1343343 ' 九、發明說明： 【發明所屬之技術領域】 本發明係關於自行車之曲柄齒盤組，制是指_種可以使鏈條轉速大 - 於曲柄轉速的齒盤組。 【先前技術】 如第一圖，係自行車概要結構之平面圖，大致上包含一車架（11)，樞 設於車架（11)之前、後車輪⑽（13)，以及帶動後車輪⑽轉動之傳動裝 _ 置（⑷。該傳動裝置(⑷具有一樞設於車架（11)適當處的曲柄踏板(141)， 一與曲柄踏板(141)連動的前齒盤（142)，一固設於後車輪(13)上的後齒盤 (143) ’以及圈繞連結於前、後會盤（142)(143)上的鏈條（144)。如第二圖， 係為一種習知具變速功效之齒盤設計之俯視圖，將前齒盤（142)由單一設計 變成兩種不同尺寸大小之齒盤（1421)(1422)同轴相接，或者再配合後齒盤 (143)係由數個不同尺寸的齒盤（1431) (1432) (1433) (1434) (1435)相接 合，鏈條（144)圈繞前、後齒盤（142)(143)上不同尺寸的齒盤，達到變速功 鲁能。 與本案技術上有關的是上述被曲柄踏板作用的前齒盤。若要讓前齒盤 具變速效果，習知方案係將數片不同尺寸及齒數的前齒盤與曲柄踏板同轴 連合’曲柄踏板帶動前齒盤轉動，並以一控制器控制該鏈條於各個前齒盤 之間轉換。但無論如何，曲柄踏板的轉速等於前齒盤的轉速，也等於鏈條 的轉速’並不會發生鏈條的轉速較曲柄踏板轉速為快的變速及加速效果。 【發明内容】 本發明之主要目的係要改造上述前齒盤組，使其發生鏈條的轉速較曲 5 1343343 柄踏板轉速為快的變速效果β 一種自行車之曲柄變速齒盤組，包含：一固定不動的恆星齒輪，内周 形成棘輪齒；一板，該板之中央設—轴孔，該板之其中一側與該軸孔同轴 没一轴套，該軸孔及轴套供一曲柄之轴樞穿固定；—飛輪齒盤，樞套於該 轴套上，外週形成棘輪齒；至少二行星齒輪可轴轉地設於該板之一侧，該 二行星齒輪與上述恆星齒輪之棘輪齒嚙合；至少二鏈輪，與該二行星齒輪 同軸地設在該板與上述飛輪齒盤之間；一被至少一鏈輪以及該飛輪齒盤共 參同齒合之鏈條。 【實施方式】 如第二、四、五圖，本發明自行車之曲柄變速齒盤組，包含： 一恒星齒輪(20)，内周形成棘輪齒（21)。 一後播（22)，設於該恆星齒輪(2〇)之一側面，其週邊以若干固定元件 (221)固定在恆星齒輪(2〇)的週邊’中央設一轴孔(222)。 一行星齒盤組(30) ’（請同時配合第四、五圖），包含一尺寸小於上述 怪星齒輪（20)内徑的板(31)，該板(31)之中央設一轴孔(32);至少二行星 齒輪(33)(34)可軸轉地設於該板(31)之一側，且二行星齒輪(33)(34)之中 心與上述板(31)之軸孔(32)中心呈一直線；二行星齒輪(33)(34)之部份齒 緣凸出該板(31) ’俾利與上述恆星齒輪(2〇)之棘輪齒（21)嚙合；至少二傳 動衡輪(35)(36) ’分別與上述二行星齒輪(33)(34)嚙合，可轴轉地設在該 板(31)之側；至少二鏈輪(37)(38)，與該二傳動齒輪(35)(36)同轴地設在 該板(31)之另一側，該板(31)與二傳動齒輪(35)(36)同一側於軸孔(32)處 6 1343343,. 設一轴套(39)。 -飛輪齒盤⑽）’樞套於絲套(39)上，外週具雜齒⑷）； 一起動輪(50) ’插套於該軸套(39)上該飛輪齒盤⑽)之外側，外週具 棘輪齒（51)。 如第六、七圖，上開部件之組合想以其後插(22)之轴孔(222)樞套固定 於為知自行車曲柄踏板(60)之外軸管（61)，為一不動部件。曲柄踏板(6〇) 之内軸（62)則固定於板（31)之軸孔（32)及軸套（39)中’兩端各與一曲柄 (63)(63’)接合’其中-曲柄⑽)更以固定元件⑽υ固定於該起動輪⑽）， 因此該曲柄（63)得帶動該起動輪(5〇)以及該板(31)轉動。一習知之自行車 鏈條(70)被一習知之自行車前變速切換裝置（圖未示）之控制而可鏈掛於上 述起動輪(50)或上述飛輪齒盤(40)。當鏈條(7〇)鏈掛於上述飛輪齒盤(4〇) 時，事實上係飛輪齒盤(40)與至少一鏈輪(37)(38)共同齒合該鏈條(7〇)。 上述之板（31)被該曲柄（63)驅轉，由於板（31)—侧之二行星齒輪 (33)(34)與悝星齒輪(20)的棘輪齒（21)喷合，故行星齒輪(33)(34)將發生 公轉（繞著恒星齒輪(20)轉動）以及自轉的動作。由於該二傳動齒輪(35)(3β) 分別與行星齒輪(33)(34)嚙合，行星齒輪(33)(34)自轉則使該傳動齒輪 (35)(36)轉動；又’該二鏈輪(37)(38)與該傳動齒輪(35)(36)同軸，因此 二鍵輪(37)(38)亦被驅轉’柩套齒合於其上的鍵條(70)即被驅轉，轉動的 鍵條(70)進一步帶動該飛輪齒盤(40) ’利用該飛輪齒盤(4〇)提供該鏈條(7〇) 轉動之慣性力量以及維持該鏈條（70)可作用之形狀。 如第八A、八B、八C圖，本發明具有至少兩個鍵輪(37)(38)，且二 7 1343343 本案結構除了應用於自行車之外’諸如電動兩輪車、代步車或其他應 用變速裝置之車輛亦可適用。 雖然本案是以一個最佳實施例做說明，但精於此技藝者能在不脫離本 案精神與範疇下做各種不同形式的改變。以上所舉實施例僅用以說明本案 而已’非用以限制本案之範圍。舉凡不違本案精神所從事的種種修改或變 化，俱屬本案申請專利範圍。 【圖式簡單說明】 第一圓係習知自行車整體概要側視圖。 第二圖係習知自行車前、後變速器之概要俯視示意圖。 第三圖係本發明變速齒盤之立體分解圊。 第四圓係本發明變速齒盤組中行星齿輪組與恆星齒輪之組合前視圖。 第五圖係本發明變速齒盤組中行星齒輪組與恆星齒輪之組合後視圖。 第六圖係本發明變速齒盤組安裝於自行車曲柄踏板之組合剖面圖，圖中之 鏈條係樞套於起動輪上。 第七圖係本發明變速齒盤組安裝於自行車曲柄踏板之組合剖面圖，圖中之 鏈條係樞套於飛輪齒盤以及鏈輪上。 第八A圖係第七圖中8A-8A剖面暨本發明之變速齒盤帶動鏈條轉動之動作 示意圖。 第八B圖係沿續第八A圖所繪之變速齒盤帶動鏈條轉動之動作示意圖。 第八C圖係沿續第八B圖所繪之變速齒盤帶動鏈條轉動之動作示意圖。 9 1343343. 【主要元件符號說明】 20- 恆星齒輪 21- 棘輪齒 22- 後擋 221-固定元件 222_轴孔 30- 行星齒盤組 31- 板 32- 軸孔 33- 行星齒輪 34- 行星齒輪 35- 傳動齒輪 36- 傳動齒輪 37-鏈輪 38- 鏈輪 39- 轴套 40- 飛輪齒盤 41- 棘輪齒 50- 起動輪 51- 棘輪齒 60- 曲柄踏板 61- 外拍管 62- 内袖 63, 63’-曲柄 631-固定元件 70-鏈條1343343 ' IX. Description of the Invention: [Technical Field of the Invention] The present invention relates to a crank toothed disc set for bicycles, which refers to a set of toothed discs which can make the chain rotate at a large speed - the crank speed. [Prior Art] As shown in the first figure, a plan view of a bicycle skeleton structure generally includes a frame (11) pivoted before the frame (11), the rear wheel (10) (13), and the rear wheel (10) is rotated. Transmission device ((4). The transmission device ((4) has a crank pedal (141) pivoted at a suitable position on the frame (11), and a front tooth plate (142) interlocking with the crank pedal (141), a fixing device a rear sprocket wheel (143)' on the rear wheel (13) and a chain (144) wound around the front and rear meeting plates (142) (143). As shown in the second figure, it is a conventional shifting gear. The top view of the effect of the toothed disc design, the front sprocket (142) is changed from a single design to two different sizes of sprocket (1421) (1422) coaxially connected, or with the rear sprocket (143) Different sizes of spurs (1431) (1432) (1433) (1434) (1435) are engaged, and the chain (144) is wound around different sizes of sprocket wheels on the front and rear sprocket (142) (143) to achieve shifting Gong Luneng. Related to the technical aspect of the case is the above-mentioned front sprocket wheel which is operated by the crank pedal. If the front sprocket wheel has a shifting effect, the conventional scheme will have several different pieces. The front sprocket of the size and the number of teeth is coaxially coupled with the crank pedal. The crank pedal drives the front sprocket to rotate, and the controller controls the chain to switch between the front sprocket wheels. However, the rotational speed of the crank pedal is equal to the front teeth. The rotation speed of the disk is also equal to the rotation speed of the chain', and the speed of the chain is faster than that of the crank pedal. The main purpose of the invention is to modify the front sprocket set to cause it to occur. The speed of the chain is faster than that of the 5 1343343 shank pedal. A bicycle crank shifting gear set includes: a stationary star gear, the inner circumference forming a ratchet tooth; a plate, the center of the plate is set a hole, one side of the plate is coaxial with the shaft hole without a sleeve, the shaft hole and the sleeve are pivotally fixed to a crank shaft; the flywheel toothed disc is pivoted on the sleeve, and the outer circumference is formed a ratchet tooth; at least two planetary gears are axially disposed on one side of the plate, the two planetary gears mesh with the ratchet teeth of the sun gear; at least two sprockets are coaxially disposed on the plate with the two planetary gears Between the flywheels of the flywheel; a chain of a plurality of sprocket wheels and the flywheel sprocket of the flywheel. [Embodiment] As shown in the second, fourth and fifth figures, the crankshaft shifting gear set of the bicycle of the present invention comprises : a sun gear (20), the inner circumference forms a ratchet tooth (21). A rear broadcast (22) is disposed on one side of the sun gear (2〇), and the periphery thereof is fixed to the sun gear by a plurality of fixing elements (221) (2〇) is provided with a shaft hole (222) in the center. A planetary toothed plate set (30) ' (please also cooperate with the fourth and fifth figures), including a smaller size than the inner diameter of the above-mentioned strange star gear (20) a plate (31), a shaft hole (32) is disposed in the center of the plate (31); at least two planetary gears (33) (34) are axially disposed on one side of the plate (31), and two planetary gears ( 33) The center of (34) is in line with the center of the shaft hole (32) of the above plate (31); part of the tooth edges of the two planetary gears (33) (34) protrudes from the plate (31) 'profit and the above star The ratchet teeth (21) of the gear (2〇) are meshed; at least two power balance wheels (35) (36) are respectively meshed with the two planetary gears (33) (34), and are axially disposed on the plate (31) Side; at least two sprocket wheels (37) (38) Coaxially disposed on the other side of the plate (31) coaxially with the two transmission gears (35) (36), the plate (31) and the two transmission gears (35) (36) are on the same side of the shaft hole (32) 6 1343343,. Set a bushing (39). - a flywheel (10)) is pivoted over the sleeve (39) with a tooth (4) on the outer circumference; a starter wheel (50) is inserted over the sleeve (39) on the outside of the flywheel (10) The outer circumference has ratchet teeth (51). As shown in the sixth and seventh figures, the combination of the upper opening members is intended to be pivotally fixed to the shaft tube (61) outside the bicycle crank pedal (60) by the shaft hole (222) of the rear insertion (22), which is a stationary member. . The inner shaft (62) of the crank pedal (6〇) is fixed to the shaft hole (32) of the plate (31) and the sleeve (39). The two ends are engaged with a crank (63) (63'). The crank (10) is further fixed to the starting wheel (10) by a fixing member (10), so that the crank (63) can drive the starting wheel (5〇) and the plate (31) to rotate. A conventional bicycle chain (70) can be chained to the starter wheel (50) or the flywheel sprocket (40) under the control of a conventional bicycle front shifting device (not shown). When the chain (7〇) chain is hung on the flywheel (4〇), the flywheel (40) and the at least one sprocket (37) (38) jointly mesh the chain (7〇). The above-mentioned plate (31) is driven by the crank (63), and since the plate (31)-side two planetary gears (33) (34) are sprayed with the ratchet teeth (21) of the comet gear (20), the planet The gear (33) (34) will revolve (rotate around the sun gear (20)) and rotate. Since the two transmission gears (35) (3β) mesh with the planetary gears (33) (34), respectively, the planetary gears (33) (34) rotate to rotate the transmission gears (35) (36); The wheel (37) (38) is coaxial with the transmission gear (35) (36), so that the two-key wheel (37) (38) is also driven to drive the key bar (70) to which the 柩 tooth is attached. The rotating, rotating key strip (70) further drives the flywheel sprocket wheel (40) to provide the inertial force of the chain (7 〇) rotation and maintain the shape of the chain (70) by using the flywheel sprocket wheel (4 〇) . As shown in Figures 8A, 8B, and 8C, the present invention has at least two key wheels (37) (38), and two 7 1343343. The structure of the present invention is applied to a bicycle other than a bicycle, such as an electric two-wheeled vehicle, a scooter or the like. Vehicles with shifting gears are also suitable. Although the present invention is described in terms of a preferred embodiment, those skilled in the art can make various changes in the form without departing from the spirit and scope of the invention. The above embodiments are merely illustrative of the present invention and have not been used to limit the scope of the present invention. All kinds of modifications or changes that are not in violation of the spirit of this case are the scope of patent application in this case. [Simple description of the drawings] The first round is a general overview of the bicycle. The second figure is a schematic top view of a conventional bicycle front and rear derailleur. The third figure is a three-dimensional exploded view of the shifting tooth plate of the present invention. The fourth circle is a front view of the combination of the planetary gear set and the sun gear in the shifting gear set of the present invention. The fifth drawing is a rear view of the combination of the planetary gear set and the sun gear in the shifting gear set of the present invention. Fig. 6 is a sectional view showing the combination of the shifting gear set of the present invention mounted on a bicycle crank pedal, in which the chain is pivoted on the starting wheel. Fig. 7 is a sectional view showing the combination of the shifting gear set of the present invention mounted on a bicycle crank pedal, in which the chain is pivoted on the flywheel sprocket and the sprocket. Fig. 8A is a schematic view showing the action of the 8A-8A section in the seventh figure and the rotation of the shifting gear of the present invention. The eighth figure B is a schematic diagram of the action of the shifting gear to drive the chain to rotate along the eighth drawing. The eighth C diagram is a schematic diagram of the action of the shifting gear to drive the chain to rotate along the eighth panel. 9 1343343. [Main component symbol description] 20- Stellar gear 21- Ratchet tooth 22- Rear gear 221-Fixed component 222_Axis hole 30- Planetary toothed disc set 31- Plate 32- Shaft hole 33- Planetary gear 34- Planetary gear 35- Transmission Gear 36- Transmission Gear 37-Sprocket 38- Sprocket 39- Bushing 40- Flywheel Sprocket 41- Ratchet Tooth 50- Starter Wheel 51- Ratchet Tooth 60- Crank Pedal 61- Outer Tube 62- Inner Sleeve 63, 63'-Crank 631-Fixed element 70-Chain