1305762 (1) 九、發明說明 【發明所屬之技術領域】 本發明槪括而言相關於自行車底部托架總成 地說，本發明相關於具有位在自行車車架的圓柱 或底部托架管內的軸承的自行車底部托架總成。 【先前技術】 騎自行車正成爲日益流行的娛樂形式以及運 另外，騎自行車對於業餘愛好者及專業人士而言 非常流行的競賽運動。不論自行車是用於娛樂， 競賽，自行車工業都在不斷地改進自行車的各種 件。已曾被廣泛地重新設計的一組件便是通常被 托架的自行車底部托架。 日本專利公開第2004-249770號揭示一種安 車的懸架部上的傳統底部托架。此傳統底部托架 別具有第一及第二軸承扣持區段的第一及第二軸 件或殼體。第一及第二軸承支撐殻體被分開地旋 的兩端部部份內。此傳統的曲柄軸總成進一步包 第一及第二軸承支撐殼體上的第一及第二軸承。 可旋轉地支撐在第一及第二軸承二者上，並且右 被不可旋轉地安裝在曲柄軸的二軸向端部部份上 在此種傳統底部托架中，右曲柄被固定在曲 軸向端部部份上。第一及第二軸承的內環件被右 的內邊緣部份壓且被設置成爲使得右及左曲柄可 。更明確 形懸架部 輸工具。 均已成爲 運輸，或 不同的組 稱爲底部 裝在自行 配備有分 承支撐構 入懸架部 含儲存在 曲柄軸被 及左曲柄 〇 柄軸的右 及左曲柄 對第一及 -5- (2) (2)1305762 第二軸承的內環件施加壓力。左曲柄是藉著在曲柄軸的左 軸向端部部份處形成在圓周表面上的鋸齒而被不可旋轉地 安裝在曲柄軸上。另外，左曲柄是藉著螺旋在曲柄軸的左 邊緣內圓周表面上的緊固螺栓而被緊固於曲柄軸。當左曲 柄藉著緊固螺栓而緊固於曲柄軸時，右及左曲柄藉著右及 左曲柄的被放置成爲與第一及第二軸承的內環件於軸向方 向的外側表面接觸而將第一及第二軸承的內環件於軸向方 向向內壓。另外，狹縫沿著徑向方向形成在左曲柄的曲柄 軸安裝部份上。在藉著緊固螺栓緊固左曲柄之後，左曲柄 可藉著使用二安裝螺栓來使狹縫的寬度變窄而被進一步牢 靠地緊固在曲柄軸上。在以上所說明的傳統自行車底部托 架中，藉著使用緊固左曲柄的緊固螺栓來壓第一及第二軸 承的內環件，軸承游隙（bearing play)可藉著將左曲柄 緊固於曲柄軸而經由左曲柄被調整。然後，左曲柄藉著用 安裝螺栓使左曲柄的狹縫的寬度變窄而被進一步緊固在曲 柄軸上。 但是’在此類型的傳統自行車底部托架中，軸承位在 自行車車架的圓柱形懸架部或底部托架管的外部。結果， 必須使自行車車架的底部托架管的軸向長度小至足以順應 位在自行車車架的底部托架管的外部的軸承。另外，因爲 第一及第二軸承支撐殼體被螺旋至自行車車架的底部托架 管內’所以第一及第二軸承支撐殻體是由金屬材料製成且 底部托架管的端部形成有螺紋。因此，此傳統自行車底部 托架結構可能相當笨重且必須在底部托架管的端部形成螺 -6 - 13057621305762 (1) IX. INSTRUCTIONS OF THE INVENTION [Technical Field of the Invention] The present invention relates to a bicycle bottom bracket assembly. The present invention relates to having a cylindrical or bottom bracket tube located in a bicycle frame. The bearing of the bicycle bottom bracket assembly. [Prior Art] Cycling is becoming an increasingly popular form of entertainment and transportation. In addition, cycling is a very popular competitive sport for amateurs and professionals. Whether the bicycle is used for recreation, competition, the bicycle industry is constantly improving the variety of bicycles. One component that has been extensively redesigned is the bicycle bottom bracket that is typically bracketed. Japanese Patent Publication No. 2004-249770 discloses a conventional bottom bracket on a suspension portion of an automobile. The conventional bottom bracket has first and second shaft members or housings of the first and second bearing retaining sections. The first and second bearing support housings are separately rotated in both end portions. The conventional crank axle assembly further includes first and second bearings on the first and second bearing support housings. Rotatablely supported on both the first and second bearings, and the right is non-rotatably mounted on the biaxial end portion of the crankshaft. In such a conventional bottom bracket, the right crank is fixed to the crankshaft On the end part. The inner ring members of the first and second bearings are pressed by the right inner edge portion and are disposed such that the right and left cranks are available. More clearly shaped suspension parts. Both have become transported, or the different groups are called bottom mounted on the self-equipped with the support bearing into the suspension section containing the right and left cranks stored on the crankshaft and the left crank shank shaft to the first and -5- (2 (2) 1305762 The inner ring of the second bearing applies pressure. The left crank is non-rotatably mounted on the crankshaft by serrations formed on the circumferential surface at the left axial end portion of the crankshaft. Further, the left crank is fastened to the crankshaft by a fastening bolt of a spiral on the inner circumferential surface of the left edge of the crankshaft. When the left crank is fastened to the crankshaft by the fastening bolt, the right and left cranks are placed by the right and left cranks to be in contact with the outer surface of the inner ring members of the first and second bearings in the axial direction. The inner ring members of the first and second bearings are pressed inward in the axial direction. Further, the slit is formed in the radial direction on the crank shaft mounting portion of the left crank. After the left crank is fastened by the fastening bolts, the left crank can be further securely fastened to the crankshaft by using two mounting bolts to narrow the width of the slit. In the conventional bicycle bottom bracket described above, by using the fastening bolts for fastening the left crank to press the inner ring members of the first and second bearings, the bearing play can be tightened by the left crank. Fastened to the crankshaft and adjusted via the left crank. Then, the left crank is further fastened to the crank shaft by narrowing the width of the slit of the left crank with the mounting bolt. However, in a conventional bicycle bottom bracket of this type, the bearing is located outside the cylindrical suspension portion or the bottom bracket tube of the bicycle frame. As a result, the axial length of the bottom bracket tube of the bicycle frame must be made small enough to conform to the bearings located outside the bracket tube at the bottom of the bicycle frame. In addition, since the first and second bearing support housings are screwed into the bottom bracket tube of the bicycle frame, the first and second bearing support housings are made of a metal material and the ends of the bottom bracket tubes are formed. Threaded. Therefore, the conventional bicycle bottom bracket structure may be quite bulky and must form a screw at the end of the bottom bracket tube -6 - 1305762
紋。 鑑於以上’對於熟習此項技術者而言從此揭示很明顯 ，對於創新的自行車曲柄軸軸承總成或底部托架有需求。 * 本發明針對此技術領域中的此需求以及其他需求，此對於 •熟習此項技術者而言從此揭示很明顯。 【發明內容】 φ 本發明的一目的爲提供—種自行車底部托架總成，其 具有被扣持在自行車車架的懸架部的端部內的非金屬軸承 支撐構件或殼體中的軸承。 本發明的另一目的爲提供重量相當輕的自行車底部托 架總成。 本發明的另一目的爲提供使自行車車架的懸架部的端 部不須形成有螺紋的自行車底部托架總成。 上述目的基本上可藉著提供一種自行車底部托架總成 • 而達成，其包含第一及第二軸承支撐構件（殼體），及第 一及第二軸承，使得底部托架總成形成爲且被配置成被安 裝至自行車車架的懸架部內。自行車車架的懸架部具有第 一開口端部及第二開口端部。第一及第二軸承支撐構件分 別被壓入配合至懸架部的第一及第二開口端部內。第一及 ' 第二軸承分別被扣持於第一及第二軸承支撐構件成爲使得 第一及第二軸承在第一及第二軸承的每一個的外座圈分別 接合第一及第二軸承支撐構件之下被設置在懸架部的內部 。曲柄軸藉著第一及第二軸承的內座圏而可旋轉地支撐在 -7- (4) 1305762 懸架部內，其中曲柄軸的第一軸向端部部份被設置在懸架 ' 部的第一開口端部處，且曲柄軸的第二軸向端部部份被設 置在懸架部的第二開口端部處。 - 根據本發明的一方面，底部托架總成的特徵在於軸承 殼體被壓入配合至圓柱形懸架部內成爲使得軸承被軸向定 位成爲在圓柱形懸架部的軸向端部的內側或與圓柱形懸架 部的軸向端部齊平。 φ 根據本發明的另一方面，底部托架總成的特徵在於軸 承支撐構件（殼體）是由非金屬材料（例如樹脂）製成， 且以壓入配合的方式被耦接至圓柱形懸架部內。如此，此 種結構容許圓柱形懸架部的軸向長度與以上所討論的傳統 設計的長度相比較長，且增加裝附於自行車車架的此區域 的零件的設計自由度。另外，因爲本發明的底部托架總成 包含被夾在軸承殻體與覆蓋構件之間的軸承，所以使用者 可容易地將成爲一單元的底部托架以壓入配合的方式耦接 # 至圓柱形懸架部內。較佳地，軸承殼體可由樹脂製成。此 種由樹脂製成的軸承殻體導致重量的減輕及踩踏期間噪音 的降低。 ，對於熟習此項技術者而言，本發明的這些及其他目的 ’特徵’方面，及有利點從以下連同圖式揭示本發明的較 « 佳實施例的詳細敘述會顯明。 以下會參考形成此原始揭示的一部份的圖式。 【實施方式】 - 8 - (5) (5)1305762 以下參考圖式說明本發明的選定的實施例。對於胃胃 此項技術者而言從此揭不很明顯，以下的本發明的實施例 的敘述只是被提供來舉例說明，而非要限制由附隨的申請 專利範圍及其等效物所界定的本發明。 首先參考圖1’圖中顯示配備本發明的第一實施例的 自行車10。在此例中，自行車ίο爲具有鑽石形車架12 的公路自行車’其中車架12具有三角形前三角架及配置 在前三角架後方的三角形後三角架。車架12作用成爲自 行車本體的框架。車架12具有可樞轉地支撐在車架12的 前部上的前叉14’使得前叉14可繞從錯垂方向稍微傾斜 的軸線自由旋轉。前叉14的下方或底部被分成二叉部。 自行車10也設置有連接於前叉的沈降型（（irop-type) 車把單元16，及設置在車架12的下方部份上的驅動單元 18°驅動單元18形成爲將踩踏力轉換成爲驅動力。前車 輪20以可自由旋轉的方式被支撐在前叉14的底端部上， 而後車輪22以可自由旋轉的方式被支撐在車架12的後部 上。當然’自行車10可依需要及/或所想要的包含其他組 件。 車架12基本上是由頂管24，下管26，頭管28，座 管30’ 一對座撐32，及一對鏈撐34形成。頂管24大致 上水平配置’而下管26被配置在頂管24下方成爲使得下 管2 6朝向前方斜向向上傾斜。頭管2 8將頂管24及下管 26的前端部結合在一起。座管3〇對角線地向上延伸且將 頂管24及下管26的後端部結合在一起。 -9- (6) 1305762 自行車10也設置有座柱3 6，而鞍座3 8緊固於座柱 • 36。座柱36被固定在座管30中成爲使得座柱36的位置 可於直立向被上下調整。圓柱形或管狀懸架部40 (顯示 _ 在圖2中）形成在座管30與下管26被結合在一起的連接 -部份處。 驅動單元18基本上包含前曲柄組41，後齒輪箱單元 43，鏈條44，前撥鏈器45，及後撥鏈器46。前曲柄組41 • 被設置在自行車10的底部托架上。後齒輪箱單元43以不 可旋轉的方式被安裝於後車輪22的自由輪轂。鏈條44被 配置在前曲柄組41及後齒輪箱單元43上成爲跨越二者之 間。前撥鏈器45及後撥鏈器46作用成爲檔位改變裝置。 如圖2及3所示，前曲柄組4 1基本上包含曲柄軸總 成或底部托架總成5 0，右曲柄臂5 1，左曲柄臂5 2，及一 對踏板5 3 (圖1 )。底部托架總成5 〇較佳地具有藉著一 對（左及右）軸承殼體（例如第一及第二軸承支撐構件） • 55及56，管形連接構件57，一對（左及右）軸承58及 59’以及一對（左及右）覆蓋構件6〇及61而可旋轉地支 撐在車架12的懸架部40上的曲柄軸54。管形連接構件 57同心地連結左及右軸承殼體55及56。左及右軸承58 及59被安裝在左及右軸承殼體55及56上。左及右覆蓋 構件60及61被安裝在曲柄軸54與左及右軸承58及59 之間。 右曲柄臂5 1較佳地藉著適當的固定方法例如嵌塞（ caulking) ’黏結’或熔接而固定地耦接於曲柄軸54的右 -10- (7) (7)1305762 端部’以使得右曲柄臂51成整體地耦接於曲柄軸5 4。左 曲柄臂52被可移去地緊固於曲柄軸54的左端部。踏板 53被安裝於右及左曲柄臂51及52的梢端或自由端部。 曲柄軸54較佳地爲具有高度剛性的合金中空管形構 件’例如由鉻鉬鋼製成。如圖3及4所示，曲柄軸54的 左端部部份包含母（內螺紋）螺旋部份54a及多個外部据 齒5 4b。母（內螺紋）螺旋部份5 4 a被設置在曲柄軸5 4 的左端部部份的內圓周表面上，使得緊固螺栓62被旋入 母螺旋部份.54a內來緊固左曲柄臂52。鋸齒54b被設置 在曲柄軸54的左端部部份的外圓周表面上，以在上面不 可旋轉地連結左曲柄臂52。 軸承殻體55及56被壓入配合至懸架部40的兩端部 內。軸承殼體55及56較佳地由非金屬材料形成，例如覆 蓋軸承58及59上的外圓周表面的硬質樹脂材料。但是， 軸承殼體55及56可由具有容許軸承殼體55及56可被壓 入配合至懸架部40的兩端部內的性質的金屬材料形成， 例如鋁。因此’具有比懸架部4 0小的硬度的材料均可被 用來形成軸承殼體55及56，不論材料是否爲金屬。軸承 殻體55及56形成爲且被配置成分別被壓入配合至懸架部 40的左及右端部內。 左及右軸承殼體55及56爲帶台階的管形構件，其分 別包含一對（左及右）軸承扣持區段或部份55a及55b， 一對（左及右）安裝區段或部份55b及56b，以及寸（ 左及右）環狀抵靠區段或部份55c及56c。軸承58及59 -11 - (8) 1305762 被分開地扣持及儲存在軸承扣持區段55a及56a中。軸承 扣持區段5 5 a及5 6 a被不可旋轉地安裝於懸架部4 0的軸 向端部部份中。如圖3及4中所見的’軸承扣持區段55a - 及5 6a相對於安裝區段5 5 b及5 6b被設置在軸向外側，且 -具有比安裝區段55b及56b大的極大直徑。安裝區段55b 及56b連接於連接構件57的端部。環狀抵靠區段55c及 5 6 c的每一個形成外側或外部抵靠表面，以界定底部托架 φ 相對於懸架部4 0的軸向位置。 連接構件5 7爲具有可供曲柄軸5 4穿過的內部直徑的 管狀構件。連接構件57在其軸向端部處耦接於左及右軸 承殼體55及56的安裝區段5 5b及5 6b的內邊緣。如圖3 中所見的，兩個〇形環68及69較佳地分別被安裝在連 接構件5 7與軸承殼體5 5及5 6的連接部份上。連接構件 5 7作用成爲密封結構，用來防止外來物體例如水’沙， 污泥，或類似者從外部穿透至軸承58及59內。 # 軸承58及59較佳地爲滾珠軸承或滾柱軸承’其包含 內環件或座圈58a及59a以及外環件或座圈58b及59b， 而多個滾動構件（亦即滾珠軸承）58c及59c被設置在內 座圈與外座圈之間。在此實施例中，左軸承58構成第一 軸承，而右軸承59構成第二軸承。軸承58及59被設置 成爲使得內環件5 8 a及5 9a朝向軸向方向的外側的移動（ 軸承5 8在圖3中的左側，而軸承5 9在圖3中的右側）分 別經由覆蓋構件60及6 1而被左及右曲柄臂52及5 1限制 ，並且外環件5 8 b及5 9 b朝向軸向方向的內側的移動（軸 -12- (9) (9)1305762 承5 8在圖3中的左側，而軸承5 9在圖3中的右側）分別 被軸承殼體5 5及5 6限制。軸承5 8及5 9較佳地爲密封式 工業軸承’其中密封件被分別安裝在內環件58a及59a與 外環件58b及59b之間’並且滑脂被預先塡入軸承58及 5 9中。因此，可省略軸承5 8及5 9的潤滑維護。因此， 以如上所述的底部托架總成5 〇的配置，曲柄軸5 4的軸向 長度可藉著將軸承58及59於軸向方向放置在懸架部40 的內部而加長。因此，底部托架總成50的重量可藉著使 曲柄軸54形成爲中空狀而減小，而同時可將曲柄軸54的 強度及剛性保持於高位準。 覆蓋構件6G及61爲例如硬質樹脂構件，其覆蓋軸承 殼體55及56上的圓周表面。覆蓋構件60及61被設置成 爲使得覆蓋構件60及61分別被夾在左及右曲柄臂52及 51與軸承58及59的內環件58a及59a之間。 如圖3中所見的，右曲柄臂51爲齒輪曲柄（gear crank )’其具有以可移去的方式安裝在上面的一對鏈環 或鏈輪71及72。右曲柄臂51被固定地耦接於曲柄軸54 的右端部。右曲柄臂51的內邊緣表面被設置成爲經由覆 蓋構件61而壓軸承59。左曲柄臂52也於中心部份不可 旋轉地連接於曲柄軸54。特別是，左曲柄臂52藉著形成 在曲柄軸5 4上的鋸齒而以某一旋轉相位不可旋轉地耦接 於曲柄軸54。左曲柄臂5 2經由覆蓋構件6 0於軸向方向 壓軸承58。左曲柄臂52藉著緊固螺栓62而固定地耦接 於曲柄軸54。底部托架總成50形成爲且被配置成使得藉 -13- (10) 1305762 著旋動緊固螺栓62，可使左及右曲柄臂52及51軸向 軸承58及59。因此，軸承58及59的軸承游隙可被調 。左曲柄臂52具有狹縫52a，其形成爲連接左曲柄臂 的連接孔52b以安裝曲柄軸54。左曲柄臂52是藉著旋 如圖3中所見的位在曲柄軸54的底部上的兩個安裝螺 67a及6 7b而被強力地固定在曲柄軸54上。如此，狹 52a的狹縫寬度藉著旋緊延伸橫越狹縫52a的安裝螺 67a及67b而變窄’以將左曲柄臂52強力地固定在曲 軸54上。此二安裝螺栓67a及67b爲例如六角凹頭螺 ’並且螺栓頭部較佳地從不同方向被插入。 當如上所述的本發明的底部托架總成50被安裝在 架部40上時，首先軸承58及59以及覆蓋構件60及 被安裝在左及右軸承殻體55及56上。另外，連接構 57被安裝在軸承殼體55及56中的一個上。在此狀態 ’軸承殼體55及56分別被壓入配合至懸架部40的相 端部內。 其次，固定地連接有齒輪曲柄臂51的曲柄軸54從 承殼體5 6之側被插入。左曲柄臂5 2被安裝在從左軸承 體55軸向向外凸出的曲柄軸54的端部上。左曲柄臂 以與右曲柄臂5 1偏離1 8 0度的旋轉相位定向被安裝。 然後’緊固螺栓62被螺旋於曲柄軸54的母螺旋部 5 4a ’並且左曲柄臂52被固定在曲柄軸54上。曲柄軸 是藉著旋緊緊固螺栓62而朝向圖3中的左側移動，並 右及左曲柄臂51及52的內邊緣表面經由覆蓋構件60 壓 整 5 2 緊 栓 縫 栓 柄 栓 懸 61 件 中 反 軸 殻 5 2 份 54 且 及 -14- (11) l3〇5762 _ 6 1而在軸承5 8及5 9的內環件5 8 a及5 9 a上施加向內壓 .力。 . 因此’本發明的第一實施例的底部托架總成的特徵在 於軸承殼體5 5及5 6被壓入配合至懸架部4 0內，使得軸 承58及59被定位在懸架部40的軸向端部的軸向內側。 另外，因爲軸承殼體55及56是由樹脂製成且用壓入配合 的方式耦接在懸架部40內，所以此種結構容許懸架部40 I 的軸向長度與日本專利公開第2004-249770號中所揭示的 傳統設計的長度相比較長。因此，以本發明的此結構可增 加安裝於圓柱形懸架部40的區域的零件的設計自由度， 例如鏈撐（亦即自行車車架的零件）應被裝附的位置。另 外，因爲本發明的底部托架總成50具有被夾在樹脂軸承 殻體55及56與樹脂覆蓋構件60及61之間的軸承58及 59 ’所以使用者可容易地將成爲一對單元的底部托架總成 50以壓入配合的方式耦接至懸架部40內。由樹脂製成的 B 軸承殻體55及56也導致重量的減輕及踩踏期間噪音的降 低。 第二實施例 現在參考圖5及6，以下說明根據第二實施例的自行 車底部托架總成150。除了第一實施例的軸承殼體55及 5 6由根據第二實施例的一對經修改的軸承殻體〗5 5及i 5 6 取代之外，第二實施例的底部托架總成1 5 0相同於第一實 施例的底部托架總成5 0。鑑於第一及第二實施例之間的 -15- (12) 1305762 相似性’與第一實施例的部份相同的第二實施例 被給予與第一實施例的部份相同的參考數字。另 潔起見可能省略與第一實施例的部份相同的第二 部份的敘述。 因此，底部托架總成150包含由左及右軸承 及156可旋轉地支撐在經修改的懸架部14〇上 54，其中左及右軸承殻體155及156支撑管形 57及裝附有覆蓋構件60及61的軸承58及59。 經修改的軸承殼體1 5 5及1 5 6，較佳地使用經修 部140，其相反端部設置有環狀凹入部份140a: 在此第二實施例中，環狀抵靠區段已從軸承殼| 156去除。而是，軸承殼體155及156分別具有 軸承58及59的軸向內側的其他外部抵靠部份， 由經修改的懸架部140的環狀凹入部份140a及 成的經修改的懸架部1 4 0的內部抵靠部，以界定 相對於經修改的懸架部1 4 0的軸向位置。 如同在先前的實施例中，軸承殻體155及1 施例中也被壓入配合至經修改的懸架部1 4 0的兩 軸承殻體155及156較佳地由非金屬材料形成， 軸承58及59上的外圓周表面的硬質樹脂材料。 承殼體155及156可由具有容許軸承殻體155及 壓入配合至經修改的懸架部1 40的兩端部內的性 材料形成，例如鋁。因此，具有比懸架部1 40小 材料均可被用來形成軸承殼體1 5 5及1 5 6，不論 的部份會 外，爲簡 實施例的 :殼體155 的曲柄軸 連接構件 鑑於使用 改的懸架 及 140b ° 豊155及 被定位在 用來接合 140b所形 底部托架 5 6在此實 端部內。 例如覆蓋 但是，軸 156可被 質的金屬 的硬度的 材料是否 -16- (13) 1305762 爲金屬。軸承58及59形成爲且被配置成分別 至軸承殼體155及156內。 此處所用來敘述本發明的以下方向術語「 ’上方，向下，直立，水平，下方，及橫向」 他類似的方向術語指的是配備有本發明的自行 因此，這些術語在被用來敘述本發明時應相對 發明的自行車被解讀。在瞭解本發明的範圍時 的術語「包含」及其衍生字是指明確界定所述 件’組件，群類，整數，及/或步驟的存在但 他未述及的特徵，元件，組件，群類，整數， 的存在的開放式術語。此也適用於具有類似意 例如術語「包括」，「具有」，及其衍生字。 「構件」或「元件」在以單數使用時可具有單 個部件的雙重意義。最後，此處所用的程度術 致或實質上」，「大約」，及「幾近」表示其 語具有使得最終結果不會大幅改變的合理偏差 語應被解讀爲包含所修飾的術語的至少±5%的 此偏差不會否定所修飾的字的意義。 雖然只選擇選定的實施例來舉例說明本發 於熟習此項技術者而言從此揭示很明顯，在不 的申請專利範圍所界定的本發明的範圍下，可 同的改變及修正。另外’以上根據本發明的實 只是舉例說明用，而非限制由附隨的申請專利 效物所界定的本發明。 被壓入配合 向前，向後 以及任何其 車的方向。 於配備有本 ，此處所用 的特徵，元 是不排除其 及/或步驟 義的字眼， 並且，術語 一部件或多 語例如「大 所修飾的術 量。這些術 偏差，只要 明，但是對 離開由附隨 實施各種不 施例的敘述 範圍及其等 -17- (14) 1305762 【圖式簡單說明】 圖1爲具有根據本發明的第一實施例的自行車底部托 ' 架總成的自行車的整體右側視圖。 - 圖2爲圖1所不的自行車的自行車車架的懸架部的放 大部份立體圖’其中根據本發明的第一實施例的底部托架 安裝在懸架部內。 ® 圖3爲根據本發明的第一實施例的底部托架總成的橫 向剖面圖。 圖4爲根據本發明的第一實施例的底部托架總成的左 側部份的放大部份剖面圖。 圖5爲根據本發明的第二實施例的底部托架總成的橫 向剖面圖。 圖6爲根據本發明的第二實施例的底部托架總成的左 側部份的放大部份剖面圖。 【主要元件符號說明】 1 0 :自行車 . 12 :車架 14 :前叉 1 6 :車把單元 1 8 :驅動單元 20 :前車輪 22 :後車輪 -18- (15)1305762 24 ： 2 6 ·· 28 ： 3 0 · 32 ： 3 4 ： 36 ：Pattern. In view of the above, it will be apparent to those skilled in the art that there is a need for an innovative bicycle crankshaft bearing assembly or bottom bracket. * The present invention addresses this need in the art as well as other needs, which will become apparent to those skilled in the art from this disclosure. SUMMARY OF THE INVENTION One object of the present invention is to provide a bicycle bottom bracket assembly having a non-metallic bearing support member or a bearing in a housing that is held within the end of the suspension portion of the bicycle frame. Another object of the present invention is to provide a bicycle bottom bracket assembly that is relatively lightweight. Another object of the present invention is to provide a bicycle bottom bracket assembly that does not require the end of the suspension portion of the bicycle frame to be threaded. The above objects are basically attained by providing a bicycle bottom bracket assembly including first and second bearing support members (housings), and first and second bearings such that the bottom bracket is generally formed and It is configured to be mounted within a suspension portion of a bicycle frame. The suspension portion of the bicycle frame has a first open end and a second open end. The first and second bearing support members are press fit into the first and second open ends of the suspension portion, respectively. The first and second bearings are respectively fastened to the first and second bearing support members such that the first and second bearings respectively engage the first and second bearings in the outer race of each of the first and second bearings Below the support member is disposed inside the suspension portion. The crankshaft is rotatably supported in the suspension portion of the -7-(4) 1305762 by the inner seat of the first and second bearings, wherein the first axial end portion of the crankshaft is disposed in the suspension portion An open end portion and a second axial end portion of the crank shaft is disposed at the second open end of the suspension portion. - According to an aspect of the invention, the bottom bracket assembly is characterized in that the bearing housing is press fit into the cylindrical suspension portion such that the bearing is axially positioned to the inside of the axial end of the cylindrical suspension portion or The axial end of the cylindrical suspension portion is flush. According to another aspect of the invention, the bottom bracket assembly is characterized in that the bearing support member (housing) is made of a non-metallic material (e.g., resin) and is coupled to the cylindrical suspension in a press fit manner. Inside the department. As such, this configuration allows the axial length of the cylindrical suspension portion to be longer than the length of the conventional design discussed above, and increases the degree of design freedom of the components attached to this region of the bicycle frame. In addition, since the bottom bracket assembly of the present invention includes a bearing that is sandwiched between the bearing housing and the cover member, the user can easily couple the bottom bracket that becomes a unit in a press-fit manner to # Inside the cylindrical suspension. Preferably, the bearing housing is made of resin. Such a bearing housing made of resin results in a reduction in weight and a reduction in noise during pedaling. These and other objects of the present invention will be apparent from the following detailed description of the preferred embodiments of the invention. Reference will now be made to the drawings which form part of this original disclosure. [Embodiment] - 8 - (5) (5) 1305762 Selected embodiments of the present invention will be described below with reference to the drawings. It will be apparent to those skilled in the art that the following description of the embodiments of the present invention is intended to be illustrative only and not as limited by the scope of the accompanying claims this invention. Referring first to Fig. 1', a bicycle 10 equipped with a first embodiment of the present invention is shown. In this example, the bicycle ίο is a road bicycle having a diamond-shaped frame 12 in which the frame 12 has a triangular front tripod and a triangular rear tripod disposed behind the front tripod. The frame 12 acts as a frame for the bicycle body. The frame 12 has a front fork 14' pivotally supported on the front portion of the frame 12 such that the front fork 14 is free to rotate about an axis slightly inclined from the slanting direction. The lower or bottom of the front fork 14 is divided into two forks. The bicycle 10 is also provided with an irop-type handlebar unit 16 connected to the front fork, and a drive unit 18 provided on the lower portion of the frame 12. The drive unit 18 is formed to convert the pedaling force into a drive. The front wheel 20 is supported on the bottom end of the front fork 14 in a freely rotatable manner, and the rear wheel 22 is supported on the rear of the frame 12 in a freely rotatable manner. Of course, the bicycle 10 can be used as needed. / or other components as desired. The frame 12 is basically formed by a top tube 24, a lower tube 26, a head tube 28, a seat tube 30' pair of seat stays 32, and a pair of chain stays 34. The top tube 24 is formed. The lower tube 26 is disposed below the top tube 24 such that the lower tube 26 is inclined obliquely upward toward the front. The head tube 28 joins the front end portions of the top tube 24 and the lower tube 26 together. 3〇 extends diagonally upward and joins the rear end portions of the top tube 24 and the lower tube 26. -9- (6) 1305762 The bicycle 10 is also provided with a seat post 3 6, and the saddle 3 8 is fastened to Seatpost 36. The seat post 36 is fixed in the seat tube 30 so that the position of the seat post 36 can be adjusted up and down in an upright direction. A cylindrical or tubular suspension portion 40 (shown in Fig. 2) is formed at the joint portion where the seat tube 30 and the lower tube 26 are joined together. The drive unit 18 basically includes a front crank group 41 and a rear gear box unit 43. a chain 44, a front derailleur 45, and a rear derailleur 46. The front crankset 41 is disposed on the bottom bracket of the bicycle 10. The rear gearbox unit 43 is mounted to the rear wheel 22 in a non-rotatable manner. The freewheel hubs are disposed on the front crankset 41 and the rear gearbox unit 43 to be spanned therebetween. The front derailleur 45 and the rear derailleur 46 act as gear shifting devices. It is shown that the front crank set 4 1 basically comprises a crank axle assembly or a bottom bracket assembly 50, a right crank arm 5 1, a left crank arm 5 2, and a pair of pedals 5 3 (Fig. 1). 5 〇 preferably has a pair of (left and right) bearing housings (eg, first and second bearing support members) • 55 and 56, tubular connecting members 57, a pair of (left and right) bearings 58 And a pair of (left and right) covering members 6 and 61 rotatably supported by the suspension portion 40 of the frame 12 The crank shaft 54. The tubular connecting member 57 concentrically connects the left and right bearing housings 55 and 56. The left and right bearings 58 and 59 are mounted on the left and right bearing housings 55 and 56. The left and right covering members 60 And 61 are mounted between the crankshaft 54 and the left and right bearings 58 and 59. The right crank arm 51 is preferably fixedly coupled by a suitable fixing method such as caulking 'bonding' or welding. The right -10 (7) (7) 1305762 end portion of the crankshaft 54 is such that the right crank arm 51 is integrally coupled to the crankshaft 54. The left crank arm 52 is removably fastened to the left end of the crankshaft 54. The pedal 53 is attached to the tip or free end of the right and left crank arms 51 and 52. The crank shaft 54 is preferably an alloy hollow tubular member having a high rigidity, e.g., made of chrome molybdenum steel. As shown in Figs. 3 and 4, the left end portion of the crank shaft 54 includes a female (internal thread) spiral portion 54a and a plurality of external teeth 5 4b. A female (internal thread) spiral portion 524a is provided on the inner circumferential surface of the left end portion of the crank shaft 514, so that the fastening bolt 62 is screwed into the female spiral portion .54a to fasten the left crank arm. 52. The serration 54b is provided on the outer circumferential surface of the left end portion of the crank shaft 54 to non-rotatably couple the left crank arm 52 thereon. The bearing housings 55 and 56 are press-fitted into both end portions of the suspension portion 40. The bearing housings 55 and 56 are preferably formed of a non-metallic material such as a hard resin material covering the outer circumferential surfaces of the bearings 58 and 59. However, the bearing housings 55 and 56 may be formed of a metal material having a property of allowing the bearing housings 55 and 56 to be press-fitted into both end portions of the suspension portion 40, such as aluminum. Therefore, a material having a hardness smaller than that of the suspension portion 40 can be used to form the bearing housings 55 and 56 regardless of whether the material is metal or not. The bearing housings 55 and 56 are formed and configured to be press fit into the left and right ends of the suspension portion 40, respectively. The left and right bearing housings 55 and 56 are stepped tubular members that respectively include a pair of (left and right) bearing retaining sections or portions 55a and 55b, a pair of (left and right) mounting sections or Portions 55b and 56b, as well as inches (left and right), abut the segments or portions 55c and 56c. Bearings 58 and 59 -11 - (8) 1305762 are separately held and stored in bearing retaining sections 55a and 56a. The bearing holding sections 5 5 a and 5 6 a are non-rotatably attached to the axial end portions of the suspension portion 40. As seen in Figures 3 and 4, the bearing retaining sections 55a - and 65a are disposed axially outward with respect to the mounting sections 5 5 b and 56b, and - have a greater maximum than the mounting sections 55b and 56b diameter. The mounting sections 55b and 56b are connected to the ends of the connecting member 57. Each of the annular abutment sections 55c and 5 6 c forms an outer or outer abutment surface to define an axial position of the bottom bracket φ relative to the suspension portion 40. The connecting member 57 is a tubular member having an inner diameter through which the crank shaft 54 can pass. The connecting member 57 is coupled at its axial ends to the inner edges of the mounting sections 55b and 56b of the left and right bearing housings 55 and 56. As seen in Fig. 3, two ring-shaped rings 68 and 69 are preferably mounted on the connecting portions of the connecting member 57 and the bearing housings 5 5 and 56, respectively. The connecting member 57 acts as a sealing structure for preventing foreign objects such as water & sand, sludge, or the like from penetrating into the bearings 58 and 59 from the outside. #轴承58 and 59 are preferably ball bearings or roller bearings 'which include inner ring members or races 58a and 59a and outer ring members or races 58b and 59b, and a plurality of rolling members (i.e., ball bearings) 58c And 59c is disposed between the inner race and the outer race. In this embodiment, the left bearing 58 constitutes a first bearing and the right bearing 59 constitutes a second bearing. The bearings 58 and 59 are disposed such that the inner ring members 58 8 a and 59 9a move toward the outer side in the axial direction (the bearing 58 is on the left side in Fig. 3, and the bearing 59 is on the right side in Fig. 3) respectively. The members 60 and 61 are constrained by the left and right crank arms 52 and 51, and the outer ring members 5 8 b and 5 9 b move toward the inner side in the axial direction (axis-12-(9)(9)1305762 5 8 is on the left side in FIG. 3, and bearing 59 is on the right side in FIG. 3) is limited by bearing housings 5 5 and 56, respectively. The bearings 5 8 and 59 are preferably sealed industrial bearings 'where the seals are respectively mounted between the inner ring members 58a and 59a and the outer ring members 58b and 59b' and the grease is pre-loaded into the bearings 58 and 59. in. Therefore, the lubrication maintenance of the bearings 58 and 59 can be omitted. Therefore, in the arrangement of the bottom bracket assembly 5 如上 as described above, the axial length of the crank shaft 54 can be lengthened by placing the bearings 58 and 59 in the axial direction inside the suspension portion 40. Therefore, the weight of the bottom bracket assembly 50 can be reduced by making the crank shaft 54 hollow, while at the same time maintaining the strength and rigidity of the crank shaft 54 at a high level. The covering members 6G and 61 are, for example, hard resin members covering the circumferential surfaces on the bearing housings 55 and 56. The cover members 60 and 61 are disposed such that the cover members 60 and 61 are sandwiched between the left and right crank arms 52 and 51 and the inner ring members 58a and 59a of the bearings 58 and 59, respectively. As seen in Fig. 3, the right crank arm 51 is a gear crank which has a pair of links or sprockets 71 and 72 mounted thereon in a removable manner. The right crank arm 51 is fixedly coupled to the right end of the crankshaft 54. The inner edge surface of the right crank arm 51 is disposed to press the bearing 59 via the cover member 61. The left crank arm 52 is also non-rotatably coupled to the crank shaft 54 at the center portion. In particular, the left crank arm 52 is non-rotatably coupled to the crankshaft 54 at a certain rotational phase by means of serrations formed on the crankshaft 54. The left crank arm 5 2 presses the bearing 58 in the axial direction via the covering member 60. The left crank arm 52 is fixedly coupled to the crank shaft 54 by a fastening bolt 62. The bottom bracket assembly 50 is formed and configured such that the fastening bolts 62 are rotated by the -13-(10) 1305762, and the left and right crank arms 52 and 51 can be axially supported by the bearings 58 and 59. Therefore, the bearing clearance of the bearings 58 and 59 can be adjusted. The left crank arm 52 has a slit 52a formed to connect the connecting hole 52b of the left crank arm to mount the crank shaft 54. The left crank arm 52 is strongly fixed to the crank shaft 54 by rotating the two mounting screws 67a and 67b on the bottom of the crank shaft 54 as seen in Fig. 3. Thus, the slit width of the slit 52a is narrowed by tightening the mounting screws 67a and 67b extending across the slit 52a to strongly fix the left crank arm 52 to the crank shaft 54. The two mounting bolts 67a and 67b are, for example, hex socket nuts and the bolt heads are preferably inserted from different directions. When the bottom bracket assembly 50 of the present invention as described above is mounted on the frame portion 40, the bearings 58 and 59 and the cover member 60 are first mounted on the left and right bearing housings 55 and 56. Further, the connecting structure 57 is mounted on one of the bearing housings 55 and 56. In this state, the bearing housings 55 and 56 are press-fitted into the end portions of the suspension portion 40, respectively. Next, the crank shaft 54 to which the gear crank arm 51 is fixedly coupled is inserted from the side of the bearing housing 56. The left crank arm 52 is mounted on the end of the crank shaft 54 projecting axially outward from the left bearing body 55. The left crank arm is mounted in a rotational phase orientation that is offset from the right crank arm 5 1 by 180 degrees. Then, the fastening bolt 62 is screwed to the female screw portion 5 4a ' of the crank shaft 54 and the left crank arm 52 is fixed to the crank shaft 54. The crankshaft is moved toward the left side in FIG. 3 by tightening the fastening bolts 62, and the inner edge surfaces of the right and left crank arms 51 and 52 are pressed by the cover member 60. The middle and reverse shaft shells 5 2 parts 54 and -14-(11) l3〇5762 _ 6 1 exert an inward pressing force on the inner ring members 5 8 a and 5 9 a of the bearings 5 8 and 59. Therefore, the bottom bracket assembly of the first embodiment of the present invention is characterized in that the bearing housings 5 5 and 56 are press-fitted into the suspension portion 40 such that the bearings 58 and 59 are positioned at the suspension portion 40. The axial inner side of the axial end. In addition, since the bearing housings 55 and 56 are made of resin and are coupled into the suspension portion 40 by press-fitting, such a structure allows the axial length of the suspension portion 40 I and Japanese Patent Laid-Open No. 2004-249770 The length of the conventional design disclosed in the number is longer. Therefore, with this configuration of the present invention, the degree of freedom in designing the parts mounted in the area of the cylindrical suspension portion 40 can be increased, for example, the position where the chain stay (i.e., the parts of the bicycle frame) should be attached. In addition, since the bottom bracket assembly 50 of the present invention has the bearings 58 and 59' sandwiched between the resin bearing housings 55 and 56 and the resin covering members 60 and 61, the user can easily become a pair of units. The bottom bracket assembly 50 is coupled into the suspension portion 40 in a press fit manner. The B bearing housings 55 and 56 made of resin also cause weight reduction and noise reduction during pedaling. SECOND EMBODIMENT Referring now to Figures 5 and 6, a bicycle bottom bracket assembly 150 in accordance with a second embodiment will now be described. The bottom bracket assembly 1 of the second embodiment is replaced by a pair of modified bearing housings 755 and i 5 6 according to the second embodiment, except that the bearing housings 55 and 56 of the first embodiment are replaced. 50 is the same as the bottom bracket assembly 50 of the first embodiment. The second embodiment in which the -15-(12) 1305762 similarity between the first and second embodiments is the same as that of the first embodiment is given the same reference numerals as the parts of the first embodiment. The description of the second part which is the same as that of the first embodiment may be omitted for the sake of clarity. Thus, the bottom bracket assembly 150 includes rotatably supported by the left and right bearings and 156 on the modified suspension portion 14A, wherein the left and right bearing housings 155 and 156 support the tubular shape 57 and are covered with a cover Bearings 58 and 59 of members 60 and 61. The modified bearing housings 15 5 and 156 preferably use a repaired portion 140 with opposite end portions provided with an annular recessed portion 140a: In this second embodiment, the annular abutment region The segment has been removed from the bearing housing | 156. Rather, the bearing housings 155 and 156 have other outer abutment portions of the axially inner sides of the bearings 58 and 59, respectively, and the annular recessed portion 140a of the modified suspension portion 140 and the modified suspension portion. An internal abutment of 140 to define an axial position relative to the modified suspension portion 140. As in the previous embodiment, the two bearing housings 155 and 156 of the bearing housings 155 and 1 that are also press fit into the modified suspension portion 140 are preferably formed of a non-metallic material, bearing 58. And a hard resin material on the outer circumferential surface of 59. The housings 155 and 156 may be formed of a material having a bearing housing 155 and a press fit into the ends of the modified suspension portion 140, such as aluminum. Therefore, a material having a smaller material than the suspension portion 140 can be used to form the bearing housings 15 5 and 156. Regardless of the portion, the crankshaft connecting member of the housing 155 is used for the sake of simplicity. The modified suspension and 140b 豊 155 are positioned in the solid end portion of the bottom bracket 56 for engaging 140b. For example, the cover 156 can be made of a metal having a hardness of -16- (13) 1305762 as a metal. Bearings 58 and 59 are formed and configured to be within bearing housings 155 and 156, respectively. The following directional terms "upper, downward, erect, horizontal, lower, and lateral" are used herein to describe the invention. The similar directional term refers to the self-equipped with the present invention. Therefore, these terms are used to describe The invention should be interpreted in relation to the bicycle of the invention. The term "comprising" and its derivatives when referring to the scope of the present invention refers to features, elements, components, groups that explicitly define the existence of the component 'component, group, integer, and/or step. An open term for the existence of classes, integers. This also applies to similar meanings such as the terms "including", "having", and their derivatives. "Component" or "component" may have the dual meaning of a single component when used in the singular. Finally, the degree of procedural or substantive use herein, "about", and "nearly" means that the language has a reasonable deviation that the final result does not change significantly should be interpreted as containing at least ± of the modified term. A deviation of 5% does not negate the meaning of the modified word. While only selected embodiments have been chosen to exemplify the invention, it will be apparent from the scope of the invention, which may be modified and modified in the scope of the invention as defined by the appended claims. Further, the above description of the present invention is intended to be illustrative only and not to limit the invention as defined by the accompanying claims. Pressed into the forward, backward and any direction of the car. With the features used herein, the elements are words that do not exclude them and/or the meaning of the steps, and the term one or more words such as "large modified amount of surgery. These deviations, as long as they are clear, but Leaving the scope of the description by the accompanying implementation of various embodiments and the like -17-(14) 1305762 [Simplified illustration of the drawings] FIG. 1 is a bicycle having a bicycle bottom bracket assembly according to the first embodiment of the present invention. Figure 2 is an enlarged partial perspective view of the suspension portion of the bicycle frame of the bicycle of Figure 1 in which the bottom bracket according to the first embodiment of the present invention is mounted in the suspension portion. A cross-sectional view of a bottom bracket assembly in accordance with a first embodiment of the present invention. Fig. 4 is an enlarged partial cross-sectional view showing a left side portion of a bottom bracket assembly in accordance with a first embodiment of the present invention. A cross-sectional view of a bottom bracket assembly in accordance with a second embodiment of the present invention. Fig. 6 is an enlarged partial cross-sectional view showing a left side portion of a bottom bracket assembly in accordance with a second embodiment of the present invention. symbol Description] 1 0 : Bicycle. 12 : Frame 14 : Front fork 1 6 : Handlebar unit 1 8 : Drive unit 20 : Front wheel 22 : Rear wheel -18- (15) 1305762 24 : 2 6 ·· 28 : 3 0 · 32 : 3 4 : 36 :
40 ： 4 1 ： 43 ： 4 4 ： 45 ： 46 : 50 ：40 : 4 1 : 43 : 4 4 : 45 : 46 : 50 :
5 2 ： 52a 52b 53 : 54 : 54a 54b 5 5 ·· 頂管 下管 頭管 座管 座撐 鏈撐 座柱 鞍座 圓柱形或管狀懸架部 前曲柄組 後齒輪箱單元 鏈條 前撥鏈器 後撥鏈器 曲柄軸總成或底部托架總成 右曲柄臂 左曲柄臂 :狹縫 :連接孔 踏板 曲柄軸 :母（內螺紋）螺旋部份 =外部鋸齒 左軸承殼體（第一軸承支撐構件） -19- (16) 1305762 5 5 a :左軸承扣持區段或部份 ' 55b :左安裝區段或部份 5 5 c :左環狀抵靠區段或部份 • 56 :右軸承殼體（第二軸承支撐構件） 5 6 a :右軸承扣持區段或部份 56b :右安裝區段或部份 56c :右環狀抵靠區段或部份 φ 57 :管形連接構件 5 8 :左軸承 58a:內環件或座圈 5 8 b :外環件或座圈 5 8 c :滾動構件（滾珠軸承） 5 9 :右軸承 59a :內環件或座圈 59b :外環件或座圈 φ 59c :滾動構件（滾珠軸承） 60 :左覆蓋構件 61 :右覆蓋構件 62 :緊固螺栓 67a :安裝螺栓 • 67b :安裝螺栓 6 8 : 0形環 6 9 : Ο形環 7 1 :鏈環或鏈輪 -20- (17) (17)1305762 72 :鏈環或鏈輪 140 :懸架部 140a :環狀凹入部份 140b :環狀凹入部份 1 5 0 :自行車底部托架總成 155 :左軸承殼體 1 5 6 :右軸承殼體5 2 : 52a 52b 53 : 54 : 54a 54b 5 5 ·· Top tube lower tube head tube seat tube support chain support column saddle cylindrical or tubular suspension front crank group rear gear box unit chain front derailleur Dipper crankshaft assembly or bottom bracket assembly right crank arm left crank arm: slit: connecting hole pedal crankshaft: female (internal thread) helical portion = outer serrated left bearing housing (first bearing support member -19- (16) 1305762 5 5 a : Left bearing retaining section or part ' 55b : Left mounting section or part 5 5 c : Left annular abutment section or part • 56 : Right bearing Housing (second bearing support member) 5 6 a : right bearing holding portion or portion 56b: right mounting portion or portion 56c: right annular abutting portion or portion φ 57 : tubular connecting member 5 8 : Left bearing 58a: Inner ring or race 5 8 b : Outer ring or race 5 8 c : Rolling member (ball bearing) 5 9 : Right bearing 59a : Inner ring or race 59b : Outer ring Piece or race φ 59c : rolling member (ball bearing) 60 : left cover member 61 : right cover member 62 : fastening bolt 67a : mounting bolt • 67b : mounting bolt 6 8 : O-ring 6 9 : Ring-shaped ring 7 1 : Link or sprocket -20- (17) (17) 1305762 72: Link or sprocket 140: Suspension 140a: Annular recessed portion 140b: Ring Recessed part 1 50: bicycle bottom bracket assembly 155: left bearing housing 1 5 6 : right bearing housing