JP4244127B2 - Brake device for electric motorcycle - Google Patents

Brake device for electric motorcycle Download PDF

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Publication number
JP4244127B2
JP4244127B2 JP2002289349A JP2002289349A JP4244127B2 JP 4244127 B2 JP4244127 B2 JP 4244127B2 JP 2002289349 A JP2002289349 A JP 2002289349A JP 2002289349 A JP2002289349 A JP 2002289349A JP 4244127 B2 JP4244127 B2 JP 4244127B2
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Prior art keywords
electric motor
brake
rear arm
electric motorcycle
electric
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Expired - Fee Related
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JP2002289349A
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JP2003191882A (en
Inventor
潤史 寺田
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Yamaha Motor Co Ltd
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Yamaha Motor Co Ltd
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Priority to JP2002289349A priority Critical patent/JP4244127B2/en
Priority to TW091123438A priority patent/TW555668B/en
Priority to CNB021465053A priority patent/CN1274976C/en
Publication of JP2003191882A publication Critical patent/JP2003191882A/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62L—BRAKES SPECIALLY ADAPTED FOR CYCLES
    • B62L1/00—Brakes; Arrangements thereof
    • B62L1/005—Brakes; Arrangements thereof constructional features of brake elements, e.g. fastening of brake blocks in their holders
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L50/00—Electric propulsion with power supplied within the vehicle
    • B60L50/50—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells
    • B60L50/60—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells using power supplied by batteries
    • B60L50/66—Arrangements of batteries
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
    • B60L53/80—Exchanging energy storage elements, e.g. removable batteries
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62L—BRAKES SPECIALLY ADAPTED FOR CYCLES
    • B62L1/00—Brakes; Arrangements thereof
    • B62L1/02—Brakes; Arrangements thereof in which cycle wheels are engaged by brake elements
    • B62L1/06—Brakes; Arrangements thereof in which cycle wheels are engaged by brake elements the wheel rim being engaged
    • B62L1/08—Brakes; Arrangements thereof in which cycle wheels are engaged by brake elements the wheel rim being engaged by the elements moving radially relative to the wheel
    • 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
    • B62M7/00—Motorcycles characterised by position of motor or engine
    • B62M7/12—Motorcycles characterised by position of motor or engine with the engine beside or within the driven wheel
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L2200/00—Type of vehicles
    • B60L2200/12—Bikes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L2220/00—Electrical machine types; Structures or applications thereof
    • B60L2220/40—Electrical machine applications
    • B60L2220/44—Wheel Hub motors, i.e. integrated in the wheel hub
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L2250/00—Driver interactions
    • B60L2250/24—Driver interactions by lever actuation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62J—CYCLE SADDLES OR SEATS; AUXILIARY DEVICES OR ACCESSORIES SPECIALLY ADAPTED TO CYCLES AND NOT OTHERWISE PROVIDED FOR, e.g. ARTICLE CARRIERS OR CYCLE PROTECTORS
    • B62J43/00—Arrangements of batteries
    • B62J43/10—Arrangements of batteries for propulsion
    • B62J43/16—Arrangements of batteries for propulsion on motorcycles or the like
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62K—CYCLES; CYCLE FRAMES; CYCLE STEERING DEVICES; RIDER-OPERATED TERMINAL CONTROLS SPECIALLY ADAPTED FOR CYCLES; CYCLE AXLE SUSPENSIONS; CYCLE SIDE-CARS, FORECARS, OR THE LIKE
    • B62K2202/00—Motorised scooters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62K—CYCLES; CYCLE FRAMES; CYCLE STEERING DEVICES; RIDER-OPERATED TERMINAL CONTROLS SPECIALLY ADAPTED FOR CYCLES; CYCLE AXLE SUSPENSIONS; CYCLE SIDE-CARS, FORECARS, OR THE LIKE
    • B62K2204/00—Adaptations for driving cycles by electric motor
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/70—Energy storage systems for electromobility, e.g. batteries
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Transportation (AREA)
  • Power Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Braking Arrangements (AREA)
  • Arrangement Or Mounting Of Propulsion Units For Vehicles (AREA)
  • Automatic Cycles, And Cycles In General (AREA)

Description

【０００１】
【発明の属する技術分野】
本発明は、電動モータを駆動源として走行する電動二輪車の制動装置に関する。
【０００２】
【従来の技術】
従来、自動二輪車はエンジンを駆動源とするものが主流を占めているが、環境保護等の観点から電動モータを駆動源として走行する電動二輪車が開発されるに至っている。
【０００３】
斯かる電動二輪車として、電動モータと該電動モータの回転を減速して後車軸に伝達する減速機を含んで構成される電動パワーユニットをリヤアーム内に組み込み、リヤアームの後部から外側方に突出する前記後車軸の端部に後輪を取り付けて成るものが提案されている。
【０００４】
【発明が解決しようとする課題】
ところで、上記電動二輪車の制動装置としてドラム式ブレーキを採用する場合、その配置と駆動系の構成が問題となる。特に、電動パワーユニットをリヤアーム内に組み込み、リヤアームの後部から外側方に突出する後車軸の端部に後輪を取り付けて成る電動二輪車においては、ドラム式ブレーキのカムの左右には後輪と電動モータのロータ等の回転部材が配置されるため、従来のようにドラム式ブレーキのカム軸にカムレバーを直結する構成を採用することができない。
【０００５】
本発明は上記問題に鑑みてなされたもので、その目的とする処は、電動パワーユニットをリヤアーム内に組み込み、リヤアームの後部から外側方に突出する後車軸の端部に後輪を取り付けて成る電動二輪車に対してドラム式ブレーキを採用してこれをコンパクトに配置することができる電動二輪車の制動装置を提供することにある。
【０００６】
【課題を解決するための手段】
上記目的を達成するため、請求項１記載の発明は、電動モータと該電動モータの回転を減速して後車軸に伝達する減速機を含んで構成される電動パワーユニットをリヤアーム内に組み込み、リヤアームの後部から外側方に突出する前記後車軸の端部に後輪を取り付けて成る電動二輪車において、前記後車軸は、前記電動モータの回転軸の延伸方向に並ぶよう配置され、前記後輪のホイール内面と前記リヤアームとの間に形成される空間に前記電動モータよりも小径のドラム式ブレーキを配置するとともに、該ドラム式ブレーキのカム軸を前記電動モータの外径の内側において、カムレバー軸を前記電動モータの外径の外側において、それぞれ前記電動モータの回転軸に平行に配置し、前記カム軸と前記カムレバー軸を後車軸の径方向にオフセットして前記リヤアームに回動可能に取り付け、両者を回転伝達手段にて連結したことを特徴とする。
【０００７】
請求項２記載の発明は、請求項１記載の発明において、前記回転伝達手段を前記リヤアーム内に配された一対のセクタギヤで構成するとともに、少なくとも一方のセクタギヤを回転部材との干渉を避けて屈曲成形したことを特徴とする。
【０００８】
請求項３記載の発明は、請求項１記載の発明において、前記回転伝達手段をリンク機構で構成したことを特徴とする。
【０００９】
請求項４記載の発明は、請求項３記載の発明において、前記リンク機構の最下端部を前記リヤアームの後端部下縁よりも上側に配置したことを特徴とする。
【００１０】
請求項５記載の発明は、請求項４記載の発明において、後輪をその上方から覆うリヤフェンダを前記リヤアームに取り付けるとともに、該リヤフェンダによって前記リンク機構の少なくとも一部をその外方から覆ったことを特徴とする。
【００１１】
従って、請求項１〜３記載の発明によれば、後輪のホイール内面とリヤアームとの間に形成される空間を利用してドラム式ブレーキをコンパクトに配置することができる。又、ドラム式ブレーキのカム軸とカムレバー軸を車体前後方向にオフセットしてリヤアームに回動可能に取り付け、両者をギヤにて連結したため、制動操作によるカムレバーの回動をカムレバー軸とギヤを経てカム軸に伝達することができ、カム軸と一体のカムを回動させてドラム式ブレーキを作動させることができ、電動パワーユニットをリヤアーム内に組み込んで成る電動二輪車に対してドラム式ブレーキを採用することができる。
【００１２】
請求項４記載の発明によれば、リンク機構の最下端部をリヤアームの後端部下縁よりも上側に配置したため、電動二輪車の走行中において、ドラム式ブレーキの突出部であるリンク機構が走行路面上の何らかの物体に衝突しようとしても、これに先立って、リヤアームの後端部下縁が前記物体に衝突し、それ以上にリンク機構が物体に衝突することがないため、リンク機構が損傷から有効に保護される。
【００１３】
請求項５記載の発明によれば、リヤフェンダによってリンク機構の少なくとも一部をその外方から覆ったため、外観的に見え易い高い位置に配置されたリンク機構が外部に露出することがなく、電動二輪車の外観性が良好に保たれる。
【００１４】
【発明の実施の形態】
以下に本発明の実施の形態を添付図面に基づいて説明する。
【００１５】
＜実施の形態１＞
図１は本発明に係る電動二輪車の側面図、図２はバッテリ脱着時の状態を示す電動二輪車後部の破断側面図、図３は同電動二輪車のバッテリ部分のシートを取り除いた状態の部分平面図である。
【００１６】
図１に示す電動二輪車１は、その車体前方上部にヘッドパイプ２を備え、該ヘッドパイプ２内には不図示のステアリング軸が回動自在に挿通している。そして、このステアリング軸の上端にはアッパーブラケット３が、下端にはアンダーブラケット４がそれぞれ取り付けられており、アッパーブラケット３にはハンドル５が取り付けられている。そして、ハンドル５の両端にはグリップ６が取り付けられており、左側のグリップ６の近傍にはブレーキレバー７が設けられており、不図示の右側（図１の奥側）のグリップ６は回動可能なスロットルグリップを構成している。
【００１７】
又、前記アッパーブラケット３とアンダーブラケット４にはフロントフォーク８の上部が取り付けられており、該フロントフォーク８の下端には前輪９が前車軸１０によって回転自在に軸支されている。尚、前記ハンドル５の前方のアッパーブラケット３上にはメータ１１が配置され、該メータ１１の下方には、前記フロントフォーク８の上部に固定されたヘッドランプ１２が配され、その両側方にはフラッシャランプ１３（図１には一方のみ図示）がそれぞれ設けられている。
【００１８】
他方、前記ヘッドパイプ２からは側面視Ｕ字状を成す左右一対の車体フレーム１４が車体後方に向かって延設されている。即ち、丸パイプ状の車体フレーム１４は、ヘッドパイプ２から車体後方に向かって斜め下方に延びた後、後方に向かって円弧状に曲げられて車体後方に略水平に延びた後、上方に向かって円弧状に折り曲げられて車体後方に向かって斜め上方に立ち上がって側面視Ｕ字状を成している。そして、車体フレーム１４の後端部１４ａは、シート１５の形状に沿って屈曲され、左右の後端部１４ａ同士は連続した１つのパイプを構成している。
【００１９】
ところで、上記左右の車体フレーム１４の後部近傍には、逆Ｕ字状を成すシートステー１６（図３参照）が車体前方に向かって斜め上方に傾斜して溶着されており、このシートステー１６と左右の車体フレーム１４で囲まれる部分には前記シート１５が開閉可能に配置されている。即ち、図２に示すように、前記シートステー１６の前端水平部にはヒンジ１７によってシート１５の前端部が上下に回動可能に支持されており、該シート１５のボトムプレート１５ａの下面にはクッション材１８が取り付けられている。
【００２０】
そして、車体フレーム１４側には、シート１５を支持するシートステー１９とシート１５を閉じ状態に固定ロックするための不図示のロック機構が設けられている。ここで、車体フレーム１４の後端に取り付けられたリヤフェンダ２０の後面にはテイルランプ２１が取り付けられており、その左右にはフラッシャランプ２２（図１及び図２には一方のみ図示）が配されている。
【００２１】
一方、左右の車体フレーム１４のシート１５下方の屈曲部にはリヤアームブラケット２３（図１及び図２には一方のみ図示）がそれぞれ溶着されており、左右一対のリヤアームブラケット２３には、リヤアーム２４の前端がピボット軸２５にて上下揺動自在に支持されている。そして、このリヤアーム２４の後端には駆動輪である後輪２６が回転自在に軸支されており、リヤアーム２４と後輪２６はリヤクッション２７によって車体フレーム１４に懸架されている。
【００２２】
又、左右の車体フレーム１４の水平部にはフートステップ２８（図１及び図２には一方のみ図示）がそれぞれ取り付けられており、左側の車体フレーム１４のフートステップ２８の後方にはサイドスタンド２９が軸３０によって回動可能に軸支されて設けられており、サイドスタンド２９はリターンスプリング３１によって閉じ側に付勢されている。
【００２３】
ところで、本実施の形態に係る電動二輪車１においては、シート１５の下方の左右の車体フレーム１４の間にバッテリ３２が脱着可能に配置されている。このバッテリ３２は充電可能な複数の２次電池を収納して構成されており、その上面には傾倒自在なハンドル３３が設けられている（図２及び図３参照）。又、バッテリ３２の後面には、図３に示すように、上下方向に連続して形成された左右のリブ３２ａによって形成されたガイド溝が上下方向に貫設されている。
【００２４】
一方、図１及び図２に示すように、前記シート１５の下方の左右の車体フレーム１４間には、上面が開口するカップ状のケース３４が取り付けられており、このケース３４には前記バッテリ３２の下部が部分的に装着される。尚、図２に示すように、ケース３４内には放電端子３５が立設されており、バッテリ３２を図１に示すようにケース３４に収納すると、該バッテリ３２の底面に埋設された不図示の放電端子がケース３４側の前記放電端子３５に接続される。
【００２５】
又、上記ケース３４の後部には、図２に示すように、車幅方向に広い板状のガイド部材３６が車体後方に向かって斜め上方に立設されており、該ガイド部材３６の上部は、車体フレーム１４側に固定されたブラケット３７によって支持されている。尚、ガイド部材３６の上端部は車体後方に向かって円弧状に折り曲げられて導入部３６ａを構成している（図２参照）。
【００２６】
次に、後輪２６を駆動する電動パワーユニットの構成を図４〜図９に基づいて説明する。尚、図４は電動二輪車の後輪部分の左側面図、図５は図４のＡ−Ａ線断面図、図６は図５のＢ−Ｂ線矢視図、図７は図５のＣ−Ｃ線矢視図、図８は図７のＤ−Ｄ線断面図、図９はリヤブレーキの駆動系の構成を示す側面図である。
【００２７】
前記リヤアーム２４の略円形を成す後端部２４ａの右側端面には、図５に示すように、ギヤカバー３８が被着され、その内部に形成された空間内に電動パワーユニットを構成する電動モータ３９と遊星ギヤ減速機４０及びコントローラ４１が一体的に組み込まれている。
【００２８】
駆動源としての上記電動モータ３９には車幅方向に扁平なアキシャルギャップ型のものが使用され、図５に示すように、該電動モータ３９は、リヤアーム２４の後端部に支持された回転軸４２に固定されたロータ３９Ａと、該ロータ３９Ａに対向してリヤアーム後端部２４ａの内面に固設されたステータ３９Ｂとで構成されている。
【００２９】
ここで、前記回転軸４２は車幅方向に配され、その基端部はベアリング４３によってリヤアーム２４の後端部２４ａに回転自在に支承されており、前記ロータ３９Ａは、回転軸４２にその中心部が結着されたヨーク３９ａと、該ヨーク３９ａの前記ステータ３９Ｂに対向する外周面に固定されたマグネット３９ｂとで構成されている。
【００３０】
又、前記ステータ３９Ｂは、複数のコイル３９ｃをリヤアーム２４の後端部２４ａ内面の回転軸４２周りに同心円状に固設して構成されるが、図６に示すように、これらのコイル３９ｃは側面視おいて車体前方（図６の右方）に向かって開放されたＣ字状に並設されており、その開放部分には前記コントローラ４１の一部が臨んでいる。
【００３１】
一方、前記遊星ギヤ減速機４０は、前記ロータ３９Ａのヨーク３９ａの中央部に形成された凹部内に組み込まれており、これは前記回転軸４２に一体に形成された小径のサンギヤ４２ａと該サンギヤ４２ａと同心的に配設された大径のリングギヤ４４及びサンギヤ４２ａとリングギヤ４４に噛合する３つの遊星ギヤ４５を含んで構成されている。
【００３２】
ところで、上記遊星ギヤ４５は、ピン４６によってキャリア４７に回転自在に支持されており、各遊星ギヤ４５は、ピン４６を中心として自転するとともに、サンギヤ４２ａの周りを公転し、ピン４６を介してキャリア４７に回転を伝達する。
【００３３】
ここで、キャリア４７の一部は前記回転軸４２と同軸に配された後車軸４７ａを構成しており、この後車軸４７ａを含むキャリア４７の全体は一対のベアリング４８によって前記ギヤカバー３８に回転自在に支持されている。
【００３４】
又、前記リングギヤ４４は回転可能に支持されており、その外周部には公知のワンウェイクラッチ４９が介設されている。尚、ワンウェイクラッチ４９は、電動モータ３９から後輪２６方向への回転伝達を許容し、その逆方向への回転伝達を遮断するものである。
【００３５】
他方、前記後車軸４７ａのギヤカバー３８外へ延出する端部には、前記後輪２６がスプライン嵌合されてナット５０によって結着されており、図５に示すように、後輪２６のホイール５１の内面に一体に形成されたドラム部５１ａの内部（ホイール５１の内面とギヤカバー３８との間に形成された空間）にはドラム式のリヤブレーキ５２が組み込まれている。
【００３６】
上記リヤブレーキ５２は、図７に示すように、後輪２６のホイール５１の前記ドラム部５１ａ内周に固設されたブレーキライニング５３、該ブレーキライニング５３の内側に配された２つの半月状ブレーキシュー５４を備えており、２つのブレーキシュー５４の一端同士は支持ピン５５によって回動可能に連結され、他端部間にはカム５６が介設されている。そして、両ブレーキシュー５４は、これらに張架された２本のリターンスプリング５７によって閉じ側（ブレーキ非作動側）に付勢されている。尚、前記支持ピン５５は、図５に示すように、ボス５８を介して前記ギヤカバー３８に支持されている。
【００３７】
ところで、図８に示すように、前記カム５６は、ギヤカバー３８に挿通固着されたボス５９にその軸部（以下、カム軸と称する）５６ａが回動可能に挿通支持されており、該カム軸５６ａのギヤカバー３８内の空間に臨む一端（左端）には図９に示すように扇形のセクタギヤ６０が結着されている。
【００３８】
一方、リヤアーム２４の下部に一体に形成されたブラケット２４ｂ（図７及び図８参照）には、前記カム軸５６ａに対して車体後方にオフセットされたカムレバー軸６１が回動可能に挿通支持されており、該カムレバー軸６１のギヤカバー３８内の空間の臨む一端（左端）には、図７及び図８に示すように、前記セクタギヤ６０に噛合する扇形のセクタギヤ６２が結着され、カムレバー軸６１のリヤアーム２４外へ突出する他端（右端）にはカムレバー６３が結着されている。そして、このカムレバー６３は、リターンスプリング６４によって一方向（ブレーキ非作動方向）に付勢されており、図４に示すブレーキワイヤー６５を介して前記ブレーキレバー７（図１参照）に連結されている。尚、図８に示すように、前記セクタギヤ６２は、前記電動モータ３９のロータ３９Ａとの干渉を避けて直角に屈曲成形されている。
【００３９】
ところで、前記コントローラ４１は、前記電動モータ３９を制御するものであって、これと前記電動モータ３９とは図６に示す電極板６６によって電気的に接続され、該コントローラ４１と前記バッテリ３２及び不図示の前記スロットルグリップとは図６に示す被覆線６７によって電気的に接続されている。
【００４０】
而して、電動二輪車１においては、バッテリ３２からの電力の供給を受けて電動モータ３９が回転駆動されると、その回転は遊星ギヤ減速機４０によって減速されて後車軸４７ａに伝達され、該後車軸４７ａとこれに結着された後輪２６が回転駆動されて当該電動二輪車１が所定の速度で走行せしめられる。そして、電動二輪車１の走行中にライダーがハンドル５に設けられた不図示のスロットルグリップを回して加減速操作すると、その操作信号がコントローラ４１に伝達されて電動モータ３９の回転及び後輪２６の回転が制御されて電動二輪車１の車速が加減速される。
【００４１】
又、ライダーが図１に示すブレーキレバー７を回動させて制動操作すると、図４に示すブレーキワイヤー６５が引かれてカムレバー６３が回動し、その回動はカムレバー軸６１及びセクタギヤ６２，６０を経てカム５６に伝達され、該カム５６が回動する。すると、このカム５６によってリヤブレーキ５２のブレーキシュー５４が押し開かれ、該ブレーキシュー５４は、リターンスプリング５７の付勢力に抗して支持ピン５５を中心に回動して拡開し、ブレーキライニング５３の内周面に押圧される。この結果、ブレーキシュー５４とブレーキライニング５３間に摩擦力が発生し、この摩擦力によって後輪２６の回転に所要の制動力が作用するため、電動二輪車１が減速或は停止せしめられる。
【００４２】
ところで、使用によってバッテリ３２の電圧が低下したために該バッテリ３２の充電を行う場合には該バッテリ３２を車体から取り外すが、このバッテリ３２の取り外しは以下の要領でなされる。
【００４３】
即ち、不図示のロック機構によるシート１５のロックを解除した後、該シート１５を図２に示すようにヒンジ１７を中心として回動させてこれを開くと、バッテリ３２の上方が開放される。
【００４４】
次に、上記状態においてバッテリ３２の上部に設けられたハンドル３３を起こしてこれを把持し、該バッテリ３２をガイド部材３６に沿って上方に引き上げることによってこれを容易に取り外すことができ、取り外したバッテリ３２を充電することができる。
【００４５】
その後、バッテリ３２の充電が終了して該バッテリ３２を再び装着する際には、図２に示す状態において、バッテリ３２をガイド部材３６に沿って下方に摺動させてこれの下部をケース３４に部分的に装着すれば良い。即ち、バッテリ３２の後面をガイド部材３６上端の導入部３６ａに当てて該バッテリ３２をガイド部材３６に沿って押し下げると、バッテリ３２の後端面に貫設された前記ガイド溝がガイド部材３６に嵌合するため、バッテリ３２はガイド部材３６にガイドされながらガタなくスムーズに摺動して装着され、該バッテリ３２の底面に埋設された不図示の放電端子がケース３４側の放電端子３５に接続されてバッテリ３２の使用が可能となる。
【００４６】
そして、上述のようにしてバッテリ３２が装着されると、シート１５をヒンジ１７を中心として回動させてこれを図１に示すように閉めると、該シート１５の閉じ状態がロック機構によってロックされるとともに、シート１５のボトムプレート１５ａに取り付けられたクッション材１８がバッテリ３２の上面を押圧して該バッテリ３２を確実に保持する。
【００４７】
以上において、本実施の形態によれば、後輪２６のホイール５１内面とギヤカバー３８との間に形成される空間を利用してドラム式のリヤブレーキ５２をコンパクトに配置することができる。
【００４８】
又、リヤブレーキ５２のカム軸５６ａとカムレバー軸６１を車体前後方向にオフセットしてリヤアーム２４に回動可能に取り付け、両者をセクタギヤ６０，６２にて連結したため、制動操作によるカムレバー６３の回動をカムレバー軸６１とセクタギヤ６２，６０を経てカム軸５６ａに伝達することができ、カム軸５６ａと一体のカム５６を回動させてリヤブレーキ５２を作動させることができ、電動パワーユニットをリヤアーム２４内に組み込んで成る本実施の形態に係る電動二輪車１に対してドラム式のリヤブレーキ５２を採用することができる。
【００４９】
更に、リヤアーム２４内に配された一対のセクタギヤ６０，６２のうち、一方のセクタギヤ６２を前述のように電動モータ３９の回転側のロータ３９Ａとの干渉を避けて直角に屈曲成形したため（図８参照）、これらのセクタギヤ６０，６２を含むブレーキ駆動系をリヤアーム２４内にコンパクトに収納することができる。
【００５０】
尚、本実施の形態では、カムレバー軸６１の回転をカム軸５６ａに伝達するための回転伝達手段をセクタギヤ６０，６２で構成したが、図１０に示すように、回転伝達手段をリンク機構７０で構成しても良い。
【００５１】
＜実施の形態２＞
次に、本発明の実施の形態２を図１１に基づいて説明する。尚、図１１は本実施の形態に係る制動装置の構成を示す電動二輪車のリヤアーム部の一部を破断した部分側面図であり、本図においては図１〜図１０に示したと同一要素には同一符号を付しており、以下、それらについての説明は省略する。
【００５２】
本実施の形態は、制動装置であるリヤブレーキ５２の回転伝達手段を構成するリンク機構７０をリヤアーム２４の上側に配置したことを特徴とする。具体的には、リンク機構７０の最下端部はリヤアーム２４の後端部２４ａ下縁よりも上側に配置している。
【００５３】
ここで、リンク機構７０は、カム軸５６ａに結着されて前下方（図１１において矢印Ｆｒ方向が車体前方）に延出するブレーキアーム７１と、該ブレーキアーム７１の上方に配置されてその中間部がカムレバー軸６１によって回動可能に軸支された側面視略Ｌ字状のカムレバー６３とをリンクによって連結して構成されている。そして、カムレバー６３の端部（上端）にはブレーキワイヤー６５の一端が係止されており、該ブレーキワイヤー６５の他端は車体前方に延びてハンドルに設けられた不図示のブレーキレバーに連結されている。尚、カムレバー６３は、不図示のリターンスプリングによって一方向（図１１の時計方向）、ブレーキ非作動時には図１１に実線にて示す位置にある。
【００５４】
ところで、本実施の形態に係る電動二輪車においては、後輪２６をその上方から覆うリヤフェンダ７３がボルト７４によってリヤアーム２４の後端部２４ａに取り付けられているが、このリヤフェンダ７３によって前記リンク機構７０の少なくとも一部がその外方から覆われている。より具体的には、リンク機構７０のカムレバー６３の略全体とリンク７２の上部とがリヤフェンダ７３の前部によってその上方と外側方とから覆われている。
【００５５】
而して、ライダーが不図示のブレーキレバー（車体前方）を回動させて制動操作すると、ブレーキワイヤー６５が図示矢印方向に引かれてカムレバー６３が不図示のリターンスプリングの付勢力に抗してカムレバー軸６１を中心として矢印方向（反時計方向）に図示鎖線位置まで回動し、リンク７２を上方へと押し上げる。すると、ブレーキアーム７１がカム軸５６ａと共に図示矢印方向（時計方向）に鎖線位置まで回動するため、カム軸５６ａに一体に形成されたカム５６が同方向に同角度だけ回動する。このカム５６の回動によって２つのブレーキシュー５４が押し開かれ、該ブレーキシュー５４は、不図示のリターンスプリングの付勢力に抗して支持ピン５５を中心として回動して拡開し、ブレーキライニング５３の内周面に押圧される。この結果、ブレーキシュー５４とブレーキライニング５３間に摩擦力が発生し、この摩擦力によって後輪２６の回転に所要の制動力が作用するため、電動二輪車が減速或は停止せしめられる。
【００５６】
以上において、本実施の形態に係るリヤブレーキ５２においては、前述のようにリンク機構７０の最下端部をリヤアーム２４の後端部２４ａ下縁よりも上側に配置したため、電動二輪車の走行中において、リヤブレーキ５２の突出部であるリンク機構７０が走行路面上の何らかの物体に衝突しようとしても、これに先立って、リヤアーム２４の後端部２４ａ下縁が前記物体に衝突し、それ以上にリンク機構７０が物体に衝突することがないため、リンク機構７０が損傷から有効に保護される。
【００５７】
又、前述のようにリヤフェンダ７３によってリンク機構７０の少なくとも一部をその外方から覆ったため、外観的に見え易い高い位置に配置されたリンク機構７０が外部に露出することがなく、電動二輪車の外観性が良好に保たれる。
【００５８】
＜実施の形態３＞
次に、本発明の実施の形態３を図１２に基づいて説明する。尚、図１２は本実施の形態に係る制動装置の構成を示す電動二輪車のリヤアーム部の一部を破断した部分側面図であり、本図においては図１１に示したと同一要素には同一符号を付している。
【００５９】
本実施の形態は、前記実施の形態２におけるリンク７２を省略し、カムレバー６３とブレーキアーム７１とを連結した構成を採用しており、他の構成は前記実施の形態２のそれと同じである。
【００６０】
従って、本実施の形態においても前記実施の形態２と同様の効果が得られる他、リヤブレーキ５２の構成の簡素化を図ることができる。
【００６１】
【発明の効果】
以上の説明で明らかなように、本発明によれば、電動モータと該電動モータの回転を減速して後車軸に伝達する減速機を含んで構成される電動パワーユニットをリヤアーム内に組み込み、リヤアームの後部から外側方に突出する前記後車軸の端部に後輪を取り付けて成る電動二輪車において、前記後輪のホイール内面と前記リヤアームとの間に形成される空間にドラム式ブレーキを配置するとともに、該ドラム式ブレーキのカム軸とカムレバー軸を後車軸の径方向にオフセットして前記リヤアームに回動可能に取り付け、両者を回転伝達手段にて連結したため、電動パワーユニットをリヤアーム内に組み込み、リヤアームの後部から外側方に突出する後車軸の端部に後輪を取り付けて成る電動二輪車に対してドラム式ブレーキを採用してこれをコンパクトに配置することができるという効果が得られる。
【図面の簡単な説明】
【図１】本発明に係る電動二輪車の側面図である。
【図２】バッテリ脱着時の状態を示す電動二輪車後部の破断側面図である。
【図３】本発明に係る電動二輪車のバッテリ部分のシートを取り除いた状態の部分平面図である。
【図４】本発明に係る電動二輪車の後輪部分の左側面図である。
【図５】図４のＡ−Ａ線断面図である。
【図６】図５のＢ−Ｂ線矢視図である。
【図７】図５のＣ−Ｃ線矢視図である。
【図８】図７のＤ−Ｄ線断面図である。
【図９】本発明に係る電動二輪車のリヤブレーキ駆動系の構成を示す側面図である。
【図１０】本発明に係る電動二輪車のリヤブレーキ駆動系の他の構成を示す側面図である。
【図１１】本発明の実施の形態２に係る制動装置の構成を示す電動二輪車のリヤアーム部の一部を破断した部分側面図である。
【図１２】本発明の実施の形態３に係る制動装置の構成を示す電動二輪車のリヤアーム部の一部を破断した部分側面図である。
【符号の説明】
１ 電動二輪車
２４ リヤアーム
２４ａ リヤアーム後端部
２６ 後輪
３９ 電動モータ
３９Ａ ロータ（回転部材）
４０ 遊星ギヤ減速機（減速機）
４７ａ 後車軸
５１ ホイール
５２ ドラム式リヤブレーキ
５６ カム
５６ａ カム軸
６０，６２ セクタギヤ（回転伝達手段）
６１ カムレバー軸
６３ カムレバー
６５ ブレーキワイヤー
７０ リンク機構（回転伝達手段）
７１ ブレーキアーム
７２ リンク
７３ リヤフェンダ[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a braking device for an electric motorcycle that travels using an electric motor as a drive source.
[0002]
[Prior art]
Conventionally, motorcycles mainly use an engine as a drive source, but from the viewpoint of environmental protection and the like, an electric motorcycle that runs using an electric motor as a drive source has been developed.
[0003]
As such an electric motorcycle, an electric power unit configured to include an electric motor and a speed reducer that decelerates the rotation of the electric motor and transmits it to the rear axle is incorporated in the rear arm, and the rear projecting outward from the rear portion of the rear arm. There has been proposed one in which a rear wheel is attached to an end portion of an axle.
[0004]
[Problems to be solved by the invention]
By the way, when a drum brake is employed as a braking device for the electric motorcycle, the arrangement and the structure of the drive system become a problem. In particular, in an electric motorcycle in which an electric power unit is incorporated in a rear arm and a rear wheel is attached to an end portion of a rear axle protruding outward from the rear portion of the rear arm, a rear wheel and an electric motor are provided on the left and right sides of the drum brake cam. Therefore, it is not possible to employ a configuration in which the cam lever is directly connected to the cam shaft of the drum brake as in the prior art.
[0005]
The present invention has been made in view of the above-described problems. An object of the present invention is to provide an electric power unit in which an electric power unit is incorporated in a rear arm and a rear wheel is attached to an end portion of a rear axle protruding outward from the rear portion of the rear arm. An object of the present invention is to provide a braking device for an electric motorcycle that can employ a drum-type brake for a motorcycle and that can be disposed compactly.
[0006]
[Means for Solving the Problems]
In order to achieve the above object, an invention according to claim 1 is directed to an electric power unit configured to include an electric motor and a reduction gear that decelerates the rotation of the electric motor and transmits it to the rear axle. In the electric motorcycle comprising a rear wheel attached to an end portion of the rear axle projecting outward from the rear portion, The rear axle is arranged to line up in the extending direction of the rotating shaft of the electric motor, In the space formed between the wheel inner surface of the rear wheel and the rear arm Smaller diameter than the electric motor A drum brake is arranged and the cam shaft of the drum brake is Inside the outer diameter of the electric motor, a cam lever shaft is arranged outside the outer diameter of the electric motor in parallel with the rotation shaft of the electric motor, and the cam shaft and the cam lever shaft are arranged in the diameter of the rear axle. It is offset in the direction and attached to the rear arm so as to be rotatable, and both are connected by a rotation transmitting means.
[0007]
According to a second aspect of the present invention, in the first aspect of the invention, the rotation transmitting means is constituted by a pair of sector gears arranged in the rear arm, and at least one of the sector gears is bent to avoid interference with the rotating member. It is characterized by being molded.
[0008]
According to a third aspect of the present invention, in the first aspect of the present invention, the rotation transmitting means is constituted by a link mechanism.
[0009]
According to a fourth aspect of the present invention, in the third aspect of the present invention, the lowermost end portion of the link mechanism is disposed above the lower edge of the rear end portion of the rear arm.
[0010]
The invention according to claim 5 is the invention according to claim 4, wherein a rear fender that covers the rear wheel from above is attached to the rear arm, and at least a part of the link mechanism is covered from the outside by the rear fender. Features.
[0011]
Therefore, according to the first to third aspects of the invention, it is possible to arrange the drum brake in a compact manner by utilizing the space formed between the wheel inner surface of the rear wheel and the rear arm. In addition, the cam shaft and cam lever shaft of the drum brake are offset in the longitudinal direction of the vehicle body and attached to the rear arm so as to be pivotable, and both are connected by a gear, so that the cam lever is rotated by the cam operation via the cam lever shaft and gear. The drum brake can be operated by rotating the cam integrated with the cam shaft and the drum type brake can be operated, and the drum type brake is adopted for the electric motorcycle in which the electric power unit is incorporated in the rear arm. Can do.
[0012]
According to the fourth aspect of the present invention, since the lowermost end portion of the link mechanism is disposed above the lower edge of the rear end of the rear arm, the link mechanism, which is the protruding portion of the drum brake, travels when the electric motorcycle is traveling. Even if it tries to collide with any of the above objects, the lower edge of the rear end of the rear arm will collide with the object prior to this, and the link mechanism will not collide with the object any more. Protected.
[0013]
According to the invention described in claim 5, since at least a part of the link mechanism is covered from the outside by the rear fender, the link mechanism arranged at a high position where it is easy to see externally is not exposed to the outside. The appearance of is kept good.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the accompanying drawings.
[0015]
<Embodiment 1>
FIG. 1 is a side view of an electric motorcycle according to the present invention, FIG. 2 is a cutaway side view of a rear portion of the electric motorcycle showing a state when the battery is detached, and FIG. 3 is a partial plan view of the electric motorcycle with a seat removed. It is.
[0016]
The electric motorcycle 1 shown in FIG. 1 includes a head pipe 2 at an upper front portion of the vehicle body, and a steering shaft (not shown) is rotatably inserted into the head pipe 2. An upper bracket 3 is attached to the upper end of the steering shaft, an under bracket 4 is attached to the lower end, and a handle 5 is attached to the upper bracket 3. A grip 6 is attached to both ends of the handle 5, a brake lever 7 is provided in the vicinity of the left grip 6, and the grip 6 on the right side (the back side in FIG. 1) is rotated. It constitutes a possible throttle grip.
[0017]
An upper portion of a front fork 8 is attached to the upper bracket 3 and the under bracket 4, and a front wheel 9 is rotatably supported by a front axle 10 at the lower end of the front fork 8. A meter 11 is disposed on the upper bracket 3 in front of the handle 5, and a headlamp 12 fixed to the upper portion of the front fork 8 is disposed below the meter 11, and on both sides thereof. A flasher lamp 13 (only one is shown in FIG. 1) is provided.
[0018]
On the other hand, a pair of left and right vehicle body frames 14 having a U-shape in side view are extended from the head pipe 2 toward the rear of the vehicle body. That is, the round pipe-shaped body frame 14 extends obliquely downward from the head pipe 2 toward the rear of the vehicle body, then bends in an arc shape toward the rear, extends substantially horizontally toward the rear of the vehicle body, and then upwards. It is bent in an arc shape and rises obliquely upward toward the rear of the vehicle body to form a U shape in side view. The rear end portion 14a of the vehicle body frame 14 is bent along the shape of the seat 15, and the left and right rear end portions 14a constitute one continuous pipe.
[0019]
By the way, in the vicinity of the rear part of the left and right body frames 14, an inverted U-shaped seat stay 16 (see FIG. 3) is welded obliquely upward toward the front of the vehicle body. The seat 15 is arranged to be openable and closable at a portion surrounded by the left and right body frames 14. That is, as shown in FIG. 2, the front end portion of the seat 15 is supported by a hinge 17 on the front end horizontal portion of the seat stay 16 so as to be pivotable up and down. A cushion material 18 is attached.
[0020]
On the vehicle body frame 14 side, a seat stay 19 that supports the seat 15 and a lock mechanism (not shown) for fixing and locking the seat 15 in a closed state are provided. Here, a tail lamp 21 is attached to the rear surface of the rear fender 20 attached to the rear end of the vehicle body frame 14, and flasher lamps 22 (only one is shown in FIGS. 1 and 2) are arranged on the left and right sides thereof. ing.
[0021]
On the other hand, rear arm brackets 23 (only one is shown in FIGS. 1 and 2) are welded to the bent portions below the seat 15 of the left and right body frames 14, respectively. The front end is supported by a pivot shaft 25 so as to be swingable up and down. A rear wheel 26 as a driving wheel is rotatably supported at the rear end of the rear arm 24, and the rear arm 24 and the rear wheel 26 are suspended from the vehicle body frame 14 by a rear cushion 27.
[0022]
In addition, foot steps 28 (only one is shown in FIGS. 1 and 2) are respectively attached to the horizontal portions of the left and right body frames 14, and a side stand 29 is disposed behind the foot steps 28 of the left body frame 14. The side stand 29 is urged toward the closing side by a return spring 31.
[0023]
By the way, in the electric motorcycle 1 according to the present embodiment, the battery 32 is detachably disposed between the left and right body frames 14 below the seat 15. The battery 32 is configured to accommodate a plurality of rechargeable secondary batteries, and a handle 33 that can be tilted is provided on the upper surface thereof (see FIGS. 2 and 3). Further, as shown in FIG. 3, guide grooves formed by left and right ribs 32a continuously formed in the vertical direction are provided on the rear surface of the battery 32 in the vertical direction.
[0024]
On the other hand, as shown in FIGS. 1 and 2, a cup-shaped case 34 having an open upper surface is attached between the left and right body frames 14 below the seat 15, and the battery 32 is attached to the case 34. The lower part of is partially attached. As shown in FIG. 2, a discharge terminal 35 is erected in the case 34. When the battery 32 is stored in the case 34 as shown in FIG. 1, it is not shown embedded in the bottom surface of the battery 32. Is connected to the discharge terminal 35 on the case 34 side.
[0025]
Further, as shown in FIG. 2, a plate-like guide member 36 that is wide in the vehicle width direction is erected obliquely upward toward the rear of the vehicle body, and the upper portion of the guide member 36 is It is supported by a bracket 37 fixed to the body frame 14 side. The upper end portion of the guide member 36 is bent in an arc shape toward the rear of the vehicle body to form an introduction portion 36a (see FIG. 2).
[0026]
Next, the configuration of the electric power unit that drives the rear wheel 26 will be described with reference to FIGS. 4 is a left side view of the rear wheel portion of the electric motorcycle, FIG. 5 is a cross-sectional view taken along the line AA in FIG. 4, FIG. 6 is a view taken along the line BB in FIG. FIG. 8 is a cross-sectional view taken along line C, FIG. 8 is a cross-sectional view taken along the line D-D in FIG. 7, and FIG.
[0027]
As shown in FIG. 5, a gear cover 38 is attached to the right end surface of the rear end portion 24a having a substantially circular shape of the rear arm 24, and an electric motor 39 constituting an electric power unit in a space formed therein. The planetary gear speed reducer 40 and the controller 41 are integrally incorporated.
[0028]
The electric motor 39 as a drive source is of an axial gap type that is flat in the vehicle width direction. As shown in FIG. 5, the electric motor 39 is a rotating shaft supported on the rear end portion of the rear arm 24. The rotor 39A is fixed to 42, and the stator 39B is fixed to the inner surface of the rear arm rear end 24a so as to face the rotor 39A.
[0029]
Here, the rotating shaft 42 is arranged in the vehicle width direction, and a base end portion thereof is rotatably supported by the rear end portion 24a of the rear arm 24 by a bearing 43. The rotor 39A is centered on the rotating shaft 42. The yoke 39a is attached to the portion, and the magnet 39b is fixed to the outer peripheral surface of the yoke 39a facing the stator 39B.
[0030]
The stator 39B is configured by concentrically fixing a plurality of coils 39c around the rotation shaft 42 on the inner surface of the rear end 24a of the rear arm 24. As shown in FIG. They are arranged side by side in a C-shape opened toward the front of the vehicle body (to the right in FIG. 6) in a side view, and a part of the controller 41 faces the open portion.
[0031]
On the other hand, the planetary gear speed reducer 40 is incorporated in a recess formed in the central portion of the yoke 39a of the rotor 39A, which includes a small-diameter sun gear 42a formed integrally with the rotary shaft 42 and the sun gear. A large-diameter ring gear 44 disposed concentrically with 42 a and three planetary gears 45 meshing with the sun gear 42 a and the ring gear 44 are configured.
[0032]
By the way, the planetary gear 45 is rotatably supported by a carrier 47 by pins 46, and each planetary gear 45 rotates around the pin 46 and revolves around the sun gear 42a. The rotation is transmitted to the carrier 47.
[0033]
Here, a part of the carrier 47 constitutes a rear axle 47 a arranged coaxially with the rotary shaft 42, and the entire carrier 47 including the rear axle 47 a is rotatable to the gear cover 38 by a pair of bearings 48. It is supported by.
[0034]
The ring gear 44 is rotatably supported, and a known one-way clutch 49 is interposed on the outer periphery thereof. The one-way clutch 49 allows rotation transmission from the electric motor 39 in the direction of the rear wheel 26 and blocks rotation transmission in the opposite direction.
[0035]
On the other hand, the rear wheel 26 is spline-fitted to an end portion of the rear axle 47a that extends out of the gear cover 38, and is attached by a nut 50. As shown in FIG. A drum-type rear brake 52 is incorporated in a drum portion 51 a formed integrally with the inner surface of the 51 (a space formed between the inner surface of the wheel 51 and the gear cover 38).
[0036]
As shown in FIG. 7, the rear brake 52 includes a brake lining 53 fixed to the inner periphery of the drum portion 51 a of the wheel 51 of the rear wheel 26, and two half-moon brakes arranged inside the brake lining 53. A shoe 54 is provided, and one ends of the two brake shoes 54 are rotatably connected by a support pin 55, and a cam 56 is interposed between the other ends. Both brake shoes 54 are urged toward the closing side (the brake non-operating side) by two return springs 57 stretched between them. The support pin 55 is supported by the gear cover 38 via a boss 58 as shown in FIG.
[0037]
Incidentally, as shown in FIG. 8, the cam 56 has a shaft portion (hereinafter referred to as a cam shaft) 56a rotatably inserted into and supported by a boss 59 that is inserted and fixed to the gear cover 38. As shown in FIG. 9, a sectoral sector gear 60 is attached to one end (left end) facing the space in the gear cover 38 of 56a.
[0038]
On the other hand, a bracket 24b (see FIGS. 7 and 8) formed integrally with the lower portion of the rear arm 24 is rotatably supported by a cam lever shaft 61 that is offset to the rear of the vehicle body with respect to the cam shaft 56a. As shown in FIGS. 7 and 8, a fan-shaped sector gear 62 meshing with the sector gear 60 is attached to one end (left end) of the cam lever shaft 61 facing the space in the gear cover 38. A cam lever 63 is attached to the other end (right end) protruding outside the rear arm 24. The cam lever 63 is biased in one direction (the brake non-operating direction) by a return spring 64, and is connected to the brake lever 7 (see FIG. 1) via a brake wire 65 shown in FIG. . As shown in FIG. 8, the sector gear 62 is bent at a right angle to avoid interference with the rotor 39A of the electric motor 39.
[0039]
By the way, the controller 41 controls the electric motor 39, and this and the electric motor 39 are electrically connected by an electrode plate 66 shown in FIG. The illustrated throttle grip is electrically connected by a covered wire 67 shown in FIG.
[0040]
Thus, in the electric motorcycle 1, when the electric motor 39 is driven to rotate by receiving the supply of electric power from the battery 32, the rotation is decelerated by the planetary gear reducer 40 and transmitted to the rear axle 47a. The rear axle 47a and the rear wheel 26 attached thereto are rotationally driven, and the electric motorcycle 1 is caused to travel at a predetermined speed. When the rider turns the throttle grip (not shown) provided on the handle 5 to perform acceleration / deceleration operation while the electric motorcycle 1 is traveling, the operation signal is transmitted to the controller 41 to rotate the electric motor 39 and the rear wheel 26. The rotation is controlled and the vehicle speed of the electric motorcycle 1 is accelerated or decelerated.
[0041]
Further, when the rider turns the brake lever 7 shown in FIG. 1 to perform a braking operation, the brake wire 65 shown in FIG. 4 is pulled and the cam lever 63 is turned. This rotation is caused by the cam lever shaft 61 and the sector gears 62, 60. Is transmitted to the cam 56, and the cam 56 rotates. As a result, the brake shoe 54 of the rear brake 52 is pushed open by the cam 56, and the brake shoe 54 rotates about the support pin 55 against the urging force of the return spring 57 and expands to the brake lining. The inner peripheral surface of 53 is pressed. As a result, a frictional force is generated between the brake shoe 54 and the brake lining 53, and the required braking force acts on the rotation of the rear wheel 26 by this frictional force, so that the electric motorcycle 1 is decelerated or stopped.
[0042]
By the way, when charging the battery 32 because the voltage of the battery 32 has decreased due to use, the battery 32 is removed from the vehicle body. The battery 32 is removed in the following manner.
[0043]
That is, after unlocking the seat 15 by a lock mechanism (not shown) and then rotating the seat 15 around the hinge 17 as shown in FIG. 2, the upper portion of the battery 32 is opened.
[0044]
Next, in the above state, the handle 33 provided at the upper part of the battery 32 is raised and gripped, and the battery 32 can be easily removed by pulling it upward along the guide member 36. The battery 32 can be charged.
[0045]
Thereafter, when the charging of the battery 32 is completed and the battery 32 is mounted again, the battery 32 is slid downward along the guide member 36 in the state shown in FIG. It may be partially attached. That is, when the rear surface of the battery 32 is brought into contact with the introduction portion 36 a at the upper end of the guide member 36 and the battery 32 is pushed down along the guide member 36, the guide groove formed through the rear end surface of the battery 32 is fitted into the guide member 36. Therefore, the battery 32 is smoothly slid and mounted while being guided by the guide member 36, and a discharge terminal (not shown) embedded in the bottom surface of the battery 32 is connected to the discharge terminal 35 on the case 34 side. Thus, the battery 32 can be used.
[0046]
When the battery 32 is mounted as described above, when the seat 15 is rotated about the hinge 17 and closed as shown in FIG. 1, the closed state of the seat 15 is locked by the lock mechanism. At the same time, the cushion material 18 attached to the bottom plate 15a of the seat 15 presses the upper surface of the battery 32 to securely hold the battery 32.
[0047]
As described above, according to the present embodiment, the drum-type rear brake 52 can be arranged compactly by utilizing the space formed between the inner surface of the wheel 51 of the rear wheel 26 and the gear cover 38.
[0048]
Further, since the cam shaft 56a and the cam lever shaft 61 of the rear brake 52 are offset in the longitudinal direction of the vehicle body and are rotatably attached to the rear arm 24, and both are connected by the sector gears 60 and 62, the cam lever 63 is rotated by the braking operation. It can be transmitted to the cam shaft 56 a via the cam lever shaft 61 and the sector gears 62, 60, the cam 56 integral with the cam shaft 56 a can be rotated to operate the rear brake 52, and the electric power unit is placed in the rear arm 24. A drum-type rear brake 52 can be employed for the electric motorcycle 1 according to the present embodiment.
[0049]
Further, of the pair of sector gears 60 and 62 arranged in the rear arm 24, one sector gear 62 is bent at right angles while avoiding interference with the rotor 39A on the rotating side of the electric motor 39 as described above (FIG. 8). The brake drive system including these sector gears 60 and 62 can be accommodated in the rear arm 24 in a compact manner.
[0050]
In the present embodiment, the rotation transmission means for transmitting the rotation of the cam lever shaft 61 to the cam shaft 56a is constituted by the sector gears 60 and 62. However, as shown in FIG. It may be configured.
[0051]
<Embodiment 2>
Next, a second embodiment of the present invention will be described with reference to FIG. FIG. 11 is a partial side view in which a part of the rear arm portion of the electric motorcycle showing the configuration of the braking device according to the present embodiment is broken. In FIG. 11, the same elements as those shown in FIGS. The same reference numerals are given, and description thereof will be omitted below.
[0052]
The present embodiment is characterized in that the link mechanism 70 constituting the rotation transmission means of the rear brake 52 as a braking device is arranged on the upper side of the rear arm 24. Specifically, the lowermost end portion of the link mechanism 70 is disposed above the lower edge of the rear end portion 24a of the rear arm 24.
[0053]
Here, the link mechanism 70 is connected to the cam shaft 56a and extends forward and downward (in FIG. 11, the direction of the arrow Fr is the front of the vehicle body), and is disposed above the brake arm 71 and in the middle thereof. The cam lever 63 is pivotally supported by a cam lever shaft 61 and is connected to a substantially L-shaped cam lever 63 in side view by a link. One end of the brake wire 65 is locked to the end (upper end) of the cam lever 63, and the other end of the brake wire 65 extends forward of the vehicle body and is connected to a brake lever (not shown) provided on the handle. ing. The cam lever 63 is in one direction (clockwise in FIG. 11) by a return spring (not shown), and is in a position indicated by a solid line in FIG. 11 when the brake is not operated.
[0054]
Incidentally, in the electric motorcycle according to the present embodiment, a rear fender 73 that covers the rear wheel 26 from above is attached to the rear end 24a of the rear arm 24 by a bolt 74. At least a portion is covered from the outside. More specifically, substantially the entire cam lever 63 of the link mechanism 70 and the upper portion of the link 72 are covered from above and outside by the front portion of the rear fender 73.
[0055]
Thus, when the rider turns a brake lever (front of the vehicle body) (not shown) to perform a braking operation, the brake wire 65 is pulled in the direction of the arrow shown in the figure, and the cam lever 63 resists the biasing force of the return spring (not shown). The cam lever shaft 61 is rotated around the cam lever shaft 61 in the direction of the arrow (counterclockwise) to the position indicated by the chain line, and the link 72 is pushed upward. As a result, the brake arm 71 rotates together with the cam shaft 56a in the illustrated arrow direction (clockwise) to the chain line position, so that the cam 56 formed integrally with the cam shaft 56a rotates in the same direction by the same angle. The two brake shoes 54 are pushed and opened by the rotation of the cam 56, and the brake shoes 54 are rotated about the support pin 55 against the urging force of a return spring (not shown) to be expanded. It is pressed against the inner peripheral surface of the lining 53. As a result, a frictional force is generated between the brake shoe 54 and the brake lining 53, and the required braking force acts on the rotation of the rear wheel 26 by this frictional force, so that the electric motorcycle is decelerated or stopped.
[0056]
In the above, in the rear brake 52 according to the present embodiment, since the lowermost end portion of the link mechanism 70 is disposed above the lower edge of the rear end portion 24a of the rear arm 24 as described above, during traveling of the electric motorcycle, Even if the link mechanism 70 which is the protruding portion of the rear brake 52 tries to collide with any object on the traveling road surface, prior to this, the lower edge of the rear end portion 24a of the rear arm 24 collides with the object, and the link mechanism is further increased. Since the 70 does not collide with an object, the link mechanism 70 is effectively protected from damage.
[0057]
Further, since at least a part of the link mechanism 70 is covered from the outside by the rear fender 73 as described above, the link mechanism 70 disposed at a high position where it is easy to see externally is not exposed to the outside, and the electric motorcycle is Appearance is kept good.
[0058]
<Embodiment 3>
Next, Embodiment 3 of the present invention will be described with reference to FIG. FIG. 12 is a partial side view in which a part of the rear arm portion of the electric motorcycle showing the configuration of the braking device according to the present embodiment is cut away. In this figure, the same elements as those shown in FIG. It is attached.
[0059]
The present embodiment employs a configuration in which the link 72 in the second embodiment is omitted and the cam lever 63 and the brake arm 71 are connected, and the other configurations are the same as those in the second embodiment.
[0060]
Therefore, in the present embodiment, the same effect as in the second embodiment can be obtained, and the configuration of the rear brake 52 can be simplified.
[0061]
【The invention's effect】
As is apparent from the above description, according to the present invention, an electric power unit configured to include an electric motor and a reduction gear that decelerates the rotation of the electric motor and transmits it to the rear axle is incorporated in the rear arm. In the electric motorcycle in which a rear wheel is attached to an end portion of the rear axle projecting outward from the rear portion, a drum brake is disposed in a space formed between the wheel inner surface of the rear wheel and the rear arm, Since the cam shaft and cam lever shaft of the drum brake are offset in the radial direction of the rear axle and rotatably attached to the rear arm, and both are connected by a rotation transmission means, the electric power unit is incorporated in the rear arm, and the rear part of the rear arm A drum brake is adopted for an electric motorcycle in which a rear wheel is attached to an end portion of a rear axle projecting outward from the vehicle. Effect that can be arranged compactly.
[Brief description of the drawings]
FIG. 1 is a side view of an electric motorcycle according to the present invention.
FIG. 2 is a cutaway side view of the rear portion of the electric motorcycle showing a state when the battery is attached and detached.
FIG. 3 is a partial plan view of the electric motorcycle according to the present invention with the battery seat removed.
FIG. 4 is a left side view of a rear wheel portion of the electric motorcycle according to the present invention.
5 is a cross-sectional view taken along line AA in FIG.
6 is a view taken along the line BB in FIG.
7 is a view taken along the line CC of FIG.
8 is a cross-sectional view taken along the line DD of FIG.
FIG. 9 is a side view showing a configuration of a rear brake drive system of the electric motorcycle according to the present invention.
FIG. 10 is a side view showing another configuration of the rear brake drive system of the electric motorcycle according to the present invention.
FIG. 11 is a partial side view in which a part of a rear arm portion of an electric motorcycle showing a configuration of a braking device according to a second embodiment of the present invention is broken.
FIG. 12 is a partial side view in which a part of a rear arm portion of an electric motorcycle showing a configuration of a braking device according to a third embodiment of the present invention is broken.
[Explanation of symbols]
1 Electric motorcycle
24 Rear arm
24a Rear arm rear end
26 Rear wheel
39 Electric motor
39A Rotor (Rotating member)
40 Planetary gear reducer (reduction gear)
47a Rear axle
51 wheel
52 Drum-type rear brake
56 cam
56a Camshaft
60, 62 sector gear (rotation transmission means)
61 Cam lever shaft
63 Cam lever
65 Brake wire
70 Link mechanism (rotation transmission means)
71 Brake arm
72 links
73 Rear fender

Claims (5)

電動モータと該電動モータの回転を減速して後車軸に伝達する減速機を含んで構成される電動パワーユニットをリヤアーム内に組み込み、リヤアームの後部から外側方に突出する前記後車軸の端部に後輪を取り付けて成る電動二輪車において、
前記後車軸は、前記電動モータの回転軸の延伸方向に並ぶよう配置され、前記後輪のホイール内面と前記リヤアームとの間に形成される空間に前記電動モータよりも小径のドラム式ブレーキを配置するとともに、該ドラム式ブレーキのカム軸を前記電動モータの外径の内側において、カムレバー軸を前記電動モータの外径の外側において、それぞれ前記電動モータの回転軸に平行に配置し、前記カム軸と前記カムレバー軸を後車軸の径方向にオフセットして前記リヤアームに回動可能に取り付け、両者を回転伝達手段にて連結したことを特徴とする電動二輪車の制動装置。An electric power unit including an electric motor and a speed reducer that decelerates the rotation of the electric motor and transmits it to the rear axle is incorporated in the rear arm, and the rear axle protrudes outward from the rear portion of the rear arm. In an electric motorcycle with wheels attached,
The rear axle is arranged so as to be aligned in the extending direction of the rotating shaft of the electric motor, and a drum brake having a smaller diameter than the electric motor is arranged in a space formed between the wheel inner surface of the rear wheel and the rear arm. In addition, the cam shaft of the drum brake is disposed on the inner side of the outer diameter of the electric motor, and the cam lever shaft is disposed on the outer side of the outer diameter of the electric motor, in parallel with the rotation shaft of the electric motor. And the cam lever shaft is offset in the radial direction of the rear axle, and is pivotally attached to the rear arm, and both are connected by a rotation transmitting means. 前記回転伝達手段を前記リヤアーム内に配された一対のセクタギヤで構成するとともに、少なくとも一方のセクタギヤを回転部材との干渉を避けて屈曲成形したことを特徴とする請求項１記載の電動二輪車の制動装置。  2. The braking of an electric motorcycle according to claim 1, wherein the rotation transmitting means is composed of a pair of sector gears arranged in the rear arm, and at least one of the sector gears is bent to avoid interference with the rotating member. apparatus. 前記回転伝達手段をリンク機構で構成したことを特徴とする請求項１記載の電動二輪車の制動装置。  2. The braking device for an electric motorcycle according to claim 1, wherein the rotation transmitting means is constituted by a link mechanism. 前記リンク機構の最下端部を前記リヤアームの後端部下縁よりも上側に配置したことを特徴とする請求項３記載の電動二輪車の制動装置。  The braking device for an electric motorcycle according to claim 3, wherein a lowermost end portion of the link mechanism is disposed above a lower edge of a rear end portion of the rear arm. 後輪をその上方から覆うリヤフェンダを前記リヤアームに取り付けるとともに、該リヤフェンダによって前記リンク機構の少なくとも一部をその外方から覆ったことを特徴とする請求項４記載の電動二輪車の制動装置。  5. The braking device for an electric motorcycle according to claim 4, wherein a rear fender that covers the rear wheel from above is attached to the rear arm, and at least a part of the link mechanism is covered from the outside by the rear fender.
JP2002289349A 2001-10-19 2002-10-02 Brake device for electric motorcycle Expired - Fee Related JP4244127B2 (en)

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JP2002289349A JP4244127B2 (en) 2001-10-19 2002-10-02 Brake device for electric motorcycle
TW091123438A TW555668B (en) 2001-10-19 2002-10-11 Braking device for electromotive two-wheeled vehicle
CNB021465053A CN1274976C (en) 2001-10-19 2002-10-17 Brake device for electric two-wheeled cycle

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JP4301060B2 (en) 2004-04-05 2009-07-22 日産自動車株式会社 Rotor structure of axial gap motor
JP5363263B2 (en) * 2009-09-30 2013-12-11 本田技研工業株式会社 Electric vehicle
JP5333266B2 (en) * 2010-01-28 2013-11-06 スズキ株式会社 Brake device for electric motorcycle
JP2012228966A (en) * 2011-04-26 2012-11-22 Alphana Technology Co Ltd In-wheel motor
JP6128582B2 (en) * 2012-11-02 2017-05-17 株式会社ササキコーポレーション Walking blade snow blower
CN112519733B (en) * 2021-01-13 2021-11-19 小呗无限(深圳)科技有限公司 Electric vehicle device suitable for emergency high-efficiency braking

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