五、發明說明（I ) 料明係一種自行車中空曲柄減重 涉及於腳踏車的技術領域，尤指本發明針對製成中*狀: 柄的製法，可使曲柄重量更輕、強度佳。 二 自行車心踩踏_騎行的元件即為曲柄 ㈣置更輕，讓踩踏更輕便，並且降低材料成本，因此技 T上不斷朝向輕量化研發，比如_專利案，其係公告於八 I七年九月十一曰’公告號為三四〇-〇三號「自行車用 ^及其製造方法」，其技術内容係使曲柄製成中空狀， 杆空狀之製法’是在於設一由發泡性火山玻璃燒成的中空 心’芯内填充有火山玻料砂狀填料，充填之後於端口加 壓封口’再將金屬錠予以熔融成融液後，而芯置於模具中 進行普通纽的輯法，即令融H主於模具内包圍於芯 周側，藉以鑄造成曲柄轉，因採以鑄造法所以在曲柄链 料内部的金屬組織中產生孔隙，再置入模具中進行型鍛造 加工’-方面成型，另方面係均質曲柄坯料之表面，最 後，以穿孔器穿開曲柄坯料的一並取出砂狀填料，即為形 成了曲柄半成品，之後再進行曲柄的後續加工流程。 前專利案確實提供中空曲柄的效果，惟，在製法上仍 有部份缺憾存在： t 1 ·由於曲柄坯料的成型係先採取鑄造，因此必須熔 融金屬成融液，而金屬在熔融之時便有破壞其物理性質以 及機械強度，所以當製成曲柄以後，不能作表面陽極化處 理，以致曲柄的美觀性不足，無法變化之外，也無法有效 提昇曲柄的防鏽能力，降低使用壽命。 500679V. Description of the invention (I) The material is a kind of bicycle hollow crank for weight reduction. It relates to the technical field of bicycles, especially the invention is directed to the method of making a hollow shape: the handle, which can make the crank lighter and stronger. Two bicycle heart pedaling _ riding components are lighter crank set, making pedaling lighter, and reducing material costs, so the technology T is constantly moving towards lightweight research and development, such as the patent case, which was announced in August 1987 On the eleventh day of the month, 'Announcement No. 340-03 "Bikes for Bicycles and Manufacturing Method", the technical content of which is to make the crank into a hollow shape, and the method of making the rod hollow shape is to provide a foaming property The volcanic glass fired hollow core is filled with volcanic frit sand-like filler. After filling, the port is pressurized and sealed. Then the metal ingot is melted into a melt, and the core is placed in a mold for ordinary buttons. That is, the melt H is mainly enclosed in the core on the side of the core, so that it is cast into a crank, and because of the casting method, pores are generated in the metal structure inside the crank chain, and then it is placed in the mold for mold forging processing. Molding, on the other hand, is the surface of the homogeneous crank blank. Finally, the punched material is used to open the crank blank and the sand-like filler is taken out to form a crank semi-finished product, and then the subsequent processing of the crank is performed. The former patent case does provide the effect of a hollow crank, but there are still some shortcomings in the manufacturing method: t 1 · Because the molding of the crank blank is first cast, the molten metal must be melted into a molten liquid, and the metal is melted when it is melted. There is damage to its physical properties and mechanical strength, so when the crank is made, the surface cannot be anodized, so that the aesthetics of the crank is insufficient, it cannot be changed, and it cannot effectively improve the rust prevention ability of the crank and reduce its service life. 500679
消 2 ·承前第1項所述，由於採取鑄造方法，在銘 炼融之時便被破壞了機械強度，加上芯與曲柄坯料的材餅 物性完全不同，連接效果不夠穩固，所以降低了曲柄的二 度。 3 ·成本高且芯多佔據曲柄内的空間；由於須先製造 芯，而且要必須詳為選出材質物性能耐高熱的材料來製1 芯，所以製造成本高，並且另製造怒，也因此增加曲柄= 部的空間，使得金屬的壁厚有限，加上前 同材質物性，讓強度更有弱化之問題。 屬一係不 緣是，本發明人一本鑽研發明的精神，著手研究開 發，本著多年專業經驗與心得，悉心試驗，推陳出新，進 而提出本發明，以期改善習知之缺弊。 本發明之主要目的係為提供一種自行車中空曲柄減 之製造方法，主要係本發明免除以往另設一芯的作法， 由圓棒的棒材引伸擠鍛成型加工，以於内形成一開槽注 填充液，再塞設蓋體而封閉，再將整個進行鍛壓成型、 出填充液、切斷蓋體即可，本發明提供了一體鍛造擠伸 咼強度、重里再減重的功效，並且本發明可以在曲柄進行 表面極處理’增長曲柄的使用壽命。 為使貴審查委員能進一步瞭解本發明之特徵、製法 流程及達成之突破性功效，茲以下文所述較佳實施例配合 圖式详細說明如后： (一）圖式部份： 第一圖係本發明之流程示意圖。 重 逕 入 取 的 ;--------1---1.一！ (請先閱讀背面之注意事項寫本頁) 本紙張尺度適用令國國家標準（CNS)A4規格（210 X 297公爱 500679 A7 B7 五、發明說明（$ ) 第二圖係本發明之初步成形立體示意圖。 第三圖係本發明之填入填充液之立體示意圖。 第四圖係本發明之鍛壓成型之平面示意圖。 第五圖係本發明之鑽孔流程之平面示意圖。 第六圖係本發明之完成曲柄半成品之平面示意圖 (二）圖號部份： u (1 0)棒材 (2 0)初胚 (2 3 )内螺紋 (2 5 1 )卡溝 (3 0 )填充液 (4 0 )鍛壓模具 (4 2)下模具 (5 0)成型胚 (6 0 )曲柄半成品 本發明係關於-種自行車中空曲柄減重 本發明之製法流程如下： m a ·選取棒材•如第一、—圖 棒材（1〇); -圖’選取圓棒規格的铭質 丨b:初步成型：如第一、二圖’將棒材（10)配合 引伸擠鍛成型的加工方式，將棒材f 形狀的初胚（2〇)，並且初胚2( 擠鍛成為長圓 槽狀之開槽（21) ; C2〇)在-端形成-深 注入填充液：如第 (2 1 )開槽 (2 5 )蓋體 項 t (4 1 )上模具 訂 (5 漏孔 c ® ’先在開槽（2 1 ) 本紙張尺度適时關家標準（CNS)A4規格（210 X 297公釐"7 、發明說明（^) 的開口内側壁加工出内螺紋（23)，以由開 内灌入流體的填充液（30)，比如水或油等等； d·基設蓋體：如第一、 蓋體（25)，蓋體（25):二：工一無頭螺栓狀之 驅動之卡溝（Μ η 有—供工具欲入 ，利用工具驅動卡溝（2 5 1 )， =盍體（25)螺設於開槽（21)内螺紋（23)而封 閉，避免填充液（3 〇 )流出； e :鍛壓成型：如第一、卞门 c 0 η λ 、五圖，將已填入填充液 ”〇)之初胚（20)置於鍛壓模具（4〇)的上下 :二4/) (42)之間’鍛壓模具（40)係設為對應 /外形輪廓的形態’因此蓋體（4 0 )也隨之拉長變 形’使初胚（2 0)經此鍛壓成型為成型胚（5 〇 ); L取出填充液：如第一、五圖，成型胚（5〇) 一 侧利用穿孔之工且設備禮讯一 f " ”又爾鑽5又小小的漏孔（5 1 )，讓内 部的填充液（30)流出，使成型胚（5〇)内的開槽 塞二1r 成中空狀其次’因為成型胚（5 0 )在螺設 盖體（2 5)之末端仍有足夠之材料厚度，因此再以切斷 2方式，將蓋體（25)部份予以裁斷去除，便形成如 第六圖的曲柄半成品（6〇)。 經上說明，本發明之製法提供了下列之優點： 1由於本發明之曲柄係以棒材進行引伸播鍛加工成 型，所以-體锻造延伸的加工，不但不會破壞機械強度， 更能利用鍛造製法，重整金屬材料的結晶方向使更單純 化，保有IS合金材質封狀組織流線，材㈣㈣ 500679 A7 B7Consumer 2 · As mentioned in item 1 above, due to the casting method, the mechanical strength is destroyed during smelting and melting. In addition, the material properties of the core and the crank blank are completely different, and the connection effect is not stable enough, so the crank is reduced. Second degree. 3 · High cost and the core takes up much space in the crank; because the core must be manufactured first, and the material must be made of a material with high heat resistance to make a core, the manufacturing cost is high, and the anger is added, so the crank is also added The space of the part makes the wall thickness of the metal limited, and the physical properties of the same material as before make the strength weaker. The reason is that the inventor studied the spirit of the invention, started research and development, based on many years of professional experience and knowledge, carefully tested and innovated, and then came up with the present invention, in order to improve the shortcomings of knowledge. The main purpose of the present invention is to provide a method for manufacturing a hollow crank of a bicycle. The present invention mainly eliminates the method of providing another core in the past, and the extrusion and forging process is performed from the rod of a round rod to form a slotted injection. The filling liquid is closed with a cover body, and then the entire body can be forged and formed, the filling liquid can be cut, and the cover body can be cut. The present invention provides the effect of integral forging extrusion strength, weight reduction, and weight reduction. Surface treatment can be applied to the crank to increase the life of the crank. In order to allow your reviewers to further understand the features of the present invention, the manufacturing process and the breakthrough effects achieved, the preferred embodiments described below are described in detail with the drawings as follows: (1) Schematic part: First The diagram is a schematic flow chart of the present invention. Re-entering and taking; -------- 1 --- 1. One! (Please read the notes on the back first to write this page) The paper size is applicable to the national standard (CNS) A4 specification (210 X 297 Public Love 500679 A7 B7 V. Description of the invention ($) The second figure is the initial formation of the invention Three-dimensional diagram. The third diagram is the three-dimensional diagram of the filling liquid of the present invention. The fourth diagram is the planar diagram of the forging and pressing process of the present invention. The fifth diagram is the plane schematic diagram of the drilling process of the present invention. The sixth diagram is the present diagram. Plane schematic diagram of the semi-finished product of the completed crank (II) Part of drawing number: u (1 0) bar (20) primary embryo (2 3) internal thread (2 5 1) card groove (3 0) filling liquid (4 0) Forging die (4 2) Lower die (50) Molded embryo (60) Crank semi-finished product The present invention relates to a kind of bicycle hollow crank to reduce weight. The manufacturing method of the present invention is as follows: ma —Picture bar material (10); -Picture 'Select the quality of round rod specifications 丨 b: preliminary molding: as in the first and second picture', the method of combining the bar material (10) with the extrusion extrusion forging process, f-shaped preforms (20), and preforms 2 (squeezed (21) extruded into oblong grooves; C2〇) at- Formation-deep injection of filling liquid: as in (2 1) slotted (2 5) cover body item t (4 1), mold order (5 leak hole c ® 'slotted first (2 1)) The paper size is timely Guan Jia Standard (CNS) A4 specification (210 X 297 mm " 7, the inside wall of the opening of the invention description (^) is machined with internal threads (23) to fill the fluid with a filling liquid (30), such as Water or oil, etc .; d. Basic cover: such as the first, cover (25), cover (25): two: work-headless bolt-shaped drive groove (M η Yes-for tools Into, use a tool to drive the groove (2 5 1), = the carcass (25) is screwed in the slot (21) internal thread (23) and closed to prevent the filling liquid (30) from flowing out; e: forging molding: such as First, the cardia c 0 η λ and the fifth figure, the original embryo (20) filled with the filling liquid "〇) is placed above and below the forging die (40): two 4 /) (42) 'forging The mold (40) is set to correspond to the shape of the contour 'so the cover body (40) is also elongated and deformed' so that the primary embryo (20) is formed into a molded embryo (50) by this forging; L is taken out and filled Liquid: as shown in the first and fifth figures, the shaped embryo (50) side Using the perforation technique and the equipment li xun yi "drill 5 small holes (5 1), let the inner filling liquid (30) flow out, so that the slotted plug in the molding embryo (50) 2 1r is hollow Secondly, because the forming embryo (50) still has sufficient material thickness at the end of the screw cover (25), the cover (25) part is cut by cutting 2 After removal, a crank semi-finished product (60) as shown in FIG. 6 is formed. According to the above description, the manufacturing method of the present invention provides the following advantages: 1 Because the crank of the present invention is extruded and forged by using a bar material, the process of -body forging and extension will not only damage the mechanical strength, but also can use forging. Production method, reforming the crystallization direction of the metal material to make it more simplistic, and keeping the sealed structure streamline of the IS alloy material, wood material 500679 A7 B7
五、發明說明（工I 2 ·承前所述，由於曲柄均為鍛造成型，所以可以在 表面施以陽極處理’增加表面處理的選擇性， 使用壽命。 胃長曲柄的 3·本發明係直接讓棒材成型為内部有開槽的形式， 所以開槽逕供填充液容裝，無須如同習知尚須另設芯的製 法，是故製法流程單純許多，並且減輕了習知芯的重量， 讓曲柄的重量更輕。 i 項 4 ·本發明係在兼備強度佳、壽命長的狀況下，猶能 以最低的材料成本、&費最少材料便製成更輕量化的曲 柄，深具實用性與突破性。 綜上所述，本發明確係一極具突破性的發明佳作， 由於新穎的製法，完全突破習知之缺弊，無疑是—具高度 創作性之佳作，符合產業利用性，應符發明專利申請要 件，爰依法提出申請。 線 3"氏張尺度i中國國 x 297公釐）V. Description of the invention (Industrial I 2 · As mentioned earlier, because the cranks are forged, they can be anodized on the surface to increase the selectivity of surface treatment and the service life. 3. The invention of the long crank of the stomach The bar is formed into a slot with an internal slot, so the slot diameter is used for the filling liquid. There is no need to set up a core as in the conventional method. The traditional method has a much simpler process and reduces the weight of the conventional core. The weight of the crank is lighter. Item 4 · The present invention is able to make a lighter weight crank with the lowest material cost and the least material under the conditions of good strength and long life, which is highly practical. In summary, the present invention is indeed a groundbreaking invention masterpiece. Due to the novel manufacturing method, it completely breaks through the shortcomings of conventional knowledge. It is undoubtedly a highly creative masterpiece that conforms to industrial applicability. In accordance with the requirements of the invention patent application, the application was made according to law. Line 3's Zhang scale i China x 297 mm)