TWI721832B

TWI721832B - Chain guide of rear derailleur of bicycle

Info

Publication number: TWI721832B
Application number: TW109109725A
Authority: TW
Inventors: 陳柏誠
Original assignee: 傳誠技研有限公司
Priority date: 2020-03-24
Filing date: 2020-03-24
Publication date: 2021-03-11
Also published as: TW202136116A

Abstract

A chain guide of a rear derailleur of a bicycle includes a main member, a first guiding wheel, a second guiding wheel, and an elastic member. The first and second guiding wheels are pivoted on opposite ends of the main member, and the first guiding wheel is movable between a first position and a second position related to the main member by a force of a chain. The elastic member urges the first guiding wheel to move the first guiding wheel from the second position to the first position. The movement of the first guiding wheel makes the chain easier and smoother to shift from a sprocket to another sprocket of a cogset of the bicycle.

Description

自行車後變速器之導鏈器 Chain guide of bicycle rear derailleur

本發明係與自行車有關，特別是關於一種自行車後變速器之導鏈器。 The present invention relates to bicycles, and particularly relates to a chain guide of a bicycle rear derailleur.

使用者於自行車變速過程中，會扳動變速桿帶動一變速器進行變速，一般後變速器具有一上主座與一下主座，分別樞接一車架與一導鏈器，讓一鏈條能夠在一飛輪的不同齒盤間轉換。 In the process of shifting the bicycle, the user pulls the shift lever to drive a transmission to shift. Generally, the rear derailleur has an upper main seat and a lower main seat, which are pivotally connected to a frame and a chain guide, so that a chain can be Conversion between different chainrings of the flywheel.

當該鏈條由小尺寸的齒盤轉換至大尺寸的齒盤的過程中，該鏈條的張力會隨著所嚙合的齒盤的尺寸不同而改變。習知的後變速器，靠著鏈條移動時所產生的位置與角度的變化，使得後變速器與該導鏈器的相對角度發生變化，俾使該鏈條能順利地由一齒排轉換至另一齒盤，即俗稱的上下鏈。 When the chain is converted from a small-sized chainring to a large-sized chainring, the tension of the chain will change with the size of the meshed chainring. The conventional rear derailleur relies on the position and angle changes produced when the chain moves, so that the relative angle between the rear derailleur and the chain guide changes, so that the chain can be smoothly converted from one tooth row to another. Disk, which is commonly known as the upper and lower chain.

然而，習用之作法對於該鏈條轉換時的順暢性的幫助相當有限。當該鏈條上下鏈時的阻力較大時，會影響騎乘的流暢度，甚至造成上下鏈的失敗。 However, the conventional practice is quite limited in helping the smoothness of the chain transition. When the resistance of the chain when going up and down is large, it will affect the smoothness of riding and even cause the failure of the up and down chain.

此外，當該鏈條轉換至大尺寸的齒盤時，由於該導鏈器的一導輪與該大尺寸的齒盤的距離相當接近，此時會造成該鏈條的鏈面產生歪斜。歪斜的鏈面很容易造成上下鏈的失敗。 In addition, when the chain is switched to a large-sized chainring, since the distance between a guide wheel of the chain guide and the large-sized chainring is quite close, the chain surface of the chain will be skewed at this time. The skewed chain surface can easily cause the failure of the upper and lower chains.

本發明的目的在於提供一種自行車後變速器之導鏈器，其可提高該鏈條在上下鏈時的順暢度。 The object of the present invention is to provide a chain guide for a bicycle rear derailleur, which can improve the smoothness of the chain when it is going up and down.

為達成前述之發明目的，本發明提供一種自行車後變速器之導鏈器，包含有：一主體，具有一第一端以及一第二端；一第一導輪，樞設於該主體的第一端，可自由轉動，並可於一第一位置與一第二位置間移動；一第二導輪，樞設於該主體的第二端，可自由轉動；以及一彈性件，設置於該第一導輪與該主體之間，施予該第一導輪一彈力，使該第一導輪有由該第二位置往該第一位置移動之趨勢。 In order to achieve the aforementioned object of the invention, the present invention provides a chain guide for a bicycle rear derailleur, comprising: a main body having a first end and a second end; and a first guide wheel pivoted on the first end of the main body The end can be freely rotated and can be moved between a first position and a second position; a second guide wheel is pivoted on the second end of the main body and can be freely rotated; and an elastic member is arranged on the first position An elastic force is applied to the first guide wheel between a guide wheel and the main body, so that the first guide wheel has a tendency to move from the second position to the first position.

在一實施例中，該主體設有一導槽，該第一導輪具有一導軸伸入該導槽，使該第一導輪沿該導槽移動。 In one embodiment, the main body is provided with a guide groove, and the first guide wheel has a guide shaft extending into the guide groove, so that the first guide wheel moves along the guide groove.

在一實施例中，該主體的第一端處具有一延伸板，其上設有該導槽。 In one embodiment, the first end of the main body has an extension plate on which the guide groove is provided.

在一實施例中，該主體上設有一支柱，該彈性件的二端分別連接於該支柱與該第一導輪之導軸。 In one embodiment, the main body is provided with a pillar, and two ends of the elastic member are respectively connected to the pillar and the guide shaft of the first guide wheel.

在一實施例中，該主體具有一主臂以及一擺臂；該擺臂之一端樞設於該主臂，另一端樞設有該第一導輪。 In one embodiment, the main body has a main arm and a swing arm; one end of the swing arm is pivoted to the main arm, and the other end is pivoted to the first guide wheel.

在一實施例中，該主體具有一主臂以及一擺臂；該擺臂之一端樞設於該主臂；該第一導輪透過一導軸樞設於該擺臂；該主臂設有一導槽，該導軸伸入該導槽。 In one embodiment, the main body has a main arm and a swing arm; one end of the swing arm is pivoted to the main arm; the first guide wheel is pivoted to the swing arm through a guide shaft; the main arm is provided with a The guide groove, the guide shaft extends into the guide groove.

在一實施例中，該主體更具有一支撐臂；該擺臂之一端與該支撐臂之一端透過一銷連接於該主臂；該第二導輪位於該主臂與該支撐臂之間，並透過一輪軸樞設於該主臂與該支撐臂。 In one embodiment, the main body further has a support arm; one end of the swing arm and one end of the support arm are connected to the main arm through a pin; the second guide wheel is located between the main arm and the support arm, It is pivoted on the main arm and the supporting arm through a wheel shaft.

以上述手段可改善習用後變速器在上下鏈時所產生的種種問題。 The above-mentioned methods can improve the various problems that occur when the conventional rear derailleur moves on and off the chain.

10:導鏈器 10: Chain guide

12:主體 12: main body

14:第一導輪 14: The first guide wheel

16:第二導輪 16: second guide wheel

18:主臂 18: main arm

20:擺臂 20: swing arm

22:支撐臂 22: Support arm

24:第一連接部 24: The first connection part

26:第二連接部 26: The second connecting part

28:圓形板片 28: round plate

30:延伸板片 30: Extension plate

32:連接孔 32: connecting hole

34:導槽 34: Guide groove

36:支柱 36: Pillar

38:第二輪孔 38: second round of holes

40:軸孔 40: Shaft hole

42:銷 42: pin

44:第一輪孔 44: first round of holes

46:第二輪孔 46: second round of holes

48:輪軸 48: Axle

50:導軸 50: guide shaft

52:彈性件 52: Elastic part

54:鏈條 54: chain

56:飛輪 56: Flywheel

58,60:齒盤 58,60: chainring

62:主座 62: Main Block

第1圖係本發明一較佳實施例之分解圖。 Figure 1 is an exploded view of a preferred embodiment of the present invention.

第2圖係本發明一較佳實施例之背視圖。 Figure 2 is a back view of a preferred embodiment of the present invention.

第3圖係本發明一較佳實施例之正視圖，顯示該第一導輪位於該第一位置。 Figure 3 is a front view of a preferred embodiment of the present invention, showing that the first guide wheel is in the first position.

第4圖係本發明一較佳實施例之正視圖，顯示該第一導輪位於該第二位置。 Figure 4 is a front view of a preferred embodiment of the present invention, showing that the first guide wheel is in the second position.

第5圖係本發明一較佳實施例之示意圖，顯示鏈條結合於小齒輪時，導鏈器之狀態。 Figure 5 is a schematic diagram of a preferred embodiment of the present invention, showing the state of the chain guide when the chain is coupled to the pinion gear.

第6圖係本發明一較佳實施例之示意圖，顯示鏈條結合於大齒輪時，導鏈器之狀態。 Figure 6 is a schematic diagram of a preferred embodiment of the present invention, showing the state of the chain guide when the chain is coupled to the large gear.

請參閱第1圖至第3圖所示，本發明第一較佳實施例所提供之一自行車後變速器之導鏈器10包含有：一主體12、一第一導輪14，以及一第二導輪16。 Please refer to Figures 1 to 3, the first preferred embodiment of the present invention provides a bicycle rear derailleur chain guide 10 includes: a main body 12, a first guide wheel 14, and a second Guide wheel 16.

該主體12具有一主臂18、一擺臂20以及一支撐臂22。該主臂18具有一第一端與一第二端，在該第一端處具有一第一連接部24；該第二端處具有一第二連接部26。該第一連接部24具有一概呈圓形板片28以及一由該圓形板片28向外延伸之延伸板片30。該圓形板片28上設有一連接孔32，用以與一後變速器之主座62(第5圖)連接。該延伸板片30概呈弧形，設置有一概呈弧形之導槽34。在該圓形板片28上設有一支柱36，對應於該導槽34之一端。該第二連接部26概呈扇形，其上設置有一第二輪孔38。該主臂18的中段位置設有一軸孔40，供一銷42穿過，以結合該擺臂20與該支撐臂22。該擺臂20之一端透過該銷42而樞接於該主臂18，另一端具有一第一輪孔44。該第一輪孔44對應於該導槽34。該支撐臂22之一端同樣透過該銷42而結合於該主臂18，另一端具有一第二輪孔46，對準於該主臂18之第二輪孔38。該第二導輪16設置於該支撐臂22與該主臂18之第二連接部26之間，透過一輪軸48，穿過該第二導輪16以及該支撐臂22與該主臂18之第二連接部26之第二輪孔38,46，而使該第二導輪16樞接於該主體12，使該第二導輪16可自由轉動。 The main body 12 has a main arm 18, a swing arm 20 and a support arm 22. The main arm 18 has a first end and a second end. The first end has a first connecting portion 24 and the second end has a second connecting portion 26. The first connecting portion 24 has a generally circular plate 28 and an extension plate 30 extending outward from the circular plate 28. The circular plate 28 is provided with a connecting hole 32 for connecting with the main seat 62 (Figure 5) of a rear derailleur. The extension plate 30 is generally arc-shaped, and is provided with a generally arc-shaped guide groove 34. A pillar 36 is provided on the circular plate 28 corresponding to one end of the guide groove 34. The second connecting portion 26 is generally fan-shaped, and a second round hole 38 is provided thereon. A shaft hole 40 is provided in the middle section of the main arm 18 for a pin 42 to pass through to connect the swing arm 20 and the support arm 22. One end of the swing arm 20 is pivotally connected through the pin 42 The main arm 18 has a first round hole 44 at the other end. The first wheel hole 44 corresponds to the guide groove 34. One end of the support arm 22 is also coupled to the main arm 18 through the pin 42, and the other end has a second wheel hole 46, which is aligned with the second wheel hole 38 of the main arm 18. The second guide wheel 16 is disposed between the support arm 22 and the second connecting portion 26 of the main arm 18, and passes through a wheel shaft 48, and passes through the second guide wheel 16 and the support arm 22 and the main arm 18 The second wheel holes 38 and 46 of the second connecting portion 26 enable the second guide wheel 16 to be pivotally connected to the main body 12 so that the second guide wheel 16 can rotate freely.

該第一導輪14，透過一導軸50，穿過該擺臂20之第一輪孔32與該第一導輪14，而樞接於該擺臂20。之後，該導軸50伸入該主臂18之導槽34，使該第一導輪14除可自由轉動外，更可在沿該導槽34，在一第一位置(第3圖)與一第二位置(第4圖)間移動。一彈性件52，在本實施例中為一拉伸彈簧，一端連接於該支柱36，另一端連接於該導軸50，使該第一導輪14在初始(未受力)狀態下是位於該第一位置。換言之，該彈性件52施予該第一導輪14一彈力，使該第一導輪14有由該第二位置往該第一位置移動之趨勢。 The first guide wheel 14 passes through a guide shaft 50, passes through the first wheel hole 32 of the swing arm 20 and the first guide wheel 14, and is pivotally connected to the swing arm 20. After that, the guide shaft 50 extends into the guide groove 34 of the main arm 18, so that the first guide wheel 14 can rotate freely, and can also move along the guide groove 34 in a first position (Figure 3) and Move between a second position (Figure 4). An elastic member 52, in this embodiment, is a tension spring, one end is connected to the pillar 36, and the other end is connected to the guide shaft 50, so that the first guide wheel 14 is located in the initial (unstressed) state The first position. In other words, the elastic member 52 exerts an elastic force on the first guide wheel 14 so that the first guide wheel 14 has a tendency to move from the second position to the first position.

請參閱第5圖與第6圖所示，該第一導輪14與該第二導輪16的周圓具有複數個齒，供一鏈條54依序繞過該第二導輪16與該第一導輪14，並與部分的齒嚙合後，再與一飛輪56之複數個齒盤之其中一者嚙合。當該鏈條54與最小尺寸的齒盤58嚙合時(第5圖)，該第一導輪14是位於該第一位置。當該鏈條54轉換至大尺寸的齒盤60時，該第一導輪14會因該鏈條54的張力變化，而由該第一位置往該第二位置的方向移動至一預定位置(第6圖)。 Please refer to Figures 5 and 6, the circumference of the first guide wheel 14 and the second guide wheel 16 has a plurality of teeth, for a chain 54 to sequentially bypass the second guide wheel 16 and the first guide wheel 16 A guide wheel 14 meshes with part of the teeth, and then meshes with one of the plurality of gear discs of a flywheel 56. When the chain 54 is engaged with the smallest-sized chainring 58 (Figure 5), the first guide wheel 14 is located at the first position. When the chain 54 is switched to the large-sized chainring 60, the first guide wheel 14 will move from the first position to the second position to a predetermined position (the sixth position) due to the change in the tension of the chain 54 Figure).

總結以上，本發明提供該可移動的第一導輪14，可根據該鏈條54在不同齒盤間轉換時所發生的張力變化而移動。如此可使該鏈條54轉換至不同齒盤時，即所謂的上下鏈，具有較小的干涉與摩擦，使上下鏈的過程更為穩定。 In summary, the present invention provides the movable first guide wheel 14 which can move according to the tension change of the chain 54 when switching between different chainrings. In this way, when the chain 54 is switched to different chainrings, the so-called upper and lower chains, there is less interference and friction, and the process of the upper and lower chains is more stable.

此外，當該第一導輪14由該第一位置往該第二位置移動時，代表該鏈條54由小尺寸的齒盤轉換至大尺寸的齒盤。此時，該第一導輪14與該飛輪56的大尺寸的齒盤間的距離也會加大，如此可降低該鏈條54產生鏈面歪斜的現象，以提升穩定傳動系統之張力。 In addition, when the first guide wheel 14 moves from the first position to the second position, it means that the chain 54 is converted from a small-sized chainring to a large-sized chainring. At this time, the distance between the first guide wheel 14 and the large-sized chainring of the flywheel 56 will also increase, so that the chain surface skew phenomenon of the chain 54 can be reduced, and the tension of the stable transmission system can be improved.

上述實施例僅為例示性說明本發明之技術及其功效，而非用於限制本發明。任何熟於此項技術人士均可在不違背本發明之技術原理及精神的情況下，對上述實施例進行修改及變化，因此本發明之權利保護範圍應如後所述之申請專利範圍所列。 The above-mentioned embodiments are merely illustrative of the technology and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with this technology can modify and change the above-mentioned embodiments without violating the technical principle and spirit of the present invention. Therefore, the scope of protection of the rights of the present invention should be listed in the scope of patent application described later. .

10:導鏈器 10: Chain guide

12:主體 12: main body

14:第一導輪 14: The first guide wheel

16:第二導輪 16: second guide wheel

18:主臂 18: main arm

20:擺臂 20: swing arm

30:延伸板片 30: Extension plate

34:導槽 34: Guide groove

36:支柱 36: Pillar

50:導軸 50: guide shaft

52:彈性件 52: Elastic part

Claims

一種自行車後變速器之導鏈器，包含有：一主體，具有一第一端以及一第二端；一第一導輪，樞設於該主體的該第一端，可自由轉動，並可於一第一位置與一第二位置間移動；一第二導輪，樞設於該主體的該第二端，可自由轉動；以及一彈性件，設置於該第一導輪與該主體之間，施予該第一導輪一彈力，使該第一導輪有由該第二位置往該第一位置移動之趨勢。 A chain guide for a bicycle rear derailleur, comprising: a main body with a first end and a second end; a first guide wheel pivoted on the first end of the main body, freely rotatable, and Move between a first position and a second position; a second guide wheel, which is pivoted on the second end of the main body to be freely rotatable; and an elastic member, which is arranged between the first guide wheel and the main body , Applying an elastic force to the first guide wheel, so that the first guide wheel has a tendency to move from the second position to the first position.

依據請求項1所述之自行車後變速器之導鏈器，其中該主體設有一導槽，該第一導輪具有一導軸伸入該導槽，使該第一導輪沿該導槽移動。 The chain guide of a bicycle rear derailleur according to claim 1, wherein the main body is provided with a guide groove, and the first guide wheel has a guide shaft extending into the guide groove to move the first guide wheel along the guide groove.

依據請求項2所述之具有自行車後變速器之導鏈器，其中該主體的該第一端處具有一延伸板，其上設有該導槽。 The chain guide with bicycle rear derailleur according to claim 2, wherein the first end of the main body has an extension plate on which the guide groove is provided.

依據請求項2所述之自行車後變速器之導鏈器，其中該主體上設有一支柱，該彈性件的二端分別連接於該支柱與該第一導輪之該導軸。 The chain guide of a bicycle rear derailleur according to claim 2, wherein the main body is provided with a pillar, and two ends of the elastic member are respectively connected to the pillar and the guide shaft of the first guide wheel.

依據請求項1所述之自行車後變速器之導鏈器，其中該主體具有一主臂以及一擺臂；該擺臂之一端樞設於該主臂，另一端樞設有該第一導輪。 The chain guide of a bicycle rear derailleur according to claim 1, wherein the main body has a main arm and a swing arm; one end of the swing arm is pivoted to the main arm, and the other end is pivoted to the first guide wheel.

依據請求項1所述之自行車後變速器之導鏈器，其中該主體具有一主臂以及一擺臂；該擺臂之一端樞設於該主臂；該第一導輪透過一導軸樞設於該擺臂；該主臂設有一導槽，該導軸伸入該導槽。 The chain guide of a bicycle rear derailleur according to claim 1, wherein the main body has a main arm and a swing arm; one end of the swing arm is pivoted on the main arm; the first guide wheel is pivoted through a guide shaft On the swing arm; the main arm is provided with a guide groove, and the guide shaft extends into the guide groove.

依據請求項6所述之自行車後變速器之導鏈器，其中該主體更具有一支撐臂；該擺臂之一端與該支撐臂之一端透過一銷連接於該主臂；該第二導輪位於該主臂與該支撐臂之間，並透過一輪軸樞設於該主臂與該支撐臂。 The chain guide for a bicycle rear derailleur according to claim 6, wherein the main body further has a support arm; one end of the swing arm and one end of the support arm are connected to the main arm through a pin; and the second guide wheel is located The main arm and the supporting arm are pivoted between the main arm and the supporting arm through a wheel shaft.