321625 A7 B7 五、發明説明卩) 本發明係關於自行車用曲柄軸，曲柄及曲柄組裝體， 特別是關於，安裝準確度及安裝強度很高，對輕置化有貢 獻之自行車用曲柄軸，曲柄及曲柄組裝體^ 自行車之曲柄與曲柄軸苳安裝構造，係將曲柄軸之兩 端部形成爲大致上呈四角柱狀，在曲柄設四角柱狀之孔， 而將雙方嵌合固定在一起》 傳統之曲柄與曲柄軸之嵌合構造之定芯準確度不很髙 ，而轉動方向之結合強度也不充分。特別是，爲了達成輕 量化而將i柄軸採鋁合金之空心管構造，或將曲柄採用鋁 合金之空心管狀時，其結合強度常嫌不足。 因此，本發明之目的在提供，安裝準確度及安裝強度 很高，對輕量化有貢獻之自行車用曲柄軸，曲柄及曲柄組 裝體。 爲了達成上述目的，本發明之自行車用曲柄軸備有， 位於曲柄軸之端部，在轉動方向結合曲柄之轉動結合部， 以及，至少位於上述轉動結合部之後方，將上述曲柄定芯 之定芯部。 經濟部中央梂準局員工消费合作杜印製 而上述曲柄軸之上述轉動結合部最好是鋸齒狀缺口（ Serration) ° 而且，上述曲柄軸可採用空心之管狀體。 同時，上述轉動結合部及上述定芯部可以採直徑在軸 方向沒有變化之筆直形狀，但採直徑在端部側變小之推拔 (Taper )形狀較佳。 本發明之自行車用曲柄，其安裝曲柄於曲柄軸之曲柄321625 A7 B7 V. Description of the invention (i) The present invention relates to a crankshaft for bicycles, cranks and crank assemblies, in particular to a crankshaft for bicycles and cranks that have high installation accuracy and installation strength and contribute to light weight And crank assembly ^ The installation structure of the crank of the bicycle and the crank shaft is to form the two ends of the crank shaft into a substantially rectangular column shape, and the rectangular column hole is provided in the crank, and the two sides are fitted and fixed together " The accuracy of the fixed structure of the traditional crank and crank shaft fitting structure is not very high, and the combination strength of the rotation direction is also insufficient. In particular, in order to achieve weight reduction, when the i-handle shaft is made of a hollow tube of aluminum alloy, or the crank is made of a hollow tube of aluminum alloy, the bonding strength is often insufficient. Therefore, an object of the present invention is to provide a crank shaft for a bicycle, a crank, and a crank assembly that have high mounting accuracy and mounting strength and contribute to weight reduction. In order to achieve the above object, the crank shaft for a bicycle of the present invention is provided with a rotation coupling portion which is located at an end of the crank shaft and which couples the crank in the direction of rotation, and which is located at least behind the rotation coupling portion and fixes the crank Core. The Ministry of Economic Affairs of the Central Bureau of Economic Cooperation and Consumer Cooperation du printing. The rotation joint of the crankshaft is preferably serrated. Moreover, the crankshaft can be a hollow tubular body. At the same time, the rotation coupling portion and the fixed core portion may adopt a straight shape whose diameter does not change in the axial direction, but it is preferable to adopt a taper shape in which the diameter becomes smaller at the end side. The crank for bicycles of the present invention is equipped with a crank on a crank of a crank shaft
(請先閱讀背面之注意事項再填寫本頁) 本紙張疋度逋用中國國家揉準（CNS ) A4規格（210X297公釐） 321625 A7 --------B7_ 五、發明説明自) 軸安裝部備有，將上述曲柄軸與曲柄定芯之定芯部，以及 ’將上述曲柄軸與上述曲柄在轉動方向定位固定之轉動結 合部。 而上述曲柄之上述結合部可採鋸齒狀缺口》 同時，上述轉動結合部及上述定芯部可採內徑在軸方 向沒有變化之筆直形狀，但採內徑在裏側變大之推拔形狀 較佳。 而且，上述曲柄軸或上述曲柄之上述鋸齒狀缺口之齒 數以8個較佳.。 本發明之自行車用曲柄組裝體，係在上述曲柄軸之兩 端部安裝上述曲柄者。 茲參照附圖說明本發明實施之形態如下。第1圖表示 本發明之曲柄1之正面圖。曲柄1用鋁合金製成，如第1 (請先閱讀背面之注意事項再填寫本頁) 經濟部中央標準局貝工消費合作社印製 曲使柄誌有近 柄，在 側可曲標成附 曲示。孔 裝，在之形 2 將所 5 裝 安化。商部部。有圖軸安 軸變小廠隅端小設 6 柄板 柄而大造角柄變，第曲踏 曲置定製面曲續 2 如在腳 , 位一示表之連部。裝有 細因持表之側 4 端 1 安設 較細保上 1 裝部柄 214 4 粗上刻柄安端曲孔柄部 部之致，曲軸柄之裝曲端 端 1 大等，柄曲側安將柄 柄柄都法時曲之裝軸，曲 曲曲點印同在側安柄 1 之 側令一刻。小裝軸曲 2 側 裝爲那射等大安柄之孔裝 安因在雷標其板曲 5 裝安 板。力用商，踏之軸安板 踏粗應利，1 腳 1 柄軸踏 腳較之可稱 1 向柄曲 '柄腳 ，2 柄面名部而曲在曲之 示部曲表品角，在裝此 1 所端在之製面大 安用柄 圖柄加 1 或弧較 1 利曲 本紙張尺度適用中國國家標準（CNS ) A4規格（210X297公釐） 經濟部中央橾隼局員工消費合作社印製 A7 _____B7_五、發明説明（3 ) 41·而在此腳踏板安裝孔41安裝未圖示之腳踏板。 第2圖係曲柄1之側面圖。第3圖係從側面看曲柄1 之截面圖。在曲柄中央部3之背側，設有向長度方向延伸 之凹溝3 1。凹溝3 1之形狀爲，凹溝3 1之兩端部附近 之溝深度向兩端部連績變小，在兩端部之深度最淺。亦即 ，凹溝3 1之底面形狀呈所謂船底型。凹溝3 1之中央部 底面大致上與曲柄中央部3之表側表面平行。 ，+, 在此凹溝3 1之開放面側形成有台階部3 2，將蓋構 件3 3嵌入此台階部3 2，而利用氬氣之鈍氣電弧焊接固 接蓋構件3 3之周圍在曲柄1本體。曲柄1本體之裏側表 面，與蓋構件3 3之表面在同一平面。同時，焊接所形成 之隆起部也藉切削加工等加以削去，使成同一平面較佳。 在曲柄軸安裝側之曲柄端部2設有曲柄軸安裝孔2 1 。曲柄軸安裝孔2 1之內面向內側突設有突緣2 2，並與 該突緣2 2之裏面側連接設有雌之鋸齒狀缺口 2 3 »較曲 柄軸安裝孔2 1之鋸齒狀缺口 2 3爲裏面側之部分構成爲 定芯部2 4。定芯部2 4可以是內徑不變化之筆直形狀， 但通常是內徑向裏側擴大之推拔孔形狀’推拔角（Taper Angle)係2 〜3° 。 在曲柄軸安裝側之曲柄端部2之裏面突出部之外周根 基部形成有阻止齒輪板6轉動用之雄之鋸齒狀缺口 25 ， 在裏面突出部之外周部形成有固定齒輪板6用之雌螺紋 2 6° 第4圖係從背面看曲柄1之圖。鋸齒狀缺口 2 3 ， (請先閲讀背面之注意事項再填寫本頁) 本紙张尺度適用中國國家梂準（CNS ) A4規格（210X297公釐） 321625 A7 B7 經濟部中夬橾準局員工消资合作社印製 五、發明説明（4 ) 2 4係如第4圖所示之8齒者爲適當•齒數少時，轉動結 合之結合強度會不足’齒數太多時’加工會較爲困難而使 成本提高，同時轉動方向之定向定位作業也容易出錯· 第5圖係第1圖之A — A ’ B — B，C-C切斷線之 箭頭方向截面圖。（A)係A — A箭頭方向所視截面圖’ (B)係B-B方向所視斷面圖，（C)係C-C方向所 視截面圖。曲柄中央部3之截面內部大部分形成爲凹溝 3 1，以拜輕量化。 第6圖係.表示曲柄軸5外觀之圖。在曲柄軸5之兩端 部形成有定芯部5 2 °定芯部5 2可以是直徑不變化之筆 直形狀，但通常是端部變細之推拔形狀，推拔角度爲 2〜3 ° 。在較.定芯部5 2爲端部側設有雄之鋸齒狀缺口 5 1。鋸齒狀缺口 5 1由8齒構成，齒之外周面與定芯部 5 2之外周面成連續之表面。鋸齒狀缺口 5 1之齒之形狀 係兩側面成平行平面之角形齒。因爲以垂直於結合力之平 面承受轉動方向之結合力，因此不會鬆動。 在曲柄軸5之端面設有曲柄1固定用之雌螺紋5 3。 曲柄軸5係空心管狀，如第7圖所示，中央部之管壁厚度 較兩端部爲薄。曲柄軸5之材質爲鋁合金，又是空心，因 此對輕量化有貢獻。 第7圖表示裝配曲柄軸5，曲柄1與齒輪板6而成之 組裝體。在一方之曲柄1安裝齒輪板6 ，由鋸齒狀缺口 2 5阻止其轉動，而由螺母6 1固定之*固定有齒輪板6 之曲柄1安裝在曲柄軸5之一方端部，而由螺栓5 4固定 (請先閲讀背面之注意事項再填寫本頁) 本紙張欠度逍用中國國家梯率（CNS ) Α4ϋ格（210X297公釐） 經濟部中央揉準局員工消背合作社印製 A7 _. _B7 _五、發明説明（5 ) 之。曲柄軸5之另一端安裝固定有無齒輪板之曲i柄1»曲 柄1之定芯部2 4與曲柄軸5之定芯部5 2密接嵌合在一 起，而得準確定好雙方之芯。同時，曲柄1之雌鋸齒狀缺 口2 3與曲柄軸5之雌鋸齒狀缺口 5 1相互嚙合，以高準 確度完成轉動方向之結合》 (其它實施形態） 上述曲柄軸5之定芯部5 2與 成推拔結合狀.態，藉此兩推拔面強 ，由曲柄軸5卸下曲柄1時，必須 圖所示之其他實施形態係使用固定 栓5 4，使上述密接分離開。 在螺栓5 4之頭部成一體狀形 軸5與曲柄1固定爲一體時，係介 5 4。在曲柄軸安裝孔2 1之內周 5 8。卸下曲柄1與曲柄軸5時， 。螺栓5 4之突緣5 5推壓著E環 因此，突緣5 5可將曲柄1驅 曲柄軸5之定芯部5 2與曲柄1之 。採用此構造時，不必使用特殊工 再者，本實施例之形態係配設 成一體形成相當於E環5 8者，也 I 本發明構成如上述，因此具有 曲柄與曲柄軸之定芯準確度提 曲柄1之定芯部2 4係 力地密接在一起。因此 使用卸下用工具》第8 曲柄1於曲柄軸5之螺 成有突緣5 由墊圈5 6 溝5 7插入 可將6角鍵 5 8之側面 向軸線方向 定芯部2 4 具。 E環，但亦 可以焊接其 下列效果。 髙·轉動方 5。將曲柄 鎖緊螺栓 固定有E環 轉向反方向 〇 ，簡單卸下 之推拔結合 可與曲柄1 他構件。 向之結合強 ^-----；--.---裝------訂 (請先閲讀背面之注$項再填寫本頁) t纸张欠度適用中國國家梂準（CNS_) A4規格（2丨0X297公瘦） 8 五、發明説明（6 ) ㈣gir时—民网，修修正 度也增強。尤其是因輕置化而採用鋁合金之空心管作爲曲 柄軸’而採用銘合金之空/L、構造之曲柄時，安裝準確度及 結合強度仍然充分大。 因爲轉動結合部與定芯部分開，鋸齒狀缺口之嵌合長 度較短，加工成本不大。而鋸齒狀缺口之齒爲角形齒，不 會在使用中發生鬆動· 圖式之簡單說明 第1圖係本發明實施形態1之曲柄1之正面圖。 第2圓係曲柄1之側面圚· 第3圖係從側面所視之曲柄1之截面圖。 第4圖係從背面所視之曲柄1之圖。 第5圖係第1圖之A_A，B — B，C — C切斷線之 截面圖。 第6圖係表示本發明.曲柄軸5之外觀之圖。 第7圖係表示將曲柄1安裝在曲柄軸5之本發明之曲 柄組裝體之圖。 第8圓係表示曲柄軸與曲柄相結合之其他實施形態之 截面圖》 圖號說明 1 :曲柄 2、4 :曲柄端部 5 :曲柄軸 _ 本紙張尺度適用中國國家梯準（CNS ) A4規格（210X297公釐） (請先閲讀背面之注意Ϋ項再填寫本頁) .装. 訂 經濟部中央梂準局貝工消费合作社印装 321625 經濟部中央標準局貝工消費合作社印裝 五、發明説明（7 ) 2 2 2 3 3 3 5 5 □ 缺 狀 齒 鋸 孔：部 裝 1 芯 安 5 定 軸、： 部件 板柄 52 溝階構栓圈 輪曲 25 凹台蓋螺墊 ··、 , ·· ·'··♦ _· : 13412346 本紙張尺度逋用中國國家標準（CNS ) A4規格（210X297公釐） A7 B7(Please read the precautions on the back before filling in this page) This paper uses the Chinese National Standard (CNS) A4 specifications (210X297mm) 321625 A7 -------- B7_ V. Description of invention from) The shaft mounting portion includes a centering portion that centers the crank shaft and the crank, and a rotation coupling portion that positions and fixes the crank shaft and the crank in the rotation direction. In addition, the connecting portion of the crank may be indented. At the same time, the rotating connecting portion and the centering portion may adopt a straight shape in which the inner diameter does not change in the axial direction. good. Furthermore, the number of teeth of the crank shaft or the serrated notch of the crank is preferably 8. The crank assembly for a bicycle of the present invention is one in which the crank is attached to both ends of the crank shaft. The embodiments of the present invention are described below with reference to the drawings. Fig. 1 shows a front view of the crank 1 of the present invention. The crank 1 is made of aluminum alloy, as in the first one (please read the precautions on the back before filling in this page). The crank printed by the Ministry of Economic Affairs Central Standards Bureau Beigong Consumer Cooperative has a near handle, which can be marked as attached on the side. Qu shows. Hole installation, in the shape 2 will install all 5 installation. Ministry of Commerce. There is a picture of the shaft, the shaft becomes small, the corner of the factory is small, and the 6-handle shank is changed, and the large angled shank is changed. The first step is set on the custom surface. 2 If it is on the foot, the position of the table is shown. The side of the watch is equipped with a small one. The 4 ends of the watch holding 1 are installed with a small thickness. The upper part of the mounting handle 214 4 is thickly engraved with the end of the curved end of the handle. The crank end of the crank handle is 1 large, and the handle is curved. On the side, the handles and handles are all fitted with a curved shaft, and the curved points are printed on the side of the side handle 1 for a moment. Small installation shaft curve 2 sides are installed for the hole of the large safety handle such as Nashe. Use the power, the shaft of the pedal should be thicker than the pedal, 1 foot and 1 shank shaft foot can be called 1-way shank 'shank, 2 shank face name and tune in the show section of the tune. In the installation of this one, the surface of Daan with handle handle plus 1 or arc is more than 1 liqu. This paper standard is applicable to the Chinese National Standard (CNS) A4 specification (210X297 mm). Printed by the Employee Consumer Cooperative of the Central Falcon Bureau of the Ministry of Economic Affairs. System A7 _____B7_ V. Description of the invention (3) 41 · In this foot pedal mounting hole 41, a foot pedal (not shown) is installed. FIG. 2 is a side view of the crank 1. Figure 3 is a cross-sectional view of the crank 1 viewed from the side. On the back side of the crank central portion 3, a groove 31 extending in the longitudinal direction is provided. The shape of the concave groove 3 1 is such that the depth of the groove near the both ends of the concave groove 3 1 decreases gradually toward both ends, and the depth at both ends is the shallowest. That is, the bottom shape of the ditch 31 is a so-called bottom shape. The bottom surface of the center portion of the recess 31 is substantially parallel to the front surface of the center portion 3 of the crank. , +, A stepped portion 3 2 is formed on the open surface side of the concave groove 3 1, the cover member 3 3 is fitted into this stepped portion 3, and the cover member 3 3 is fixed around by a blunt gas arc welding of argon gas at Crank 1 body. The inner surface of the body of the crank 1 is on the same plane as the surface of the cover member 33. At the same time, the bulge formed by welding is also removed by cutting, etc., so that it is better to form the same plane. A crank shaft mounting hole 2 1 is provided at the crank end 2 of the crank shaft mounting side. The inner surface of the crank shaft mounting hole 2 1 protrudes with a flange 2 2, and is connected to the inner side of the flange 2 2 with a female zigzag notch 2 3 »Compared with the crank shaft mounting hole 2 1 2 3 is a portion of the back side configured as a fixed core portion 24. The fixed core portion 24 may have a straight shape with an inner diameter that does not change, but it is usually a shape of a push hole that expands toward the inner side of the inner radial direction. The taper angle (Taper Angle) is 2 to 3 °. A serrated notch 25 for preventing rotation of the gear plate 6 is formed on the outer peripheral base of the inner protruding portion of the crank end 2 of the crank shaft mounting side, and a female thread for fixing the gear plate 6 is formed on the outer peripheral portion of the inner protruding portion 2 6 ° Figure 4 is a view of crank 1 from the back. Zigzag gap 2 3 (Please read the precautions on the back before filling in this page) This paper size is applicable to China National Standards (CNS) A4 specifications (210X297 mm) 321625 A7 B7 Ministry of Economic Affairs, Central Bureau of the Ministry of the Ministry of Economic Affairs to eliminate capital Printed by the cooperative. 5. Description of the invention (4) 2 4 is suitable for 8 teeth as shown in Figure 4. • When the number of teeth is small, the joint strength of the rotating joint will be insufficient. When there are too many teeth, processing will be more difficult and cause The cost is increased, and the directional positioning operation in the direction of rotation is also prone to errors. Figure 5 is a cross-sectional view in the arrow direction of the A-A'B-B, CC cut-off line of Figure 1. (A) is a cross-sectional view viewed from the direction of arrow A-A '(B) is a cross-sectional view viewed from direction B-B, and (C) is a cross-sectional view viewed from direction C-C. The inside of the cross section of the crank central portion 3 is mostly formed as a concave groove 31 to reduce the weight. Figure 6 is a diagram showing the appearance of the crank shaft 5. A fixed core portion 5 2 ° is formed at both ends of the crank shaft 5. The fixed core portion 5 2 may be a straight shape with no change in diameter, but it is usually a push-out shape with tapered ends, and the push-out angle is 2 to 3 ° . In the comparison. The fixed core portion 5 2 is provided with a male zigzag notch 51 on the end side. The zigzag notch 51 is composed of 8 teeth, and the outer peripheral surface of the tooth and the outer peripheral surface of the fixed core portion 5 2 are continuous surfaces. Zigzag notch 51 The shape of the tooth is an angle tooth with parallel planes on both sides. Because the plane perpendicular to the coupling force receives the coupling force in the direction of rotation, it will not loosen. A female thread 53 for fixing the crank 1 is provided on the end surface of the crank shaft 5. The crank shaft 5 is a hollow tube. As shown in Fig. 7, the thickness of the tube wall at the center is thinner than at both ends. The crank shaft 5 is made of aluminum alloy and is hollow, so it contributes to weight reduction. Fig. 7 shows an assembly in which the crank shaft 5, the crank 1 and the gear plate 6 are assembled. The gear plate 6 is mounted on one of the cranks 1, and its rotation is blocked by a saw-tooth-shaped notch 25, while the crank 1 fixed with the gear plate 6 by the nut 6 1 is mounted on one end of the crank shaft 5, and the bolt 5 4Fixed (please read the precautions on the back and then fill out this page) This paper is not easy to use China National Rate (CNS) Α4ϋ grid (210X297mm) Printed A7 _. _B7 _V. Description of the invention (5). The other end of the crank shaft 5 is fixed with a crank plate i without a gear plate 1 »the fixed core portion 2 of the crank 1 and the fixed core portion 5 2 of the crank shaft 5 are tightly fitted together, and the cores of both sides can be accurately determined. At the same time, the female zigzag notch 23 of the crank 1 and the female zigzag notch 5 1 of the crank shaft 5 mesh with each other to complete the combination of the rotation directions with high accuracy "(other embodiments) The fixed core portion 5 2 of the crank shaft 5 Combining with the push-pull state, by which the two push-pull surfaces are strong, when the crank 1 is removed from the crank shaft 5, the other embodiment shown in the figure must use a fixing bolt 54 to separate the above-mentioned close contact. When the head of the bolt 54 is integrated, the shaft 5 is fixed to the crank 1 as a whole, and the bolt 5 4 is inserted. Within the circumference 5 8 of the crankshaft mounting hole 21. When removing crank 1 and crank shaft 5,. The flange 5 5 of the bolt 5 4 pushes the E-ring. Therefore, the flange 5 5 can drive the crank 1 between the fixed core portion 5 2 of the crank shaft 5 and the crank 1. When using this structure, there is no need to use special tools. The shape of this embodiment is configured to be integrated to form the E ring 58. Also the structure of the present invention is as described above, so it has the centering accuracy of the crank and the crank shaft The fixed core portions 24 of the crank 1 are tightly connected together. Therefore, using the removal tool "8th crank 1 is screwed into the crank shaft 5 with a flange 5 inserted through the washer 5 6 groove 5 7 to insert the side of the 6 angle key 5 8 in the axial direction to fix the core 2 4 pieces. E ring, but the following effects can also be welded. High turn side 5. The crank lock bolt is fixed with an E ring and turned in the opposite direction. It can be easily removed and combined with other components of the crank. Combining strong with it ^ -----; --.--- installed ----- ordered (please read the $ item on the back and then fill in this page) tPaper under-applicability is applicable to China National Standard (CNS_ ) A4 specification (2 丨 0X297 male thin) 8 V. Description of the invention (6) (gir time-civil network, the revision degree is also enhanced. Especially when the hollow tube made of aluminum alloy is used as the crank shaft due to lightening, and the hollow / L, structured crank of Ming alloy is used, the installation accuracy and bonding strength are still sufficiently large. Because the rotation joint part is separated from the fixed core part, the fitting length of the serrated notch is shorter, and the processing cost is not large. The teeth of the zigzag notch are angular teeth, and will not loosen during use. Brief description of the drawings. FIG. 1 is a front view of the crank 1 according to Embodiment 1 of the present invention. The second circle is the side of the crank 1 · Figure 3 is a cross-sectional view of the crank 1 viewed from the side. Figure 4 is a view of the crank 1 viewed from the back. Figure 5 is a cross-sectional view of the A_A, B—B, and C—C cutting lines in Figure 1. FIG. 6 is a diagram showing the appearance of the crank shaft 5 of the present invention. Fig. 7 is a view showing the crank assembly of the present invention in which the crank 1 is mounted on the crank shaft 5. The eighth circle is a cross-sectional view showing other embodiments of the combination of the crank shaft and the crank. "Description of Drawing Numbers 1: Crank 2, 4: Crank End 5: Crank Shaft_ This paper size applies to China National Standards (CNS) A4 specifications (210X297mm) (Please read the note Ϋ on the back before filling in this page). Packing. Ordered by the Central Bureau of Economic Affairs of the Ministry of Economic Affairs Beigong Consumer Cooperative Printed 321625 Printed by the Central Bureau of Standardization of the Ministry of Economic Affairs. Description (7) 2 2 2 3 3 3 5 5 □ Missing tooth saw hole: part installation 1 core safety 5 fixed shaft ,: part plate handle 52 groove stepped structure ring bend 25 concave table cover screw pad ··· '·· ♦ _ ·: 13412346 This paper scale adopts China National Standard (CNS) A4 specification (210X297 mm) A7 B7
H. ^^1 n I - - III ^^1 1^1 -I,*水^^" I - ^ (請先閲讀背面之注意事項再填寫本頁) 訂 -10 -H. ^^ 1 n I--III ^^ 1 1 ^ 1 -I, * water ^^ " I-^ (please read the precautions on the back before filling this page) Order -10-