In a frictional propulsion device comprising a main wheel including driven rollers rotatably supported by an annular core member about a tangential direction and a pair of drive disks each carrying a plurality of drive rollers rotatable about a rotational center line at an angle with respect to both a tangential line of the drive disk and the rotational center line of the drive disk such that the drive rollers at least partly engage the driven rollers, a diameter of a drive side contact circle is smaller than a diameter of a driven side contact circle, and the drive disks are vertically offset relative to the main wheel so that only those drive rollers adjoining the main wheel are in contact with the driven rollers.

Disclosed is a single-wheeled balance vehicle. The single-wheeled balance vehicle includes: a wheel provided on a wheel frame, a motor transmission mechanism fixed in the wheel frame and arranged to drive the vehicle according to acquired manned mode information; a wheel cover arranged to partially cover the wheel; a skeleton arranged to reinforce mechanical strength of the wheel cover; and footboards arranged to be stepped on by both feet of a driver in driving. The wheel cover partially covers the wheel and in embodiments may be in a surface contact, so that the contact area is larger, contact stress is more dispersive, a strain is relatively small, the deformation of the wheel cover can be reduced, the possibility that a tire or a hub motor is rubbed or locked due to deformation of the wheel cover in the related art can be avoided, and safety performance can be improved.

A self-balancing load-bearing device having a load platform or like structure that may move relative to the drive wheel or wheels under the force of gravity as the device operates. The load platform may be mounted with a pendulum based structure including curved support tracks or pendulum arms or a related structure. User input of control signals may be achieved with a joystick, foot pedal, remote control or other. Various embodiments and uses are disclosed.

A self-propelled device is disclosed that includes a center of mass drive system. The self-propelled device includes a substantially cylindrical body and wheels, with each wheel having a diameter substantially equivalent to the body. The self-propelled device may further include an internal drive system with a center of mass below a rotational axis of the wheels. Operation and maneuvering of the self-propelled device may be performed via active displacement of the center of mass.

Disclosed are a foot plate for a self-balancing scooter, and a self-balancing scooter. The foot plate (1) for a self-balancing scooter comprises a main body (10) and touch control portions (11). A front side and a rear side of a lower surface of the main body are both connected to the touch control portions, which protrude downwards and are used to trigger a sensor on a self-balancing scooter. The touch control portions at the front side and the rear side of the lower surface of the foot plate for a self-balancing scooter are capable of directly triggering corresponding sensors. The foot plate is applicable to twisting scooters having a left scooter portion and a right scooter portion which are capable of twisting relatively. No additional components are required, and users just need to install the foot plate on a self-balancing scooter. The foot plate has a simple and logic structure, and a self-balancing scooter adopting the foot plate is compact in overall structure, easy to install, convenient to operate, better in control performance, and longer in service life.

The present invention refers to an electric vehicle. As compared with the solution in prior art which is that assembling the finished product of wheel hub motor with the casing, the inventor of present invention creatively dismantles the structure of the original finished product of wheel hub motor with discarding at least one hub cover. Such solution simplifies the structures and reduces the weights of the wheel hub motor and the electric vehicle, moreover, it can reduce the gap between the casing and the wheel hub motor and thus decrease the overall thickness of the electric vehicle, especially decrease the thickness of the electric unicycle for easy to carry.

A pedal connection mechanism includes a left and a right pedal, and a transverse connecting member. The first cylindrical shaft is provided along the bottom of the left pedal. The left side of the top wall of the transverse connecting member is provided with the first support member. The second cylindrical shaft is provided along the bottom of the right pedal. The right side of the top wall of the transverse connecting member is provided with the second support member. The present invention further provides an electric balancing vehicle using this pedal connection mechanism. The left pedal and the right pedal are not connected with each other through an intermediate shaft. Their motion statuses are controlled respectively by the left foot and the right foot independently. The transverse connecting member shares the weight of a human body. The force distributes evenly. The balancing vehicle is flexible and durable.

A pedal connection mechanism, includes a left and a right pedal, and a transverse connecting member. The first cylindrical shaft is provided along the bottom of the left pedal. The left side of the top wall of the transverse connecting member is provided with the first support member. The second cylindrical shaft is provided along the bottom of the right pedal. The right side of the top wall of the transverse connecting member is provided with the second support member. The present invention further provides an electric balancing vehicle using this pedal connection mechanism. The left pedal and the right pedal are not connected with each other through an intermediate shaft. Their motion statuses are controlled respectively by the left foot and the right foot independently. The transverse connecting member shares the weight of a human body. The force distributes evenly. The balancing vehicle is flexible and durable.

Foot placement sensor and self-balancing vehicles having same. The foot placement sensor may be configured in or with a self-balancing transportation device that has a least a first foot platform. The sensor may include an emitter of electromagnetic radiation (or other suitable signal) that is propagated, at least in part, over a portion of the foot platform and a receptor positioned to receive this emission. Interruption of the emitted radiation at the receptor may indicate the presence of a user's foot at the platform. One suitable emission type is infrared light, among other suitable types. Various embodiments are disclosed including in two-wheel, one-wheel and paired-wheel self-balancing vehicles.

In a method for driving stabilization of a motorized two-wheeled vehicle, in which two gyroscopes situated side-by-side are present having axes of rotation in parallel to each other, the gyroscopes each being tiltable about a tilting axis perpendicular to the axis of rotation, and the tilting axes of the two gyroscopes also being parallel to each other, the gyroscopes rotating about their axes of rotation in directions of rotation opposite to each other, and in the case of a detected unstable driving behavior of the two-wheeled vehicle, the two rotating gyroscopes are tilted about their respective tilting axis at a first angular velocity, the tilting directions being counter to each other; and the two gyroscopes are subsequently tilted back again at a second angular velocity about their respective tilting axis into their original orientation.