A system and method for a bicycle transmission. Specifically, a bicycle transmission having a housing with a first shaft passing therethrough; a set of two conical gear assemblies in opposing parallel alignment disposed within the housing, each having a plurality of different sized gears arranged in a progressive order. A first conical gear assembly is engaged about the first shaft. A second conical gear assembly engaged about a second shaft parallel to the first shaft, the second shaft structured and arranged to have at least a proximate position and a distal position relative to the first shaft. A drive belt is disposed generally normally about one of the two conical gear assemblies and passing therebetween, the drive belt engaging a gear from the first conical gear assembly with a gear from the second conical gear assembly when the second conical gear assembly is in the proximal position. At least one drive belt mover structured and arranged to move the drive belt along progressive order of gears when the second conical gear assembly is in the distal position. A transfer gear joined to an end of the second shaft. A method of use is provided as well.

A system and method for a bicycle transmission. Specifically, a bicycle transmission having a housing with a first shaft passing therethrough; a set of two conical gear assemblies in opposing parallel alignment disposed within the housing, each having a plurality of different sized gears arranged in a progressive order. A first conical gear assembly is engaged about the first shaft. A second conical gear assembly engaged about a second shaft parallel to the first shaft, the second shaft structured and arranged to have at least a proximate position and a distal position relative to the first shaft. A drive belt is disposed generally normally about one of the two conical gear assemblies and passing therebetween, the drive belt engaging a gear from the first conical gear assembly with a gear from the second conical gear assembly when the second conical gear assembly is in the proximal position. At least one drive belt mover structured and arranged to move the drive belt along progressive order of gears when the second conical gear assembly is in the distal position. A transfer gear joined to an end of the second shaft. A method of use is provided as well.

A cycle crankset, comprising independent cranks articulated around a crank axis and each having a pedal axis, a cam pivotably mounted about the crank axis, and a chainring assembly pivotably mounted about the cam about an axis parallel to the crank axis, the cranks being connected to the chainring assembly via connecting rods, the articulation point between each of the cranks and one of the connecting rods being located on the portion of the crank opposite the pedal axis relative to the crank axis.

Provided is a horse-riding bicycle in which a horse-riding effect is obtained by performing both normal driving and horse-riding driving (swinging driving), a user is allowed to simply switch a driving mode between a normal driving mode and a horse-riding driving mode, and a horse-riding driving structure is improved to have a simple structure so that a reduction in costs is achieved and, further, a switching operation between the normal driving mode and the horse-riding driving mode is smoothly performed.

A cycle crankset, comprising independent cranks articulated around a crank axis and each having a pedal axis, a cam pivotably mounted about the crank axis, and a chainring assembly pivotably mounted about the cam about an axis parallel to the crank axis, the cranks being connected to the chainring assembly via connecting rods, the articulation point between each of the cranks and one of the connecting rods being located on the portion of the crank opposite the pedal axis relative to the crank axis.

The disclosure relates to a continuously variable transmission (CVT) unit. The CVT unit comprises a first drive element that is rotatable about a first axis and a second drive element that is rotatable about a second axis parallel to the first axis, wherein the first drive element and the second drive element are movable relative to each other in a direction transverse to the first and second axis. The CVT unit further comprises first coupling elements provided at a constant first radius from the first axis and at a variable second radius from the second axis, for transferring torque between the first drive element and the second drive element.

Disclosed is a transmission system for a vehicle, particularly for a bicycle. The system comprises an input and an output, and a first transmission and a second transmission between the input and the output, wherein the first transmission and the second transmission are connected in series. The first transmission is selectively operable according to a first transmission ratio or a second transmission ratio, and has a first load-shifting clutch for switching the first transmission from the first transmission ratio to the second transmission ratio and/or vice versa. The second transmission is selectively operable according to a third transmission ratio or a fourth transmission ratio, and has a second load-shifting clutch for switching the second transmission from the third transmission ratio to the fourth transmission ratio and/or vice versa.

A bicycle crankset, which is adapted to connect to a chain, includes a chainring, a spider, and a crankarm. The chainring has teeth on an edge thereof to engage the chain and a chainring axis through a center thereof. The spider has spider arms to detachably connect to the chainring and a connecting bore. The spider has a core axis through a center of the connecting bore, and the core axis is kept a predetermined distance away from the chainring axis to form a deviation. The crankarm has an engaging member to engage the connecting bore of the spider. Tips of the teeth of the chainring move in a noncircular path when the crankarm is exerted to drive the chainring to turned, and the noncircular path is adjustable by shifting a location of the connecting bore which change the deviation.

A bicycle eccentric pulley wheel having a chainring, a bearing, and at least one side cover. The chainring is rotatably mounted on the bearing, and the side cover is fixed to the bearing. The side cover is a hollow disk and includes an annular flange formed in an axial direction. The inner side of the annular flange includes a raised portion facing towards a center. The raised portion includes an eccentric hole, which is offset from the center defined by the side cover.

A bicycle crankset includes a chainring, a spider, and a crankarm. The chainring has a disk member and a plurality of teeth on an edge of the disk member to engage a chain. The spider is connected to the disk member of the chainring, and has a connecting bore and a plurality of recesses on an edge of the connecting bore. The crankarm has a plurality of protrusions to engage the recesses of the spider. The connecting bore is eccentric relative to the chainring, and the crankarm is able to be connected to the chainring in different angles by engaging the protrusions of the crankarm with different of the recesses of the spider to provide various paths of motion of the chainring.