M437304 五、新型說明·· 【新型所屬之技術領域】 . 本創作與電助力自行車有關，特別是有關於一種電助 力自行車之中置動力輸出機構。 【先前技術】 曰本特開平11-255177號專利案揭露出一種「電動自 行車」，其主要是在馬達與後鏈盤之間安裝一傳動裝置，傳 動裝置具有一行星齒輪減速機與馬達之出力軸連接，可將 ’馬達所輸出的動力經減速之後再傳遞至後鏈盤，藉以驅動 後鏈盤轉動。 就此專利案之行星齒輪減速機的結構來說，主要具有 一行星支架與一行星齒輪，其中的行星支架具有複數凸 柱，行星齒輪則具有複數穿孔供該等凸柱穿設，當行星支 .受到馬達之驅動而產生偏心轉動時，行星支架之該等凸 柱將會分別推頂行星齒輪之該等穿孔的孔壁，讓行星齒輪 _ 隨之轉動而達到動力輸出的目的。 絲在前述設計中，行星支架之凸柱與行星齒輪之穿 孔之間在運轉的過程中會不斷地產生磨耗，久而久之便會 造成兩者之間的運轉精度變差’進而影響整體結構的正常 _ 運作，同時也會導致使用壽命的縮短。 【新型内容】 本創作之主要目的在於提供一種電助力自行車之中置 動力輸出機構，其運轉精度佳且使用壽命長。 為達成上述目的’本創作之中置動力輸出機構包含有 3 M437304 一殼體、一曲柄組、一内齒環、一助力輸出單元、一傳動 單兀，以及一減速單元。該曲柄組具有一曲柄軸及一傳動 套件’該曲柄軸可轉動地穿設於該殼體，該傳動套件連接 該曲柄軸；該内齒環設於該殼體内；該助力輸出單元具有 —轉子，該轉子可轉動地套設於該曲柄軸；該傳動單元套 f於該曲柄軸且具有一第一傳動件與一第二傳動件，該第 傳動件連接該助力輸出單元之轉子，該第二傳 =一傳動料可無第—傳動相步轉動；該減速單^ =該殻體内且套設於該曲柄軸，並具有至少—行星齒輪 輪 二星支架’該行星齒輪咬合該内齒環且與該傳動 之第二傳動件形成偏連接 且藉由-單向器與二^件=星支架連接該行星齒 助力輪出單元之轉子開始轉動時，該傳動單元之 2傳動件會受到該轉子之帶動而轉動 會受到該傳動單元望_ 者μ仃星齒輪 動，接菩傳動件的帶動而繞著該内齒環轉 祕:著該行星支架會受到該行星齒輪的 動套件進行單向轉動，以達到助力輸出的效^ 傳 齒二作=置動力輸出機構利用該行星 :能夠達到輸_::=== =:’並且能延長整體結構的使用壽二 構及功效進行詳細說明 下較佳實施例，用以對本創作之結 ’為本創作一較佳實施例之中置 设體20、一曲柄組30、一内 50、一傳動單元60，以及一減 請先參閲第一至三圖 動力輸出機構10，包含有 齒環40 ' —助力輸出單元 迷單元70。 殼體20是由兩側蓋22相互對接而成。 二^配合參閱第三及四圖，曲柄組3G具有4柄軸32、 处，傳動套件362伸〜^大減36具有一傳動套件 柄轴32連接。 ’2G内且精由-單向器38與曲 内齒環？其外環面固定於殼體20之内壁面。 及固定於殼體2°㈣子52 時’即可―相:定子^^ 傳動單元6〇且右— …第，㈣套62及—第二傳動件 知之轉子54，可a t於曲柄軸32料接助力輸出單元 杜 又轉子54之帶動而同步轉動；第二傳動 同I連接於第―傳動件62之一端而可與第〆傳動件62 :V轉動並自其外周面徑向地向外突伸出相對之二凸輪 邛642 ’如第四及五圖所示。 減速單几70具有二行星齒輪72、一行星支架74，以 _複數連接件76。該兩行星齒輪72咬合㈣環4G且分別 軸承80套接於第二傳動件料之凸輪部642，使得 該兩仃星齒輪72之間會因為該兩&輪部642之間的相對位 關係而具有⑽侧目位差；行星支架74套設於曲柄轴 η且错由—單向11 78與大齒盤36之傳動套件362連接； ，接件76穿設於該兩行星齒輪72，並以其—端連接其 說明St絲72H連接行星絲74。另外需要補充 齒輪72的數目只要至少—個即可達到應有 此設置兩個的目的是為了可以產生良好的 動件#—個行星絲72的狀態下，第二傳 接即可提供一個凸輪部642讓行星齒輪Μ能夠套 會受射知，當騎乘者開始騎乘時，曲柄軸32 柄34的帶動而開始轉動，並在轉動的過程中 =早:…驅動大齒盤36之 轉大齒盤36來達到動力輸出的目的。 备要輸出助力時，先對定子52通 :傳=5二轉動的過程中會同步帶_單元二 星齒輪72會m —_件&同步轉動’接著該兩行 而繞著内齒第m64之凸輪部⑷的推頂 齒輪72在物過財會再魏該兩行星 支架㈣動，此時的行星支架74會=:二來驅動行星 大齒盤36之傳動态杜g由早向器78來驅動 %來達到助力輸出細果進行單向轉動，藉以帶動大齒盤 齒輪 一傳動件64之間的偏心連接來 M437304 讓行星支架74能夠達到輸出動力的目的，可確保整體結構 具有良好的運轉精度，並且能夠減少各構件之間的磨耗來 達到延長使用壽命的目的。 M437304 【圖式簡單說明】 第一圖為本創作一較佳實施例之局部立體圖。 第二圖為本創作一較佳實施例之局部立體分解圖。 第三圖為本創作一較佳實施例之平面圖。 第四圖為本創作一較佳實施例之局部縱向剖視圖。 第五及六圖為本創作一較佳實施例之局部橫向剖視 圖，主要顯示行星齒輪繞著内齒環轉動的狀態。 【主要元件符號說明】 10中置動力輸出機構 20殼體 22側蓋 30曲柄組 32曲柄轴 34曲柄 36大齒盤 362傳動套件 38單向器 40内齒環 50助力輸出單元 52定子 54轉子 60傳動單元 62第一傳動件 64第二傳動件 642凸輪部 70減速單元 72行星齒輪 74行星支架 76連接件 78單向器 80軸承M437304 V. New description·· 【New technology field】 This creation is related to electric bicycles, especially for an electric power assist bicycle. [Prior Art] Patent No. Hei 11-255177 discloses an "electric bicycle" which mainly mounts a transmission between the motor and the rear chain plate, and the transmission has a planetary gear reducer and a motor output. The shaft connection can transmit the power output by the motor to the rear chain plate after decelerating, thereby driving the rear chain plate to rotate. In the structure of the planetary gear reducer of this patent, there is mainly a planetary carrier and a planetary gear, wherein the planetary carrier has a plurality of convex columns, and the planetary gears have a plurality of perforations for the convex columns to be pierced, when the planetary branches. When the eccentric rotation is driven by the motor, the protrusions of the planet carrier will respectively push the perforated holes of the planetary gears, so that the planetary gears _ turn to achieve the power output. In the aforementioned design, the between the projections of the planet carrier and the perforations of the planetary gears will continue to wear during the operation, and the running accuracy between the two will be deteriorated over time, which will affect the normality of the overall structure. Operation will also lead to a shortened service life. [New content] The main purpose of this creation is to provide an electric power assisted bicycle with a power output mechanism, which has excellent running precision and long service life. In order to achieve the above objectives, the present invention includes a 3 M437304 housing, a crank set, an internal ring gear, a boost output unit, a transmission unit, and a reduction unit. The crankset has a crankshaft and a transmission kit rotatably disposed in the housing, the transmission sleeve is coupled to the crankshaft; the internal gear ring is disposed in the housing; the power output unit has a rotor that is rotatably sleeved on the crankshaft; the transmission unit sleeve f is coupled to the crankshaft and has a first transmission member and a second transmission member, the first transmission member being coupled to the rotor of the power assist output unit, The second transmission = a transmission material can be rotated without the first-drive phase step; the deceleration unit ^ = inside the casing and sleeved on the crank shaft, and has at least - a planetary gear wheel two-star bracket 'the planetary gear bites the internal tooth When the ring is connected to the second transmission member of the transmission and the rotor of the planetary gear assisting wheel-out unit starts to rotate by the one-way device and the two-piece=star bracket, the transmission member of the transmission unit is subjected to The rotation of the rotor is caused by the movement of the transmission unit, and the movement of the transmission gear is transmitted around the internal gear ring. The planetary carrier is subjected to the movement of the planetary gear. Turn to achieve The effect of the force output is 2: the power output mechanism utilizes the planet: can achieve the transmission _::=== =: ' and can extend the overall structure of the structure and the efficacy of the overall structure, the preferred embodiment For the purpose of creating a preferred embodiment of the present invention, a body 20, a crank set 30, an inner 50, a transmission unit 60, and a deduction of the first to third diagrams The output mechanism 10 includes a ring gear 40'-assisted output unit unit 70. The housing 20 is formed by abutting the two side covers 22 to each other. Referring to Figures 3 and 4, the crankset 3G has four shafts 32, and the transmission kit 362 extends ~^large 36 with a transmission kit shank 32 connection. ‘2G and fine-to-one-way 38 and curved inner ring? The outer annular surface is fixed to the inner wall surface of the housing 20. And fixed to the housing 2 ° (four) sub-52 when the 'same phase: stator ^ ^ transmission unit 6 〇 and right - ..., (4) sleeve 62 and - the second transmission known to the rotor 54, can be placed on the crank shaft 32 The auxiliary output unit is driven by the rotor 54 to rotate synchronously; the second transmission is coupled to one end of the first transmission member 62 to be rotatable with the second transmission member 62: V and radially outwardly from the outer peripheral surface thereof. Extending the opposite two cams 642' as shown in the fourth and fifth figures. The deceleration table 70 has two planet gears 72, a planet carrier 74, and a plurality of connectors 76. The two planetary gears 72 are engaged with the (four) ring 4G and the bearing 80 is respectively sleeved on the cam portion 642 of the second transmission member, so that the relative position relationship between the two & wheel portions 642 may be between the two satellite gears 72. And having a (10) lateral position difference; the planetary bracket 74 is sleeved on the crankshaft η and is connected by the one-way 11 78 to the transmission kit 362 of the large toothed disc 36; the connecting member 76 is disposed through the two planetary gears 72, and The end-to-end connection thereof indicates that the St wire 72H is connected to the planet wire 74. In addition, the number of the supplemental gears 72 needs to be at least one to achieve the purpose of setting the two for the purpose of generating a good moving member #- a planetary wire 72, the second transfer can provide a cam portion 642 allows the planetary gear Μ to be able to receive the shot. When the rider starts to ride, the crankshaft 32 handle 34 starts to rotate, and during the rotation = early: ... drives the large sprocket 36 to turn The toothed disc 36 is used for the purpose of power output. When outputting the assist force, first pass to the stator 52: pass = 5 two rotation process will be synchronous belt _ unit two-star gear 72 will m - _ piece & synchronous rotation 'and then the two lines around the inner teeth m64 The ejector gear 72 of the cam portion (4) is moved by the two planet brackets (four) at the time of the object, and the planetary bracket 74 at this time will drive the dynamics of the planet sprocket 36 to be driven by the early directional device 78. % to achieve the assist output fineness for one-way rotation, so as to drive the eccentric connection between the large gear wheel and the transmission member 64. The M437304 allows the planetary carrier 74 to achieve the output power, which ensures the overall structure has good running precision. And it can reduce the wear between the components to achieve the purpose of extending the service life. M437304 [Simple Description of the Drawings] The first drawing is a partial perspective view of a preferred embodiment of the creation. The second figure is a partial exploded perspective view of a preferred embodiment of the present invention. The third figure is a plan view of a preferred embodiment of the present invention. Figure 4 is a partial longitudinal cross-sectional view of a preferred embodiment of the present invention. The fifth and sixth figures are partial transverse cross-sectional views of a preferred embodiment of the present invention, mainly showing the state in which the planetary gears are rotated about the inner ring gear. [Main component symbol description] 10 center power output mechanism 20 housing 22 side cover 30 crank set 32 crank shaft 34 crank 36 large toothed disk 362 transmission kit 38 one-way device 40 internal tooth ring 50 power output unit 52 stator 54 rotor 60 Transmission unit 62 first transmission member 64 second transmission member 642 cam portion 70 reduction unit 72 planetary gear 74 planetary carrier 76 connecting member 78 one-way device 80 bearing