。 In the above configuration, the hub 23 has extremely high rigidity so as not to be damaged even by receiving the force from the ground contact surface via the spokes 25. Then, according to the above configuration, the magnet 31 as the magnetism generator and the reed switch 32 as the detector are disposed inside the hub 23 having extremely high rigidity. As a result, when the front wheel 3 is inserted along the guide frame of the bicycle parking apparatus at the time of bicycle parking, or when parking is performed at a place where there are many bicycles and pillars, etc. Even when the reed switch 32 and the magnet 31 are in contact with a side surface or the like, the reed switch 32 and the magnet 31 are well protected by the hub 23 and prevented from being damaged.
　また、磁石３１やリードスイッチ３２が外部に露出した箇所に配設されないので、磁石３１やリードスイッチ３２が改造されるなど悪戯されることも最小限に抑えられる。この結果、極めて信頼性の高い車速検出装置８を実現できる。また、磁石３１をハブ２３側に固定し、リードスイッチ３２をハブ軸２４側に固定することで、多くの磁石３１をハブ２３の内部における外周寄り領域に配設することができて、車速の検出能力を向上させることが可能となる。 In addition, since the magnet 31 and the reed switch 32 are not disposed at the exposed portion, it is possible to minimize the possibility of tampering with the magnet 31 and the reed switch 32. As a result, a highly reliable vehicle speed detection device 8 can be realized. In addition, by fixing the magnet 31 to the hub 23 side and fixing the reed switch 32 to the hub shaft 24 side, many magnets 31 can be disposed in an area near the outer periphery inside the hub 23, and It is possible to improve the detection capability.
　ところで、磁石などの磁気発生体やリードスイッチなどの検出体が、前記ハブの内部における、車軸方向に対して軸受と同様な位置、すなわち、軸受の外周側などに配設されている場合には、径方向に対して軸受と前記磁気発生体や前記検出体が重なることとなって、構造が複雑化したり、前記ハブが大径化したりする。また、前記ハブの表面部に近いので、風雨に晒されるなどの外部の影響を受けやすい欠点も生じる。 By the way, in the case where a magnetism generating body such as a magnet or a detection body such as a reed switch is disposed at the same position as the bearing in the axle direction inside the hub, that is, on the outer peripheral side of the bearing. The bearing and the magnetism generating body or the detection body overlap in the radial direction, which complicates the structure or increases the diameter of the hub. In addition, since it is close to the surface of the hub, it also has the disadvantage of being susceptible to external influences such as being exposed to wind and rain.
　これに対して、本実施の形態によれば、磁石３１やリードスイッチ３２を、ハブ２３の内部における、車軸方向に対して対となった軸受２７（２７Ａ、２７Ｂ）の間の位置に配設している。これにより、磁石３１やリードスイッチ３２が、径方向に対して軸受２７（２７Ａ、２７Ｂ）と重ならず、車軸方向に対してハブ２３の中心部に寄った位置に配設されることとなるので、構造が複雑化したり、ハブ２３が大径化したりすることがない。したがって、コンパクトでかつ構造が簡単で安価な車速検出装置８を実現できる。また、ハブ２３の内部における軸受２７（２７Ａ、２７Ｂ）より奥側に配設されているので、風雨に晒されるなどの外部の影響もより受け難い。なお、本実施の形態では、軸受２７（２７Ａ、２７Ｂ）はカバー部材４１、４２などにより側方から覆われており、これにより、軸受２７（２７Ａ、２７Ｂ）を通して水や湿気、埃などが側方からハブ２３の内部に侵入することも防止されており、さらに、信頼性の向上が図られている。 On the other hand, according to the present embodiment, the magnet 31 and the reed switch 32 are disposed in the hub 23 at a position between the paired bearings 27 (27A, 27B) in the axle direction. doing. As a result, the magnet 31 and the reed switch 32 do not overlap the bearings 27 (27A, 27B) in the radial direction, and are disposed at a position closer to the center of the hub 23 in the axle direction. Therefore, the structure is not complicated and the hub 23 is not enlarged. Therefore, it is possible to realize the vehicle speed detection device 8 which is compact, simple in structure and inexpensive. In addition, since the hub 23 is disposed further to the back than the bearings 27 (27A, 27B) inside, the hub 23 is less susceptible to external influences such as being exposed to wind and rain. In the present embodiment, the bearings 27 (27A, 27B) are covered from the side by the cover members 41, 42 and the like, whereby water, moisture, dust, etc. are transmitted through the bearings 27 (27A, 27B). Intrusion into the interior of the hub 23 is also prevented, and the reliability is further improved.
　また、検出体としてリードスイッチ３２を用いたり、磁気発生体として、磁石（永久磁石）３１を用いたりすることで、複雑な制御手段などを必要とせずに、極めて簡単で安価な車速検出装置８を実現できる。すなわち、たとえば、磁気発生体として発電可能なダイナモ装置などを用いるとともに、このダイナモ装置からの電圧を測定することが考えられるが、この場合には電圧測定手段や高価な制御手段や比較的高価なダイナモ装置などが必要となる。これに対して、本実施の形態では、安価な磁石（永久磁石）３１やリードスイッチ３２を用いて、車速検出装置８を安価に製造でき、また、構造も極めて簡単である。 Also, by using the reed switch 32 as the detection body or using the magnet (permanent magnet) 31 as the magnetic generation body, the vehicle speed detection device 8 is extremely simple and inexpensive without the need for complicated control means or the like. Can be realized. That is, for example, it is conceivable to use a dynamo device capable of generating electric power as a magnetic generator and to measure the voltage from this dynamo device, but in this case, voltage measuring means, expensive control means and relatively expensive A dynamo device is required. On the other hand, in the present embodiment, the vehicle speed detection device 8 can be manufactured inexpensively using the inexpensive magnet (permanent magnet) 31 and the reed switch 32, and the structure is also extremely simple.
　また、上記構成によれば、リードスイッチ３２を車軸方向に沿って配設しているので、ハブ２３として、比較的小さな径のものにも支障なく配設できる。つまり、リードスイッチを、車軸方向に対して直交する向きに配設しようとすると、ハブとして、比較的大きな径のものが必要となるが、このような不具合を生じることがない。また、磁気発生体として、複数の磁石３１を設け、これらの磁石３１を、リードスイッチ３２と同様に、車軸方向に沿って配設することで、磁気（磁界）が比較的大きく変動して、検出能力の高い車速検出装置８を実現できる。 Further, according to the above configuration, since the reed switch 32 is disposed along the axle direction, it is possible to dispose the hub 23 with a relatively small diameter without any problem. That is, if the reed switch is arranged in a direction perpendicular to the axle direction, a hub having a relatively large diameter is required, but such a problem does not occur. Further, by providing a plurality of magnets 31 as the magnetism generating body and arranging these magnets 31 along the axle direction in the same manner as the reed switch 32, the magnetism (magnetic field) fluctuates relatively large, The vehicle speed detection device 8 with high detection capability can be realized.
　また、上記構成によれば、リードスイッチ３２が樹脂製のスイッチ収容体３５により覆われているので、リードスイッチ３２をさらに良好に保護することができて、万一、ハブ２３の内部に、水や湿気、埃などが侵入することがあっても、車速を良好に検出し続けることができて、良好な信頼性を維持できる。 Further, according to the above configuration, since the reed switch 32 is covered by the switch housing 35 made of resin, the reed switch 32 can be protected better, and water should be contained in the hub 23 in any case. Even if moisture, dust, or the like enters, the vehicle speed can be detected favorably, and good reliability can be maintained.
　また、上記構成によれば、複数の磁石３１を、左右に分割した樹脂製で略環状の第１、第２の磁石保持部材３７、３８により保持させているので、比較的簡単な構成で、複数の磁石３１を周方向に良好に分散させた状態で配設できる利点もある。 Further, according to the above configuration, since the plurality of magnets 31 are held by the first and second substantially magnet holding members 37 and 38 made of resin which is divided into right and left, the configuration is relatively simple. There is also an advantage that the plurality of magnets 31 can be disposed in a state of being well dispersed in the circumferential direction.
　また、この車速検出装置８が設けられる自転車としては、前車輪３の上方に子乗せ装置１１が配設されている自転車１など、その車輪が２２インチ以下の小径である場合に特に適している。しかし、これに限るものではなく、図５に示すように、その車輪４３の直径が２２インチよりも大きな径である種々の自転車４０に場合にも適用可能であることはもちろんである。また、上記実施の形態では、自転車１、４０が電動アシスト自転車の場合を述べたが、これに限るものではなく、車速を測定可能なメータなどを有する自転車などにも適用可能である。また、上記実施の形態では、車速検出装置８が前車輪３のハブ２３に設けられている場合を述べたが、これに限るものではなく、車速検出装置を後車輪のハブに設けてもよい。また、上記実施の形態では、磁気変化を検出する検出体としてリードスイッチを用いた場合を述べたが、これに限るものではなく、検出体としてホール素子（ホールＩＣ）などを用いてもよい。 In addition, as a bicycle provided with the vehicle speed detection device 8, it is particularly suitable when the wheel has a small diameter of 22 inches or less, such as the bicycle 1 in which the child carrier device 11 is disposed above the front wheel 3. . However, the present invention is not limited to this, and as a matter of course, as shown in FIG. 5, the present invention is also applicable to various bicycles 40 in which the diameter of its wheel 43 is larger than 22 inches. Moreover, although the case where the bicycles 1 and 40 were electrically-assisted bicycles was described in the said embodiment, it does not restrict to this, It is applicable also to the bicycle etc. which have a meter etc. which can measure a vehicle speed. In the above embodiment, the vehicle speed detection device 8 is provided on the hub 23 of the front wheel 3. However, the present invention is not limited to this, and the vehicle speed detection device may be provided on the rear wheel hub . Moreover, although the case where a reed switch was used as a detection body which detects a magnetic change was described in the said embodiment, it does not restrict to this, You may use a Hall element (Hall IC) etc. as a detection body.
　本発明は、車速検出装置が設けられる各種の自転車に適用可能である。 The present invention is applicable to various bicycles provided with a vehicle speed detection device.

Claims (12)

  1. 　フレーム体に対して固定されるハブ軸と、車輪の中心部に前記ハブ軸に対して回転自在に設けられて、前記車輪と一体的に回転するハブと、磁気を発生する磁気発生体と、車速を検出するために前記磁気発生体による磁気変化を検出する検出体とを有する自転車の車速検出装置であって、
    前記磁気発生体および前記検出体が前記ハブの内部に配設され、
    前記磁気発生体が前記ハブの側に固定され、
    前記検出体が前記ハブ軸の側に固定されている
    ことを特徴とする自転車の車速検出装置。     A hub shaft fixed to the frame body, a hub rotatably provided at the center of the wheel with respect to the hub shaft and integrally rotating with the wheel, and a magnetism generator generating magnetism; A vehicle speed detection device for a bicycle, comprising: a detection body for detecting a magnetic change due to the magnetism generation body to detect a vehicle speed,
    The magnetism generator and the detector are disposed inside the hub,
    The magnetism generator is fixed to the side of the hub,
    A device for detecting a vehicle speed of a bicycle, wherein the detection body is fixed to the side of the hub axle.
  2. 　ハブが、車軸方向に対して対となった軸受により回転自在に支持され、
    前記磁気発生体および前記検出体が、前記ハブの内部における、車軸方向に対して対となった軸受の間の位置に配設されている
    ことを特徴とする請求項１に記載の自転車の車速検出装置。     The hub is rotatably supported by a pair of bearings in the direction of the axle,
    2. The vehicle speed of a bicycle according to claim 1, wherein the magnetism generating body and the detection body are disposed in the hub at a position between a pair of bearings with respect to an axle direction. Detection device.
  3. 　前記検出体がリードスイッチであることを特徴とする請求項１または２に記載の自転車の車速検出装置。 The bicycle vehicle speed detection device according to claim 1, wherein the detection body is a reed switch.
  4. 　前記リードスイッチが、車軸方向に沿って配設されていることを特徴とする請求項３に記載の自転車の車速検出装置。 The bicycle vehicle speed detection device according to claim 3, wherein the reed switch is disposed along an axle direction.
  5. 　前記磁気発生体が磁石であり、複数設けられ、これらの磁石が、車軸方向に沿って配設されていることを特徴とする請求項４に記載の自転車の車速検出装置。 5. The bicycle vehicle speed detection device according to claim 4, wherein the magnetism generator is a magnet, and a plurality of the magnets are provided along the direction of an axle.
  6. 　隣り合う磁石が、その磁界が逆向きとなるように配設されていることを特徴とする請求項５に記載の自転車の車速検出装置。 The bicycle vehicle speed detection device according to claim 5, wherein the adjacent magnets are disposed such that the magnetic fields are in opposite directions.
  7. 　前記検出体が樹脂で覆われていることを特徴とする請求項１～６の何れか１項に記載の自転車の車速検出装置。 The bicycle vehicle speed detection device according to any one of claims 1 to 6, wherein the detection body is covered with a resin.
  8. 　前記複数の磁石が前記ハブの内側に配設された環状の保持部材により保持され、前記環状の保持部材は車軸方向に対して複数に分割され、各磁石が、分割された保持部材に挟まれた状態で保持されていることを特徴とする請求項５または６に記載の自転車の車速検出装置。 The plurality of magnets are held by an annular holding member disposed inside the hub, the annular holding member is divided into a plurality of parts with respect to the axle direction, and each magnet is sandwiched by the divided holding members. The bicycle vehicle speed detection device according to claim 5 or 6, wherein the vehicle speed detection device is held in a closed state.
  9. 前記請求項１～８の何れか１項に記載の車速検出装置を備えたことを特徴とする自転車。 A bicycle comprising the vehicle speed detection device according to any one of claims 1 to 8.
  10. 車速検出装置が設けられている車輪が２２インチ以下の小径であることを特徴とする請求項９に記載の自転車。 The bicycle according to claim 9, characterized in that the wheel provided with the vehicle speed detection device has a small diameter of 22 inches or less.
  11. 前車輪の上方に子乗せ装置が配設されていることを特徴とする請求項９または１０に記載の自転車。 The bicycle according to claim 9 or 10, wherein a child carrier device is disposed above the front wheel.
  12. 前記自転車が、ペダルからの踏力による人力駆動力に、モータにより発生する補助駆動力を加えて走行可能である電動アシスト自転車であることを特徴とする請求項９～１１の何れか１項に記載の自転車。 The electric bicycle according to any one of claims 9 to 11, wherein the bicycle is an electrically assisted bicycle that can travel by adding an auxiliary driving force generated by a motor to a manual driving force by a pedaling force from a pedal. Bicycle.
PCT/JP2014/002375 2013-09-05 2014-04-30 Bicycle speed detection device, and bicycle WO2015033492A1 (en)

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JP2015535288A JPWO2015033492A1 (en) 2013-09-05 2014-04-30 Bicycle vehicle speed detection device and bicycle
CN201480045473.1A CN105473436B (en) 2013-09-05 2014-04-30 The vehicle speed detector device and bicycle of bicycle

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