M415824 五、新型說明： 【新型所屬之技術領域】 本創作係關於一種自行車花轂結構，係利用一線性彈簧即可快速將棘 爪固定於棘齒輪與花轂間，且以線性彈簧本身材料特性，可使棘爪穩固定 位及彈性撐開作動。 【先前技術】 隨著生活水平的提升，人民越來越重視休閑娛樂之品質，利用週休假 日騎乘自行車出遊踏青及接觸大自然已蔚為風尚，而一般使用者騎乘自行 車時常有載人騎乘、紐或是載重物，而相對使用者必須更加施力踩壓腳 踏帶動大尺徑齒盤，使得拉引鍵條驅動小齒徑棘輪轉動並經棘輪帶動花 較與後輪轉動’達成自行車前進之效能。而自行車驅動之關鍵在於棘輪係 利用與後輪花轂内之棘爪相嚅合，來達成棘輪帶動花轂及後輪前進之效 能，而當棘輪受鏈條傳動倒轉時，因花轂内棘爪為單向卡制設計，故倒轉 時棘爪會被倒轉之棘輪推離，使棘爪因棘輪倒轉而脫離嗡合之狀態，而不 產生嚙合連動花轂使後輪後退。 習知腳踏車通常於花轂内設有4或6個棘爪，棘爪各自設有一彈簧以 推頂棘爪與棘輪作動，使用者騎乘自行車常會於負重下以重踩腳踏驅動前 行，或是於空轉情況下突然反向重踩腳踏，上述情況都可能導致花轂内棘 爪損壞或是用來頂推棘爪之彈簧產生彈性疲乏無法正常頂彈，而需立即檢 查更換，使用者必須以工具於花轂狹小空間内更換棘爪彈簧，且因花轂之 空間狹小不易拆卸裝設，因此導致使用者需花費許多時間與人力。 3 M415824 【新型内容】 鑑於解決上述問題，本創作主要目的乃提供一種自行車花轂結構係 利用一線性彈簧配合棘爪上固定槽之設計，使用者可快速拆卸需更換之彈 簧與棘爪’大幅降低棘爪彈簧更換之難度。 本創作一種自行車花轂結構，其主要包含有： 一花轂、一心軸及一棘齒輪，其係於該花轂内穿設一心軸，該花轂於 一端口内週緣設有複數個棘爪槽，各棘爪槽可供一棘爪設於其中該心軸 上可轉動地設置有一週緣具複數單向棘齒之棘齒輪，且該等棘爪上設有可 噶合於單向棘齒上之嗡合面，並藉由棘齒輪與棘齒之配合，達到使花轂單 向旋轉之目的，其特徵在於：該等棘爪側面朝花轂外側延伸設有一固定槽， 該固定槽τ供-呈c形外張之線性彈簧穿設，並將該等棘爪定位於榦齒輪與 花轂間，以供頂推該等棘爪，使該等棘爪與該棘齒嚅合。 本創作目的之一，係藉由線性彈簧本身材料上之特性，並配合棘爪之 固定槽’可輕易將棘爪固定與進行推頂嗡合之功效。 本創作目的之二，該線性彈簧經過特殊之熱處理，一般人為組裝施力 或使用不當之情況，不易造成彈簧之變形。 本創作目的之三，該線性彈簧取代習知棘爪需各自配置一彈簧頂推， 而只需要一線性彈簧即可固定花轂内之棘爪，使用者可輕易拆卸組裝並節 省構件之成本花費。 【實施方式】 為便於說明本案於上述創作内容一棚中所表示的中心思想，茲以具趙 實施例表達。實施例中各種不同物件係按適於說明之比例、尺寸、變形量 M415824 或位移量而描繪，而非按實際^件的比例扣繪製合歧I且以下的 說明中’類似的元件是以相同的編號來表示。 如第一圖至第七圖圖面所示，本創作係為一種自行車花敎結構主要 包括一花轂10、一心軸20、一棘齒輪3〇。 該花較10為兩端貫通之中空體，該花敎1〇於一端口内週緣設有複數 個棘爪㈣’且該花敎10内壁週面設有複數個供定位之定位孔12，該棘 爪槽11各供-棘爪13設於其中，且該棘爪13設有一供堪合之潘合面從， • 並於棘爪13側面朝花較10外側設有一固定槽131，該固定槽131可供一 呈c形外張之線性彈簧14穿設固定該等棘爪13〇 該心軸20套設兩轴承21，使該心軸2〇可轉動設於餘1〇内且該 心軸20上可轉動地設置有一週緣設有複數單向棘㈣之棘齒輪3〇，且該 棘齒輪30另一端設有一傳動用之鏈輪齒32。 該棘齒輪30上所設之該等棘齒31具有一正棘齒面31 ]以供棘齒輪3〇 正轉時與該棘爪13之嗔合面132潘合，另-逆棘齒面312以供棘齒輪3〇 • 倒轉時’使該棘爪13沿逆棘齒面312轉動而脫離。 該等棘齒31之正棘齒面311於棘齒輪3〇正轉時與該棘爪13之嚅合 面132宽合，並藉由該線性彈簧μ開口端一延伸段14彳固定於定位孔12， 以固定保持彈性頂推該等棘爪13與棘齒31之正棘齒面311嚙合作動，經 由傳動可帶動該棘齒輪30 —端之鏈輪齒32，進而摯動花轂10與後輪產生 旋動’達自行車前進之功能。 明暸上述結構後，以下係針對本創作之動作及原理作一詳細說明： 如第四圖圖面所示’本實施例以六個棘爪13為實施說明，當使用者正 5 M415824 向踩踏一自行車踏板時，係會藉由一鏈條(圖未示)帶動棘齒輪30—端之鏈輪 齒32旋轉’藉由鏈條帶動下，棘齒輪30的棘齒31之正棘齒面311會與棘爪 13之潘合面132相互嚅合（如第五圖所示），嚆合作動下可帶動花轂10轉 動並驅動自行車前進。 當使用者於自行車前進中將腳踏倒踩呈一空轉狀態時，則該棘齒31之 逆棘齒面312因棘齒輪30倒轉，而使該棘爪13沿逆棘齒面312轉動而脫離 (如第六圖所示），使棘齒輪3〇可順利倒轉空轉不受卡制，當固定槽131 隨棘爪13動作時，會對線性彈簧柯施力壓縮而產生一距離D40 (如第七圖 所示），且棘爪13沿逆棘齒面312轉動脫離後，會因線性彈簧14之慣性回 彈，迅速回復呈可與棘齒31潑合之狀態，使自行車可繼續正向踩踏，保持 前進狀態。 且該線性彈簧14開口端所延伸之延伸段141可固定於花轂1〇週面所設 之定位孔12 ’使線性彈簧14可維持其外張之彈性，並可避免線性彈簧14於 棘齒輪30作動時不慎脫落捲入嗡合之棘齒31與棘爪13，造成卡死無法帶動 花轂10轉動。 目前自行車花轂10内棘爪13數量以四或六個居多，本創作之線性彈餐 14可因應自行車花榖10内之棘爪13數量設計而固定該等棘爪13，如第八圖 實施例為八個棘爪13，該線性彈簧14之設計，對於使用者更換棘爪13彈簧 或更換棘爪13非常便利，且經由熱處理之線性彈簧14於拆卸或組裝過程， 不易受人力裝設不當而變形。 雖本創作是以一個最佳實施例作說明，但精於此技藝者能在不脫離本 創作精神與範疇下作各種不同形式的改變。以上所舉實施例僅用以說明本 6 M415824 創作而已，非用以限制本創作之範圍。舉凡不違本創作精神所從事的種種 修改或變化，倶屬本創作申請專利範圍。 M415824 【圖式簡單說明】 第一圖係為本創作之外觀立體圖。 第二圖係為本創作之立體分解圖。 第三圖係為本創作之剖面圖。 第四圖係為本創作棘輪與棘爪正轉之剖面動作示意圖 第五圖係為本創作第四圖之局部放大圖。 第六圖係為本創作棘輪與棘爪倒轉之剖面動作示意圖 第七圖係為本創作第六圖之局部放大圖。 第八圖係為本創作另一實施狀態剖面示意圖。 【主要元件符號說明】 花轂10 心轴20 棘爪槽11 轴承21 定位孔12 棘齒輪30 棘爪13 棘齒31 固定槽131 正棘齒面311 嚅合面132 逆棘齒面312 線性彈簧14 鍵輪齒32 延伸段141 距離D40M415824 V. New description: [New technical field] This creation is about a bicycle hub structure. It can quickly fix the pawl between the ratchet gear and the hub with a linear spring, and the material characteristics of the linear spring itself. The pawl can be stably fixed and elastically actuated. [Prior Art] With the improvement of living standards, people pay more and more attention to the quality of leisure and entertainment. It is fashionable to use bicycles to take a bicycle tour and contact with nature on a weekly holiday, while the average user often rides a bicycle when riding a bicycle. Multiply, load, or load the object, and the user must apply more force to press the foot to drive the large-diameter toothed disc, so that the pull-key strip drives the small-diameter ratchet to rotate and the ratchet rotates the flower to achieve the rotation with the rear wheel. The effectiveness of bicycle advancement. The key to the bicycle drive is that the ratchet system uses the pawl in the rear wheel hub to match the ratchet to drive the flower hub and the rear wheel forward. When the ratchet is reversed by the chain drive, the ratchet in the hub Designed for one-way cardging, the pawl will be pushed away by the inverted ratchet when it is reversed, so that the pawl is disengaged from the twisted state due to the ratchet reversed, and the rear wheel is retracted without engaging the interlocking flower hub. Conventional bicycles usually have 4 or 6 pawls in the flower hub, and the pawls are respectively provided with a spring to push the pawl and the ratchet to move. The user riding the bicycle often drives the pedals under heavy load. Or in the case of idling, suddenly reverse the heavy pedaling, the above situation may cause the pawl in the hub to be damaged or the spring used to push the pawl to be elastic and fatigue, unable to normally top the bomb, and need to be checked and replaced immediately. The pawl spring must be replaced by a tool in a small space of the hub, and the space of the hub is not easy to disassemble, so the user spends a lot of time and manpower. 3 M415824 [New content] In order to solve the above problems, the main purpose of this creation is to provide a bicycle hub structure with a linear spring and a design of the fixing groove on the pawl, the user can quickly disassemble the spring and the pawl to be replaced. Reduce the difficulty of replacing the pawl spring. The invention relates to a bicycle flower hub structure, which mainly comprises: a flower hub, a mandrel and a ratchet gear, wherein a hub is disposed in the flower hub, and the flower hub is provided with a plurality of pawls on a circumference of a port. a slot, each of the pawl slots is provided with a pawl disposed on the spindle, wherein the spindle is rotatably provided with a plurality of one-way ratchet gears on the circumference, and the pawls are provided with a one-way ratchet The upper surface of the coupling surface and the cooperation of the ratchet gear and the ratchet teeth achieve the purpose of unidirectional rotation of the flower hub, wherein the side of the claws extends toward the outer side of the flower hub, and the fixing groove τ A linear spring is provided in the form of a c-shaped outer sheet, and the pawls are positioned between the dry gear and the hub for pushing the pawls to engage the ratchets. One of the purposes of this creation is to easily fix the pawl and perform the push-up effect by virtue of the material properties of the linear spring itself and the fixing groove of the pawl. The second purpose of this creation is that the linear spring is subjected to special heat treatment, and it is generally difficult to cause deformation of the spring due to improper application of force or improper use. For the third purpose of the present invention, the linear springs need to be equipped with a spring pusher instead of the conventional pawl, and only a linear spring is needed to fix the pawl in the hub, and the user can easily disassemble the assembly and save the cost of the component. . [Embodiment] In order to facilitate the explanation of the central idea expressed in the above-mentioned creation content, the present embodiment is expressed by the embodiment of Zhao. The various items in the embodiment are drawn according to the ratio, size, deformation amount M415824 or displacement amount suitable for description, instead of drawing the difference I according to the ratio of the actual parts, and the following elements are the same in the description below. The number is indicated. As shown in the first to seventh figures, the present invention is a bicycle flower bed structure mainly comprising a flower hub 10, a mandrel 20, and a ratchet gear 3〇. The flower is a hollow body through which the two ends are connected, and the flower raft 1 is provided with a plurality of pawls (four) on the inner circumference of the port, and a plurality of positioning holes 12 for positioning are disposed on the inner surface of the inner wall of the flower raft 10, Each of the pawl grooves 11 is provided with a pawl 13 therein, and the pawl 13 is provided with a pan-faced surface for the purpose of the pantograph 13 and a fixing groove 131 is provided on the side of the pawl 13 toward the outer side of the flower 10 The slot 131 is provided with a c-shaped outer linear spring 14 for fixing the pawls 13 . The mandrel 20 is sleeved with two bearings 21 so that the spindle 2 is rotatably disposed in the remaining one and the center The shaft 20 is rotatably provided with a ratchet gear 3 设有 having a plurality of one-way thorns (four) at one side, and a sprocket 32 for transmission is provided at the other end of the ratchet gear 30. The ratchet teeth 31 provided on the ratchet gear 30 have a positive ratchet surface 31] for the ratchet gear 3 to be pivoted with the mating surface 132 of the pawl 13 when the ratchet gear 3 is rotated forward, and the other-anti-ratchet surface 312 When the ratchet gear 3 is reversed, the pawl 13 is rotated along the reverse ratchet surface 312 to be disengaged. The positive ratchet surface 311 of the ratchet teeth 31 is widened with the mating surface 132 of the pawl 13 when the ratchet gear 3 is rotated forward, and is fixed to the positioning hole by the linear spring μ open end and an extension 14彳12, the claws 13 are engaged with the positive ratchet surface 311 of the ratchet teeth 31 by the fixed retaining elastic pushes, and the sprocket teeth 32 of the ratchet gear 30 can be driven by the transmission, thereby pulsing the flower hub 10 and the rear The wheel produces a function of turning 'to reach the bicycle forward. After the above structure is clarified, the following is a detailed description of the action and principle of the present invention: As shown in the fourth drawing, the present embodiment uses six pawls 13 as an implementation description, when the user is stepping on a 5 M415824 When the bicycle pedal is driven by a chain (not shown), the sprocket 32 of the ratchet gear 30 is rotated. By the chain, the positive ratchet surface 311 of the ratchet 31 of the ratchet gear 30 and the spine The panning faces 132 of the claws 13 are coupled to each other (as shown in the fifth figure), and the squeezing motion can drive the flower hub 10 to rotate and drive the bicycle forward. When the user turns the pedal into an idling state during the forward movement of the bicycle, the reverse ratchet surface 312 of the ratchet 31 is reversed by the ratchet gear 30, and the pawl 13 is rotated along the reverse ratchet surface 312 to be disengaged. (As shown in the sixth figure), the ratchet gear 3〇 can be smoothly reversed and idling without being locked. When the fixing groove 131 moves with the pawl 13, the linear spring is forced to compress to generate a distance D40 (such as When the pawl 13 is rotated away from the reverse ratchet surface 312, the pawl 13 rebounds due to the inertia of the linear spring 14, and quickly returns to a state in which it can be slid with the ratchet 31, so that the bicycle can continue to be stepped forward. , keep moving forward. The extending portion 141 extending from the open end of the linear spring 14 can be fixed to the positioning hole 12' provided on the circumferential surface of the hub 1 such that the linear spring 14 can maintain the elasticity of the outer tension and can avoid the linear spring 14 from the ratchet gear. When the 30 is actuated, it is inadvertently detached from the ratchet teeth 31 and the pawl 13, so that the jam can not drive the flower hub 10 to rotate. At present, the number of the pawls 13 in the bicycle hub 10 is four or more. The linear elastic meal 14 of the present invention can be fixed according to the number of the pawls 13 in the bicycle flower bed 10, as shown in the eighth figure. For example, the eight pawls 13 are designed to be convenient for the user to replace the pawl 13 spring or replace the pawl 13, and the linear spring 14 through the heat treatment is not easy to be improperly installed by the human body during the disassembly or assembly process. And deformation. Although the present invention has been described in terms of a preferred embodiment, it is obvious to those skilled in the art that various changes can be made without departing from the spirit and scope of the invention. The above embodiments are only used to illustrate the creation of this document, and are not intended to limit the scope of the present invention. All kinds of modifications or changes that are not in violation of the spirit of this creation are the scope of patent application for this creation. M415824 [Simple description of the drawing] The first picture is a three-dimensional view of the appearance of the creation. The second picture is a three-dimensional exploded view of the creation. The third picture is a cross-sectional view of the creation. The fourth figure is a schematic diagram of the cross-section action of the ratchet and pawl forward rotation. The fifth figure is a partial enlarged view of the fourth figure of the creation. The sixth picture is a schematic diagram of the cross-section action of the ratchet and pawl reversal. The seventh picture is a partial enlarged view of the sixth figure of the creation. The eighth figure is a schematic cross-sectional view of another implementation state of the present creation. [Main component symbol description] Flower hub 10 Mandrel 20 Pawl groove 11 Bearing 21 Positioning hole 12 Ratchet gear 30 Pawl 13 Ratchet 31 Fixed groove 131 Positive ratchet surface 311 Coupling surface 132 Reverse ratchet surface 312 Linear spring 14 Key tooth 32 extension 141 distance D40