Speed increasing chain wheel for bicycle

[0026] Such as figure 1 , 2 , as shown in 3,

[0027] The speed-increasing crankset of the bicycle includes the crankset 7, the pinion 5, and the attachment plate 3 of the pinion. On the shaft 1, an internal gear 11 is provided on the protruding outer edge of the hole 10 of the tooth disc, and the internal gear 11 meshes with three pinion gears 5 arranged around it, and the pinion gear 5 is arranged on the attachment disc 3 through the pinion shaft 4 Above, the hole 12 of the attachment plate is fixed on the central shaft 1 .

[0028] The disc of the attachment disc 3 is turned to the crank disc 7, and the section forms an L shape, which extends to protect the internal gear.

[0029] The attachment plate 3 is provided with a conversion controller 6, which can realize the conversion of two modes of extreme speed bicycle and traditional bicycle; the structure of the conversion controller is: the outer end of the connecting rod is provided with a button, and the connecting rod P

[0035] Such as Figure 4 , 5 , shown in 6, the speed-increasing crankset of bicycle comprises the attachment disc 3 of crankset 7, pinion 5, pinion, and the section of crankset 7 is a double L-shaped structure, is the middle hole 10 of the crankset inside, and the middle hole 10 of the crankset The bearing 23 is arranged on the central shaft 1, and the outer edge of the tooth plate hole 10 is provided with an internal gear 11. The internal gear 11 meshes with three pinion gears 5 arranged around it, and the pinion gear 5 passes through the pinion shaft. 4 is set on the attachment plate 3, and the middle hole 12 of the attachment plate is fixed on the central axis 1.

[0036] The side of the middle part of the attachment plate 3 opposite to the tooth plate 7 is provided with a shell 21 , and the shell 21 is directly on the central shaft sleeve 8 . This protects the internal gears.

[0037] The crankset 7 is provided with a switch controller 22, the switch controller 22 is arran