A variable speed drive (37) is described, comprising: a ring (60) adapted to rotate about a first rotation axis; two coaxial disks (73), rigidly connected to each other, adapted to rotate about a second rotation axis (B-B) parallel to the first rotation axis; wherein the ring (60) is at least partially housed between the two coaxial disks (73); a plurality of driving members (75), carried by the ring (60) and arranged according to a circular arrangement coaxial to the ring (60); said driving members are arranged and configured to cooperate with opposite surfaces (73A) of the two coaxial disks (73), transmitting a rotation motion from the ring (60) to the two coaxial disks (73); a device for adjusting the distance between the first rotation axis and the second rotation axis. A drive device (17) of an assisted-pedal human-powered vehicle (10) which includes such a drive is also described.

The present invention relates to a cardan joint steering titanium alloy hand and foot cooperatively operated bicycle capable of being ridden with one leg, which comprises a bicycle front wheel (10), a front wheel fork frame (11), a bicycle rear wheel (20), a frame body (30), a seat cushion assembly (50), a steering handlebar (70), paired chain wheels (80) and a rear wheel fork frame (90). The upper end of a front fork rotating shaft (13) and the lower end of an assisting stem (76) are connected through a cardan joint component (77), symmetric ratchet wheels (21) are provided on the two sides of the bicycle rear wheel (20), the paired chain wheels (80) are fixed to the two sides of a frame middle shaft (88), pedal shaft pins (84) are symmetrically provided on the outer sides of the paired chain wheels (80), and the paired chain wheels (80) and the symmetric ratchet wheels (21) are connected through symmetric chains (23). By additionally providing the cardan joint component (77), the assisting sliding sleeve (60), the assisting swinging rod (46) and the assisting connecting rod (43), the present invention realizes the effect that the two hands participate in acting; by additionally providing the seat transverse swinging rod (45) and the pull rod swinging fork (42), the limit that the positions of two pedals of the conventional bicycle must have a difference of 180 degrees is overcome, the two feet do not need to apply force alternately, and the bicycle can be ridden with one leg.

The present invention relates to a cardan joint steering titanium alloy hand and foot cooperatively operated bicycle capable of being ridden with one leg, which comprises a bicycle front wheel (10), a front wheel fork frame (11), a bicycle rear wheel (20), a frame body (30), a seat cushion assembly (50), a steering handlebar (70), paired chain wheels (80) and a rear wheel fork frame (90). The upper end of a front fork rotating shaft (13) and the lower end of an assisting stem (76) are connected through a cardan joint component (77), symmetric ratchet wheels (21) are provided on the two sides of the bicycle rear wheel (20), the paired chain wheels (80) are fixed to the two sides of a frame middle shaft (88), pedal shaft pins (84) are symmetrically provided on the outer sides of the paired chain wheels (80), and the paired chain wheels (80) and the symmetric ratchet wheels (21) are connected through symmetric chains (23). By additionally providing the cardan joint component (77), the assisting sliding sleeve (60), the assisting swinging rod (46) and the assisting connecting rod (43), the present invention realizes the effect that the two hands participate in acting; by additionally providing the seat transverse swinging rod (45) and the pull rod swinging fork (42), the limit that the positions of two pedals of the conventional bicycle must have a difference of 180 degrees is overcome, the two feet do not need to apply force alternately, and the bicycle can be ridden with one leg.

An electric bike comprises a front wheel, a rear wheel, a seat for a rider to sit on, a frame that supports the front wheel, the rear wheel and the seat, a driving device that provides moving energy to the electric bike and a braking device that reduces the speed of the electric bike. The driving device comprises one or more electric motors. The electric bike further comprises a pedal assembly that receives muscle power from the rider. The pedal assembly comprises a pedal axis and two pedals fixed to the pedal axis. The torque from the pedal assembly is not mechanically transferred to the front wheel or the rear wheel.

An electric bike comprises a front wheel, a rear wheel, a seat for a rider to sit on, a frame that supports the front wheel, the rear wheel and the seat, a driving device that provides moving energy to the electric bike and a braking device that reduces the speed of the electric bike. The driving device comprises one or more electric motors. The electric bike further comprises a pedal assembly that receives muscle power from the rider. The pedal assembly comprises a pedal axis and two pedals fixed to the pedal axis. The torque from the pedal assembly is not mechanically transferred to the front wheel or the rear wheel.

Tri-Power Exercising device allows a rider to simultaneously, or on demand, exercise virtually all muscle groups in his lower and upper body. The device includes a bicycle frame, pedals, forearm bars, sliding seat, computer and electronic display recommending energy modulation amounts from various muscle groups to optimize physical performance on any given trek. Because riders can exercise virtually all muscle groups at once, they reduce their exercising time, continuously builds muscle tissue throughout their whole body, and exercises their cardiovascular and respiratory systems completely. Riders operate the device by rotating legs on the pedals, rotationally oscillating the forearm bars up and down with their arms and shoulders, and then use core muscles to pull and push the seat back and forth on the slider. Inverted racks, pinion gears, and one-way bearings turn this linear power from the oscillating forearm bars and sliding seat into torque that rotates the crank axle.

Tri-Power Exercising device allows a rider to simultaneously, or on demand, exercise virtually all muscle groups in his lower and upper body. The device includes a bicycle frame, pedals, forearm bars, sliding seat, computer and electronic display recommending energy modulation amounts from various muscle groups to optimize physical performance on any given trek. Because riders can exercise virtually all muscle groups at once, they reduce their exercising time, continuously builds muscle tissue throughout their whole body, and exercises their cardiovascular and respiratory systems completely. Riders operate the device by rotating legs on the pedals, rotationally oscillating the forearm bars up and down with their arms and shoulders, and then use core muscles to pull and push the seat back and forth on the slider. Inverted racks, pinion gears, and one-way bearings turn this linear power from the oscillating forearm bars and sliding seat into torque that rotates the crank axle.

A multi-wheel bicycle with a dual universal joint disposed on a bicycle frame, wherein a first end of the universal joint is mounted to the bicycle frame and a second end of the universal joint is mounted on a moveable end of a bicycle steering fork. A front drive chain is couple from the universal joint to a front tire disposed on a free-wheeling front hub, and a second drive chain is coupled from the first end to a drive sprocket. The drive sprocket is further coupled to a free-wheeling hub attached to a front tire. The coupling provides for transfer of rotational power from the drive sprocket to the front and rear tires through the dual universal joint even as the universal is flexed through its range of motion while steering the bicycle.

A multi-wheel bicycle with a dual universal joint disposed on a bicycle frame, wherein a first end of the universal joint is mounted to the bicycle frame and a second end of the universal joint is mounted on a moveable end of a bicycle steering fork. A front drive chain is couple from the universal joint to a front tire disposed on a free-wheeling front hub, and a second drive chain is coupled from the first end to a drive sprocket. The drive sprocket is further coupled to a free-wheeling hub attached to a front tire. The coupling provides for transfer of rotational power from the drive sprocket to the front and rear tires through the dual universal joint even as the universal is flexed through its range of motion while steering the bicycle.

A drive pulley for a CVT has a fixed sheave, a movable sheave, a spider, a biasing member biasing the movable sheave axially away from the fixed sheave, at least one centrifugal actuator and at least one slider assembly. The at least one slider assembly has a slider block connected to one of the movable sheave and the spider and abutting another one of the movable sheave and the spider. The slider block slides along the other one of the movable sheave and the spider as the movable sheave moves axially. The at least one slider assembly transfers torque between the movable sheave and the spider. A slider block for a drive pulley of a CVT is also described.