A manually operated propelling method for skateboard or longboard skating comprising of an attachable foot pedal mechanism. The mechanism translates linear motion from the user to rotational motion at the wheel of the skateboard. This mechanism allows the rider to propel the skateboard forward without having to remove a foot from the skateboard deck. This is achieved by pushing a spring loaded pedal mounted on the board, which moves a bracket containing a unidirectional ratchet styled gear, which then drives a driving gear that is clamped to the one of the skateboard trucks, which in turn interacts with a driven gear attached to one or more wheels of the skateboard.

A quick-release truck system includes a deck plate, a truck plate, and a locking mechanism for releasably locking the truck plate to the deck plate. The deck plate mounts to an underside of a deck of a rideable vehicle, and the truck plate mounts to, or is integrated into, an upper surface of a truck baseplate. The deck plate and the truck plate slidingly engage one another using vertically-staggered complementary coupling means. The coupling means may further be horizontally-staggered to create a tiered configuration. The coupling means include a combination of rails and grooves. Once fully engaged, the truck plate releasably locks to the deck plate. The deck plate and the truck plate may include cut-outs for weight reduction.

The embodiments of the present disclosure provide roller-skating device and electric balance vehicle, including: footboard, one or more ground contacting elements, first sensor, one or more driving elements and first controller. Footboard is coupled to first sensor and ground contacting elements which are coupled to driving element, and first controller is coupled to first sensor and driving element. Footboard is configured to stand on one foot, and to tile forwards or backwards in the case of one foot standing; one or more ground contacting elements are configured to act due to actuation of driving element; first sensor is configured to sense posture of driver on footboard; one or more driving elements are configured to generate output signal for controlling action of ground contacting elements and maintaining entire roller-skating device in balance; and first controller is configured to control generation of output signal depending on posture.

A skateboard or longboard truck having configured to couple with a deck of the skateboard or longboard. The truck including a base and a hanger. The hanger disposed within a hanger aperture of the base. The hanger rotatably coupled with the base by a pivot assembly. The rotation of the hanger with respect to the base controlled by a compression assembly.

A bottom structure of a roller skate includes a sole; a frame secured to the sole and including front and rear supports and two hubs disposed on the front and rear supports respectively; a pivotal member disposed in the hub; two spaced sleeves disposed in the hub wherein the sleeves are further partially disposed in the pivotal member and secured to the pivotal member; a shaft passing through the hub, the pivotal member, and a gap between the sleeves, and rigidly secured to the pivotal member; and two enlargements disposed at two ends of the shaft respectively.

A bottom structure of a roller skate includes a sole; a frame secured to the sole and including front and rear supports and two hubs disposed on the front and rear supports respectively; a pivotal member disposed in the hub; two spaced sleeves disposed in the hub wherein the sleeves are further partially disposed in the pivotal member and secured to the pivotal member; a shaft passing through the hub, the pivotal member, and a gap between the sleeves, and rigidly secured to the pivotal member; and two enlargements disposed at two ends of the shaft respectively.

A drive module for a skateboard, the drive module comprising at least one axle with at least one wheel which is or can be driven by an electric motor, and a frame, which is connected to the axle and has a receiving space for an energy storage unit, in particular for a secondary battery, the drive module being replaceably connectible to the skateboard. Also, a set and a skateboard comprising the drive module.

A drive module for a skateboard, the drive module comprising at least one axle with at least one wheel which is or can be driven by an electric motor, and a frame, which is connected to the axle and has a receiving space for an energy storage unit, in particular for a secondary battery, the drive module being replaceably connectible to the skateboard. Also, a set and a skateboard comprising the drive module.

A wheel truck assembly having two wheel trucks spaced apart on a base plate for supporting the skater's foot, wherein one wheel truck can be selectively removed from the base plate, and wherein each wheel truck has a two wheels that can be selectively and separately attached to and detached from the wheel truck.

A wheel truck assembly having two wheel trucks spaced apart on a base plate for supporting the skater's foot, wherein one wheel truck can be selectively removed from the base plate, and wherein each wheel truck has a two wheels that can be selectively and separately attached to and detached from the wheel truck.