TWI682873B - Drivetrain for bicycle and structure of chainring installation thereof - Google Patents
Drivetrain for bicycle and structure of chainring installation thereof Download PDFInfo
- Publication number
- TWI682873B TWI682873B TW107129769A TW107129769A TWI682873B TW I682873 B TWI682873 B TW I682873B TW 107129769 A TW107129769 A TW 107129769A TW 107129769 A TW107129769 A TW 107129769A TW I682873 B TWI682873 B TW I682873B
- Authority
- TW
- Taiwan
- Prior art keywords
- sleeve
- mandrel
- mounting structure
- rotation axis
- crank
- Prior art date
Links
Images
Landscapes
- Transmission Devices (AREA)
Abstract
Description
本發明是有關於一種自行車,且是有關於一種自行車的傳動系統(drivetrain)及其齒盤安裝結構。The invention relates to a bicycle, and relates to a bicycle drivetrain and its gear mounting structure.
目前市售的變速自行車具備例如圖1所示的傳動系統。請參閱圖1,其繪示現有變速自行車用的傳動系統100的俯視示意圖。圖1中的傳動系統100屬於1X傳動系統,並包括鏈條110、後飛輪120與前齒盤130。前齒盤130為單一片齒盤,並連接曲柄(未繪示),而後飛輪120具有多個彼此堆疊的鏈輪121,並連接後車輪(未繪示)。At present, commercially available shift bicycles have, for example, the transmission system shown in FIG. 1. Please refer to FIG. 1, which illustrates a schematic top view of a
這些鏈輪121的尺寸彼此不同。從圖1來看,這些鏈輪121依尺寸由大到小依序從上排列到下,所以圖1最上面的鏈輪121具有最大直徑,而圖1最下面的鏈輪121具有最小直徑。鏈條110嚙合於後飛輪120與前齒盤130,並具有撓度,以使鏈條110能沿著後飛輪120轉軸A12與前齒盤130轉軸A13的方向彎曲。如此,鏈條110可以選擇地嚙合於其中一片鏈輪121,以達到變速的功能。The sizes of these
然而,沿著轉軸A12與轉軸A13方向彎曲的鏈條110會產生側向應力,造成後飛輪120與前齒盤130兩者與鏈條110之間產生摩擦力。鏈條110彎曲(沿著轉軸A12與轉軸A13方向)幅度越大,上述側向應力也越大,從而產生越大的摩擦力。一旦摩擦力大過一定程度,不僅在騎乘自行車的時候會製造較大的噪音,而且也會加速鏈條110、後飛輪120以及前齒盤130的磨損,甚至也可能增加鏈條110脫離後飛輪120或前齒盤130的風險。However, the
本發明提供一種齒盤安裝結構,其利用偏擺組件與心軸之間所產生的軸向偏擺來降低上述摩擦力。The invention provides a gear plate mounting structure, which utilizes the axial deflection generated between the deflection assembly and the mandrel to reduce the above-mentioned frictional force.
本發明所提供的齒盤安裝結構,其包括曲柄、心軸以及偏擺組件。心軸包括第一旋轉軸,而心軸的一端與曲柄連接。曲柄帶動心軸,以使心軸以第一旋轉軸為軸心而旋轉。偏擺組件套設於心軸靠近曲柄之一端,且不與曲柄接觸。偏擺組件相對於心軸產生軸向偏擺,並包括第二旋轉軸並以其為軸心樞轉,其中第二旋轉軸通過第一旋轉軸。The cogging installation structure provided by the present invention includes a crank, a mandrel and a yaw assembly. The mandrel includes a first rotating shaft, and one end of the mandrel is connected to the crank. The crank drives the mandrel so that the mandrel rotates around the first rotation axis. The yaw assembly is sleeved on one end of the mandrel close to the crank and does not contact the crank. The yaw assembly generates an axial yaw with respect to the mandrel, and includes a second rotation shaft and pivots about the second rotation shaft, wherein the second rotation shaft passes through the first rotation shaft.
在本發明的一實施例中,上述第一旋轉軸位於一平面。此平面為水平面,其中第二旋轉軸與平面間有夾角。In an embodiment of the invention, the first rotation axis is located on a plane. This plane is a horizontal plane, and there is an angle between the second rotation axis and the plane.
在本發明的一實施例中,上述夾角為銳角。In an embodiment of the invention, the included angle is an acute angle.
在本發明的一實施例中,上述夾角大於30度小於90度。In an embodiment of the invention, the included angle is greater than 30 degrees and less than 90 degrees.
在本發明的一實施例中,上述偏擺組件包括第一套筒、第二套筒以及第三套筒。第一套筒以徑向外周緣與第三套筒之徑向內周緣連接,並以位於相反側之徑向內周緣套設於心軸。第二套筒之徑向外周緣與齒盤連接,並以位於相反側之徑向內周緣與第三套筒之徑向外周緣連接。第三套筒設置於第一套筒與第二套筒之間。In an embodiment of the invention, the deflection assembly includes a first sleeve, a second sleeve, and a third sleeve. The first sleeve is connected to the radial inner peripheral edge of the third sleeve by a radial outer peripheral edge, and is sleeved on the mandrel by a radial inner peripheral edge located on the opposite side. The radial outer periphery of the second sleeve is connected to the gear disc, and the radial inner periphery of the third sleeve is connected to the radial outer periphery of the third sleeve. The third sleeve is disposed between the first sleeve and the second sleeve.
在本發明的一實施例中,上述偏擺組件包括中介件。中介件設置於第一套筒與第三套筒之間,以使第一套筒相對於第三套筒轉動。In an embodiment of the invention, the deflection assembly includes an intermediary member. The intermediary member is disposed between the first sleeve and the third sleeve, so that the first sleeve rotates relative to the third sleeve.
在本發明的一實施例中,上述中介件為軸承。In an embodiment of the invention, the intermediary member is a bearing.
在本發明的一實施例中,上述第三套筒包括兩樞接部。兩樞接部點對稱地設於第三套筒之外周緣,且第二旋轉軸通過兩樞接部,使偏擺組件以第二旋轉軸為軸心樞轉。In an embodiment of the invention, the third sleeve includes two pivotal portions. The two pivoting portions are symmetrically disposed on the outer periphery of the third sleeve, and the second rotating shaft passes through the two pivoting portions, so that the yaw assembly pivots around the second rotating shaft.
在本發明的一實施例中,上述偏擺組件包括固定架。固定架的外周緣設有軸向延伸的兩連接部與徑向延伸的至少一安裝部。兩連接部套設於第三套筒之兩樞接部,而至少一安裝部鎖固於一自行車車架。In an embodiment of the invention, the deflection assembly includes a fixing frame. The outer periphery of the fixing frame is provided with two connecting portions extending in the axial direction and at least one mounting portion extending in the radial direction. The two connecting portions are sleeved on the two pivoting portions of the third sleeve, and at least one mounting portion is locked to a bicycle frame.
在本發明的一實施例中,上述心軸朝向曲柄之外周緣設有凸緣部,而凸緣部設有多個第一導引槽。第一套筒之內周緣設有多個第二導引槽,其中偏擺組件還包括滑動件。滑動件安裝於第一導引槽及第二導引槽之間,以使偏擺組件相對於心軸產生軸向移動。In an embodiment of the invention, the mandrel is provided with a flange portion toward the outer periphery of the crank, and the flange portion is provided with a plurality of first guide grooves. The inner periphery of the first sleeve is provided with a plurality of second guide grooves, wherein the deflection assembly further includes a sliding member. The slider is installed between the first guide groove and the second guide groove, so that the yaw assembly moves axially relative to the mandrel.
在本發明的一實施例中,上述第一導引槽和第二導引槽平行於第一旋轉軸。In an embodiment of the invention, the first guide groove and the second guide groove are parallel to the first rotation axis.
在本發明的一實施例中,上述第一導引槽和第二導引槽不平行於第一旋轉軸。In an embodiment of the invention, the first guide groove and the second guide groove are not parallel to the first rotation axis.
在本發明的一實施例中,上述滑動件包括多個滾珠,而這些滾珠相對應地安裝於這些第一導引槽和這些第二導引槽之間。In an embodiment of the invention, the sliding member includes a plurality of balls, and the balls are correspondingly installed between the first guide grooves and the second guide grooves.
在本發明的一實施例中,上述心軸朝向曲柄處設有凸肋部。凸肋部包括沿著心軸外周緣徑向排列的多個凸肋。第一套筒之內周緣設有多個第一導引槽,其中偏擺組件還包括多個滑動件。這些滑動件相對應地安裝於這些凸肋上,且這些凸肋相對應地安裝於這些第一導引槽,以使偏擺組件相對於心軸產生軸向移動。In an embodiment of the invention, the mandrel is provided with a rib portion toward the crank. The rib portion includes a plurality of ribs arranged radially along the outer periphery of the mandrel. The inner periphery of the first sleeve is provided with a plurality of first guide grooves, wherein the deflection assembly further includes a plurality of sliding members. The sliders are correspondingly mounted on the convex ribs, and the convex ribs are correspondingly mounted on the first guide grooves, so that the yaw assembly moves axially relative to the mandrel.
在本發明的一實施例中,上述滑動件為轉子。In an embodiment of the invention, the sliding member is a rotor.
在本發明的一實施例中,上述偏擺組件還包括一限位圈。限位圈套設於第一套筒與凸肋部之間。限位圈之構型和第一套筒以及凸肋部配合,以使偏擺組件相對於心軸有限制地軸向移動。In an embodiment of the invention, the deflection assembly further includes a limit ring. The limiting ring is disposed between the first sleeve and the convex rib. The configuration of the limit ring cooperates with the first sleeve and the convex rib portion, so that the deflection assembly is restricted to move axially relative to the mandrel.
在本發明的一實施例中,上述限位圈包括多個第二導引槽與擋止部。這些第二導引槽相對應地套設於這些凸肋。擋止部之構型與第一套筒的第一導引槽配合。In an embodiment of the invention, the limit ring includes a plurality of second guide grooves and blocking portions. The second guide grooves are sleeved on the ribs correspondingly. The configuration of the stopper part cooperates with the first guide groove of the first sleeve.
在本發明的一實施例中,上述心軸朝向曲柄處設有棘爪部。棘爪部包括沿著心軸外周緣徑向排列的多個基座和多個棘爪。這些棘爪相對應地樞接於這些基座,且各個棘爪設有凸肋。第一套筒之內周緣設有多個導引槽,其中棘爪部還包括多個滑動件。這些滑動件相對應地安裝於這些凸肋上,且這些凸肋相對應地安裝於這些導引槽之間,以使偏擺組件相對於心軸產生軸向移動。In an embodiment of the invention, the mandrel is provided with a detent portion toward the crank. The pawl portion includes a plurality of bases and a plurality of pawls arranged radially along the outer periphery of the mandrel. The pawls are pivotally connected to the bases correspondingly, and each pawl is provided with a convex rib. The inner periphery of the first sleeve is provided with a plurality of guide grooves, wherein the pawl portion further includes a plurality of sliding members. The sliders are correspondingly installed on the convex ribs, and the convex ribs are correspondingly installed between the guide grooves, so that the yaw assembly moves axially relative to the mandrel.
在本發明的一實施例中,上述滑動件為轉子。In an embodiment of the invention, the sliding member is a rotor.
在本發明的一實施例中,上述齒盤安裝結構還包括彈性件。彈性件套設於心軸接近棘爪部處。彈性件徑向延伸有多個彈性部,而這些彈性部相對應地抵頂於這些棘爪。In an embodiment of the present invention, the above-mentioned gear mounting structure further includes an elastic member. The elastic member is sleeved on the mandrel close to the pawl portion. The elastic member extends radially with a plurality of elastic portions, and the elastic portions correspondingly abut the pawls.
本發明所提供的傳動系統包括曲柄、心軸、偏擺組件、後齒盤以及傳動件。心軸包括第一旋轉軸,而心軸之一端與曲柄連接。曲柄帶動心軸相對於第一旋轉軸旋轉。偏擺組件套設於心軸靠近曲柄之一端,且不與曲柄接觸,以使偏擺組件相對於心軸產生軸向偏擺。偏擺組件包括前齒盤與第二旋轉軸,其中第二旋轉軸通過第一旋轉軸。後齒盤包括第三旋轉軸,而傳動件嚙合於前齒盤與後齒盤,其中第一旋轉軸和第三旋轉軸位於一共平面,而第二旋轉軸和共平面間有夾角。The transmission system provided by the present invention includes a crank, a mandrel, a yaw assembly, a rear sprocket, and a transmission part. The mandrel includes a first rotating shaft, and one end of the mandrel is connected to the crank. The crank drives the mandrel to rotate relative to the first rotation axis. The yaw assembly is sleeved on one end of the mandrel close to the crank and does not contact the crank, so that the yaw assembly produces an axial yaw relative to the mandrel. The yaw assembly includes a front sprocket and a second rotating shaft, wherein the second rotating shaft passes through the first rotating shaft. The rear sprocket includes a third rotation shaft, and the transmission member meshes with the front sprocket and the rear sprocket, wherein the first rotation shaft and the third rotation shaft are located in a common plane, and the second rotation shaft and the common plane have an included angle.
在本發明的一實施例中,上述夾角為銳角。In an embodiment of the invention, the included angle is an acute angle.
在本發明的一實施例中,上述夾角大於30度小於90度。In an embodiment of the invention, the included angle is greater than 30 degrees and less than 90 degrees.
基於上述,由於偏擺組件能以第二旋轉軸作為軸心而樞轉,因此偏擺組件能相對於心軸產生軸向偏擺。如此,可幫助減少側向應力,降低摩擦力,進而減少騎乘時所產生的噪音與傳動件的磨損。Based on the above, since the yaw assembly can pivot with the second rotating shaft as the axis, the yaw assembly can generate an axial yaw relative to the mandrel. In this way, it can help reduce lateral stress and friction, thereby reducing the noise and wear of the transmission parts during riding.
為讓本發明上述特徵和優點能更明顯易懂,下文特舉實施例,並配合所附圖式,作詳細說明如下。In order to make the above-mentioned features and advantages of the present invention more obvious and understandable, the embodiments are specifically described below, and in conjunction with the accompanying drawings, detailed descriptions are as follows.
有關本發明的前述及其他技術內容、特點與功效,在以下配合參考圖式的實施例中,將可清楚地呈現。此外,以下實施例中所提到的方向用語,例如:上、下、左、右、前或後等,僅是參考附加圖式的方向。因此,使用的方向用語是僅只用來說明,以幫助本發明所屬技術領域中具有通常知識理解本發明特徵與功效,並非用來限制本發明。The foregoing and other technical contents, features and effects of the present invention will be clearly presented in the following embodiments with reference to the drawings. In addition, the directional terms mentioned in the following embodiments, for example: up, down, left, right, front or back, etc., are only the directions referring to the attached drawings. Therefore, the directional terminology used is only for illustration, to help people with common knowledge in the technical field to which the present invention belongs understand the features and effects of the present invention, and is not intended to limit the present invention.
圖2A是本發明一實施例的齒盤安裝結構的立體示意圖,而圖2B是圖2A中的齒盤安裝結構的***示意圖。請參閱圖2A與圖2B,齒盤安裝結構200包括曲柄210以及心軸220。心軸220包括第一旋轉軸R1,其實質上等同於心軸220的軸心,而心軸220之一端與曲柄210連接。當曲柄210沿著第一旋轉軸R1而旋轉時,曲柄210能帶動心軸220,以使心軸220以第一旋轉軸R1為軸心而旋轉。FIG. 2A is a perspective schematic view of a cogging installation structure according to an embodiment of the present invention, and FIG. 2B is an exploded schematic view of the cogging installation structure in FIG. 2A. Please refer to FIG. 2A and FIG. 2B, the
齒盤安裝結構200還包括偏擺組件230,而偏擺組件230套設於心軸220靠近曲柄210之一端,其中偏擺組件230不與曲柄210接觸,並可活動地套設於心軸220,即偏擺組件230能相對於心軸220而活動。偏擺組件230包括第二旋轉軸R2,並以第二旋轉軸R2為軸心樞轉,以使偏擺組件230能相對於心軸220而偏擺,其中第二旋轉軸R2通過第一旋轉軸R1,即第二旋轉軸R2與第一旋轉軸R1相交。偏擺組件230連接齒盤240,而齒盤240可以是自行車的前齒盤,並且能囓合例如鏈條或皮帶等傳動件。The cogging mounting
當曲柄210沿著第一旋轉軸R1而旋轉時,心軸220也會跟著旋轉,並帶動偏擺組件230,以使偏擺組件230以第一旋轉軸R1為軸心而旋轉。旋轉中的偏擺組件230能帶動齒盤240旋轉,而旋轉的齒盤240能驅動傳動件(例如鏈條),並利用傳動件將動力傳遞至自行車的後飛輪,進而讓自行車移動。由於偏擺組件230能以第二旋轉軸R2為軸心樞轉,因此在騎乘自行車以及進行變速的過程中,偏擺組件230可受傳動件的驅使而相對於心軸220偏擺,以降低後飛輪與齒盤240兩者與傳動件之間的摩擦力,減少騎乘時所產生的噪音與傳動件及齒盤的磨損。
When the
偏擺組件230還包括固定架250,而固定架250可固定於自行車車架,以使齒盤安裝結構200得以裝設在自行車上。在圖2A與圖2B所示的實施例中,固定架250的外周緣設有徑向延伸的至少一安裝部251。以圖2A與圖2B為例,固定架250具有三個安裝部251,但圖2A與圖2B所揭露的安裝部251的數量不限定於本實施例。這些安裝部251各自具有開口(未標示),以供螺絲插設,從而讓這些安裝部251可以鎖固於自行車車架。換句話說,在圖2A與圖2B所示的實施例中,固定架250是利用鎖固的手段而固定於車架。然而,在其他實施例中,固定架250也可採用其他技術手段而固定於車架,例如焊接或鉚接。因此,固定架250與車架之間的固定手段不限定只採用鎖固。
The
圖2C是圖2A中的齒盤安裝結構的側視示意圖。請參閱圖2B與圖2C,偏擺組件230還包括第一套筒231、第二套筒232及第三套筒233。第一套筒231、第二套筒232以及第三套筒233大致上彼此呈同心圓排列,其中第三套筒233設置於第一套筒231與第二套筒232之間。詳細而言,第一套筒231的徑向外周緣與第三套筒233的徑向內周緣連接,且第一套筒231以位於徑向外周緣相反側的徑向內周緣套設於心軸220,所以第一套筒231圍繞心軸220,並位於心軸220與第三套筒233之間。第二套筒232的徑向外周緣與齒盤240連接,且第二套筒232以位於徑向外周緣相反側的徑向內周緣與第三套筒233的徑向外周緣連接,所以第二套筒232圍繞第三套筒233。
Fig. 2C is a schematic side view of the mounting structure of the cog in Fig. 2A. 2B and 2C, the
第三套筒233能與固定架250樞接。具體而言,第三套筒233包括兩個樞接部2331,而固定架250的外周緣設有軸向延伸的兩連接部252。各樞接部2331可為凸柱,而各連接部252可具有開口,其中這些樞接部2331能分別穿設於這些連接部252的開口,以使這兩個連接部252套設於第三套筒233的兩個樞接部2331。此外,這兩個樞接部2331是點對稱地設於第三套筒233的外周緣,因此第二旋轉軸R2會通過第三套筒233的軸心,使偏擺組件230能以第二旋轉軸R2為軸心而相對於固定架250樞轉。The
偏擺組件230還可包括中介件234,其可以是軸承,如圖2B所示。在圖2B所示的實施例中,中介件234包括組裝環234a以及多粒滾珠234b,其中這些滾珠234b裝設於組裝環234a上。中介件234設置於第一套筒231與第三套筒233之間,而這些滾珠234b接觸於第一套筒231的徑向外周緣與第三套筒233的徑向內周緣。當第一套筒231旋轉時,雖然第三套筒233因樞接固定架250而不會跟著第一套筒231旋轉,但中介件234能使第一套筒231相對於第三套筒233轉動,讓第一套筒231的旋轉不會被第三套筒233所干涉。The
中介件234也能限制第一套筒231與第三套筒233之間的相對位移,以穩定轉動中的第一套筒231,進而避免第一套筒231從第三套筒233脫離。此外,第一旋轉軸R1可以位於平面CP1,其可為水平面。第二旋轉軸R2與平面CP1間有夾角θ1,其為銳角,所以第一旋轉軸R1明顯不垂直於平面CP1(水平面),其中夾角θ1可大於30度小於90度。The
偏擺組件230還可包括滑動件235,其中滑動件235安裝於心軸220與第一套筒231之間。滑動件235可包括限位環235a以及多粒滾珠235b,其中限位環235a可具有多個開口(未標示),而這些滾珠235b能分別配置於限位環235a的這些開口中。此外,在本實施例中,這些滾珠235b分別配置於心軸220與第一套筒231兩者的溝槽內,以使這些滾珠235b能被侷限在心軸220與第一套筒231之間。The
詳細而言,心軸220朝向曲柄210的外周緣設有凸緣部221,而凸緣部221設有多條第一導引槽2211,而第一套筒231的內周緣設有多條第二導引槽2311,其中這些第一導引槽2211和第二導引槽2311可平行於第一旋轉軸R1(如圖2B所示),所以第一導引槽2211與其對應的第二導引槽2311兩者的延伸方向可以彼此相同。滑動件235的這些滾珠235b相對應地安裝於這些第一導引槽2211與這些第二導引槽2311之間,以使各滾珠235b得以被第一導引槽2211、第二導引槽2311以及限位環235a侷限而難以從心軸220與第一套筒231脫離。In detail, the
圖2D是圖2A中的齒盤安裝結構的剖面立體示意圖,其中圖2D是沿著圖2C中的平面CP1剖視而繪製。請參閱圖2B與圖2D,利用滑動件235的這些滾珠235b,第一套筒231能與心軸220相對活動,以使偏擺組件230相對於心軸220產生軸向移動。因此,偏擺組件230能沿著第一旋轉軸R1而相對於心軸220些許的相對運動,以降低後飛輪與齒盤240兩者與傳動件之間的摩擦力,進而有效減少噪音與磨損。FIG. 2D is a schematic cross-sectional perspective view of the mounting structure of the chainring in FIG. 2A, wherein FIG. 2D is drawn along a plane CP1 in FIG. 2C. 2B and 2D, using the
另外,位於第一導引槽2211與第二導引槽2311之間的滾珠234b可以傳遞動力,以使心軸220能帶動第一套筒231。詳細而言,當心軸220沿著第一旋轉軸R1而旋轉時,這些位於第一導引槽2211與第二導引槽2311之間的滾珠235b也能跟著心軸220一起繞著第一旋轉軸R1而旋轉,而這些旋轉的滾珠235b可以帶動第一套筒231,以使第一套筒231也能跟著心軸220一起沿著第一旋轉軸R1而旋轉。如此,沿著第一旋轉軸R1旋轉的心軸220得以帶動偏擺組件230,以使偏擺組件230能以第一旋轉軸R1為軸心而旋轉。In addition, the
必須說明的是,在圖2B所示的實施例中,滑動件235包括限位環235a,但在其他實施例中,即使滑動件235不包括限位環235a,第一導引槽2211與第二導引槽2311也具有侷限滾珠235b的功能,以使這些滾珠235b不易從心軸220與第一套筒231脫離,而且這些滾珠235b也能傳遞動力,讓偏擺組件230可被心軸220帶動而沿著第一旋轉軸R1旋轉。因此,滑動件235可以不包括限位環235a,即滑動件235不限定一定要包括限位環235a。It must be noted that, in the embodiment shown in FIG. 2B, the
圖2E與圖2F是圖2C中的剖面示意圖,其中圖2E與圖2F都是沿著圖2C中的平面2E剖視而繪製。請參閱圖2B、圖2E與圖2F,偏擺組件230能以第二旋轉軸R2為軸心而相對於固定架250樞轉,而偏擺組件230不與曲柄210接觸,因此偏擺組件230與曲柄210之間形成活動間隙G1,如圖2E與圖2F所示,偏擺組件230相對於固定架250的樞轉不會被曲柄210干涉。此外,中介件234能使第一套筒231的旋轉不被第三套筒233干涉。在騎乘自行車與進行變速的時候,偏擺組件230能沿著第二旋轉軸R2擺動,讓齒盤240能受傳動件(例如鏈條)的驅使而相對於心軸220產生軸向偏擺,以降低後飛輪與齒盤240兩者與傳動件之間的摩擦力,進而減少騎乘時所產生的噪音與傳動件的磨損。2E and 2F are schematic cross-sectional diagrams in FIG. 2C, where both FIG. 2E and FIG. 2F are drawn along the plane 2E in FIG. 2C. 2B, 2E, and 2F, the
圖3是本發明另一實施例的齒盤安裝結構的***示意圖。請參與圖3,齒盤安裝結構300與前述實施例的齒盤安裝結構200相似。例如,兩者也包括相同元件,且也具有相同的功效。以下主要敘述齒盤安裝結構300與200之間的差異,相同技術特徵原則上不再重複敘述。FIG. 3 is an exploded schematic view of a gear mounting structure of another embodiment of the present invention. Please refer to FIG. 3, the
齒盤安裝結構300包括心軸320與偏擺組件330。心軸320的外周緣設有凸緣部321,而凸緣部321設有多條第一導引槽3211。偏擺組件330包括第一套筒331,而對應這些第一導引槽3211,第一套筒331的內周緣設有多條第二導引槽3311,其中各條第一導引槽3211與其對應的第二導引槽3311兩者的延伸方向可以彼此相同。不過,有別於圖2B中的第一導引槽2211與第二導引槽2311,從圖3可明顯看出,這些第一導引槽3211與這些第二導引槽3311不平行於第一旋轉軸R1。此外,圖3中的偏擺組件330還包括滑動件,其也安裝於心軸320與第一套筒331之間,其中此滑動件包括多粒滾珠335。不過,不同於圖2B中的滑動件235,圖3中的滑動件僅包括這些滾珠335,未包括其他元件,例如圖2B中的限位環235a。The
圖4A是本發明另一實施例的齒盤安裝結構的立體示意圖,而圖4B是圖4A中的齒盤安裝結構的***示意圖。請參閱圖4A與圖4B,本實施例的齒盤安裝結構400與前述實施例中的齒盤安裝結構200相似。例如,齒盤安裝結構400也包括心軸420與偏擺組件430,其中心軸420能以第一旋轉軸R1為軸心而旋轉,而偏擺組件430也包括固定架250與第三套筒233。固定架250與第三套筒233樞接,以使偏擺組件430能以第二旋轉軸R2為軸心而相對於心軸420偏擺,其中第二旋轉軸R2通過第一旋轉軸R1。不過,有別於前述實施例中的齒盤安裝結構200,心軸420朝向曲柄210處設有凸肋部421,而凸肋部421包括沿著心軸420的外周緣徑向排列的多個凸肋4211。以圖4B為例,這些凸肋4211呈輻射狀排列,並且從心軸420的外周緣徑向外延伸。FIG. 4A is a perspective schematic view of a cogging installation structure according to another embodiment of the present invention, and FIG. 4B is an exploded schematic view of the cogging installation structure in FIG. 4A. Please refer to FIG. 4A and FIG. 4B. The
圖4C是圖4B中的齒盤安裝結構在其凸肋部的局部放大示意圖。請參閱圖4B與圖4C,偏擺組件430包括多個滑動件435,而這些滑動件435相對應地安裝於這些凸肋4211上。滑動件435可以是轉子,因此滑動件435的形狀為中空圓筒狀,且滑動件435具有通孔(未標示)。在這些滑動件435相對應地安裝於這些凸肋4211上,也就是這些滑動件435的通孔分別被這些凸肋4211插設,因此滑動件435能相對於凸肋4211而自轉(spin)。4C is a partially enlarged schematic view of the rib portion of the spur mounting structure in FIG. 4B. 4B and 4C, the
偏擺組件430還包括第一套筒431,而第一套筒431的內周緣設有多個第一導引槽4311,其中這些凸肋4211與這些滑動件435相對應地安裝於這些第一導引槽4311。由於滑動件435能相對於凸肋4211而自轉,因此這些安裝於第一導引槽4311的凸肋4211與滑動件435可以使偏擺組件430相對於心軸420產生軸向移動,從而有助於偏擺組件430相對於心軸420偏擺。The
圖4D是圖4A中的齒盤安裝結構的側視示意圖。請參閱圖4B至圖4D,不同於前述圖2B中的第二導引槽2311,圖4B中的各個第一導引槽4311具有缺口4312,其中這些缺口4312可形成於第一套筒431的同一側,以使凸肋部421與這些滑動件435得以從這些缺口4312裝入於這些第一導引槽4311內。此外,在圖4B與圖4C所示的實施例中,心軸420與曲柄210可為兩個獨立元件。Fig. 4D is a schematic side view of the mounting structure of the cog in Fig. 4A. Please refer to FIGS. 4B to 4D. Unlike the
偏擺組件430還包括限位圈436,其套設於第一套筒431與凸肋部421之間,其中限位圈436之構型和第一套筒431以及凸肋部421配合,以使偏擺組件430相對於心軸420有限制地軸向移動。具體而言,限位圈436可包括多個第二導引槽4361與擋止部4362,其中這些第二導引槽4361相對應地套設於這些凸肋4211與滑動件435,即這些凸肋4211與這些滑動件435分別位於這些第二導引槽4361內。各個第二導引槽4361可為無底的開口,因此這些凸肋4211能分別從這些第二導引槽4361貫穿限位圈436。The
擋止部4362的形狀基本上為環狀,而這些第二導引槽4361皆從擋止部4362的一側朝向曲柄210軸向延伸。在限位圈436套設於第一套筒431與凸肋部421之間之後,擋止部4362之構型與第一套筒431的第一導引槽4311配合。以圖4B與圖4C為例,擋止部4362具有沿著限位圈436的外周緣徑向排列的多個凸塊(未標示),其中凸塊的形狀與缺口4312的形狀配合,以使這些凸塊分別填入於這些缺口4312。如此,擋止部4362之構型得以與第一套筒431的第一導引槽4311配合。The shape of the
圖4E是圖4D中沿線4E-4E剖視的剖面示意圖。請參閱圖4D與圖4E,在齒盤安裝結構400中,由於這些凸肋4211分別安裝於這些第一導引槽4311內,因此這些凸肋4211也能傳遞動力,以使心軸420能帶動第一套筒431。當心軸420沿著第一旋轉軸R1而旋轉時,這些凸肋4211與滑動件435也能跟著心軸420一起繞著第一旋轉軸R1而旋轉。因此,這些凸肋4211能帶動第一套筒431,以使第一套筒431也能跟著心軸420一起沿著第一旋轉軸R1而旋轉。如此,沿著第一旋轉軸R1旋轉的心軸420能使偏擺組件430以第一旋轉軸R1為軸心而旋轉。4E is a schematic cross-sectional view taken along
偏擺組件430也能以第二旋轉軸R2為軸心而相對於固定架250樞轉,其中偏擺組件430也不與曲柄210接觸。因此,曲柄210基本上不會干涉偏擺組件430與固定架250之間的相對樞轉。其次,凸肋4211與滑動件435能使偏擺組件430相對於心軸420產生軸向移動。再者,齒盤安裝結構400也包括中介件234,其能使第一套筒431的旋轉不被第三套筒233所干涉,讓心軸420能順利地帶動第一套筒431旋轉。如此,在騎乘自行車與進行變速的時候,偏擺組件430能沿著第二旋轉軸R2擺動,讓齒盤240能受傳動件(例如鏈條)的驅使而相對於心軸420產生軸向偏擺,以降低後飛輪與齒盤240兩者與傳動件之間的摩擦力。The
圖5A是本發明另一實施例的齒盤安裝結構的立體示意圖,而圖5B是圖5A中的齒盤安裝結構的***示意圖。請參閱圖5A與圖5B,本實施例的齒盤安裝結構500與前述實施例的齒盤安裝結構400相似。例如,齒盤安裝結構500與400包括相同的元件,且兩者功效相同。惟兩者之間的主要差異在於:齒盤安裝結構500所包括的心軸520結構不同於前述實施例中的心軸420結構。以下主要敘述齒盤安裝結構500與400之間的差異,相同技術特徵原則上不再重複敘述。FIG. 5A is a perspective schematic view of a cogging installation structure according to another embodiment of the present invention, and FIG. 5B is an exploded schematic view of the cogging installation structure in FIG. 5A. Please refer to FIG. 5A and FIG. 5B. The
齒盤安裝結構500包括偏擺組件530,而偏擺組件530包括第一套筒531,其中第一套筒531之內周緣設有多個導引槽5311。在齒盤安裝結構500中,心軸520朝向曲柄210處設有棘爪部521,而棘爪部521安裝於導引槽5311內,所以第一套筒531圍繞棘爪部521。棘爪部521能使偏擺組件530相對於心軸520產生軸向移動,從而有助於偏擺組件530相對於心軸520偏擺。The cogging mounting
圖5C是圖5B中的齒盤安裝結構在其樞接部的局部放大示意圖,而圖5D是圖5C中的齒盤安裝結構在其樞接部的***示意圖。請參閱圖5C與圖5D,在圖5C與圖5D所示的實施例中,棘爪部521可包括沿著心軸520外周緣徑向排列的多個基座5211和多個棘爪5212,其中這些棘爪5212相對應地樞接於這些基座5211。各個棘爪5212設有凸肋5213,其中凸肋5213位於棘爪5212的頂端,如圖5C所示。棘爪部521還可包括多個滑動件5214,其例如是轉子。這些滑動件5214相對應地安裝於這些凸肋5213上,以使滑動件5214能相對於凸肋5213而自轉。FIG. 5C is a partially enlarged schematic view of the cogging mounting structure in FIG. 5B at its pivoting portion, and FIG. 5D is an exploded schematic view of the cogging mounting structure in FIG. 5C at its pivoting portion. 5C and 5D, in the embodiment shown in FIGS. 5C and 5D, the
這些凸肋5213與這些滑動件5214相對應地安裝於這些導引槽5311之間,以使棘爪部521得以安裝於導引槽5311內。由於滑動件5214能相對於凸肋5213而自轉,因此這些安裝於導引槽5311的凸肋5213與滑動件5214可使偏擺組件530相對於心軸520產生軸向移動,進而有助於偏擺組件530相對於心軸520偏擺。此外,齒盤安裝結構500還可包括彈性件560。彈性件560套設於心軸520接近棘爪部521處,而彈性件560徑向延伸有多個彈性部561。這些彈性部561相對應地抵頂於這些棘爪5212,以使這些滑動件5214與這些棘爪5212的凸肋5213能保持在這些導引槽5311內,從而阻止滑動件5214與凸肋5213離開導引槽5311。The
另外,由於這些滑動件5214與這些棘爪5212的凸肋5213分別安裝於這些導引槽5311內,因此棘爪部521也能傳遞動力,以使心軸520能帶動第一套筒531。當心軸520沿著第一旋轉軸R1而旋轉時,棘爪部521也能跟著心軸520一起繞著第一旋轉軸R1而旋轉,並能帶動第一套筒531,以使第一套筒531也能跟著心軸520一起沿著第一旋轉軸R1而旋轉。如此,心軸520也能使偏擺組件530以第一旋轉軸R1為軸心而旋轉。In addition, since the
圖6是裝設本發明一實施例的傳動系統的自行車的側視示意圖。請參閱圖6,本實施例的傳動系統600可裝設於自行車60,並可包括以上所揭示的齒盤安裝結構200、300、400或500。因此,傳動系統600包括曲柄210、心軸(被曲柄210遮住而未繪示)以及偏擺組件630,其中心軸包括第一旋轉軸R1,而偏擺組件630可以是以上偏擺組件230、330、430以及530其中一者。因此,偏擺組件630包括前齒盤(例如以上實施例中的齒盤240)以及第二旋轉軸R2,並且能以第二旋轉軸R2為軸心樞轉,其中第二旋轉軸R2通過第一旋轉軸R1。6 is a schematic side view of a bicycle equipped with a transmission system according to an embodiment of the present invention. Referring to FIG. 6, the
傳動系統600還包括後齒盤650以及傳動件640,其中傳動件640嚙合於前齒盤與後齒盤650,並且可以是鏈條或皮帶,而後齒盤650包括第三旋轉軸R3。當曲柄210沿著第一旋轉軸R1旋轉時,前齒盤會跟著曲柄210一起旋轉,以帶動傳動件640。被前齒盤帶動的傳動件640能將動力傳遞至後齒盤650,以使後齒盤650能以第三旋轉軸R3為軸心而旋轉。如此,自行車60的後輪得以轉動,讓自行車60得以往前移動。The
第一旋轉軸R1和第三旋轉軸R3位於共平面CP2,而第二旋轉軸R2和共平面CP2間有夾角θ2,其可為銳角,其中夾角θ2可大於30度小於90度。因此,第二旋轉軸R2不會垂直於共平面CP2,並且能形成拖曳角(rake angle)θ3,如圖6所示。利用拖曳角θ3,可穩定偏擺組件630,以使偏擺組件630不至於過於頻繁地沿著第二旋轉軸R2而相對於心軸偏擺。如此,傳動件640能穩定地嚙合於前齒盤與後齒盤650,進而降低傳動件640脫離前齒盤或後齒盤650的風險。The first rotation axis R1 and the third rotation axis R3 are located in the coplanar CP2, and the second rotation axis R2 and the coplanar CP2 have an included angle θ2, which may be an acute angle, wherein the included angle θ2 may be greater than 30 degrees and less than 90 degrees. Therefore, the second rotation axis R2 is not perpendicular to the co-planar CP2, and a rake angle θ3 can be formed, as shown in FIG. 6. With the drag angle θ3, the
綜上所述,在本發明的傳動系統及齒盤安裝結構中,連接齒盤的偏擺組件可活動地套設於心軸,並且不與曲柄接觸,其中偏擺組件能以第二旋轉軸R2為軸心樞轉,並能相對於心軸產生軸向偏擺。如此,本發明的偏擺組件能幫助減少側向應力,降低前後齒盤兩者與傳動件(例如鏈條)之間的摩擦力,進而減少騎乘自行車時所產生的噪音以及傳動件的磨損。In summary, in the transmission system and the gear plate mounting structure of the present invention, the yaw assembly connected to the gear plate can be movably sleeved on the mandrel and does not contact the crank, wherein the yaw assembly can use the second rotation axis R2 is the pivot of the axis, and can produce axial deflection relative to the axis. In this way, the yaw assembly of the present invention can help reduce lateral stress, reduce friction between the front and rear chainrings and the transmission member (such as a chain), and thereby reduce noise and wear of the transmission member when riding a bicycle.
其次,上述第二旋轉軸R2通過心軸的第一旋轉軸R1,且第二旋轉軸R2不垂直於由前齒盤的旋轉軸(第一旋轉軸R1)與後齒盤的旋轉軸(第三旋轉軸R3)兩者所形成的共平面CP2,因此第二旋轉軸能形成拖曳角θ3,其中此拖曳角θ3能穩定偏擺組件,讓偏擺組件不會過於頻繁地偏擺。如此,傳動件能穩定地嚙合於前齒盤與後齒盤,降低傳動件脫離前齒盤或後齒盤的風險。Secondly, the second rotation axis R2 passes through the first rotation axis R1 of the mandrel, and the second rotation axis R2 is not perpendicular to the rotation axis of the front chainring (the first rotation axis R1) and the rotation axis of the rear chainring (the first Three rotation axes R3) The coplanar CP2 formed by the two, so the second rotation axis can form a drag angle θ3, wherein the drag angle θ3 can stabilize the yaw assembly so that the yaw assembly does not yaw too frequently. In this way, the transmission member can stably mesh with the front and rear gear wheels, reducing the risk of the transmission member disengaging from the front or rear gear wheels.
雖然本發明已以實施例揭露如上,然其並非用以限定本發明,本發明所屬技術領域中具有通常知識者,在不脫離本發明精神和範圍內,當可作些許更動與潤飾,因此本發明保護範圍當視後附的申請專利範圍所界定者為準。Although the present invention has been disclosed as above with examples, it is not intended to limit the present invention. Those with ordinary knowledge in the technical field to which the present invention belongs can make some modifications and retouching without departing from the spirit and scope of the present invention. The scope of protection of invention shall be subject to the scope defined in the appended patent application.
CP1‧‧‧平面CP1‧‧‧plane
60‧‧‧自行車60‧‧‧Bicycle
100、600‧‧‧傳動系統100, 600‧‧‧ transmission system
110‧‧‧鏈條110‧‧‧Chain
120‧‧‧後飛輪120‧‧‧Flywheel
121‧‧‧鏈輪121‧‧‧Sprocket
130‧‧‧前齒盤130‧‧‧Front chainring
200、300、400、500‧‧‧齒盤安裝結構200, 300, 400, 500 ‧‧‧ gear installation structure
210‧‧‧曲柄210‧‧‧Crank
220、320、420、520‧‧‧心軸220, 320, 420, 520 ‧‧‧ mandrel
221、321‧‧‧凸緣部221, 321‧‧‧ flange part
2211、3211、4311‧‧‧第一導引槽2211, 3211, 4311‧‧‧ First guide slot
230、330、430、530、630‧‧‧偏擺組件230, 330, 430, 530, 630
240‧‧‧齒盤240‧‧‧Sprocket
250‧‧‧固定架250‧‧‧Fixing frame
251‧‧‧安裝部251‧‧‧Installation Department
252‧‧‧連接部252‧‧‧Connecting Department
231、331、431、531‧‧‧第一套筒231,331,431,531‧‧‧First sleeve
232‧‧‧第二套筒232‧‧‧Second sleeve
233‧‧‧第三套筒233‧‧‧The third sleeve
2331‧‧‧樞接部2331‧‧‧Pivot Department
2311、3311‧‧‧第二導引槽2311, 3311‧‧‧Second guide groove
234‧‧‧中介件234‧‧‧Intermediary
234a‧‧‧組裝環234a‧‧‧Assembly ring
235、435、5214‧‧‧滑動件235, 435, 5214
235a‧‧‧限位環235a‧‧‧Limit ring
335、234b、235b‧‧‧滾珠335, 234b, 235b
421‧‧‧凸肋部421‧‧‧Convex rib
4211、5213‧‧‧凸肋4211, 5213‧‧‧rib
4312‧‧‧缺口4312‧‧‧Notch
436‧‧‧限位圈436‧‧‧Limit ring
4362‧‧‧擋止部4362‧‧‧stop
4361‧‧‧第二導引槽4361‧‧‧Second guide groove
521‧‧‧棘爪部521‧‧‧Pawl
5211‧‧‧基座5211‧‧‧Dock
5212‧‧‧棘爪5212‧‧‧Pawl
5311‧‧‧導引槽5311‧‧‧Guide groove
560‧‧‧彈性件560‧‧‧Elastic parts
561‧‧‧彈性部561‧‧‧Elastic Department
640‧‧‧傳動件640‧‧‧ Transmission parts
650‧‧‧後齒盤650‧‧‧Rear chainring
A12、A13‧‧‧轉軸A12, A13‧‧‧spindle
CP2‧‧‧共平面CP2‧‧‧Coplanar
G1‧‧‧活動間隙G1‧‧‧ Activity gap
R1‧‧‧第一旋轉軸R1‧‧‧ First axis of rotation
R2‧‧‧第二旋轉軸R2‧‧‧second rotation axis
R3‧‧‧第三旋轉軸R3‧‧‧The third rotation axis
θ1、θ2‧‧‧夾角θ1, θ2 ‧‧‧ included angle
θ3‧‧‧拖曳角θ3‧‧‧Drag angle
圖1是現有變速自行車的傳動系統的側視示意圖。 圖2A是本發明一實施例的齒盤安裝結構的立體示意圖。 圖2B是圖2A中的齒盤安裝結構的***示意圖。 圖2C是圖2A中的齒盤安裝結構的側視示意圖。 圖2D是圖2A中的齒盤安裝結構的剖面立體示意圖。 圖2E與圖2F是圖2C中的剖面示意圖。 圖3是本發明另一實施例的齒盤安裝結構的***示意圖。 圖4A是本發明另一實施例的齒盤安裝結構的立體示意圖。 圖4B是圖4A中的齒盤安裝結構的***示意圖。 圖4C是圖4B中的齒盤安裝結構在其凸肋部的局部放大示意圖。 圖4D是圖4A中的齒盤安裝結構的側視示意圖。 圖4E是圖4D中沿線4E-4E剖視的剖面示意圖。 圖5A是本發明另一實施例的齒盤安裝結構的立體示意圖。 圖5B是圖5A中的齒盤安裝結構的***示意圖。 圖5C是圖5B中的齒盤安裝結構在其樞接部的局部放大示意圖。 圖5D是圖5C中的齒盤安裝結構在其樞接部的***示意圖。 圖6是裝設本發明一實施例的傳動系統的自行車的側視示意圖。FIG. 1 is a schematic side view of a transmission system of a conventional variable speed bicycle. FIG. 2A is a schematic perspective view of a mounting structure of a cog wheel according to an embodiment of the invention. Fig. 2B is an exploded schematic view of the mounting structure of the cog in Fig. 2A. Fig. 2C is a schematic side view of the mounting structure of the cog in Fig. 2A. FIG. 2D is a schematic cross-sectional perspective view of the mounting structure of the gear plate in FIG. 2A. 2E and 2F are schematic cross-sectional views in FIG. 2C. FIG. 3 is an exploded schematic view of a gear mounting structure of another embodiment of the present invention. 4A is a schematic perspective view of a mounting structure of a cog wheel according to another embodiment of the present invention. 4B is an exploded schematic view of the mounting structure of the cog wheel in FIG. 4A. 4C is a partially enlarged schematic view of the rib portion of the spur mounting structure in FIG. 4B. Fig. 4D is a schematic side view of the mounting structure of the cog in Fig. 4A. 4E is a schematic cross-sectional view taken along
200‧‧‧齒盤安裝結構 200‧‧‧Sprocket installation structure
210‧‧‧曲柄 210‧‧‧Crank
220‧‧‧心軸 220‧‧‧mandrel
221‧‧‧凸緣部 221‧‧‧Flange
2211‧‧‧第一導引槽 2211‧‧‧First guide slot
230‧‧‧偏擺組件 230‧‧‧Swing components
240‧‧‧齒盤 240‧‧‧Sprocket
250‧‧‧固定架 250‧‧‧Fixing frame
251‧‧‧安裝部 251‧‧‧Installation Department
252‧‧‧連接部 252‧‧‧Connecting Department
231‧‧‧第一套筒 231‧‧‧First sleeve
232‧‧‧第二套筒 232‧‧‧Second sleeve
233‧‧‧第三套筒 233‧‧‧The third sleeve
2331‧‧‧樞接部 2331‧‧‧Pivot Department
2311‧‧‧第二導引槽 2311‧‧‧Second guide slot
234‧‧‧中介件 234‧‧‧Intermediary
235‧‧‧滑動件 235‧‧‧slide
234b、235b‧‧‧滾珠 234b, 235b‧‧‧ball
R1‧‧‧第一旋轉軸 R1‧‧‧ First axis of rotation
R2‧‧‧第二旋轉軸 R2‧‧‧second rotation axis
234a‧‧‧組裝環 234a‧‧‧Assembly ring
235a‧‧‧限位環 235a‧‧‧Limit ring
Claims (23)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
TW107129769A TWI682873B (en) | 2018-08-27 | 2018-08-27 | Drivetrain for bicycle and structure of chainring installation thereof |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
TW107129769A TWI682873B (en) | 2018-08-27 | 2018-08-27 | Drivetrain for bicycle and structure of chainring installation thereof |
Publications (2)
Publication Number | Publication Date |
---|---|
TWI682873B true TWI682873B (en) | 2020-01-21 |
TW202009172A TW202009172A (en) | 2020-03-01 |
Family
ID=69942539
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
TW107129769A TWI682873B (en) | 2018-08-27 | 2018-08-27 | Drivetrain for bicycle and structure of chainring installation thereof |
Country Status (1)
Country | Link |
---|---|
TW (1) | TWI682873B (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
TWI760047B (en) * | 2021-01-06 | 2022-04-01 | 傳誠技研有限公司 | Rear hub structure for the belt |
TWI788081B (en) * | 2021-11-02 | 2022-12-21 | 傳誠技研有限公司 | Floating driven mechanism |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5354243A (en) * | 1993-11-09 | 1994-10-11 | Kriek Albert P | Variable ratio chain drive employing synchronous flexible sprocket shifting |
TW314043U (en) * | 1995-04-26 | 1997-08-21 | Falcon Cycle Parts Co Ltd | Multi-shift derailleur sprocket structure for bicycle |
EP1609713A2 (en) * | 2004-06-22 | 2005-12-28 | Shimano Inc. | Shift assist projection for bicycle sprocket |
TW201819242A (en) * | 2016-11-16 | 2018-06-01 | 日商島野股份有限公司 | Bicycle front sprocket, bicycle crank assembly, and bicycle drive train |
-
2018
- 2018-08-27 TW TW107129769A patent/TWI682873B/en not_active IP Right Cessation
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5354243A (en) * | 1993-11-09 | 1994-10-11 | Kriek Albert P | Variable ratio chain drive employing synchronous flexible sprocket shifting |
TW314043U (en) * | 1995-04-26 | 1997-08-21 | Falcon Cycle Parts Co Ltd | Multi-shift derailleur sprocket structure for bicycle |
EP1609713A2 (en) * | 2004-06-22 | 2005-12-28 | Shimano Inc. | Shift assist projection for bicycle sprocket |
TW201819242A (en) * | 2016-11-16 | 2018-06-01 | 日商島野股份有限公司 | Bicycle front sprocket, bicycle crank assembly, and bicycle drive train |
Also Published As
Publication number | Publication date |
---|---|
TW202009172A (en) | 2020-03-01 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
TWI447318B (en) | Sprocket support structure | |
TWI779370B (en) | Bicycle hub assembly | |
TWI682873B (en) | Drivetrain for bicycle and structure of chainring installation thereof | |
TWI749228B (en) | Bicycle sprocket | |
TWI690458B (en) | Bicycle sprocket | |
US7258638B2 (en) | Sprocket of a chain transmission for a bicycle | |
US20170190384A1 (en) | Bicycle hub assembly | |
US8888629B2 (en) | Bicycle sprocket assembly with chain protector | |
CA3025679C (en) | Belt drive system | |
US8820852B2 (en) | Sprocket mounting carrier for a bicycle | |
KR101089683B1 (en) | The bicycle an accelerator | |
KR20190130311A (en) | Hub built-in type constant velocity joint apparatus | |
US10723174B2 (en) | Bicycle free wheel and wheel hub comprising such a free wheel | |
US20190186623A1 (en) | Planetary gear reduction device | |
CN106625602A (en) | Robot | |
US9855795B2 (en) | Clutch assembly | |
US7431405B2 (en) | Bicycle wheel hub cover | |
CN110884607A (en) | Transmission system of bicycle and fluted disc mounting structure thereof | |
US5299925A (en) | Bicycle rear-wheel hub assembly | |
JP6502170B2 (en) | Gap adjusting member, assembling method of gap adjusting member, and transmission | |
TWI788081B (en) | Floating driven mechanism | |
TWI759957B (en) | Combination of chainring and crank assembly | |
KR20160093252A (en) | Accelerating device for a bicycle which can enhance the travelling speed | |
TWI664098B (en) | Wheel | |
TWI808807B (en) | Crank device of bicycle |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
MM4A | Annulment or lapse of patent due to non-payment of fees |