M299131 八、新型說明： 【新型所屬之技術領域】 本創作係與一種自行車有關，更詳而言之，特別是指 :種心轴之結合端與曲柄之貫孔接合處分別斜設有—外錐 p及内錐邛，使该心軸與曲柄間卡接時可自行導正之自行 車曲柄與心軸之結合構造。 【先前技術】 按，凊麥閱第一圖所示，習知自行車丄〇之心軸丄1 _ 14曲柄1 2間為了要減少重量及組合之零件，該心軸1 1 之末端外側會軸向環凸設有預定齒數之外凸齒i i i，同 .時該曲柄12之中央貫設有—貫孔121，該貫孔121 之内環周亦會相對於該外凸齒111軸向環凸設有相對之 ^凸齒1 2 2，該曲柄χ 〇之貫孔i丄係相對套合於該心 由1 1上，並藉由該内凸齒1 2 2及外凸齒工丨工間之緊 =來達成限位固定，使該心軸.丄丄與該曲柄]2間不需 _頜外增加零配件即可達成組接固定者。 【新型内容】 准4知自行車1 〇之曲柄1 2與心軸1 1苴套人 ::，若：軸11與該曲柄12之貫孔121間組裝二 :D之偏差’則該心軸工工與該曲柄"嵌合時及會產生 二則該心軸i丄裝設於自行車上轉動時會使該曲柄工 工"：角度之偏移，4 了避免心轴11偏心，則需於加 日守相對增加額外之注意力，如此會降低加工之速度，且 加工之失敗率亦相對提升，而增加其h M299131 本創作提供一種自行車曲柄與心軸之結合構造，立主 要糸包含有-曲柄及-心轴等構件所組成，該曲柄中 軸向貫設有一貫孔，該貫孔之内環 、” 門衣周係成形有一内齒部及 -内錐部，該内齒部係位於該貫孔之底部且沿軸向環凸# 有預定數目之内凸齒，同時，該内錐部係位於該貫孔之^ :，該内錐部係沿軸向傾斜有一預定錐度且朝頂面漸擴 者，該心軸之末端外環側相對於該貫孔成形有一結合部，' 該結合部並成形有-外齒部及—外錐部，該外齒部係位於 該結合部之内側且沿軸向環凸設有預定數目之外凸齿"亥 外錐部係位於該結合部之㈣，該外錐料沿軸向傾斜有/ 一預定錐度且朝外側漸擴者，組接時，將該心軸套入該曲 ，之貫孔内，該心軸之外齒部與該貫孔之内齒部相互咬合 嵌固，接著，該心軸之外錐部會與該貫孔之内錐部相ς 合者。 " 本創作所提供之自行車曲柄與心軸之結合構造，該心 轴之外錐部與該貫孔之内錐部同心嵌合者，使該心軸組裝 時能自動與該曲柄導正，使該心軸與曲柄加工時不易產生 偏心’可降低加工成本，提升生產速度者。 【實施方式】 請參閱第二、三圖，本創作提供一種自行車曲柄與心 軸之結合構造之較佳實施例，其主要係包含有一曲柄2 〇 及一心軸3 0等構件所組成，其中； 該曲柄2 0係一體成形有一本體2 ]^及一侧徑向向外 延伸之連接桿2 2，該本體2 1之中央並軸向貫設有—貫M299131 VIII. New description: [New technical field] This creation is related to a bicycle. In more detail, it means that the joint end of the kind of mandrel and the joint of the crank are respectively inclined. The cone p and the inner cone are configured to combine the crank of the bicycle and the mandrel when the mandrel is engaged with the crank. [Prior Art] According to the first picture of the buckwheat, the conventional bicycle shaft 丄 1 _ 14 crank 1 2 in order to reduce the weight and the combined parts, the outer end of the mandrel 1 1 A convex tooth iii is disposed on the ring, and a central portion of the crank 12 is disposed through the through hole 121. The inner circumference of the through hole 121 is also axially convex with respect to the outer protruding tooth 111. Relative to the convex tooth 1 2 2, the through hole of the crank χ 相对 is relatively sleeved on the core 1 1 , and by the inner convex tooth 1 2 2 and the external convex tooth work = to achieve the limit fixed, so that the mandrel. 丄丄 and the crank] 2 do not need to increase the parts outside the jaw to achieve the assembly fix. [New content] Quasi-four-knowledge bicycle 1 曲 crank 1 2 and mandrel 1 1 苴 set::, if: the shaft 11 and the crank 12 of the hole 121 between the assembly two: D deviation ' then the manipulator When the work is combined with the crank, there will be two occurrences. When the mandrel is mounted on the bicycle, the crank will be offset by the angle: 4, to avoid the eccentricity of the mandrel 11, In addition to the additional attention, this will reduce the speed of processing, and the processing failure rate will increase relatively, and increase its h M299131. This creation provides a combination of bicycle crank and mandrel. a crank and a mandrel, and the like, wherein the crank has a continuous hole in the axial direction, and the inner ring of the through hole is formed with an inner tooth portion and an inner taper portion, and the inner tooth portion is formed Located at the bottom of the through hole and along the axial ring convex # has a predetermined number of inner teeth, and the inner tapered portion is located at the through hole, the inner tapered portion is inclined in the axial direction by a predetermined taper and In the top surface diverging, the outer ring side of the end of the mandrel is formed with a joint portion with respect to the through hole, 'the knot The joint portion is formed with an outer tooth portion and an outer taper portion, the outer tooth portion is located inside the joint portion and is circumferentially annularly convexly provided with a predetermined number of outer teeth " outer taper portion is located in the joint (4), the outer cone material is inclined in the axial direction with a predetermined taper and gradually expands toward the outer side. When assembled, the mandrel is sleeved into the curved hole, and the outer tooth portion of the outer shaft is The inner teeth of the through hole are engaged with each other, and then the outer taper of the mandrel is matched with the inner taper of the through hole. " The combination of the bicycle crank and the mandrel provided by the present invention The taper outside the mandrel and the inner taper of the through hole are concentrically fitted, so that the mandrel can be automatically guided with the crank when assembled, so that the mandrel and the crank are less likely to be eccentric when machining. [Embodiment] Please refer to the second and third figures. The present invention provides a preferred embodiment of a combination of a bicycle crank and a mandrel, which mainly includes a crank 2 〇 and a mandrel 3 0 . And a component, wherein: the crank 20 is integrally formed with a body 2]^ and a Extending radially outwardly of the connecting rod 22, the body is provided with central and axial penetration of 21 - penetration