Disclosed is a crank variable-speed gear device (100), wherein the gear ratio can be increased to 1.6:1 to 1.8:1 through a gear assembly and a latch assembly, and the gear ratio can also be changed to 1:1, if necessary, thereby providing an excellent transmission efficiency, facilitating the manipulation thereof, and making it possible to provide a compact and lightweight bicycle. A gear assembly is disposed inside the housing (120) of the crank variable-speed gear device (100) and on one side thereof, and a latch assembly is disposed inside the housing (120) and on the other side thereof. The gear assembly comprises a sun gear (140) having a first latch engaging portion (145) formed on a radial outer surface on one side thereof, planetary gears 150, and a ring gear (160). The latch assembly comprises: a latch body (170) having multiple latch sites (175) formed on a radial inner surface thereof; multiple first latches (118) disposed at the latch sites (175), respectively; a latch ring (180) disposed to be inserted into the latch body (170) and having a second latch engaging member (182) formed on a radial inner surface thereof; a second latch (176) disposed in a second latch insertion groove (147) formed on the radial outer surface of the sun gear (140) such that the upper end thereof engages with the second latch engaging member (182); a latch guide (190) disposed in the latch body (170); a lock ring (200) mounted on the radial outer surface of the latch body (170); and a ring-shaped fastening bracket (220) fixed/mounted on a side surface of the latch body (170).

    本发明公开了一种曲柄可变速齿轮装置(100),其通过齿轮组和闩锁组,将齿轮比加速1.6倍速至1.8倍速,同时根据需要将齿轮比变速为1倍速,因此变速效率优秀、操作简单,且能够实现自行车的小型化及轻量化。在曲柄可变速齿轮装置(100)的壳体(120)内部及其一侧布置齿轮组,在壳体(120)的内部和另一侧布置有闩锁组。所述齿轮组包括:恒星齿轮(140),其在一侧辐射状外面形成第一闩锁挂钩区(145);行星齿轮(150)及环齿轮(160)。所述闩锁组包括:闩锁主体(170),辐射状内面形成多个闩锁点(175);多个第一闩锁(118)分别布置在所述闩锁点(175)上;闩锁环(180),其插入并布置于所述闩锁主体(170)内部,在辐射状内面形成第二闩锁挂钩区(182);第二闩锁(176),其布置于所述恒星齿轮(140)的辐射状外面形成的第二闩锁插入槽(147),且使其上端部挂钩于所述第二闩锁挂钩区(182);闩锁导向件(190),其布置在所述闩锁主体(170)内;锁定环(200),其安装在所述闩锁主体(170)的辐射状外面;及固定支架(220),其为环状,固定并安装在所述闩锁主体(170)的一侧面。


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    Title :

    CRANK VARIABLE-SPEED GEAR DEVICE FOR INCREASING ROTATIONAL POWER


    Additional title:

    一种用于增加旋转力的曲柄可变速齿轮装置


    Contributors:

    Publication date :

    2021-08-06


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Chinese


    Classification :

    IPC:    B62M RIDER PROPULSION OF WHEELED VEHICLES OR SLEDGES , Antrieb von Radfahrzeugen oder Schlitten durch den Fahrer



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