A tricycle includes a frame, a chair, a handle, a front wheel, two pedals, two wheel-supporting units, two rear wheels and a connector. The frame includes a longitudinal tube, a fork connected to the longitudinal tube, and a transverse tube connected to the longitudinal tube. The chair is supported on the longitudinal tube. The handle is pivotally supported on the longitudinal tube in front of the chair. The front wheel is connected to the fork. The pedals are connected to the front wheel. Each of the wheel-supporting units includes a threaded shaft inserted through the transverse tube and engaged with a nut and an axle inserted through a corresponding one of the rear wheels. The threaded shaft comprises an axis that does not intersect the axle. The connector connects the handle to one of the wheel-supporting units.

A support frame assembly mounted to a narrow track vehicle to enhance stability during turns is provided. The support frame assembly includes a pivot frame assembly coupled to the narrow track vehicle and having a horizontal beam connected to a vertical beam, the horizontal beam supporting the seat of the narrow track vehicle thereon, a fixed frame assembly coupled to the narrow track vehicle and having a horizontal beam pivotably mounted to the vertical beam of the pivot frame assembly, and a pair of struts coupled to the pivot frame assembly and fixed frame assembly. The pair of struts apply counteracting forces on the vertical beam of the pivot frame assembly in response to pivotal movement of the pivot frame assembly relative to the fixed frame assembly.

A personal mobility apparatus includes: a support platform having a pair of footplates and a cavity; two drive wheels disposed on both sides of the support platform, respectively; and a steering wheel connected to the support platform to be received in the cavity. The steering wheel is connected through a telescopic tube to be received in the cavity of the support platform and the telescopic tube includes a first tube and a second tube moving telescopically with respect to the first tube.

Some embodiments are directed to a foldable vehicle for use as a vehicle if being unfolded, and for use as a trolley if being folded. The vehicle in its folded configuration may also be placed in an upright parking position. The vehicle includes a first side frame coupled to a first wheel, a second side frame coupled to a second wheel and a coupling frame. The coupling frame includes a hinge joint between a first end and a second end of the coupling frame. The first end is hinged to the first side frame and the second end is hinged to the second side frame. When the first wheel translates towards the second wheel, the hinge joint moves from one side of the second wheel to the other side of the second wheel.

A set of elements giving the possibility of forming two types of wheeled devices for children which comprises: a platform (10), a handle (3) comprising an upright (20) intended to be connected to the front of the platform (10), and a removable seat (6); said handle (3) is removable with respect to the platform (10), and the platform (10) comprises, on the side of the front wheel(s) (11), a well (13) for receiving the lower portion of the upright (20); the platform (10) comprises a front boss (14) and said well (13) opens at the upper portion of this boss (14); the set of elements comprises a body (4) for supporting the seat (6), the front portion (4a) of which has a front extension (22) and a rear extension (23) defining together a housing (24) having a recessed shape corresponding to the shape of the boss (14); the set of elements comprises means (28, 31) for mounting the seat (6) on said supporting body (4), and the set of elements comprises means (5) for attaching at least one of said extensions (22, 23) to the platform (10).

A set of elements giving the possibility of forming two types of wheeled devices for children which comprises: a platform (10), a handle (3) comprising an upright (20) intended to be connected to the front of the platform (10), and a removable seat (6); said handle (3) is removable with respect to the platform (10), and the platform (10) comprises, on the side of the front wheel(s) (11), a well (13) for receiving the lower portion of the upright (20); the platform (10) comprises a front boss (14) and said well (13) opens at the upper portion of this boss (14); the set of elements comprises a body (4) for supporting the seat (6), the front portion (4a) of which has a front extension (22) and a rear extension (23) defining together a housing (24) having a recessed shape corresponding to the shape of the boss (14); the set of elements comprises means (28, 31) for mounting the seat (6) on said supporting body (4), and the set of elements comprises means (5) for attaching at least one of said extensions (22, 23) to the platform (10).

A frame of a vehicle includes a front fork unit pivotably connected to a head tube of a vehicle body mechanism, a crank axle disposed on the front fork unit for two front-wheel cranks to be pivoted thereon. Two front wheels are pivotably disposed on the cranks, respectively. A front-wheel counteracting mechanism is pivotably connected between each of the cranks and the front fork unit to transmit an impact force to the cranks so as to cause opposite upward and downward movements of the front wheels to thereby keep the front wheels in contact with the ground and to render movement of the vehicle steady and safe.

A frame of a vehicle includes a front fork unit pivotably connected to a head tube of a vehicle body mechanism, a crank axle disposed on the front fork unit for two front-wheel cranks to be pivoted thereon. Two front wheels are pivotably disposed on the cranks, respectively. A front-wheel counteracting mechanism is pivotably connected between each of the cranks and the front fork unit to transmit an impact force to the cranks so as to cause opposite upward and downward movements of the front wheels to thereby keep the front wheels in contact with the ground and to render movement of the vehicle steady and safe.

The invention relates to a motor vehicle (1) comprising a chassis frame (2), a platform (5) and at least one folding side (6) movable between a raised position and a lowered position. The platform (5) comprises a stationary portion (50) and at least one lateral movable portion (51) vertically movable between a high position, in which it is flush with the stationary portion (50), and a low position, in which it has been lowered, there being provided means (7) for controlling the vertical movement of the at least one movable portion (51). The or each folding side (6) is connected to a respective movable portion (51) in such a way that they are vertically movable in one piece while the folding side (6) is in the lowered position.

The invention relates to a motor vehicle (1) comprising a chassis frame (2), a platform (5) and at least one folding side (6) movable between a raised position and a lowered position. The platform (5) comprises a stationary portion (50) and at least one lateral movable portion (51) vertically movable between a high position, in which it is flush with the stationary portion (50), and a low position, in which it has been lowered, there being provided means (7) for controlling the vertical movement of the at least one movable portion (51). The or each folding side (6) is connected to a respective movable portion (51) in such a way that they are vertically movable in one piece while the folding side (6) is in the lowered position.