JP2001213382A - Power-assisted bicycle - Google Patents
Power-assisted bicycleInfo
- Publication number
- JP2001213382A JP2001213382A JP2000021646A JP2000021646A JP2001213382A JP 2001213382 A JP2001213382 A JP 2001213382A JP 2000021646 A JP2000021646 A JP 2000021646A JP 2000021646 A JP2000021646 A JP 2000021646A JP 2001213382 A JP2001213382 A JP 2001213382A
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- Japan
- Prior art keywords
- pedal
- drive unit
- bicycle
- auxiliary power
- gear
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000001514 detection method Methods 0.000 claims abstract description 11
- 238000000034 method Methods 0.000 abstract description 11
- 230000000737 periodic effect Effects 0.000 abstract description 4
- 239000000126 substance Substances 0.000 abstract 1
- 230000001360 synchronised effect Effects 0.000 abstract 1
- 239000003638 chemical reducing agent Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 239000000758 substrate Substances 0.000 description 3
- 239000004020 conductor Substances 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 230000000994 depressogenic effect Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
Landscapes
- Electric Propulsion And Braking For Vehicles (AREA)
- Automatic Cycles, And Cycles In General (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は人力と補助動力を用
いて駆動する補助動力付き自転車に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bicycle with auxiliary power which is driven using human power and auxiliary power.
【０００２】[0002]
【従来の技術】補助動力付き自転車は、人力によるペダ
ルトルクを検出し、そのトルクに応じた補助動力である
モータを駆動するもので、具体的には、その一例が特開
平９−２７７９７８号公報に開示されている。この実施
例を図５に示すが、ペダルトルク検出をいわゆる遊星歯
車の反力から電気信号に変換し内蔵制御回路に入力し、
所定の補助率となるようモータを駆動するものである。2. Description of the Related Art A bicycle with auxiliary power detects a pedal torque by human power and drives a motor which is an auxiliary power according to the torque. Specifically, an example of the bicycle is disclosed in Japanese Patent Application Laid-Open No. 9-277978. Is disclosed. FIG. 5 shows this embodiment. The pedal torque detection is converted from a so-called planetary gear reaction force into an electric signal and input to a built-in control circuit.
The motor is driven so as to have a predetermined auxiliary rate.
【０００３】さらに詳しくは、ペダルの負荷はクランク
軸４に伝達され、前記クランク軸にあるワンウェークラ
ッチ１７を介して遊星歯車１８に伝達され、さらに前記
遊星歯車は、太陽歯車１９を基準にインターナル歯車２
０に伝達し、インターナル歯車と一体的に結合されてい
るスプロケット１１を介して出力される。このとき前記
太陽歯車はバネ２１および支持機構２２により支持され
ていて、前記ペダルトルクの反力に応じて前記支持機構
が動き支持機構に連結されているポテンショメータ２３
が作動し、電気信号として制御部２４へペダルトルクを
伝達する。More specifically, the pedal load is transmitted to a crankshaft 4 and transmitted to a planetary gear 18 via a one-way clutch 17 on the crankshaft. Gear 2
0 and is output via a sprocket 11 integrally connected to the internal gear. At this time, the sun gear is supported by a spring 21 and a support mechanism 22, and the support mechanism moves according to the reaction force of the pedal torque, and the potentiometer 23 is connected to the support mechanism.
Operates to transmit pedal torque to the control unit 24 as an electric signal.
【０００４】一方、インターナル歯車に一体的に形成さ
れている人力とモータ力を合力する歯車２５の刃先の凹
凸を磁気的ギャップ変化として磁気検出器２６でセンシ
ングし、この変化の速度がペダル回転速度にリンクして
いるので、これをペダル回転速度として前記制御部は認
識する。これらの情報により制御部は補助動力であるモ
ータの運転条件を決定する。On the other hand, the unevenness of the cutting edge of the gear 25 which combines the human power and the motor power integrally formed on the internal gear is sensed by the magnetic detector 26 as a magnetic gap change, and the speed of this change is determined by the pedal rotation. Since the speed is linked, the control unit recognizes this as the pedal rotation speed. The control unit determines the operating condition of the motor, which is the auxiliary power, based on the information.
【０００５】モータ力は３段の減速歯車２７を介して、
前記インターナル歯車２０に一体的に形成されている歯
車２５を介してペダル入力と合力され、前記スプロケッ
ト１１からチェーンを介して後輪に伝達され、自転車を
駆動する。この方法では、車速測定のため、高価な磁気
ギャップセンサーが必要であり、前記ペダル回転速度検
出器を省略し、ペダル踏み力の周期的変化からペダル回
転速度を類推する方法が考えられた。[0005] The motor power is transmitted through a three-stage reduction gear 27,
The resultant is combined with a pedal input via a gear 25 integrally formed with the internal gear 20, and is transmitted from the sprocket 11 to a rear wheel via a chain to drive the bicycle. In this method, an expensive magnetic gap sensor is required for measuring the vehicle speed, and a method has been considered in which the pedal rotation speed detector is omitted and the pedal rotation speed is inferred from a periodic change in pedal depression force.
【０００６】[0006]
【発明が解決しようとする課題】トルク検出手段の周期
的トルク変化からペダルの回転速度を類推する方法で
は、ペダル１回転当たりトルクの周期的変化は２回とな
る。これはいかなるトルク検出手段においても自転車で
ある以上同等である。しかし、自転車の走行時の振動な
どの外乱があるため、個別の周期変化を速度として見な
すと速度変化が頻繁となり乗り心地を阻害するので複数
の周期を平均化して速度と見なす必要がある。In the method of estimating the rotation speed of the pedal from the periodic torque change of the torque detecting means, the periodic change of the torque per pedal rotation is twice. This is the same in any torque detecting means as long as it is a bicycle. However, since there are disturbances such as vibrations during the running of the bicycle, if individual cycle changes are regarded as speeds, the speed changes frequently and the ride comfort is impaired. Therefore, it is necessary to average a plurality of cycles and consider the speed.
【０００７】ところが、一方、通常自転車としての規制
内で運転する必要から、さらには、省エネルギーの観点
から、モータを駆動、停止をペダルトルクや車速により
適切に行う場合、車速の決め方に課題が発生し、補助動
力を駆動する、あるいは停止するタイミングが遅れ不具
合が発生する。[0007] On the other hand, when the motor is required to be driven within the regulation as a normal bicycle and from the viewpoint of energy saving, when the motor is driven and stopped appropriately by the pedal torque or the vehicle speed, a problem arises in how to determine the vehicle speed. However, the timing of driving or stopping the auxiliary power is delayed, and a malfunction occurs.
【０００８】ペダルの回転速度を検出する方法として
は、前記実施例に記載されている人力と電動駆動部力を
合力する減速機の歯車の刃の凹凸を磁気的検出器により
検出する方法がある。この方法では常時ペダルの回転速
度を検出することが可能であり前記課題の解決が可能で
あるが、一方高価な磁気的検出器が不可欠であり、さら
に前記磁気的検出器のハーネスの処理がやっかいであ
る。また、この従来例では、駆動部の質量が重く、補助
動力付き自転車の質量増を招き、さらにペダルトルク検
出手段として遊星歯車を採用しているため、この検出手
段による機械的損失が発生、補助動力非作動時にはペダ
ルが重く、扱いにくいものとなっている。As a method for detecting the rotational speed of the pedal, there is a method described in the above-mentioned embodiment, in which the magnetic sensor detects the unevenness of the blade of the gear of the speed reducer which combines the power of the human and the power of the electric drive unit. . This method can always detect the rotation speed of the pedal and can solve the above-mentioned problem, but on the other hand, an expensive magnetic detector is indispensable, and the processing of the harness of the magnetic detector is troublesome. It is. Further, in this conventional example, the mass of the driving unit is heavy, which causes an increase in the mass of the bicycle with auxiliary power, and further, since a planetary gear is adopted as the pedal torque detecting means, mechanical loss occurs due to this detecting means, When the power is not working, the pedals are heavy and difficult to handle.
【０００９】その解決策として非接触式のトルク検出器
をペダルに直結されたクランク軸に構成し、さらに補助
動力の出力と、前記ペダル駆動部出力のスプロケットを
それぞれ個別に設け１本のチェーンにより後輪へ伝達す
る方法が提案されている。この方法では補助動力非作動
時ペダルが重くなることはなく、快適なペダリングが実
現できるが、ペダル回転速度の検出においては、前述の
従来例と同じであり、本質的に快適な乗り心地、低価格
で実現するものにはなっていない。As a solution, a non-contact type torque detector is formed on a crankshaft directly connected to a pedal. Further, an output of an auxiliary power and a sprocket of an output of the pedal drive unit are separately provided and one chain is used. A method of transmitting to the rear wheel has been proposed. With this method, the pedal does not become heavy when the auxiliary power is not actuated, and comfortable pedaling can be realized. However, the detection of the pedal rotation speed is the same as the above-described conventional example. It has not been realized at a price.
【００１０】[0010]
【課題を解決するための手段】本発明の補助動力付き自
転車の駆動部の人力のための第１のスプロケットと補助
動力のための第２のスプロケットを有し、前記２ヶのス
プロケットが１本のチェーンで連結されていて、第２の
スプロケットに連結されている歯車に回転速度検出手段
を設け、さらに、駆動部制御回路に一体的に検出回路を
構成することで実現する。SUMMARY OF THE INVENTION A drive unit of a bicycle with auxiliary power according to the present invention has a first sprocket for human power and a second sprocket for auxiliary power, wherein the two sprockets are one. The rotation speed detecting means is provided on a gear connected to the second sprocket, and the detection circuit is formed integrally with the drive unit control circuit.
【００１１】[0011]
【発明の実施の形態】図１は本発明の補助動力付き自転
車の実施例である。ペダルトルク検出器、モータ、減速
機、制御回路が一体的に組み込まれた駆動部１は自転車
フレーム２の中央下部にあり、モータ駆動エネルギー源
である電池３とは電気的に接続されている。自転車フレ
ームに駆動部は２本のネジで取り付けられている。図２
に前記駆動部の構造図を示す。クランク軸４の両端には
ペダルアームを介してペダルがあり（図示せず）、前記
クランク軸に嵌合したトルク検出手段５があり、ペダル
を人力により踏むと、その負荷により前記トルク検出手
段が検出し、制御部６へペダルトルクの信号として送
る。FIG. 1 shows an embodiment of a bicycle with auxiliary power according to the present invention. A drive unit 1 in which a pedal torque detector, a motor, a speed reducer, and a control circuit are integrally incorporated is provided at a lower center portion of the bicycle frame 2 and is electrically connected to a battery 3 serving as a motor drive energy source. The drive is attached to the bicycle frame with two screws. FIG.
2 shows a structural diagram of the driving unit. At both ends of the crankshaft 4, there are pedals (not shown) via pedal arms, and there is a torque detecting means 5 fitted to the crankshaft. When the pedal is manually depressed, the torque detecting means is turned on by the load. Detected and sent to the controller 6 as a pedal torque signal.
【００１２】本発明の実施例では、非接触式トルク検出
手段として磁歪式を採用しているが、本発明の趣旨から
軽量であれば他の検出手段を採用してもかまわない。一
方補助動力用モータ７、出力用第２のスプロケット８に
連結され前記補助動力用モータ力を減速して出力する減
速機を構成する第２の歯車９の側面にある永久磁石１０
の回転速度を前記制御部に一体的に構成されている検出
回路が回転速度を検出し、前記トルクおよび回転速度の
情報により補助動力用モータ７を作動させ２段の減速歯
車を介して前記第１のスプロケット１１と同一平面上に
配置されている第２のスプロケット８から、人力を出力
する第１のスプロケットと後輪スプロケット間にあるチ
ェーン（図示せず）にモータ力を伝達する。In the embodiment of the present invention, a magnetostrictive type is adopted as the non-contact type torque detecting means. However, other detecting means may be employed as long as it is lightweight for the purpose of the present invention. On the other hand, a permanent magnet 10 on a side surface of a second gear 9 which is connected to an auxiliary power motor 7 and a second output sprocket 8 and constitutes a speed reducer for reducing and outputting the power of the auxiliary power motor.
A detection circuit integrated with the control unit detects the rotation speed of the motor, detects the rotation speed, activates the auxiliary power motor 7 based on the information on the torque and the rotation speed, and drives the second power reduction gear via a two-stage reduction gear. The motor power is transmitted from the second sprocket 8 disposed on the same plane as the first sprocket 11 to a chain (not shown) between the first sprocket that outputs human power and the rear wheel sprocket.
【００１３】制御部に構成された回転速度検出回路と前
記歯車に構成された永久磁石の構成の詳細を図３に示
す。制御部基板１２はその先端部１３にホール素子を含
む回転速度検出回路が構成され、基板上で電動駆動部制
御回路と電気的に接続されている。この接続は基板上の
導体によりパターン化されていて、新たなハーネスの必
要がないのみならず、ハーネスがアンテナとなる外乱ノ
イズによるトラブルの防止に効果的である。FIG. 3 shows the details of the configuration of the rotation speed detection circuit provided in the control section and the permanent magnet provided in the gear. The control unit substrate 12 has a rotation speed detection circuit including a Hall element at its tip 13 and is electrically connected to the electric drive unit control circuit on the substrate. This connection is patterned by conductors on the substrate, and not only does not require a new harness, but is also effective in preventing troubles due to disturbance noise in which the harness serves as an antenna.
【００１４】この回転速度検出回路を含む制御部基板
は、駆動部ケーシング１４に組み立てられ、樹脂１５に
よりモールドされ振動や、ほこり、湿気に対して十分な
体力を保持できるように構成されている。永久磁石１０
を有する第２の歯車９は適切なギャップを保持しつつ、
前記回転検出回路上を回転子、前記検出回路がその回転
速度を検出する。The control board including the rotation speed detecting circuit is assembled to the drive casing 14 and molded with a resin 15 so as to maintain sufficient physical strength against vibration, dust and moisture. Permanent magnet 10
While maintaining a suitable gap,
A rotor is provided on the rotation detection circuit, and the detection circuit detects the rotation speed.
【００１５】図４に回転検出手段を有する第２の歯車の
詳細図を示す。第２の歯車の側面１６には円筒形状の永
久磁石１０が歯車軸中心に対して、均等角度で４ヶあ
り、それぞれ＋、−が交互に配置されている。この永久
磁石は、＋、−１対で配置され、その対数は少なくとも
１対で、第１のスプロケットと第２のスプロケットの歯
数の比に応じてペダル１回転の分解能として必要とされ
る数を選定すればよいが、本実施例では、前記スプロケ
ットの歯数比が約２．５であり、自転車の乗り心地から
要求されるペダル１回転の分解能は１／１０以上である
ことが好ましいので、２対の磁石、４ヶで構成した。FIG. 4 is a detailed view of the second gear having the rotation detecting means. On the side surface 16 of the second gear, there are four cylindrical permanent magnets 10 at an equal angle with respect to the center of the gear shaft, and + and-are alternately arranged. The permanent magnets are arranged in +, -1 pairs, the number of which is at least one pair, and the number required as the resolution of one revolution of the pedal according to the ratio of the number of teeth of the first sprocket and the number of teeth of the second sprocket. In this embodiment, it is preferable that the ratio of the number of teeth of the sprocket is about 2.5 and the resolution of one rotation of the pedal required from the riding comfort of the bicycle is 1/10 or more. It consisted of two pairs of magnets and four magnets.
【００１６】なお、前記磁石は環状のものに＋、−を１
対として複数対着磁したものを用いてもよい。一方この
磁石の回転速度を検出する回路は、本発明の速度検出法
は、同じ磁気式ながら、歯車の刃先の凹凸を磁気的ギャ
ップの変化として専用検出器で測定する従来例と異な
り、市場で容易に入手でき、安価な電気部材で構成され
質量増やコスト上昇を招かない。本発明では、補助動力
である電動機が規制速度以上の車速や、ペダル負荷が軽
い場合随時電動機を停止するが、その場合でもペダルを
踏んでいるときは、第２のスプロケットは、チェーンを
介してペダルと同期して回転し、これに直結されている
歯車も回転しているので、常時ペダル回転速度を検出で
きるので、第１スプロケットに連結されているペダルト
ルク検出器の情報と併せて適切な補助動力の制御が実現
でき、快適で、軽量で、取り扱いやすい補助動力付き自
転車を実現する。In addition, the magnet is formed in a ring shape by adding + and-to each other.
A plurality of pairs may be magnetized. On the other hand, the circuit for detecting the rotation speed of this magnet is different from the conventional example in which the speed detection method of the present invention uses the same magnetic method but measures the unevenness of the cutting edge of the gear as a change in the magnetic gap with a dedicated detector. It is easily available, is made of inexpensive electric members, and does not cause an increase in mass or cost. In the present invention, when the electric motor serving as the auxiliary power is at a vehicle speed equal to or higher than the regulated speed or the pedal load is light, the electric motor is stopped at any time. Since it rotates in synchronization with the pedal and the gear directly connected thereto also rotates, the pedal rotation speed can always be detected, so that an appropriate value can be obtained together with the information of the pedal torque detector connected to the first sprocket. Auxiliary power control can be realized to realize a comfortable, lightweight and easy-to-handle auxiliary powered bicycle.
【００１７】[0017]
【発明の効果】以上のように本発明の補助動力付き自転
車では、安価な電気部材により、ペダル回転速度を検出
し、適切な補助動力の運転制御が実現し、快適で、軽量
で、取り扱いのしやすい補助動力付き自転車を実現でき
る。As described above, in the bicycle with auxiliary power according to the present invention, the rotation speed of the pedal is detected by an inexpensive electric member, and the driving control of the appropriate auxiliary power is realized. A bicycle with auxiliary power that is easy to operate can be realized.
【図１】本発明の補助動力付き自転車の第１の実施例の
側面図FIG. 1 is a side view of a first embodiment of a bicycle with auxiliary power according to the present invention.
【図２】本発明の実施例の電動駆動部の構造図FIG. 2 is a structural diagram of an electric drive unit according to an embodiment of the present invention.
【図３】本発明の速度検出手段の実施例の詳細構造図FIG. 3 is a detailed structural diagram of an embodiment of the speed detecting means of the present invention.
【図４】（ａ）回転速度検出手段を有する歯車の断面図 （ｂ）同歯車の正面図FIG. 4A is a cross-sectional view of a gear having rotation speed detecting means. FIG. 4B is a front view of the gear.
【図５】（ａ）従来の電動駆動部の断面図 （ｂ）同側面図5A is a cross-sectional view of a conventional electric drive unit, and FIG.
１ 駆動部 ２ 自転車フレーム ３ 電池 DESCRIPTION OF SYMBOLS 1 Drive part 2 Bicycle frame 3 Battery
フロントページの続き (72)発明者 山本 敏夫 大阪府門真市大字門真1006番地 松下電器 産業株式会社内 (72)発明者 宮脇 俊治 大阪府門真市大字門真1006番地 松下電器 産業株式会社内 (72)発明者 松尾 亮 大阪府門真市大字門真1006番地 松下電器 産業株式会社内Continued on the front page (72) Inventor Toshio Yamamoto 1006 Kazuma Kadoma, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. (72) Inventor Shunji Miyawaki 1006 Oji Kadoma Kadoma City, Osaka Matsushita Electric Industrial Co., Ltd. (72) Invention Person Ryo Matsuo 1006 Kadoma Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd.
Claims (4)
駆動部単独または人力駆動部と電動駆動部を同時に作動
させることが可能で、人力駆動部のペダルクランク軸に
第１のスプロケットを、電動駆動部の出力軸に第２のス
プロケットを有し、１本のチェーンで後輪のスプロケッ
トに連結されている補助動力付き自転車において、第２
のスプロケットに連結された電動駆動部に内蔵されてい
る歯車に回転速度検出手段が付加されていることを特徴
とする補助動力付き自転車。1. A human-powered drive unit and an electric-powered drive unit are provided side by side, and the human-powered drive unit alone or the human-powered drive unit and the electric-powered drive unit can be operated simultaneously, and the first sprocket is mounted on the pedal crankshaft of the human-powered drive unit. An auxiliary powered bicycle having a second sprocket on an output shaft of an electric drive unit and connected to a rear wheel sprocket by a single chain.
A bicycle with auxiliary power, characterized in that a rotation speed detecting means is added to a gear built in an electric drive unit connected to the sprocket.
特徴とする請求項１記載の補助動力付き自転車。2. The bicycle with auxiliary power according to claim 1, wherein the rotation speed detecting means is a magnetic type.
とを特徴とする請求項１記載の補助動力付き自転車。3. The bicycle with auxiliary power according to claim 1, wherein a permanent magnet is disposed on a side surface of the gear.
御回路と一体的に形成されていることを特徴とする請求
項１、２または３記載の補助動力付き自転車。4. The bicycle with auxiliary power according to claim 1, wherein the magnet rotation speed detection circuit is formed integrally with the electric drive unit control circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000021646A JP2001213382A (en) | 2000-01-31 | 2000-01-31 | Power-assisted bicycle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000021646A JP2001213382A (en) | 2000-01-31 | 2000-01-31 | Power-assisted bicycle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2001213382A true JP2001213382A (en) | 2001-08-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2000021646A Pending JP2001213382A (en) | 2000-01-31 | 2000-01-31 | Power-assisted bicycle |
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| Country | Link |
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| JP (1) | JP2001213382A (en) |
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2000
- 2000-01-31 JP JP2000021646A patent/JP2001213382A/en active Pending
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