M240364 捌、新型說明： 【新型所屬之技術領域】 本發明是關於一種設有輪輻之腳踏車輪子。更正確地 說，本發明是關於具有一種腳踏車輪子，包括有一個輪圈 ，一個輪轂，’輪輻之第一及第二固定部，及將輪轂連接到 輪圈之多個輪輻。輪輻依照其内端是否固定到輪輻之第一 或第二固定部份而被區分成第一及第二組。 【先前技術】 本發明所根據之技術問題在於，在某些應用中，第一 及第二組輪輻受到不同的應力。結果，在使用時，一組之 輪輻對相同輪子之另一組的輪輻受到破斷之更大風險。 此問題產生之第一解決方案顯示在附圖之第1圖中 。此圖顯示一個已知型式之後輪配合在具有兩個前叉臂12 之腳踏車骨架1 0上，其下端設有外殼1 4用來使形成橫向 轉軸16之銷被鎖緊。後輪18包括有輪圈20，及其中間平 面22配置在對臂1 2成中央之位置，以及骨架1 0之固定外 殼14。後輪18包括一個輪轂24及其第一及第二輪輻固定 部各為24a及24b。輪圈20及輪轂24由第一及第二組輪 輻各為28a及28b而相連。第一組輪輻28a被固定到鄰接 鏈輪組26的輪轂24之部份24a，而第二組輪輻28b在最 遠離鏈輪組26之側，被固定到輪轂24之部份24b。 由於鏈輪組26在橫軸16方向上之體積，輪輻28a 3 及28b對後輪18之中間平面22 有不同的傾斜度。在第 圖中，輪輻28a及28b對中間平 弟1 ^之傾斜度分別為α及 '、…之間的差正比於鏈輪級％之軸向體積。 地說，輪輻28a由於鄰接輪輻 钭序 父又而呈現稍微不同的傾 。 <角度αρ α2之平均角度 傳統解決方案中，輪輻2 8 及28b對中間平面22右 不同的傾斜角度，即咅味這此 有 4+ 心 輪輻受到往復地不同張力。 特別疋，輪輻2 8 a之張力必須實 具貝上尚於輪輻28b之 ，以使輪圈20被保持對後輪18 張力 too 之中間平面22成中央。輪M240364 新型 Description of new type: [Technical field to which new type belongs] The present invention relates to a pedal wheel provided with spokes. More specifically, the present invention relates to a bicycle wheel having a pedal, including a rim, a hub, first and second fixing portions of a spoke, and a plurality of spokes connecting the hub to the wheel. The spokes are divided into first and second groups according to whether their inner ends are fixed to the first or second fixed portions of the spokes. [Prior Art] The technical problem underlying the present invention is that in some applications, the first and second sets of spokes are subjected to different stresses. As a result, in use, the spokes of one group are more at risk of breaking than the spokes of another group of the same wheel. The first solution to this problem is shown in Figure 1 of the accompanying drawings. This figure shows a known type rear wheel fitted on a bicycle frame 10 having two front fork arms 12, and a housing 14 is provided at the lower end thereof for locking the pin forming the lateral shaft 16. The rear wheel 18 includes a rim 20, and an intermediate flat surface 22 of the rear wheel 18 at the center of the pair of arms 12, and a fixed shell 14 of the skeleton 10. The rear wheel 18 includes a hub 24 and first and second spoke fixing portions 24a and 24b, respectively. The rim 20 and the hub 24 are connected by first and second sets of spokes 28a and 28b, respectively. The first set of spokes 28a is fixed to the portion 24a of the hub 24 adjoining the sprocket set 26, and the second set of spokes 28b is fixed to the portion 24b of the hub 24 on the side farthest from the sprocket set 26. Due to the volume of the sprocket set 26 in the direction of the horizontal axis 16, the spokes 28a3 and 28b have different inclination to the middle plane 22 of the rear wheel 18. In the figure, the inclination of the spokes 28a and 28b to the middle brother 1 ^ is the difference between α and ', ..., respectively, which is proportional to the axial volume of the sprocket stage%. In other words, the spokes 28a are slightly inclined due to the adjacent spokes. < Average angle of angle αρ α2 In the traditional solution, the spokes 2 8 and 28 b are inclined to the right of the middle plane 22 at different angles, which means that there are 4+ cores. The spokes are subject to reciprocating tension. In particular, the tension of the spokes 2 8 a must be substantially higher than that of the spokes 28 b so that the rim 20 is kept centered on the middle plane 22 of which the tension of the rear wheel 18 is too high. wheel
輻28a及28b之平均張力為F , 及Fb，這些力量在平行於 輪子轉軸之方向上之分量，必領 、 々可確保輪圈20對中間平 22為正確的中央定位。 了 T間十面 結果，在此已知解決方案 、甲，位於輪子右手側（靠近 鏈輪組）之輪子的輪輻，受到位 ,y 於輪子左手側（對向於鏈輪 組之側）之較高張力的作用。 哎祝 在其他型式之應用中，位 、輪子左手側之輪輻，比位 於輪子右手側之輪輻會受到較离 又】权巧之破斷風險。此倩況之一 個例子由馬維克氏敘述在文件EP-A-〇896887之中。此文 件敘述一種腳踏車後輪，其中位於鏈輪側之輪輻主要配置 在對輪子轉軸為直徑之方向上，並且輪輻為傾斜且交又。 以此種配置時，如傳統解決方案一般，腳踏車使用時，由 鏈輪所傳遞到輪圈之驅動轉矩幾乎全部傳遞鈿傾斜之輪輻 M240364 ，這是認為配置在徑向之輪輻並非主要傳遞轉矩之用。故， 在此種輪子中，配置在鏈輪組之對向側之輪輻大部份會受 到破斷之風險。 【新型内容】 本發明之目的在提供一種設有輪輻之腳踏車輪子，它 可克服這些問題。 依照本發明，此目的可由特徵被敘述於本發明申請專 利範圍中的設有輪輻之腳踏車輪子所達成。 【實施方式】 在第2及3圖中，對應於上述之元件以相同符號表 示。 本發明之輪子18中，第一組輪輻28a之數目比第二 組之輪輻28b之數目高。在圖中所示之實施例中，輪輻28a 之數目為第二組輪輻 28b之數目的兩倍。較佳為，輪輻 2 8a，28b被群組化成多個交互地等距之三個一組30。每個 三個一組30包括有第一組中之兩個輪輻28a，及第二組中 被配置在各第一組中之兩個輪輻2 8 a之間之一個輪輻2 8 b 每個三個一組3 0之輪輻2 8 a較佳為個別平行，並且三個一 組30之輪輻28b位於徑向平面上，它對輪輻28a為等距。 輪輻28a，2 8b固定到輪轂24及輪圈20之方法可為任何形 式。如第2圖所示，輪子1 8從美學上之觀點被設計成設有 M240364 輪輻之輪子，其中每一個〃輪輻〃包括有輪輻之三個一組 3 0。輪輻之三個一組3 0之數目可隨第2圖所示之實施例形 式而變。例如，具有5，6，7，8，9或1 0個輪輻之三個一組的 輪子，可包括輪輻總數分別為15,18,21，24,27及30。 依照本發明第1實施例形式之解決方案，主要使輪輻 2 8 a之張力對第二組之輪輻2 8 b為減半，因而相當地減少 鄰近於鏈輪組之輪輻產生破斷之危險，此在第1實施例之 形式中，本來是有相當的破斷危險存在。 第4到7圖顯示本發明輪子第2實施例形式，相當於 上述之元件亦以相同符號表示。特別地，如前述實施例形 式，固定到輪穀24之側24a的輪輻為28a，而固定到輪轂 24之側24b的輪輻為28b。如下列說明而將明顯地顯示， 在此第2實施例形式中，最受到破斷威脅之輪輻為配置在 左手側者。 在此第2實施例形式中，每一個第一組輪輻2 8 a位於 與輪轂24之軸16交叉之平面中。故，沿著轉軸16之平行 方向看去時，如第5圖所示，第一組之輪轄28a為垂直於 轉軸1 6。 每一個第二組輪輻28b，沿著轉軸20之平行方向看 去時，對輪圈2 0之直徑方向成傾斜。在此，名詞〃傾斜〃 為表示輪輻並不位於含有轉軸16之平面中。 舉含有轉軸16及一個輪輻28a之平面做為參考，同 一三個一組3 0之每一個輪輻2 8b可為平行於此平面，或傾 M240364 斜於此平面。 較 發 每 輻 // 在 圖 又 J 轉 組 組 並 有 動 之 軸 施 依照此第2實施例形式，第二組之輪輻2 8b之數目 高，較佳為它是第一組輪輻2 8 a之數目之兩倍。依照本 明之輪子的輪輻28a，28b較佳為配置成等距之群組30。 一個群組包括第二組之兩個輪輻2 8b及第一組之一個輪 28a，被配置在對同一群組之輪輻2 8b成中央位置上。 輪輻之群組30將設有輪輻之輪子給予輪子18。此 輪輻〃之數目可從4到1 0，則輪輻總數可為1 2到3 0。 每一個〃輪輻"3 0中，位於同側之兩個輪輻2 8b可為如 所示之交互地平行，或可為朝向輪圈2 0會聚。此自然地 參照到第1實施例形式。 在使用時，腳踏車騎士而施加一個力量在腳踏板上 此力量經由齒輪、鏈條及鏈輪被傳遞成施加到輪轂2 4之 軸16上之驅動轉矩。對轉軸16配置在直徑方向之第一 輪輻28a主要上並無法傳遞轉矩到輪圈20。故，由鏈輪 2 6施加到輪轂2 4之驅動轉矩會施加在扭力在轂體上， 且由第二組之輪輻28b傳遞到輪圈20。對於傳統輪子具 相同數目之輪輻時，依照本發明之解決方案，使傳遞驅 轉矩之輪輻會增加，此由於轉矩之傳遞而可滅少輪輻上 應力，並且滅少.輪輻破斷之危險。 三個一組中之輪輻28a，28b的配置特別有利，因為 向力局部地平衡（與輪子之轉軸成平行的方向）且由輪輻 加到輪圈2 0。 M240364 不論此文中提到後輪，假若顯示在本文剛開始時提到 之技術問題存在時，本發明之解決方案亦可被應用到前輪 【圖式簡單說明】 本發明將由下列非限制性例子之詳細說明，參照其附 圖解釋之，其中： 第1圖，如上述，是配合在腳踏車骨架上之後輪的局 部軸向橫剖面圖； 第2圖是本發明輪子第一形式實施例之立體圖； 第3圖是本發明輪子之局部立體圖； 第4圖是本發明輪子之第二形式實施例之立體圖； 第5圖是依照第4圖之箭頭V之側面圖； 第6圖是第4圖中之箭頭VI所示之部份的較大比例 之立體圖； 第7圖是第4圖中之箭頭VII所示之正面圖。 【元件代表符號簡單說明】 10 骨架 12 前叉臂 14 外殼 16 轉軸 18 輪子 M240364 20 輪圈 22 中間平面 2 4 輪轂 24a，24b 側 2 6 鏈輪組 28a，28b 輪輻 30 三個一組 9The average tensions of the spokes 28a and 28b are F, and Fb. The components of these forces in a direction parallel to the axis of rotation of the wheel must lead to the correct central positioning of the rim 20 on the middle flat 22. In view of the ten-sided results between T, here is a known solution, A. The spokes of the wheel located on the right-hand side of the wheel (near the sprocket set) are positioned in the left-hand side of the wheel (opposite to the sprocket set). The effect of higher tension. Ouch, in other types of applications, the spokes on the left-hand side of the wheel will be more susceptible to breakage than the spokes on the right-hand side of the wheel. An example of this situation is described by Marvik in document EP-A-〇896887. This document describes the rear wheel of a bicycle, in which the spokes on the sprocket side are mainly arranged in the direction of the diameter of the wheel axis, and the spokes are inclined and intersecting. With this configuration, as with traditional solutions, when a bicycle is used, almost all the driving torque transmitted from the sprocket to the rim is transmitted. The inclined spokes M240364 are considered to be that the radial spokes are not the main transmission Moment of use. Therefore, in this type of wheel, most of the spokes arranged on the opposite side of the sprocket group will be subject to the risk of breaking. [New content] The object of the present invention is to provide a pedal wheel with spokes, which can overcome these problems. According to the present invention, this object can be achieved by a bicycle wheel with spokes whose features are described in the patentable scope of the present application. [Embodiment] In Figs. 2 and 3, elements corresponding to the above are indicated by the same symbols. In the wheel 18 of the present invention, the number of spokes 28a of the first group is higher than the number of spokes 28b of the second group. In the embodiment shown in the figure, the number of spokes 28a is twice the number of the second set of spokes 28b. Preferably, the spokes 2 8a, 28b are grouped into a plurality of three sets 30 which are equally spaced interactively. Each of the three groups 30 includes two spokes 28a in the first group, and one of the spokes 2 8 a in the second group disposed between the two spokes 2 8 a in each of the first groups. A group of 30 spokes 2 8 a is preferably individually parallel, and a group of 30 spokes 28 b are located on a radial plane, which is equidistant from the spokes 28 a. The method of fixing the spokes 28a, 28b to the hub 24 and the rim 20 may be of any form. As shown in Fig. 2, the wheels 18 are designed from the aesthetic point of view to be provided with M240364 spoke wheels, each of which includes three groups of three spokes. The number of three-by-three groups of three spokes may vary depending on the embodiment shown in FIG. For example, a wheel having a set of 5, 6, 7, 8, 9, or 10 spokes may include a total of 15, 18, 21, 24, 27, and 30 spokes, respectively. The solution according to the form of the first embodiment of the present invention mainly reduces the tension of the spokes 2 8 a to the spokes 2 2 b of the second group by half, thereby considerably reducing the risk of breaking the spokes adjacent to the sprocket group. In the form of the first embodiment, there is a considerable risk of breaking. Figures 4 to 7 show the form of the second embodiment of the wheel of the present invention, and the elements corresponding to the above are also indicated by the same symbols. In particular, as in the previous embodiment, the spokes fixed to the side 24a of the wheel valley 24 are 28a, and the spokes fixed to the side 24b of the wheel hub 24 are 28b. As will be apparent from the following description, in this second embodiment form, the spokes most threatened by breaking are arranged on the left-hand side. In this second embodiment form, each of the first set of spokes 2 8 a lies in a plane that intersects the axis 16 of the hub 24. Therefore, when viewed along the parallel direction of the rotation axis 16, as shown in FIG. 5, the wheel set 28a of the first group is perpendicular to the rotation axis 16. Each of the second group of spokes 28b is inclined with respect to the diameter direction of the rim 20 when viewed along the parallel direction of the rotating shaft 20. Here, the term “tilt” means that the spokes do not lie in a plane containing the shaft 16. Taking the plane containing the shaft 16 and a spoke 28a as a reference, each of the spokes 2 8b in the same group of 30 may be parallel to this plane or inclined M240364 inclined to this plane. The number of spokes in the second group is in accordance with the form of this second embodiment. The number of spokes 2 8b in the second group is higher, and it is preferably the first group of spokes 2 8 a. Double the number. The spokes 28a, 28b of a wheel according to the present invention are preferably arranged in equidistant groups 30. One group includes two spokes 2 8b of the second group and one wheel 28a of the first group, and is arranged at a center position with respect to the spokes 2 8b of the same group. The group of spokes 30 gives wheels 18 provided with spokes. The number of spokes can be from 4 to 10, and the total number of spokes can be 12 to 30. In each 〃 spoke " 3 0, the two spokes 2 8b located on the same side may be alternately parallel as shown, or may converge toward the rim 20. This naturally refers to the form of the first embodiment. In use, the bicyclist applies a force to the pedals. This force is transmitted to the drive torque applied to the shaft 16 of the hub 24 via gears, chains and sprocket wheels. The counter-rotating shaft 16 is mainly arranged on the first spoke 28a in the diameter direction and cannot transmit torque to the rim 20. Therefore, the driving torque applied to the hub 24 by the sprocket 26 is applied to the hub body, and is transmitted to the rim 20 by the spokes 28b of the second group. For traditional wheels with the same number of spokes, according to the solution of the present invention, the spokes that transmit the drive torque will increase. This can reduce the stress on the spokes due to the transmission of torque, and less. The danger of spokes breaking . The arrangement of the spokes 28a, 28b in a set of three is particularly advantageous because the directional force is locally balanced (parallel to the axis of rotation of the wheel) and is added to the rim 20 by the spokes. M240364 Regardless of the rear wheel mentioned in this article, if the technical problems mentioned at the beginning of this article are shown, the solution of the present invention can also be applied to the front wheel. [Schematic description] The present invention will be based on the following non-limiting examples Detailed description is explained with reference to the accompanying drawings, wherein: FIG. 1 is a partial axial cross-sectional view of a rear wheel fitted on a bicycle frame as described above; FIG. 2 is a perspective view of a first embodiment of a wheel of the present invention; Fig. 3 is a partial perspective view of a wheel of the present invention; Fig. 4 is a perspective view of a second form embodiment of a wheel of the present invention; Fig. 5 is a side view according to arrow V of Fig. 4; Fig. 6 is a view of Fig. 4 A larger scale perspective view of the portion shown by arrow VI; Figure 7 is a front view shown by arrow VII in Figure 4. [Simplified description of component representative symbols] 10 skeleton 12 front fork arm 14 housing 16 rotating shaft 18 wheel M240364 20 rim 22 middle plane 2 4 hub 24a, 24b side 2 6 sprocket set 28a, 28b spoke 30 set of 3 9