TWM492292U - Power module of electric bicycle - Google Patents

Description

電動自行車動力模組Electric bicycle power module

本創作係關於電動自行車的技術領域，特別是一種利用一高轉速與一低扭力電機配合一減速器而輸出一低轉速與一高扭力的一動力源，以及利用一驅動單元決定以該動力源或一人力動力源作為輸出動力源的電動自行車動力模組。The present invention relates to the technical field of electric bicycles, in particular to a power source that uses a high speed and a low torque motor to cooperate with a speed reducer to output a low speed and a high torque, and uses a driving unit to determine the power source. Or a human power source as an output power source for the electric bicycle power module.

傳統中，一電動自行車(下稱車體)採用一前輪輪鼓式馬達或一後輪輪鼓式馬達；但該等馬達的配置存在許多缺失，其一，該車體的重心集中在該車體的前部或者該車體的後部，該重心的位置將會降低該車體的平衡度，進而影響騎乘穩定性；其二，由於該前輪輪鼓式馬達設置在一前輪，以及該後輪輪鼓式馬達設置於一後輪，如此的配置將在該前輪或該後輪維修的過程中，增加維修的困難度；以及，其三，由於該前輪輪鼓式馬達直接地輸出於一前輪或該後輪輪鼓式馬達直接地輸出於一後輪。因此，該前輪輪鼓式馬達或該後輪輪鼓式馬達無法配合一自行車變速齒輪提供變速的功能。Traditionally, an electric bicycle (hereinafter referred to as a vehicle body) uses a front wheel drum motor or a rear wheel drum motor; however, there are many missing configurations of the motors. First, the center of gravity of the vehicle body is concentrated in the vehicle. The front of the body or the rear of the body, the position of the center of gravity will reduce the balance of the body, thereby affecting the riding stability; and second, because the front wheel drum motor is disposed on a front wheel, and thereafter The wheel drum motor is disposed on a rear wheel, such a configuration will increase the difficulty of maintenance during the maintenance of the front wheel or the rear wheel; and, thirdly, because the front wheel drum motor is directly outputted to one The front wheel or the rear wheel drum motor is directly output to a rear wheel. Therefore, the front wheel drum motor or the rear wheel drum motor cannot function as a shifting gear to provide a shifting function.

為解決上述的缺失，先前技術將該馬達移動至該車體的中間 部，使得該重心可以自該車體前部或該車體後部轉移至該車體中間部，該馬達一般可稱為中置電機。該中置電機必須具有一低轉速與一高扭力的輸出，以滿足車體的騎乘需求。因此，該中置電機為了獲得該低轉速與該高扭力的動力源輸出，該中置電機需要另外加裝具有一低減速比的一行星減速器，以達成該低轉速與該高扭力的一動力源輸出。In order to solve the above-mentioned deficiency, the prior art moves the motor to the middle of the vehicle body. The center of gravity can be transferred from the front of the vehicle body or the rear of the vehicle body to the middle portion of the vehicle body. The motor can be generally referred to as a center motor. The center motor must have a low speed and a high torque output to meet the ride requirements of the vehicle body. Therefore, in order to obtain the low-speed and the high-torque power source output, the center-mounted motor needs to additionally install a planetary reducer having a low reduction ratio to achieve the low-speed and the high-torque Power source output.

然而，受限於該行星減速器的減速比較低，而無法大幅降低該中置電機的轉速及大幅提升該中置電機的扭力。因此，若要能夠達到該低轉速與該高扭力的該動力源輸出，則需要採用一中低轉速及一中高扭力的電機，才能滿足騎乘所需該低轉速與該高扭力的輸出需求。但是，該中低轉速及中高扭力的電機相較於一高轉速與一低扭力的電機，其存在有體積大、重量重與成本高等缺失。However, the deceleration limited by the planetary reducer is relatively low, and the rotation speed of the center motor cannot be greatly reduced and the torque of the center motor is greatly increased. Therefore, if the low-speed and the high-torque power source output can be achieved, a medium-low speed and a medium-high torque motor are needed to meet the output demand of the low speed and the high torque required for riding. However, the medium-low speed and medium-high torque motors have the disadvantages of large volume, heavy weight and high cost compared with a high-speed and low-torque motor.

有鑑於此，本創作提出一種電動自行車動力模組，以解決習知技術的缺失。In view of this, the present invention proposes an electric bicycle power module to solve the lack of the prior art.

《本創作之第一目的提供一種電動自行車動力模組，藉由具有一高減速比的一減速器，該減速器可將一高轉速與一低扭力的一電機轉換成一低轉速與一高扭力的一電機動力源，讓該電動自行車動力模組具有低轉速、高扭力、體積小、重量輕與成本低等優勢。The first objective of the present invention is to provide an electric bicycle power module, which converts a high speed and a low torque motor into a low speed and a high torque by means of a speed reducer having a high reduction ratio. A motor power source makes the electric bicycle power module have the advantages of low speed, high torque, small size, light weight and low cost.

本創作之第二目的根據上述電動自行車動力模組，可製做一體積小與高扭力的一中置電機，該中置電機除可以讓一電動自行車的車體重心穩定之外，也方便維修該電動自行車的一前輪或一後輪，以及配合一 自行車變速齒輪達到變速等目的。The second purpose of the present invention is to make a small-sized and high-torque one-center motor according to the above-mentioned electric bicycle power module, which can make the weight of an electric bicycle stable and convenient for maintenance. a front wheel or a rear wheel of the electric bicycle, and a matching one The bicycle shifting gear achieves the purpose of shifting.

本創作之第三目的根據上述電動自行車動力模組，藉由一偏心軸、一軸承、一圓形外齒齒輪、一環狀內齒齒輪與一限位盤組成一減速器，而藉由調整該圓形外齒齒輪的輪齒數量與該環狀內齒齒輪的輪齒數量，讓該減速器具有該高減速比。The third object of the present invention is to form a speed reducer by using an eccentric shaft, a bearing, a circular external gear, a ring internal gear and a limit plate according to the above electric bicycle power module, and by adjusting The number of teeth of the circular external gear and the number of teeth of the annular internal gear allow the reducer to have the high reduction ratio.

本創作之第四目的根據上述電動自行車動力模組，藉由複數環狀體與一共用法蘭盤形成複數單向軸承，該等單向軸承可接收來自於該減速器輸出的該電機動力源以及來自於人力的一人力動力源。The fourth object of the present invention is to form a plurality of one-way bearings by a plurality of annular bodies and a common flange according to the above electric bicycle power module, the one-way bearings receiving the motor power source from the output of the reducer and A human power source from manpower.

為達到上述的目的與其它目的，本創作提供一種電動自行車動力模組包含一第一動力單元、一減速單元、一第二動力單元與一驅動單元。該第一動力單元具有一第一轉速以及一第一扭力。基於該第一轉速與該第一扭力的乘積，該第一動力單元輸出一第一馬力。該減速單元耦接該第一動力單元。該減速單元將該第一轉速降低至一第二轉速，讓該第一扭力提升成一第二扭力。基於該第二轉速與該第二扭力的乘積，該減速單元輸出一第二馬力。該第二動力單元輸出一第三轉速以及一第三扭力的一第三馬力。該驅動單元耦接該減速單元與該第二動力單元，以輸出該第二馬力或該第三馬力。To achieve the above and other objects, the present invention provides an electric bicycle power module including a first power unit, a speed reduction unit, a second power unit and a drive unit. The first power unit has a first rotational speed and a first torque. The first power unit outputs a first horsepower based on a product of the first rotational speed and the first torque. The speed reduction unit is coupled to the first power unit. The deceleration unit reduces the first rotational speed to a second rotational speed to increase the first torque to a second torque. The deceleration unit outputs a second horsepower based on a product of the second rotational speed and the second torque. The second power unit outputs a third rotational speed and a third horsepower of a third torque. The driving unit is coupled to the deceleration unit and the second power unit to output the second horsepower or the third horsepower.

與習知技術相較，本創作的一電動自行車動力模組，可藉由一高減速比的一減速單元，將一高轉速與一低扭力電機(價格低與體積小的優勢)，轉換成具有一低轉速與一高扭力的輸出動力源。該體積小的優勢，將有助於設置在一電動自行車的中間部，以同時地解決習知技術的缺失。Compared with the prior art, an electric bicycle power module of the present invention can convert a high speed and a low torque motor (the advantage of low price and small volume) into a speed reduction unit with a high reduction ratio. An output power source with a low speed and a high torque. This small size advantage will help to be placed in the middle of an electric bicycle to simultaneously address the lack of prior art.

此外，該電動自行車動力模組可以接收複數動力源(例如一 電機動力源與一人力動力源)，尤其是該模組可不借助任何的切換器，而能夠選擇該等動力源之其中一者以驅動該電動自行車。In addition, the electric bicycle power module can receive a plurality of power sources (for example, one The motor power source and a human power source), in particular, the module can select one of the power sources to drive the electric bicycle without any switch.

10‧‧‧電動自行車動力模組10‧‧‧Electric bicycle power module

12‧‧‧第一動力單元12‧‧‧First Power Unit

14‧‧‧減速單元14‧‧‧Deceleration unit

142‧‧‧偏心軸142‧‧‧Eccentric shaft

144‧‧‧軸承144‧‧‧ bearing

146‧‧‧圓形外齒齒輪146‧‧‧round external gear

1462‧‧‧第一輪齒1462‧‧‧First gear

1464‧‧‧限位柱1464‧‧‧Limited Column

148‧‧‧環狀內齒齒輪148‧‧‧Ring internal gear

1482‧‧‧第二輪齒1482‧‧‧second gear

1410‧‧‧限位盤1410‧‧‧ Limit disk

14102‧‧‧圓孔14102‧‧‧ round hole

16‧‧‧第二動力單元16‧‧‧Second power unit

18‧‧‧驅動單元18‧‧‧ drive unit

182‧‧‧第一環狀體182‧‧‧First ring

184‧‧‧第二環狀體184‧‧‧Second annular body

186‧‧‧共用法蘭盤186‧‧‧share flange

HP₁ ‧‧‧第一馬力HP ₁ ‧‧‧First horsepower

HP₂ ‧‧‧第二馬力HP ₂ ‧‧‧Second horsepower

HP₃ ‧‧‧第三馬力HP ₃ ‧‧‧ third horsepower

HPS‧‧‧人力動力源HPS‧‧‧Human Power Source

第1圖係本創作實施例之電動自行車動力模組的***示意圖。Fig. 1 is a schematic exploded view of an electric bicycle power module of the present embodiment.

第2圖係說明第1圖中一實施例中減速單元的詳細示意圖。Fig. 2 is a detailed schematic view showing a reduction unit in an embodiment of Fig. 1.

第3圖係說明第1圖中一實施例中驅動單元的詳細示意圖。Fig. 3 is a detailed schematic view showing a driving unit in an embodiment of Fig. 1.

為充分瞭解本創作之目的、特徵及功效，茲藉由下述具體之實施例，並配合所附之圖式，對本創作做一詳細說明，說明如後：請參考第1圖，係本創作實施例之電動自行車動力模組的***示意圖。在第1圖中，該電動自行車動力模組10包含一第一動力單元12、一減速單元14、一第二動力單元16與一驅動單元18。In order to fully understand the purpose, features and effects of this creation, we will give a detailed explanation of this creation by the following specific examples and with the accompanying drawings. For the following: Please refer to Figure 1 for the creation. Explosion diagram of the electric bicycle power module of the embodiment. In FIG. 1 , the electric bicycle power module 10 includes a first power unit 12 , a speed reduction unit 14 , a second power unit 16 and a driving unit 18 .

該第一動力單元12具有一第一轉速以及一第一扭力，例如該第一動力單元12為一電機(即馬達)。於本實施例中，該電機以一高轉速與一低扭力輸出為例說明。該第一動力單元12輸出一第一馬力HP₁ (horsepower)。馬力的定義為該第一轉速與該第一扭力的乘積。The first power unit 12 has a first rotational speed and a first torque. For example, the first power unit 12 is a motor (ie, a motor). In this embodiment, the motor is illustrated by a high speed and a low torque output. The first power unit 12 outputs a first horsepower HP ₁ (horsepower). Horsepower is defined as the product of the first rotational speed and the first rotational force.

該減速單元14耦接該第一動力單元12，以接收來自於該第一動力單元12所輸出的該第一馬力HP₁ 。該減速單元14的功能係將該第一轉速降低至一第二轉速，以及讓該第一扭力提升至一第二扭力。該減速單元14 輸出一第二馬力HP₂ 。值得注意的是，該第二扭力大於該第一扭力。於本實施例中，該減速單元14的組成可以參考第2圖的詳細結構圖。The speed reduction unit 14 is coupled to the first power unit 12 to receive the first horsepower HP ₁ outputted from the first power unit 12 . The function of the speed reduction unit 14 is to lower the first speed to a second speed and to increase the first torque to a second torque. The reduction unit 14 outputs a second horsepower HP ₂ . It is worth noting that the second torque is greater than the first torque. In the present embodiment, the composition of the speed reduction unit 14 can be referred to the detailed structure diagram of FIG. 2.

在第2圖中，該減速單元14包含一偏心軸142、一軸承144、一圓形外齒齒輪146、一環狀內齒齒輪148與一限位盤1410。該偏心軸142與該軸承144組裝後，一同貫穿該圓形外齒齒輪146。該圓形外齒齒輪146結合該限位盤1410。該圓形外齒齒輪146局部地齧合該環狀內齒齒輪148。In FIG. 2, the reduction unit 14 includes an eccentric shaft 142, a bearing 144, a circular external gear 146, an annular internal gear 148 and a limit plate 1410. The eccentric shaft 142 is assembled with the bearing 144 and penetrates the circular externally toothed gear 146 together. The circular external gear 146 is coupled to the limit plate 1410. The circular externally toothed gear 146 partially engages the annular internally toothed gear 148.

該偏心軸142的中心孔軸與該減速單元14的中心同軸，其中該偏心軸142的管壁厚度不均。The center hole axis of the eccentric shaft 142 is coaxial with the center of the reduction unit 14, wherein the wall thickness of the eccentric shaft 142 is uneven.

該圓形外齒齒輪146在外緣具有複數第一輪齒1462，該等第一輪齒1462的數量為一第一齒數T1。該圓形外齒齒輪146局部地齧合該環狀內齒齒輪148。該圓形外齒齒輪146設置有複數限位柱1464，供與該限位盤1410結合。The circular externally toothed gear 146 has a plurality of first teeth 1462 on the outer edge, and the number of the first gears 1462 is a first number of teeth T1. The circular externally toothed gear 146 partially engages the annular internally toothed gear 148. The circular external gear 146 is provided with a plurality of limit posts 1464 for engagement with the limit plate 1410.

該環狀內齒齒輪148在內緣具有複數第二輪齒1482。該等第二輪齒1482的數量為一第二齒數T2。The annular internally toothed gear 148 has a plurality of second teeth 1482 on the inner edge. The number of the second gear teeth 1482 is a second number of teeth T2.

該限位盤1410包含有複數圓孔14102。該等圓孔14102的直徑大於該等限位柱1464的直徑。The limit plate 1410 includes a plurality of circular holes 14102. The diameter of the circular holes 14102 is greater than the diameter of the limit posts 1464.

該減速單元14的動作原理：當該偏心軸142轉動時，該偏心軸142經由該軸承144推動該圓形外齒齒輪146。由於該偏心軸142的管壁厚度不均勻，因此該圓形外齒齒輪146作動時，該圓形外齒齒輪146的軸心並非固定的。再者，該圓形外齒齒輪146本身不會隨著該偏心軸142旋轉(即該圓形外齒齒輪146不以自己的軸心作旋轉動作)。該圓形外齒齒輪146僅是藉由該等限位柱1464而被限制在該等圓孔14102作微小的移動。在移動的過程 中，該圓形外齒齒輪146部份的該等第一輪齒1462會不斷地齧合該環狀內齒齒輪148之部份的該等第二輪齒1482。由於該等第一輪齒1462與該等第二輪齒1482之間齒數數目不相同，因此造成該環狀內齒齒輪148緩慢地旋轉。The principle of operation of the reduction unit 14 is that the eccentric shaft 142 pushes the circular external gear 146 via the bearing 144 when the eccentric shaft 142 is rotated. Since the thickness of the wall of the eccentric shaft 142 is not uniform, the axis of the circular externally toothed gear 146 is not fixed when the circular externally toothed gear 146 is actuated. Moreover, the circular externally toothed gear 146 itself does not rotate with the eccentric shaft 142 (ie, the circular externally toothed gear 146 does not rotate with its own axis). The circular externally toothed gear 146 is only limited to the minute movements of the circular holes 14102 by the limit posts 1464. In the process of moving The first gear teeth 1462 of the portion of the circular externally toothed gear 146 will continuously engage the second gear teeth 1482 of a portion of the annular internal gear 148. Since the number of teeth between the first gear teeth 1462 and the second gear teeth 1482 is different, the annular internally toothed gear 148 is caused to rotate slowly.

該減速單元14之一減速比RR(reduction ratio)的定義為該第二齒數T2與一齒數差D的比值。該齒數差D為該第一齒數T1與該第二齒數T2之間的齒差。因此，該減速比RR的數學運算式如下所示：RR=T2/DThe reduction ratio RR (reduction ratio) of the deceleration unit 14 is defined as a ratio of the second number of teeth T2 to a difference in the number of teeth D. The tooth difference D is a tooth difference between the first number of teeth T1 and the second number of teeth T2. Therefore, the mathematical expression of the reduction ratio RR is as follows: RR=T2/D

值得注意的是，本創作的該減速單元14之該減速比RR遠大於傳統一行星減速器的減速比。It should be noted that the reduction ratio RR of the reduction unit 14 of the present invention is much larger than the reduction ratio of the conventional planetary reducer.

該第二動力單元16輸出一第三轉速以及一第三扭力的一第三馬力HP3。於本實施例中，該第二動力單元16係以一踏板驅動器為例說明，一使用者可藉由該踏板驅動器輸出一人力動力源HPS(human power source)。The second power unit 16 outputs a third rotational speed and a third horsepower HP3 of a third torque. In this embodiment, the second power unit 16 is illustrated by a pedal driver. A user can output a human power source (HPS) by the pedal driver.

該驅動單元18耦接該減速單元14與該第二動力單元16，以輸出該第二馬力HP2或該第三馬力HP3。一併參考第3圖所示，第3圖係說明第1圖中該驅動單元的詳細結構圖。該驅動單元18具有一第一環狀體182、一第二環狀體184與一共用法蘭盤186。The driving unit 18 is coupled to the deceleration unit 14 and the second power unit 16 to output the second horsepower HP2 or the third horsepower HP3. Referring to Fig. 3 together, Fig. 3 is a detailed structural view of the drive unit in Fig. 1. The drive unit 18 has a first annular body 182, a second annular body 184 and a common flange 186.

該第一環狀體182與該第二環狀體184分別地耦合該共用法蘭盤186。該第一環狀體182與該共用法蘭盤186結合成一第一單向軸承，以及該第二環狀體184與該共用法蘭盤186結合成一第二單向軸承。該第一單向軸承輸出該第二馬力HP2或該第二單向軸承輸出該第三馬力HP3。值得注意的是，該第一環狀體182以該第二轉速轉動，以及該第二環狀體184以該 第三轉速轉動。該共用法蘭盤186根據該第二轉速與該第三轉速之中大者，耦合該第一環狀體182或耦合該第二環狀體184，即該轉速大者的該第一環狀體182或該第二環狀體184，將可以牽動該共用法蘭盤186輸出該第二馬力HP2或該第三馬力HP3。The first annular body 182 and the second annular body 184 are coupled to the common flange 186, respectively. The first annular body 182 is combined with the common flange 186 to form a first one-way bearing, and the second annular body 184 is combined with the common flange 186 to form a second one-way bearing. The first one-way bearing outputs the second horsepower HP2 or the second one-way bearing outputs the third horsepower HP3. It should be noted that the first annular body 182 is rotated at the second rotational speed, and the second annular body 184 is The third rotational speed is rotated. The common flange 186 is coupled to the first annular body 182 or to the second annular body 184 according to the second of the second rotational speed and the third rotational speed, that is, the first annular shape of the rotational speed is greater. The body 182 or the second annular body 184 will be able to pull the common flange 186 to output the second horsepower HP2 or the third horsepower HP3.

舉例而言，一第一動力單元12輸出轉速3000每分鐘轉速(Revolution Per Minute，rpm)以及扭力1牛頓米(Newton-meter)的一電機動力源，以及該減速單元14的該減速比RR為30。當該第一動力單元12連接該減速單元14之後，該減速單元14輸出一轉速100rpm以及扭力30牛頓米的一動力源。相較於該第一動力單元12原有的該電機動力源輸出，該電機動力源的轉速由3000rpm(高轉速)降至100rpm(低轉速)，以及該扭力由1Nm(低扭力)提升至30Nm(高扭力)。For example, a first power unit 12 outputs a rotational speed of 3000 per minute (Revolution Per Minute, rpm) and a motor power source of a torque of 1 Newton-meter, and the reduction ratio RR of the reduction unit 14 is 30. After the first power unit 12 is connected to the speed reduction unit 14, the speed reduction unit 14 outputs a power source having a rotation speed of 100 rpm and a torque of 30 Newton meters. Compared with the original motor power source output of the first power unit 12, the rotational speed of the motor power source is reduced from 3000 rpm (high speed) to 100 rpm (low speed), and the torque is increased from 1 Nm (low torque) to 30 Nm. (high torque).

本創作在上文中已以較佳實施例揭露，然熟習本項技術者應理解的是，該實施例僅用於描繪本創作，而不應解讀為限制本創作之範圍。應注意的是，舉凡與該實施例等效之變化與置換，均應設為涵蓋於本創作之範疇內。因此，本創作之保護範圍當以申請專利範圍所界定者為準。The present invention has been disclosed in the above preferred embodiments, and it should be understood by those skilled in the art that the present invention is only intended to depict the present invention and should not be construed as limiting the scope of the present invention. It should be noted that variations and permutations equivalent to those of the embodiments are intended to be included within the scope of the present invention. Therefore, the scope of protection of this creation is subject to the definition of the scope of patent application.

10‧‧‧電動自行車動力模組10‧‧‧Electric bicycle power module

12‧‧‧第一動力單元12‧‧‧First Power Unit

14‧‧‧減速單元14‧‧‧Deceleration unit

16‧‧‧第二動力單元16‧‧‧Second power unit

18‧‧‧驅動單元18‧‧‧ drive unit

HP₁ ‧‧‧第一馬力HP ₁ ‧‧‧First horsepower

HP₂ ‧‧‧第二馬力HP ₂ ‧‧‧Second horsepower

HP₃ ‧‧‧第三馬力HP ₃ ‧‧‧ third horsepower

HPS‧‧‧人力動力源HPS‧‧‧Human Power Source

Claims (4)

一種電動自行車動力模組，係包含：一第一動力單元，係具有一第一轉速以及一第一扭力，基於該第一轉速與該第一扭力的乘積，該第一動力單元輸出一第一馬力；一減速單元，係耦接該第一動力單元，該減速單元將該第一轉速降低至一第二轉速，以及將該第一扭力提升至一第二扭力，基於該第二轉速與該第二扭力的乘積，該減速單元輸出一第二馬力；一第二動力單元，係輸出一第三轉速以及一第三扭力的一第三馬力；以及一驅動單元，係耦接該減速單元與該第二動力單元，該驅動單元輸出該第二馬力或該第三馬力。 An electric bicycle power module includes: a first power unit having a first rotational speed and a first torque; and based on a product of the first rotational speed and the first rotational force, the first power unit outputs a first a speed reduction unit is coupled to the first power unit, the speed reduction unit reduces the first rotation speed to a second rotation speed, and raises the first torque to a second torque, based on the second rotation speed The second torque unit outputs a second horsepower; a second power unit outputs a third rotation speed and a third horsepower of a third torque; and a driving unit coupled to the speed reduction unit and The second power unit outputs the second horsepower or the third horsepower. 如申請專利範圍第1項所述之電動自行車動力模組，其中該減速單元包含一偏心軸、一軸承、一圓形外齒齒輪、一環狀內齒齒輪與一限位盤，該偏心軸與該軸承組裝之後，一同貫穿該圓形外齒齒輪，該圓形外齒齒輪結合該限位盤，以及該圓形外齒齒輪局部地齧合該環狀內齒齒輪。 The electric bicycle power module according to claim 1, wherein the speed reduction unit comprises an eccentric shaft, a bearing, a circular external gear, an annular internal gear and a limit plate, and the eccentric shaft After assembly with the bearing, the circular externally toothed gear is coupled together, the circular externally toothed gear is coupled to the limit plate, and the circular externally toothed gear partially engages the annular internally toothed gear. 如申請專利範圍第2項所述之電動自行車動力模組，其中該圓形外齒齒輪具有一第一齒數，以及該環狀內齒齒輪具有一第二齒數，該第一齒數與該第二齒數之間具有一齒數差，該第二齒數與該齒數差的比值為一減速比。 The electric bicycle power module of claim 2, wherein the circular external gear has a first number of teeth, and the annular internal gear has a second number of teeth, the first number of teeth and the second There is a tooth difference between the number of teeth, and the ratio of the second number of teeth to the difference in the number of teeth is a reduction ratio. 如申請專利範圍第1項所述之電動自行車動力模組，其中該驅動單元包含一第一環狀體、一第二環狀體以及一共用法蘭盤，該第一環狀體與該第二環狀體分別地耦合該共用法蘭盤以形成一第一單向軸承與一第二單向軸承，該第一環狀體連接該減速單元，以及該第二環狀體連接該第二動力單元，該第一環狀體以該第二轉速轉動，以及該第二環狀體以該第三轉速轉動，根據該第二轉速與該第三轉速之中轉速大者，讓該共用法蘭盤受到該第一環狀體或該第二環狀體的牽引，以在該共同法蘭盤輸出該第二馬力或該第三馬力。 The electric bicycle power module according to claim 1, wherein the driving unit comprises a first annular body, a second annular body and a common flange, the first annular body and the second The annular body is coupled to the common flange to form a first one-way bearing and a second one-way bearing, the first annular body is connected to the speed reducing unit, and the second annular body is connected to the second power a unit, the first annular body rotates at the second rotational speed, and the second annular body rotates at the third rotational speed, and the common flange is made according to the second rotational speed and the third rotational speed The disk is pulled by the first annular body or the second annular body to output the second horsepower or the third horsepower at the common flange.