201219261 、發明說明： 【發明所屬之技術領域】 本發明係關於一種用於一無鏈自行車的齒輪傳動 敦置。更具體地’本發明係關於一種無鏈自行車之齒輪 傳動裝置’其中該齒輪傳動裝置包括一驅動組件，其與 轉板交互連動且具有同心設置之不同齒數的複數個傘 齒輪’以及一受驅動組件，其具有嚙合於該些驅動傘齒 輪的複數個受驅動傘齒輪以及一連接於後輪的受驅動 輪’其中藉由結合於受驅動軸的滑移構件的運作而選擇 性地扣合受驅動傘齒輪以調節齒輪傳動等級。 【先前技術】 一般而言，自行車之類的一運輸工具，是利用自踏 板所供應的驅動力而移動。自踏板所供應的驅動力通過 鍵條而傳動至後輪。然而，在具有這種結構的自行車 中’鏈條可能會在力傳動過程中反覆地放鬆，因此可能 會使力傳動效率減損。在極端的情況中，鏈條可能會脫 離自行車。 為解決上述問題，本發明的申請人已提出申請了一 件名稱為”自行車之驅動裝置（driving apparatus for bicycle) ”的專利申請案（韓國未審定專利公開號 Ui-2004-0026785)。 另外，本發明的申請人也已提出申請了一件名稱 為”齒輪傳動裝置（gear transmission apparatus)” 的專 利申請案（韓國註冊專利公告號10-0688611 ’在下文 中，稱為關聯技術])，其係用於自行車以減少在力傳動 過程中的力損失以及藉由裝設一具有齒輪傳動功能的 受驅動組件與一具有不同齒數的同心設置的複數個驅 201219261 動傘齒輪的驅動組件而使構件數最小化。 如圖1所示，關聯技術1的齒輪傳動裝置包括一受 驅動組件22，其中沿著受驅動軸22a移動的插銷22b 與形成在受驅動軸22a所支樓的受驅動傘齒輪中的槽 口組配及分離，藉此達成齒輪傳動。 然而，這種插銷22b的移動是由使用者的手所造成 的。 因此，為了執行齒輪傳動以使與驅動傘齒輪嚙合的 受驅動傘齒輪22b可以與受驅動軸22a —同轉動，需要 大的力量。 作為其結果，當車輛在高速行駛時，亦即，驅動傘 齒輪以高速轉動時，齒輪傳動會變得困難。 為了解決上述問題，本發明的申請人已提出申請一 件名稱為”齒輪傳動裝置的受驅動組件（driven assembly of gear transmission apparatus)” 的專利申請 案（韓國註冊專利公告號10-0809845，在下文中，稱為 關聯技術2)。 根據關聯技術2，一滑移構件直接轉動一受驅動傘 齒輪或是一棘輪間接地轉動此受驅動傘齒輪而不阻礙 受驅動傘齒輪的轉動，如此一來即使在驅動傘齒輪於高 速轉動時，仍可以簡單地達成齒輪傳動。 關聯技術2作了相較於關聯技術1的技術拓展，但 尚需要有一種能精確地以一簡單結構執行齒輪傳動運 作的技術。 【發明内容】 本發明係用以解決發生在關聯技術中的問題，因此 本發明的一目的係為提供一種自行車之齒輪傳動裝 置，其中當滑移構件與受驅動軸在結合的狀態下前後地 201219261 2動:使二選擇性地扣合或釋放各受驅動傘齒 以容易Ϊ輪傳動4級可以容易控制、齒輪傳動運作可 改善齒4動裝置的結構可以簡化，藉此 其提&了實現上述目的，根據本發明的其中一實施例， i包—無鏈自行車之齒輪傳動裝置，此齒輪傳動骏 上，且^驅動組件，安裝在與一踏板交互連動的一曲柄 齒輪纟具有同心設置的複數個驅動傘齒輪、一受驅動傘 個受i件’包括與驅動組件的驅動伞齒輪相响合的複數 件^且^傘齒輪、一受驅動軸，裝設於受驅動傘齒輪組 伸的一择/、外表面上形成有沿著受驅動軸的長度方向延 離於成il 口、一滑移構件，嵌置在槽口中，且裝設或卸 件相傘齒輪組件、以及一傳動單元，依據滑移構 受驅動鉍欠驅動傘齒輪組件的裝設及卸離狀態，而控制 態‘。袖與受驅動傘齒輪組件之間成為扣合及釋放狀 ⑽一根據本發明的代表性實施例，受驅動軸包括一致動 t ’其驅使滑移構件執行—齒輪傳動運作。致動單元 匕心一軸承，結合於受驅動軸、一致動構件，環繞組配 於文驅動^、一彈簧’設置在軸承與致動構件之間、以 及一致動器，用以使致動構件在一前進方向上移動。 根據本發明的代表性實施例，傳動單元包括複數個 引導壁，形成在受驅動軸的外表面、複數個斜槽，形成 在此些引導壁之間的受驅動軸的外表面、一後置溝槽， 形成在此些斜槽與此些引導壁之間的受驅動轴的外表 面，以供滑移構件嵌置在嵌置溝槽中、以及複數個滾動 單元，安裝於此些斜槽且緊附或疏離於受驅動傘齒輪的 内侧表面。 201219261 根據本發明的代表性實施例，斜槽包括朝單一方向 傾斜的斜面，以及自斜面的端部延伸的垂直面，並且滾 動單元係安裝在斜面。 如上所述，根據本發明，滑移構件控制滚動單元在 滑移構件與受驅動軸結合的狀態下的位置，使其選擇性 地扣合或釋放各受驅動傘齒輪，如此使得齒輪傳動等級 可以容易控制、齒輪傳動運作可以容易執行、以及齒輪 傳動裝置的結構可以簡化，藉此改善齒輪傳動運作的可 靠度。 【實施方式】 在下文中，將參照隨附圖式詳細說明本發明代表性 的實施例。 圖2為一顯示配備有根據本發明的一齒輪傳動裝 置的一自行車的立體圖、圖3為一顯示根據本發明的無 鏈自行車之齒輪傳動裝置的立體圖、圖4為一顯示根據 本發明的無鏈自行車之齒輪傳動裝置的爆炸圖、圖5為 一顯示根據本發明的無鏈自行車之齒輪傳動裝置的受 驅動傘齒輪的前視圖、圖6為一顯示當齒輪傳動裝置於 高速模式時根據本發明的無鏈自行車之齒輪傳動裝置 的滑移構件的位置的立體圖、圖7為一顯示當齒輪傳動 裝置於高速模式時根據本發明的無鏈自行車之齒輪傳 動裝置的滑移構件的位置的側視剖面圖、圖8為一顯示 於高速模式下在第六受驅動傘齒輪中的滾動單元的位 置的前視圖、圖9為一顯示當齒輪傳動裝置於中速模式 時根據本發明的無鏈自行車之齒輪傳動裝置的滑移構 件的位置的立體圖、圖10為一顯示當齒輪傳動裝置於 中速模式時根據本發明的無鏈自行車之齒輪傳動裝置 的滑移構件的位置的側視剖面圖、圖1丨為一顯示於中 201219261 士 下在第三受驅動傘齒輪中的滚動單元的位置的 刚不見圖、PI 1 q a 根據本it闽η為一顯示當齒輪傳動裝置於低速模式時 ^位置ί明的無鏈自行車之齒輪傳動裝置的滑移構件 速模式1立體圖、圖13為一顯示當齒輪傳動裝置於低 滑移^Β根據本發明的無鏈自行車之齒輪傳動裝置的 速模 的位置的侧視剖面圖、及圖14為一顯示於低 下在第二受驅動傘齒輪中的滾動單元的位置的 月1J 障j 〇 輪傳動 至14所示，根據本發明的無鏈自行車之齒 一踏彳、置Α包括一驅動組件21，安裝在交互連動於 動傘齒輪的曲柄12上，且具有同心設置的複數個驅 件21的/5 受驅動傘齒輪組件300，包括與驅動組 —成驅動傘齒輪25相嚙合的複數個受驅動傘齒輪； 其動軸221，裝設於受驅動傘齒輪組件3〇〇，且在 —槽有沿著受驅動軸221的長度方向延伸形成的 或i離;一滑移構件3，嵌置在槽口 222中且裝設 滑移構件ίί動傘齒輪組件;及—傳動單元，依據 狀態，而批/f於受驅動傘齒輪組件3〇〇的裝設及卸離 間2 1 1]跫驅動軸221與受驅動傘齒輪組件300之 战為扣合及釋放狀態。 12並匕二“二自行車、1〇的踏板11連接於曲柄 動组彳it π #連接於具有複數個驅動傘齒輪25的驅 、、 ’八中驅動傘齒輪25為同心設置。 齒輪Ππ供有具有複數個受驅動傘齒輪的受驅動傘 動傘齒=使這些受驅動傘齒輪可編合於驅 1受驅動傘齒輪組件結合於受㈣軸221的其中 201219261 受驅動軸221的外端連接於一具有後輪的後輪區。 如圖3所示，驅動組件21的驅動傘齒輪25為同心 設置，並且受驅動傘齒輪組件300包括有嚙合於驅動傘 齒輪25的複數個受驅動傘齒輪301至306。 為闡明之用，驅動組件21的驅動傘齒輪25將以第 一至第六列齒輪251至256來表示。 第一列齒輪251具有最小的直徑，故第一列齒輪 251具有較少的齒數，而第六列齒輪256具有最大的直 徑，故第六列齒輪256具有較多的齒數。 如此一來，若受驅動傘齒輪組件300喷合於第一列 齒輪251，則受驅動傘齒輪組件300以低速轉動。相對 地，若受驅動傘齒輪組件300嚙合於第六列齒輪256， 則受驅動傘齒輪組件300以高速轉動，其將在之後詳細 說明。 受驅動轴221為一具有一預定長度的桿。受驅動傘 齒輪組件300位在受驅動軸221的其中一端，且嚙合於 驅動組件21的驅動傘齒輪25。另外，在受驅動軸221 的外表面形成有至少一個沿著受驅動軸221長度方向 的槽口 222。根據本發明代表性的實施例，係以一固定 間距間隔形成有三個槽口 222。 受驅動傘齒輪組件300包括有對應於驅動組件21 的第一至第六列齒輪251至256的第一至第六受驅動傘 齒輪301至306。 受驅動傘齒輪組件300包括有一與滑移構件3交互 連動的一傳動單元，以容許第一至第六受驅動傘齒輪 301至306於齒輪傳動運作中選擇性地扣合或釋放。 傳動單元包括複數個引導壁223，其於圓周方向自 受驅動轴221的外表面凸起，並且以一預定間距互相間 201219261 隔。 在相鄰引導壁223之間形成有複數個斜槽224。 另外，在斜槽224中安裝有複數個滚動單元R。 滾動單元R以緊附或疏離受驅動傘齒輪組件300 的内側表面的方式與滑移構件3交互連動，藉此扣合或 釋放受驅動傘齒輪組件300。 斜槽224可以藉由間歇切削受驅動軸221的外表面 而形成。如圖5所示，各個斜槽224包括朝單一方向傾 斜的一斜面224-1以及自斜面224-1的其中一端延伸的 一垂直面224-2。 滾動單元R構成與斜面224-1的接觸。如此，若滾 動單元R沿斜面224-1移動，滾動單元R緊附在受驅動 傘齒輪組件300的内側表面，藉此扣合受驅動傘齒輪組 件 300。 一嵌置溝槽225形成在最外邊的斜槽與引導壁223 之間，並且嵌置溝槽225與槽口 222相連通。 例如，五個斜槽224作為一組，且引導壁223凸起 在二個相鄰組的斜槽224之間。 另外，連通於槽口 222的嵌置溝槽225形成在最外 邊的斜槽224與引導壁223之間，並且滑移構件3嵌置 在嵌置溝槽225。 如圖5所示，沿著受驅動軸221的外表面提供有三 組斜槽224，同時以引導壁223互相區隔開。 斜槽224的數量以及斜槽224的組數可根據應用而 多樣變化，因此本發明並不限制於此。 如圖4及5所示，在受驅動軸221的外表面以120 度的間隔提供有三個引導壁223。引導壁223的數量為 可根據應用而改變的。 201219261 =單元R可包括具有輯㈣彡狀的—滾針轴承 a疋具有一預定長度的桿形。 軸承另外’㈣單元R可包括具有桿形的—凸輪狀滚針 故五閱圖5’因為滾動單元r對應於斜槽224， 故五個滾動單元R作為一組。 中。如此五個滾動單70 R安農於一個組的斜槽224 中安裝有三組的滾動單元R，且為 -至第：^為第一至第三組。滾動單分別對摩第 置。，、又驅動傘齒輪301至306的内側表面而排列^ 珠實=’如圖4所示，複數個滚 J从成串地排列在相鄰於嵌罟 224中。在這個情^ 二置賴225的斜槽 ^ ^ Λ r在'月移構件3嵌詈或知μ从也 置溝槽225時，滾珠μ可以㈣ ^卸離於嵌 由於滾珠R-丨鄰接於嵌置溝样、 '取小。 構成與潛敕雄灿 g 225 ’滾珠r_ 1可以 件3的接觸且滑移構件3藉由滾珠J可 被+滑地操作。亦即，滾珠R]可作為軸承之用 R ]。根據本發明的另—實施例，滾動單^ R可包括滾珠 根據本發明，如圖6所示，藉由第一至第 ===作到六階齒輪傳動是可能的。齒輪傳 勁丨^数，藉由凋整受驅動傘齒輪的數量而可改變的。 於第一至第六受驅動傘齒輪3〇1至3〇6上， 有三組的滾動單元R。 捉仏 θ第一至第六受驅動傘齒輪301至306在其端部分別 提供有夾環226,以避免滚動單元R於減少第一至^六 201219261 受驅動傘齒輪301至306之間的摩擦時自第一至第六受 驅動傘齒輪301至306脫離。 失環226組配於形成在引導壁223的溝槽223-1中。 失環226避免在第一至第六受驅動傘齒輪3〇1至 306獨立轉動時第一至第六受驅動傘齒輪π〗至互 相干涉，藉此避免第一至第六受驅動傘齒輪3〇1至3〇6 之間的摩擦。 滑移構件3為一具有一預定長度的插銷。滑移構件 3嵌置於槽口 222,且在槽σ 222中前後地移動以選擇 性地扣合或釋放受驅動傘齒輪組件3〇〇的第一至第六 文驅動傘齒輪301至306，以便可以實現齒輪傳動。 一較佳地，受驅動軸221中形成有三個槽口 222並且 二個滑移構件3分別嵌置於三個槽口 222。 滑移構件3由一致動單元所致動。致動單元包括一 結合於叉驅動軸221的軸承7、一可移動地環繞組配於 爻驅動軸221的致動構件5、一設置在軸承7與致動構 件5之間的彈簧6、以及—用以使致動構件5在一前進 方向上移動的致動器。 如圖7所示’在滑移構件3的前端形成有—尖銳段 32 ,以使滑移構件3可以容易地嵌置入嵌置溝槽奶。 在滑移構件3的後端形成有—階狀段34，以 配於文驅動軸221的致動構件5結合於階狀段34。凡、 一螺旋彈簧6位在與受驅動軸221結合的軸承 致動構件5之間。 ί 7與 以此万式 对呼耳6的彈力施加於致動構件5 致動器連接於致動構件5。致動ϋ可包括連接於一 齒輪，動控制桿的-金屬線或是藉由接收外二 號而操作的一電子傳動裝置。 " 201219261 每當致動器受到操作時，則會推動致動構件5朝受 驅動軸221移動，使滑移構件3向前移動。 另外，每當致動器未受到操作時，致動構件5則因 彈簧6的彈力而往回移動^如此，滑移構件3也會往回 移動，以使滑移構件3自受驅動傘齒輪組件300卸離。 當滑移構件3自受驅動傘齒輪組件300卸離時，則 達到最高齒輪傳動等級。例如，由於本發明採用六階齒 輪傳動結構，最高齒輪傳動等級則為第六齒輪傳動等 級。 隨著齒輪傳動等級變得更高，受驅動軸221可於更 高速轉動。 在下文中，將說明根據本發明的無鏈自行車之齒輪 傳動裝置的操作。 圖6為一顯示當齒輪傳動裝置於高速模式時根據 本發明的無鏈自行車之齒輪傳動裝置的滑移構件的位 置的立體圖、圖7為一顯示當齒輪傳動裝置於高速模式 時根據本發明的無鏈自行車之齒輪傳動裝置的滑移構 件的位置的側視剖面圖、圖8為一顯示於高速模式下在 第六受驅動傘齒輪中的滚動單元的位置的前視圖。 如圖6至8所示，若致動器未受操作，則致動構件 5因彈簧6的彈力而往回移動，以及與致動構件5結合 的滑移構件3也往回移動。如此一來，滑移構件3則自 受驅動傘齒輪組件300的第一至第六受驅動傘齒輪301 至306的嵌置溝槽225分離。 因此，第一至第六受驅動傘齒輪301至306因驅動 傘齒輪25而向右轉動，以致滾動單元R沿著斜面224-1 移動直至滚動單元R與受驅動傘齒輪組件300的内側表 面構成接觸。如此一來，第六受驅動傘齒輪306被滾動 201219261 單元R扣合住，以致第六受驅動傘齒輪306可與受驅動 轴221 —同轉動。 詳細而言，第六受驅動傘齒輪306嚙合於排列在驅 動傘齒輪25的最外邊的位置的第六列齒輪256，使得 第六受驅動傘齒輪306具有大於第一至第五受驅動傘 齒輪301至305的齒輪比。 例如，若第六列齒輪256具有100齒且第六受驅動 傘齒輪306具有20齒，則齒輪比為5。換言之，第六 列齒輪256轉動一圈則第六受驅動傘齒輪306轉動五 圈。 另外，若第一列齒輪251具有20齒且第一受驅動 傘齒輪301具有20齒，則齒輪比為1。換言之，第一 列齒輪251轉動一圈則第一受驅動傘齒輪301轉動一 圈。 如此一來，具有最高齒輪比的第六列齒輪256可於 最高速轉動。 由於第六列齒輪256於最高速轉動，故受驅動軸 221於高速轉動且連接於受驅動軸221的後輪也於高速 轉動。 在下文中，將就第三階齒輪傳動進行說明，亦即， 本發明的中速模式。 圖9為一顯示當齒輪傳動裝置於中速模式時根據 本發明的無鏈自行車之齒輪傳動裝置的滑移構件的位 置的立體圖、圖10為一顯示當齒輪傳動裝置於中速模 式時根據本發明的無鏈自行車之齒輪傳動裝置的滑移 構件的位置的側視剖面圖、以及圖11為一顯示於中速 模式下在第三受驅動傘齒輪中的滾動單元的位置的前 視圖。 14 201219261 如圖9至11所示，每當致動器受操作時，則致動 構件5向前移動以致彈簧6被壓縮。如此一來，與致動 構件5結合的滑移構件3則向前移動直至滑移構件3嵌 置入第四受驅動傘齒輪304。 每當滑移構件3嵌置入第四受驅動傘齒輪304時， 則滑移構件3組配於第四至第六受驅動傘齒輪304至 306的嵌置溝槽225，從而滑移構件3使滾動單元R朝 著斜槽的垂直面移動，以致滾動單元R自第四至第六受 驅動傘齒輪304至306疏離。如此一來，第四至第六受 驅動傘齒輪304至306可空轉而不傳動旋轉力至受驅動 軸 221。 然而，第三受驅動傘齒輪303與驅動傘齒輪25相 嚙合，所以第三受驅動傘齒輪303為轉動的。詳細而 言，具有較高齒輪比的第三受驅動傘齒輪303主要產生 用於受驅動軸221的旋轉力。 在下文中，將參照圖12至14說明本發明的低速模 式，亦即，第一階齒輪傳動。 圖12為一顯示當齒輪傳動裝置於低速模式時根據 本發明的無鏈自行車之齒輪傳動裝置的滑移構件的位 置的立體圖、圖13為一顯示當齒輪傳動裝置於低速模 式時根據本發明的無鏈自行車之齒輪傳動裝置的滑移 構件的位置的側視剖面圖、以及圖14為一顯示於低速 模式下在第二受驅動傘齒輪中的滾動單元的位置的前 視圖。 如圖12至14所示，若致動器受操作，則致動構件 5向前移動同時壓縮彈簧6，以使與致動構件5結合的 滑移構件3向前移動直至滑移構件3嵌置入第二受驅動 傘齒輪302。 15 201219261 每當滑移構件3嵌置入第二受驅動傘齒輪302時， 則滾動單元R自第二至第六受驅動傘齒輪302及306 疏離。如此一來，第二至第六受驅動傘齒輪302至306 可空轉而不傳動旋轉力至受驅動軸221。 然而，第一受驅動傘齒輪301與驅動傘齒輪25相 嚙合，所以第一受驅動傘齒輪301為轉動的。第一受驅 動傘齒輪301的旋轉力被傳動至受驅動軸221，以轉動 受驅動軸221。 由於第一受驅動傘齒輪301具有最低齒輪比，受驅 動軸221會於低速轉動，以致後輪於低速轉動。 第二、第四、及第五階齒輪傳動相似於中速模式， 故將省略其詳細說明以避免贅述。 儘管本發明的代表性實施例已作為例證之用而說 明，該領域熟習此項技藝者當知，在不背離於如同伴隨 的申請專利範圍中所揭露的本發明的範圍及精神下，各 種改變、增加、及替代為可能的。 【圖式簡單說明】 圖1為一顯示根據關聯技術的齒輪傳動裝置的立體圖； 圖2為一顯示配備有根據本發明的一齒輪傳動裝置的 一自行車的立體圖； 圖3為一顯示根據本發明的無鏈自行車之齒輪傳動裝 置的立體圖； 圖4為一顯示根據本發明的無鏈自行車之齒輪傳動裝 置的爆炸圖； 圖5為一顯示根據本發明的無鏈自行車之齒輪傳動裝 置的受驅動傘齒輪的前視圖； 圖6為一顯示當齒輪傳動裝置於高速模式時根據本發 明的無鏈自行車之齒輪傳動裝置的滑移構件的位置的 立體圖； 16 201219261 圖7為一顯示當齒輪傳動裝置於高速模式時根據本發 明的無鏈自行車之齒輪傳動裝置的滑移構件的位置的 側視剖面圖； 圖8為一顯示於高速模式下在第六受驅動傘齒輪中的 滾動單元的位置的前視圖； 圖9為一顯示當齒輪傳動裝置於中速模式時根據本發 明的無鏈自行車之齒輪傳動裝置的滑移構件的位置的 立體圖； 圖10為一顯示當齒輪傳動裝置於中速模式時根據本發 明的無鏈自行車之齒輪傳動裝置的滑移構件的位置的 側視剖面圖； 圖11為一顯示於中速模式下在第三受驅動傘齒輪中的 滾動單元的位置的前視圖； 圖12為一顯示當齒輪傳動裝置於低速模式時根據本發 明的無鏈自行車之齒輪傳動裝置的滑移構件的位置的 立體圖； 圖13為一顯示當齒輪傳動裝置於低速模式時根據本發 明的無鏈自行車之齒輪傳動裝置的滑移構件的位置的 側視剖面圖；及 圖14為一顯示於低速模式下在第二受驅動傘齒輪中的 滾動單元的位置的前視圖。 【主要元件符號說明】 10自行車 11踏板 12曲柄 21驅動組件 22受驅動組件 22a 受驅動軸 22b 插銷 17 201219261 221 受驅動轴 222 槽口 223 引導壁 223-1溝槽 224 斜槽 224-1斜面 224-2垂直面 226 炎環 25驅 動傘齒輪 251 第一列齒輪 252 第二列齒輪 253 第三列齒輪 254 第四列齒輪 255 第五列齒輪 256 第六列齒輪 300 受驅動傘齒輪組件 301 第一受驅動傘齒輪 302 第二受驅動傘齒輪 303 第三受驅動傘齒輪 304 第四受驅動傘齒輪 305 第五受驅動傘齒輪 306 第六受驅動傘齒輪 3滑移構件 32尖銳段 34階狀段 5致動構件 6彈簧 7軸承 18 201219261 A齒輪傳動裝置 R滾動單元201219261, invention description: TECHNICAL FIELD OF THE INVENTION The present invention relates to a gear transmission for a chainless bicycle. More specifically, the present invention relates to a gearless transmission for a chainless bicycle, wherein the gear transmission includes a drive assembly that interacts with the rotating plate and has a plurality of bevel gears that are concentrically arranged with different numbers of teeth and a driven An assembly having a plurality of driven bevel gears engaged with the drive bevel gears and a driven wheel coupled to the rear wheels selectively engaged by the operation of a glide member coupled to the driven shaft Drive the bevel gear to adjust the gear transmission level. [Prior Art] In general, a vehicle such as a bicycle is moved by the driving force supplied from the pedal. The driving force supplied from the pedal is transmitted to the rear wheel through the key bar. However, in a bicycle having such a structure, the chain may repeatedly relax during the force transmission, and thus the force transmission efficiency may be impaired. In extreme cases, the chain may get out of the bike. In order to solve the above problems, the applicant of the present invention has filed a patent application entitled "Driving Apparatus for Bicycle" (Korean Unexamined Patent Publication No. Ui-2004-0026785). In addition, the applicant of the present invention has also filed a patent application entitled "Gear Transmission Apparatus" (Korean Registered Patent Publication No. 10-0688611 'hereinafter, referred to as related technology>), It is used in bicycles to reduce the force loss during the force transmission process and by providing a drive assembly with a gear transmission function and a drive assembly of a plurality of 201219261 movable bevel gears with concentric arrangements of different numbers of teeth. The number of components is minimized. As shown in Fig. 1, the gear transmission of the related art 1 includes a driven assembly 22 in which a latch 22b that moves along the driven shaft 22a and a notch formed in a driven bevel gear that is supported by the drive shaft 22a are shown. Assembly and separation to achieve gear transmission. However, the movement of such a latch 22b is caused by the user's hand. Therefore, in order to perform the gear transmission so that the driven bevel gear 22b engaged with the driving bevel gear can rotate together with the driven shaft 22a, a large force is required. As a result, the gear transmission becomes difficult when the vehicle is traveling at a high speed, that is, when the bevel gear is driven to rotate at a high speed. In order to solve the above problems, the applicant of the present invention has filed a patent application entitled "Driven Assembly of Gear Transmission Apparatus" (Korean Registered Patent Publication No. 10-0809845, hereinafter , called associated technology 2). According to the related art 2, a sliding member directly rotates a driven bevel gear or a ratchet wheel to indirectly rotate the driven bevel gear without hindering the rotation of the driven bevel gear, so that even when the driving bevel gear is rotated at a high speed It is still possible to simply achieve gear transmission. The related art 2 has been developed in comparison with the related art 1, but there is still a need for a technique capable of accurately performing gear transmission operation in a simple structure. SUMMARY OF THE INVENTION The present invention is directed to solving the problems occurring in the related art, and it is therefore an object of the present invention to provide a bicycle gear transmission in which the sliding member is coupled to the driven shaft before and after 201219261 2 move: make the two selectively buckle or release the driven bevel gears to facilitate the wheel drive. The 4th stage can be easily controlled, the gear drive operation can improve the structure of the tooth 4 mover, which can be simplified, thereby To achieve the above object, according to one embodiment of the present invention, an i-bag-less bicycle gear transmission device, the gear transmission unit, and the driving assembly are mounted on a crank gear 交互 that is interlocked with a pedal has a concentric arrangement a plurality of driving bevel gears, a driven umbrella, and a plurality of parts including a driving bevel gear of the driving assembly, and a bevel gear, a driven shaft, mounted on the driven bevel gear set Alternatively, the outer surface is formed to extend away from the length of the driven shaft away from the il port, a sliding member, embedded in the slot, and to mount or unload the phase bevel gear set And a drive unit by mounting the drive mechanism according to slip under the drive bevel gear assembly bismuth and unloaded from the state and the control state '. The sleeve and the driven bevel gear assembly are snapped and released (10). According to a representative embodiment of the present invention, the driven shaft includes an actuating motion t' that drives the glide member to perform a gearing operation. The actuating unit is a bearing, coupled to the driven shaft, the actuating member, the wraparound assembly, the spring disposed between the bearing and the actuating member, and the actuator for actuating the member Move in a forward direction. According to a representative embodiment of the present invention, the transmission unit includes a plurality of guide walls formed on an outer surface of the driven shaft, a plurality of chutes, an outer surface of the driven shaft formed between the guide walls, and a rear portion a groove formed on an outer surface of the driven shaft between the chute and the guide walls for the sliding member to be embedded in the embedding groove, and a plurality of rolling units mounted to the chute And attached or alienated from the inside surface of the driven bevel gear. 201219261 In accordance with a representative embodiment of the present invention, the chute includes a ramp that slopes in a single direction, and a vertical plane that extends from the end of the ramp, and the scroll unit is mounted on the ramp. As described above, according to the present invention, the sliding member controls the position of the rolling unit in a state in which the sliding member is coupled to the driven shaft to selectively engage or release the driven bevel gears, thus making the gear transmission level It can be easily controlled, the gearing operation can be easily performed, and the structure of the gear transmission can be simplified, thereby improving the reliability of the gear transmission operation. [Embodiment] Hereinafter, a representative embodiment of the present invention will be described in detail with reference to the accompanying drawings. 2 is a perspective view showing a bicycle equipped with a gear transmission according to the present invention, FIG. 3 is a perspective view showing a gear transmission of a chainless bicycle according to the present invention, and FIG. 4 is a view showing the present invention according to the present invention. Explosion diagram of the gear transmission of the chain bicycle, FIG. 5 is a front view showing the driven bevel gear of the gearless transmission of the chainless bicycle according to the present invention, and FIG. 6 is a view showing the gear transmission in the high speed mode according to the present invention. A perspective view of the position of the slip member of the gearless transmission of the inventive chainless bicycle, and FIG. 7 is a side showing the position of the slip member of the gearless transmission of the chainless bicycle according to the present invention when the gear transmission is in the high speed mode A cross-sectional view, FIG. 8 is a front view showing the position of the rolling unit in the sixth driven bevel gear in the high speed mode, and FIG. 9 is a view showing the chainless according to the present invention when the gear transmission is in the medium speed mode. A perspective view of the position of the slip member of the bicycle gear transmission, and FIG. 10 is a view showing when the gear transmission is in the medium speed mode A side cross-sectional view of the position of the sliding member of the gearless transmission of the inventive chainless bicycle, FIG. 1 is a front view showing the position of the rolling unit in the third driven bevel gear in the middle of 201219261 , PI 1 qa according to the present 闽 η is a sliding member speed mode 1 stereoscopic diagram showing the gear transmission of the gearless transmission when the gear transmission is in the low speed mode, and FIG. 13 is a display of the gear transmission A side cross-sectional view of the position of the speed mode of the gearless transmission of the chainless bicycle according to the present invention, and FIG. 14 is a position of the rolling unit shown in the second driven bevel gear The gear of the chainless bicycle according to the present invention is shown in FIG. 14 . The tooth of the chainless bicycle according to the present invention includes a driving assembly 21 mounted on the crank 12 that is interlocked with the movable bevel gear and has a concentric setting. The driven driven bevel gear assembly 300 of the plurality of drive members 21 includes a plurality of driven bevel gears that mesh with the drive group - the drive bevel gear 25; and the movable shaft 221 is mounted to the driven bevel gear assembly 3 〇〇, and the groove is formed along the longitudinal direction of the driven shaft 221; or a sliding member 3 is embedded in the notch 222 and is provided with a sliding member ί movable bevel gear assembly; - The transmission unit, depending on the state, the batch/f is mounted and disengaged between the driven bevel gear assembly 3〇〇 2 1 1] The drive shaft 221 and the driven bevel gear assembly 300 are engaged and released. 12 and 2 "two bicycles, one pedal 11 is connected to the crank movement group 彳it π # is connected to the drive with a plurality of drive bevel gears 25, and the 'eight-drive bevel gear 25 is concentrically arranged. Gear Π π is provided Driven umbrella bevel with a plurality of driven bevel gears = enable these driven bevel gears to be engaged with the drive 1 driven bevel gear assembly coupled to the (four) shaft 221 where the outer end of the 201219261 driven shaft 221 is connected A rear wheel region having a rear wheel. As shown in FIG. 3, the drive bevel gear 25 of the drive assembly 21 is concentrically disposed, and the driven bevel gear assembly 300 includes a plurality of driven bevel gears 301 that are engaged with the drive bevel gear 25. To 306. For clarification, the drive bevel gear 25 of the drive assembly 21 will be represented by the first to sixth train gears 251 to 256. The first train gear 251 has the smallest diameter, so the first train gear 251 has less The sixth row of gears 256 has the largest diameter, so the sixth row of gears 256 has a larger number of teeth. Thus, if the driven bevel gear assembly 300 is sprayed on the first row of gears 251, the driven umbrella Gear assembly 300 In contrast, if the driven bevel gear assembly 300 is engaged with the sixth column gear 256, the driven bevel gear assembly 300 is rotated at a high speed, which will be described in detail later. The driven shaft 221 has a predetermined length. The driven bevel gear assembly 300 is located at one end of the driven shaft 221 and is engaged with the driving bevel gear 25 of the driving assembly 21. In addition, at least one of the outer surfaces of the driven shaft 221 is formed along the driven shaft 221 Longitudinal notches 222. According to a representative embodiment of the present invention, three notches 222 are formed at a fixed pitch. The driven bevel gear assembly 300 includes first to sixth column gears corresponding to the drive assembly 21. First to sixth driven bevel gears 301 to 306 of 251 to 256. The driven bevel gear assembly 300 includes a transmission unit that interacts with the sliding member 3 to allow the first to sixth driven bevel gears 301 to 306 selectively snaps or releases during gearing operation. The transmission unit includes a plurality of guide walls 223 that are convex from the outer surface of the driven shaft 221 in the circumferential direction, and The plurality of chutes 224 are formed between the adjacent guide walls 223. In addition, a plurality of rolling units R are mounted in the chute 224. The rolling unit R is used to attach or detach the driven umbrella. The manner of the inner side surface of the gear assembly 300 interacts with the glide member 3, thereby engaging or releasing the driven bevel gear assembly 300. The chute 224 can be formed by intermittently cutting the outer surface of the drive shaft 221. As shown, each chute 224 includes a ramp 224-1 that slopes in a single direction and a vertical plane 224-2 that extends from one end of the ramp 224-1. The rolling unit R constitutes contact with the inclined surface 224-1. Thus, if the rolling unit R moves along the slope 224-1, the rolling unit R is attached to the inner side surface of the driven bevel gear assembly 300, thereby engaging the driven bevel gear assembly 300. A nesting groove 225 is formed between the outermost chute and the guide wall 223, and the embedding groove 225 is in communication with the notch 222. For example, five chutes 224 are grouped together, and the guide walls 223 are raised between two adjacent sets of chutes 224. Further, a fitting groove 225 communicating with the notch 222 is formed between the outermost chute 224 and the guide wall 223, and the sliding member 3 is embedded in the embedding groove 225. As shown in Fig. 5, three sets of chutes 224 are provided along the outer surface of the driven shaft 221 while being spaced apart from each other by the guide walls 223. The number of the chutes 224 and the number of sets of the chutes 224 may vary depending on the application, and thus the present invention is not limited thereto. As shown in Figs. 4 and 5, three guide walls 223 are provided at an interval of 120 degrees on the outer surface of the drive shaft 221. The number of guide walls 223 is changeable depending on the application. 201219261 = unit R may include a needle bearing having a series (four) shape - a rod shape having a predetermined length. The other bearing unit (R) unit R may include a cam-shaped needle having a rod shape. Therefore, since the rolling unit r corresponds to the chute 224, the five rolling units R are a group. in. The five rolling sheets 70 R Annon are installed in three sets of chutes 224 with three sets of rolling units R, and - to :: ^ are the first to third groups. The scrolling list is separately set. And, the inner side surfaces of the bevel gears 301 to 306 are driven to be aligned. ^ Beads = ' As shown in Fig. 4, a plurality of rollers J are arranged in series adjacent to the nest 224. In this case, the two sloping 225 sloping grooves ^ ^ Λ r in the 'monthly moving member 3 詈 or knowing μ from the grooving 225, the ball μ can be (4) ^ detached from the inlay due to the ball R-丨 adjacent to Embed the groove sample, 'take small. The composition is in contact with the squirrel g 225 'the ball r_ 1 and the sliding member 3 can be operated by the roller J. That is, the ball R] can be used as a bearing R]. According to another embodiment of the present invention, the scrolling unit can include balls. According to the present invention, as shown in Fig. 6, it is possible to make the sixth-order gear transmission by the first to the fourth ===. The gears can be changed by the number of driven bevel gears. On the first to sixth driven bevel gears 3〇1 to 3〇6, there are three sets of rolling units R. The first to sixth driven bevel gears 301 to 306 are respectively provided with clamp rings 226 at their ends to prevent the rolling unit R from being reduced between the first to the sixth 201219261 driven bevel gears 301 to 306. The first to sixth driven bevel gears 301 to 306 are disengaged upon friction. The lost loop 226 is assembled in the groove 223-1 formed in the guide wall 223. The loss of ring 226 avoids the first to sixth driven bevel gears π _ to interfere with each other when the first to sixth driven bevel gears 3〇1 to 306 are independently rotated, thereby avoiding the first to sixth driven bevel gears 3 〇 1 to 3〇6 friction. The sliding member 3 is a latch having a predetermined length. The glide member 3 is embedded in the notch 222 and moves back and forth in the groove σ 222 to selectively engage or release the first to sixth driven bevel gears 301 to 306 of the driven bevel gear assembly 3〇〇, In order to achieve gear transmission. Preferably, three notches 222 are formed in the driven shaft 221 and the two sliding members 3 are respectively embedded in the three notches 222. The glide member 3 is actuated by an actuating unit. The actuating unit includes a bearing 7 coupled to the fork drive shaft 221, an actuating member 5 movably surrounding the cymbal drive shaft 221, a spring 6 disposed between the bearing 7 and the actuating member 5, and An actuator for moving the actuating member 5 in a forward direction. As shown in Fig. 7, a sharp portion 32 is formed at the front end of the sliding member 3 so that the sliding member 3 can be easily fitted into the embedded grooved milk. At the rear end of the sliding member 3, a stepped section 34 is formed, so that the actuating member 5 provided to the driving shaft 221 is coupled to the stepped section 34. A coil spring 6 is positioned between the bearing actuating member 5 coupled to the driven shaft 221. ί 7 and the elastic force of the striker 6 in this manner are applied to the actuating member 5 and the actuator is coupled to the actuating member 5. The actuation mechanism may include a wire connected to a gear, a moving lever, or an electronic transmission operated by receiving the outer number 2. " 201219261 Whenever the actuator is operated, the actuating member 5 is pushed toward the driven shaft 221 to move the sliding member 3 forward. In addition, each time the actuator is not operated, the actuating member 5 is moved back by the elastic force of the spring 6 so that the sliding member 3 also moves back to make the sliding member 3 self-driven bevel gear Assembly 300 is detached. When the glide member 3 is detached from the driven bevel gear assembly 300, the highest gear transmission level is reached. For example, since the present invention employs a sixth-order gear transmission structure, the highest gear transmission level is the sixth gear transmission level. As the gear transmission level becomes higher, the driven shaft 221 can be rotated at a higher speed. Hereinafter, the operation of the gearless transmission of the chainless bicycle according to the present invention will be explained. Figure 6 is a perspective view showing the position of the slip member of the gearless transmission of the chainless bicycle according to the present invention when the gear transmission is in the high speed mode, and Fig. 7 is a view showing the gear transmission in the high speed mode according to the present invention. A side cross-sectional view of the position of the slip member of the gearless transmission of the chainless bicycle, and Fig. 8 is a front elevational view showing the position of the rolling unit in the sixth driven bevel gear in the high speed mode. As shown in Figs. 6 to 8, if the actuator is not operated, the actuating member 5 is moved back by the elastic force of the spring 6, and the sliding member 3 coupled with the actuating member 5 is also moved back. As a result, the sliding member 3 is separated from the fitting grooves 225 of the first to sixth driven bevel gears 301 to 306 of the driven bevel gear assembly 300. Therefore, the first to sixth driven bevel gears 301 to 306 are rotated to the right by driving the bevel gear 25, so that the rolling unit R moves along the slope 224-1 until the rolling unit R and the inner side surface of the driven bevel gear assembly 300 are moved. Make up contact. As a result, the sixth driven bevel gear 306 is rolled 201219261 unit R snaps so that the sixth driven bevel gear 306 can rotate with the driven shaft 221. In detail, the sixth driven bevel gear 306 is meshed with the sixth column gear 256 arranged at the outermost position of the driving bevel gear 25 such that the sixth driven bevel gear 306 has greater than the first to fifth driven bevel gears. Gear ratio of 301 to 305. For example, if the sixth train gear 256 has 100 teeth and the sixth driven bevel gear 306 has 20 teeth, the gear ratio is five. In other words, the sixth driven gear 306 is rotated five revolutions as the sixth row of gears 256 is rotated. Further, if the first train gear 251 has 20 teeth and the first driven bevel gear 301 has 20 teeth, the gear ratio is 1. In other words, the first driven bevel gear 301 is rotated once by the first row of gears 251. As a result, the sixth train gear 256 having the highest gear ratio can be rotated at the highest speed. Since the sixth train gear 256 is rotated at the highest speed, the rear wheel that is driven by the drive shaft 221 to rotate at a high speed and is connected to the driven shaft 221 also rotates at a high speed. In the following, a third-order gear transmission will be described, that is, the medium-speed mode of the present invention. Figure 9 is a perspective view showing the position of the slip member of the gearless transmission of the chainless bicycle according to the present invention when the gear transmission is in the medium speed mode, and Fig. 10 is a view showing the gear transmission in the medium speed mode according to the present invention. A side cross-sectional view of the position of the slip member of the gearless bicycle gear of the invention, and FIG. 11 is a front elevational view showing the position of the rolling unit in the third driven bevel gear in the medium speed mode. 14 201219261 As shown in Figures 9 through 11, each time the actuator is operated, the actuating member 5 is moved forward so that the spring 6 is compressed. As a result, the sliding member 3 combined with the actuating member 5 is moved forward until the sliding member 3 is inserted into the fourth driven bevel gear 304. Whenever the sliding member 3 is fitted into the fourth driven bevel gear 304, the sliding member 3 is assembled to the embedding grooves 225 of the fourth to sixth driven bevel gears 304 to 306, so that the sliding member 3 The rolling unit R is moved toward the vertical plane of the chute so that the rolling unit R is alienated from the fourth to sixth driven bevel gears 304 to 306. As a result, the fourth to sixth driven bevel gears 304 to 306 can be idling without transmitting the rotational force to the driven shaft 221. However, the third driven bevel gear 303 is engaged with the drive bevel gear 25, so the third driven bevel gear 303 is rotated. In detail, the third driven bevel gear 303 having a higher gear ratio mainly generates a rotational force for being driven by the drive shaft 221. Hereinafter, the low speed mode of the present invention, that is, the first stage gear transmission will be described with reference to Figs. Figure 12 is a perspective view showing the position of the slip member of the gearless transmission of the chainless bicycle according to the present invention when the gear transmission is in the low speed mode, and Fig. 13 is a view showing the gear transmission in the low speed mode according to the present invention. A side cross-sectional view of the position of the slip member of the gearless transmission of the chainless bicycle, and FIG. 14 is a front elevational view showing the position of the rolling unit in the second driven bevel gear in the low speed mode. As shown in Figures 12 to 14, if the actuator is operated, the actuating member 5 is moved forward while compressing the spring 6 to move the sliding member 3 coupled with the actuating member 5 forward until the sliding member 3 is engaged The second driven bevel gear 302 is placed. 15 201219261 Whenever the sliding member 3 is inserted into the second driven bevel gear 302, the rolling unit R is alienated from the second to sixth driven bevel gears 302 and 306. As a result, the second to sixth driven bevel gears 302 to 306 can be idling without transmitting the rotational force to the driven shaft 221. However, the first driven bevel gear 301 meshes with the drive bevel gear 25, so the first driven bevel gear 301 is rotated. The rotational force of the first driven bevel gear 301 is transmitted to the driven shaft 221 to rotate the driven shaft 221. Since the first driven bevel gear 301 has the lowest gear ratio, the driven shaft 221 will rotate at a low speed so that the rear wheel rotates at a low speed. The second, fourth, and fifth-order gear transmissions are similar to the medium speed mode, and thus detailed descriptions thereof will be omitted to avoid redundancy. While the present invention has been described by way of example, it will be understood by those skilled in the art that various modifications and changes in the scope and spirit of the invention as disclosed in the appended claims , additions, and substitutions are possible. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing a gear transmission according to the related art; FIG. 2 is a perspective view showing a bicycle equipped with a gear transmission according to the present invention; FIG. 3 is a view showing a bicycle according to the present invention; 4 is a perspective view showing a gear transmission of a chainless bicycle according to the present invention; and FIG. 5 is an exploded view showing a gear transmission of a chainless bicycle according to the present invention. 6 is a front view showing the position of the sliding member of the gearless transmission of the chainless bicycle according to the present invention when the gear transmission is in the high speed mode; 16 201219261 FIG. 7 is a view showing the gear transmission A side cross-sectional view of the position of the slip member of the gearless transmission of the chainless bicycle according to the present invention in the high speed mode; FIG. 8 is a view showing the position of the rolling unit in the sixth driven bevel gear in the high speed mode Front view; Figure 9 is a diagram showing the gear of a chainless bicycle according to the present invention when the gear transmission is in the medium speed mode FIG. 10 is a side cross-sectional view showing the position of the sliding member of the gearless transmission of the chainless bicycle according to the present invention when the gear transmission is in the medium speed mode; FIG. a front view showing the position of the rolling unit in the third driven bevel gear in the medium speed mode; FIG. 12 is a view showing the gearless transmission of the chainless bicycle according to the present invention when the gear transmission is in the low speed mode FIG. 13 is a side cross-sectional view showing the position of the slip member of the gearless transmission of the chainless bicycle according to the present invention when the gear transmission is in the low speed mode; and FIG. 14 is a display A front view of the position of the rolling unit in the second driven bevel gear in the low speed mode. [Main component symbol description] 10 bicycle 11 pedal 12 crank 21 drive assembly 22 driven assembly 22a driven shaft 22b pin 17 201219261 221 driven shaft 222 notch 223 guide wall 223-1 groove 224 chute 224-1 bevel 224 -2 vertical plane 226 ring 25 drive bevel gear 251 first row gear 252 second row gear 253 third row gear 254 fourth row gear 255 fifth row gear 256 sixth column gear 300 driven bevel gear assembly 301 first Driven bevel gear 302 second driven bevel gear 303 third driven bevel gear 304 fourth driven bevel gear 305 fifth driven bevel gear 306 sixth driven bevel gear 3 slip member 32 sharp segment 34 stepped segment 5 Actuating member 6 spring 7 bearing 18 201219261 A gear transmission R rolling unit