201126873 四、指定代表圖： )本案指定代表圖為： 第（1 )圖。 )本代表圖之元件符號簡單說明： 1 0〜輪較軸； 11a、llb~軸承襯套； 12〜輪轂體； 1 2a〜輪轂座； 12b〜輪轂蓋； 1 3~概套； 14〜永久磁石； 15、26、53〜螺帽； 16、17〜定子鐵心； 18 ' 25、27、51〜墊片； 19〜定子； 20~線圈架； 21、2 8〜輪毅螺帽； 22〜線圈； 23〜外蓋； 24~輸出端子部； 29〜端子蓋； 30〜輪轂發電機； 44~前叉； 52〜彈簧墊片； 5 4〜軸承； 56〜軛； 57〜轉子； 72〜導線； 84~筒狀鐵心； 84a、84b〜筒狀鐵心部。 五、本案若有化學辆，請揭移能顯科簡徵的化學式 六、發明說明： 【發明所屬之技術領域】 之自行車用輪轂 本發明係有關於自行車發電機領域中 發電機。 201126873 【先前技術】 習知之自行車用輪轂發電機，是如專利文件丨所示， 由配置於自行車之輪轂體内側之永久磁石，及配置於輪轂 軸上之兩個彼此面向的定子鐵心（Stat〇rC〇re)，且在定子 鐵“之外周上叹置與永久磁石之磁片對向排列著複數個極 片’以及配置於該定子鐵心之間並繞捲著線圈的線圈架 (Cou Bobbin)所構成。再加詳述時，兩個定子鐵心是經由 筒狀鐵心（C〇re)而磁性結合在輪轂軸側’並在位於兩個定 子鐵心間之筒狀鐵心的外側，配置繞捲著線圈之線圈架。 兩個定子鐵心是由一般構造用壓延鋼材所構成，為了 抑制涡電流損失而由貫穿輪轂軸之中心孔朝向外周方向形 成開縫（SI It)。筒狀鐵心將兩個定子鐵心經由磁性予以結 合’且筒狀鐵心是由鐵氧體（Ferrit⑽粉末燒結材或純鐵 系電磁軟鐵材所構成，同樣的為了抑制渦電流損失而在筒 狀鐵心之外周面上形成複數個朝向中心側的複數開縫。 專利文件1 :特開200 1 ~ 3271 39號公報。 【發明内容】 發明所欲解決的課題： 。習知之輪穀發電機，4 了抑㈣電流損失提昇發電效 ，’在定子鐵心及筒狀鐵心上形成開縫，因此產生了難以 維持穩定的定子鐵心、及筒狀鐵心外形尺寸精度的問題。 本發明之目的係為了解決上述之課題，提供一種自行 201126873 車用輪數發電機，不需要在定子鐵心及筒狀鐵心上設置開 縫亦能抑制渴電流損失、提昇發電效率。並能降低輪轂發 電機回轉時之齒槽效應轉矩（Cogging torque)(磁性轉 矩）’而提供一種能輕巧圓滑的回轉之自行車用輪轂發電 機。 用以解決課題的手段： 本明有關之自行車用輪轂發電機，是在輪較體之内側 配置永久磁石，在輪轂軸上配置兩個彼此面向的定子鐵 心’且在定子鐵心之外周上設置與永久磁石之磁片對向排 列的複數個極片，同時在該定子鐵心之間，配置繞捲著線 圈之線圈架的自行車用輪轂發電機，其中前述之兩個定子 鐵心是經由筒狀鐵心而磁性的結合在輪轂軸侧，且前述之 定子鐵心及/或筒狀鐵心是利用壓粉磁心所形成。 刖述之琦狀鐵心可以是在前述定子鐵心上以一體成形 予以作出。在此場合，又以利用前述兩個定子鐵心分別的 以一體成形’各自形成一半的前述筒狀鐵心之方式為佳。 發明效果： 本發明中’兩個定子鐵心及/或筒狀鐵心是利用壓粉磁 心所形成。壓粉磁心是在鐵粉末等的磁性粉末之表面鍍 (Coat ing)上無機絕緣皮膜，而且為了不讓磁性粉末脫離而 利用結合劑（絕緣樹脂）予以結合，然後加壓成形後作出定 子鐵心及筒狀鐵心，由於利用鐵粉末等的磁性粉末與樹脂 加以混合’故會在磁性粒子間形成相互電絕緣，而可以在 磁力線穿過定子鐵心及筒狀鐵心時抑制渦電流之發生。因 201126873 此、可以抑制满電流之發生而提昇發電效率，又由於抑制 了渴電流而沒有在定子鐵心及筒狀鐵心上形成開縫的必 要，並且可以讓定子鐵心及筒狀鐵心具有穩定的外形尺寸 精度。 、 此外、因為能夠提昇發電效率，故為了達到相同的輸 出也可以抑制配置於輪轂體内側之永久磁石的磁力，而 可以降低磁性轉矩減少回轉輪穀發電機時所需要之回轉 力，並得以獲得輕巧圓滑的回轉（車輪之回轉）。 又由於壓粉磁心並非是利用磁性粉末彼此直接結合作 成相車乂方；鐵氧體系粉末燒結材及電磁鋼板具有磁力流通 較為和緩的特徵。欲達成輪穀發電機之小型輕量化時，在 輪轂體内側配置之永久磁石必須是例如鈥(Ne—m)磁 石般的高磁力磁石，雖'然是使用高磁力之永久磁石，也可 以經由壓粉磁心内磁力綠々i心 線之和缓W動，而降低輪穀發電機 回轉時之齒槽效應轉矩（磁性轉矩），並獲得輕巧圓滑的回 轉。 又由於壓粉磁心能夠形成各種的3次元形狀，故可以 將筒狀鐵心利用前述定子鐵心以一體成形予以作出，而能 $ y it件數至2件°在此場合’如利用兩個定子鐵心分別 的以-體方式形成一半的筒狀鐵心，京尤可以達成元件之共 用化。 【實施方式】 第 1圖為本發明相 關輪轂發電機（30 )，在輪轂軸（包含 201126873 輪轂軸）方向之單側（上部）剖面圖，第2圖為定子（i9)之正 面刀解剖面圖’第3圖為定子鐵心(16)(17)之側面視圖， 第4圖為定子（19)之局部放大立體圖，第5圖為搭載輪較 發電機（30)自行車（40)之前輪部分之放大視圖。 本發明相關之輪轂發電機（30)係搭载於自行車（4〇)之 前輪部分或是後輪部分。以下就針對在前輪側搭載輪較發 電機（3 0)之事例加以說明。 自行車（40)是如第5圖所示，其中支持著前輪㈠2)自 由回轉之輪轂軸（1〇)是組裝於前叉（Fr〇nt f〇rk)(44)上， 輪轂發電機（30)供給電力至配備於前輪（42)之橫側上的前 照燈（46)及配備於後輪側之尾燈（圖中未顯示）。前叉（44) 疋由車架本體（Frame)(48)所支持，並在前叉（44)之上端組 裝手把（Handle) (50)。圖中（52)所示為前置物籃。 如第1圖所示，輪轂軸（1〇)是兩側固定在前又（44)(44) 上’並夾介著軸承（54)(54)而將自由回轉之輪轂體（12)組 裝在輪穀轴（10)上。 再加詳述時，輪毅體（12)是由輪轂座（i2a)及輪轂蓋 (12b)所構成’輪轂座（i2a)之一端是夾介著一方的軸承（54) 及固定於輪轂軸（10)上之軸承襯套（Ua)而被支持在輪穀 軸（10)上，它端是呈開放狀態，輪轂蓋（12b)則是被壓入輪 轂座（1 2a)之它端開放部中並塞住開放部，並夾介著它方的 軸承（54)及固定於輪轂軸（1〇)上之軸承襯套（llb)而被支 持在輪轂軸（1 0)上。 輪穀軸（10)中突出於軸承襯套（lla)外之部分，是夾介 6 201126873 者螺帽(15)而穿過一方的前又(44)前端，再穿過墊片（⑻ 及輪較螺帽（21)，並經由鎖緊輪較螺帽（21)之方式，而將 輪較軸（1D)之-端側固定在_方之前又⑽上。並利用外 蓋（23)將軸承襯套（lla)及螺帽（15)覆蓋起來。 i在輪毅軸（1G)之它端側中突出於軸承襯套⑴b)外之 邛刀，疋失介著襯套（13)、輸出端子部（24)、墊片（25)、 螺帽（26)而穿過它方的前又（44)前端’再穿過墊片（27)及 輪轂螺帽（28)，並經由鎖緊輪轂螺帽（28)之方式，而將輪 穀軸（1G)之它端側固定在它方之前叉（44)上。並利用端子 蓋（29)將輸出端子部（24)、墊片（25)、螺帽（26)覆蓋起來。 輪轂座（12a)上組裝著複數支輪輻（Sp〇ke)(56)，該輪 輻（56)之前端，是如第5圖所示，夾介著輪緣（Rim)(58) 而組裝在輪胎（60)上。 在輪轂軸（10)上配置定子（19)。定子（19)是由左右一 對之定子鐵心（16)(17)、線圈架（2〇)及線圈（22)所構成。 定子鐵心（1 6 )(1 7)是分別如第2圖、第3圖所示，在 圓盤體（80) (81)之外周，突出設置著多數往内折曲的極片 (74、75)。在定子鐵心（1 6)的極片（74)之間，安置著相互 對向之它方定子鐵心（17)的極片（75)，並配置成沿著極片 (74)(75)圓周方向留存有相等間隔之間隙。在圓盤體 (8 0)(81)之中心部形成讓輪穀軸（1 〇)通過的中心孔 (82)(83)。在圓盤體（80)(81)上中心孔（82)(83)之外側， 以一體成形方式由圓盤體（80)(81)往内而突出設置筒狀鐵 心部（84a)(84b)，筒狀鐵心部（84a)(84b)之前端相互接 201126873 觸’讓定子鐵心（16 ) (1 7 )間形成磁性結合。各筒狀鐵心部 (84a)(84b)是以相同長度來朝向内側突出，並由各筒狀鐵 心部（84a)(84b)合併構成一個筒狀鐵心（84)，而筒狀鐵心 (84)的兩個半邊是由各自突出設置於定子鐵心（16)(17) 中。 在位於上述定子鐵心（16)(17)間之筒狀鐵心部 (84a)(84b)的外周，配置用來容納發電線圈（22)之線圈架 (20)。以此方式，將配置著線圈（22)之定子（19)穿過輪轂 軸（10) ’直到定子鐵心（17)接觸及軸承襯套（iib)為止，然 後夾介·著墊片（51)、彈簧墊片（52)並利用螺帽（53)予以鎖 緊後’就可以將定子（1 9)組裝於輪轂軸（1 〇)上。 線圈（2 2)中電線端部之一方，是經由導線（7 2)而連接 至輸出端子部（24),再從輸出端子部（24)連接至前照燈（46) 上而匕方則直接連接至輪轂軸（10)等，並經由前又（44) 而與前照燈（46)形成電的連接。在軸承襯套（nb)上並形成 用來將導線（72)導引至輸出端子（24)之溝槽。 在輪轂體（12)上配置轉子（57)。轉子（57)是由沿著圓 周方向排列於輪轂座（12a)内周面上的永久磁石（14)所構 成，且水久磁石（14)是夾介著軛（Y〇ke)(56)而與前述定子 鐵心（16)(17)之極片（74)(75)相互對應並數量上相同。該 永久磁石（14)是於内面側交互的配置N極及s極。 在具有上述構造之輪轂發電機（3〇)中，當自行車（4〇) 行走並驅動車輪（前輪（42))回轉時，轉子（57)會相對於定 子（19)而回轉。其結果，就讓永久磁石（14)沿著定子鐵心 201126873 (16)(17)之極片（74)( 75)的外側移動。 當一方之定子鐵心（16)的極片（74)，是與永久磁石（14) 的N極相互對向之時，它方之定子鐵心（17)的極片（75), 則疋與永久磁石（14 )的S極相互對向，就會形成通過一方 之定子鐵心（1 6 )的極片（7 4 )—圓盤體（8 〇 )—筒狀鐵心部 (84a)—相互對向之它方定子鐵心（丨7)的筒狀鐵心部（8“） —圓盤體（81)〜極片（75)的磁力線。 再回轉前輪（42)的話，一方之定子鐵心㈠的極片 會與s極相互對向，而它方之定子鐵心（17)的極片（75)則 是與N極相互對向，此時就會形成與.上述反向，通過定子 鐵心（π)的極片（75)—圓盤體（81)〜筒狀鐵心部（84b) — 相互對向之定子鐵心（16)的筒狀鐵心部圓盤體（8〇) —極片（7 4)的磁力線。 伴隨著4輪（4 2)之回轉，而使得與定子鐵心（1 6)(1 7) 之極片（ 74) (75)相互對向的永久磁石（14)產生極性的變 化，而父互的形成上述磁力線，即所謂交流磁力線。經由 通過定子鐵心（16)(17)及筒狀鐵心部（84a)(84b)之交流磁 力線’而在線圈（2 2)上產生電流進行發電。 然而' 交流磁力線也會在定子鐵心（16)(17)上產生渦 電流，而造成渦電流損失。如欲提昇發電效率時就必須減 少此渦電流損失。因此在本發明中’著眼於定子鐵心 (16)(17)之材質，而使用壓粉磁心作為定子鐵心g㈠（I” 之材質。以壓粉磁心而言’可以採用例如公司之 SOMALOY500j SOMALOY700」、或日立粉末冶金株式 201126873 會社之「EU-65」「Εϋ —67」等。 壓粉磁心是在織金、士 刀末·#的磁性粉末之表面鍍上無機嚷 緣皮膜’而且為了不讜讲u · 系磁性粉末脫離而利用結合劑（絕緣樹 脂）予以結合，秋接；、 …、曼予以加壓成形後作出定子鐵心 (16)(17)。由於利用雜土 鐵私末4的磁性粉末與樹脂加以混 合’故會在磁性粒子間报 卞Π ^成相互電絕緣，而可以在磁力 流過定子鐵心（1 6 ) Π 7、— η 6)(17)之圓盤體（80)(81)及筒狀鐵心部 (84a) (84b)時抑制渦電流之發生。 因此就可以抑㈣渦電流損失之發生而提昇發 此外亦不需要如先前技術中所述的，$ 了抑㈣電流而在 定子鐵心（16)(17)中之圓盤體⑽)(81)及筒狀鐵心部 (84a)(84b)上形成開縫，故可以達成定子鐵心（16)(丨乃外 形尺寸精度之穩定化。 此外，雖然可以為了提昇發電效率而加強永久磁石之 磁力，但使用強磁力磁石後磁性轉矩會增大，轉動輪轂發 電機所需要的回轉力亦隨之增大，而產生了回轉車輪時力 罝沉重的問題，此時如採用由壓粉磁心作成之定子鐵心 (16)(17)，由於渦電流損失受到抑制，故可以在獲得相同 輸出之下’將永久磁石之磁力需求予以降低，而能夠減少 磁性轉矩之發生並降低轉動輪轂發電機時所需之回轉力， 讓車輪得以輕巧且圓滑的回轉。 又由於壓粉磁心是利用磁性粉末與樹脂等的絕緣物加 以混合並/旋固後所作成’故具有高度的形狀可塑性。故、 將定子鐵心（16)(17)予以磁性結合起來之筒狀鐵心（84)， 10 201126873 就無必要是如先前技術中所述的，必須作成與定子鐵心相 互分開的形體’就如本發明之實施例中所示，能輕易的在 定子鐵心（1 6 )( 1 7 )上以一體成形方式作出筒狀鐵心部 (8 4 a ) (8 4 b )，而可以減少元件之個數。 在此場合，如實施例中所示，分別從定子鐵心（丨6)(丨7) 中各自突出設置一半的筒狀鐵心部（84a)(84b)時，就能方 便的達成定子鐵心（1 6)(1 7 )之元件共用化。當然，突出設 置之長度亦不以各自一半為限，也可以僅在定子鐵心 (1 6)(1 7)中之任一方來利用一體成形方式突出設置筒狀鐵 心 〇 在以上之實施例中，雖然是在定子鐵心（i 6)(丨7)上以 一體成形方式突出設置筒狀鐵心（84)，亦可以利用壓粉磁 心來分開形成與定子鐵心（丨6 Μ丨7)不同形體的筒狀鐵心。 第6圖所示即為此種場合時之定子（丨9)的正面分解剖面 圖’第7圖所示為定子鐵心之側面視圖。此定子鐵心 (16) (17)是利用分開形體的筒狀鐵心（84)來將定子鐵心 (16)(17)磁性結合起來。在第6圖、第7圖中，與第1圖 至第4圖中相等之物，是付予相同之符號。在此場合，元 件之個數雖然增加，但形狀變得較為單純，故可以提昇模 具的加工性及成形加工性。 此外，雖然以抑制渦電流損失而言，效果上可能多少 車又為低劣’但疋也可以利用壓粉磁心來僅至少形成定子鐵 心（16)(17)或是筒狀鐵心（84)中之任一方。 第8圖至第11圖中，顯示利用壓粉磁心材來形成筒狀 11 201126873 鐵心（84)，而採用電磁軟鐵板或一般壓延鋼板來形成定子 鐵心（16)(17)之實施例。圖中，相等之物是付予與第丄圖 至第7圖中相同之符號。 由於定子鐵心（16)(17)是利用電磁軟鐵板或—般壓延 鋼板所形成，故為了抑制渦電流之發生’是如第1丨圖所 示’在定子鐵心（16)(17)之圓盤體（80)(81)上，形成從中 心孔（82)(83)朝向外周方向之開縫（86)(87)。並於開縫 (86)(87)之途中形成讓導線（72)穿過的圓孔部（9〇)。 在琦狀鐵心（8 4)之外周，設置一條朝向輪穀軸（1 〇)方 向之溝（88)，並利用此溝（88)，讓突出設置於線圈架（2〇) 内側之肋（89)，鑲嵌於溝中並讓線圈架（2〇)可以定位。 又’為了達成輪毅發電機之小型化、輕量化，在永久 磁石（14)上疋採用具有強磁力之銳磁石。當使用具有強磁 力之磁石作為永久磁石（14)，使得磁性轉矩增大，讓轉動 輪轂發電機所需之回轉力隨之加大，而產生車輪回轉沉重 問題之時’可以經由壓粉磁心之特性，讓磁性轉矩不致於 變大。 亦即’如第1 2圖中所示’由使用壓粉磁心及使用壓粉 磁心以外材料之磁化曲線即可明瞭，由於壓粉磁心中之磁 性粉末間並未直接結合，故相較於鐵氧體系粉末燒結材或 電磁鋼板時具有磁力流通較為和緩之特徵。因此即使是使 用能磁石等具有強磁力之磁石，亦可經由壓粉磁心中和緩 流動的磁力線，來降低輪轂發電機回轉時產生之磁性轉 矩，而得以輕巧且圓滑的回轉。又在第12圖中，曲線A係 12 201126873 顯示電磁鋼板之特性，曲線β传 β保顯不一般壓延鋼板之特 性，曲線C係顯示壓粉磁心之鞞枓，ώh i符Γ生’曲線D係顯示軟性鐵 氧體之特性。 以此方式，使用具有強磁力之磁石作為永久磁石來達 成輪數發電機之小型化、輕量化之時，經由使用壓粉磁心 材作成筒狀鐵心(84)’可以降低磁性轉矩，而能夠輕巧且 圓π的回轉，同時亦可以抑制渴雷# % & ^ I利凋黾々丨·扣失、提昇發電效率。 除筒狀鐵心（8 4 )外，利用壓粉絲、、U jjy J_、^ B i杨磁〜材形成定子鐵心（16)(17) 之場合，亦同樣適用。 產業上之可利用性 本發明係適用於可以提異菸雪 電機 攸幵發冤效率之自行車用輪轂發 【圖式簡單說明】 第1圖係本發明相關輪私 > & * X發電機，在輪穀軸（包含輪穀 軸）方向之單側（上部）剖面圖。 第2圖係該輪轂發電機 ^ τ 疋千之正面分解剖面圖。 第3圖係該輪轂發電機 y ^ r 又十鐵心之側面視圖。 第4圖係該輪轂發電機 ^ τ 疋千之局部放大立體圖。 第5圖係搭載該輪轂 «电微ι自仃車刖輪部分的面 放大視圖。 定子之正面分解剖面圖 ’定子鐵心之側面視圖 第6圖係在其它實施例中， 第7圖係在該其它實施例中 201126873 第8圖係在另外之其它實施例中，輪轂發電 輪轂軸方向之單側（上部）剖面圖。 機1之包含 第9圖係在該另外之其它實施例之輪轂 X電機φ 8圖中A-A線剖面圖。 甲’第 第10圖係在該另外之其它實施例中，輪數發 之正面分解剖面圖。 電機定子 第11圖係在該另外之其它實施例中，輪數發 鐵心之側面視圖。 電機定子 第12圖係輪轂發電機中，定子鐵心材料少4 夂特性圖。 【主要元件符號說明】 14〜永久磁石； 16、17〜定子鐵心， 22~線圈； 84〜筒狀鐵心； 12〜輪轂體；. 10〜輪轂軸； 20~線圈架； 74、75~極片； 84a、84b -筒狀鐵心部。 14201126873 IV. Designated representative map: ) The representative representative figure of this case is: (1). The symbol of the symbol of this representative figure is simple: 1 0~ wheel is relatively axis; 11a, llb~ bearing bushing; 12~ hub body; 1 2a~ hub seat; 12b~ hub cap; 1 3~ set; Magnet; 15, 26, 53 ~ nut; 16, 17 ~ stator core; 18 '25, 27, 51 ~ gasket; 19 ~ stator; 20 ~ coil frame; 21, 2 8 ~ wheel nut; 22~ Coil; 23~ outer cover; 24~ output terminal; 29~ terminal cover; 30~ hub generator; 44~ front fork; 52~ spring washer; 5 4~ bearing; 56~ yoke; 57~ rotor; Wire; 84~ cylindrical core; 84a, 84b ~ cylindrical core. 5. If there is a chemical vehicle in this case, please uncover the chemical formula of the syllabus. VI. Description of the invention: [Technical field of the invention] Bicycle wheel The present invention relates to a generator in the field of bicycle generators. 201126873 [Prior Art] A conventional bicycle hub generator is a permanent magnet disposed inside a hub body of a bicycle as shown in the patent document ,, and two stator cores facing each other disposed on the hub axle (Stat〇) rC〇re), and on the outer circumference of the stator iron, a plurality of pole pieces are arranged opposite to the magnetic piece of the permanent magnet, and a bobbin disposed between the stator core and wound around the coil (Cou Bobbin) In the detailed description, the two stator cores are magnetically coupled to the hub shaft side via a cylindrical core and are disposed outside the cylindrical core between the two stator cores. Coil bobbin. The two stator cores are made of rolled steel for general construction. In order to suppress eddy current loss, a slit (SI It) is formed in the outer circumferential direction through the center hole of the hub shaft. The cylindrical core has two stators. The core is bonded by magnetic force' and the cylindrical core is composed of ferrite (Ferrit (10) powder sintered material or pure iron-based electromagnetic soft iron material, and the same in order to suppress eddy current loss in the cylindrical iron A plurality of slits facing the center side are formed on the outer peripheral surface of the heart. Patent Document 1: JP-A-2001 - 3271 39. SUMMARY OF THE INVENTION PROBLEMS TO BE SOLVED BY THE INVENTION: A conventional wheel generator, 4 (4) The current loss improves the power generation efficiency, and 'the slit is formed in the stator core and the cylindrical core, so that it is difficult to maintain the stability of the stator core and the dimensional accuracy of the cylindrical core. The object of the present invention is to solve the above problem. The problem is to provide a self-propelled 201126873 motor wheel generator that eliminates the need to provide slits on the stator core and the cylindrical core to suppress the loss of thirsty current and improve the power generation efficiency. It can also reduce the cogging effect when the hub generator rotates. Cogging torque (magnetic torque)' provides a bicycle hub generator that can be lightly and smoothly rotated. Means for solving the problem: The bicycle hub generator of the present invention is in the wheel. A permanent magnet is disposed on the inner side, and two stator cores facing each other are disposed on the hub axle and are disposed on the outer circumference of the stator core and the permanent magnet a plurality of pole pieces arranged in opposite directions of the magnetic sheet, and a bicycle hub generator of the coil bobbin wound around the coil is disposed between the stator cores, wherein the two stator cores are magnetically coupled via the cylindrical core On the hub shaft side, the stator core and/or the cylindrical core described above are formed by a powder magnetic core. The Qi-shaped iron core described above may be integrally formed on the stator core. In this case, it is utilized. It is preferable that the two stator cores are integrally formed 'integrally formed into the half of the cylindrical core. Effect of the invention: In the present invention, the two stator cores and/or the cylindrical core are formed by a powder magnetic core. The powder core is an inorganic insulating film on the surface of a magnetic powder such as iron powder, and is bonded by a bonding agent (insulating resin) in order to prevent the magnetic powder from being detached, and then formed into a stator core and a cylinder by press molding. The core is made of a magnetic powder such as iron powder mixed with a resin, so that it is electrically insulated from each other between the magnetic particles, and can be magnetically When the force wire passes through the stator core and the cylindrical core, the occurrence of eddy current is suppressed. Because of 201126873, it is possible to suppress the occurrence of full current and improve the power generation efficiency, and it is not necessary to form a slit on the stator core and the cylindrical core due to suppression of the thirst current, and the stator core and the cylindrical core can have a stable shape. Dimensional accuracy. In addition, since the power generation efficiency can be improved, the magnetic force of the permanent magnet disposed inside the hub body can be suppressed in order to achieve the same output, and the magnetic torque can be reduced to reduce the turning force required for the rotary wheel generator. A light and smooth turn (turning of the wheel) is obtained. Moreover, since the powder magnetic core is not directly bonded to each other by the magnetic powder, the ferrite-based powder sintered material and the electromagnetic steel sheet have the characteristics of relatively gentle magnetic flow. In order to achieve the small size and light weight of the wheel generator, the permanent magnet placed inside the hub body must be a high magnetic magnet such as a neon (Ne-m) magnet, although it is a permanent magnet using a high magnetic force. In the magnetic core of the powder magnetic core, the sum of the heart-line and the heart-wound is slow, and the cogging torque (magnetic torque) when the wheel generator is rotated is reduced, and a light and smooth rotation is obtained. Moreover, since the powder magnetic core can form various three-dimensional shapes, the cylindrical core can be formed by integrally forming the stator core, and the number of pieces can be y it to two pieces. In this case, the two stator cores are used. By separately forming a half-shaped tubular core in a body-like manner, Jingyou can achieve the sharing of components. [Embodiment] Fig. 1 is a one-side (upper) sectional view of a hub-and-wheel generator (30) in the direction of a hub axle (including a 201126873 hub axle), and Figure 2 is a frontal knife anatomy of a stator (i9). Fig. 3 is a side view of the stator core (16) (17), Fig. 4 is a partially enlarged perspective view of the stator (19), and Fig. 5 is a front wheel portion of the bicycle (40) of the generator wheel (30) Magnified view. The hub generator (30) according to the present invention is mounted on a front wheel portion or a rear wheel portion of a bicycle (4 turns). The following is an explanation of an example in which the wheel is mounted on the front wheel side (3 0). The bicycle (40) is as shown in Fig. 5, in which the front wheel (1) 2) freely rotatable hub shaft (1〇) is assembled on the front fork (Fr〇nt f〇rk) (44), the hub generator (30) The power is supplied to the headlights (46) provided on the lateral side of the front wheel (42) and the taillights (not shown) provided on the rear wheel side. The front fork (44) is supported by the frame (48) and a handle (50) is assembled on the upper end of the front fork (44). The front basket is shown in (52) of the figure. As shown in Fig. 1, the hub axle (1〇) is assembled on the front side (44) (44) and is assembled with the bearing (54) (54) to assemble the freely rotatable hub body (12). On the wheel axis (10). In more detail, the wheel body (12) is formed by the hub seat (i2a) and the hub cap (12b). One end of the hub seat (i2a) is a bearing (54) sandwiched between one side and fixed to the hub axle. (10) The upper bearing bushing (Ua) is supported on the wheel shaft (10), the end is open, and the hub cap (12b) is pressed into the hub seat (12a). The opening portion is plugged in the portion, and the bearing (54) and the bearing bush (llb) fixed to the hub shaft (1) are supported on the hub shaft (10). The portion of the wheel valley shaft (10) that protrudes beyond the bearing bushing (lla) is the nut (15) that passes through one of the front ends (44) and then passes through the gasket ((8) and The wheel is compared with the nut (21), and the end of the wheel (1D) is fixed to the front side of the wheel (1) via the locking wheel (21). The outer cover (23) is used. Cover the bearing bushing (lla) and the nut (15). i protrude from the outer side of the bearing bushing (1) b) on the end side of the wheel shaft (1G), and the bushing (13) The output terminal portion (24), the spacer (25), the nut (26) and the front end (44) of the other end pass through the spacer (27) and the hub nut (28), and via The hub nut (28) is locked in a manner that the other end side of the wheel shaft (1G) is fixed to its front fork (44). The output terminal portion (24), the spacer (25), and the nut (26) are covered by the terminal cover (29). A plurality of spokes (56) are assembled on the hub seat (12a), and the front end of the spoke (56) is assembled as shown in Fig. 5 through a rim (Rim) (58). On the tire (60). A stator (19) is disposed on the hub axle (10). The stator (19) is composed of a pair of left and right stator cores (16) (17), a bobbin (2 turns), and a coil (22). As shown in FIGS. 2 and 3, the stator cores (1 6 ) (17) are respectively provided with a plurality of pole pieces bent inwardly on the outer circumference of the disk body (80) (81). 75). Between the pole pieces (74) of the stator core (16), pole pieces (75) of the stator cores (17) facing each other are disposed and arranged along the circumference of the pole pieces (74) (75) The direction retains equally spaced gaps. A center hole (82) (83) through which the wheel axis (1 〇) passes is formed at the center portion of the disk body (80) (81). On the outer side of the center hole (82) (83) on the disk body (80) (81), a cylindrical core portion (84a) is protruded inwardly from the disk body (80) (81) in an integrally formed manner (84b) The front ends of the cylindrical core portions (84a) (84b) are connected to each other at 201126873 to form a magnetic bond between the stator cores (16) (17). Each of the cylindrical core portions (84a) (84b) protrudes inwardly by the same length, and is combined with each of the cylindrical core portions (84a) (84b) to form a cylindrical core (84), and the cylindrical core (84) The two halves are each protruded from the stator core (16) (17). A bobbin (20) for accommodating the power generating coil (22) is disposed on the outer circumference of the cylindrical core portion (84a) (84b) between the stator cores (16) and (17). In this way, the stator (19) in which the coil (22) is disposed is passed through the hub axle (10)' until the stator core (17) contacts and the bearing bush (iib), and then the spacer (51) is sandwiched. The spring washer (52) is locked by the nut (53) and the stator (1 9) can be assembled on the hub axle (1 〇). One of the ends of the electric wires in the coil (22) is connected to the output terminal portion (24) via a wire (72), and is connected to the headlight (46) from the output terminal portion (24). Directly connected to the hub axle (10), etc., and electrically connected to the headlamps (46) via the front (44). A groove is formed on the bearing bushing (nb) for guiding the wire (72) to the output terminal (24). A rotor (57) is disposed on the hub body (12). The rotor (57) is composed of a permanent magnet (14) arranged in the circumferential direction on the inner circumferential surface of the hub seat (12a), and the long-lasting magnet (14) is interposed between the yokes (Y〇ke) (56). The pole pieces (74) (75) of the stator core (16) (17) correspond to each other and are the same in number. The permanent magnet (14) is an N pole and an s pole that are arranged to interact on the inner surface side. In the hub generator (3〇) having the above configuration, when the bicycle (4〇) travels and drives the wheel (front wheel (42)) to rotate, the rotor (57) is swung relative to the stator (19). As a result, the permanent magnet (14) is moved along the outer side of the pole piece (74) (75) of the stator core 201126873 (16) (17). When the pole piece (74) of one of the stator cores (16) is opposite to the N pole of the permanent magnet (14), the pole piece (75) of the stator core (17) is 疋 and permanent. When the S poles of the magnets (14) oppose each other, a pole piece (74) that passes through one of the stator cores (16) - a disk body (8 〇) - a cylindrical core portion (84a) - oppose each other The cylindrical core portion (8") of the stator core (丨7) is the magnetic field line of the disk body (81) to the pole piece (75). When the front wheel (42) is rotated, the stator core of one of the stator cores (1) Will be opposite to the s pole, and the pole piece (75) of the stator core (17) of the square is opposite to the N pole, and the opposite direction is formed through the stator core (π). Pole piece (75) - disc body (81) - cylindrical core portion (84b) - cylindrical core disc body (8 〇) of the stator core (16) facing each other - pole piece (7 4) Magnetic field line. With the rotation of 4 wheels (42), the permanent magnet (14) opposite to the pole piece (74) (75) of the stator core (1 6) (17) is changed in polarity, and The mutual formation of the above magnetic lines of force That is, the alternating magnetic field line generates electricity by generating an electric current through the stator core (16) (17) and the alternating magnetic field line ' of the cylindrical core portion (84a) (84b) to generate electricity. However, the alternating magnetic line of force is also An eddy current is generated in the stator core (16) (17), causing eddy current loss. If the power generation efficiency is to be increased, the eddy current loss must be reduced. Therefore, in the present invention, the focus is on the stator core (16) (17). The material is used, and the powder core is used as the material of the stator core g(I) (I). For the powder core, for example, the company's SOMALOY500j SOMALOY700 can be used, or the Hitachi Powder Metallurgy Co., Ltd. 201126873 club "EU-65" "Εϋ-67 "The powder magnetic core is coated with an inorganic enamel film on the surface of the magnetic powder of the woven gold and the knives, and is combined with a bonding agent (insulating resin) in order to prevent the magnetic powder from detaching. In the autumn, the stator core (16) (17) is formed by pressure molding. Since the magnetic powder of the heterogeneous iron 4 is mixed with the resin, it will be reported between the magnetic particles. Insulation, and eddy current can be suppressed when magnetic force flows through the disk body (80) (81) of the stator core (1 6 ) Π 7, η 6) (17) and the cylindrical core portion (84a) (84b). occur. Therefore, it is possible to suppress the occurrence of eddy current loss and increase the hair. Furthermore, the disk body (10) in the stator core (16) (17) (81) is not required as described in the prior art. The slit is formed in the cylindrical core portion (84a) (84b), so that the stator core (16) can be stabilized (the dimensional accuracy of the stator is stabilized. Further, although the magnetic force of the permanent magnet can be enhanced to improve the power generation efficiency, After using the strong magnetic magnet, the magnetic torque will increase, and the rotating force required to rotate the hub generator will also increase, which will cause the problem of heavy force when the wheel is rotated. At this time, if the stator is made of powder magnetic core The core (16) (17), because the eddy current loss is suppressed, it is possible to reduce the magnetic force requirement of the permanent magnet under the same output, thereby reducing the occurrence of magnetic torque and reducing the need to rotate the hub generator. The turning force allows the wheel to be lightly and smoothly rotated. Since the powder magnetic core is made by mixing and/or screwing the magnetic powder and the resin, it has a high degree of shape plasticity. A cylindrical core (84) that magnetically couples the stator cores (16) (17), 10 201126873 is not necessarily formed as a body separate from the stator core as described in the prior art. As shown in the embodiment, the cylindrical core portion (8 4 a ) (8 4 b ) can be easily formed integrally on the stator core (16) (17), and the number of components can be reduced. In this case, as shown in the embodiment, when the half of the cylindrical core portions (84a) (84b) are respectively protruded from the stator cores (丨6) (丨7), the stator core can be easily realized (1). 6) The components of (1 7 ) are shared. Of course, the length of the protruding arrangement is not limited to half of each, and it may be provided by one of the stator cores (1 6) (17) in one piece. In the above embodiment, although the cylindrical core (84) is integrally formed on the stator core (i 6) (丨7), the powder core can be used to separately form the stator core. (丨6 Μ丨7) The cylindrical core of different shapes. This is shown in Figure 6. In the case of the case, the front side exploded view of the stator (丨9) is shown in a side view of the stator core. The stator core (16) (17) is a cylindrical core (84) that separates the stator core. (16) (17) Magnetically combined. In Fig. 6 and Fig. 7, objects equivalent to those in Figs. 1 to 4 are given the same symbols. In this case, the number of components is increased. However, the shape becomes simpler, so that the moldability and the formability of the mold can be improved. In addition, although the eddy current loss is suppressed, the effect may be inferior to the number of cars, but the powder core may be used only by the powder core. At least one of the stator core (16) (17) or the cylindrical core (84) is formed. In Figs. 8 to 11, there is shown an embodiment in which a cylindrical magnetic core material is used to form a cylindrical 11 201126873 core (84), and an electromagnetic soft iron plate or a generally rolled steel plate is used to form the stator core (16) (17). In the figure, the equivalent is given to the same symbols as in the first to seventh figures. Since the stator core (16) (17) is formed by an electromagnetic soft iron plate or a general rolled steel plate, in order to suppress the occurrence of eddy currents, it is as shown in Fig. 1 'in the stator core (16) (17). On the disk body (80) (81), a slit (86) (87) is formed from the center hole (82) (83) toward the outer circumferential direction. A circular hole portion (9 turns) through which the wire (72) passes is formed on the way of the slit (86) (87). On the outer circumference of the Qi-shaped iron core (8 4), a groove (88) facing the direction of the wheel axis (1 〇) is provided, and the groove (88) is used to make the rib protruding on the inner side of the bobbin (2〇) ( 89), set in the groove and let the coil frame (2〇) be positioned. In order to achieve the miniaturization and weight reduction of the wheel generator, a magnet with a strong magnetic force is used on the permanent magnet (14). When a magnet with a strong magnetic force is used as the permanent magnet (14), the magnetic torque is increased, so that the required turning force of the rotating hub generator is increased, and when the problem of heavy wheel rotation is generated, the powder core can be passed through The characteristics are such that the magnetic torque does not become large. That is, 'as shown in Fig. 2', the magnetization curve of the material other than the powder core and the powder core can be used. Since the magnetic powder in the powder core is not directly combined, it is compared with iron. In the case of an oxygen system powder sintered material or an electromagnetic steel sheet, magnetic flux is relatively gentle. Therefore, even if a magnet having a strong magnetic force such as a magnet can be used, the magnetic torque generated by the rotation of the hub generator can be reduced by the magnetic flux line in the dust core, and the light and smooth rotation can be achieved. In Fig. 12, the curve A system 12 201126873 shows the characteristics of the electromagnetic steel plate, the curve β transmission β shows the characteristics of the non-normally rolled steel plate, and the curve C shows the 压 压 h i Γ ' 'curve D It shows the characteristics of soft ferrite. In this way, when a magnet having a strong magnetic force is used as the permanent magnet to achieve miniaturization and weight reduction of the number of generators, the magnetic core torque (84) can be reduced by using the powder magnetic core material to reduce the magnetic torque. Lightweight and round π rotation, it can also suppress thirsty thunder # % & ^ I Li 黾々丨 黾々丨 扣 扣 扣 扣 、 、 扣 扣 、 、 扣 扣 扣 扣 扣 扣In addition to the cylindrical core (8 4 ), the stator core (16) (17) is formed by pressing the fan, U jjy J_, ^ B i Yang magnetic material, and the same applies. INDUSTRIAL APPLICABILITY The present invention is applicable to a bicycle wheel that can improve the efficiency of a cigarette motor. [Simplified description of the drawing] Fig. 1 is a related wheel of the invention>& * X generator A one-sided (upper) sectional view of the direction of the valley shaft (including the valley axis). Figure 2 is a front exploded view of the hub generator ^ τ 疋 thousand. Figure 3 is a side view of the hub generator y ^ r and ten cores. Figure 4 is a partially enlarged perspective view of the hub generator ^ τ 疋 thousand. Figure 5 is a magnified view of the surface of the part of the «Electric ι 仃 仃 刖 。 wheel. Front side exploded view of the stator 'Side view of the stator core Fig. 6 is in other embodiments, Fig. 7 is in this other embodiment, 201126873 Fig. 8 in still other embodiments, the hub is generating the hub axis direction One-sided (upper) section view. Included in Fig. 9 is a cross-sectional view taken along line A-A of the hub X motor φ 8 of the other embodiment. A' Fig. 10 is a front exploded cross-sectional view showing the number of rounds in the other embodiment. Motor Stator Figure 11 is a side elevational view of the wheel core in this other embodiment. Motor Stator Figure 12 shows the stator core material with a minimum of 4 夂 characteristic diagram. [Main component symbol description] 14~ permanent magnet; 16, 17~ stator core, 22~ coil; 84~ tubular core; 12~ hub body;. 10~ hub axle; 20~ coil bobbin; 74, 75~ pole piece 84a, 84b - cylindrical core. 14