A pram with a frame, which has a pusher and wheels for driving the pram, a drive, which is drive-connected to at least one of the wheels, and a braking device for at least one wheel, which is transferable into a driving state with free wheel rotation and into a braked state with at least one braked wheel, wherein the drive can be actuated for an automatic rocking function of the pram, wherein the wheel braked by the braking device is rotatable to a limited extent in both wheel circumferential directions in the braked state for automatic rocking of the pram.

An electric handcart, comprising: a main body (1), a power supply device (9) mounted on the main body (1), a power device, and a control device. The power supply device (9) and the control device are separately connected to the power device.

An adjustable displaced differential (ADD) drive unit is disclosed. The ADD drive unit includes a first drive wheel connected to a first pivot and having a vertical axis that is offset laterally from the first wheel traction point. The ADD drive unit includes a second drive wheel connected to a second pivot having a vertical axis that is offset laterally from the second wheel traction point. The ADD drive unit includes differential steering, where if the speed of rotation of the first drive wheel is different to the speed of rotation of the second drive wheel, steering results. The ADD drive unit includes an adjustable steering assembly that can adjust the orientation of the first drive wheel as compared to the second drive wheel to provide additional driving modalities including Ackermann steering, steerable lateral travel and steerable rotation about a chosen vertical axis, such as the center of the machine.

An adjustable displaced differential (ADD) drive unit is disclosed. The ADD drive unit includes a first drive wheel connected to a first pivot and having a vertical axis that is offset laterally from the first wheel traction point. The ADD drive unit includes a second drive wheel connected to a second pivot having a vertical axis that is offset laterally from the second wheel traction point. The ADD drive unit includes differential steering, where if the speed of rotation of the first drive wheel is different to the speed of rotation of the second drive wheel, steering results. The ADD drive unit includes an adjustable steering assembly that can adjust the orientation of the first drive wheel as compared to the second drive wheel to provide additional driving modalities including Ackermann steering, steerable lateral travel and steerable rotation about a chosen vertical axis, such as the center of the machine.

A drive wheel in which the rotational axial center of a wheel along the vertical direction intersecting the axial center of the axle is arranged shifted in the horizontal direction orthogonal to the axial center of the axle with respect to the axial center of the pivot shaft. When a radius R1 of the wheel, center distance R2 between the rotational axial center and the axial center of the pivot shaft, rotational frequency n1 of the wheel, rotational frequency n2 of the pivot shaft, rotational speed V1 of the wheel, and steering rotational speed V2 of the wheel rolling on a floor surface while turning the pivot shaft satisfy V1=V2, relations of V1=2R1n1, V2=2R2n2, and n1=n2 (R2/R1) are satisfied.

A smart dolly includes a running mechanism and a body, the running mechanism comprises an equipment box and a rear axle housing, the equipment box is disposed on the rear axle housing, a battery, electric motor and control computer are provided in the equipment box, the battery and the electric motor are both electrically connected to the control computer, the equipment box has a charging plug thereon, the charging plug is electrically connected to the battery, the rear axle housing is provided with a differential clutch and an axle therein, the differential clutch and the axle form a transmission, the differential clutch is driven by the electric motor, the electric motor is provided with an electromagnetic braking device and a heat dissipation fan, and the external ends of the axle are connected to wheels; the body comprises an upper, middle and lower support rods.

A smart dolly includes a running mechanism and a body, the running mechanism comprises an equipment box and a rear axle housing, the equipment box is disposed on the rear axle housing, a battery, electric motor and control computer are provided in the equipment box, the battery and the electric motor are both electrically connected to the control computer, the equipment box has a charging plug thereon, the charging plug is electrically connected to the battery, the rear axle housing is provided with a differential clutch and an axle therein, the differential clutch and the axle form a transmission, the differential clutch is driven by the electric motor, the electric motor is provided with an electromagnetic braking device and a heat dissipation fan, and the external ends of the axle are connected to wheels; the body comprises an upper, middle and lower support rods.

A motorized cart for transporting game animals includes a cart body. The cart body has a support assembly generally horizontal to support a game animal and a handle assembly extending upwardly at an angle from the support assembly. The motorized cart includes a restraining system to securely hold the game animal to the support assembly. The motorized cart further includes wheels disposed on the cart body and supporting the cart body above the ground, a motor connected to at least one of the wheels, and a battery connected to the motor to supply electrical energy to the motor. The motorized cart further includes a control switch attached to the handle assembly and electrically connected to the battery and the motor to control the flow of electrical energy from the battery to the motor.

Disclosed is a dual-purpose handling truck, which can be electrically controlled to walk or manually pushed and pulled to walk, and has two walking modes. A dual-purpose handling truck includes a front frame; a driving assembly and a lifting assembly are connected below and above the rear frame plate, respectively; the driving assembly includes a walking mechanism and a power mechanism for driving same; the walking mechanism includes a driving frame, on which a driving wheel is installed; the power mechanism controls a gear box to drive the driving wheel to rotate, so that the handling truck is electrically controlled to walk; the gear box is provided with a separation mechanism, which makes gears lose transfer torque and enables the driving wheel to rotate freely, so that the handling truck is manually pushed and pulled to walk; and the lifting assembly realizes the lifting of the handling truck.

A weight-bearing device includes a single wheel, a frame attached to the wheel, and an electric motor attached to the frame. The electric motor is configured to rotate a first gear, connected to a second gear with a chain. The second gear is connected to the wheel. The second gear and the first gear may have a gear ratio of greater than 8:1.