200804130 九、發明說明： 【發明所屬之技術領域】 广本發明主要是應用在自行車，影響自行車中的曲 底部托架軸及其支撐座，隹人 柄’ 車動力傳動元件可信度之^。〜歹，針對量輕並增加自名 【先前技術】 旦二場持久的革命過程在自行車界發生已久，就組件的重 =而s ’只要這些改變不會影響堅固性及可靠性，邏輯上常 藉由減y作用力需求或提供騎士增加速度來改進性能。 明確地說，曲柄臂目前一般是使用通常是以鋁（美國專 利第6755095號、美國專利第6612〇33號、美國專利第65'〇8〇〇2 嬈、美國專利第6314834號、美國專利第6227070號、歐洲 專利第1 120336號及美國專利第5988016號）製成的中空元 件，而碳纖維曲柄臂通常是填充以鋁及泡綿填充物（美國專 利弟7 013 7 5 3说、美國專利第g § g g 4 〇 2號、歐洲專利第15 71 〇 7 5 遽）’成本較高且通常較不可靠但可以如中空鋁元件一般輕， 但也可能因為包含太空技術或僅只是流行而有特殊訴求。在 任何情形中’可以說那些中空鍛造銘所製成的元件需要更多 技術投資，只與非常大系列的製造有關聯，而那些碳製成的 則通常與更高技術及更小產量有關，已開放市場給更多的生 產者，雖然目前當然也有使用複的高科技應用在自行車產業 大系列製造的例子。 200804130 關於底部托架，最近這些年已相當普遍運用外部軸承（美 國專利第6755095號、德國專利第19751879號），將軸承殼 或底部托架杯體（BB Cup )定位在組成托架的自行車管段外 部:14已因其削，咸了可能太大、較不需要且愈分開愈支持軸 =彈性運動㈣承*得到證明；並允許使用較大半徑的轴（通 常f中空且極輕）’因為對預魏扭性（torsion resistance) 而σ，直徑愈大需要的軸區段愈低（且因此軸重量愈小）。 使用外部軸承的踏板構造通常是與使用滑動轴結合（美 國專利第6755095號‘、美國專利公開第2〇〇5〇113〇4號），音 謂在軸向運動並不受限制，這種情形中則為支❹的輛^ 位之曲柄臂。既然這牽㈣滑動軸，—旦其被安裝在自行車 上’它們會被組裝在各別的軸承座’使其在安裝及維修 易使用。 既然軸總是可經由一側進入’通常被製成「整合軸 (integrated spindle)」，藉此軸與一曲柄臂相連結，因而 對使用者形成單-「曲柄-軸」組件。在市場上有兩種型式的 整合軸’-些與傳動側的曲柄結為一體而一些則是與相反側 的曲柄臂結為一體。 對所有滑動軸，軸的軸向固定是由罩在你好^料 袭7-，減7漏Μ曲柄臂間之距離決定。假設每個為 車:部分的底部托架通常並非為非常精確的部件，軸的定位 通常是不確定的，而有兩種方法被用來解決： 200804130200804130 IX. Description of the invention: [Technical field to which the invention pertains] The present invention is mainly applied to bicycles, which affect the bottom bracket shaft of the bicycle and its support base, and the reliability of the stalker's power transmission component. ~歹, for light weight and increased self-name [previous technology] Once the two long-lasting revolutionary processes have taken place in the bicycle industry for a long time, the weight of the components = and s ' as long as these changes will not affect the robustness and reliability, logically Performance is often improved by reducing the y force requirement or providing the knight to increase speed. Specifically, the crank arm is generally generally used in the form of aluminum (U.S. Patent No. 6,755,095, U.S. Patent No. 6,162, No. 3, U.S. Patent No. 65', 〇〇8, 美国, U.S. Patent No. 6,314,834, U.S. Patent No. Hollow elements made by 6227070, European Patent No. 1 120336 and U.S. Patent No. 5988016, and carbon fiber crank arms are usually filled with aluminum and foam fillings (U.S. Patent No. 7,013,753, U.S. Patent No. g § gg 4 〇 2, European Patent No. 15 71 〇7 5 遽) 'High cost and usually less reliable but can be as light as hollow aluminum components, but may also be special because it contains space technology or is only popular Appeal. In any case, it can be said that the components made by hollow forging require more technical investment, only related to a very large series of manufacturing, and those made of carbon are usually related to higher technology and smaller output. The market has been opened to more producers, although there are of course examples of the use of complex high-tech applications in the bicycle industry. 200804130 With regard to the bottom bracket, external bearings have been widely used in recent years (US Pat. No. 6,755,095, German Patent No. 19,751,879) to position the bearing shell or the bottom bracket cup (BB Cup) in the bicycle section that constitutes the bracket. External: 14 has been cut for it, salty may be too large, less need and more separation, support shaft = elastic motion (four) bearing * proof; and allow the use of larger radius shaft (usually f hollow and extremely light) 'because For the torsion resistance and σ, the larger the diameter, the lower the shaft section (and therefore the smaller the shaft weight). The pedal construction using an external bearing is usually combined with the use of a sliding shaft (U.S. Patent No. 6,755,095 ', U.S. Patent No. 2,5,113, No. 4), which is said to be in the axial movement without limitation. In the middle is the crank arm of the support. Since this (four) sliding shaft, if it is mounted on a bicycle, they will be assembled in separate housings to make them easy to install and service. Since the shaft is always accessible via one side 'usually made into an "integrated spindle", whereby the shaft is coupled to a crank arm, a single-"crank-shaft" assembly is formed for the user. There are two types of integrated shafts on the market's that are integral with the crank joints on the drive side and some that are integral with the crank arms on the opposite side. For all sliding shafts, the axial fixation of the shaft is determined by the distance between the cover and the arm of the crankshaft. Assuming each car is: the bottom bracket of the part is usually not a very precise part, the positioning of the shaft is usually uncertain, and there are two ways to solve it: 200804130
1.曲柄臂間距離可變：藉由使用未結合曲柄臂的滑錯來解決 =轴的自由端為一產生傳動介面的圓柱，允許曲柄臂盘 =曲柄臂以取得軸向定位的螺固元件換位，且該曲柄臂 具有表面有槽溝的開口，以***有間隙的轴，之後使用封 閉槽溝的（美國專利第6755095 )螺固元件固定到軸上完 成徑向固定，並固定軸向位置。 ^ 2 ·曲柄臂間距離固定··名1矣έ士人 ,、 右未、、、口 a曲柄潫具有一固定錨與抵靠 形成軸本身或僅為錐狀錯的播止部之推桿固定在一起。者 曲柄組間的距離不能改變，補整該不確定性的方法為使^ 〇形環、橡膠塾圈及波浪狀墊圈（做為彈箬）。1. The distance between the crank arms is variable: by using the slip of the unjoined crank arm. The free end of the shaft is a cylinder that produces the transmission interface, allowing the crank arm = crank arm to obtain the axially positioned screw element. Transposition, and the crank arm has an opening with a groove on the surface to insert a shaft with a gap, and then a fixed groove (U.S. Patent No. 6,755,095) is fixed to the shaft to fix the radial direction and fix the axial direction. position. ^ 2 · The distance between the crank arms is fixed. · The name 1 gentleman, the right, the right, the crank a has a fixed anchor and a push rod that abuts the shaft itself or is only a cone-shaped broadcast. Fixed together. The distance between the crank sets cannot be changed. The method of correcting the uncertainty is to make the ring, the rubber ring and the wavy washer (as a magazine).
首項選擇為最機械性邏輯且有效的解決方式，但如同在 大部分碳纖維曲柄組可見的，有些曲柄組之構造阻止了開口 :此外，市場中亦可見使用螺固元件使曲柄臂夾持軸（_ 该槽溝）而考慮到超重的重量將我們帶往第二項選擇。因此， 該彈性元件—般是做為吸收所述軸向不確定性，但有時卻創 ，出關於軸承軸向力或預負荷（Preload)力新的不雄定性， 這可能為限制軸承壽命的關鍵因素。 、有一個選擇應被提及：Shimano製造商，其高級登山車 式樣XTR# 2003版為登山車夾持曲柄組（一般已使用在_ 曲柄組中）的先驅者’現在已宣佈其圓年款除去所爽持的 曲柄臂以減輕重量’但這種藉使用具溝槽的螺帽與安全螺絲 來解決所述不確定性的情形與美國專利公開號第2刪⑼州 200804130 说苐四圖的槽環類似。 最近，支撐具整合軸的曲柄組之ββ杯體及軸承也應該被 提及。一般而言，外部軸承系統提供一系列已被提出的顯著 改f，然而由許多底部托架引起的不精確性大大限制了軸承 的竒中亦即，除了軸向長度的不確定性外，還有管段或底 部托架兩侧間平行（―旦將其鎖緊便能支撐杯體），以及對齊 Ϊ側螺紋料確定性。額㈣不確定性都比錢的不確定性 =糟’―旦軸由沒對齊的軸承支標，不只會影響軸承的使用 奇命及動力傳動的效率，也增加了摩擦。 【發明内容】 下文為前述元件之改良，特別是曲柄臂的構造 錯固以及軸的型式，和在自行車上的組裝。 關於曲柄臂，發明人在此提出一種金屬曲柄臂，優選 ::製：度抗牽引及金屬疲勞’以成為量輕及經濟 ^ 柄臂的頂端（曲柄臂相應於踏板之相反端）且 二沿著臂的長度延伸的洞以形成―中空曲柄。$了=圍 …同開：的作用力’曲柄臂的頂端將具有突部或額外材料 :此孩犬部會成為垂直於曲柄臂的補強環，能在 軸 臂頂端與轴交接處時所產生的=一达踩踏曲: 既然曲柄臂具有補強環，便可不使用利用鎖腎描” 200804130 轴向固疋的滑錯被認為相當便利，在此所提出的是放棄「整 〇軸」、、Ό 〇其中一個曲柄組的概念，而以「半整合軸」的概 ^ ^ („ buu„ anch〇r、 或錐形端而可移除’另一曲柄臂則為軸組體的一部分，但與 /月！田、、且口以允許改變曲柄臂間的最後距離，因此允許消除曲 柄組間的間隙亚允許軸承轴向預負荷（町1⑽d)的規律性。 因此將不對稱地製造軸且軸的端部將與滑動曲柄臂結合 因為=而使用者組裝或拆卸，故該曲柄臂優選為在製造廠 、、且波。&種方法可在強A力量下組裝，使用像是因溫度增加 而膨脹的曲柄組組體或使用高殘留阻值（residual resisj:anc)的厭氧保持（anaer〇bic 加^^)液。 、—最後，詩底部托架杯體與軸承，在此提㈣解決方法 為母個杯體配備有半球形凹穴以安置輪流支樓軸承的球形環 口亥料軸承支撐件將具有—柱形内表面並依軸承調整， 而外表面為球形，允許軸承依任何方向迴轉㈤⑽。該系 允許軸承永遠凡美地對齊軸，不論受限於自行車車架底部 托架管不規律性的BB杯體間的定位如何。一但麵^ 上曲柄組同樣的預負荷將保證每個球形環的定位。 【實施方式】 本發明所提出之結構事實上為總合各種作用於自行車之 曲柄組及底部托架的不同機械性解答。 BB軸（底部托架軸）⑶的左端為形成槽溝之柱體⑽， 9 200804130 不在防止相應曲柄臂⑴於兩方向滑動的準確範圍，稍後將依 底部耗架管⑻的實際尺寸調整以防止可能的軸向空間及轴 ，上過多的軸向負荷 '然而，其右端之鎖止系統則不具相同 程度之自由，在這種情形中為了在相應曲柄臂(2)拆卸及組裝 的操作中減少磨損’該右端是為錐形體⑽，或至少為财 的表面（就像許多柱狀鑄模一樣）。 對左曲柄臂及軸間的軸向調整以允許改變曲柄臂間的最 2離’我們提出使用—種雙螺紋栓⑻，其可定義為具有— …、’文主體及螺紋頂部’主體螺紋⑻）的螺距較頂部螺紋（82) 。特収在第四圖中，主體螺紋之螺距為15_而 ^累、、文螺土距為〇.5mm，依此每向栓⑻的左邊旋轉兩圈轴 將位移遠離曲柄臂⑴2_，而栓⑻依相反方向位移i咖。 端同方向旋轉，栓由外側進人轴及曲柄，因為頂 碥長度較短’其直徑較主體明顯大比較方便。 、 上述曲柄組及軸為「半整合」軸結構。亦即，一 的轴移除的曲柄臂，在這種情形中傳動側的曲柄臂 _ 的曲柄臂⑴將顯示為與軸相接合但具有使用該 :不必：甚8)的可調式推進鎖。依此可以調節曲柄臂間的距離 退化的的曲柄臂，之連結並避免在組裝與拆卸時 $強曲柄f α、2)，我們提岐用來自®形擠壓棒材的 问強度銘合金’因其晶粒方向而具有出色的機械性f 200804130The first option is the most mechanically logical and effective solution, but as seen in most carbon fiber cranksets, some crankset constructions prevent the opening: in addition, the use of screwing elements to clamp the crank arm is also seen in the market. (_ the groove) and taking into account the weight of the overweight takes us to the second option. Therefore, the elastic element is generally used to absorb the axial uncertainty, but sometimes it creates a new non-ambiguity about the axial force of the bearing or the preload force, which may limit the bearing life. The key factor. One option should be mentioned: Shimano manufacturer, whose advanced mountain bike model XTR# 2003 version is the pioneer of the mountain bike clamping crank group (usually used in the _ crank group), has now announced its annual Removing the gripping crank arm to reduce the weight', but using the grooved nut and the safety screw to solve the uncertainty is described in US Patent Publication No. 2 (9) State 200804130. The groove ring is similar. Recently, ββ cups and bearings supporting a crank group with integrated shafts should also be mentioned. In general, external bearing systems offer a number of significant improvements that have been proposed, however, the inaccuracies caused by many bottom brackets greatly limit the rim of the bearing, in addition to the uncertainty of the axial length. There is a parallel relationship between the sides of the pipe section or the bottom bracket (the cup can be supported by locking it) and the determinate of the side thread is aligned. Uncertainty (4) Uncertainty is more than the uncertainty of money = bad - the axis is not aligned with the bearing, not only affects the use of bearings, the efficiency of the power and power transmission, but also increases the friction. SUMMARY OF THE INVENTION The following are improvements to the aforementioned components, particularly the construction of the crank arms, the type of the shaft, and the assembly on the bicycle. With regard to the crank arm, the inventors here propose a metal crank arm, preferably:: a degree of resistance to traction and metal fatigue 'to become lightweight and economical ^ the top end of the handle arm (the crank arm corresponds to the opposite end of the pedal) and two along The length of the arm extends through the hole to form a "hollow crank." $了=围...同开:的力' The top end of the crank arm will have a protrusion or additional material: the child's dog will become a reinforcing ring perpendicular to the crank arm, which can be produced when the top end of the arm is at the intersection with the shaft =1 Treads: Since the crank arm has a reinforcing ring, it can be used without the use of lock kidney. 200804130 The axial slip is considered to be quite convenient. The proposal here is to abandon the "whole axis", Ό 〇 One of the concepts of the crank group, and the "semi-integrated axis" is ^ ^ („ buu„ anch〇r, or the tapered end can be removed'. The other crank arm is part of the shaft group, but with / month! The field, and the mouth to allow the change of the final distance between the crank arms, thus allowing the elimination of the gap between the crank sets, allowing the axial preload of the bearing (chore 1 (10) d) regularity. Therefore, the shaft and the shaft will be manufactured asymmetrically. The end will be combined with the sliding crank arm because the user assembles or disassembles, so the crank arm is preferably at the manufacturer, and the wave. & method can be assembled under strong A force, the use is like temperature increase Expanded crank group or use high residue Value (residual resisj: anc) anaerobic maintenance (anaer〇bic plus ^^) liquid. - Finally, the poem bottom bracket cup and bearing, here (4) solution for the mother cup is equipped with a hemispherical concave The spherical ring ring bearing support for the bearing of the rotating branch bearing will have a cylindrical inner surface and be adjusted according to the bearing, while the outer surface is spherical, allowing the bearing to rotate in any direction (5) (10). The system allows the bearing to always be beautiful. The alignment axis, regardless of the positioning between the BB cups that are limited by the irregularity of the bracket tube at the bottom of the bicycle frame, the same preload of the upper crank group will ensure the positioning of each spherical ring. The structure proposed by the present invention is in fact a combination of various mechanical solutions for the crank set and the bottom bracket of the bicycle. The left end of the BB shaft (bottom bracket shaft) (3) is a cylinder (10) forming a groove, 9 200804130 Rather than preventing the exact range of sliding of the corresponding crank arm (1) in both directions, the actual size of the bottom consumable tube (8) will be adjusted later to prevent possible axial space and shaft, excessive axial load on the 'but, however, right The locking system does not have the same degree of freedom, in which case the wear is reduced in the operation of the disassembly and assembly of the corresponding crank arm (2). The right end is a cone (10), or at least a wealthy surface (like Many cylindrical molds are the same.) The axial adjustment between the left crank arm and the shaft allows the change of the most two between the crank arms. We propose to use a double threaded bolt (8), which can be defined as having a ... And the thread top 'body thread (8)) has a larger pitch than the top thread (82). In the fourth picture, the pitch of the main thread is 15_ and ^, and the distance between the snails is 〇.5mm. According to the rotation of the left side of each bolt (8), the axis is displaced away from the crank arm (1)2_, and the bolt (8) Displace the i coffee in the opposite direction. The end rotates in the same direction, and the plug enters the human shaft and the crank from the outside, because the length of the top cymbal is shorter, and its diameter is significantly larger than that of the main body. The crank group and the shaft are "semi-integrated" shaft structures. That is, a crank arm with a shaft removed, in this case the crank arm (1) of the crank arm _ on the transmission side will be shown to engage the shaft but with an adjustable push lock that uses: no: 8). According to this, the crank arm whose distance between the crank arms is degraded can be adjusted, and the connection and avoiding the strong crank f α, 2) during assembly and disassembly, we use the strength of the alloy from the TM-shaped extruded bar. Excellent mechanical properties due to its grain orientation f 200804130
(mechanical property)。該棒材 H 得預成型物㈤’周圍外形為曲柄：的::::工=以取 亚—从入除 貝將此洞覆盍整體。因為敕骑此 千仃於金屬晶粒的方向，對準擠 〜、正體仍 屬的有利性質。該預成型物在其鑽孔端 7原孟 製成時形成一環（11、21)，A „ 、 大邛，在洞被 基本形式為直㈣柄組為此開D的實f補強物，故而其 之後藉由銑削（mill i收）趟 〇、2)其最終型式。g)機械加工製造以取得曲柄臂 在洞（10)的開口我們提出提供 杯 除A 了敕、、切；《 , A w奴仏允许肷入插塞（6)的螺紋， 曲:、“、觀做為堵塞洞外’亦可做為加強鎖止軸(3) 曲柄臂⑴-栓⑻或軸⑶—曲柄臂⑵_栓⑼。 軸⑻― 傳動側的曲柄臂⑵之情形為具有一機器 成齒輪（222)外形以結合負責為 人 〕凹處形 貝貝為鏈缸結合傳動鏈環的相應星 齡）m)，且亦具有星形輪鎖帽（23)所必要的螺 亥齒輪外形將只影響曲柄臂⑺的橫向面， 柃 所跨設的洞。 曰卞擾 我們亦提出使用雙螺㈣絲來架設傳動側曲柄，更 ^維持與相反側曲柄臂的對稱，_這也允許節省—些重 =嫂提供ΐ精巧的操縱及更好的堅固性以防止栓因減少的組 :。距而鬆掉。在設計中，拴主體的螺距為lmm而頂部螺距 〇. 5mm軸及曲柄臂之間每〇. 5mm的旋轉提供推進。 200804130 一敕曲柄^ 撐組體包含有轴承，我們提出可與目前 的外部轴承系統，但具有每個Μ⑽μ 中 =Γ:具球形外表面的傳輸環(42)上及於仙杯體⑹ 中同樣為球形的凹洞之指故、丄 Μ “ 這將允料論受底部托架管（0) 卿、41，)相對位置如何 中的二 =ΓΓ 一旦它們對齊了，曲柄組架設在轴承 勺相同預負何會確保每個傳輸球狀環之定位。 甚他 上述母個解決方案分_有效用是 在碳纖維曲柄（J:到現在仂雔杜 号厂疋使用丰正合軸 中可以A非… 柄臂間距離固定）的情形 了 乂為非吊有效的解決方式；在曲柄頂端具 鑽孔曲柄組本身在節省重蚩方3 、八 衣、中二 動斟威aa_l 方面疋一種簡單的解決方式，·自 ς雔謂對市％上具外部軸承的任何曲柄組都 十三= 文:^的安全裝置，可以用安全螺絲_ 做為閉。安全螺絲可以置於頂部的不同角产在H王到位時 的可能的嵌孔與九個突肋(職二^ ± ^ 、瓜孔及/、中一個槽溝然後做為鎖的功能而非π 4Τ 本解決方式，即使是在不f 巧。依 住何型式的滑動轴-曲柄臂錯可以為理想的體解;方^累紋检對 其他闕於本發明的曲柄臂亦同樣如上所述藉由鑽孔製成 12 200804130 中空的曲柄，桿臂由樹脂及碳纖維套筒所覆蓋，最後為中空 铭曲柄組，具有合成材料製成之襯套。 200804130 【圖式簡單說明】 第-圖為本發料述㈣在組成底料 -部之曲柄組及底部托架總成之/丁車架 第二圖為自自行車移除的前組體，其 θ >分離而相反側則仍與軸相連肖動側曲柄與軸 第三圖為***連結第二圖中曲柄臂組 未結合部件 月勤接碩中之 第四圖A、Β為兩不同設定位置中 第五圖為非傳動側曲柄之平面广動接碩之剖面圖 第六圖==機械加工製造曲柄臂之兩基本步驟： 第七圖=細=的三個未組裝部件:曲柄臂、 生开/輪（spider)及螺帽 ==柄臂之底視圖，顯示星形輪傳動交接面外觀 ί = ;β杯體及其相應球狀環轴承支撐件與軸承 十圖:底部托架支撐組體剖面圖，顯示兩相向ββ杯體 略不對齊而軸承仍維持對齊 第十一圖為第一圖中組體之截面圖，並顯示相應於第十 —圖剖面之剖面線 =十-圖為前組體根據該剖面線之剖面圖 十三圖為結合安全鎖之轴-曲柄臂裝配栓 200804130 【主要元件符號說明】 〔本創作〕 (〇)底部托架管 (la)預成型物 ⑴、21)環 (22) 星形輪 (23) 輪鎖帽 (38)柱體 (42)傳輸環 (43、43’）轴承 (8 、 9)栓 (83)主體螺紋 (1、2)曲柄臂 (10)洞 (18)突肋 (222)齒輪 (3)軸 (39)錐形體 (41、41’）杯體 (6)插塞 (82)頂部螺紋 (88)安全螺絲(mechanical property). The bar H has a preform (five) around the shape of the crank: :::: work = to take the sub------------ Because the rider is riding in the direction of the metal grain, it is advantageous to align the compact and the normal body. The preform forms a ring (11, 21) when its bore end 7 is made of Meng, A „ , 邛 , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , It is then milled (milled), 2) its final version. g) machined to obtain the crank arm at the opening of the hole (10). We propose to provide the cup in addition to A, 切, cut; ", A w slaves allow the thread of the plug (6) to be inserted, the curve: ", the view as a plugging hole" can also be used as a reinforcing lock shaft (3) crank arm (1) - bolt (8) or shaft (3) - crank arm (2) _ tying (9). The shaft (8) - the crank arm (2) on the transmission side is in the form of a machine-shaped gear (222) to combine the corresponding star age of the chain-cylinder combined with the transmission chain ring) m), and also has The shape of the helical gear that is necessary for the star wheel lock cap (23) will only affect the lateral faces of the crank arms (7) and the holes that are spanned.曰卞 我们 We also propose to use the double screw (four) wire to erect the drive side crank, and to maintain the symmetry with the opposite side crank arm, which also allows for saving - some weight = 嫂 provide ΐ fine handling and better robustness Groups that prevent thrombus reduction: Loose off. In the design, the main body has a pitch of lmm and a top pitch of 〇. 5mm shaft and each arm between the crank arms. 5mm of rotation provides propulsion. 200804130 A crankcase consists of bearings, which we propose can be used with current external bearing systems, but with each Μ (10) μ Γ = Γ: a spherical outer surface of the transmission ring (42) and the same as the fairy cup (6) For the purpose of the spherical cavity, 丄Μ "This will allow the material to be affected by the bottom bracket tube (0) qing, 41,) the relative position of the two = ΓΓ Once they are aligned, the crank set is erected in the same bearing spoon Pre-reduction will ensure the positioning of each transmission spherical ring. Even the above-mentioned parent solution is divided into _ effective use in the carbon fiber crank (J: to the present 仂雔 Du 疋 factory use Fengzheng axis can be A non... The case where the distance between the shanks and the arms is fixed) is an effective solution for the non-hanging; the drilling of the crank group at the top of the crank itself is a simple solution to save the weight of the side 3, the eight clothes, the middle two movements and the aa_l. ,······························································································ Possible perforations and nine ribs when in place ( Job 2 ^ ± ^, melon hole and /, a groove in the middle and then as a lock function instead of π 4 Τ this solution, even if it is not smart. Depending on the type of sliding axis - crank arm error can be ideal The body of the crank; the other side of the crank arm of the present invention is also made by drilling 12 200804130 hollow crank, the arm is covered by resin and carbon fiber sleeve, and finally the hollow Crank set, with bush made of synthetic material. 200804130 [Simple description of the drawing] The first picture shows the material (4) in the bottom part of the crank part and the bottom bracket assembly / the second frame The picture shows the front group removed from the bicycle, the θ > separated and the opposite side is still connected to the shaft. The crank and the shaft are the third. The third picture is the inserted link. The second part of the crank arm group is not combined with the components. In the fourth picture A, Β is the two different setting positions, the fifth picture is the non-transmission side crank plane, the wide-motion connection, the cross-sectional view, the sixth figure == two basic steps of machining the crank arm: seventh picture = Fine = three unassembled parts: crank arm, spar / spider and nut == Bottom view of the arm, showing the appearance of the star wheel drive interface ί = ; β cup and its corresponding spherical ring bearing support and bearing ten figure: bottom bracket support group profile, showing two opposite phase ββ cup slightly Alignment while the bearing remains aligned. Figure 11 is a cross-sectional view of the group in the first figure, and shows the section line corresponding to the tenth-graph section = ten-graph is the section of the front group according to the section line. The picture shows the shaft-crank arm assembly bolt 200804130 combined with the safety lock. [Main component symbol description] [This creation] (〇) bottom bracket tube (la) preform (1), 21) ring (22) star wheel (23) Wheel lock cap (38) cylinder (42) transmission ring (43, 43') bearing (8, 9) bolt (83) body thread (1, 2) crank arm (10) hole (18) projecting rib (222) Gear (3) shaft (39) cone (41, 41') cup body (6) plug (82) top thread (88) safety screw
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