WO2014117552A1 - 自行车链轮组件 - Google Patents

自行车链轮组件 Download PDF

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Publication number
WO2014117552A1
WO2014117552A1 PCT/CN2013/086323 CN2013086323W WO2014117552A1 WO 2014117552 A1 WO2014117552 A1 WO 2014117552A1 CN 2013086323 W CN2013086323 W CN 2013086323W WO 2014117552 A1 WO2014117552 A1 WO 2014117552A1
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WO
WIPO (PCT)
Prior art keywords
sprocket
pipe fitting
assembly according
bicycle
bicycle sprocket
Prior art date
Application number
PCT/CN2013/086323
Other languages
English (en)
French (fr)
Inventor
贺新星
吴建华
李镜锋
Original Assignee
大行科技(深圳)有限公司
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Filing date
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Application filed by 大行科技(深圳)有限公司 filed Critical 大行科技(深圳)有限公司
Publication of WO2014117552A1 publication Critical patent/WO2014117552A1/zh

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62M—RIDER PROPULSION OF WHEELED VEHICLES OR SLEDGES; POWERED PROPULSION OF SLEDGES OR SINGLE-TRACK CYCLES; TRANSMISSIONS SPECIALLY ADAPTED FOR SUCH VEHICLES
    • B62M9/00—Transmissions characterised by use of an endless chain, belt, or the like
    • B62M9/04—Transmissions characterised by use of an endless chain, belt, or the like of changeable ratio
    • B62M9/06—Transmissions characterised by use of an endless chain, belt, or the like of changeable ratio using a single chain, belt, or the like
    • B62M9/10—Transmissions characterised by use of an endless chain, belt, or the like of changeable ratio using a single chain, belt, or the like involving different-sized wheels, e.g. rear sprocket chain wheels selectively engaged by the chain, belt, or the like
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62M—RIDER PROPULSION OF WHEELED VEHICLES OR SLEDGES; POWERED PROPULSION OF SLEDGES OR SINGLE-TRACK CYCLES; TRANSMISSIONS SPECIALLY ADAPTED FOR SUCH VEHICLES
    • B62M9/00—Transmissions characterised by use of an endless chain, belt, or the like
    • B62M9/04—Transmissions characterised by use of an endless chain, belt, or the like of changeable ratio
    • B62M9/06—Transmissions characterised by use of an endless chain, belt, or the like of changeable ratio using a single chain, belt, or the like
    • B62M9/10—Transmissions characterised by use of an endless chain, belt, or the like of changeable ratio using a single chain, belt, or the like involving different-sized wheels, e.g. rear sprocket chain wheels selectively engaged by the chain, belt, or the like
    • B62M9/12—Transmissions characterised by use of an endless chain, belt, or the like of changeable ratio using a single chain, belt, or the like involving different-sized wheels, e.g. rear sprocket chain wheels selectively engaged by the chain, belt, or the like the chain, belt, or the like being laterally shiftable, e.g. using a rear derailleur
    • B62M9/121—Rear derailleurs

Definitions

  • the utility model relates to a bicycle sprocket assembly constituting a part of a bicycle shifting device. Background technique
  • the bicycle currently includes a frame, front and rear wheels, a foot pedal for rotating one or more front sprockets, a plurality of rear sprockets mounted on the rear wheel, and a connecting front sprockets and a plurality of rear sprockets.
  • One of the chains One of the chains.
  • the shifting of the bicycle is generally achieved by a front derailleur mounted adjacent the front sprocket and a rear derailleur mounted adjacent the rear sprocket by slidably moving the chain to separate rear sprockets.
  • Chinese Patent Publication No. 200610073341. 7 provides a sprocket assembly for a bicycle by separately mounting sprocket wheels of different sizes on two pipe members, and threading the two pipe members through a thread, and providing a transition sprocket at the joint, the structure Complex, many installation procedures, because the sprocket is installed on different pipe fittings, the concentricity of the sprocket is not good enough, which can cause the actual value in the shifting to be different from the theoretical value or the shifting is not smooth, due to the pipe fitting The sprocket drives the rotation of the rear wheel, and the force is large, and the connection between the pipe members is not reliable enough.
  • Utility model content Utility model content
  • the utility model provides a bicycle sprocket assembly with simple structure, convenient installation, good sprocket concentricity, stable shifting speed and low production cost.
  • a bicycle sprocket assembly includes a hollow tubular member and a locking mechanism engaged with one end of the tubular member, the tubular member is provided with a spline, and a plurality of sprockets are supported thereon, and the plurality of sprockets are axially positioned by the locking mechanism, the tubular member
  • the other end is provided with a ratchet, a baffle is arranged between the tubular member and the ratchet, and a first sprocket is disposed on one side of the baffle, and the first sprocket is non-rotatably connected to the tubular member.
  • the pipe member and the ratchet are integrally formed.
  • the pipe member is provided with a sprocket seat on which the first sprocket is mounted, the sprocket seat is provided with a plurality of positioning grooves on the outer circumference, and the inner circumference of the first sprocket is provided with a plurality of convex shapes matching the positioning groove structure.
  • the shapes of the plurality of positioning grooves are different.
  • first sprocket is sleeved on the tubular member, and the inner circumference thereof is provided with a first spline groove that cooperates with a spline on the tubular member. Further, the first sprocket is integrally formed with the pipe member.
  • first sprocket is integrally formed with the baffle and fixed to the pipe member.
  • the plurality of sprockets include a second sprocket having a second spline groove on the inner circumference and a third spline groove on the inner circumference.
  • the third sprocket is a second sprocket having a second spline groove on the inner circumference and a third spline groove on the inner circumference. The third sprocket.
  • the locking mechanism is a connecting structure including a flange and a threaded connecting portion, and the end of the tubular member is provided with a first internal thread that engages with the threaded connecting portion of the connecting structure.
  • the locking mechanism is a lock nut provided with a second internal thread
  • the end of the tubular member is provided with an external thread that engages with the second internal thread of the locking nut.
  • the tube member is mounted on the central shaft by the first ball group and the second ball group.
  • tubular member is mounted on the central shaft via a needle bearing.
  • the sprocket of the utility model is non-rotatably disposed on the pipe member and closely arranged on the pipe member, and the axial positioning and fastening of each sprocket by the baffle plate and the locking mechanism ensure the stability of the installation of each sprocket,
  • the sprocket is installed on the same pipe fitting, which improves the concentricity of each sprocket, makes the bicycle switch smoothly between the sprocket wheels during shifting, and the ratchet and the pipe fitting are integrally formed, which improves the safety of the bicycle sprocket assembly.
  • the first and second ball sets or needle bearings are mounted on the central shaft, and the installation method can reduce the radial dimension of the pipe member, effectively reduce the diameter of the root circle of the smallest gear sleeved on the pipe member, and improve the transmission speed.
  • the bicycle sprocket assembly disclosed in the present invention has a simple structure, a compact assembly, and high strength.
  • Figure 1 is a front elevational view of the first embodiment of the present invention
  • Figure 2 is a cross-sectional view of the A-A section of Figure 1;
  • Figure 3 is an exploded view of the first embodiment of the present invention.
  • Figure 4 is an exploded view of the second embodiment of the present invention.
  • Figure 5 is an exploded view of the third embodiment of the present invention.
  • Figure 6 is an exploded view of the fourth embodiment of the present invention.
  • Figure ⁇ is a partial cross-sectional view of a mounting scheme of the bicycle sprocket assembly of the present invention.
  • Figure 8 is a partial cross-sectional view showing another mounting scheme of the bicycle sprocket assembly of the present invention. detailed description
  • the bicycle sprocket assembly includes a pipe member 1, a ratchet 2 connected to one end of the pipe member 1, and a locking mechanism engaged with the other end of the pipe member 1, between the pipe member 1 and the ratchet 2
  • a baffle 3 is provided.
  • the tubular member 1 has a hollow cylindrical shape, and the outer peripheral surface thereof is provided with splines 6, and the tubular member 1 supports a plurality of sprockets, including a second sprocket 9 and a third sprocket 10.
  • the second sprocket 9 is a hollow structure, and the inner surface thereof is provided with the spline 6
  • the second spline groove includes a second sprocket portion 91 and a second tubular connecting portion 92 extending from a side wall of the second sprocket portion 91.
  • the second sprocket portion 91 is provided with a groove 93 on the other side.
  • the second sprocket 9 is mounted on the tubular member 1, and the second spline groove on the second sprocket 9 is engaged with the spline 6 of the outer peripheral surface of the tubular member 1, and the second sprocket 9 is non-rotatably mounted on the tubular member 1.
  • the third sprocket 10 has a hollow structure, and an inner surface thereof is provided with a third spline groove that cooperates with the spline 6, and includes a third sprocket portion 101 and a third sprocket portion 101 extending from the side wall.
  • a third tubular connecting portion 102 the third tubular connecting portion 102 being received in the recess 93 of the second sprocket 9, not only making the second sprocket 9 and the third sprocket 10 compact in the axial direction, but also Conducive to the overlapping positioning of the two.
  • the sprocket seat 7 is disposed on one side of the baffle 3, and a plurality of locating slots are formed on the outer circumference of the sprocket seat 7. The shape of each locating slot is different.
  • a sprocket 8 is mounted on the sprocket seat 7.
  • the first sprocket 8 has a hollow structure, and the outer surface thereof is provided with a first sprocket portion 81, and the inner surface is provided with a positioning groove on the sprocket seat 7.
  • the first sprocket 8 is non-rotatably mounted on the sprocket seat 7, and one side of the first sprocket 8 is provided with a stepped groove 83, and the stepped groove 83 accommodates the second sprocket 9
  • the second tubular connecting portion 92, the first sprocket 8 is axially positioned by the second tubular connecting portion 92 of the second sprocket 9 and the baffle 3.
  • the locking mechanism is a connecting structure 4 including a flange 41 and a threaded connecting portion 42.
  • One end of the tubular member 1 is provided with a first internal thread, and the first internal thread is engaged with the threaded connecting portion 42 of the connecting structure 4,
  • the flange 41 of the connecting structure 4 presses the side of the third sprocket 10 so that the third sprocket 10, the second sprocket 9 and the first sprocket 8 are axially fixed.
  • the first sprocket 8, the second sprocket 9 and the third sprocket 10 are stably installed and have high coaxiality, which improves the safety and convenience of the use of the bicycle sprocket assembly, and is advantageous for reducing the production cost of the bicycle sprocket assembly.
  • Embodiment 2 As shown in FIG. 4 , the difference between this embodiment and the first embodiment is that the sprocket seat is not provided in the embodiment, and the first sprocket 8 is integrally formed with the pipe member 1 , which not only has higher strength but also is manufactured more. Convenient, low processing costs.
  • Embodiment 3 As shown in FIG. 5, the difference between this embodiment and the first embodiment is that the sprocket seat is not provided in the embodiment, and the first sprocket 8 and the baffle plate 3 are integrally formed, and the strength is higher and the manufacturing is convenient.
  • Embodiment 4 as shown in FIG. 6, the difference between this embodiment and the first embodiment is that, in this embodiment, there is no sprocket seat, and the inner surface of the first sprocket 8 is provided with a spline fitting with the pipe member 1. a splined groove, but without a protruding structure, the first sprocket 8 is non-rotatably mounted on the pipe member 1 through the first spline groove, one end of the pipe member 1 is provided with an external thread, and the locking mechanism is provided with a second inner portion
  • the threaded lock nut 5, the first sprocket 8, the second sprocket 9 and the third sprocket 10 are axially fixed on the pipe member 1 by means of a lock nut 5. Since the lock nut is a standard part, its production process and method are very mature, the production cost is low, and the price is low. Therefore, the use of the lock nut 5 as the locking mechanism is lower than other non-standard parts.
  • Figure 7 is a partial cross-sectional view showing the bicycle sprocket assembly mounted on the center shaft 11, the inner surface of the pipe member 1 is provided with a convex wall 100, The first ball group 12 and the second ball group 13 are disposed on both sides of the convex wall 100, and the first ball group 12 and the second ball group 13 are disposed between the tube member 1 and the middle shaft 11, the first ball
  • the balls in the group 12 and the second ball group 13 are respectively arranged in a ring shape, and one end of the center shaft 11 is provided with a shoulder 110, and the other end of the center shaft 11 is connected with a positioning screw 14, and the first ball group 12 passes through the convex wall 100 and
  • the positioning screw 14 is axially restrained, and the second ball group 13 is axially restrained by the shoulder 110 and the convex wall 100, so that the first ball group 11 and the second ball group 13 arranged in a ring shape have the function of bearings.
  • the first ball set 12 and the second ball set 13 used in the present embodiment replace the conventional bearing, thereby reducing the radial dimension of the pipe member 1 and arranging on the pipe member.
  • the minimum gear diameter of the smallest gear can be controlled to be smaller, which can greatly increase the transmission speed ratio, and is also very important for the lightweight of the bicycle.
  • Figure 8 is a partial cross-sectional view showing another embodiment of the bicycle sprocket assembly mounted on the center shaft 11.
  • the inside of the pipe member 1 is provided with a needle bearing 15, which includes a needle bearing outer cymbal 151 and is embedded outside the needle bearing
  • the needle 152 is arranged circumferentially in the crucible 151, and the needle roller 152 is rotatable on the center shaft 11, thereby functioning as a conventional bearing.
  • the needle bearing 15 can reduce the tubular member 1 because it has no inner bore. Radial size.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Gears, Cams (AREA)

Abstract

一种自行车链轮组件，包括中空的管件（1）和与管件一端啮合的锁紧机构，管件设有花键（6），其上支撑若干链轮，若干链轮通过锁紧机构轴向定位。管件的另一端设有棘轮（2），管件和棘轮之间设有挡板（3）。挡板一侧设有第一链轮（8），第一链轮不可旋转地连接于管件上。该自行车链轮组件具有结构简单、安装方便、链轮同心度好、变速稳定、生产成本低等优点。

Description

自行车链轮组件
技术领域
本实用新型涉及构成自行车变速装置一部分的自行车链轮组件。 背景技术
目前自行车包括车架、 前后轮、 用来旋转一个或多个前链轮的脚踏板、 多个安装在后 轮上的后链轮、 还有一个连接前链轮和多个后链轮中的一个的链条。 一般通过安装在前链 轮附近的前变速器和安装在后链轮附近的后变速器共同作用通过拨动链条， 使其分别连接 在不同的后链轮上来实现自行车的变速。
中国专利文献 200610073341. 7 提供一种自行车的链轮组件， 通过将不同大小的链轮 分别安装在两个管件上， 并将两个管件通过螺紋啮合， 并且在连接处设置一过渡链轮， 结 构复杂， 安装程序多， 由于是将链轮分别安装在不同的管件上， 链轮的同心度不够好， 从 而可以导致变速中的实际值与理论值有差异或者变速时不顺畅， 由于管件上的链轮带动后 轮的转动， 作用力大， 管件之间的该种连接方式不够可靠。 实用新型内容
本实用新型针对上述问题提供一种结构简单， 安装方便， 链轮同心度好， 变速稳定， 生产成本低的自行车链轮组件。
本实用新型的技术方案是：
一种自行车链轮组件， 包括中空的管件和与管件一端啮合的锁紧机构， 所述管件设有 花键， 其上支撑若干链轮， 所述若干链轮通过锁紧机构轴向定位， 管件的另一端设有棘轮， 所述的管件和棘轮之间设有挡板， 所述挡板一侧设有第一链轮， 所述第一链轮不可旋转地 连接于管件上。
作为上述方案的改进， 所述的管件和棘轮一体成型。
进一步， 所述管件上设有安装第一链轮的链轮座， 所述链轮座外周设有若干定位槽， 所述第一链轮内周设有若干与所述定位槽配合的凸状结构。
进一步， 所述若干定位槽的形状各不相同。
进一步，所述第一链轮套设在管件上，其内周设有与管件上的花键配合的第一花键槽。 进一步， 所述的第一链轮与管件一体成型。
进一步， 所述的第一链轮与挡板一体成型， 并固定于管件上。
进一步， 所述的若干链轮包括内周设有第二花键槽的第二链轮和内周设有第三花键槽 的第三链轮。
进一步， 所述的锁紧机构为包括凸缘和螺紋连接部的连接结构， 所述管件端部设有与 所述连接结构的螺紋连接部啮合的第一内螺紋。
进一步， 所述的锁紧机构为设有第二内螺紋的锁紧螺母， 所述管件端部设有与锁紧螺 母的第二内螺紋啮合的外螺紋。
进一步， 所述的管件通过第一滚珠组和第二滚珠组安装在中轴上。
进一步， 所述的管件通过滚针轴承安装在中轴上。
本实用新型各链轮不可旋转的设置于管件上， 并在管件上紧密排列， 通过挡板和锁紧 机构对各链轮的轴向定位和紧固，保证各链轮安装的稳定性，各链轮均安装在同一管件上， 提高了各链轮的同心度， 使自行车在变速时链条在各链轮间切换更顺畅， 棘轮和管件一体 成型， 提高了自行车链轮组件的安全性， 管件通过第一、 第二滚珠组或者滚针轴承安装在 中轴上， 该安装方式可减小管件的径向尺寸， 有效减小套设在管件上的最小齿轮的齿根圆 直径， 提高传动速比， 对于自行车的轻量化具有非常重要的意义， 本实用新型公开的自行 车链轮组件结构简单、 装配紧凑， 强度高。 附图说明
图 1是本实用新型实施例一的主视图；
图 2是图 1中 A-A截面的剖视图；
图 3是本实用新型实施例一的爆炸视图；
图 4是本实用新型实施例二的爆炸视图；
图 5是本实用新型实施例三的爆炸视图；
图 6是本实用新型实施例四的爆炸视图；
图 Ί是本实用新型自行车链轮组件一种安装方案的局部剖视图；
图 8是本实用新型自行车链轮组件另一种安装方案的局部剖视图。 具体实施方式
下面结合附图对本实用新型做进一步说明。
实施例一， 如图 1-3所示， 自行车链轮组件包括管件 1、 连接于管件 1一端的棘轮 2 和与管件 1另一端啮合的锁紧机构， 所述的管件 1和棘轮 2之间设有挡板 3。
所述管件 1呈中空的圆柱状， 其外周表面设有花键 6， 管件 1支撑若干链轮， 包括第 二链轮 9、 第三链轮 10。 所述的第二链轮 9为中空结构， 其内表面设有与所述花键 6配合 的第二花键槽， 包括第二链齿部分 91和从第二链齿部分 91的一侧壁延伸出的第二管状连 接部分 92 , 第二链齿部分 91另一侧设有凹槽 93 , 第二链轮 9安装于管件 1上， 第二链轮 9上的第二花键槽和管件 1外周表面的花键 6配合， 第二链轮 9不可旋转地安装于管件 1 上。 所述第三链轮 10为中空结构， 其内表面设有与所述花键 6配合的第三花键槽， 包括 第三链齿部分 101和从第三链齿部分 101—侧壁延伸出的第三管状连接部分 102 , 所述第 三管状连接部分 102容置于第二链轮 9的凹槽 93中， 不仅使第二链轮 9和第三链轮 10在 轴向结构紧凑， 还有利于两者的叠置定位。
所述管件 1上设有链轮座 7 , 所述链轮座 7设于挡板 3的一侧， 链轮座 7外周设有若 干定位槽， 所述各定位槽的形状各不相同， 第一链轮 8安装于链轮座 7上， 所述第一链轮 8为中空结构， 其外表面设有第一链齿部分 81 , 内表面设有与所述链轮座 7上的定位槽配 合的若干凸状结构 82 , 第一链轮 8不可旋转地安装于链轮座 7上， 第一链轮 8的一侧设有 阶梯槽 83 , 所述阶梯槽 83容置第二链轮 9的第二管状连接部分 92 , 第一链轮 8通过第二 链轮 9的第二管状连接部分 92和挡板 3在轴向定位。
所述锁紧机构为包括凸缘 41和螺紋连接部 42的连接结构 4 , 管件 1的一端设有第一 内螺紋， 所述第一内螺紋与连接结构 4的螺紋连接部 42啮合， 所述连接结构 4的凸缘 41 压紧第三链轮 10的侧部， 从而使所述第三链轮 10、 第二链轮 9和第一链轮 8轴向固定。 第一链轮 8、 第二链轮 9和第三链轮 10安装稳定， 同轴度高， 提高了自行车链轮组件使用 的安全性和便利性， 有利于降低自行车链轮组件的生产成本。
实施例二， 如图 4所示， 该实施例与实施例一的区别在于， 本实施例无链轮座， 第一 链轮 8与所述管件 1一体成型， 不仅强度更高， 且制造更方便， 加工成本低。
实施例三， 如图 5所示， 该实施例与实施例一的区别在于， 本实施例无链轮座， 第一 链轮 8与挡板 3—体成型， 强度更高， 制造方便。
实施例四， 如图 6所示， 本实施例与实施例一的区别在于， 本实施例中无链轮座， 第 一链轮 8内表面设有与所述管件 1的花键配合的第一花键槽， 但无突状结构， 则第一链轮 8通过第一花键槽不可旋转地安装于管件 1上， 管件 1的一端设有外螺紋， 所述锁紧机构 为设有第二内螺紋的锁紧螺母 5 , 第一链轮 8、 第二链轮 9和第三链轮 10通过锁紧螺母 5 在管件 1 上轴向固定。 由于锁紧螺母为标准件， 其生产工艺、 方法等已经非常成熟， 生 产成本低， 价格便宜， 因此使用锁紧螺母 5作为锁紧机构比其他的非标准件的生产成本更 低。
图 7为自行车链轮组件安装在中轴 11上的局部剖视图， 管件 1内表面设有凸壁 100 , 所述凸壁 100两侧设有第一滚珠组 12和第二滚珠组 1 3 ,所述第一滚珠组 12和第二滚珠组 1 3设于管件 1和中轴 11之间，第一滚珠组 12和第二滚珠组 1 3中的滚珠分别成环形排列， 中轴 11一端设有轴肩 110 , 中轴 11的另一端连接定位螺丝 14 , 所述第一滚珠组 12通过 凸壁 100和定位螺丝 14进行轴向限位， 第二滚珠组 1 3通过轴肩 110和凸壁 100进行轴向 限位， 使成环形排列的第一滚珠组 11和第二滚珠组 1 3具有轴承的作用， 由于传统轴承具 有内、 外圏， 本方案中釆用的第一滚珠组 12和第二滚珠组 1 3替代传统的轴承， 从而可减 小了管件 1的径向尺寸， 套设在管件上的最小齿轮的齿根圆直径可控制的更小， 可大幅提 高传动速比， 对于自行车的轻量化也具有非常重要的意义。
图 8为自行车链轮组件安装在中轴 11上另一种实施方案的局部剖视图， 管件 1 内侧 设有滚针轴承 15 , 滚针轴承 15包括滚针轴承外圏 151和镶嵌在滚针轴承外圏 151中呈圆 周排列的滚针 152 , 滚针 152可在中轴 11上转动， 从而起到传统轴承的作用， 相较传统轴 承， 滚针轴承 15由于没有内圏， 可减小管件 1的径向尺寸。

Claims

权利要求
1、 自行车链轮组件， 包括中空的管件（1)和与管件（1)一端啮合的锁紧机构， 所述管 件（1)设有花键（6) , 其上支撑若干链轮， 所述若干链轮通过锁紧机构轴向定位， 其特征在 于， 管件（1)的另一端设有棘轮 (2) , 所述的管件（1)和棘轮 (2)之间设有挡板（3) , 所述挡 板（3)—侧设有第一链轮 (8) , 所述第一链轮 (8)不可旋转地连接于管件（1)上。
2、 根据权利要求 1 所述的自行车链轮组件， 其特征在于， 所述的管件（1)和棘轮（2) 一体成型。
3、 根据权利要求 2所述的自行车链轮组件， 其特征在于， 所述管件（1)上设有安装第 一链轮 (8)的链轮座 (7) , 所述链轮座 (7)外周设有若干定位槽， 所述第一链轮 (8)内周设有 若干与所述定位槽配合的凸状结构。
4、 根据权利要求 3 所述的自行车链轮组件， 其特征在于， 所述若干定位槽的形状各 不相同。
5、 根据权利要求 2所述的自行车链轮组件， 其特征在于， 所述第一链轮（8)套设在管 件（1)上， 其内周设有与管件（1)上的花键 (6)配合的第一花键槽。
6、 根据权利要求 2所述的自行车链轮组件， 其特征在于， 所述的第一链轮（8)与管件 (1)一体成型。
7、 根据权利要求 2所述的自行车链轮组件， 其特征在于， 所述的第一链轮（8)与挡板 (3)—体成型， 并固定于管件（1)上。
8、 根据权利要求 2 所述的自行车链轮组件， 其特征在于， 所述的若干链轮包括内周 设有第二花键槽的第二链轮和内周设有第三花键槽的第三链轮。
9、 根据权利要求 1-8 任一项所述的自行车链轮组件， 其特征在于， 所述的锁紧机构 为包括凸缘（41)和螺紋连接部 (42)的连接结构， 所述管件（1)端部设有与所述连接结构的 螺紋连接部 (42)啮合的第一内螺紋。
10、 根据权利要求 1-8任一项所述的自行车链轮组件， 其特征在于， 所述的锁紧机构 为设有第二内螺紋（51)的锁紧螺母（5) , 所述管件（1)端部设有与锁紧螺母的第二内螺紋 (51)啮合的外螺紋。
11、 根据权利要求 1-8 任一项所述的自行车链轮组件， 其特征在于， 所述的管件（1) 通过第一滚珠组和第二滚珠组安装在中轴上。
12、 根据权利要求 1-8 任一项所述的自行车链轮组件， 其特征在于， 所述的管件（1) 通过滚针轴承安装在中轴上。
PCT/CN2013/086323 2013-01-30 2013-10-31 自行车链轮组件 WO2014117552A1 (zh)

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