201219239 六、發明說明： 【發明所屬之技術領域】 本發明是關於自行車用輪轂，尤其是可安裝煞車裝置 . 的自行車用輪轂。 【先前技術】 作爲自行車用輪轂煞車裝置，已知有碟煞系統，通常 是具備有：安裝在自行車用框架而與煞車柄連結的卡鉗、 以及碟煞轉子。碟煞轉子，是固定地連結在：於自行車的 車輪的中間部處設置的自行車用碟煞輪轂。 習知的自行車用碟煞輪轂，一般是具備有：不能旋轉 地安裝於自行車的框架的輪轂軸、輪轂殼罩、轉子安裝部 (煞車安裝部的一個例子）、以及左右的一對軸承（參考 專利文獻1及2)。輪轂殼罩，在輪轂軸的外周側相對於輪 ζ 轂軸安裝成可自由旋轉。輪轂殼罩，是具有：一對凸緣部 、與設置在一對凸緣部之間的圓筒部。轉子安裝部，是設 置成用來可一體旋轉地安裝碟煞轉子。 一般來說，轉子安裝部，設置在輪轂殻罩的其中一端 ，通常具有較輪轂殼罩的圓筒部更大的外徑。這種一般的 自行車用碟煞輪轂的左右的一對軸承，是用來將輪轂殼罩 可自由旋轉地支承於輪轂軸，而從輪轂殼罩的兩端部外側 分別安裝。 爲了將如上述的自行車用碟煞輪轂的剛性提高，將輪 轂軸的直徑加大的方式是有效的。可是，如果輪轂軸的直 -5- 201219239 徑變大的話，因應地也需要加大輪轂殼罩的外徑。在該情 況，在如上述的碟煞輪轂，伴隨著輪轂殼罩的大直徑化’ 轉子安裝部的外徑也會變大，而安裝於轉子安裝部的轉子 的內徑也會有變大的需要。 轉子安裝部的外徑不是一定的話，則會讓安裝的轉子 的互換性喪失。 因此，以往提出有一種自行車用碟煞輪轂（例如專利 文獻3)，將轉子安裝部的外徑作成一定’將輪轂軸的直 徑加大，伴隨著，在加大了輪轂殼罩的外徑的自行車用碟 煞輪轂，具有較輪轂殼罩的圓筒部分更小直徑的轉子安裝 部。 專利文獻3的自行車用輪轂’爲了具有互換性’結果 爲了達成小直徑的轉子安裝部，將左右的一對軸承作成可 從輪轂殻罩的轉子安裝部相反側的端部安裝。專利文獻3 的自行車碟煞輪轂，爲了將一對軸承從輪轂殼罩的單側安 裝，而除了專利文獻1及2的碟煞輪轂之外’安裝有：配置 在一對軸承之間用來將一對軸承定位的隔墊、以及用來將 軸承安裝側的軸承的外輪予以定位的鎖定螺母。 〔先前技術文獻〕 〔專利文獻〕 〔專利文獻1〕 曰本特開2004-142739號公報 〔專利文獻2〕 日本特開2004-224337號公報 201219239 〔專利文獻3〕 日本特開2007-297031號公報 【發明內容】 〔發明欲解決的課題〕 在上述先前構造，即使將輪轂軸大直徑化也能抑制煞 車安裝部的大直徑化，爲了維持煞車的互換性，而能防止 內徑的大型化。可是，由於將左右的一對軸承從輪轂殼罩 的單側安裝，所以需要隔墊與鎖定螺母，會導致碟煞輪轂 的零件增加。而由於將左右的一對軸承從單側安裝，所以 軸承的安裝作業變得很繁雜。因此，可能因爲零件增加及 軸承安裝作業的複雜化導致製作成本增加。 本發明的課題，是在可安裝煞車裝置的自行車用輪轂 ，不會使製造成本上升，且能抑制煞車安裝部的大直徑化 〔用以解決課題的手段〕 第1發明的自行車用輪轂’可安裝煞車裝置。自行車 用輪轂，具備有：輪轂軸、輪轂殼罩、第一軸承、及煞車 安裝部。輪轂殻罩，相對於輪轂軸可自由旋轉地安裝在輪 轂軸的外周側。第一軸承，配置在輪轂殼罩的一端部的內 周面與輪轂軸的外周面之間，具有與其一端部的內周面直 接連結的外輪’將輪轂殼罩的一端部支承於輪轂軸。煞車 安裝部，與第一軸承的外輪形成爲一體’可安裝煞車裝置 201219239 在該自行車用輪轂，在第—軸承的外輪一體地形成有 煞車安裝部。藉此，能夠抑制煞車安裝部的大直徑化。外 輪’是與輪轂殼罩的一端部的內周面直接連結。藉此，則 可從其中一端側安裝第一軸承，能抑制零件的增加，並且 能將軸承安裝作業簡化，而能抑制製造成本的上升。 第2發明的自行車用輪轂，在第1發明的自行車用輪轂 ’外輪’藉由鋸齒結合方式與輪轂殼罩的內周面直接連結 。在該情況，外輪與輪轂殼罩可一體旋轉，且不會相對旋 轉。 第3發明的自行車用輪轂，在第1發明的自行車用輪轂 ’外輪，藉由螺紋結合方式與輪轂殼罩的內周面直接連結 。在該情況，將螺紋的方向作成當制動時螺紋旋緊的方向 (例如從自行車的行進方向後方觀察，第一端部在左側時 ，爲右旋螺紋），藉此，則制動時螺紋不會鬆開，能以簡 單的構造將外輪安裝在輪轂殼罩。 第4發明的自行車用輪轂，在第1〜3發明其中之一的 自行車用輪轂，煞車安裝部，設置有煞車安裝用鋸齒。在 該情況，藉由鋸齒將煞車裝置安裝在煞車安裝部，所以煞 車裝置與煞車安裝部可一體旋轉，且不會相對旋轉。 第5發明的自行車用輪轂，在第1〜3發明其中之一的 自行車用輪轂，在煞車安裝部，設置有煞車安裝用螺紋。 在該情況，將螺紋的方向作成當制動時螺紋旋緊的方向（ 例如從自行車的行進方向後方觀察’第一端部在左側時， -8- 201219239 爲右旋螺紋）’藉此，則制動時螺紋不會鬆開，能以簡單 的構造將煞車裝置安裝在煞車安裝部。 第0發明的自行車用輪轂，在第1〜5發明其中之一的 自行車用輪轂，在煞車安裝部，可安裝碟煞裝置的轉子。 在該情況’即使輪轂軸大直徑化，也能讓碟煞裝置的轉子 的安裝部分不會大直徑化地進行安裝。 第7發明的自行車用輪轂，在第〗〜6發明其中之一的 自行車用輪轂’外輪，在較煞車安裝部更小直徑的位置， 可一體旋轉地連結在其中一端的內周面。在該情況，由於 外輪是在較煞車安裝部更小直徑的位置連結於輪轂殼罩的 內周面’所以藉由制動扭矩作用的力變大，能將連結部位 的厚度及連結長度增加。 第8發明的自行車用輪轂，在第1〜6發明其中之一的 自行車用輪轂，外輪，在與煞車安裝部同直徑的位置，可 一體旋轉地連結於一端部的內周面。在該情況，煞車安裝 部的安裝位置、與外輪朝輪轂殼罩的內周面的安裝位置爲 同直徑，所以藉由制動扭矩作用的力不會很大，容易進行 煞車安裝部及外輪的製作。 〔發明效果〕 藉由本發明，由於將煞車安裝部一體形成於外輪，所 以可以抑制煞車安裝部的大直徑化。而可將第一軸承從其 中一端側安裝，能抑制零件的增加，並且可將軸承安裝作 業簡化，能夠減少製造成本。 -9 - 201219239 【實施方式】 <第一實施方式> (構造） 本發明的一種實施方式的前輪轂1，如第1圖所不，安 裝在：於自行車的懸吊叉架98的下端處設置的一對軸安裝 部98a、98b。前輪轂1，具備有：輪轂軸10、配置在輪轂 軸1〇的外周側的輪轂殻罩11、用來安裝碟煞裝置的轉子 108 a的轉子安裝部30 (煞車安裝部的一個例子）、以及配 置在輪轂軸10與輪轂殼罩11之間的第一軸承12及第二軸承 13 » 〔輪穀軸1 0〕 輪轂軸10，是具有中心孔10a的大致筒狀的構件，藉 由將與貫穿中心孔l〇a配置的安裝螺栓15螺合的螺母16旋 緊，而不能旋轉地被安裝在懸吊叉架98的左右的一對軸安 裝部98a、98b之間。安裝螺栓15及螺母16，是懸吊叉架98 的附屬零件。 輪轂軸10，如第2圖所示，具有：第一軸端部21與第 二軸端部22。在輪轂軸10的外周面，設置有：位於輪轂軸 10的第一軸端部21側的第一內輪安裝部18、以及位於第二 軸端部22側的第二內輪安裝部19。第一內輪安裝部18，是 用來安裝第一軸承12的後述第一內輪51及第一鎖定螺母23 的部分。第二內輪安裝部19是用來安裝第二軸承13的後述 -10- 201219239 第二內輪56及第二鎖定螺母24的部分。該第一內輪安裝部 18及第二內輪安裝部19’是以形成在輪轂軸1〇的外周面的 公螺紋部所構成。 〔輪轂殼罩11〕 如第2圖所示，輪轂殼罩Π ’相對於輪轂軸1〇繞著軸 部X可自由旋轉地安裝在輪轂軸1〇的外周側，具有：在軸 方向隔著距離配置而用來卡止頓條的一對凸緣部4〇a、40b 、設置在一對凸緣部40a、40b之間的圓筒部40c、設置在 凸緣部40a的外側構成輪轂殼罩1 1的一端的第一殼罩端部 25、以及設置在凸緣部40b的外側構成輪轂殻罩1 1的另一 端的第二殼罩端部26。 在輪轂殼罩11的內周面，設置有：位於輪轂殼罩11的 第一殼罩端部25側的第一外輪安裝部27、以及位於第二殼 罩端部26側的第二外輪安裝部28。 第一外輪安裝部27，將第一軸承12的後述的第一外輪 5 0壓入固定，將第一外輪50可一體旋轉地連結在輪轂殼罩 1 1。設置有與第一外輪安裝部27的第一殼罩端部25側鄰接 的第一外輪定位部29。第一外輪定位部29，形成爲較第一 外輪安裝部27更大直徑，位於第一殼罩端部25的直徑方向 內側的軸方向內側。第一外輪定位部29，具有：從第一殼 罩端部25側抵接於第一外輪50而將第一外輪50朝第二殼罩 端部2 6側的移動予以限制的抵接面2 9 a。 第二外輪安裝部28，是用來安裝第二軸承13的後述第 -11 - 201219239 二外輪5 5的部分，將第二外輪5 5壓入。 :承於 成支： 置分有 設部具 間的是 之側， 15 2 12 1 罩部承 殼端軸 轂罩一 輪殼第 與 一 。 10第轉 軸是旋 轂就由 輪也自 在端可 ，110 2 ^ ΐ J. 1 12承1穀 承軸罩輪 軸 一殼於 一 第轂對 第 輪相 ( 將爲 於及 、 以 ο 5 ， 輪51 外輪 1 內 第一 的第 裝的 安裝 處安 27處 7\J 00 咅 1 裝部 安裝 輪安 外輪 一 內 第一 的第 11的 罩10 殼軸 穀穀 輪輪 裝配 安側 側內 5 J 2 向 部方 端徑 罩直 殼向 1 朝 第： 的有 11具 罩’ 殼 5 。穀輪 52輪外 件從一 構，第 動 5 。 滾輪11 一 外罩 第 一 殼 的第轂 數 輪 tins •tie·' 複 於 面 承 支 體 球 1 第 的 成 構 面 曲 的 曲 彎 以 有 具 而 置 澧 SB 主 第 於 定 固 入 壓 a ο 5 澧 主 輪 外 將 來 用 及 以 輪安 外輪 的外 裝部27的筒狀的外輪固定部5 0c。在外輪主體50a的軸方向 的外側部，一體形成有轉子安裝部3 0。外輪主體50a ’藉 由第一外輪定位部29在軸方向定位。外輪固定部50c’其 直徑較外輪主體50a更小。在外輪固定部50c的外周面’於 周方向隔著間隔形成有：以細小的鋸齒構成的壓入突起 5 0d。壓入突起50d，較第一外輪安裝部27的內周面的內徑 更大直徑，壓入突起5 0d當壓入時會咬入於第一外輪安裝 部27的內周面。藉此，讓第一外輪50可與第一外輪安裝部 27—體旋轉。 第一內輪51，朝向直徑方向外側配置而具有以彎曲的 曲面構成的第一球體按壓面51a。第一內輪51的內周面， -12- 201219239 螺合於第一內輪安裝部18。第一內輪51，藉由螺合於第一 內輪安裝部18的第一鎖定螺母23而固定其轉動。 複數的第一滾動構件52，是藉由沒有圖示的護圈而於 周方向等間隔配置的例如由球體所構成的構件，配置在第 —外輪50與第一內輪51之間。 在第一內輪51的外周面與第一外輪50的內周面之間’ 設置有密封構件34。 〔第二軸承13〕 第二軸承13，在輪轂軸10與輪轂殼罩11之間設置成： 將輪轂殼罩11的另一端也就是第二殼罩端部26側的部分相 對於輪轂軸10支承爲可自由旋轉。第二軸承13，具有：於 輪轂殼罩1 1的第二外輪安裝部28處安裝的第二外輪55、於 輪轂軸10的第二內輪安裝部19處安裝的第二內輪56、以及 複數的第二滾動構件57。 第二外輪55，是從第二殻罩端部26側安裝於第二外輪 安裝部2 8。第二外輪5 5，朝向直徑方向內側配置而具有以 彎曲的曲面構成的第二球體支承面55a。第二外輪55，壓 入於第二外輪安裝部28，沒有設置壓入突起。 第二內輪56，朝向直徑方向外側配置而具有以彎曲的 曲面構成的第二球體按壓面56a。第二內輪56的內周面， 螺合於第二內輪安裝面19。第二內輪56，藉由螺合於第二 內輪安裝部19的第二鎖定螺母24固定其轉動。 複數的第二滾動構件57，是藉由沒有圖示的護圈於周 -13- 201219239 方向等間隔配置的例如由球體構成的構件，配置在第二外 輪55與第二內輪56之間。 在第二滾動構件57與第二鎖定螺母24之間且在第二內 輪56的外周面與第二鎖定螺母24的內周面之間，設置有密 封構件36。在輪轂殼罩11的第二殻罩端部26的內周面，安 裝有合成樹脂製的外殻構件38。 〔轉子安裝部30〕 轉子安裝部30，是安裝碟煞裝置108的轉子l〇8a的部 分’最好與第一軸承I2的第一外輪5〇 —體形成。也可取代 該方式，將轉子安裝部30用不同於第一外輪的構件構成， 作成一體地固定於第一外輪50的構造。轉子安裝部30，較 第一外輪50的外輪主體50a的直徑稍大。轉子安裝部30, 具有鋸齒3 0a，該鋸齒3 0a具有於周方向隔著間隔配置的複 數的突起。鋸齒30a的底部30b的外徑其大小，並不是用來 安裝專門的轉子，是用來安裝：可安裝於習知的自行車用 輪轂的市面販賣的轉子l〇8a的大小。在轉子108a的內周面 ，形成有：用來與鋸齒30a卡合的鋸齒（沒有圖示）。 轉子安裝部30與第一殻罩端部25，成爲讓轉子108 a抵 接的抵接面。在轉子安裝部3 0的端部附近的內周面，設置 有：讓用來固定轉子l〇8a的轉子鎖定構件32螺合的母螺紋 部33。轉子l〇8a，藉由被夾持在第一殻罩端部25與轉子鎖 定構件32之間，而不能旋轉地被固定於轉子安裝部30。 轉子鎖定構件32，如第2圖所示，是具有：在外周面 -14- 201219239 設置有用來與轉子安裝部30的母螺紋部33螺合的公螺紋部 32d的圓筒部32a、以及較圓筒部32a更大直徑且可按壓轉 子l〇8a的凸緣部32b。在凸緣部32b的外周面，形成有：用 來將轉子l〇8a固定用的工具予以卡止的花鍵32c。 (組裝順序） 針對如上述構造的前輪轂1的組裝順序根據第1圖及第 2圖來說明。 首先，從輪轂殼罩11的兩端安裝第一軸承12的第一外 輪50及弟一軸承13的第—外輪55。第一外輪50，從輪穀殼 罩11的第一殻罩端部25，藉由壓入方式安裝到第一軸承安 裝部27。此時，壓入直到外輪主體50a抵接於第一外輪定 位部29的抵接面29a。藉此，讓第一外輪50的外輪固定部 5〇c的壓入突起50d咬入於第一外輪安裝部27，將第一外輪 5 0堅固且可一體旋轉地直接連結到第一外輪安裝部2 7。藉 此，即使制動扭矩作用於外輪固定部50c與第一外輪安裝 部27之間，第一外輪50也不會空轉。第二外輪55，從第二 殻罩端部26藉由壓入方式安裝於第二外輪安裝部28» 當第一外輪50及第二外輪55的安裝結束時，將藉由護 圈所保持的第一滾動構件52安裝於第一球體支承面5 Ob。 而將密封構件34及密封構件36安裝於第一外輪50的內周面 及第二殼罩端部26的內周面。 當這些作業結束時，將第一內輪5 1與第一鎖定螺母2 3 安裝在輪轂軸10的第一內輪安裝部18。當第一內輪51及第 -15- 201219239 一鎖定螺母23安裝時，將輪轂軸10從第一殼罩端部25側安 裝於輪轂殻罩11。最後從第二殼罩端部26側，將第二內輪 56及第二鎖定螺母24安裝到輪轂軸的第二內輪安裝部19。 此時，調整第一內輪51及第二內輪56的螺紋旋入量，調整 球體接觸。當球體接觸作業完成時，將外殼構件38安裝於 第二殼罩端部26側，完成組裝作業。 在該組裝作業，是將轉子安裝部3 0—體形成於第一外 輪50，所以能將第一軸承12及第二軸承13從輪轂殼罩11的 兩端安裝。而並不是輪轂殼罩11，是在第一外輪5 0設置有 轉子安裝部30。藉此，則即使輪轂軸10大直徑化也能抑制 轉子安裝部30大型化。並且，由於可將第一軸承12及第二 軸承13從輪轂殼罩11的第一殼罩端部25及第二殼罩端部26 分別安裝，所以不會增加零件及讓軸承安裝作業簡化，可 讓前輪轂1的成本降低。 當在這樣組裝的前輪轂1安裝轉子l〇8a時，首先，將 轉子108a嵌合於轉子安裝部30之後，將轉子鎖定構件32安 裝在轉子安裝部30，藉由專門的安裝工具（沒有圖示）將 其旋緊。在該安裝工具，具有用來卡合於花鍵32c的凹凸 部。 <第一實施方式的變形例> 第一實施方式的前輪轂1 ’藉由壓入方式將第一外輪 50可一體旋轉地連結於輪轂殼罩1 1的第一外輪安裝部27 ° 可是，如第3圖所示’在變形例的前輪轂101 ’是藉由螺紋 -16- 201219239 結合方式’將第一軸承1 1 2的第一外輪1 5 0連結於輪穀殼罩 111的第一外輪安裝部127。其他構造與第一實施方式相同 。於是’關於組裝順序’在桌一實施方式，是藉由壓入方 式將第一外輪5〇固定於第一外輪安裝部27，而在變形例， 是藉由螺紋將第一外輪1 50固定在第一外輪安裝部丨27。只 有在該處與第一實施方式的組裝順序不同。作爲第一外輪 150的固定用的工具，例如只要使用卡合於轉子安裝部3〇 的鋸齒30a的專門工具即可。 第一外輪安裝部127’在內周面具有第—母螺紋部 127a。第一外輪15〇的外輪固定部150c，在外周面具有： 與第一母螺紋部l27a螺合的第一公螺紋部150d。第一母螺 紋部127a及第一公螺紋部150d的螺紋的方向，是右旋螺紋 。藉此，則即使碟煞裝置1 0 8制動時螺紋也不會鬆開。並 且，轉子108a，是藉由轉子鎖定構件32被朝向第一殻罩端 面按壓，所以螺紋更不容易鬆開。 <第二實施方式〉 在第4圖顯示本發明的第二實施方式的前輪轂201。 在第一實施方式的前輪轂1，在較轉子安裝部30更小 直徑的位置，將第一外輪50連結於第一外輪安裝部27。另 一方面，在第二實施方式的前輪轂201，在與轉子安裝部 3 0實質同直徑的位置將外輪250連結於第一外輪安裝部227 。於是，輪轂殼罩211的第一外輪安裝部227的內徑與轉子 安裝部30的外徑實質相同。第一外輪安裝部227與第一外 -17- 201219239 輪定位部229實質爲相同內徑。外輪固定部25〇c ’形成於 外輪主體250a的外周面’讓形成有外輪固定部250c的內側 的端面抵接於抵接面229a。 針對其他構造及組裝順序，與第一實施方式的前輪轂 1相同。 這種前輪轂201，也能達到與第一實施方式的前輪轂1 同樣的效果。外輪固定部250c的外徑是大於第一實施方式 的前輪轂1，藉由制動扭矩作用於外輪連結部分的力則較 第一實施方式的前輪轂1更小。由於轉子安裝部30與外輪 固定部25 0c實質外徑相同，所以一體形成有轉子安裝部30 的外輪250的製作變得更簡單。 <第二實施方式的變形例> 如第5圖所不，第二實施方式的變形例的前輪穀301， 其轉子安裝部330的構造與第二實施方式不同。在第一實 施方式及第二實施方式，在轉子安裝部30的外周面形成有 館齒30a，可一體旋轉地連結著轉子l〇8a。可是，在變形 例，藉由螺紋結合方式連結著轉子208 a。於是，在轉子安 裝部330的外周面，形成有公螺紋部330a。爲了將轉子 2〇8a鎖定，讓轉子鎖定螺母3 3 2螺合於轉子安裝部33〇的公 螺紋部330a。因此，在轉子安裝部330的內周面沒有形成 母螺紋部。 <特徵> -18- 201219239 (A) 前輪轂1，可安裝碟煞裝置108。前輪轂1 ’具備 有：輪轂軸10、輪轂殼罩11、第一軸承12、與轉子安裝部 30。輪轂殼罩11，相對於輪轂軸10可自由旋轉地安裝在輪 轂軸10的外周側。第一軸承12 ’具有：與配置在輪轂殼罩 11的第一殼罩端部25的內周面與輪轂軸的外周面之間的 第一殼罩端部25的內周面直接連結的第—外輪50 ’將輪轂 殼罩11的第一殼罩端部25支承於輪轂軸1〇。轉子安裝部30 ，與第一軸承12的第一外輪50形成爲一體，可安裝碟煞裝 置1 0 8的轉子1 0 8 a。 在該前輪轂1，在第一軸承12的第—外輪50 一體形成 有轉子安裝部30。藉此，可抑制轉子安裝部30的大直徑化 。第一外輪50，與輪轂殼罩11的第一殼罩端部25的內周面 直接連結。藉此，可從第一殼罩端部25側安裝第一軸承12 ’能抑制零件的增加，並且能將軸承安裝作業簡化’能抑 制成本的上升。 (B) 在前輪轂1 (或前輪轂201及前輪轂301) ’第一 外輪50 (或第一外輪250)，藉由鋸齒結合方式與輪轂殼 罩11 (或輪轂殼罩211)的內周面直接連結。在該情況’ 第一外輪50 (或第一外輪250)與輪轂殼罩11 (或輪轂殻 罩2 1 1 )可一體旋轉，且不能相對旋轉。 (C) 在前輪轂101’第一外輪15〇’藉由螺紋結合方 式與輪轂殼罩1 1 1的內周面直接連結。在該情況’藉由將 螺紋的方向作成制動時螺紋旋緊的方向（例如’從自行車 的行進方向後方觀察，第一端部在左側時’爲右旋螺紋） -19- 201219239 ，則制動時螺紋不會鬆開，能以簡單的構造將第一外輪 150安裝於輪轂殼罩ill。 (D) 在目ij輪轂1 (或前輪穀1〇1及前輪轂2〇1)，轉子 安裝部30’設置有轉子i〇8a安裝用的鋸齒3〇a。在該情況 ，由於藉由鋸齒30a將轉子108a安裝於轉子安裝部3〇，所 以碟煞裝置108與轉子安裝部30可一體旋轉，且不會相對 旋轉。 (E) 在前輪轂301 ’在轉子安裝部33〇，設置有轉子 208a安裝用的公螺紋部330a。在該情況，藉由將螺紋的方 向作成制動時螺紋旋緊的方向（例如，從自行車的行進方 向後方觀察’第一端部在左側時，爲右旋螺紋），則制動 時螺紋不會鬆開，能以簡單的構造將轉子208a安裝於轉子 安裝部3 3 0。 (F) 在前輪轂1 (或前輪轂101、前輪轂201及前輪轂 301)，在轉子安裝部30(或轉子安裝部330)，可安裝碟 煞裝置108的轉子108a (或轉子208 a )。在該情況，即使 將輪轂軸10大直徑化，也不會將碟煞裝置108的轉子的安 裝部分大直徑化而能進行安裝。 (G) 在前輪轂1 (或前輪轂101)，第一外輪50 (第 —外輪150)，在較轉子安裝部30更小直徑的位置，可一 體旋轉地連結於第一殼罩端部25的內周面。在該情況，第 —外輪50 (第一外輪150)在較轉子安裝部30更小直徑的 位置連結於輪轂殼罩11 (或輪轂殻罩111)的內周面，所 以雖然藉由制動扭矩作用的力變大，而能將輪轂殼罩Π ( -20- 201219239 或輪轂殼罩1 1 1 )的連結部位的厚度及連結長度增加。 (H)在前輪轂201 (或前輪轂301)，第一外輪250， 在與轉子安裝部30(或轉子安裝部330)同直徑的位置， 可一體旋轉地連結於其中一端的內周面。在該情況，轉子 安裝部30 (或轉子安裝部3 3 0 )的安裝位置與第一外輪250 朝輪轂殼罩211的內周面的安裝位置爲同直徑，所以藉由 制動扭矩作用的力不會很大，容易進行轉子安裝部30 (或 轉子安裝部330)及外輪的製作。 <其他實施方式> (a )在上述實施方式，雖然以前輪轂爲例子說明， 而本發明也可適用於後輪轂。 (b) 在第二實施方式的變形例，與第—實施方式的 變形例同樣地，以螺紋卡合方式將外輪與輪轂殼罩連結也 可以。在該情況，也可同樣使用公螺紋部3 3 0 a將輪轂殼罩 與外輪連結。 (c) 在上述實施方式，雖然將外輪與轉子安裝部一 體形成’而也可用不同個體一體形成。例如，也可藉由內 嵌成型或外嵌成型而一體形成。在該情況，只要加進制動 扭矩來設計成型構造即可。 (d) 在上述實施方式，作爲轉子與轉子安裝部的連 結構造’雖然揭示有鋸齒及螺紋，而本發明並不限於此。 例如’也可在複數轉子安裝部形成有：可將複數支螺栓構 件插通或螺合的孔。 -21 - 201219239 (e)在上述實施方式，雖然揭示了作爲自行車用輪 轂的可安裝碟煞的轉子108a (或208a)的前輪轂，而本發 明並不限於此。例如’具有煞車鼓安裝部（煞車安裝部的 一個例子）的自行車輪轂，該煞車鼓安裝部可安裝制動帶 煞車裝置及滾筒煞車裝置的煞車鼓，本發明也適用於該自 行車輪轂。 【圖式簡單說明】 第1圖是顯示本發明的第一實施方式的前輪轂的安裝 狀態的單側剖面圖。 第2圖是第一實施方式的前輪轂的剖面圖。 第3圖是第一實施方式的變形例的前輪轂的剖面圖。 第4圖是第二實施方式的前輪轂的剖面圖。 第5圖是第二實施方式的變形例的前輪轂的剖面圖。 【主要元件符號說明】 1:前輪轂（自行車用輪轂的一個例子） 1 〇 :輪轂軸 Π :輪轂殼罩 12 :第一軸承 13 :第二軸承 25:第一殼罩端部（一端部的一個例子） 3 〇 :轉子安裝部 3 〇a :鋸齒 -22- 201219239 50 ： 90 ： 101 ： 108 ： 108 a 112： 150 ： 1 50d 201 ： 208 a 2 11： 2 5 0 ： 301 ： 3 3 0 ： 筹一外輪 自行車 前輪穀 碟煞裝置 :轉子 第一軸承 第一外輪 :第一公螺紋部 前輪轂 :轉子 輪轂殻罩 第一外輪 前輪穀 轉子安裝部 3 3 0a :公螺紋部201219239 VI. Description of the Invention: [Technical Field] The present invention relates to a bicycle hub, and more particularly to a bicycle hub that can be mounted with a brake device. [Prior Art] As a bicycle wheel brake device, a disk brake system is known, and generally includes a caliper that is attached to a bicycle frame and coupled to a handlebar, and a disk rotor. The disc rotor is fixedly coupled to a bicycle disc hub provided at an intermediate portion of the bicycle wheel. Conventional bicycle disc hubs generally include a hub axle, a hub shell, a rotor mounting portion (an example of a brake mounting portion) that is non-rotatably attached to a frame of a bicycle, and a pair of left and right bearings (refer to Patent Documents 1 and 2). The hub shell is rotatably mounted on the outer peripheral side of the hub axle with respect to the rim hub shaft. The hub shell has a pair of flange portions and a cylindrical portion provided between the pair of flange portions. The rotor mounting portion is provided to be rotatably mounted to the disk rotor. Generally, the rotor mounting portion, disposed at one end of the hub shell, typically has a larger outer diameter than the cylindrical portion of the hub shell. The pair of left and right bearings of the conventional bicycle disc hub are used to rotatably support the hub shell to the hub axle, and are attached to the outside of both ends of the hub shell. In order to increase the rigidity of the bicycle disc hub as described above, it is effective to increase the diameter of the hub shaft. However, if the diameter of the hub shaft is increased from -5 to 201219239, the outer diameter of the hub shell needs to be increased. In this case, in the above-described disc hub, the outer diameter of the rotor housing is increased as the diameter of the hub housing is increased, and the inner diameter of the rotor attached to the rotor mounting portion is also increased. need. If the outer diameter of the rotor mounting portion is not constant, the interchangeability of the mounted rotor will be lost. Therefore, there has been proposed a bicycle disc hub (for example, Patent Document 3), in which the outer diameter of the rotor mounting portion is made constant to increase the diameter of the hub shaft, and the outer diameter of the hub shell is increased. A bicycle disc hub having a smaller diameter rotor mounting portion than a cylindrical portion of the hub shell. In order to achieve the interchangeability of the bicycle hub of Patent Document 3, in order to achieve a small-diameter rotor attachment portion, the pair of left and right bearings are attached to the end portion of the hub casing that is opposite to the rotor attachment portion. The bicycle disc hub of Patent Document 3 is mounted between a pair of bearings for mounting a pair of bearings from one side of the hub shell, in addition to the disc hubs of Patent Documents 1 and 2. A pair of bearing-positioned spacers and a lock nut for positioning the outer wheel of the bearing on the bearing mounting side. [PRIOR ART DOCUMENT] [Patent Document 1] [Patent Document 1] JP-A-2004-142739 (Patent Document 2) JP-A-2004-224337 (Patent Document 3) JP-A-2007-297031 [Problems to be Solved by the Invention] In the above-described prior art, even if the hub shaft is increased in diameter, the diameter of the brake mounting portion can be reduced, and the size of the inner diameter can be prevented from increasing in order to maintain the interchangeability of the brake. However, since the pair of left and right bearings are mounted from one side of the hub shell, a spacer and a lock nut are required, which may result in an increase in the number of parts of the disc hub. Since the pair of left and right bearings are mounted from one side, the mounting work of the bearings becomes complicated. Therefore, the manufacturing cost may increase due to the increase in parts and the complexity of the bearing installation work. An object of the present invention is to provide a bicycle hub that can be equipped with a brake device, and it is possible to prevent a large increase in the diameter of the brake mounting portion without increasing the manufacturing cost. [Mechanism for Solving the Problem] The bicycle hub of the first invention can be used. Install the brake device. The bicycle hub includes a hub axle, a hub cover, a first bearing, and a brake mounting portion. The hub shell is rotatably mounted on the outer peripheral side of the hub axle with respect to the hub axle. The first bearing is disposed between the inner circumferential surface of one end portion of the hub shell and the outer circumferential surface of the hub shaft, and has an outer wheel ‘ directly coupled to an inner circumferential surface of one end portion thereof. The one end portion of the hub shell is supported by the hub shaft. The brake mounting portion is integrally formed with the outer ring of the first bearing. The brake mounting device can be mounted. 201219239 In the bicycle hub, a brake mounting portion is integrally formed on the outer ring of the first bearing. Thereby, it is possible to suppress the increase in the diameter of the brake mounting portion. The outer wheel ' is directly coupled to the inner peripheral surface of one end portion of the hub shell. By this, the first bearing can be attached from one end side, the increase in the number of parts can be suppressed, the bearing mounting work can be simplified, and the increase in manufacturing cost can be suppressed. In the bicycle hub according to the second aspect of the invention, the bicycle hub 'outer wheel' of the first invention is directly coupled to the inner peripheral surface of the hub shell by a zigzag coupling method. In this case, the outer wheel and the hub shell can be rotated integrally without relative rotation. In the bicycle hub according to the third aspect of the invention, the outer wheel of the bicycle hub of the first invention is directly coupled to the inner circumferential surface of the hub shell by screwing. In this case, the direction of the thread is made to be a direction in which the thread is tightened when braking (for example, when the first end is on the left side, it is a right-handed thread), whereby the thread is not braked. Loosen, the outer wheel can be mounted to the hub shell in a simple configuration. In the bicycle hub according to the first to third aspects of the present invention, the bicycle mounting portion is provided with a sawing tooth for mounting the brake. In this case, since the brake device is attached to the brake mounting portion by the serrations, the brake device and the brake mounting portion can be integrally rotated without relative rotation. In the bicycle hub according to the fifth aspect of the invention, in the bicycle hub according to any one of the first to third aspects, the brake mounting screw is provided in the brake mounting portion. In this case, the direction of the thread is made to be the direction in which the thread is tightened when braking (for example, when the first end is on the left side from the direction of travel of the bicycle, -8-201219239 is a right-handed thread). When the thread is not loosened, the brake device can be mounted on the brake mounting portion in a simple configuration. In the bicycle hub according to the first aspect of the invention, in the bicycle hub according to any one of the first to fifth aspects, the rotor of the disc device can be attached to the brake mounting portion. In this case, even if the hub shaft is increased in diameter, the mounting portion of the rotor of the disk device can be mounted without being increased in diameter. In the bicycle hub according to the seventh aspect of the invention, the outer wheel of the bicycle hub of the invention of the sixth to sixth invention is integrally rotatablely coupled to the inner circumferential surface of one end thereof at a position smaller than the diameter of the brake mounting portion. In this case, since the outer ring is coupled to the inner peripheral surface of the hub shell at a position smaller than the diameter of the brake mounting portion, the force acting by the braking torque is increased, and the thickness and the connecting length of the connecting portion can be increased. In the bicycle hub according to the first to sixth aspects of the invention, the bicycle wheel hub is integrally coupled to the inner peripheral surface of the one end portion at a position of the same diameter as the brake mounting portion. In this case, since the mounting position of the brake mounting portion and the mounting position of the outer ring to the inner circumferential surface of the hub shell are the same diameter, the force acting by the braking torque is not large, and the brake mounting portion and the outer wheel are easily manufactured. . [Effect of the Invention] According to the present invention, since the brake mounting portion is integrally formed on the outer ring, it is possible to suppress the increase in the diameter of the brake mounting portion. The first bearing can be mounted from one end side thereof to suppress an increase in parts, and the bearing mounting work can be simplified, and the manufacturing cost can be reduced. -9 - 201219239 [Embodiment] <First Embodiment> (Structure) The front hub 1 according to an embodiment of the present invention is attached to the lower end of the suspension fork 98 of the bicycle as shown in Fig. 1 A pair of shaft mounting portions 98a, 98b provided at the same. The front hub 1 includes a hub axle 10, a hub shell cover 11 disposed on the outer peripheral side of the hub axle 1〇, and a rotor mounting portion 30 (an example of a brake mounting portion) for mounting the rotor 108a of the disc device, And the first bearing 12 and the second bearing 13 (the valley shaft 10) disposed between the hub axle 10 and the hub shell 11 are the substantially cylindrical members having the center hole 10a, by The nut 16 screwed to the mounting bolt 15 disposed through the center hole 10a is screwed, and is rotatably attached between the pair of left and right shaft mounting portions 98a, 98b of the suspension fork 98. The mounting bolt 15 and the nut 16 are accessory parts of the suspension fork 98. The hub axle 10 has a first shaft end portion 21 and a second shaft end portion 22 as shown in Fig. 2 . The outer peripheral surface of the hub axle 10 is provided with a first inner wheel mounting portion 18 on the first shaft end portion 21 side of the hub axle 10 and a second inner wheel mounting portion 19 on the second shaft end portion 22 side. The first inner wheel mounting portion 18 is a portion for attaching the first inner ring 51 and the first lock nut 23, which will be described later, of the first bearing 12. The second inner wheel mounting portion 19 is a portion for attaching the second inner ring 56 and the second lock nut 24, which will be described later, of the second bearing 13. The first inner wheel mounting portion 18 and the second inner wheel mounting portion 19' are formed by a male screw portion formed on the outer peripheral surface of the hub axle 1A. [Wheel Shell Cover 11] As shown in Fig. 2, the hub shell cover Π is rotatably attached to the outer peripheral side of the hub axle 1〇 with respect to the hub shaft 1 around the shaft portion X, and has a cross-shaft direction The pair of flange portions 4a and 40b disposed to be used to lock the bar, the cylindrical portion 40c provided between the pair of flange portions 40a and 40b, and the outer side of the flange portion 40a constitute the hub shell A first cover end portion 25 at one end of the cover 1 1 and a second cover end portion 26 disposed on the outer side of the flange portion 40b constitute the other end of the hub cover 1 1 . The inner peripheral surface of the hub shell 11 is provided with a first outer wheel mounting portion 27 on the side of the first shroud end portion 25 of the hub shell 11 and a second outer wheel mounting on the side of the second shroud end portion 26 Department 28. The first outer ring mounting portion 27 presses and fixes the first outer ring 50, which will be described later, of the first bearing 12, and integrally connects the first outer ring 50 to the hub shell 1 1 . A first outer wheel positioning portion 29 that is adjacent to the first cover end portion 25 side of the first outer wheel mounting portion 27 is provided. The first outer ring positioning portion 29 is formed to have a larger diameter than the first outer wheel mounting portion 27, and is located on the inner side in the axial direction inner side of the first casing end portion 25 in the diameter direction. The first outer ring positioning portion 29 has an abutting surface 2 that abuts against the first outer ring 50 from the first cover end portion 25 side and restricts the movement of the first outer ring 50 toward the second cover end portion 26 side. 9 a. The second outer-wheel mounting portion 28 is a portion for attaching the second outer bearing 15 of the second bearing 13 to the -11 - 201219239, and presses the second outer ring 55. : Under the support: the side with the set between the parts is the side, 15 2 12 1 cover part of the shell end shaft hub cover a wheel shell first and one. 10 The first rotating shaft is the hub and the wheel is also free. 110 2 ^ ΐ J. 1 12 bearing 1 valley bearing shaft axle is shelled in a hub to the first phase (will be, and ο 5 , wheel 51 The first installation position of the outer wheel 1 is 27, 7\J 00 咅1, the installation part of the wheel, the outer wheel, the first 11th cover 10, the shell axis, the valley wheel, the assembly side, 5 J 2 to the square end of the straight cover to the 1st toward the first: there are 11 hood 'shell 5. The copeland 52 round outer part from a structure, the first move 5. The roller 11 a cover the first shell of the first wheel of the wheel tins •tie·' The curved part of the first part of the surface of the support ball 1 is set to have the 澧 SB main set to the fixed pressure a ο 5 澧 the main wheel for future use and the wheel outer wheel The cylindrical outer wheel fixing portion 50c of the exterior portion 27 is integrally formed with the rotor attachment portion 30 at the outer side portion of the outer ring main body 50a in the axial direction. The outer wheel main body 50a' is positioned in the axial direction by the first outer wheel positioning portion 29. The outer wheel fixing portion 50c' has a smaller diameter than the outer wheel main body 50a. On the outer circumference of the outer wheel fixing portion 50c The press-fitting projection 50d formed of fine serrations is formed at intervals in the circumferential direction. The press-fitting projection 50d has a larger diameter than the inner diameter of the inner peripheral surface of the first outer race attaching portion 27, and the projection 5d is pressed. When pressed in, it will bite into the inner peripheral surface of the first outer ring mounting portion 27. Thereby, the first outer ring 50 can be rotated integrally with the first outer wheel mounting portion 27. The first inner ring 51 is disposed radially outward. The first inner ball pressing surface 51a is formed by a curved curved surface. The inner circumferential surface of the first inner ring 51 is -12-201219239 screwed to the first inner wheel mounting portion 18. The first inner wheel 51 is screwed. The first lock nut 23 of the first inner wheel mounting portion 18 is fixed to rotate. The plurality of first rolling members 52 are, for example, formed of spheres, which are disposed at equal intervals in the circumferential direction by a retainer (not shown). The member is disposed between the first outer wheel 50 and the first inner ring 51. A sealing member 34 is provided between the outer peripheral surface of the first inner ring 51 and the inner peripheral surface of the first outer ring 50. [Second bearing 13] The second bearing 13 is disposed between the hub axle 10 and the hub shell 11 to: the hub shell 11 A portion at one end, that is, on the side of the second cover end portion 26, is rotatably supported with respect to the hub axle 10. The second bearing 13 has a second outer wheel mounted at the second outer wheel mounting portion 28 of the hub shell 11 55. A second inner ring 56 attached to the second inner wheel mounting portion 19 of the hub axle 10, and a plurality of second rolling members 57. The second outer wheel 55 is attached to the second casing end 26 side. Two outer wheel mounting portions 2 8. The second outer ring 55 is disposed toward the inner side in the radial direction and has a second spherical body supporting surface 55a formed of a curved curved surface. The second outer ring 55 is press-fitted to the second outer wheel mounting portion 28, and no press-fitting projection is provided. The second inner ring 56 is disposed outward in the radial direction and has a second spherical pressing surface 56a formed of a curved curved surface. The inner circumferential surface of the second inner ring 56 is screwed to the second inner wheel mounting surface 19. The second inner ring 56 is fixed in rotation by a second lock nut 24 screwed to the second inner wheel mounting portion 19. The plurality of second rolling members 57 are disposed between the second outer ring 55 and the second inner ring 56 by a member made of, for example, a spherical body disposed at equal intervals in the circumferential direction of the circumference -13 - 201219239. A sealing member 36 is provided between the second rolling member 57 and the second lock nut 24 and between the outer circumferential surface of the second inner ring 56 and the inner circumferential surface of the second lock nut 24. On the inner circumferential surface of the second cover end portion 26 of the hub shell 11, a synthetic resin outer casing member 38 is attached. [Rotor mounting portion 30] The rotor mounting portion 30 is a portion of the rotor 8a to which the disk device 108 is attached. It is preferably formed integrally with the first outer ring 5 of the first bearing I2. Alternatively, the rotor mounting portion 30 may be configured by a member different from the first outer ring, and may be integrally fixed to the first outer ring 50. The rotor attachment portion 30 is slightly larger than the diameter of the outer ring main body 50a of the first outer ring 50. The rotor attachment portion 30 has serrations 30a having a plurality of projections arranged at intervals in the circumferential direction. The outer diameter of the bottom portion 30b of the serration 30a is not the size of a special rotor for mounting: the size of the commercially available rotor l8a that can be mounted on a conventional bicycle hub. On the inner circumferential surface of the rotor 108a, serrations (not shown) for engaging with the serrations 30a are formed. The rotor attachment portion 30 and the first cover end portion 25 serve as abutting surfaces for abutting the rotor 108a. A female screw portion 33 for screwing the rotor lock member 32 for fixing the rotor 10a is provided on the inner peripheral surface of the end portion of the rotor attachment portion 30. The rotor 10a is fixed to the rotor mounting portion 30 so as to be non-rotatably held between the first cover end portion 25 and the rotor locking member 32. As shown in Fig. 2, the rotor lock member 32 has a cylindrical portion 32a provided with a male screw portion 32d for screwing with the female screw portion 33 of the rotor attachment portion 30 on the outer peripheral surface-14 - 201219239, and The cylindrical portion 32a has a larger diameter and can press the flange portion 32b of the rotor 10a. On the outer peripheral surface of the flange portion 32b, a spline 32c for locking the tool for fixing the rotor 10a is formed. (Assembly sequence) The assembly procedure of the front hub 1 having the above configuration will be described with reference to Figs. 1 and 2 . First, the first outer ring 50 of the first bearing 12 and the first outer wheel 55 of the first bearing 13 are attached from both ends of the hub shell 11. The first outer ring 50 is attached to the first bearing mounting portion 27 from the first cover end portion 25 of the wheel house cover 11 by press fitting. At this time, the outer ring main body 50a is pressed in contact with the abutting surface 29a of the first outer ring positioning portion 29. Thereby, the press-fitting projection 50d of the outer ring fixing portion 5〇c of the first outer ring 50 is bitten into the first outer wheel mounting portion 27, and the first outer ring 50 is firmly and integrally coupled to the first outer wheel mounting portion. 2 7. Thereby, even if the braking torque acts between the outer ring fixing portion 50c and the first outer wheel mounting portion 27, the first outer ring 50 does not idle. The second outer ring 55 is attached to the second outer wheel mounting portion 28 from the second cover end portion 26 by press fitting. When the first outer wheel 50 and the second outer wheel 55 are installed, the retainer is held by the retainer. The first rolling member 52 is attached to the first ball supporting surface 5 Ob. The seal member 34 and the seal member 36 are attached to the inner peripheral surface of the first outer ring 50 and the inner peripheral surface of the second cover end portion 26. When these operations are completed, the first inner ring 51 and the first lock nut 2 3 are mounted to the first inner wheel mounting portion 18 of the hub axle 10. When the first inner ring 51 and the -15-201219239 one lock nut 23 are mounted, the hub axle 10 is mounted to the hub shell 11 from the side of the first cover end portion 25. Finally, from the second cover end portion 26 side, the second inner ring 56 and the second lock nut 24 are attached to the second inner wheel mounting portion 19 of the hub axle. At this time, the screwing amount of the first inner ring 51 and the second inner wheel 56 is adjusted to adjust the ball contact. When the ball contact operation is completed, the outer casing member 38 is attached to the second casing end portion 26 side to complete the assembly work. In this assembly work, since the rotor mounting portion 30 is formed in the first outer ring 50, the first bearing 12 and the second bearing 13 can be attached from both ends of the hub shell 11. Rather than the hub cover 11, the first outer wheel 50 is provided with a rotor mounting portion 30. Thereby, even if the hub axle 10 is increased in diameter, the size of the rotor mounting portion 30 can be suppressed from increasing. Further, since the first bearing 12 and the second bearing 13 can be respectively attached from the first cover end portion 25 and the second cover end portion 26 of the hub shell cover 11, the parts are not added and the bearing mounting work is simplified. The cost of the front hub 1 can be reduced. When the rotor 8a is mounted on the front hub 1 thus assembled, first, after the rotor 108a is fitted to the rotor mounting portion 30, the rotor locking member 32 is attached to the rotor mounting portion 30 by a special mounting tool (not shown) Show) tighten it. In the mounting tool, there are concave and convex portions for engaging with the splines 32c. <Modification of First Embodiment> The front wheel hub 1' of the first embodiment integrally connects the first outer ring 50 to the first outer wheel mounting portion 27 of the hub shell 1 1 by press-fitting means. As shown in Fig. 3, the front wheel hub 101' of the modified example is coupled to the wheel house cover 111 by the first outer ring 150 of the first bearing 1 1 2 by the screw--16-201219239 coupling method. An outer wheel mounting portion 127. Other configurations are the same as those of the first embodiment. Thus, in the embodiment of the table, the first outer wheel 5 is fixed to the first outer wheel mounting portion 27 by press-fitting, and in the modified example, the first outer wheel 150 is fixed by screws. The first outer wheel mounting portion 丨27. Only the assembly order of the first embodiment is different here. As the fixing tool of the first outer ring 150, for example, a special tool that is engaged with the serrations 30a of the rotor mounting portion 3A may be used. The first outer ring mounting portion 127' has a first female thread portion 127a on the inner circumferential surface. The outer ring fixing portion 150c of the first outer ring 15A has a first male screw portion 150d that is screwed to the first female screw portion l27a on the outer peripheral surface. The direction of the threads of the first female thread portion 127a and the first male thread portion 150d is a right-handed thread. Thereby, the thread will not be loosened even if the disc device 1 0 8 is braked. Further, the rotor 108a is pressed toward the first cover end by the rotor lock member 32, so that the thread is less likely to be loosened. <Second Embodiment> A front wheel hub 201 according to a second embodiment of the present invention is shown in Fig. 4 . In the front hub 1 of the first embodiment, the first outer ring 50 is coupled to the first outer wheel mounting portion 27 at a position smaller than the diameter of the rotor attachment portion 30. On the other hand, in the front hub 201 of the second embodiment, the outer ring 250 is coupled to the first outer wheel mounting portion 227 at a position substantially the same diameter as the rotor mounting portion 30. Thus, the inner diameter of the first outer wheel mounting portion 227 of the hub shell 211 is substantially the same as the outer diameter of the rotor mounting portion 30. The first outer wheel mounting portion 227 is substantially the same inner diameter as the first outer -17-201219239 wheel positioning portion 229. The outer ring fixing portion 25〇c' is formed on the outer peripheral surface of the outer ring main body 250a. The inner end surface on which the outer ring fixing portion 250c is formed abuts against the abutting surface 229a. The other structure and assembly sequence are the same as those of the front hub 1 of the first embodiment. This front hub 201 can also achieve the same effect as the front hub 1 of the first embodiment. The outer diameter of the outer wheel fixing portion 250c is larger than that of the front hub 1 of the first embodiment, and the force acting on the outer wheel coupling portion by the braking torque is smaller than that of the front hub 1 of the first embodiment. Since the rotor mounting portion 30 and the outer ring fixing portion 25 0c have substantially the same outer diameter, the production of the outer ring 250 in which the rotor mounting portion 30 is integrally formed becomes simpler. <Modification of Second Embodiment> As shown in Fig. 5, the front wheel valley 301 of the modification of the second embodiment differs from the second embodiment in the structure of the rotor attachment portion 330. In the first embodiment and the second embodiment, the temple teeth 30a are formed on the outer circumferential surface of the rotor attachment portion 30, and the rotor 10a is integrally rotatably coupled. However, in the modified example, the rotor 208a is coupled by screwing. Then, a male screw portion 330a is formed on the outer peripheral surface of the rotor mounting portion 330. In order to lock the rotor 2〇8a, the rotor lock nut 3 3 2 is screwed to the male screw portion 330a of the rotor mounting portion 33A. Therefore, the female screw portion is not formed on the inner circumferential surface of the rotor attachment portion 330. <Features> -18- 201219239 (A) The front hub 1 can be mounted with the disc device 108. The front hub 1' is provided with a hub axle 10, a hub shell 11, a first bearing 12, and a rotor mounting portion 30. The hub shell 11 is rotatably attached to the outer peripheral side of the hub axle 10 with respect to the hub axle 10. The first bearing 12' has a first direct connection with the inner peripheral surface of the first cover end portion 25 disposed between the inner peripheral surface of the first cover end portion 25 of the hub shell 11 and the outer peripheral surface of the hub shaft The outer wheel 50' supports the first shroud end 25 of the hub shell 11 to the hub axle 1〇. The rotor mounting portion 30 is formed integrally with the first outer ring 50 of the first bearing 12, and the rotor 1 0 8 a of the disk device 1 0 8 can be mounted. In the front hub 1, a rotor mounting portion 30 is integrally formed on the first outer ring 50 of the first bearing 12. Thereby, the diameter of the rotor mounting portion 30 can be suppressed from increasing. The first outer ring 50 is directly coupled to the inner peripheral surface of the first cover end portion 25 of the hub shell 11. Thereby, the first bearing 12' can be attached from the side of the first cover end portion 25', the increase in the number of parts can be suppressed, and the bearing mounting work can be simplified, and the increase in cost can be suppressed. (B) In the front hub 1 (or the front hub 201 and the front hub 301) 'the first outer wheel 50 (or the first outer wheel 250), by means of a saw tooth combination with the inner circumference of the hub shell 11 (or the hub shell 211) Directly linked. In this case, the first outer wheel 50 (or the first outer wheel 250) and the hub shell 11 (or the hub shell 2 1 1 ) are integrally rotatable and are not rotatable relative to each other. (C) The first outer ring 15'' of the front hub 101' is directly coupled to the inner peripheral surface of the hub shell 1 1 1 by screwing. In this case, 'the direction of the thread is made to be the direction in which the thread is tightened when braking (for example, 'from the rear of the bicycle, the first end is on the left side' is a right-hand thread) -19- 201219239 The thread is not loosened, and the first outer wheel 150 can be mounted to the hub shell ill in a simple configuration. (D) In the eye id hub 1 (or the front wheel valley 1〇1 and the front hub 2〇1), the rotor attachment portion 30' is provided with a serration 3〇a for mounting the rotor i〇8a. In this case, since the rotor 108a is attached to the rotor mounting portion 3 by the serrations 30a, the disc device 108 and the rotor mounting portion 30 can be integrally rotated without relative rotation. (E) The male hub portion 330a for mounting the rotor 208a is provided in the rotor mounting portion 33 of the front hub 301'. In this case, the thread is not loosened during braking by making the direction of the thread the direction in which the thread is tightened during braking (for example, when the first end is on the left side from the direction of travel of the bicycle, it is a right-handed thread). The rotor 208a can be attached to the rotor mounting portion 3300 in a simple configuration. (F) In the front hub 1 (or the front hub 101, the front hub 201, and the front hub 301), the rotor 108a (or the rotor 208a) of the disk device 108 can be mounted on the rotor mounting portion 30 (or the rotor mounting portion 330). . In this case, even if the hub axle 10 is made large in diameter, the mounting portion of the rotor of the disk unit 108 is not increased in diameter and can be mounted. (G) In the front hub 1 (or the front hub 101), the first outer ring 50 (the first outer wheel 150) is integrally rotatably coupled to the first cover end portion 25 at a position smaller than the diameter of the rotor mounting portion 30. Inner circumference. In this case, the first outer wheel 50 (the first outer wheel 150) is coupled to the inner peripheral surface of the hub shell 11 (or the hub shell 111) at a position smaller than the diameter of the rotor mounting portion 30, so that the brake torque acts. The force is increased, and the thickness and the joint length of the joint portion of the hub shell cover ( -20- 201219239 or the hub shell cover 1 1 1 ) can be increased. (H) In the front hub 201 (or the front hub 301), the first outer ring 250 is integrally rotatably coupled to the inner peripheral surface of one end thereof at the same diameter as the rotor attachment portion 30 (or the rotor attachment portion 330). In this case, the mounting position of the rotor mounting portion 30 (or the rotor mounting portion 303) is the same as the mounting position of the first outer ring 250 toward the inner peripheral surface of the hub shell 211, so the force acting by the braking torque is not It is large, and it is easy to manufacture the rotor mounting portion 30 (or the rotor mounting portion 330) and the outer wheel. <Other Embodiments> (a) In the above embodiment, the conventional hub is described as an example, and the present invention is also applicable to the rear hub. (b) In the modification of the second embodiment, the outer ring and the hub shell may be coupled by screw engagement as in the modification of the first embodiment. In this case as well, the male hub portion 3 3 0 a can be used to connect the hub shell cover to the outer wheel. (c) In the above embodiment, the outer wheel and the rotor mounting portion may be integrally formed by a different body. For example, it may be integrally formed by insert molding or overmolding. In this case, it is only necessary to add the braking torque to design the molding structure. (d) In the above embodiment, the connection structure between the rotor and the rotor attachment portion is described as having serrations and threads, but the present invention is not limited thereto. For example, a hole in which a plurality of bolt members can be inserted or screwed can be formed in the plurality of rotor attachment portions. -21 - 201219239 (e) In the above embodiment, the front hub of the rotor 108a (or 208a) which can be mounted as a bicycle hub is disclosed, but the present invention is not limited thereto. For example, a bicycle hub having a brake drum mounting portion (an example of a brake mounting portion) in which a brake belt brake device and a brake drum of a drum brake device can be mounted, and the present invention is also applicable to the bicycle hub. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a side cross-sectional view showing a state in which a front hub of a first embodiment of the present invention is mounted. Fig. 2 is a cross-sectional view showing the front hub of the first embodiment. Fig. 3 is a cross-sectional view showing a front hub of a modification of the first embodiment. Fig. 4 is a cross-sectional view showing the front hub of the second embodiment. Fig. 5 is a cross-sectional view showing a front hub of a modification of the second embodiment. [Description of main component symbols] 1: Front hub (an example of a bicycle hub) 1 〇: Hub axle 轮: Hub shell 12: First bearing 13: Second bearing 25: First casing end (one end An example) 3 〇: rotor mounting part 3 〇a : sawtooth-22- 201219239 50 : 90 : 101 : 108 : 108 a 112: 150 : 1 50d 201 : 208 a 2 11: 2 5 0 : 301 : 3 3 0 : Raising an outer wheel bicycle front wheel guillotine device: rotor first bearing first outer wheel: first male thread part front hub: rotor hub shell first outer wheel front wheel valley rotor mounting part 3 3 0a: male thread