TW202031545A

TW202031545A - Transmission device of electric bicycle

Info

Publication number: TW202031545A
Application number: TW108127176A
Authority: TW
Inventors: 鄭志清
Original assignee: 穩正企業股份有限公司
Priority date: 2019-02-27
Filing date: 2019-07-31
Publication date: 2020-09-01

Abstract

The present invention provides a transmission device of an electric bicycle, which comprises an external rotor motor, a shaft gear, a crank shaft and a single-stage reduction transmission assembly. The external rotor motor includes a stator assembly, a rotor assembly, and a housing. The rotor assembly is disposed to the housing. The shaft gear includes a joint portion and a gear portion, and the joint portion is disposed to the housing. The single-stage reduction transmission assembly surrounds the crankshaft, and the single-stage reduction transmission assembly includes a transmission gear. Wherein, a central axis of the shaft gear is substantially parallel and non-coaxial with a central axis of the crankshaft, and the transmission gear directly engages with the gear portion. Thereby, the transmission device of the electric bicycle according to the present invention has the advantages of simple assembly and low cost.

Description

電動助行車的傳動裝置Transmission device of electric walker

本發明係關於一種傳動裝置，尤指一種電動助行車的傳動裝置。The invention relates to a transmission device, in particular to a transmission device of an electric walker.

隨著國人對於休閒及運動並重的風氣興起，越來越多的人考量騎乘自行車，以兼具休閒及運動的效果。不僅如此，隨著油價的日益高漲，考量以自行車當作交通工具的，亦有日益上升的驅勢。With the rise of the Chinese people's enthusiasm for both leisure and sports, more and more people consider riding bicycles to have both leisure and sports effects. Not only that, with the increasing price of oil, considering the use of bicycles as a means of transportation, there is also an increasing trend.

為改善騎乘者的體力負擔，具有輔助動力的電動助行車日益興起。電動助行車常見的有將馬達裝設於前輪或後輪上的輪轂馬達，及將馬達裝設於曲柄軸上的中置馬達。由於中置馬達之傳動效率優於輪轂馬達之傳動效率，故，目前電動助行車的趨勢係朝向中置馬達發展。In order to improve the physical burden of riders, electric walkers with auxiliary power are increasingly emerging. Commonly used electric walkers are a hub motor with the motor installed on the front or rear wheels, and a central motor with the motor installed on the crankshaft. Since the transmission efficiency of the mid-mounted motor is better than that of the hub motor, the current trend of electric walkers is toward the mid-mounted motor.

中置馬達可分為內轉子馬達及外轉子馬達，其中，內轉子馬達為轉子設置於馬達的中心軸體上，運作時轉子與馬達的中心軸體共同轉動；而外轉子馬達為轉子設置於馬達的殼體上，運作時馬達中心軸體不動，而轉子與馬達的殼體共同轉動。由於內轉子馬達具有體積小、輕量化等優點，故為中置馬達的常見型式。惟，相較於外轉子馬達而言，內轉子馬達雖具有體積小、輕量化等優點，但扭矩上較為不足。Mid-mounted motors can be divided into inner-rotor motors and outer-rotor motors. The inner-rotor motors have the rotor installed on the central shaft of the motor, and the rotor and the central shaft of the motor rotate together during operation; and the outer-rotor motors have the rotor installed on the central shaft. On the housing of the motor, the central shaft of the motor does not move during operation, and the rotor and the housing of the motor rotate together. Because the inner rotor motor has the advantages of small size and light weight, it is a common type of mid-mounted motor. However, compared with the outer rotor motor, although the inner rotor motor has the advantages of small size and light weight, the torque is relatively insufficient.

習知中置馬達設置於自行車上的設計，係透過內轉子馬達依序帶動複數個減速齒輪，進行多段式的減速，接著再帶動鏈盤轉動，其中，曲柄軸的中心軸與內轉子馬達的中心軸為共軸設置。惟，習知採用複數個減速齒輪的多段式減速方式，不僅組裝上複雜，且其成本上亦更為昂貴(如：元件成本、組裝成本等)。The conventional design of a mid-mounted motor installed on a bicycle uses an inner rotor motor to sequentially drive a plurality of reduction gears to perform multi-stage deceleration, and then drive the chain disc to rotate. Among them, the central axis of the crankshaft and the inner rotor motor The central axis is a coaxial setting. However, the conventional multi-stage reduction method using multiple reduction gears is not only complicated in assembly, but also more expensive in cost (such as component cost, assembly cost, etc.).

有鑑於此，本發明係提供一種電動助行車的傳動裝置，以改善習知技術所存在的問題。In view of this, the present invention provides a transmission device for an electric walker to improve the problems existing in the prior art.

本發明係提供一種電動助行車的傳動裝置，其包含一外轉子馬達、一軸型齒輪、一曲柄軸及一單段式減速傳動組件。外轉子馬達包含一定子組件、一轉子組件及一殼體。轉子組件設置於殼體。軸型齒輪包含一接合部及一齒輪部，接合部設置於殼體。單段式減速傳動組件環繞於曲柄軸上，單段式減速傳動組件包含一傳動齒輪。其中，軸型齒輪的中心軸與曲柄軸的中心軸呈實質平行且非共軸，且傳動齒輪直接嚙合於齒輪部。藉此，本發明電動助行車的傳動裝置具有組裝簡易、成本低等功效。The invention provides a transmission device for an electric walker, which includes an outer rotor motor, a shaft gear, a crankshaft and a single-stage reduction transmission assembly. The outer rotor motor includes a stator assembly, a rotor assembly and a housing. The rotor assembly is arranged on the housing. The shaft gear includes a joint part and a gear part, and the joint part is arranged on the housing. The single-stage reduction transmission assembly surrounds the crankshaft, and the single-stage reduction transmission assembly includes a transmission gear. Wherein, the central axis of the shaft gear and the central axis of the crankshaft are substantially parallel and non-coaxial, and the transmission gear directly meshes with the gear part. Thereby, the transmission device of the electric walker of the present invention has the functions of simple assembly and low cost.

又，本發明傳動齒輪的材質可採用塑膠，藉此，本發明電動助行車的傳動裝置更具有輕量化的效果。In addition, the material of the transmission gear of the present invention can be made of plastic, so that the transmission device of the electric walker of the present invention has a lighter weight effect.

且，本發明傳動齒輪的齒數與齒輪部的齒數可互為質數關係，藉此，本發明傳動齒輪與齒輪部會更為耐用。In addition, the number of teeth of the transmission gear of the present invention and the number of teeth of the gear portion can have a prime relationship with each other, so that the transmission gear and the gear portion of the present invention will be more durable.

再者，本發明電動助行車的傳動裝置可包含一阻力件，阻力件係相對於曲柄軸而設置，藉此，可改善騎乘者的舒適性。Furthermore, the transmission device of the electric walker of the present invention may include a resistance member, which is arranged relative to the crankshaft, thereby improving the comfort of the rider.

以下本文所對照的圖示，係用以說明本發明技術特徵及較佳(或最佳)實施態樣，未必全然依照真實比例與精確配置關係予與繪製，故，本文所對照的圖示並不作為侷限或限縮本發明技術特徵及較佳(或最佳)實施態樣，合先敘明。The following diagrams compared in this article are used to illustrate the technical features and preferred (or best) implementation aspects of the present invention. They may not be drawn in full accordance with the true proportions and precise configuration relationships. Therefore, the diagrams compared in this article are not It is not as a limitation or limitation to the technical features and preferred (or best) implementation aspects of the present invention.

請參閱第1圖及第2圖，第1圖為本發明電動助行車的傳動裝置運用於自行車的示意圖，第2圖為本發明第1圖所示的傳動裝置沿曲柄軸方向的剖視示意圖。本發明電動助行車的傳動裝置10係運用於一自行車1上，自行車1的下管2上設置一電池3，電池3用以提供電力與傳動裝置10，以帶動自行車1前進。藉此，可對騎乘者產生助行的效果，減輕其體力負擔。本發明所述電動助行車指透過人力自行踩踏並輔以電力助動的交通工具，但並不以此為限。又，本發明傳動裝置10可運用於自行車上，但並不以此為限，舉凡透過本發明傳動裝置10以帶動任何交通工具者，皆屬於本發明傳動裝置10的適用範疇。Please refer to Figures 1 and 2. Figure 1 is a schematic diagram of the transmission device of the electric walker of the present invention applied to a bicycle, and Figure 2 is a schematic cross-sectional view of the transmission device shown in Figure 1 of the present invention along the crank axis direction . The transmission device 10 of the electric walker of the present invention is applied to a bicycle 1. A battery 3 is provided on the down tube 2 of the bicycle 1. The battery 3 is used to provide power and a transmission device 10 to drive the bicycle 1 forward. In this way, the effect of assisting the rider can be produced and the physical burden can be reduced. The electric walker in the present invention refers to a vehicle that is stepped on by human power and assisted by electricity, but is not limited to this. In addition, the transmission device 10 of the present invention can be applied to bicycles, but is not limited to this. Any vehicle that drives any vehicle through the transmission device 10 of the present invention belongs to the applicable scope of the transmission device 10 of the present invention.

本發明電動助行車的傳動裝置10包含一外轉子馬達11、一軸型齒輪13、一曲柄軸15、一單段式減速傳動組件17及一外殼18。外轉子馬達11包含一定子組件111、一轉子組件112及一殼體113。其中，轉子組件112設置於殼體113的內表面1131上，而當轉子組件112環繞著定子組件111轉動時，帶動殼體113進行轉動。又，外殼18用以至少容置外轉子馬達11、軸型齒輪13、曲柄軸15及單段式減速傳動組件17，其中，外殼18可為單一外殼型式，或由多個(如2個、3個等)次外殼組裝而成，但並不以此為限。The transmission device 10 of the electric walker of the present invention includes an outer rotor motor 11, a shaft-type gear 13, a crankshaft 15, a single-stage reduction transmission assembly 17 and a housing 18. The outer rotor motor 11 includes a stator assembly 111, a rotor assembly 112 and a housing 113. The rotor assembly 112 is arranged on the inner surface 1131 of the housing 113, and when the rotor assembly 112 rotates around the stator assembly 111, the housing 113 is driven to rotate. In addition, the housing 18 is used to house at least the outer rotor motor 11, the shaft gear 13, the crankshaft 15 and the single-stage reduction transmission assembly 17. The housing 18 can be a single housing type, or a plurality of (such as two, 3, etc.) sub-shells are assembled, but not limited to this.

軸型齒輪13包含一接合部131及一齒輪部132。其中，接合部131設置於殼體113，以本實施例而言，更進一步的說，殼體113的中心軸孔1132用以容設接合部131，使得當殼體113轉動時，得以帶動軸型齒輪13進行轉動，但並不以此為限，於其它實施例(圖未示)中，接合部可設置於殼體的開口處、殼體的一端等，但並不以此為限。以本實施例而言，部分的齒輪部132係位於殼體113的內部。此外，軸型齒輪13的中心軸133與曲柄軸15的中心軸151呈實質平行且非共軸。其中，本發明所述的實質平行且非共軸，係指可為絕對平行，或兩者(軸型齒輪13的中心軸133與曲柄軸15的中心軸151)的延伸可交錯，而具有一微小角度，如0度至10度之間，但並不以此為限。The shaft gear 13 includes a joint portion 131 and a gear portion 132. Wherein, the engaging portion 131 is disposed on the housing 113. In this embodiment, further speaking, the central shaft hole 1132 of the housing 113 is used to accommodate the engaging portion 131, so that when the housing 113 rotates, the shaft can be driven. The type gear 13 rotates, but is not limited to this. In other embodiments (not shown), the joint may be provided at the opening of the housing, one end of the housing, etc., but is not limited to this. In this embodiment, part of the gear portion 132 is located inside the housing 113. In addition, the central axis 133 of the shaft gear 13 and the central axis 151 of the crank shaft 15 are substantially parallel and non-coaxial. Wherein, the term “substantially parallel and non-coaxial” in the present invention means that they can be absolutely parallel, or the extension of both (the central axis 133 of the shaft gear 13 and the central axis 151 of the crankshaft 15) can be staggered and have a Small angles, such as between 0 degrees and 10 degrees, but not limited to this.

單段式減速傳動組件17係環繞於曲柄軸15上，單段式減速傳動組件17包含一傳動齒輪171、一培林172及一固定塊173，而傳動裝置10更包含一鏈盤19。其中，傳動齒輪171的中心軸孔171a用以容設培林172，培林172的中心軸孔172a用以容設固定塊173，而固定塊173設置於鏈盤19上。其中，單段式減速傳動組件17的傳動齒輪171直接嚙合於軸型齒輪13的齒輪部132。又，本實施例所述的培林172，係為一單向培林，但並不以此為限。此外，本發明所述的中心軸孔171a及172a，係用以容設另一元件/組件，而使其兩者可呈共軸設計。而以本實施例而言，傳動齒輪171、培林172及固定塊173係呈共軸設計。The single-stage reduction transmission assembly 17 surrounds the crankshaft 15. The single-stage reduction transmission assembly 17 includes a transmission gear 171, a bearing 172 and a fixed block 173, and the transmission device 10 further includes a chain plate 19. Among them, the central shaft hole 171 a of the transmission gear 171 is used to accommodate the bearing 172, the central shaft hole 172 a of the bearing 172 is used to receive a fixed block 173, and the fixed block 173 is disposed on the chain plate 19. Among them, the transmission gear 171 of the single-stage reduction transmission assembly 17 directly meshes with the gear portion 132 of the shaft gear 13. In addition, the bearing 172 described in this embodiment is a one-way bearing, but it is not limited to this. In addition, the central axis holes 171a and 172a of the present invention are used for accommodating another element/component so that the two can be coaxially designed. In this embodiment, the transmission gear 171, the bearing 172, and the fixing block 173 are coaxially designed.

此外，為設計或製造上的便利性，傳動齒輪171可包含一傳動齒環171b及一中間環171c，而中間環171c容設於傳動齒環171b的中心軸孔171bb內，而於其它實施例(圖未示)中，傳動齒輪亦可為一體成型或為多個中間部件及傳動齒環的組合，但並不以此為限。其中，傳動齒輪171的材質為塑膠，而於其它實施例(圖未示)中，傳動齒環的材質為塑膠，而中間環可為其它材質，但並不以此為限。In addition, for the convenience of design or manufacturing, the transmission gear 171 may include a transmission gear ring 171b and an intermediate ring 171c, and the intermediate ring 171c is accommodated in the central shaft hole 171bb of the transmission gear ring 171b. In other embodiments (Not shown in the figure), the transmission gear can also be integrally formed or a combination of a plurality of intermediate parts and a transmission gear ring, but it is not limited to this. Wherein, the material of the transmission gear 171 is plastic, and in other embodiments (not shown), the material of the transmission gear ring is plastic, and the intermediate ring can be made of other materials, but it is not limited thereto.

本發明所述的塑膠，採用具有耐磨耗性質的塑膠或具有添加其它耐磨耗材質(如金屬、玻璃纖維等)的塑膠，前述二者例如聚甲醛樹脂(如：1. Polyoxymethylene, POM、2 奪鋼 DURACON：M90-44等)、聚四氟乙烯(Polytetrafluoroethene, PTFE；又名鐵氟龍)、尼龍材(如M90-44、MC901、MC602ST等)等，但並不以此為限，舉凡具有耐磨耗性質的塑膠或具有添加其它耐磨耗材質的塑膠者，皆屬於本發明所述塑膠的範疇。The plastic of the present invention adopts a plastic with abrasion resistance properties or a plastic with other abrasion resistance materials (such as metal, glass fiber, etc.) added, the foregoing two are for example polyoxymethylene resin (such as: 1. Polyoxymethylene, POM, 2 DURACON: M90-44, etc.), polytetrafluoroethene (PTFE; also known as Teflon), nylon materials (such as M90-44, MC901, MC602ST, etc.), but not limited to this. All plastics with wear resistance properties or plastics with other wear resistant materials are included in the scope of the plastics of the present invention.

本發明傳動裝置10更包含一固態潤滑油16，固態潤滑油16介於傳動齒輪171與齒輪部132之間，其中，固態潤滑油16可採用如黃油，但並不以此為限，舉凡可用以金屬件與塑膠件間作為潤滑的效果者，皆屬於本發明所述固態潤滑油16的範疇。The transmission device 10 of the present invention further includes a solid lubricating oil 16, which is interposed between the transmission gear 171 and the gear portion 132. The solid lubricating oil 16 can be, for example, butter, but is not limited to this. Those who use the lubrication effect between the metal part and the plastic part belong to the category of the solid lubricant 16 of the present invention.

由於本發明傳動裝置10採用單段式減速傳動組件17，無需採用複數個減速齒輪的多段式減速方式，不僅組裝上更為簡易，且更可節省成本(如元件成本、組裝成本)等。又，本發明傳動齒輪171的材質可採用塑膠，相較於習知複數個減速齒輪係採用金屬件而言，更具有輕量化的優勢。更者，由於本發明傳動齒輪171與齒輪部132係互為不同材質，即傳動齒輪171的材質為塑膠，而齒輪部132的材質為金屬，在兩材質的硬度不相同之下，傳動齒輪171與齒輪部132之間方可採用固態潤滑油16，而無需採用複雜的油封組件，也因此，本發明傳動裝置10具有組裝簡易、成本低、輕量化等功效。Since the transmission device 10 of the present invention adopts a single-stage reduction transmission assembly 17 and does not need to adopt a multi-stage reduction mode of multiple reduction gears, it is not only easier to assemble, but also cost-saving (such as component cost and assembly cost). In addition, the material of the transmission gear 171 of the present invention can be made of plastic, which has the advantage of lighter weight compared with the conventional multiple reduction gear trains using metal parts. Furthermore, since the transmission gear 171 and the gear portion 132 of the present invention are made of different materials, that is, the material of the transmission gear 171 is plastic, and the material of the gear portion 132 is metal, and the hardness of the two materials is different, the transmission gear 171 The solid lubricating oil 16 can be used between the gear part 132 and the gear part 132 without using complicated oil seal components. Therefore, the transmission device 10 of the present invention has the functions of simple assembly, low cost, and light weight.

請參閱第3圖~第4圖，第3圖為本發明第2圖所示的單段式減速傳動組件的示意圖，第4圖為本發明第2圖所示的軸型齒輪的示意圖。本發明單段式減速傳動組件17的傳動齒輪171為一斜齒輪，而軸型齒輪13的齒輪部132亦為一斜齒輪，且齒輪部132沿軸型齒輪13的中心軸133方向係呈一螺旋狀，換言之，齒輪部132沿軸型齒輪13的中心軸133方向為螺旋沿伸。由於本發明係採用外轉子馬達，具有較大扭矩，而斜齒輪因具有更大的接觸面積，適合傳遞較大扭矩。但並不以此為限，舉凡兩者(傳動齒輪171及371與軸型齒輪13)間得以直接嚙合而產生相對轉動者，無論任何齒輪種類、齒形等，皆屬於本發明所述傳動齒輪171及371與軸型齒輪13的範疇。Please refer to Figures 3 to 4. Figure 3 is a schematic diagram of the single-stage reduction transmission assembly shown in Figure 2 of the present invention, and Figure 4 is a schematic diagram of the shaft gear shown in Figure 2 of the present invention. The transmission gear 171 of the single-stage reduction transmission assembly 17 of the present invention is a helical gear, and the gear portion 132 of the shaft gear 13 is also a helical gear, and the gear portion 132 is formed along the direction of the central axis 133 of the shaft gear 13 The spiral shape, in other words, the gear portion 132 extends in a spiral along the direction of the central axis 133 of the shaft gear 13. Because the present invention adopts an external rotor motor, it has a larger torque, and the helical gear has a larger contact area and is suitable for transmitting larger torque. However, it is not limited to this. For example, those two (the transmission gears 171 and 371 and the shaft gear 13) are directly meshed to produce relative rotation, regardless of any gear type, tooth profile, etc., belong to the transmission gear of the present invention. 171 and 371 and the category of shaft gear 13.

由本發明所列舉的實施態樣可知，由於本發明係採用外轉子馬達，因此，具有傳遞較大扭矩的優點。且，由於本發明軸型齒輪13並非與外轉子馬達之中心軸體一體成型，也因此，當外轉子馬達損壞時，僅需更換外轉子馬達，而無需更換軸型齒輪13，具有方便替換及維修的優點。更者，雖外轉子馬達略有體積較大及較重情形，惟，透過第一：將傳動齒輪171採塑膠材質，以具有輕量化；第二：軸型齒輪13直接嚙合於傳動齒輪171，以單段式減速傳動組件17帶動鏈盤19轉動下，更具有結構簡單、易組裝、輕量化等優點；第三：傳動齒輪171與齒輪部132之間可採用固態潤滑油16，無需採用複雜的油封組件，因此，更具有組裝簡易、成本低、輕量化等優點。藉此，本發明傳動裝置10不僅具有外轉子馬達的較大扭矩，更具有方便替換及維修、結構簡單、易組裝、輕量化、成本低等優點。It can be seen from the embodiments listed in the present invention that since the present invention uses an external rotor motor, it has the advantage of transmitting larger torque. Moreover, because the shaft gear 13 of the present invention is not integrally formed with the central shaft body of the outer rotor motor, when the outer rotor motor is damaged, only the outer rotor motor needs to be replaced instead of the shaft gear 13, which is convenient for replacement and The advantages of maintenance. What’s more, although the external rotor motor is slightly larger and heavier, first: the transmission gear 171 is made of plastic material to have a lighter weight; second: the shaft gear 13 directly meshes with the transmission gear 171, The single-stage reduction transmission assembly 17 drives the chain disc 19 to rotate, which has the advantages of simple structure, easy assembly, and light weight; third: solid lubricating oil 16 can be used between the transmission gear 171 and the gear part 132, without the need for complicated Therefore, it has the advantages of easy assembly, low cost and light weight. Therefore, the transmission device 10 of the present invention not only has the larger torque of the outer rotor motor, but also has the advantages of convenient replacement and maintenance, simple structure, easy assembly, light weight, low cost, and the like.

請參閱第5圖，第5圖為本發明第2圖所示的傳動齒輪直接嚙合於軸型齒輪的齒輪部的示意圖。本發明傳動齒輪171直接嚙合於軸型齒輪13的齒輪部132，其中，齒輪部132的齒數至少為3齒(如：3齒、4齒、5齒…等) ，但並不以此為限。較佳的，以本實施例而言，當馬達固定塊的輸出扭力最大設為35Nm且最大轉速為1000rpm時，齒輪部132的最少齒數為3齒。又，較佳的，傳動齒輪171與齒輪部132的齒數比為至少15倍以上，此亦包含15倍本身，但並不以此為限。由於本發明採單段式減速傳動組件17，若需達到一定的減速比，可能會有齒輪體積過大致傳動裝置10之整體體積過大的情形。也因此，為達一定的減速比，且避免整體體積過大，齒輪部132的齒數以越少齒數為佳。而為達到最少齒數又有足夠強度足以帶動傳動齒輪171，也因此，本發明齒輪部132的齒數採用3齒並搭配螺旋狀的齒輪部132，以符合最少齒數及足夠強度的要求。換言之，本發明齒輪部132的齒數最佳為3齒，且傳動齒輪171與齒輪部132的齒數比為至少15倍(含)以上時，將具有較佳的減速比，更可避免整體體積過大的情形。Please refer to Fig. 5. Fig. 5 is a schematic diagram of the transmission gear shown in Fig. 2 of the present invention directly meshing with the gear portion of the shaft gear. The transmission gear 171 of the present invention directly meshes with the gear portion 132 of the shaft gear 13, wherein the number of teeth of the gear portion 132 is at least 3 teeth (eg, 3 teeth, 4 teeth, 5 teeth, etc.), but not limited to this . Preferably, in this embodiment, when the maximum output torque of the motor fixing block is set to 35 Nm and the maximum rotation speed is 1000 rpm, the minimum number of teeth of the gear portion 132 is 3 teeth. Furthermore, preferably, the gear ratio between the transmission gear 171 and the gear portion 132 is at least 15 times or more, which also includes 15 times itself, but is not limited to this. Since the present invention adopts the single-stage reduction transmission assembly 17, if a certain reduction ratio is required, the volume of the gear may be too large as the overall volume of the transmission device 10. Therefore, in order to achieve a certain reduction ratio and avoid the overall volume from being too large, the number of teeth of the gear portion 132 is preferably as small as possible. In order to achieve the minimum number of teeth and have enough strength to drive the transmission gear 171, therefore, the number of teeth of the gear portion 132 of the present invention is 3 teeth and matched with the spiral gear portion 132 to meet the requirements of the minimum number of teeth and sufficient strength. In other words, when the number of teeth of the gear portion 132 of the present invention is 3 teeth, and the gear ratio of the transmission gear 171 to the gear portion 132 is at least 15 times (inclusive), it will have a better reduction ratio and avoid excessive overall volume. Situation.

又，傳動齒輪171的齒數與齒輪部132的齒數係互為質數關係，換言之，兩者的齒數不具除1以外的公因數。此一設計的目的在於，舉例來說，若為4齒與8齒相配，當4齒的第1齒與8齒的第1齒相配合時，若兩第1齒間已有較為磨耗或略為毀損的情形，由於兩第1齒仍幾乎持續不斷地相互嚙合之下，兩第1齒間的磨損或毀損會加劇，甚至毀壞。然而，若採用互為質數關係的齒數，特定齒會持續與不同齒嚙合，進而減少或改善磨損或毀損情形，也因此，當兩者的齒數係互為質數關係時，會更為耐用。In addition, the number of teeth of the transmission gear 171 and the number of teeth of the gear portion 132 have a prime relationship with each other. In other words, the number of teeth of the two do not have a common factor other than one. The purpose of this design is, for example, if the 4 teeth are matched with the 8 teeth, when the first tooth of the 4 teeth is matched with the first tooth of the 8 teeth, if the two first teeth are worn or slightly worn In the case of damage, since the two first teeth are still almost continuously meshing with each other, the wear or damage between the two first teeth will increase or even be destroyed. However, if the number of teeth is mutually prime, the specific teeth will continue to mesh with different teeth, thereby reducing or improving the wear or damage. Therefore, when the two teeth are in a prime relationship, it will be more durable.

又，傳動齒輪171的齒形171d的齒頂171f與齒間底面171g皆呈一圓弧狀。齒輪部132的齒形132a的齒間底面132c亦係呈一圓弧狀，而齒輪部132的齒形132a的齒頂132b係呈一似線狀，換言之，齒形132a的兩齒腹132d間係非平滑連接，而使齒頂132b呈一似交點，以立體圖而言，即為一似線狀。而於其它實施例中，如第6圖所示，第6圖為本發明另一實施例的傳動齒輪直接嚙合於軸型齒輪的齒輪部的示意圖，傳動齒輪371的齒形371d的齒頂371f與齒間底面371g皆呈一近似直線的圓弧狀。齒輪部332的兩齒形332a間係呈一似方形凹槽狀，其齒間底面332c係呈一平面狀，且齒間底面332c的中間處332e略呈一凸起狀，而齒輪部332的齒形332a的齒頂332b呈一似線狀，換言之，齒形332a的兩齒腹332d間係非平滑連接，而使齒頂332b呈一似交點，以立體圖而言，即為一似線狀。In addition, the tooth top 171f and the inter-tooth bottom surface 171g of the tooth profile 171d of the transmission gear 171 are both arc-shaped. The bottom surface 132c between the teeth of the tooth profile 132a of the gear part 132 is also in a circular arc shape, and the tooth top 132b of the tooth profile 132a of the gear part 132 is in a line-like shape. In other words, the tooth profile 132a is between the two tooth flanks 132d. It is a non-smooth connection, so that the tooth top 132b presents a similar intersection point, which is a line-like shape in the perspective view. In other embodiments, as shown in Fig. 6, Fig. 6 is a schematic diagram of a transmission gear directly meshing with a gear portion of a shaft-type gear according to another embodiment of the present invention. The tooth top 371f of the tooth profile 371d of the transmission gear 371 The bottom surface 371g between the teeth is in an arc shape that is approximately straight. The two tooth shapes 332a of the gear part 332 are shaped like a square groove, the bottom surface 332c between the teeth is a flat surface, and the middle part 332e of the bottom surface 332c between the teeth is slightly convex. The tooth top 332b of the tooth profile 332a is a line-like shape. In other words, the two tooth flank 332d of the tooth profile 332a are not smoothly connected, and the tooth top 332b is like a point of intersection, which is a line-like shape in the three-dimensional view. .

請回到第2圖，本發明傳動裝置10更包含一棘輪24及一扭矩感測器26。外殼18的開口181用以容設曲柄軸15。棘輪24連接曲柄軸15。扭矩感測器26相對於曲柄軸15而設置，以本實施例而言，扭矩感測器26可設置於棘輪24上，但並不以此為限。此外，本發明所述的殼體113的中心軸孔1132及外殼18的開口181，係用以容設另一元件/組件，而使其兩者可呈共軸設計。而以本實施例而言，殼體113與接合部131間係呈共軸設計，且外殼18之開口181與曲柄軸15間係呈共軸設計。本發明外轉子馬達11與鏈盤19間的動力傳遞路徑為外轉子馬達11à軸型齒輪13à傳動齒輪171à培林172à固定塊173à 鏈盤19。在外轉子馬達11與鏈盤19間的動力傳遞上，由於棘輪24僅可單向作動，故，固定塊173並不會帶動棘輪24轉動，進而使曲柄軸15轉動。然而，由於固定塊173與棘輪24間仍有存在些微的磨擦力，使得棘輪24仍會些微轉動，進而帶動曲柄軸15產生些微轉動。本發明電動助行車主要的運作機制在於，當騎乘者在進行踩踏期間，會透過一感應機制，如：速度感應器，使得外轉子馬達11產生轉動，進而間接帶動鏈盤19轉動，以輔助騎乘者產生助行的效果。然而，當騎乘者停止踩踏時，由於外轉子馬達11仍有慣性存在，故會間接帶動曲柄軸15產生些微轉動，接著再帶動腳踏板(如第1圖所示)產生些微轉動，而使得騎乘者的腳會被略微帶動的情形。Please return to FIG. 2, the transmission device 10 of the present invention further includes a ratchet wheel 24 and a torque sensor 26. The opening 181 of the housing 18 is used to accommodate the crank shaft 15. The ratchet wheel 24 is connected to the crankshaft 15. The torque sensor 26 is disposed relative to the crankshaft 15. In this embodiment, the torque sensor 26 can be disposed on the ratchet wheel 24, but it is not limited to this. In addition, the central axis hole 1132 of the housing 113 and the opening 181 of the housing 18 of the present invention are used for accommodating another element/component, so that the two can be coaxially designed. In this embodiment, the housing 113 and the joint 131 are coaxially designed, and the opening 181 of the housing 18 and the crankshaft 15 are coaxially designed. The power transmission path between the outer rotor motor 11 and the chain disc 19 of the present invention is the outer rotor motor 11 à shaft gear 13 à transmission gear 171 à bearing 172 à fixed block 173 à chain disc 19. Regarding the power transmission between the outer rotor motor 11 and the chain disc 19, since the ratchet wheel 24 can only act in one direction, the fixed block 173 will not drive the ratchet wheel 24 to rotate, thereby causing the crankshaft 15 to rotate. However, due to the slight friction between the fixed block 173 and the ratchet wheel 24, the ratchet wheel 24 still rotates slightly, which in turn drives the crankshaft 15 to rotate slightly. The main operating mechanism of the electric walker of the present invention is that when the rider is pedaling, an induction mechanism, such as a speed sensor, causes the outer rotor motor 11 to rotate, which indirectly drives the chain plate 19 to rotate to assist The rider produces a mobility aid. However, when the rider stops pedaling, because the outer rotor motor 11 still has inertia, it will indirectly drive the crankshaft 15 to produce a slight rotation, and then drive the pedal (as shown in Figure 1) to produce a slight rotation, and A situation where the rider's feet will be slightly moved.

為改善前述腳會被略微帶動的情形，本發明傳動裝置10更包含一阻力件28。阻力件28係相對於曲柄軸15而設置，使得曲柄軸15因阻力件28的設置，而阻止或降低被些微帶動。以本實施例而言，阻力件28為一接觸式阻力件，而接觸式阻力件可為一O型環，而O型環環設於曲柄軸15，且設置於外殼18的開口181與曲柄軸15之間，以此實施例而言，由於O型環與曲柄軸15間的摩擦力，而阻止或降低了曲柄軸的些微轉動，進而改善前述腳會被略微帶動的情形，藉此，可改善騎乘者的舒適性。此外，於其它實施例中，如第7圖所示，第7圖為本發明另一實施例的傳動裝置沿曲柄軸方向的剖視示意圖，本實施例近似於第2圖所示實施例，相同或近似之處不再予與贅述，僅說明其主要差異之處，本實施例阻力件28為一接觸式阻力件，而阻力件28可設置於棘輪24與曲柄軸15之間。此外，於其它實施例中，如第8圖所示，第8圖為本發明另一實施例的傳動裝置沿曲柄軸方向的剖視示意圖，本實施例近似於第2圖所示實施例，相同或近似之處不再予與贅述，僅說明其主要差異之處，本實施例阻力件28為一非接觸式阻力件，而非接觸式阻力件可為一電磁磁鐵，其中，阻力件28可設置於棘輪24上。關於阻力件28的種類、材質與設置，並不以此為限，舉凡阻力件28係相對於曲柄軸15而設置，得以阻止或降低了曲柄軸15產生些微轉動者，皆屬於本發明所述阻力件28的範疇。In order to improve the situation in which the feet are slightly driven, the transmission device 10 of the present invention further includes a resistance member 28. The resistance member 28 is arranged relative to the crankshaft 15, so that the crankshaft 15 is prevented or reduced from being slightly driven due to the arrangement of the resistance member 28. In this embodiment, the resistance member 28 is a contact resistance member, and the contact resistance member may be an O-ring, and the O-ring is ringed on the crankshaft 15 and is provided on the opening 181 and the crank of the housing 18 Between the shafts 15, in this embodiment, due to the friction between the O-ring and the crankshaft 15, the slight rotation of the crankshaft is prevented or reduced, thereby improving the situation that the aforementioned feet will be slightly driven, thereby, It can improve the comfort of the rider. In addition, in other embodiments, as shown in Fig. 7, Fig. 7 is a schematic cross-sectional view of the transmission along the crank axis direction of another embodiment of the present invention. This embodiment is similar to the embodiment shown in Fig. 2. The similarities or similarities will not be repeated here, and only the main differences will be explained. In this embodiment, the resistance member 28 is a contact resistance member, and the resistance member 28 can be disposed between the ratchet wheel 24 and the crankshaft 15. In addition, in other embodiments, as shown in Fig. 8, Fig. 8 is a schematic cross-sectional view along the crank axis of the transmission device according to another embodiment of the present invention. This embodiment is similar to the embodiment shown in Fig. 2. The similarities or similarities will not be repeated here, and only the main differences will be explained. In this embodiment, the resistance member 28 is a non-contact resistance member, and the non-contact resistance member may be an electromagnetic magnet. Among them, the resistance member 28 Can be set on the ratchet 24. The type, material, and arrangement of the resistance member 28 are not limited thereto. Any resistance member 28 that is arranged relative to the crank shaft 15 to prevent or reduce the slight rotation of the crank shaft 15 belongs to the present invention. The category of resistance piece 28.

此外，於其它實施例中，第9圖為本發明另一實施例的傳動裝置沿曲柄軸方向的剖視示意圖，本實施例近似於第2圖所示實施例，相同或近似之處不再予與贅述，僅說明其主要差異之處，本實施例並無第2圖所示的扭矩感測器26，而阻力件28為一接觸式阻力件，而接觸式阻力件可為一O型環，而O型環環設於曲柄軸15，且設置於外殼18的開口181與曲柄軸15之間。又，本實施例相較於第2圖所示實施例而言，本實施所採用的棘輪24長度更短，也因此，本實施例傳動裝置10的整體體積可更為壓縮，具有體積更小的優點。In addition, in other embodiments, FIG. 9 is a schematic cross-sectional view of the transmission device along the crank axis direction according to another embodiment of the present invention. This embodiment is similar to the embodiment shown in FIG. 2, and the same or similarities are omitted. To repeat the description, only the main differences are explained. This embodiment does not have the torque sensor 26 shown in Figure 2, and the resistance member 28 is a contact resistance member, and the contact resistance member can be an O-shaped The O-ring is arranged around the crankshaft 15 and is arranged between the opening 181 of the housing 18 and the crankshaft 15. In addition, compared with the embodiment shown in FIG. 2, the length of the ratchet wheel 24 used in this embodiment is shorter in this embodiment. Therefore, the overall volume of the transmission device 10 of this embodiment can be more compressed and has a smaller volume. The advantages.

以上說明，僅用說明本發明技術特徵及較佳(或最佳)實施態樣，惟，並未以此為限，舉凡所屬技術領域通常知識者依據本發明技術特徵及較佳(或最佳)實施態樣，所為的任何均等修飾或設計變更，皆應屬於本發明的發明範疇。The above description is only used to illustrate the technical features and preferred (or best) implementation aspects of the present invention, but it is not limited thereto. For example, those with ordinary knowledge in the technical field can use the technical features and preferred (or best) ) In the implementation mode, any equivalent modification or design change should belong to the invention category of the present invention.

1:自行車 2:下管 3:電池 10:傳動裝置 11:外轉子馬達 111:定子組件 112:轉子組件 113:殼體 1131:內表面 1132:殼體的中心軸孔 13:軸型齒輪 131:接合部 132:齒輪部 132a、332a:齒形 132b、332b:齒頂 132c、332c:齒間底面 132d、332d:齒腹 332e:中間處 133:軸型齒輪的中心軸 15:曲柄軸 151:曲柄軸的中心軸 16:固態潤滑油 17:單段式減速傳動組件 171、371:傳動齒輪 171a:傳動齒輪的中心軸孔 171b:傳動齒環 171bb :傳動齒環的中心軸孔 171c:中間環 171d、371d:齒形 171f、371f:齒頂 171g、371g:齒間底面 172:培林 172a:培林的中心軸孔 173:固定塊 18:外殼 181:外殼的開口 19:鏈盤 24:棘輪 26:扭矩感測器 28:阻力件1: bicycle 2: down tube 3: battery 10: Transmission 11: Outer rotor motor 111: stator assembly 112: Rotor assembly 113: Shell 1131: inner surface 1132: Central axis hole of the shell 13: Shaft gear 131: Joint 132: Gear part 132a, 332a: tooth profile 132b, 332b: tooth top 132c, 332c: bottom surface between teeth 132d, 332d: tooth belly 332e: in the middle 133: Central shaft of shaft gear 15: crankshaft 151: Central axis of crankshaft 16: solid lubricants 17: Single-stage reduction transmission components 171, 371: Transmission gear 171a: Central shaft hole of transmission gear 171b: Transmission gear ring 171bb: Central shaft hole of transmission gear ring 171c: intermediate ring 171d, 371d: tooth profile 171f, 371f: tooth top 171g, 371g: bottom surface between teeth 172: Palin 172a: Bearing center axis hole 173: fixed block 18: shell 181: Shell opening 19: chain plate 24: Ratchet 26: Torque sensor 28: resistance piece

第1圖為本發明電動助行車的傳動裝置運用於自行車的示意圖；Figure 1 is a schematic diagram of the transmission device of the electric walker of the present invention applied to a bicycle;

第2圖為本發明第1圖所示的傳動裝置沿曲柄軸方向的剖視示意圖；Figure 2 is a schematic cross-sectional view of the transmission device shown in Figure 1 of the present invention along the direction of the crank shaft;

第3圖為本發明第2圖所示的單段式減速傳動組件的示意圖；Fig. 3 is a schematic diagram of the single-stage reduction transmission assembly shown in Fig. 2 of the present invention;

第4圖為本發明第2圖所示的軸型齒輪的示意圖；Figure 4 is a schematic diagram of the shaft gear shown in Figure 2 of the present invention;

第5圖為本發明第2圖所示的傳動齒輪直接嚙合於軸型齒輪的齒輪部的示意圖；Figure 5 is a schematic diagram of the transmission gear shown in Figure 2 of the present invention directly meshing with the gear portion of the shaft gear;

第6圖為本發明另一實施例的傳動齒輪直接嚙合於軸型齒輪的齒輪部的示意圖；Figure 6 is a schematic diagram of a transmission gear directly meshing with a gear portion of a shaft gear according to another embodiment of the present invention;

第7圖為本發明另一實施例的傳動裝置沿曲柄軸方向的剖視示意圖；Figure 7 is a schematic cross-sectional view of the transmission device along the crank axis direction of another embodiment of the present invention;

第8圖為本發明另一實施例的傳動裝置沿曲柄軸方向的剖視示意圖；及Figure 8 is a schematic cross-sectional view of the transmission device along the crank shaft direction of another embodiment of the present invention; and

第9圖為本發明另一實施例的傳動裝置沿曲柄軸方向的剖視示意圖。Figure 9 is a schematic cross-sectional view of the transmission device along the crank axis direction of another embodiment of the present invention.

10:傳動裝置 10: Transmission

11:外轉子馬達 11: Outer rotor motor

111:定子組件 111: stator assembly

112:轉子組件 112: Rotor assembly

113:殼體 113: Shell

1131:內表面 1131: inner surface

1132:殼體的中心軸孔 1132: Central axis hole of the shell

13:軸型齒輪 13: Shaft gear

131:接合部 131: Joint

132:齒輪部 132: Gear part

133:軸型齒輪的中心軸 133: Central shaft of shaft gear

15:曲柄軸 15: crankshaft

151:曲柄軸的中心軸 151: Central axis of crankshaft

16:固態潤滑油 16: solid lubricants

17:單段式減速傳動組件 17: Single-stage reduction transmission components

171:傳動齒輪 171: Transmission gear

171a:傳動齒輪的中心軸孔 171a: Central shaft hole of transmission gear

171b:傳動齒環 171b: Transmission gear ring

171bb:傳動齒環的中心軸孔 171bb: Central shaft hole of transmission gear ring

171c:中間環 171c: intermediate ring

172:培林 172: Palin

172a:培林的中心軸孔 172a: Bearing center axis hole

173:固定塊 173: fixed block

18:外殼 18: shell

181:外殼的開口 181: Shell opening

19:鏈盤 19: chain plate

24:棘輪 24: Ratchet

26:扭矩感測器 26: Torque sensor

28:阻力件 28: resistance piece

Claims

一種電動助行車的傳動裝置，其包含：一外轉子馬達，包含一定子組件、一轉子組件及一殼體，該轉子組件設置於該殼體；一軸型齒輪，包含一接合部及一齒輪部，該接合部設置於該殼體；一曲柄軸；以及一單段式減速傳動組件，環繞於該曲柄軸上，該單段式減速傳動組件包含一傳動齒輪，其中，該軸型齒輪的中心軸與該曲柄軸的中心軸呈實質平行且非共軸，且該傳動齒輪直接嚙合於該齒輪部。A transmission device for an electric walker, which includes: An outer rotor motor, including a stator assembly, a rotor assembly and a housing, the rotor assembly is arranged in the housing; A shaft-type gear including a joint part and a gear part, and the joint part is arranged on the housing; A crankshaft; and A single-stage reduction transmission assembly surrounds the crankshaft, and the single-stage reduction transmission assembly includes a transmission gear, Wherein, the central axis of the shaft gear and the central axis of the crankshaft are substantially parallel and non-coaxial, and the transmission gear directly meshes with the gear part.

如申請專利範圍第1項所述之電動助行車的傳動裝置，其中，該傳動齒輪為一斜齒輪，而該齒輪部為一斜齒輪，該齒輪部沿該軸型齒輪的中心軸方向係呈一螺旋狀。As described in the first item of the scope of patent application, the transmission device of the electric walker, wherein the transmission gear is a helical gear, and the gear part is a helical gear, and the gear part is arranged along the central axis of the shaft gear A spiral.

如申請專利範圍第1項所述之電動助行車的傳動裝置，其中，該傳動齒輪的齒數與該齒輪部的齒數係互為質數關係，且該傳動齒輪與該齒輪部係互為不同材質。According to the transmission device of the electric walker described in claim 1, wherein the number of teeth of the transmission gear and the number system of the gear portion are in a prime number relationship, and the transmission gear and the gear portion system are of different materials.

如申請專利範圍第1項所述之電動助行車的傳動裝置，其中，該傳動齒輪的材質為塑膠。For the transmission device of the electric walker described in item 1 of the scope of patent application, the material of the transmission gear is plastic.

如申請專利範圍第1項所述之電動助行車的傳動裝置，更包含一鏈盤，而該單段式減速傳動組件更包含一培林及一固定塊，其中，該傳動齒輪的中心軸孔用以容設該培林，該培林的中心軸孔用以容設該固定塊，而該固定塊設置於該鏈盤上。The transmission device of the electric walker described in item 1 of the scope of patent application further includes a chain plate, and the single-stage reduction transmission assembly further includes a bearing and a fixing block, wherein the central shaft hole of the transmission gear The bearing is used for accommodating the bearing, the central shaft hole of the bearing is used for accommodating the fixing block, and the fixing block is arranged on the chain disc.

如申請專利範圍第1項所述之電動助行車的傳動裝置，更包含一阻力件，該阻力件係相對於該曲柄軸而設置。As described in the first item of the scope of patent application, the transmission device of the electric walker further includes a resistance member which is arranged relative to the crankshaft.

如申請專利範圍第6項所述之電動助行車的傳動裝置，其中，該阻力件為一接觸式阻力件。As described in item 6 of the scope of patent application, the resistance member is a contact resistance member.

如申請專利範圍第7項所述之電動助行車的傳動裝置，其中，該接觸式阻力件為一O型環，而該O型環環設於該曲柄軸。According to the transmission device of the electric walker described in item 7 of the scope of patent application, the contact resistance member is an O-ring, and the O-ring is ringed on the crankshaft.

如申請專利範圍第6項所述之電動助行車的傳動裝置，更包含一外殼，該外殼的開口用以容設該曲柄軸，其中，該阻力件設置於該外殼的開口與該曲柄軸之間。。For example, the transmission device of the electric walker described in item 6 of the scope of patent application further includes a housing, and the opening of the housing is used for accommodating the crankshaft, wherein the resistance member is arranged between the opening of the housing and the crankshaft between. .

如申請專利範圍第1項所述之電動助行車的傳動裝置，其中，該殼體的中心軸孔用以容設該接合部。According to the transmission device of the electric walker described in item 1 of the scope of the patent application, the central shaft hole of the housing is used to accommodate the joint.