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US 10,518,838 B2Granted
Frame of a vehicle with front wheels
OwnerFu-Long Changinventor
Life of this patent
Estimating the term…
Abstract
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.
Claims16
A frame of a vehicle with two front wheels, comprising:
- a vehicle body mechanism including a head tube;
- a front wheel frame mechanism including a front fork unit which is pivotably connected to said head tube to be rotatable about said head tube, a crank axle which is disposed on and extends in a left-and-right direction from a lower fork end portion of said front fork unit, and two front-wheel cranks each of which is pivoted on said crank axle at a crank end thereof, each of said front-wheel cranks having a free end which is swingable about said crank axle and on which a respective one of the front wheels is pivotably disposed, each of said front-wheel cranks having a front exerting force pivot point which is interposed between said crank end and said free end, said front fork unit having a front fork tube which is pivoted on said head tube and which extends in an upper-and-lower direction to have said lower fork end portion on which said crank axle is disposed, said front-wheel cranks being disposed at left and right sides of said front fork tube;
- a front-wheel counteracting mechanism pivotably connected between said front exerting force pivot points of said front-wheel cranks and said front fork tube of said front fork unit, said front-wheel counteracting mechanism including a pivot axle which extends from said front fork unit, a front seesaw arm which is pivotably disposed on said pivot axle at a middle portion thereof and which has left and right arm ends, and two front damping members, each of which is pivotably connected between one of said left and right arm ends and said front exerting force pivot point of a respective one of said front-wheel cranks and which is configured to transmit upward and downward movements of the front wheels, to absorb shocks subjected onto the front wheels, and, while off the ground, to permit said front-wheel cranks to be moved slowly and downwardly relative to said front fork unit so as to keep the front wheels in a proper position for retouching down and to ensure a smooth landing;
- and
- a rear wheel frame mechanism mounted on said vehicle body mechanism and on which at least one rear wheel is pivotably mounted.
2 more elements
A frame of a vehicle with two front wheels, comprising:
- a vehicle body mechanism including a head tube;
- a front wheel frame mechanism including a front fork unit which is pivotably connected to said head tube to be rotatable about said head tube, a crank axle which is disposed on and extends in a left-and-right direction from a lower fork end portion of said front fork unit, and two front-wheel cranks each of which is pivoted on said crank axle at a crank end thereof, each of said front-wheel cranks having a free end which is swingable about said crank axle and on which a respective one of the front wheels is pivotably disposed, each of said front-wheel cranks having a front exerting force pivot point which is interposed between said crank end and said free end, said front fork unit having a front fork tube which is pivoted on said head tube and which extends in an upper-and-lower direction to have said lower fork end portion on which said crank axle is disposed, said front-wheel cranks being disposed at left and right sides of said front fork tube;
- a front-wheel counteracting mechanism pivotably connected between said front exerting force pivot points of said front-wheel cranks and said front fork tube of said front fork unit, said front-wheel counteracting mechanism includes a gearbox mounted on said front fork unit and having a gear, two racks extending in an upper-and-lower direction, disposed at two opposite sides of said gear and meshing with said gear to be moved in opposite upward and downward movements, and two front damping members, each of which is pivotably connected to said front exerting force pivot point of a respective one of said front-wheel cranks and extends upwardly to be pivotably connected to a respective one of said racks, and which is configured to transmit upward and downward movements of the front wheels, to absorb shocks subjected onto the front wheels and, while off the ground, to permit said front-wheel cranks to be moved slowly and downwardly relative to said front fork unit so as to keep the front wheels in a proper position for retouching down and to ensure a smooth landing;
- and
- a rear wheel frame mechanism mounted on said vehicle body mechanism and on which at least one rear wheel is pivotably mounted.
2 more elements
A frame of a vehicle with two front wheels, comprising:
- a vehicle body mechanism including a head tube;
- a front wheel frame mechanism including a front fork unit which is pivotably connected to said head tube to be rotatable about said head tube, a crank axle which is disposed on and extends in a left-and-right direction from a lower fork end portion of said front fork unit, and two front-wheel cranks each of which is pivoted on said crank axle at a crank end thereof, each of said front-wheel cranks having a free end which is swingable about said crank axle and on which a respective one of the front wheels is pivotably disposed, each of said front-wheel cranks having a front exerting force pivot point which is interposed between said crank end and said free end, said front fork unit having a front fork tube which is pivoted on said head tube and which extends in an upper-and-lower direction to have said lower fork end portion on which said crank axle is disposed, said front-wheel cranks being disposed at left and right sides of said front fork tube;
- a front-wheel counteracting mechanism pivotably connected between said front exerting force pivot points of said front-wheel cranks and said front fork tube of said front fork unit, said front-wheel counteracting mechanism includes a coaxial gearbox mounted on said front fork unit, two counteracting cranks respectively disposed at left and right sides of said coaxial gearbox, and two front damping members, each pivotably connected to said front exerting force pivot point of a respective one of said front-wheel cranks and extending upwardly to be pivotably connected to a respective one of said counteracting cranks, said coaxial gearbox having a box body which is securely mounted on said front fork unit, an idle gear which is rotatably disposed in said box body, and two front gear shafts which are coaxially and pivotably disposed on said box body and which respectively have bevel gear portions that mesh with said idle gear so as to cause rotations of said front gear shafts in opposite rotational directions, each of said counteracting cranks being securely connected with a respective one of said front gear shafts, and having a free end that is swingable with the rotation of the respective one of said front gear shafts and that is pivotably connected to a respective one of said front damping members, such that rotations of said front gear shafts in opposite rotational directions through said idle gear result in upward and downward movements of said free ends of said counteracting cranks, each of said front damping members being configured to transmit upward and downward movements of the front wheels, to absorb shocks subjected onto the front wheels and, while off the ground, to permit said front-wheel cranks to be moved slowly and downwardly relative to said front fork unit so as to keep the front wheels in a proper position for retouching down and to ensure a smooth landing;
- and
- a rear wheel frame mechanism mounted on said vehicle body mechanism and on which at least one rear wheel is pivotably mounted.
2 more elements
Dependencies are inferred from the claim text.