201210889 六、發明說明： 【發明所屬之技術領域】 [0001] 本發明有關一種自行車，更特別係，有關一種可使兩側 輪轂齒輪以每分鐘相同旋轉來同時旋轉的輪轂，使得左 與右踏板可持續驅動之自行車，其中，一踏板軸係分成 右與左部件。 【先前彳支4标】 [0002] 請即參考圖1，一自行車通常包括一使用鏈條的動力傳輸 單元（100)。自行車騎士轉動踏板時，一踏板齒輪的旋轉 力可透過鏈條傳輸給後輪的一輪轂齒輪，且前輪會連同 後輪旋轉，使自行車向前推進。 [0003] 動力傳輸單元（100)現將參考圖2描述。動力傳輸單元 (100)包括一整合踏板組（113)，其中，相對踏板（112) 耦合至一單踏板軸（111); 一踏板齒輪（114)，其連接至 踏板軸（111); 一輪轂（120)，一後輪軸經由其穿過，且 連接後輪的輪輻，一輪轂齒輪（130)，其耦合至輪轂 (120);及一鏈條（140)，用於動力傳輸。同樣地，一典 型自行車包括在相對側配置的兩踏板，且直接連接至一 單踏板軸（111)。 [0004] 圖3示意說明一傳統自行車的組裝輪轂（120)，圖4為輪轂 (120) 的分解透視圖，且圖5為輪轂（120)的詳細分解透 視圖。 [0005] 請即參考圖3與4，輪轂（120)通常包括：一輪轂殼體 (122)，其中，連接一後輪的輪輻，且一輪轂固定軸 (121) 經由其穿過；一棘輪（130)，其轉緊固定至輪轂殼 100130728 表單編號 A0101 第 4 頁/共 20 頁 1003436458-0 201210889 其固定輪轂殼體 體（122)的一側；及一錐形螺帽（124)， (122)至輪轂固定轴（121)。 [0006] 此外，棘輪（130)包括：一桿輪（131)，其外周圍有一桿 (132); —鏈輪（133)，其具有在内周圍形成的一稈齒輪 (133a)，並咬合桿（132)作單向傳輸動力；及一鏈齒 (133b)，其在外周圍形成並咬合鏈條；及一輪罩（134) ，其在極輪（131)安裝在鏈輪（133)後會固定桿輪（131) 與鏈輪（133)。 [0007] 此一傳統自行車時常會發生脫離齒輪或斷鏈現像，因此 在鏈條傳輸旋轉力過程會發生故障、與能量損失。 [0008] 由於踏板齒輪配置在自行車的一侧，所以傳統自行車在 一踏板齒輪與一輪毅齒輪間存在一較長的動力傳輸路徑 。因此，在旋轉力傳輸通過鏈條時，能量損失會發生。 [0009] 此外，鏈條時常與齒輪或切削分離，因此時常發生故障 〇 [0010] 而且，由於一對踏板耦合至一單踏板齒輪，所以一踏板 軸必須配置在後輪的半徑内。 【發明内容】 [0011] 技術問題 [0012] 本發明針對解決相關技術的問題，且本發明的一態樣是 要提供自行車具有輪轂以使相對侧的輪轂齒輪能每分鐘 相同旋轉來同時轉動，因此可使用分成右與左部件之一 踏板軸以持續驅動右與左踏板。 100130728 表單編號A0101 第5頁/共20頁 1003436458-0 201210889 [0013] 技術解決方案 [0014] 根據本發明之一態樣，一自行車包括：一輪轂，可在自 行車的兩側傳輸動力，其中，該輪轂包括一旋轉軸，該 旋轉軸包括至少一桿（配置在外周圍）與一對輪轂齒輪（其 耦合至或整個在兩侧形成）；及一輪轂殼體，旋轉軸會經 由其通過，且連接一後輪的輪輻。該輪轂殼體包括一稈 齒輪，其係在内周圍形成，並咬合該桿以動力傳輸，使 得該對輪轂齒輪能每分鐘相同旋轉來同時轉動。 [0015] 該自行車可包括：一對踏板齒輪，其配置在一車骨架的 兩側；一對踏板，其耦合至該等踏板齒輪；及一對動力 傳輸單元，分別傳輸該等踏板齒輪的旋轉力至輪轂齒輪 〇 [0016] 該動力傳輸單元可包括至少一惰齒輪，其配置在該踏板 齒輪與該輪轂齒輪之間。 [0017] 該動力傳輸單元可包括一鏈條。 [0018] 該踏板軸可配置在後輪的半徑内。 [0019] 有利效果 [0020] 根據本發明的示範性具體實施例，自行車包括在一後輪 相對侧的踏板齒輪與輪轂齒輪，且藉由轉動齒輪來驅動 〇 [0021] 因此，一踏板軸分成右與左部件，且配置靠近後輪，藉 此改善動力傳輸效能。 [0022] 特別係，由於在自行車相對侧的輪轂齒輪是以每分鐘相 100130728 表單編號A0101 第6頁/共20頁 1003436458-0 201210889 [0023] [0024] 〇 [0025] [0026] ❹ [0027] 同旋轉來同時轉動，所以即使踏板齒輪分別提供在右與 左側，右與左踏板仍可持續驅動。 此外，該自行車的長度比傳統自行車更短，因此減輕重 量，藉此使維護與運輸更方便。 【實施方式】 現將參考附圖詳細描述本發明的示範性具體實施例。鹿 明白，下列具體實施例只是說明，而不是以任何方式坶 本發明構成限制D 請即參考圖6至8，根據本發明之示範性具體實施例的自 行車包括一前輪、一後輪、一車骨架、一座墊、及一動 力傳輸單元（1 )。 動力傳輸單元（1)包括—踏板組（1〇)，該踏板組包括.— 對踏板（12) ’分別提供給後輪的右與左側；及一對轉板 齒輪（20)，其轉耦合至一踏板轴（11); 一對輪轂齒輪 (30)，其固定至後輪的一中心軸（輪轂固定軸）（61);及 一對惰齒輪（40)，其每一惰齒輪配置在踏板齒輪（2〇)與 輪轂齒輪（30)之間，使得踏板齒輪（20)與輪轂齒輪（3〇) 可在相同方向轉動。 惰齒輪（4 0)之每一者是在齒輪牙的相對侧上的側壁形成 。惰齒輪（40)會咬合在侧壁中的對應踏板齒輪（2〇)、戈 對應輪轂齒輪（30)。侧壁係提供來避免踏板齒輪（2〇)、 惰齒輪（40)、與輪轂齒輪（3〇)彼此失去咬合，藉此確保 其間穩定咬合。或者，雖然未在圖顯示，但側壁是在踏 板齒輪與輪較齒輪的齒輪牙的相對侧上形成，而不是在 100130728 表單編號Α0101 第7頁/共20頁 1003436458-0 201210889 N齒輪形成，藉此提供相同的效果。 剛惰絲（4〇)之每-者伽定在車骨架的中 [0029] [0030] 隨者此構造’當推動踏板12之一時，對應的踏板齒輪 2〇)會轉動，且踏板齒輪（2G)的旋轉力會經由惰齒輪 (4〇)與輪較齒輪（30)傳輸給後輪，藉此轉動後輪。 明確地係’在此具體實施例中’踏板軸⑴在踏板齒輪 的中心）安襄在後輪的半徑内。通常知道，踏板袖（⑴較 靠近配置在後輪的中心、，更快回應改善動力傳輸效能。 根據本發明，由於踏板軸⑴）分成右與左部件，所以踏 板軸（11)可安裝較靠近後輪的中心。因此，動力傳輸距 離會明顯減少，藉此減少動力損失。 [〇〇31]根據此具體實施例，推動右與左踏板（12)時，旋轉力會 傳輸至分別配置在自行車相對側的輪轂齒輪（30)。因此 ，為了要移動根據此具體實施例的自行車，對於輪轂使 後輪轉動就很重要，而允許在自行車相對侧的踏板（12) 轉動產生的旋轉力互補工作，但不是彼此碰撞。特別係 ’由於輪轂齒輪（3〇)分別提供給後輪的左與右側，所以 輪較構造允許輪轂齒輪（30)以每分鐘相同旋轉來轉動。 當兩輪轂齒輪（30)的每分鐘旋轉彼此不符時，右與左踏 板（1 2 )不會持續交替推動。例如’輪數係構造成’當推 動左踏板（12)時，允許左與右輪轂齒輪（30)以每分鐘相 同旋轉來同時轉動。 [〇〇32] 圖9為示意說明根據本發明之具體實施例的一組裝輪轂 (60);圖10為輪轂（6〇)的分解透視圖；及圖11為輪轂 100130728 表單編號A0101 第8頁/共20頁 1003436458 201210889 (60)的詳細分解透視圖。請即參考圖9至11，根據具體實 施例的輪轂（60)包括一輪較固定軸（61)、一輪較殼體 (63)、與一旋轉軸（62)。 [0033] 輪轂殼體（63)包括：邊緣（63b)，其在相對側形成且連 接至後輪的輪輻（50);及一稈齒輪（63a)，其係在内周 圍上形成。 [0034] 旋轉轴（62)係貫穿輪轂殼體（63)，且包括在外周圍提# 的至少一桿（62c)。明確地係’該桿（62c)係配置在旋轉 〇 軸（62)的外周圍上形成的座槽（62b)中，且由_圓線彈 簧（62d)彈性支撐從槽凸出。該桿（62c)係咬合桿齒輪 (63a)以在一方向轉動該輪轂殼體（63)。 [0035] 旋轉轴（62)包括在相對側形成的邊緣（62a)，每—邊緣 係轉緊至每一輪轂齒輪（30)。因此，在後輪兩側的輪較 齒輪（30)可彼此同步轉動。此外，該對輪轂齒輪（3〇)可 與旋轉轴（62)的相對側整個形成。 q [〇〇36]當組裝旋轉軸（62)在輪轂殼體（63)時，邊緣（62a)之一 係與旋轉軸（62)分開，且另一邊緣係輕合至其，藉此更 容易透過輪穀殼體（63)組裝旋轉軸（62)。 [0037] 此外，固定在自行車骨架的輪轂固定轴（61)係插入旋轉 轴（62)，且輪轂（60)更包括一錐形螺帽（64)，以固定旋 轉袖（62)至輪較固定轴（61)。 [0038] 為了促進旋轉，軸承（B)提供在旋轉軸（62)與輪轂殼體 (63)之間、及在旋轉軸（62)與錐形螺帽（64)之間。 100130728 表單编號A0101 第9頁/共20頁 1003436458-0 201210889 [0039] 輪 叫11，马了驅動輪轂殼體（63)，耦合在輪轂齒 〇)的旋轉轴（62)係配置在輪較殼體（63)與輪毅固定 釉C 61)之間. ’ 兩輪轂齒輪（30)能以每分鐘相同旋 二：時轉動。因此，自行車右與左側的踏板齒輪亦】 2鐘相同旋轉來轉動，且在相對側的踏板（12)彼此 度配置，藉此使自行車騎士推動踏板。 以 以 [0040] 1 田使用個別配置在自行車右與左側沒有鏈條的 齒輪來驅會 盯車時’根據本發明之具體實施例的自行 °使用較少數目齒輪作為動力傳輸效能。此外，自行 八^括動力傳輸單元⑴，其具輪轂（60) ，構造上能以每 同旋轉’使配置在自行車兩側的齒論轉動以驅 自行車。 3、者複數個惰齒輪可提供。即是，奇數惰齒輪可提供 使得踏板齒輪與輪轂齒輪能以相同方向轉動。或者， 數隋齒輪可提供，使得踏板齒輪與輪轂齒輪能以相對 向轉動’且後輪然後透過傳輪與踏板齒輪相同方向轉 [酬圖12不意說明根據本發明之另_具體實施例的自行車。 相較於圖7所示的具體實施例’鍵條（7〇)提供作為動力傳 輸單兀，而不是圖7的惰齒輪（4〇)。根據本發明，由於踏 板轴（11)分成配置在相對側的兩部件，所以踏板軸 可安裝較靠近後輪的中心，使得可使用較短的鏈條。 【圖式簡單說明】 [〇〇43]本發明的上述及其他態樣、特徵與優點可從下面連同私 圖的不範性具體實施例詳細描述而更清楚瞭解，其 5 表單編號A0101 第丨〇頁/共2〇頁 、中· 1〇〇3436458~〇 20121您89m為一傳統自行車的側視圖; [0045] 圖2為傳統自行車的動力傳輸單元的示意透視圖； [0046] 圖3至5為傳統自行車輪轂的部份刮示透視圖； [0047] 圖6為根據本發明之一示範性具體實施例的自行車透視圖 > [0048] 圖7與8為圖6的自行車動力傳輸單元圖； [0049] 圖9至11為圖6的自行車輪轂側視圖；及 〇 [0050] 圖12為根據本發明之另一模範具體實施例的自行車部份 剖示透視圖。 [0051] 【主要元件符號說明】 B轴承 [0052] 1動力傳輸單元 [0053] 10踏板組 [0054] 〇 11踏板轴 [0055] 12踏板 [0056] 20踏板齒輪 [0057] 30輪較齒輪 [0058] 4 0惰齒輪 [0059] 50輪轄 [0060] 60輪轂 100130728 表單編號A0101 第11頁/共20頁 1003436458-0 201210889 [0061] 61 ] 除轂固定軸 [0062] 62 ； 淀轉轴 [0063] 62a 邊緣 [0064] 62b 座槽 [0065] 62c 桿 [0066] 62d 圓線彈簧 [0067] 63 輪轂殼體 [0068] 63a 稈齒輪 [0069] 63b 邊緣 [0070] 64 錐形螺帽 [0071] 70 鏈條 [0072] 100 動力傳輸單元 [0073] 111 單踏板轴 [0074] 112 踏板 [0075] 113 踏板組 [0076] 114 踏板齒輪 [0077] 120 輪轂 [0078] 121 輪轂固定軸 [0079] 122 輪轂殼體 100130728 表單編號A01G1 第12頁/共20頁 1003436458-0 201210889201210889 VI. Description of the Invention: [Technical Field] [0001] The present invention relates to a bicycle, and more particularly to a hub that allows both side hub gears to rotate simultaneously at the same rotation per minute, so that the left and right pedals A continuously driven bicycle in which a pedal shaft is divided into right and left parts. [Previous 彳 4 standard] [0002] Referring now to Figure 1, a bicycle typically includes a power transmission unit (100) that uses a chain. When the bicycle rider turns the pedal, the rotational force of a pedal gear can be transmitted through the chain to a hub gear of the rear wheel, and the front wheel rotates together with the rear wheel to advance the bicycle. [0003] The power transmission unit (100) will now be described with reference to FIG. 2. The power transmission unit (100) includes an integrated pedal set (113), wherein the opposite pedal (112) is coupled to a single pedal shaft (111); a pedal gear (114) coupled to the pedal shaft (111); a hub (120), through which a rear axle passes and connects the spokes of the rear wheel, a hub gear (130) coupled to the hub (120), and a chain (140) for power transmission. Similarly, a typical bicycle includes two pedals disposed on opposite sides and is directly coupled to a single pedal shaft (111). 3 illustrates an assembled bicycle hub (120) of a conventional bicycle, FIG. 4 is an exploded perspective view of the hub (120), and FIG. 5 is a detailed exploded perspective view of the hub (120). Referring to Figures 3 and 4, the hub (120) generally includes a hub housing (122) in which a spoke of a rear wheel is coupled and a hub securing shaft (121) is passed therethrough; a ratchet (130), which is fastened to the hub shell 100130728 Form No. A0101 Page 4 of 20 1003436458-0 201210889 One side of the fixed hub shell body (122); and a conical nut (124), ( 122) to the hub fixed shaft (121). Further, the ratchet (130) includes: a rod wheel (131) having a rod (132) at its outer periphery; a sprocket (133) having a stalk gear (133a) formed at the inner periphery and engaging The rod (132) is a one-way transmission power; and a sprocket (133b) that forms and engages the chain around the outer circumference; and a wheel cover (134) that is fixed after the pole wheel (131) is mounted on the sprocket (133) Rod wheel (131) and sprocket (133). [0007] This conventional bicycle often happens to be out of gear or broken chain, so that failure and energy loss occur in the transmission of the rotational force of the chain. [0008] Since the pedal gear is disposed on one side of the bicycle, the conventional bicycle has a long power transmission path between a pedal gear and a wheel gear. Therefore, energy loss occurs when the rotational force is transmitted through the chain. [0009] Furthermore, the chain is often separated from the gear or the cutting, so that malfunctions often occur. [0010] Moreover, since a pair of pedals are coupled to a single pedal gear, a pedal shaft must be disposed within the radius of the rear wheel. SUMMARY OF THE INVENTION [0012] The present invention is directed to solving the problems of the related art, and an aspect of the present invention is to provide a bicycle having a hub such that the hub gears on opposite sides can rotate simultaneously at the same time to rotate at the same time, It is therefore possible to use a pedal shaft that is divided into one of the right and left parts to continuously drive the right and left pedals. 100130728 Form No. A0101 Page 5 of 20 1003436458-0 201210889 Technical Solution [0014] According to one aspect of the present invention, a bicycle includes: a hub that transmits power on both sides of the bicycle, wherein The hub includes a rotating shaft including at least one rod (disposed around the outer circumference) and a pair of hub gears (which are coupled to or formed integrally on both sides); and a hub housing through which the rotating shaft passes, and Connect the spokes of a rear wheel. The hub housing includes a stalk gear that is formed around the interior and that engages the rod for power transmission such that the pair of hub gears can rotate simultaneously at the same time per minute. [0015] The bicycle may include: a pair of pedal gears disposed on both sides of a vehicle frame; a pair of pedals coupled to the pedal gears; and a pair of power transmission units respectively transmitting rotations of the pedal gears Force to Hub Gear 〇 [0016] The power transmission unit may include at least one idle gear disposed between the pedal gear and the hub gear. [0017] The power transmission unit may include a chain. [0018] The pedal shaft can be disposed within the radius of the rear wheel. Advantageous Effects [0020] According to an exemplary embodiment of the present invention, a bicycle includes a pedal gear and a hub gear on an opposite side of a rear wheel, and is driven by rotating a gear [0021] Therefore, a pedal shaft is divided into Right and left parts, and configured close to the rear wheel, thereby improving power transmission efficiency. [0022] In particular, since the hub gear on the opposite side of the bicycle is 100130728 per minute Form No. A0101 Page 6 / Total 20 pages 1003436458-0 201210889 [0023] [0024] 〇 [0025] [0026] ❹ [0027 ] Rotate at the same time as the rotation, so even if the pedal gears are provided on the right and left sides respectively, the right and left pedals can continue to drive. In addition, the bicycle is shorter in length than conventional bicycles, thus reducing weight, thereby making maintenance and transportation more convenient. [Embodiment] Exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. The deer understands that the following specific embodiments are merely illustrative, and not in any way, the present invention constitutes a limitation. Please refer to FIGS. 6 to 8. The bicycle according to an exemplary embodiment of the present invention includes a front wheel, a rear wheel, and a car. A skeleton, a mat, and a power transmission unit (1). The power transmission unit (1) includes a pedal group (1〇), the pedal group includes: - a pedal (12) 'provided to the right and left sides of the rear wheel, respectively; and a pair of plate gears (20), which are coupled to each other To a pedal shaft (11); a pair of hub gears (30) fixed to a central shaft (hub fixed shaft) (61) of the rear wheel; and a pair of idle gears (40) each of which is disposed at Between the pedal gear (2〇) and the hub gear (30), the pedal gear (20) and the hub gear (3〇) can be rotated in the same direction. Each of the idler gears (40) is formed on a side wall on the opposite side of the gear teeth. The idler gear (40) will engage the corresponding pedal gear (2〇) in the side wall, and the corresponding hub gear (30). The side wall is provided to prevent the pedal gear (2〇), the idle gear (40), and the hub gear (3〇) from losing each other, thereby ensuring a stable engagement therebetween. Or, although not shown in the figure, the side wall is formed on the opposite side of the gear teeth of the pedal gear and the wheel gear, instead of the 100130728 form number Α0101 page 7 / total 20 pages 1003436458-0 201210889 N gear formation, borrow This provides the same effect. Each of the just-insulated wires (4〇) is set in the frame of the car [0029] [0030] With this configuration, when one of the pedals 12 is pushed, the corresponding pedal gear 2〇 is rotated, and the pedal gear ( The rotational force of 2G) is transmitted to the rear wheel via the idle gear (4〇) and the wheel gear (30), thereby rotating the rear wheel. Specifically, in this embodiment, the pedal shaft (1) is mounted in the radius of the rear wheel at the center of the pedal gear. It is generally known that the pedal sleeve ((1) is closer to the center of the rear wheel, and responds faster to improve power transmission performance. According to the present invention, since the pedal shaft (1) is divided into right and left members, the pedal shaft (11) can be installed closer. The center of the rear wheel. Therefore, the power transmission distance is significantly reduced, thereby reducing power loss. [〇〇31] According to this embodiment, when the right and left pedals (12) are pushed, the rotational force is transmitted to the hub gears (30) respectively disposed on the opposite sides of the bicycle. Therefore, in order to move the bicycle according to this embodiment, it is important for the hub to rotate the rear wheels, while the rotational forces generated by the rotation of the pedals (12) on the opposite side of the bicycle work complementarily, but do not collide with each other. In particular, since the hub gears (3 turns) are respectively supplied to the left and right sides of the rear wheels, the wheel configuration allows the hub gears (30) to rotate at the same rotation per minute. When the rotations of the two hub gears (30) do not match each other, the right and left pedals (12) do not continue to alternately push. For example, the number of rounds is configured to allow the left and right hub gears (30) to rotate simultaneously with the same rotation per minute when the left pedal (12) is pushed. Figure 9 is an exploded perspective view schematically showing an assembly hub (60) according to a specific embodiment of the present invention; Figure 10 is an exploded perspective view of the hub (6〇); and Figure 11 is a hub 100130728 Form No. A0101 Page 8 / A total of 20 pages of 1003436458 201210889 (60) detailed exploded perspective. Referring to Figures 9 through 11, a hub (60) according to a particular embodiment includes a relatively fixed axle (61), a wheeled housing (63), and a rotating shaft (62). The hub housing (63) includes an edge (63b) formed on the opposite side and connected to the spoke (50) of the rear wheel; and a stalk gear (63a) formed on the inner circumference. [0034] The rotating shaft (62) extends through the hub housing (63) and includes at least one rod (62c) that is raised around the outer circumference. Specifically, the rod (62c) is disposed in a seat groove (62b) formed on the outer periphery of the rotary cymbal shaft (62), and is elastically supported by the _ round wire spring (62d) to protrude from the groove. The lever (62c) is a snap lever gear (63a) that rotates the hub housing (63) in one direction. [0035] The rotating shaft (62) includes edges (62a) formed on opposite sides, each edge being fastened to each hub gear (30). Therefore, the wheel gears (30) on both sides of the rear wheel can rotate in synchronization with each other. Further, the pair of hub gears (3 turns) may be integrally formed with the opposite sides of the rotating shaft (62). q [〇〇36] When the rotating shaft (62) is assembled in the hub shell (63), one of the edges (62a) is separated from the rotating shaft (62), and the other edge is lightly coupled thereto, thereby It is easy to assemble the rotating shaft (62) through the wheel house (63). [0037] In addition, a hub fixing shaft (61) fixed to the bicycle frame is inserted into the rotating shaft (62), and the hub (60) further includes a tapered nut (64) for fixing the rotating sleeve (62) to the wheel. Fixed shaft (61). [0038] To facilitate rotation, the bearing (B) is provided between the rotating shaft (62) and the hub housing (63), and between the rotating shaft (62) and the tapered nut (64). 100130728 Form No. A0101 Page 9 of 20 1003436458-0 201210889 [0039] The wheel is called 11 and the drive hub housing (63) is coupled to the hub of the hub (62). Between the housing (63) and the wheel-fixing glaze C 61). The two-wheel hub gear (30) can be rotated twice per minute. Therefore, the pedal gears of the right and left sides of the bicycle are also rotated by the same rotation for 2 minutes, and the pedals (12) on the opposite sides are arranged to each other, thereby causing the bicycle rider to push the pedal. In the case where the vehicle is individually driven with a gear having no chain on the right and left sides of the bicycle, the vehicle according to a specific embodiment of the present invention uses a smaller number of gears as the power transmission performance. In addition, the power transmission unit (1) has a hub (60) that is configured to rotate the teeth disposed on both sides of the bicycle with each rotation to drive the bicycle. 3. A plurality of idler gears are available. That is, the odd idle gear can be provided to enable the pedal gear and the hub gear to rotate in the same direction. Alternatively, the plurality of gears may be provided such that the pedal gear and the hub gear can be rotated in opposite directions and the rear wheel and then the transmission wheel are rotated in the same direction as the pedal gear. FIG. 12 is not intended to illustrate a bicycle according to another embodiment of the present invention. . The key strip (7〇) is provided as a power transmission unit as compared to the specific embodiment shown in Fig. 7, instead of the idle gear (4〇) of Fig. 7. According to the present invention, since the pedal shaft (11) is divided into two members disposed on the opposite sides, the pedal shaft can be mounted closer to the center of the rear wheel, so that a shorter chain can be used. BRIEF DESCRIPTION OF THE DRAWINGS [0039] The above and other aspects, features, and advantages of the present invention will be more apparent from the following detailed description of the embodiments of the invention. 〇 / 共 436 436 436 436 436 436 436 436 436 436 436 436 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 5 is a partially-scratched perspective view of a conventional bicycle hub; [0047] FIG. 6 is a perspective view of a bicycle according to an exemplary embodiment of the present invention. [0048] FIGS. 7 and 8 are bicycle power transmission units of FIG. 9 to 11 are side views of the bicycle hub of FIG. 6; and FIG. 12 is a partially cutaway perspective view of the bicycle according to another exemplary embodiment of the present invention. [0049] FIG. [Main component symbol description] B bearing [0052] 1 power transmission unit [0053] 10 pedal group [0054] 〇 11 pedal shaft [0055] 12 pedal [0056] 20 pedal gear [0057] 30 wheel comparison gear [ 0058] 4 0 idle gear [0059] 50 rounds [0060] 60 hub 100130728 Form No. A0101 Page 11 / Total 20 pages 1003436458-0 201210889 [0061] 61 ] In addition to the hub fixed shaft [0062] 62 ; 0063] 62a Edge [0064] 62b Seat Slot [0065] 62c Rod [0066] 62d Round Spring [0067] 63 Hub Housing [0068] 63a Stalk Gear [0069] 63b Edge [0070] 64 Conical Nut [0071 70 chain [0072] 100 power transmission unit [0073] 111 single pedal shaft [0074] 112 pedal [0075] 113 pedal group [0076] 114 pedal gear [0077] 120 hub [0078] 121 hub fixed shaft [0079] 122 Hub housing 100130728 Form number A01G1 Page 12 of 20 Page 1003436458-0 201210889
LU_JLU_J
[0081] [0082] [0083] [0084] [0085] [0086][0084] [0084] [0084] [0086]
[0087] [0088] 124錐形螺帽 130輪轂齒輪 131桿輪 132桿 134輪罩 133鏈輪 133a稈齒輪 133b鏈齒 140鏈條[0088] 124 Conical Nuts 130 Hub Gears 131 Rods 132 Rods 134 Wheel Covers 133 Sprockets 133a Straw Gears 133b Chains 140 Chains
100130728 表單編號A0101 第13頁/共20頁 1003436458-0100130728 Form No. A0101 Page 13 of 20 1003436458-0