M353154 五、新型說明： 【新型所屬之技術領域】 本創作係與自行車傳動結構之技術領域有關，特別 ， 是有關於一種能搭配自行車之鏈輪使用的皮帶輪結構。 【先前技術】 ' 近年環保意識抬頭、休閒風氣日盛、油價波動幅度大， φ 再加上各種媒體的催化作用，騎乘自行車儼然已成為最時 尚的一股風潮。因此，自行車的設計便朝向多元化、個性 化的方向發展。 目前一般的自行車幾乎都是由鏈條、鏈盤與鏈輪作為 傳動的構件。但鏈條在使用上需要添加潤滑油來作適當的 潤滑，因此在使用一段時間後，鏈條上的油脂會沾滿灰塵 及摩·耗產生的金屬屑，而在鏈條上形成滿佈烏黑黏腻的油 • 污，使用者在騎乘或搬運的過程中稍一不慎便會沾上這些 難以清洗的油污，這是目前自行車最為使用者垢病的問題 之一。 若將鏈條、鏈盤與鏈輪更換為齒皮帶與皮帶輪，便能 克服前述的油污問題，讓騎乘者能以更間適的心情來騎乘 自行車進行休閒運用。 但要將鏈條、鏈盤與鏈輪改裝更換為齒皮帶與皮帶輪 ，並不是單純地直接更換構件即可，因為自行車出廠時後 3 M353154 輪的鏈輪中包含了單向驅動的飛輪構造，而且各家廠商所 使用的飛輪構造與後輪花轂之結合結構並不盡相同，因此 若要將後輪的鏈輪飛輪結構更換為皮帶輪飛輪結構，必須 ' 更換的構件相當多，這會導致更換的花費成本相對變高， ' 而且進行更換的難度也相對增加許多。 因此，如何設計出一種能易於裝配且成本低廉之自行 . 車用皮帶輪結構便成為本創作之首要課題。 【新型内容】 本創作之主要目的，在於解決上述的問題而提供一種 直接與鏈輪結合之自行車用皮帶輪結構，從而能達到易於 組裝且降低成本之雙重功效。 為達前述之目的，本創作的自行車用皮帶輪結構係包 括一皮帶輪與一固定環。該皮帶輪概呈環狀，而於其外緣 • 具有一齒部用以與齒皮帶嚅合，其内緣具有一嵌合部，俾 供自行車之鍵輪敌合，且該皮帶輪内緣於該嵌合部兩側分 別具有一凸緣與一開放部，該鏈輪係經由該開放部嵌入該 嵌合部，並靠抵於該凸緣定位，該固定環之外形係與該開 放部配合，並結合固定於該開放部以固定該鏈輪。 據此，本創作之皮帶輪結構可直接組裝於鏈輪，而達 到易於組裝且降低成本之雙重功效。 本創作之上述及其他目的與優點，不難從下述所選用 M353154 實施例之詳細說明與附圖中，獲得深入了解。 . 曰：,、：本創作在某些另件上，或另件之安棑上容許有 所不同’但所選用之實施例，則於本說明書中，予以詳細 說明，並於附圖中展示其構造。 % 【實施方式】 冑參關1及圖2，其係本創作所制之第—實施例 籲之結構圖示。圖1係本創作之立體分解圖；圖2係本創作 之組合剖視示意圖。 本創作之自行車用皮帶輪結構，其係用於與自行車後 輪具有飛輪結構之鏈輪5直接結合。該皮帶輪結構係由一 •皮帶輪1、一固定環2與二擋板3所組成。 該皮帶輪1概呈環狀，而於其外緣具有一齒部丄工， 其内緣具有-嵌合部1 2 ’俾供與自行車之鏈輪5喪合， • 且該皮帶輪1内緣於該嵌合部i 2兩侧分別具有一凸緣工 3與一開放部1 4，該鏈輪5係經由該開放部丄4嵌入該 般合部1 2 ’並靠抵於該凸緣1 3定位。 該固定環2之外形係與該開放部i 4配合且呈環狀， 並被結合固定於該開放部i4中，而可藉由該固定環2與 s亥凸緣1 3，將該鏈輪5夾固於該嵌合部1 2中。 再者，該皮帶輪1兩側分別具有一擋板3 ,且各浐板 3係徑向凸伸至該齒部1 1兩側，並且略高於該齒部1 M353154 1，俾可藉由該二擋板3將皮帶（圖中未示）限制於該齒 部1 1之中。 於本實施例令，該二擋板3係為獨立之構件，而藉由 數個鉚釘形態的固定件4將該二擋板3、該固定環2與該 皮帶輪1結合固定。當然，前述的固定件，除了使用鉚釘 之外，亦可選用螺栓等構件；或者’該二擋板亦可為與該 皮帶輪或固定環一體延伸之結構。 而為了使該鏈輪5與該皮帶輪1之間能確實地固定結 合，該嵌合部12被設計成與該鏈輪5相互配合的外形， 亦即該嵌合部12對應該鏈輪5具有數個徑向凸出之凸齒 1 2 1，使該鏈輪5與該嵌合部1 2之間能確實地固定結 合’並且能有效地傳遞動力。 本創作藉由在皮帶輪1的内緣設置凸緣1 3、嵌合部 1 2及開放部14，並配合固定環2，而可將該鏈輪5夾 置固定於該皮帶輪1中，如此一來，便能在不更動其他構 件的蝻題之下，使原本的鏈輪5直接變裝成為皮帶輪1， 進而達到易於組裝且降低成本之功效。 再請參閱圖3，其係本創作第二實施例之組合剖視示 思圖。其中該皮帶輪1A的開放部丄4A具有一内螺紋部 1 4 1，而該固定環2 A對應具有一外螺紋部2丄，使該 固定環2 A可直接旋鎖較於該開放部i 4A，而將該鍵 輪與邊皮帶輪1 a結合m定，前述之二擋板3則分別結合 M353154 於_定環2 A與該皮帶輪1A的另-側，如此，亦可達 到與前述第一實施例相同之功效。 以上所述實施例之揭示係用以說明本創作，並非用以 ^本創作’故舉凡數值之變更鱗效元件之置換仍應隸 屬本創作之範疇。M353154 V. New description: [New technical field] This creation is related to the technical field of bicycle transmission structure. In particular, it relates to a pulley structure that can be used with a bicycle sprocket. [Prior Art] In recent years, environmental awareness has risen, leisure has become more popular, oil prices have fluctuated greatly, and φ, coupled with the catalysis of various media, has become the most popular trend. Therefore, the design of the bicycle is moving towards a diversified and individualized direction. At present, almost all bicycles are driven by chains, chains and sprockets. However, the chain needs to be lubricated for proper lubrication. Therefore, after a period of use, the grease on the chain will be covered with dust and metal chips generated by friction and wear, and the chain will be covered with black and sticky. Oil and dirt, the user may be exposed to these hard-to-clean oils during the riding or handling process. This is one of the most serious problems for bicycle users. If the chain, the chain plate and the sprocket are replaced with a toothed belt and a pulley, the aforementioned oil pollution problem can be overcome, and the rider can ride the bicycle in a more comfortable mood for leisure use. However, if the chain, the chain plate and the sprocket are modified and replaced with a toothed belt and a pulley, it is not simply a direct replacement of the component, because the sprocket of the 3 M353154 wheel includes a one-way driven flywheel structure when the bicycle is shipped from the factory, and The combination of the flywheel structure and the rear wheel hub used by various manufacturers is not the same. Therefore, if the sprocket flywheel structure of the rear wheel is replaced with the pulley flywheel structure, there must be a lot of replacement components, which will result in replacement. The cost is relatively high, 'and the difficulty of replacing it is relatively large. Therefore, how to design a self-assembling and low-cost self-propelled vehicle pulley structure has become the primary subject of this creation. [New content] The main purpose of this creation is to solve the above problems and provide a bicycle pulley structure that is directly coupled with a sprocket, thereby achieving the dual effects of easy assembly and reduced cost. For the foregoing purposes, the bicycle pulley structure of the present invention includes a pulley and a retaining ring. The pulley is substantially annular, and has a tooth portion for engaging with the tooth belt at the outer edge thereof, and has a fitting portion at the inner edge thereof for the key wheel of the bicycle to be hosted, and the inner edge of the pulley is Each of the two sides of the fitting portion has a flange and an opening portion. The sprocket is embedded in the fitting portion via the opening portion and is positioned against the flange. The outer shape of the fixing ring cooperates with the opening portion. And being fixed to the opening portion to fix the sprocket. Accordingly, the belt structure of the present invention can be directly assembled to the sprocket, thereby achieving the dual functions of being easy to assemble and reducing the cost. The above and other objects and advantages of the present invention are readily apparent from the detailed description of the embodiments of the M353154 and the accompanying drawings.曰:,:: This creation is allowed to differ on certain parts, or on the ampules of the other parts. However, the selected examples are described in detail in this manual and are shown in the drawings. Its construction. [Embodiment] 胄 关 1 1 and Fig. 2, which are diagrams of the structure of the first embodiment made by the present invention. Figure 1 is a perspective exploded view of the present creation; Figure 2 is a schematic cross-sectional view of the present creation. The bicycle pulley structure of the present invention is used for direct coupling with a sprocket 5 having a flywheel structure on a bicycle rear wheel. The pulley structure is composed of a pulley 1, a fixed ring 2 and two baffles 3. The pulley 1 is substantially annular and has a toothed portion at its outer edge, the inner edge of which has a fitting portion 1 2 '俾 for splicing with the bicycle sprocket 5, and the inner edge of the pulley 1 is The two sides of the fitting portion i 2 respectively have a flange 3 and an open portion 14 , and the sprocket 5 is inserted into the joint portion 1 2 ′ via the open portion 并 4 and abuts against the flange 13 Positioning. The outer shape of the fixing ring 2 is matched with the opening portion i 4 and is annular, and is fixedly fixed in the opening portion i4, and the sprocket can be fixed by the fixing ring 2 and the sling flange 13 5 is clamped in the fitting portion 1 2 . Furthermore, the two sides of the pulley 1 respectively have a baffle 3, and each of the jaws 3 protrudes radially to the two sides of the tooth portion 1 1 and is slightly higher than the tooth portion 1 M353154 1 The second baffle 3 confines a belt (not shown) to the tooth portion 1 1 . In the embodiment, the two baffles 3 are independent members, and the two baffles 3 and the retaining ring 2 are fixedly coupled to the pulley 1 by a plurality of fixing members 4 in the form of rivets. Of course, the aforementioned fixing member may be a member such as a bolt or the like in addition to the rivet; or the two baffles may be configured to extend integrally with the pulley or the fixing ring. In order to enable the fixed connection between the sprocket 5 and the pulley 1, the fitting portion 12 is designed to cooperate with the sprocket 5, that is, the fitting portion 12 has a corresponding sprocket 5 A plurality of radially projecting convex teeth 1 2 1 enable the sprocket 5 and the fitting portion 1 2 to be surely fixedly coupled and can transmit power efficiently. In the present invention, by providing the flange 13 , the fitting portion 1 2 and the opening portion 14 on the inner edge of the pulley 1 and engaging the fixing ring 2, the sprocket 5 can be clamped and fixed to the pulley 1, such that In this way, the original sprocket 5 can be directly transformed into the pulley 1 without changing the other components, thereby achieving the effect of easy assembly and cost reduction. Referring again to Figure 3, a cross-sectional view of the second embodiment of the present invention is shown. The open portion 丄4A of the pulley 1A has an internal thread portion 144, and the fixing ring 2A has an externally threaded portion 2A so that the fixing ring 2A can be directly locked and locked than the open portion i 4A. And the key wheel is combined with the side pulley 1 a, and the two baffles 3 are respectively combined with M353154 on the other side of the ring 2 A and the pulley 1A, so that the first implementation can also be achieved. The same effect. The above description of the embodiments is intended to be illustrative of the present invention and is not intended to be a limitation of the present invention.
由以上詳細說明 確可達成前述目的， 申請。 ，可使熟知本項技藝者明瞭本創作的 實已符合專利法之規定’爰提出專利 【圖式簡單說明】 圖1係本創作之立體分解圖； 2係本創作之組合剖視^ >意圖；及 3係本創作第二實施例之組合剖視示意圖 【主要元件符號說明】 皮帶輪1 嵌合部1 2 齒部1 1 開放部1 4： 凸緣1 3 擋板3 固定環2 鏈輪5 鉚釘4 皮帶輪1 A 開放部1 4 A 凸齒1 2 1 固定環2 A 内螺紋部14 擋板3 外螺紋部2 1From the above detailed description, the above objectives can be achieved and applied. It can be known to those skilled in the art that the creation of this creation has been in compliance with the provisions of the Patent Law '爰Proposed patents' [Simple Description] Figure 1 is a three-dimensional exploded view of the creation; 2 is a combination of the creation of the creation ^ >Intent; and 3 is a schematic cross-sectional view of the second embodiment of the present invention [Description of main components] Pulley 1 Fitting 1 2 Tooth 1 1 Open 1 4: Flange 1 3 Baffle 3 Retaining ring 2 Sprocket 5 rivet 4 pulley 1 A open part 1 4 A convex tooth 1 2 1 fixing ring 2 A internal threaded part 14 baffle 3 external thread part 2 1