Power dollies can be used for moving moveable objects such as trailers. A power dolly could include a frame, a mount and a plurality of wheel sets. The mount could couple the power dolly to a moveable object. One or more of the plurality of wheels sets could be powered. The plurality of wheels sets could be separated into a primary wheel set and one or more support wheel sets. The wheels of the primary wheel set could extend farther from the frame that the wheels of the support wheel sets.

A self-lifting vehicle features a chassis, a plurality of primary ground wheels, and lifting mechanisms installed in an undercarriage of said vehicle. The lifting mechanisms feature actuators attached to the chassis of the vehicle and one or more ground-engagement units movable downwardly away from said chassis by extension of said one or more actuators to force said one or more ground engagement units downwardly against the ground, thereby elevating the chassis and lifting the primary wheels from the ground. Auxiliary wheels on the ground engagement units enable manoeuvring of the lifted vehicle in a lateral manner for parallel parking purposes, or in a swivelling manner for U-turn purposes. Other applications include flood protection, theft prevent, undercarriage service access, and tire removal.

A self-lifting vehicle features a chassis, a plurality of primary ground wheels, and lifting mechanisms installed in an undercarriage of said vehicle. The lifting mechanisms feature actuators attached to the chassis of the vehicle and one or more ground-engagement units movable downwardly away from said chassis by extension of said one or more actuators to force said one or more ground engagement units downwardly against the ground, thereby elevating the chassis and lifting the primary wheels from the ground. Auxiliary wheels on the ground engagement units enable manoeuvring of the lifted vehicle in a lateral manner for parallel parking purposes, or in a swivelling manner for U-turn purposes. Other applications include flood protection, theft prevent, undercarriage service access, and tire removal.

Power dollies can be used for moving moveable objects such as trailers. A power dolly could include a frame, a mount and a plurality of wheel sets. The mount could couple the power dolly to a moveable object. One or more of the plurality of wheels sets could be powered. The plurality of wheels sets could be separated into a primary wheel set and one or more support wheel sets. The wheels of the primary wheel set could extend farther from the frame that the wheels of the support wheel sets.

Power dollies can be used for moving moveable objects such as trailers. A power dolly could include a frame, a mount and a plurality of wheel sets. The mount could couple the power dolly to a moveable object. One or more of the plurality of wheels sets could be powered. The plurality of wheels sets could be separated into a primary wheel set and one or more support wheel sets. The wheels of the primary wheel set could extend farther from the frame that the wheels of the support wheel sets.

A parking system for a vehicle provides a self-contained vehicle lift with jacks on wheels and mounted on a vehicle frame, wherein the jacks are operable between a retracted position permitting the vehicle to move in a normal fashion, and an extended position effective to raise the entire vehicle off the ground to allow the wheels move the vehicle into the parking position.

A parking system for a vehicle provides a self-contained vehicle lift with jacks on wheels and mounted on a vehicle frame, wherein the jacks are operable between a retracted position permitting the vehicle to move in a normal fashion, and an extended position effective to raise the entire vehicle off the ground to allow the wheels move the vehicle into the parking position.

A moving body including a body, a wheel coupled to the body and configured to rotate relative to the body, and an auxiliary wheel connected to the body and configured to move upwards and downwards. The auxiliary wheel has an area protruding more downwards than the wheel when the auxiliary wheel is moved to a lowermost side.

A moving body including a body, a wheel coupled to the body and configured to rotate relative to the body, and an auxiliary wheel connected to the body and configured to move upwards and downwards. The auxiliary wheel has an area protruding more downwards than the wheel when the auxiliary wheel is moved to a lowermost side.

An electric moving device for vehicles, relating to the trailer area, having a base frame, a travelling mechanism, a steering handle mechanism, a driving mechanism and an electric control assembly. The base frame has a support frame and a connecting frame, and the connecting frame is disposed over the support frame. The travelling mechanism has roller wheels on the support frame, and the driving mechanism has a driver and a clutch system. The driver and clutch system are located on two sides of the support frame separately. The clutch system has an input end connected to the driver in a transmission way and an output end connected to the roller wheels in a transmission way. The steering handle mechanism is rotationally fixed to the base frame so the steering handle mechanism could deflect to the two sides of the travelling direction of the moving device for vehicles.