TW202304769A

TW202304769A - Crank arm for human-powered vehicles and crank assembly for human-powered vehicles wherein the crank arm includes a crankshaft mounting portion, a pedal shaft mounting portion, and a main body disposed between the crankshaft mounting portion and the pedal shaft mounting portion in the longitudinal direction

Info

Publication number: TW202304769A
Application number: TW110127293A
Authority: TW
Inventors: 横井健; 大石利成
Original assignee: 日商島野股份有限公司
Priority date: 2021-07-26
Filing date: 2021-07-26
Publication date: 2023-02-01

Abstract

To provide a crank arm for human-powered vehicles and a crank assembly for human-powered vehicles, which have excellent strength and rigidity and can be made lightweight. The crank arm includes: a crankshaft mounting portion having a first opening allowing the crankshaft to pass through, a pedal shaft mounting portion having a second opening allowing the pedal shaft to pass through, and a main body disposed in the longitudinal direction between the crankshaft mounting portion and the pedal shaft mounting portion. The crankshaft mounting portion has a first outer peripheral length; the main body has a largest portion, and the largest portion has a largest outer peripheral length. The reference line in the longitudinal direction passes through the first central axis and the second central axis, the centerline in the transverse direction passes through the center point between the first central axis and the second central axis, and the main body has a hollow portion overlapping with the reference line in the longitudinal direction. The largest portion of the main body at least partially surrounds the hollow portion, the length ratio of the largest outer peripheral length to the first outer peripheral length is 1.05 or more, and the distance ratio of the second longitudinal distance to the first longitudinal distance is 0.3 or more.

Description

人力驅動車用曲柄臂及人力驅動車用曲柄組件Crank arm for human-powered vehicles and crank assembly for human-powered vehicles

本發明關於人力驅動車用曲柄臂及人力驅動車用曲柄組件。The invention relates to a crank arm for a human-driven vehicle and a crank assembly for a human-driven vehicle.

例如在專利文獻1揭示有人力驅動車用曲柄臂。專利文獻1的人力驅動車用曲柄臂，形成為隨著從曲柄軸的安裝部朝向踏板軸的安裝部漸漸變細。 [先前技術文獻] [專利文獻] For example, Patent Document 1 discloses that a crank arm for a vehicle is driven by human power. The crank arm for a human-powered vehicle in Patent Document 1 is formed to become gradually thinner from the attachment portion of the crank shaft toward the attachment portion of the pedal shaft. [Prior Art Literature] [Patent Document]

[專利文獻1] 日本特開2005-47382號公報[Patent Document 1] Japanese Patent Laid-Open No. 2005-47382

[發明欲解決的課題][Problem to be solved by the invention]

本發明的一個目的，要提供一種人力驅動車用曲柄臂及人力驅動車用曲柄組件，有優異的強度及剛性且能輕量化。 [用以解決課題的手段] An object of the present invention is to provide a crank arm for a human-driven vehicle and a crank assembly for a human-driven vehicle, which have excellent strength and rigidity and can be reduced in weight. [Means to solve the problem]

本發明的第1型態的曲柄臂，是人力驅動車用曲柄臂，上述曲柄臂，具有：長邊方向參考線及與上述長邊方向參考線垂直的橫邊方向中心線；上述長邊方向參考線朝上述曲柄臂的長邊方向延伸，上述橫邊方向中心線朝上述曲柄臂的橫邊方向延伸；上述曲柄臂具備有：具有讓曲柄軸通過的第1開口的曲柄軸安裝部、具有讓踏板軸通過的第2開口的踏板軸安裝部、及在上述長邊方向配置在上述曲柄軸安裝部及上述踏板軸安裝部之間的主體；上述第1開口具有第1中心軸心；上述曲柄軸安裝部具有：通過上述第1中心軸心且沿著上述橫邊方向測定的第1外周長度；上述第2開口具有第2中心軸心；上述主體具有最大部，上述最大部具有沿著上述橫邊方向測定的最大外周長度；上述長邊方向參考線通過上述第1中心軸心及上述第2中心軸心，上述橫邊方向中心線，通過上述第1中心軸心與上述第2中心軸心之間的中心點，上述最大外周長度為上述曲柄臂的最大外周長度，上述主體具有與上述長邊方向參考線重疊的中空部；上述主體的上述最大部至少局部包圍上述中空部；第1長邊方向距離定義為：在上述長邊方向從上述第1中心軸心起至上述第2中心軸心的距離；第2長邊方向距離定義為：在上述長邊方向從上述第1中心軸心起至上述長邊方向參考線上的上述最大部的距離；上述最大外周長度相對於上述第1外周長度的長度比為1.05以上，上述第2長邊方向距離相對於上述第1長邊方向距離的距離比為0.3以上。藉由第1型態的曲柄臂，由於主體是有優異的長度及剛性的形狀，藉由薄片化而能將曲柄臂輕量化。 The crank arm of the first type of the present invention is a crank arm for a human-driven vehicle, and the crank arm has: a reference line in the longitudinal direction and a center line in the lateral direction perpendicular to the reference line in the longitudinal direction; The reference line extends toward the longitudinal direction of the above-mentioned crank arm, and the center line of the above-mentioned lateral direction extends toward the lateral direction of the above-mentioned crank arm; the pedal shaft mounting portion of the second opening through which the pedal shaft passes, and the main body disposed between the crank shaft mounting portion and the pedal shaft mounting portion in the longitudinal direction; the first opening has a first central axis; the The crank shaft mounting portion has: a first outer peripheral length measured along the lateral direction passing through the first central axis; the second opening has a second central axis; the main body has a maximum portion, and the maximum portion has a length along the The maximum outer peripheral length measured in the lateral direction; the reference line in the longitudinal direction passes through the first center axis and the second center axis, and the center line in the lateral direction passes through the first center axis and the second center The center point between the shaft centers, the maximum outer peripheral length is the maximum outer peripheral length of the crank arm, the main body has a hollow part overlapping with the reference line in the longitudinal direction; the largest part of the main body at least partially surrounds the hollow part; 1 The distance in the longitudinal direction is defined as: the distance from the first central axis to the second central axis in the longitudinal direction; the second longitudinal distance is defined as: the distance from the first center in the longitudinal direction The distance from the axis center to the above-mentioned largest part on the above-mentioned longitudinal direction reference line; the length ratio of the above-mentioned maximum outer peripheral length to the above-mentioned first outer peripheral length is 1.05 or more, and the above-mentioned second longitudinal direction distance is relative to the above-mentioned first longitudinal direction The distance ratio of the distance is 0.3 or more. With the crank arm of the first type, since the main body has an excellent length and a rigid shape, the weight of the crank arm can be reduced by thinning it out.

依據本發明的第1型態的第2型態的曲柄臂，上述距離比為0.5以下。藉由第2型態的曲柄臂，由於主體是有優異的長度及剛性的形狀，藉由薄片化而能將曲柄臂輕量化。 According to the crank arm of the second aspect of the first aspect of the present invention, the distance ratio is 0.5 or less. With the crank arm of the second type, since the main body has an excellent length and a rigid shape, the weight of the crank arm can be reduced by thinning it out.

依據本發明的第1型態的第3型態的曲柄臂，上述距離比為0.35以上0.45以下。藉由第3型態的曲柄臂，由於主體是有優異的長度及剛性的形狀，藉由薄片化而能將曲柄臂輕量化。 According to the crank arm of the third aspect of the first aspect of the present invention, the distance ratio is not less than 0.35 and not more than 0.45. With the crank arm of the third type, since the main body has an excellent length and a rigid shape, the weight of the crank arm can be reduced by thinning it out.

依據本發明的第1型態的第4型態的曲柄臂，上述長度比為1.2以上。藉由第4型態的曲柄臂，由於主體是有優異的長度及剛性的形狀，藉由薄片化而能將曲柄臂輕量化。 According to the crank arm of the fourth aspect of the first aspect of the present invention, the length ratio is 1.2 or more. With the crank arm of the fourth type, since the main body has an excellent length and a rigid shape, the weight of the crank arm can be reduced by thinning it out.

依據本發明的第1型態的第5型態的曲柄臂，上述長度比為3.0以下。藉由第5型態的曲柄臂，最大外周長度相對於第1外周長度的長度比為3.0以下，所以曲柄臂的主體不易碰撞到人力驅動車。 According to the crank arm of the fifth aspect of the first aspect of the present invention, the above-mentioned length ratio is 3.0 or less. With the crank arm of the fifth type, the length ratio of the maximum outer peripheral length to the first outer peripheral length is 3.0 or less, so the main body of the crank arm is less likely to collide with the human-powered vehicle.

依據本發明的第1型態的第6型態的曲柄臂，上述曲柄軸安裝部及上述踏板軸安裝部分別與上述主體為不同構件。藉由第6型態的曲柄臂，能針對曲柄軸安裝部及踏板軸安裝部分別選擇最適當的材料，能將曲柄臂進一步輕量化。 According to the crank arm of the sixth aspect of the first aspect of the present invention, the crankshaft mounting portion and the pedal shaft mounting portion are separate members from the main body. With the crank arm of the sixth type, it is possible to select the most appropriate material for the crank shaft mounting part and the pedal shaft mounting part respectively, and it is possible to further reduce the weight of the crank arm.

依據本發明的第6型態的第7型態的曲柄臂，上述主體的材料包含非金屬材料。藉由第7型態的曲柄臂，藉由非金屬材料可將曲柄臂進一步輕量化。 According to the crank arm of the seventh aspect of the sixth aspect of the present invention, the material of the main body includes a non-metallic material. With the crank arm of the seventh type, the weight of the crank arm can be further reduced by using non-metallic materials.

依據本發明的第7型態的第8型態的曲柄臂，上述主體的材料包含纖維強化塑膠。藉由第8型態的曲柄臂，藉由纖維強化塑膠，能既輕量又能確保曲柄臂的強度及剛性。 According to the crank arm of the eighth aspect of the seventh aspect of the present invention, the material of the main body includes fiber-reinforced plastic. With the crank arm of the 8th type, fiber-reinforced plastic can ensure the strength and rigidity of the crank arm while being lightweight.

依據本發明的第6型態的第9型態的曲柄臂，上述曲柄軸安裝部的材料及上述踏板軸安裝部的材料分別包含金屬材料。藉由第9型態的曲柄臂，藉由金屬材料，能確保承受較大負荷的曲柄軸安裝部及踏板軸安裝部的各強度及剛性。 According to the crank arm of the ninth aspect of the sixth aspect of the present invention, the material of the crankshaft mounting part and the material of the pedal shaft mounting part each include a metal material. With the crank arm of the ninth type, the respective strength and rigidity of the crank shaft mounting portion and the pedal shaft mounting portion that receive relatively large loads can be ensured by using metal materials.

依據本發明的第9型態的第10型態的曲柄臂，上述曲柄軸安裝部的材料及上述踏板軸安裝部的材料分別包含鋁。藉由第10型態的曲柄臂，藉由鋁，能確保承受較大負荷的曲柄軸安裝部及踏板軸安裝部的各強度及剛性。 According to the crank arm of the tenth aspect of the ninth aspect of the present invention, the material of the crankshaft mounting part and the material of the pedal shaft mounting part each contain aluminum. With the crank arm of the tenth type, the respective strength and rigidity of the crankshaft mounting part and the pedal shaft mounting part which receive relatively large loads can be ensured by aluminum.

依據本發明的第1型態的第11型態的曲柄臂，上述曲柄軸安裝部、上述踏板軸安裝部、及上述主體為一體成形的單一元件。藉由第11型態的曲柄臂，曲柄軸安裝部、踏板軸安裝部、及主體為一體成形的單一元件，所以能確保曲柄臂的強度及剛性。 According to the crank arm of the eleventh aspect of the first aspect of the present invention, the crankshaft mounting portion, the pedal shaft mounting portion, and the main body are integrally formed as a single member. With the crank arm of the eleventh type, the crank shaft mounting part, the pedal shaft mounting part, and the main body are integrally formed as a single component, so the strength and rigidity of the crank arm can be ensured.

依據本發明的第11型態的第12型態的曲柄臂，上述曲柄軸安裝部的材料、上述踏板軸安裝部的材料、及上述主體的材料分別包含金屬材料。藉由第12型態的曲柄臂，藉由金屬材料可確保曲柄臂的強度及剛性。 According to the crank arm of the twelfth aspect of the eleventh aspect of the present invention, the material of the crankshaft mounting part, the material of the pedal shaft mounting part, and the material of the main body each include a metal material. With the crank arm of the twelfth type, the strength and rigidity of the crank arm can be ensured by the metal material.

依據本發明的第12型態的第13型態的曲柄臂，上述曲柄軸安裝部的材料、上述踏板軸安裝部的材料、及上述主體的材料分別包含鋁或鎂。藉由第13型態的曲柄臂，藉由鋁或鎂，能既輕量又能確保曲柄臂的強度及剛性。 According to the crank arm of the thirteenth aspect of the twelfth aspect of the present invention, the material of the crankshaft mounting part, the material of the pedal shaft mounting part, and the material of the main body each contain aluminum or magnesium. With the crank arm of the thirteenth type, the strength and rigidity of the crank arm can be ensured while reducing the weight by using aluminum or magnesium.

依據本發明的第1型態的第14型態的曲柄臂，上述主體具有與上述中空部連通的開口。藉由第14型態的曲柄臂，主體能通過與中空部連通的開口，將電池、馬達、及感應器等的電子零件配置在中空部。 According to the crank arm of the fourteenth aspect of the first aspect of the present invention, the main body has an opening communicating with the hollow portion. With the crank arm of the fourteenth aspect, the main body can pass through the opening communicating with the hollow portion, and electronic components such as a battery, a motor, and a sensor can be arranged in the hollow portion.

依據本發明的第14型態的第15型態的曲柄臂，在上述曲柄臂安裝於上述人力驅動車的安裝狀態，上述開口朝向上述人力驅動車的中心面。藉由第15型態的曲柄臂，在曲柄臂安裝於人力驅動車的安裝狀態，開口朝向人力驅動車的中心面，所以有優異的設計性。 According to the crank arm of the fifteenth aspect of the fourteenth aspect of the present invention, the opening faces the center plane of the human-powered vehicle in a state where the crank arm is attached to the human-powered vehicle. With the crank arm of the fifteenth type, when the crank arm is installed on the human-powered vehicle, the opening faces the center plane of the human-powered vehicle, so it has excellent design.

依據本發明的第1型態的第16型態的曲柄臂，進一步具備有：配置在上述中空部的力量感應器。藉由第16型態的曲柄臂，由於進一步具備有：配置在中空部的力量感應器，所以能應用曲柄臂作為用來測量踩踏轉矩的功率計。 A crank arm according to a sixteenth aspect of the first aspect of the present invention further includes a force sensor disposed in the hollow portion. Since the crank arm of the sixteenth type further includes a force sensor disposed in the hollow portion, the crank arm can be used as a power meter for measuring the pedaling torque.

依據本發明的第16型態的第17型態的曲柄臂，上述力量感應器包含應變計。藉由第17型態的曲柄臂，由於力量感應器包含應變計，所以能應用曲柄臂作為用來測量踩踏轉矩的功率計。 According to the crank arm of the seventeenth aspect of the sixteenth aspect of the present invention, the force sensor includes a strain gauge. With the crank arm of the 17th type, since the force sensor includes a strain gauge, it is possible to use the crank arm as a power meter for measuring pedaling torque.

依據本發明的第1型態的第18型態的曲柄臂，進一步具備有鏈輪安裝部，上述鏈輪安裝部包含複數的花鍵齒。藉由第18型態的曲柄臂，藉由鏈輪安裝部，能將各種齒數的鏈輪安裝於曲柄臂。 The crank arm according to an eighteenth aspect of the first aspect of the present invention further includes a sprocket attachment portion including a plurality of spline teeth. According to the crank arm of the eighteenth type, sprockets having various numbers of teeth can be attached to the crank arm through the sprocket mounting portion.

依據本發明的第19型態的曲柄組件，是人力驅動車用曲柄組件，具備有：上述第1至18型態中任一型態的上述曲柄臂、及在上述曲柄組件的組裝狀態安裝於上述曲柄臂的上述曲柄軸。藉由第19型態的曲柄組件，可將具備有曲柄臂與曲柄軸的曲柄組件輕量化。 According to the crank assembly of the nineteenth type of the present invention, it is a crank assembly for a human-driven vehicle, and it is equipped with: the above-mentioned crank arm of any one of the above-mentioned 1st to 18th types, and the crank assembly is installed in the assembly state of the above-mentioned crank assembly. the aforementioned crankshaft of the aforementioned crank arm. With the crank unit of the 19th type, the weight of the crank unit including the crank arm and the crank shaft can be reduced.

依據本發明的第19型態的第20型態的曲柄組件，上述曲柄軸，包含有曲柄臂安裝部，上述曲柄臂安裝部藉由壓入方式***於上述曲柄軸安裝部的上述第1開口。藉由第20型態的曲柄組件，由於曲柄軸藉由壓入方式安裝於曲柄臂，所以有優異的強度、剛性、及組裝性。 According to the crank assembly of the twentieth aspect of the nineteenth aspect of the present invention, the crankshaft includes a crank arm mounting portion, and the crank arm mounting portion is inserted into the first opening of the crankshaft mounting portion by press fitting. . With the crank assembly of the twentieth type, since the crank shaft is mounted to the crank arm by press-fitting, it has excellent strength, rigidity, and assemblability.

依據本發明的第19型態的第21型態的曲柄組件，上述曲柄軸，包含有曲柄臂安裝部，上述曲柄臂安裝部***於上述曲柄軸安裝部的上述第1開口，且藉由黏接劑安裝於上述曲柄軸安裝部的上述第1開口。藉由第21型態的曲柄組件，由於藉由黏接劑將曲柄軸安裝於曲柄臂，所以在將曲柄軸安裝於曲柄臂的情況，曲柄臂和曲柄軸上的負荷較小，有優異的組裝性。 [發明效果] According to the crank assembly of the 21st aspect of the 19th aspect of the present invention, the crankshaft includes a crank arm mounting portion, the crank arm mounting portion is inserted into the first opening of the crankshaft mounting portion, and is glued to the crankshaft. An adhesive is attached to the first opening of the crankshaft attachment portion. With the crank unit of the 21st type, since the crankshaft is attached to the crank arm with an adhesive, when the crankshaft is attached to the crank arm, the load on the crank arm and the crankshaft is small, and excellent Assemblability. [Invention effect]

本發明的人力驅動車用曲柄臂及人力驅動車用曲柄組件，有優異的強度及剛性且能輕量化。The crank arm for a human-powered vehicle and the crank assembly for a human-powered vehicle of the present invention have excellent strength and rigidity and can be lightweight.

＜第1實施方式＞<First Embodiment>

參考圖1至圖10，針對第1實施方式的人力驅動車用曲柄組件10及人力驅動車用曲柄臂30加以說明。人力驅動車具有至少一車輪，是至少能藉由人力驅動力驅動的車輛。人力驅動車例如包含：登山車、公路車、城市型自行車、載貨型自行車、手搖式自行車、及躺式自行車等各種種類的自行車。人力驅動車所具有的車輪數量並未限定。人力驅動車，例如也包括單輪車及具備3輪以上的車輪的車輛。人力驅動車，並不限定僅藉由人力驅動力驅動的車輛。人力驅動車，包含：不僅利用人力驅動力也利用電動馬達的驅動力來推進的電動自行車(E-bike)。電動自行車，包括藉由電動馬達輔助推進的電動輔助自行車。以下在實施方式是將人力驅動車說明為自行車。Referring to FIGS. 1 to 10 , a crank assembly 10 for a human-powered vehicle and a crank arm 30 for a human-powered vehicle according to a first embodiment will be described. A human-driven vehicle has at least one wheel, and is a vehicle that can be driven at least by human power. Human-powered vehicles include, for example, various types of bicycles such as mountain bikes, road bikes, city bikes, cargo bikes, hand-cranked bicycles, and recumbent bicycles. The number of wheels that the human-powered vehicle has is not limited. Human-powered vehicles include, for example, unicycles and vehicles with three or more wheels. A human-powered vehicle is not limited to a vehicle driven only by human power. Human-powered vehicles include: electric bicycles (E-bikes) that are propelled not only by human power but also by electric motor power. Electric bicycles, including electrically assisted bicycles that are propelled assisted by electric motors. In the following embodiments, the human-driven vehicle is described as a bicycle.

如圖1所示，人力驅動車用曲柄組件10具備有：人力驅動車用曲柄臂30、與曲柄軸12。曲柄軸12，在曲柄組件10的組裝狀態安裝於曲柄臂30。曲柄臂30包含第1曲柄臂30A及第2曲柄臂30B。第1曲柄臂30A安裝於曲柄軸12的第1端部12A。第2曲柄臂30B安裝於曲柄軸12的第2端部12B。在第1曲柄臂30A及第2曲柄臂30B分別安裝有踏板16。As shown in FIG. 1 , the crank assembly 10 for a human-powered vehicle includes a crank arm 30 for a human-powered vehicle and a crank shaft 12 . The crankshaft 12 is attached to the crank arm 30 in the assembled state of the crank assembly 10 . The crank arm 30 includes a first crank arm 30A and a second crank arm 30B. The first crank arm 30A is attached to the first end portion 12A of the crankshaft 12 . The second crank arm 30B is attached to the second end portion 12B of the crankshaft 12 . Pedals 16 are attached to the first crank arm 30A and the second crank arm 30B, respectively.

曲柄軸12經由底部支架18安裝於人力驅動車的框架20。曲柄軸12***於筒狀的底部支架18。例如底部支架18具有軸承。底部支架18可旋轉地支承曲柄軸12。人力驅動車具備有鏈輪22，鏈輪22用來傳遞曲柄軸12的旋轉力。鏈輪22可以是一個也可以是複數個。鏈輪22可與曲柄軸12一體旋轉且安裝於曲柄臂30或曲柄軸12。鏈輪22也可相對於曲柄軸12旋轉。例如，在人力驅動車具備有用來輔助人力驅動車推進的馬達的情況，鏈輪22安裝於合力部，在該合力部匯集了曲柄軸12的旋轉力與馬達的旋轉力。鏈輪22可將曲柄軸12的旋轉力經由鏈條傳遞到車輪。The crankshaft 12 is attached to a frame 20 of the human-powered vehicle via a bottom bracket 18 . The crankshaft 12 is inserted into a cylindrical bottom bracket 18 . For example the bottom bracket 18 has bearings. The bottom bracket 18 rotatably supports the crankshaft 12 . The human-powered vehicle is provided with a sprocket 22 for transmitting the rotational force of the crankshaft 12 . The sprocket 22 may be one or plural. The sprocket 22 is rotatable integrally with the crankshaft 12 and is attached to the crank arm 30 or the crankshaft 12 . Sprocket 22 is also rotatable relative to crankshaft 12 . For example, if the human-powered vehicle is provided with a motor for assisting the propulsion of the human-powered vehicle, the sprocket 22 is mounted on a resultant force portion where the rotational force of the crankshaft 12 and the rotational force of the motor are collected. The sprocket 22 can transmit the rotational force of the crankshaft 12 to the wheels via the chain.

如圖1至圖3所示，曲柄臂30具備有：曲柄軸安裝部32、踏板軸安裝部34、主體36。曲柄軸安裝部32與踏板軸安裝部34，具有讓曲柄軸12通過的第1開口38。踏板軸安裝部34具有讓踏板軸14通過的第2開口40。主體36在長邊方向LD配置於曲柄軸安裝部32及踏板軸安裝部34之間。長邊方向LD實質與將曲柄軸安裝部32及踏板軸安裝部34連結的線一致。As shown in FIGS. 1 to 3 , the crank arm 30 includes a crank shaft mounting portion 32 , a pedal shaft mounting portion 34 , and a main body 36 . The crank shaft mounting portion 32 and the pedal shaft mounting portion 34 have a first opening 38 through which the crank shaft 12 passes. The pedal shaft mounting portion 34 has a second opening 40 through which the pedal shaft 14 passes. The main body 36 is disposed between the crank shaft mounting portion 32 and the pedal shaft mounting portion 34 in the longitudinal direction LD. The longitudinal direction LD substantially coincides with a line connecting the crank shaft mounting portion 32 and the pedal shaft mounting portion 34 .

在本實施方式，第1曲柄臂30A及第2曲柄臂30B分別具備有：曲柄軸安裝部32、踏板軸安裝部34、及主體36。第1曲柄臂30A及第2曲柄臂30B的各曲柄軸安裝部32，也可具有相同形狀，也可具有不同形狀。第1曲柄臂30A及第2曲柄臂30B的各踏板軸安裝部34，也可具有相同形狀，也可具有不同形狀。第1曲柄臂30A及第2曲柄臂30B的各主體36，也可具有相同形狀，也可具有不同形狀。In the present embodiment, each of the first crank arm 30A and the second crank arm 30B includes a crank shaft mounting portion 32 , a pedal shaft mounting portion 34 , and a main body 36 . The respective crankshaft mounting portions 32 of the first crank arm 30A and the second crank arm 30B may have the same shape or different shapes. The respective pedal shaft mounting portions 34 of the first crank arm 30A and the second crank arm 30B may have the same shape or different shapes. The main bodies 36 of the first crank arm 30A and the second crank arm 30B may have the same shape or different shapes.

主體36具備有第1壁部42與第2壁部44。第1壁部42，在曲柄臂30安裝於人力驅動車的狀態，朝向人力驅動車的中心面D。中心面D，通過人力驅動車的橫向的中心，且朝框架20的延伸方向延伸。第2壁部44，在曲柄臂30安裝於人力驅動車的狀態，朝向框架20的相反側。主體36進一步具備有第3壁部36A與第4壁部36B。第3壁部36A，在與主體36的長邊方向LD正交的橫邊方向TD的其中一方的端部，將第1壁部42與第2壁部44連接。第4壁部36B，在橫邊方向TD的另一方的端部，將第1壁部42與第2壁部44連接。The main body 36 includes a first wall portion 42 and a second wall portion 44 . The first wall portion 42 faces the center plane D of the human-powered vehicle when the crank arm 30 is attached to the human-powered vehicle. The central plane D passes through the lateral center of the human-driven vehicle and extends in the direction in which the frame 20 extends. The second wall portion 44 faces the opposite side of the frame 20 when the crank arm 30 is attached to the human-powered vehicle. The main body 36 further includes a third wall portion 36A and a fourth wall portion 36B. The third wall portion 36A connects the first wall portion 42 and the second wall portion 44 at one end portion in the lateral direction TD perpendicular to the longitudinal direction LD of the main body 36 . The fourth wall portion 36B connects the first wall portion 42 and the second wall portion 44 at the other end portion in the lateral direction TD.

例如，曲柄軸安裝部32及踏板軸安裝部34分別是與主體36為不同構件。例如主體36的材料包含非金屬材料。例如主體36的材料包含纖維強化塑膠。纖維強化塑膠例如是碳纖維強化塑膠。For example, the crank shaft mounting portion 32 and the pedal shaft mounting portion 34 are separate members from the main body 36 . For example, the material of body 36 includes a non-metallic material. For example, the material of the body 36 includes fiber reinforced plastic. Fiber-reinforced plastics are, for example, carbon fiber-reinforced plastics.

例如曲柄軸安裝部32的材料及踏板軸安裝部34的材料分別包含金屬材料。例如曲柄軸安裝部32的材料及踏板軸安裝部34的材料分別包含鋁。例如曲柄軸安裝部32、踏板軸安裝部34、及主體36是以模塑成形。For example, the material of the crank shaft mounting portion 32 and the material of the pedal shaft mounting portion 34 each include a metal material. For example, the material of the crankshaft mounting portion 32 and the material of the pedal shaft mounting portion 34 each include aluminum. For example, the crank shaft mounting portion 32, the pedal shaft mounting portion 34, and the main body 36 are molded.

例如曲柄軸12包含曲柄臂安裝部24。例如曲柄臂安裝部24藉由壓入方式***於曲柄軸安裝部32的第1開口38。曲柄臂安裝部24包含第1曲柄臂安裝部24A及第2曲柄臂安裝部24B。第1曲柄臂安裝部24A設置於第1端部12A。第2曲柄臂安裝部24B設置於第2端部12B。在本實施方式，第1曲柄臂安裝部24A藉由壓入方式***於第1曲柄臂30A的第1開口38。在本實施方式，第2曲柄臂安裝部24B藉由壓入方式***於第2曲柄臂30B的第1開口38。第2曲柄臂30B藉由螺栓等安裝於曲柄軸12。曲柄臂安裝部24及第1開口38的其中一方在周方向具有複數的凸部，且曲柄臂安裝部24及第1開口38的另一方在周方向具有複數的凹部也可以。For example, the crankshaft 12 includes a crank arm mounting portion 24 . For example, the crank arm mounting portion 24 is inserted into the first opening 38 of the crank shaft mounting portion 32 by press fitting. The crank arm mounting portion 24 includes a first crank arm mounting portion 24A and a second crank arm mounting portion 24B. The first crank arm mounting portion 24A is provided on the first end portion 12A. The second crank arm mounting portion 24B is provided on the second end portion 12B. In the present embodiment, the first crank arm mounting portion 24A is inserted into the first opening 38 of the first crank arm 30A by press-fitting. In this embodiment, the second crank arm mounting portion 24B is inserted into the first opening 38 of the second crank arm 30B by press-fitting. The second crank arm 30B is attached to the crankshaft 12 with bolts or the like. One of the crank arm mounting portion 24 and the first opening 38 may have a plurality of convex portions in the circumferential direction, and the other of the crank arm mounting portion 24 and the first opening 38 may have a plurality of concave portions in the circumferential direction.

如圖1及圖4所示，在沿著曲柄軸12的軸方向的第1方向D1，鏈輪22設置於第1曲柄臂30A與底部支架18之間。例如曲柄臂30進一步具備有鏈輪安裝部48，鏈輪安裝部48包含複數的花鍵齒46。第1曲柄臂30A及第2曲柄臂30B的其中一方進一步具備有鏈輪安裝部48。在本實施方式，第1曲柄臂30A進一步具備有鏈輪安裝部48。在本實施方式，第2曲柄臂30B不具備鏈輪安裝部48。As shown in FIGS. 1 and 4 , the sprocket 22 is provided between the first crank arm 30A and the bottom bracket 18 in the first direction D1 along the axial direction of the crankshaft 12 . For example, the crank arm 30 further includes a sprocket mounting portion 48 including a plurality of spline teeth 46 . One of the first crank arm 30A and the second crank arm 30B further includes a sprocket attachment portion 48 . In the present embodiment, the first crank arm 30A further includes a sprocket attachment portion 48 . In the present embodiment, the second crank arm 30B does not include the sprocket attachment portion 48 .

例如鏈輪安裝部48、曲柄軸安裝部32、踏板軸安裝部34、及主體36形成為不同個體。例如第1曲柄臂30A進一步包含第1安裝部50，第1安裝部50可安裝鏈輪安裝部48。鏈輪安裝部48經由第1安裝部50安裝於主體36。圖2、圖3、圖5至圖10，雖然圖示第2曲柄臂30B，而第1曲柄臂30A的鏈輪安裝部48及第1安裝部50之外的部分都與第2曲柄臂30B相同構造。For example, the sprocket mounting portion 48 , the crank shaft mounting portion 32 , the pedal shaft mounting portion 34 , and the main body 36 are formed as separate entities. For example, the first crank arm 30A further includes a first mounting portion 50 to which the sprocket mounting portion 48 can be mounted. The sprocket attachment portion 48 is attached to the main body 36 via the first attachment portion 50 . 2, FIG. 3, FIG. 5 to FIG. 10, although the second crank arm 30B is shown in the figure, the parts other than the sprocket mounting portion 48 and the first mounting portion 50 of the first crank arm 30A are all connected to the second crank arm 30B. same structure.

例如，第1安裝部50，在第2曲柄臂30B的第1壁部42的外面部42A，形成在與第1開口38對應的部分。在第1安裝部50的外周面形成有公螺紋50A。鏈輪安裝部48包含可安裝於第1安裝部50的螺母48A。在螺母48A形成有可與第1安裝部50的公螺紋50A卡合的母螺紋48B。For example, the first mounting portion 50 is formed at a portion corresponding to the first opening 38 on the outer surface portion 42A of the first wall portion 42 of the second crank arm 30B. A male thread 50A is formed on the outer peripheral surface of the first mounting portion 50 . The sprocket attachment portion 48 includes a nut 48A attachable to the first attachment portion 50 . A female screw 48B capable of engaging with the male screw 50A of the first mounting portion 50 is formed on the nut 48A.

例如鏈輪安裝部48進一步包含：配置在螺母48A與第1安裝部50之間的墊圈48C、及配置在螺母48A與底部支架18之間的彈性構件48D。墊圈48C，例如是在第1方向D1，將螺母48A朝底部支架18位置的方向按壓的波形墊圈。彈性構件48D，例如是用來提高防水性及防塵性的O形環。也可從鏈輪安裝部48省略彈性構件48D。鏈輪安裝部48及第1安裝部50也可形成為一體。For example, the sprocket mounting portion 48 further includes a washer 48C disposed between the nut 48A and the first mounting portion 50 , and an elastic member 48D disposed between the nut 48A and the bottom bracket 18 . The washer 48C is, for example, a wave washer that presses the nut 48A toward the position of the bottom bracket 18 in the first direction D1. The elastic member 48D is, for example, an O-ring for improving waterproofness and dustproofness. The elastic member 48D may also be omitted from the sprocket mounting portion 48 . The sprocket mounting portion 48 and the first mounting portion 50 may also be integrally formed.

如圖5至圖9所示，第1開口38具有第1中心軸心CA1。曲柄軸安裝部32，具有：通過第1中心軸心CA1且沿著橫邊方向TD測定的第1外周長度FL。第1外周長度FL，是對應於與橫邊方向TD平行的方向的曲柄軸安裝部32的外周長度。在本實施方式，第1外周長度FL包含：第1長度FL1、第2長度FL2、第3長度FL3、及第4長度FL4。第1長度FL1及第3長度FL3，是主體36的外周面之中朝橫邊方向TD延伸的部分的長度。第2長度FL2及第4長度FL4，是主體36的外周面之中朝第1方向D1延伸的部分的長度。在本實施方式，第1外周長度FL是藉由：第1長度FL1、第2長度FL2、第3長度FL3、及第4長度FL4的總和所表示。第1外周長度FL，例如是將繩子或捲尺等，通過第1中心軸心CA1且沿著橫邊方向TD捲繞於曲柄軸安裝部32所測定的。As shown in FIGS. 5 to 9 , the first opening 38 has a first central axis CA1. The crankshaft mounting portion 32 has a first outer peripheral length FL that passes through the first central axis CA1 and is measured along the transverse direction TD. The first outer peripheral length FL is the outer peripheral length of the crankshaft mounting portion 32 corresponding to the direction parallel to the lateral direction TD. In the present embodiment, the first outer peripheral length FL includes the first length FL1, the second length FL2, the third length FL3, and the fourth length FL4. The first length FL1 and the third length FL3 are the lengths of the portion extending in the lateral direction TD of the outer peripheral surface of the main body 36 . The second length FL2 and the fourth length FL4 are the lengths of the portion extending in the first direction D1 of the outer peripheral surface of the main body 36 . In the present embodiment, the first outer peripheral length FL is represented by the sum of the first length FL1, the second length FL2, the third length FL3, and the fourth length FL4. The first outer peripheral length FL is measured, for example, by winding a rope or a tape measure or the like around the crankshaft mounting portion 32 along the lateral direction TD while passing through the first central axis CA1.

第2開口40具有第2中心軸心CA2。主體36具有最大部52，最大部52具有沿著橫邊方向TD測定的最大外周長度ML。曲柄臂30，具有：長邊方向參考線LR、及與長邊方向參考線LR垂直的橫邊方向中心線TC。長邊方向參考線LR朝曲柄臂30的長邊方向LD延伸。橫邊方向中心線TC朝曲柄臂30的橫邊方向TD延伸。長邊方向參考線LR通過第1中心軸心CA1及第2中心軸心CA2。橫邊方向中心線TC，通過第1中心軸心CA1與第2中心軸心CA2之間的中心點P。最大外周長度ML成為曲柄臂30的最大外周長度MLC。The second opening 40 has a second central axis CA2. The main body 36 has a maximum portion 52 having a maximum peripheral length ML measured along the transverse direction TD. The crank arm 30 has a longitudinal reference line LR and a transverse centerline TC perpendicular to the longitudinal reference line LR. The longitudinal direction reference line LR extends in the longitudinal direction LD of the crank arm 30 . The transverse centerline TC extends in the transverse direction TD of the crank arm 30 . The longitudinal direction reference line LR passes through the first center axis CA1 and the second center axis CA2. The centerline TC in the transverse direction passes through the center point P between the first center axis CA1 and the second center axis CA2. The maximum outer peripheral length ML is the maximum outer peripheral length MLC of the crank arm 30 .

最大外周長度ML，是對應於與橫邊方向TD平行的方向的主體36的外周長度。在本實施方式，最大外周長度ML包含：第1最大外周長度ML1、第2最大外周長度ML2、第3最大外周長度ML3、及第4最大外周長度ML4。第1最大外周長度ML1及第3最大外周長度ML3，是主體36的外周面之中朝橫邊方向TD延伸的部分的長度。第2最大外周長度ML2及第4最大外周長度ML4，是主體36的外周面之中朝第1方向D1延伸的部分的長度。在本實施方式，最大外周長度ML是藉由：第1最大外周長度ML1、第2最大外周長度ML2、第3最大外周長度ML3、及第4最大外周長度ML4的總和所表示。最大外周長度ML，例如是將繩子或捲尺等，沿著橫邊方向TD捲繞於主體36的最大部52所測定的。The maximum peripheral length ML is the peripheral length of the main body 36 corresponding to the direction parallel to the lateral direction TD. In the present embodiment, the maximum outer peripheral length ML includes a first maximum outer peripheral length ML1, a second maximum outer peripheral length ML2, a third maximum outer peripheral length ML3, and a fourth maximum outer peripheral length ML4. The first maximum outer peripheral length ML1 and the third maximum outer peripheral length ML3 are the lengths of the portion extending in the lateral direction TD of the outer peripheral surface of the main body 36 . The second maximum outer peripheral length ML2 and the fourth maximum outer peripheral length ML4 are the lengths of the portion extending in the first direction D1 of the outer peripheral surface of the main body 36 . In this embodiment, the maximum peripheral length ML is expressed by the sum of the first maximum peripheral length ML1, the second maximum peripheral length ML2, the third maximum peripheral length ML3, and the fourth maximum peripheral length ML4. The maximum outer peripheral length ML is measured, for example, by winding a string or a measuring tape around the largest portion 52 of the main body 36 along the lateral direction TD.

最大外周長度ML相對於第1外周長度FL的長度比R1為1.05以上。例如長度比R1為1.2以上。長度比R1為1.3以上較佳。例如長度比R1為3.0以下。長度比R1為2.0以下較佳。例如長度比R1為1.2以上3.0以下。在本實施方式，長度比R1為1.36。The length ratio R1 of the maximum outer peripheral length ML to the first outer peripheral length FL is 1.05 or more. For example, the length ratio R1 is 1.2 or more. The length ratio R1 is preferably 1.3 or more. For example, the length ratio R1 is 3.0 or less. The length ratio R1 is preferably 2.0 or less. For example, the length ratio R1 is not less than 1.2 and not more than 3.0. In the present embodiment, the length ratio R1 is 1.36.

主體36具有與長邊方向參考線LR重疊的中空部54。主體36的最大部52至少局部包圍中空部54。例如中空部54，在與長邊方向LD正交的方向，藉由第1壁部42、第2壁部44、第3壁部36A、及第4壁部36B形成為四角形。例如最大部52的中空部54，在與長邊方向LD正交的方向，形成為以第1壁部42作為底邊的梯形。中空部54的形狀不限定於本實施方式。The main body 36 has a hollow portion 54 overlapping the longitudinal reference line LR. The largest portion 52 of the body 36 at least partially surrounds the hollow portion 54 . For example, the hollow portion 54 is formed in a quadrangular shape by the first wall portion 42 , the second wall portion 44 , the third wall portion 36A, and the fourth wall portion 36B in a direction perpendicular to the longitudinal direction LD. For example, the hollow portion 54 of the largest portion 52 is formed in a trapezoid with the first wall portion 42 as the base in the direction perpendicular to the longitudinal direction LD. The shape of the hollow portion 54 is not limited to this embodiment.

第1長邊方向距離LD1，是定義為在長邊方向LD從第1中心軸心CA1起至第2中心軸心CA2的距離。第2長邊方向距離LD2，是定義為在長邊方向LD從第2中心軸心CA1起至長邊方向參考線LR上的最大部52的距離。在本實施方式，最大部52，設置在：較曲柄軸安裝部32更接近主體36之中的橫邊方向中心線TC的位置。例如最大部52，設置在較主體36之中的橫邊方向中心線TC與曲柄軸安裝部32的中央更接近橫邊方向中心線TC的位置。The first longitudinal distance LD1 is defined as the distance from the first central axis CA1 to the second central axis CA2 in the longitudinal direction LD. The second longitudinal distance LD2 is defined as the distance from the second central axis CA1 to the maximum portion 52 on the longitudinal reference line LR in the longitudinal direction LD. In the present embodiment, the largest portion 52 is provided at a position closer to the centerline TC in the transverse direction of the main body 36 than the crankshaft mounting portion 32 . For example, the largest portion 52 is provided at a position closer to the center line TC in the transverse direction than the center of the center line TC in the transverse direction of the main body 36 and the crankshaft mounting portion 32 .

第2長邊方向距離LD2相對於第1長邊方向距離LD1的距離比R2為0.3以上。例如距離比R2為0.5以下。例如距離比R2為0.3以上0.5以下。例如距離比R2為0.35以上0.45以下。在本實施方式，距離比R2為0.38。The distance ratio R2 of the second longitudinal distance LD2 to the first longitudinal distance LD1 is 0.3 or more. For example, the distance ratio R2 is 0.5 or less. For example, the distance ratio R2 is not less than 0.3 and not more than 0.5. For example, the distance ratio R2 is not less than 0.35 and not more than 0.45. In the present embodiment, the distance ratio R2 is 0.38.

根據強度分析，證實長度比R1為1.05以上且距離比R2為0.3以上的曲柄臂30的強度和剛性優異。因此本發明的曲柄臂30能藉由薄片化等方式輕量化。According to the strength analysis, it was confirmed that the crank arm 30 having the length ratio R1 of 1.05 or more and the distance ratio R2 of 0.3 or more has excellent strength and rigidity. Therefore, the crank arm 30 of the present invention can be reduced in weight by means of thinning and the like.

如圖10所示，曲柄臂30進一步具備有：配置於中空部54的力量感應器56。力量感應器56例如設置於主體36的第2壁部44的內面部44A。力量感應器56包含應變計。As shown in FIG. 10 , the crank arm 30 further includes a force sensor 56 arranged in the hollow portion 54 . The force sensor 56 is provided, for example, on the inner surface 44A of the second wall 44 of the main body 36 . Force sensor 56 includes strain gauges.

＜第2實施方式＞參考圖11至圖13，針對第2實施方式的曲柄組件10及曲柄臂30加以說明。第2實施方式的曲柄組件10及曲柄臂30，除了包含圖11至圖13的曲柄臂30來取代圖3、圖5及圖6的曲柄臂30之外，其他與第1實施方式的曲柄組件10及曲柄臂30相同。在第1實施方式的曲柄組件10及曲柄臂30之中，針對與第1實施方式共通的構造加上與第1實施方式相同的符號，省略重複的說明。 <Second Embodiment> Referring to FIGS. 11 to 13 , the crank unit 10 and the crank arm 30 of the second embodiment will be described. The crank assembly 10 and the crank arm 30 of the second embodiment are the same as the crank assembly of the first embodiment except that the crank arm 30 of FIGS. 11 to 13 is included instead of the crank arm 30 of FIGS. 10 and the crank arm 30 are the same. In the crank assembly 10 and the crank arm 30 of the first embodiment, the same reference numerals as those of the first embodiment are assigned to the same structures as those of the first embodiment, and redundant descriptions are omitted.

如圖11所示，主體36具有與中空部54連通的開口58。例如，在曲柄臂30安裝於人力驅動車的狀態，開口58朝向人力驅動車的中心面D。由於主體36具有與中空部54連通的開口58，所以能將力量感應器56配置於中空部54內。也可取代力量感應器56或除了力量感應器56之外，在中空部54配置：電池、馬達、及力量感應器56以外的感應器等的電子零件。也可在開口58***用來與配置於中空部54的電子零件連接的電線。As shown in FIG. 11 , the main body 36 has an opening 58 communicating with the hollow portion 54 . For example, when the crank arm 30 is mounted on the human-powered vehicle, the opening 58 faces the center plane D of the human-powered vehicle. Since the main body 36 has an opening 58 communicating with the hollow portion 54 , the force sensor 56 can be disposed in the hollow portion 54 . Instead of the force sensor 56 or in addition to the force sensor 56 , electronic components such as batteries, motors, and sensors other than the force sensor 56 may be arranged in the hollow portion 54 . Electric wires for connecting to electronic components arranged in the hollow portion 54 may also be inserted into the opening 58 .

如圖12及圖13所示，也可在主體36設置至少一個孔部60。至少一個孔部60，也可設置在：第1壁部42、第2壁部44、及將第1壁部42與第2壁部44連接的側壁部的其中之一。藉由在曲柄臂30設置至少一個孔部60，可進一步將曲柄臂30輕量化。As shown in FIGS. 12 and 13 , at least one hole 60 may be provided in the main body 36 . At least one hole 60 may be provided in one of the first wall 42 , the second wall 44 , and the side wall connecting the first wall 42 and the second wall 44 . By providing at least one hole 60 in the crank arm 30, the crank arm 30 can be further reduced in weight.

＜變形例＞關於各實施方式的說明，是本發明的人力驅動車用曲柄組件及人力驅動車用曲柄臂採取的型態的例子，並非意圖限制其形態。本發明的人力驅動車用曲柄組件及人力驅動車用曲柄臂，可採取例如以下所示的各實施方式的變形例及未相互矛盾的至少兩個變形例組合的型態。在以下的變形例，針對與實施方式共通的部分，加上與實施方式相同的符號，省略其說明。＜Modifications＞ The descriptions of the respective embodiments are examples of the forms taken by the crank assembly for human-powered vehicles and the crank arm for human-powered vehicles of the present invention, and are not intended to limit the forms. The crank assembly for a human-powered vehicle and the crank arm for a human-powered vehicle of the present invention can take, for example, modifications of the respective embodiments shown below and combinations of at least two modifications that do not contradict each other. In the following modified examples, the same symbols as those in the embodiment are attached to the parts common to the embodiment, and description thereof is omitted.

曲柄軸安裝部32、踏板軸安裝部34、及主體36，也可一體成形為單一元件。在該情況，曲柄軸安裝部32的材料、踏板軸安裝部34的材料、及主體36的材料分別包含金屬材料。例如曲柄軸安裝部32的材料、踏板軸安裝部34的材料、及主體36的材料分別包含鋁或鎂。The crank shaft mounting portion 32, the pedal shaft mounting portion 34, and the main body 36 may also be integrally formed as a single component. In this case, the material of the crank shaft mounting portion 32 , the material of the pedal shaft mounting portion 34 , and the material of the main body 36 each include a metal material. For example, the material of the crankshaft mounting part 32, the material of the pedal shaft mounting part 34, and the material of the main body 36 contain aluminum or magnesium, respectively.

曲柄軸12也可包含曲柄臂安裝部，上述曲柄臂安裝部，***於曲柄軸安裝部32的第1開口38且藉由黏接劑安裝於曲柄軸安裝部32的第1開口38。The crankshaft 12 may also include a crank arm mounting portion inserted into the first opening 38 of the crankshaft mounting portion 32 and mounted to the first opening 38 of the crankshaft mounting portion 32 with an adhesive.

第1曲柄臂30A的長度比R1也可與第2曲柄臂30B的長度比R1不同。第1曲柄臂30A的距離比R2也可與第2曲柄臂30B的距離比R2不同。The length ratio R1 of the first crank arm 30A may be different from the length ratio R1 of the second crank arm 30B. The distance ratio R2 of the first crank arm 30A may be different from the distance ratio R2 of the second crank arm 30B.

也可只有第1曲柄臂30A及第2曲柄臂30B的其中一方具有1.05以上的長度比R1及0.3以上的距離比R2。Only one of the first crank arm 30A and the second crank arm 30B may have a length ratio R1 of 1.05 or more and a distance ratio R2 of 0.3 or more.

本說明書所使用的「至少一個」的表現方式，代表所需要的選項的「一個以上」。作為一個例子，在本說明書所使用的「至少一個」的表現方式，如果選項的數量為兩個的話，則代表「只有一個選項」或「兩個選項雙方」。作為其他例子，在本說明書所使用的「至少一個」的表現方式，如果選項的數量為三個以上的話，則代表「只有一個選項」或「兩個以上的任意選項的組合」。The expression "at least one" used in this manual means "more than one" of the required options. As an example, the expression "at least one" used in this specification means "only one option" or "both options" if the number of options is two. As another example, the expression "at least one" used in this specification means "only one option" or "a combination of two or more arbitrary options" if the number of options is three or more.

10:曲柄組件 12:曲柄軸 14:踏板軸 24:曲柄臂安裝部 30:曲柄臂 32:曲柄軸安裝部 34:踏板軸安裝部 36:主體 38:第1開口 40:第2開口 46:複數的花鍵齒 48:鏈輪安裝部 52:最大部 54:中空部 56:力量感應器 58:開口 10: crank assembly 12: Crankshaft 14: Pedal shaft 24: Crank arm mounting part 30: crank arm 32: Crankshaft mounting part 34: Pedal shaft installation part 36: subject 38: 1st opening 40: the second opening 46: Plural spline teeth 48:Sprocket installation part 52: the largest part 54: hollow part 56: Force sensor 58: opening

[圖1]是人力驅動車的曲柄及其周邊的俯視圖，曲柄包含第1實施方式的人力驅動車用曲柄組件，曲柄組件具備人力驅動車用曲柄臂。 [圖2]為圖1的人力驅動車用曲柄臂的正視圖。 [圖3]為圖1的人力驅動車用曲柄臂的後視圖。 [圖4]為圖1的主體的局部及鏈輪安裝部的分解立體圖。 [圖5]為圖1的人力驅動車用曲柄臂的第1側視圖。 [圖6]為圖1的人力驅動車用曲柄臂的第2側視圖。 [圖7]為圖1的人力驅動車用曲柄臂的立體圖。 [圖8]為沿著圖3的D8-D8線的剖面圖。 [圖9]為沿著圖3的D9-D9線的剖面圖。 [圖10]為沿著圖3的D10-D10線的剖面圖。 [圖11]為第2實施方式的人力驅動車用曲柄臂的後視圖。 [圖12]為圖11的人力驅動車用曲柄臂的第1側視圖。 [圖13]為圖11的人力驅動車用曲柄臂的第2側視圖。 1 is a top view of a crank of a human-powered vehicle and its surroundings. The crank includes a crank unit for a human-powered vehicle according to a first embodiment, and the crank unit includes a crank arm for a human-powered vehicle. [ Fig. 2 ] It is a front view of the crank arm for the human-powered vehicle of Fig. 1 . [ Fig. 3 ] is a rear view of the crank arm for a human-powered vehicle of Fig. 1 . [FIG. 4] It is an exploded perspective view of a part of the main body and the sprocket mounting part of FIG. 1. [FIG. [ Fig. 5 ] It is a first side view of the crank arm for a human-powered vehicle in Fig. 1 . [FIG. 6] It is the 2nd side view of the crank arm for a human-driven vehicle of FIG. 1. [FIG. [ Fig. 7 ] is a perspective view of the crank arm for a human-powered vehicle in Fig. 1 . [ Fig. 8 ] It is a sectional view taken along line D8-D8 in Fig. 3 . [ Fig. 9 ] is a cross-sectional view taken along line D9-D9 in Fig. 3 . [ Fig. 10 ] is a sectional view taken along line D10-D10 in Fig. 3 . [ Fig. 11 ] is a rear view of a crank arm for a human-powered vehicle according to a second embodiment. [FIG. 12] It is the 1st side view of the crank arm for human-powered vehicles of FIG. 11. [FIG. [FIG. 13] It is the 2nd side view of the crank arm for human-driven vehicles of FIG. 11. [FIG.

32:曲柄軸安裝部 32: Crankshaft mounting part

34:踏板軸安裝部 34: Pedal shaft installation part

36:主體 36: subject

36B:第4壁部 36B: 4th wall

38:第1開口 38: 1st opening

40:第2開口 40: the second opening

42:第1壁部 42: 1st wall part

52:最大部 52: the largest part

CA1:第1中心軸心 CA1: 1st central axis

CA2:第2中心軸心 CA2: Second central axis

D1:第1方向 D1: 1st direction

LR:長邊方向參考線 LR: Long side direction reference line

LD:長邊方向 LD: Long side direction

FL:第1外周長度 FL: 1st outer circumference length

ML:最大外周長度 ML: maximum peripheral length

MLC:最大外周長度 MLC: maximum peripheral length

P:中心點 P: center point

TC:橫邊方向中心線 TC: Centerline in transverse direction

TD:橫邊方向 TD: Transverse direction

Claims

一種人力驅動車用曲柄臂，上述曲柄臂，具有：長邊方向參考線及與上述長邊方向參考線垂直的橫邊方向中心線；上述長邊方向參考線朝上述曲柄臂的長邊方向延伸，上述橫邊方向中心線朝上述曲柄臂的橫邊方向延伸；上述曲柄臂具備有：具有讓曲柄軸通過的第1開口的曲柄軸安裝部、具有讓踏板軸通過的第2開口的踏板軸安裝部、及在上述長邊方向配置在上述曲柄軸安裝部及上述踏板軸安裝部之間的主體；上述第1開口具有第1中心軸心；上述曲柄軸安裝部具有：通過上述第1中心軸心且沿著上述橫邊方向測定的第1外周長度；上述第2開口具有第2中心軸心；上述主體具有最大部，上述最大部具有沿著上述橫邊方向測定的最大外周長度；上述長邊方向參考線通過上述第1中心軸心及上述第2中心軸心，上述橫邊方向中心線，通過上述第1中心軸心與上述第2中心軸心之間的中心點，上述最大外周長度為上述曲柄臂的最大外周長度，上述主體具有與上述長邊方向參考線重疊的中空部；上述主體的上述最大部至少局部包圍上述中空部；第1長邊方向距離定義為：在上述長邊方向從上述第1中心軸心起至上述第2中心軸心的距離；第2長邊方向距離定義為：在上述長邊方向從上述第1中心軸心起至上述長邊方向參考線上的上述最大部的距離；上述最大外周長度相對於上述第1外周長度的長度比為1.05以上，上述第2長邊方向距離相對於上述第1長邊方向距離的距離比為0.3以上。 A crank arm for a human-driven vehicle, The above-mentioned crank arm has: a reference line in the long-side direction and a centerline in the lateral direction perpendicular to the reference line in the long-side direction; The above-mentioned long-side reference line extends toward the long-side direction of the above-mentioned crank arm, The center line in the lateral direction extends toward the lateral direction of the crank arm; The crank arm includes: a crank shaft mounting portion having a first opening through which the crank shaft passes; a pedal shaft mounting portion having a second opening through which the pedal shaft passes; the main body between the above-mentioned pedal shaft mounting parts; The first opening has a first central axis; The crankshaft mounting portion has a first outer peripheral length that passes through the first central axis and is measured along the lateral direction; The second opening has a second central axis; The main body has a maximum portion, and the maximum portion has a maximum peripheral length measured along the lateral direction; The reference line in the longitudinal direction passes through the first central axis and the second central axis, The centerline in the lateral direction passes through the center point between the first center axis and the second center axis, The above-mentioned maximum peripheral length is the maximum peripheral length of the above-mentioned crank arm, The above-mentioned main body has a hollow portion overlapping with the above-mentioned long-side direction reference line; said largest portion of said body at least partially surrounds said hollow portion; The first long-side distance is defined as: the distance from the above-mentioned first central axis to the above-mentioned second central axis in the above-mentioned long-side direction; The second longitudinal distance is defined as: the distance from the aforementioned first central axis in the aforementioned longitudinal direction to the aforementioned maximum portion on the aforementioned longitudinal reference line; A length ratio of the maximum outer circumference length to the first outer circumference length is 1.05 or more, A distance ratio of the second longitudinal distance to the first longitudinal distance is 0.3 or more.

如請求項1的人力驅動車用曲柄臂，其中，上述距離比為0.5以下。The crank arm for a human-driven vehicle according to claim 1, wherein the distance ratio is 0.5 or less.

如請求項1的人力驅動車用曲柄臂，其中，上述距離比為0.35以上0.45以下。The crank arm for a human-powered vehicle according to claim 1, wherein the distance ratio is 0.35 to 0.45.

如請求項1的人力驅動車用曲柄臂，其中，上述長度比為1.2以上。The crank arm for a human-driven vehicle according to claim 1, wherein the length ratio is 1.2 or more.

如請求項1的人力驅動車用曲柄臂，其中，上述長度比為3.0以下。The crank arm for a human-powered vehicle according to claim 1, wherein the length ratio is 3.0 or less.

如請求項1的人力驅動車用曲柄臂，其中，上述曲柄軸安裝部及上述踏板軸安裝部分別與上述主體為不同構件。The crank arm for a human-powered vehicle according to claim 1, wherein the crank shaft mounting portion and the pedal shaft mounting portion are separate members from the main body.

如請求項6的人力驅動車用曲柄臂，其中，上述主體的材料包含非金屬材料。The crank arm for a human-powered vehicle as claimed in claim 6, wherein the material of the main body includes non-metallic materials.

如請求項7的人力驅動車用曲柄臂，其中，上述主體的材料包含纖維強化塑膠。The crank arm for a human-driven vehicle according to claim 7, wherein the material of the main body includes fiber-reinforced plastic.

如請求項6的人力驅動車用曲柄臂，其中，上述曲柄軸安裝部的材料及上述踏板軸安裝部的材料分別包含金屬材料。The crank arm for a human-powered vehicle according to claim 6, wherein the material of the crankshaft mounting part and the material of the pedal shaft mounting part respectively include metal materials.

如請求項9的人力驅動車用曲柄臂，其中，上述曲柄軸安裝部的材料及上述踏板軸安裝部的材料分別包含鋁。The crank arm for a human-powered vehicle according to Claim 9, wherein the material of the crankshaft mounting part and the material of the pedal shaft mounting part each contain aluminum.

如請求項1的人力驅動車用曲柄臂，其中，上述曲柄軸安裝部、上述踏板軸安裝部、及上述主體為一體成形的單一元件。The crank arm for a human-powered vehicle according to claim 1, wherein the crank shaft mounting portion, the pedal shaft mounting portion, and the main body are integrally formed as a single component.

如請求項11的人力驅動車用曲柄臂，其中，上述曲柄軸安裝部的材料、上述踏板軸安裝部的材料、及上述主體的材料分別包含金屬材料。The crank arm for a human-powered vehicle according to claim 11, wherein the material of the crankshaft mounting part, the material of the pedal shaft mounting part, and the material of the main body each include a metal material.

如請求項12的人力驅動車用曲柄臂，其中，上述曲柄軸安裝部的材料、上述踏板軸安裝部的材料、及上述主體的材料分別包含鋁或鎂。The crank arm for a human-powered vehicle according to claim 12, wherein the material of the crankshaft mounting part, the material of the pedal shaft mounting part, and the material of the main body each contain aluminum or magnesium.

如請求項1的人力驅動車用曲柄臂，其中，上述主體具有與上述中空部連通的開口。The crank arm for a human-powered vehicle according to claim 1, wherein the main body has an opening communicating with the hollow portion.

如請求項14的人力驅動車用曲柄臂，其中，在上述曲柄臂安裝於上述人力驅動車的安裝狀態，上述開口朝向上述人力驅動車的中心面。The crank arm for a human-driven vehicle according to claim 14, wherein, in the installed state of the crank arm on the human-driven vehicle, the opening faces the center plane of the human-driven vehicle.

如請求項1的人力驅動車用曲柄臂，其中，進一步具備有：配置在上述中空部的力量感應器。The crank arm for a human-powered vehicle according to claim 1, further comprising: a force sensor disposed in the hollow portion.

如請求項16的人力驅動車用曲柄臂，其中，上述力量感應器包含應變計。The crank arm for a human-powered vehicle as claimed in claim 16, wherein the force sensor includes a strain gauge.

如請求項1的人力驅動車用曲柄臂，其中，進一步具備有鏈輪安裝部，上述鏈輪安裝部包含複數的花鍵齒。 The crank arm for a human-powered vehicle as claimed in claim 1, wherein it is further equipped with a sprocket mounting part, The sprocket mounting portion includes a plurality of spline teeth.

一種人力驅動車用曲柄組件，具備有：請求項1至18中任一項的上述曲柄臂、及在上述曲柄組件的組裝狀態安裝於上述曲柄臂的上述曲柄軸。 A crank assembly for a human-driven vehicle, comprising: The crank arm of any one of claims 1 to 18, and the crankshaft attached to the crank arm in the assembled state of the crank assembly.

如請求項19的人力驅動車用曲柄組件，其中，上述曲柄軸包含有曲柄臂安裝部，上述曲柄臂安裝部藉由壓入方式***於上述曲柄軸安裝部的上述第1開口。 The crank assembly for a human-driven vehicle as claimed in claim 19, wherein the crank shaft includes a crank arm mounting portion, The crank arm mounting portion is inserted into the first opening of the crank shaft mounting portion by press fitting.

如請求項19的人力驅動車用曲柄組件，其中，上述曲柄軸包含有曲柄臂安裝部，上述曲柄臂安裝部***於上述曲柄軸安裝部的上述第1開口，且藉由黏接劑安裝於上述曲柄軸安裝部的上述第1開口。 The crank assembly for a human-driven vehicle as claimed in claim 19, wherein the crank shaft includes a crank arm mounting portion, The crank arm mounting portion is inserted into the first opening of the crank shaft mounting portion, and is mounted to the first opening of the crank shaft mounting portion with an adhesive.