A cardan joint steering titanium alloy hand and foot cooperatively operated bicycle capable of being ridden with one leg comprises a bicycle front wheel, a front wheel fork frame, a bicycle rear wheel, a frame body, a seat cushion assembly, a steering handlebar, paired chain wheels and a rear wheel fork frame. The upper end of a front fork rotating shaft and the lower end of an assisting stem are connected through a cardan joint component, symmetric ratchet wheels are provided on the two sides of the bicycle rear wheel, the paired chain wheels are fixed to the two sides of a frame middle shaft, pedal shaft pins are symmetrically provided on the outer sides of the paired chain wheels, and the paired chain wheels and the symmetric ratchet wheels are connected through symmetric chains.

The invention relates to a device for energy recovery in bicycles with a mid-mounted motor drive unit and at least one rear wheel, comprising a first component that is connected to an element of the rear wheel hub or the rear wheel, such that a rotation of the rear wheel is transmitted to the first component, regardless of the direction of rotation, an energy-transmission device interacting with the first component, a recuperation element that interacts with the energy-transmission device, and a generator that interacts with the recuperation element to recover the rotational energy of the rotational movement of the rear wheel.

The invention relates to a device for energy recovery in bicycles with a mid-mounted motor drive unit and at least one rear wheel, comprising a first component that is connected to an element of the rear wheel hub or the rear wheel, such that a rotation of the rear wheel is transmitted to the first component, regardless of the direction of rotation, an energy-transmission device interacting with the first component, a recuperation element that interacts with the energy-transmission device, and a generator that interacts with the recuperation element to recover the rotational energy of the rotational movement of the rear wheel.

A vehicle includes a body having a first part and a second part, which is moveably coupled to the first part. The vehicle further includes a pedal assembly having a first component coupled to the first part and a wheel assembly having a second component coupled to the second part. The vehicle further includes an extendable drive shaft having a first member and a second member. The first member is coupled to the first component and the second member is coupled to the second component. The vehicle further includes a locking mechanism having a locking member coupled to the first part and the second part of the body. The locking member, in an unlocked position, unlocks the second part from the first part to allow the second part to move over the first part, which may cause a change in a length of the extendable drive shaft.

A bicycle has a bicycle body, a bicycle component, and a battery. The bicycle body has a frame including a down tube, a component mounting portion, and a seat tube. The bicycle component includes a bicycle drive unit. At least a portion of the bicycle component is arranged inside the frame. The battery is mounted on the bicycle to supply the bicycle component with electrical power. The frame further includes a first open portion that is provided on the component mounting portion and opens toward an upper side of the bicycle. At least a portion of the bicycle drive unit is disposed inside the frame and is exposed through the first open portion.

A bicycle has a bicycle body, a bicycle component, and a battery. The bicycle body has a frame including a down tube, a component mounting portion, and a seat tube. The bicycle component includes a bicycle drive unit. At least a portion of the bicycle component is arranged inside the frame. The battery is mounted on the bicycle to supply the bicycle component with electrical power. The frame further includes a first open portion that is provided on the component mounting portion and opens toward an upper side of the bicycle. At least a portion of the bicycle drive unit is disposed inside the frame and is exposed through the first open portion.

To provide a rear wheel braking device for a motorcycle that can reduce an unsprung mass and the number of pieces of components on the rear wheel side of a shaft drive type motorcycle. In a rear wheel braking device for a motorcycle transmitting a drive force of a power unit of a motorcycle to a rear wheel through a drive shaft that extends in a vehicle longitudinal direction, the drive shaft includes a propeller shaft that is connected to a rear end of an output shaft through a universal joint, the output shaft protruding to the vehicle body rear side from a case member of the power unit. A brake disk is attached to the output shaft, the brake disk being braked by a rear wheel brake caliper. The rear wheel brake caliper is fixed to a bracket that is arranged in the case member, and is disposed on the vehicle body upper side of the brake disk.

To provide a rear wheel braking device for a motorcycle that can reduce an unsprung mass and the number of pieces of components on the rear wheel side of a shaft drive type motorcycle. In a rear wheel braking device for a motorcycle transmitting a drive force of a power unit of a motorcycle to a rear wheel through a drive shaft that extends in a vehicle longitudinal direction, the drive shaft includes a propeller shaft that is connected to a rear end of an output shaft through a universal joint, the output shaft protruding to the vehicle body rear side from a case member of the power unit. A brake disk is attached to the output shaft, the brake disk being braked by a rear wheel brake caliper. The rear wheel brake caliper is fixed to a bracket that is arranged in the case member, and is disposed on the vehicle body upper side of the brake disk.

The power transmission mechanism includes a non-contact power transmission mechanism and a mechanical power transmission mechanism, both of which are provided in parallel on a power unit side or a rear wheel side. The mechanical power transmission mechanism has a crown gear and a pinion that are meshed at the time of low-speed rotation of the engine and are separated at the time of medium-high speed rotation thereof.

Vehicle traction device, mainly for land vehicles, of the type comprising a motor and a transmission wherein the motor preferably has an axial rotation, such as an electric motor, wherein the motor rotation is coplanar and concurrent with the primary shaft of the transmission, and wherein the primary shaft is in turn coaxial to the output shaft, such that the output shaft crosses the primary shaft and extends beyond the ends thereof.