IT201900015482A1 - VEHICLE, ESPECIALLY OF A CYCLING TYPE, ESPECIALLY IN THE FORM OF A BICYCLE - Google Patents

Description

DESCRIPTION

TITLE: VEHICLE, IN PARTICULAR OF A CYCLING TYPE, ESPECIALLY IN THE FORM OF A BICYCLE.

The present invention relates to a vehicle, in particular of the bicycle type, especially constituted by a bicycle.

Preferably, it is a bicycle of the type mountain bike, city bike or the like.

Bicycles, so-called mountain bikes, are known comprising a support frame, wheel means, respectively front and rear, and steering means, in particular in the form of a respective handlebar, in particular comprising a respective connected steering shaft, or supporting, through a corresponding fork, said front wheel means.

Said known bicycles generally consist of a front wheel and a rear wheel to define a single track for advancing the vehicle.

However, especially in off-road or uneven routes, and in particular on mountain paths, even in sports or competitive driving conditions, the balance of the bicycle is quite precarious, and such as to present a high risk of falling.

Not very practical in general, especially for such so-called off-road uses, are the so-called tricycles, which have two rear wheels and one front wheel, which are in fact not very effective driving, which is then practically impossible on particularly bumpy paths and which require very frequent changes in the direction of the vehicle.

In practice, there is a need in the sector to have a vehicle available for off-road routes that allows a completely easy and safe driving for the user, even if this is a person who is not particularly trained to tackle such routes. off-road, especially when these should be particularly bumpy, for example when they consist of mountain paths.

In the sector there is in particular the need to have available a vehicle which is particularly stable during travel, especially when it has to face bends, or when it is necessary to move along steep slopes.

In general, however, there is a need in the sector to have a vehicle available that allows a completely comfortable and easy drive for the user.

The present invention intends to propose a new and alternative solution to the solutions known up to now and in particular it is proposed to obviate one or more of the drawbacks or problems referred to above and / or to satisfy one or more requirements referred to above, and / or however warned in the technique, and in particular deducible from what is reported above.

A vehicle is therefore provided, in particular of the bicycle type, especially consisting of a bicycle, and preferably in the form of a mountain bike, a city bike or the like; comprising a support frame, wheel means, respectively front and rear, and steering means, in particular in the form of a respective handlebar, in particular comprising a respective steering shaft and connected to said front wheel means; characterized in that said front wheel means comprise a first and a second wheels side by side and supported by respective first and second uprights; by the fact that articulated connection means are provided between said steering means, or handlebar, and said first and second front wheels, in particular between said steering shaft and said first and second supporting uprights of said first and second wheels said second front wheels; and by the fact that connection means are provided, in particular for direct connection, of said articulated connection means to said support frame, so that, when said steering means, or handlebar, actuate said articulated connection means by correspondingly rotating said first and second front wheels, the same articulated connection means rotate said first and second front wheels while maintaining their respective virtual points of contact, or centers of rotation on the ground at or near a corresponding axis orthogonal to the longitudinal axis of the vehicle.

The result is a completely easy and safe guide for the user.

This and other innovative aspects are, however, set out in the attached claims, the technical characteristics of which can be found, together with corresponding advantages achieved, in the following detailed description, illustrating purely exemplary and non-limiting embodiments of the invention, and which is made with reference to the attached drawings, in which:

Figure 1A illustrates a schematic side elevation view of a preferred embodiment of the vehicle according to the present invention;

Figure 1B shows a schematic front elevation view of the preferred embodiment of the vehicle according to the present invention;

Figure 1C illustrates a schematic front elevation view of the preferred embodiment of the vehicle according to the present invention, while it is executing a section on a curve;

Figure 1D illustrates a schematic top plan view of the preferred embodiment of the vehicle according to the present invention;

Figure 1E illustrates a schematic plan view from above of the preferred embodiment of the vehicle according to the present invention, while carrying out a section on a curve;

Figure 1F illustrates a schematic front elevation view of the preferred embodiment of the vehicle according to the present invention, in conditions of travel or parking on a sloping ground;

Figure 2 illustrates a schematic perspective view of the preferred embodiment of the means for articulated connection between the steering means and the front wheels of the vehicle according to the present invention;

Figure 3A illustrates a schematic perspective view of the preferred embodiment of only the means for articulated connection between the steering means and the front wheels of the vehicle according to the present invention;

Figure 3B illustrates a schematic view in exploded perspective of the preferred embodiment of only the means for articulated connection between the steering means and the front wheels of the vehicle according to the present invention;

Figure 4A illustrates a schematic perspective view of a part of the preferred embodiment of the means for connection to the frame of said articulated connection means according to the present invention;

Figure 4B shows a schematic top plan view of the preferred embodiment of the means for connection to the frame of said articulated connection means according to the present invention;

Figure 4C illustrates a schematic side elevation view of the preferred embodiment of the means for connection to the frame of said articulated connection means according to the present invention;

Figure 4D illustrates an exploded perspective schematic view of the preferred embodiment of the connection means to the frame of said articulated connection means according to the present invention;

Figures 5 and 6 illustrate respective schematic side and front elevational views of the present preferred embodiment of vehicle in a so-called reduced volume storage or transport condition;

Figures 7A and 7C illustrate corresponding schematic top plan views of the first preferred embodiment, suitable for providing parallel wheel steering, of the articulated connection means according to the present invention, respectively in a forward travel position and in a cornering position to the right;

Figure 7B illustrates a schematic top plan view of the preferred embodiment of the vehicle according to the present invention, mounting the first preferred embodiment, suitable for carrying out a parallel wheel steering of the articulated connection means, while executing a curved section;

Figures 7D and 7E illustrate corresponding schematic cross-sectional views of a detail of the first preferred embodiment articulated connection means according to the present invention, respectively in forward running and rightward bending positions;

Figures 8A and 8C show corresponding schematic top plan views of a second preferred embodiment, suitable for providing kinematic steering, of the articulated connection means according to the present invention, respectively in a forward running position and in a position curve to the right;

Figure 8B shows a schematic top plan view of the preferred embodiment of the vehicle according to the present invention, featuring the second preferred embodiment suitable for providing a kinematic steering of the articulated connection means, while executing a curved section;

Figures 8D and 8E show corresponding schematic cross-sectional views of a detail of the second preferred embodiment articulated connection means according to the present invention, respectively forward running position and rightward bending position;

Figure 8F illustrates a schematic perspective view of the second preferred embodiment of articulated connection means of the vehicle according to the present invention, relating to a condition of execution of a section in curve by the vehicle;

- Figure 9 illustrates a schematic front elevation view of the preferred embodiment of locking means of the relative parallel movement of the steering shaft and of the first and second wheel holder uprights;

Figure 10A illustrates an exploded perspective schematic view of the preferred embodiment of said locking means;

Figure 10B illustrates a partially cut-away schematic perspective view of a detail of the preferred embodiment of said locking means;

Figures 11A to 11D illustrate different operating positions of said locking means;

Figures 12A to 12C show respective schematic front elevational views relating to different operating positions of the front rocker arms of the articulated connection means;

Figures 13A and 13B show respective schematic side elevational views of the preferred embodiment of the damping means used in the vehicle according to the present invention;

Figures 14A and 14B illustrate respective schematic side elevational views of the preferred embodiment of the anti-sinking means during braking used in the vehicle according to the present invention;

Figure 15A illustrates a schematic perspective view in cut-away of a preferred embodiment of vibration damping means, preferably applicable to the supporting uprights of said first and said second front wheels;

Figure 15B illustrates a schematic side view of the preferred embodiment of vibration damping means.

The attached figures illustrate a preferred embodiment 10 of a vehicle, in particular of the bicycle type, especially consisting of a bicycle, and preferably in the form of a so-called mountain bike or the like, or of a vehicle, or bicycle, which is particular suitable to be used also outside of paved or asphalted roads, or on corresponding uneven and / or mountain paths.

However, it must be understood that, although the aforementioned mountain bike is particularly preferred, the present vehicle could also be in the form of a bicycle of any other kind, for example it could also be a so-called city bike or the like.

As can be seen from the figures, the vehicle, or bicycle, therefore comprises a support frame 12, wheel means, respectively front 14 and rear 16, and steering means 18, in particular in the form of a respective handlebar, in particular comprising a respective steering shaft 180 and suitably connected, as will be better understood from the rest of the present description, to said front wheel means 14.

Advantageously, as can be seen from said figures 1A to 1F, said front wheel means 14 comprise a first 141 and a second 142 front wheels, side by side and supported by respective first and second uprights 143, 144, as will be better understood however from the rest of this description.

Furthermore, as can be seen from said figures 1A to 1F, said rear wheel means, preferably comprise a single wheel 16, preferably longitudinally aligned to the longitudinal axis of the vehicle 10, or longitudinally at the center line between said first and second wheels. front 141, 142.

Furthermore, as can be seen from said figures from 1A to 1F, the vehicle comprises seating means for the user, in particular in the form of a saddle 17, supported by the frame 12 of the vehicle.

In particular, as can be seen from the same figures from 1A to 1F, said steering shaft 180 is rotatably supported by said support frame 12, in particular by a front tube portion 121 thereof.

In particular, as illustrated, said steering shaft 180 is coaxially inserted in said steering tube 18 and exits from this at the top, towards said steering means, or handlebar, 18, and below, towards said front wheel means 14, or towards said means 20 for articulated connection thereto, as will be better understood in any case from the rest of the present description.

In particular, as can be seen from said figures 1A to 1F, said handlebar 18 comprises an elongated transverse bar 181 on which means, in particular a first and a second grip, are provided for engaging and gripping the user's hands, and which are preferably arranged at the opposite lateral ends 18 ', 18' 'of the same handlebar. Preferably, from said elongated transverse bar 181, said steering shaft 180 extends centrally, which preferably extends until it is inserted into said tube 121 of the frame.

In particular, as can be seen from said figures 1A to 1F, said support frame 12 comprises a column element 120, extending at the top and preferably intended to connect and support the seat saddle for the user, an upper longitudinal element 122, which extends between the upper part of the said steering column element 120 and the said steering tube 121, and an oblique element 123, which extends from the said steering tube 121, preferably up to the lower part of the said steering column element 120 .

Advantageously, therefore, said front wheel means 14 comprise a first 141 and a second 142 wheels side by side and supported by respective first and second uprights 143, 144. In this way it is possible to have available a vehicle which has improved stability.

Advantageously, articulated connection means 20 are also provided between said steering means 18, or handlebar, and said first and second front wheels, in particular between said steering shaft 180 and said first and second uprights 143, 144 for supporting said first and said second front wheels 141, 142.

Furthermore, advantageously, means 22 are provided for connecting said articulated connection means 20 to said support frame 12, such that, when said steering means 18, or handlebar, actuate said articulated connection means 20 to rotate correspondingly the said first and second front wheels 141, 142, the same articulated connection means 20 rotate the said first and second front wheels 141, 142 while maintaining the respective virtual points of contact, or centers of rotation A, B, on the ground in correspondence with, or in proximity to, a corresponding axis orthogonal to the longitudinal axis of the vehicle, as can be clearly seen from figures 7A, 7B, 8A and 8B.

The result is a completely comfortable and easy drive for the user, who can therefore also consist of a person who is not particularly trained to drive this kind of vehicle, in particular along off-road and / or bumpy paths, and especially along mountain routes.

Furthermore, as will be better understood in any case from the rest of the present description, said connection of the articulated connection means 20 to the frame 12 further allows, in the event of obstacles which provide a blow, or collision, against one of said first and second front wheels , to avoid unloading this longitudinal action on the guide means, or on said handlebar and the driver must therefore not exert an excessive effort in these conditions to maintain the driving of the vehicle.

With an advantage, as can be seen in particular from Figures 2 to 4D, said means 22 for connecting said articulated connection means 20 to said support frame 12 are in the form of means which, in particular when a corresponding curve is carried out , allow at least a relative movement of the said articulated connection means 20 with respect to the said support frame 12.

As can be seen in particular from Figures 2 to 4D, said means 22 for connecting said articulated connection means 20 to said support frame 12 are in the form of means which, in particular when a corresponding curve is carried out, allow at least a rotation of said articulated connection means 20 with respect to said support frame 12.

In particular, as can be seen in particular from Figures 2 to 4D, said means 22 for connection of said articulated connection means 20 to said support frame 12 are in the form of means which, in particular when a corresponding curve path is carried out , allow a translation, in particular forwards and backwards, of the same articulated connection means 20 with respect to said support frame 12, in particular said translation having a respective component of displacement according to the direction longitudinal to the vehicle 10.

Advantageously, therefore, said means 22 for connecting said articulated connection means 20 to said support frame 12, in particular when a corresponding curve path is carried out, allow a rototranslation movement of said articulated connection means 20 with respect to said frame support 12, in particular a rotation movement associated with a translation movement of the same articulated connection means 20.

With particular advantage, as can be seen in particular from Figures 2 to 4D, said means 22 for connecting said articulated connection means 20 to said support frame 12 comprise a ball joint 22a, which allows a corresponding rotation of said connection means articulated 20 with respect to said support frame 12.

Advantageously, as can be seen in particular from Figures 2 to 4D, said means 22 for connecting said articulated connection means 20 to said support frame 12 comprise a sliding pin 22b, which allows a linear translation movement, in in particular according to a direction which comprises a component longitudinal to the vehicle, of the said articulated connection means 20 with respect to the said support frame 12.

Advantageously, as can be seen in particular from the figures, said ball joint 22a is mounted slidingly on said sliding pin 22b.

With an advantage, as can be seen in particular from Figures 2 to 4D, said connection means 22 of said articulated connection means 20 to said support frame 12 are connected, in particular directly connected, or, according to another embodiment, they are not shown in the attached figures integral with said support frame 12, in particular with the oblique element 123 of the same support frame 12, preferably being connected in correspondence with an area of this oblique element 123 of the frame 12 which is close to said sleeve 121 for said steering shaft 180.

Moreover, advantageously, as can be seen in particular from Figures 2 to 4D, said means 22 for connecting said articulated connection means 20 to said support frame 12 are fixed to said articulated connection means 20.

Advantageously, as can be seen in particular from Figures 2 to 4D, said connection means 22 of said articulated connection means 20 to said support frame 12 comprise an element 221 fixed, or fixable, to said support frame 12, in particular to said oblique element 123 thereof, and an element 222, which is fixed to said articulated connection means 22.

With particular advantage, said element 221 fixed, or fixable, to said frame 12 and said element 222 fixed to said articulated connection means 20 are connected to each other through corresponding articulated connection means 22a, 22b.

With an advantage, as can be seen in particular from Figures 2 to 4D, said element 221 fixed, or fixable, to said support frame 12 of said connection means 22 is fixed to said support frame 12 through corresponding fixing means 223 , in particular in the form of winding means, or band, which wrap around the and fasten to the corresponding element, in particular to the said oblique element 123, of the said support frame 12 and which are fixed to the said fixed element 221, or it can be fixed to said support frame 12 by means of corresponding screws 223v, in particular screwing into holes 221f opening in correspondence with corresponding lateral faces 221d, 221s of this, and which, preferably, face rearwards to the same element 221 fixed, or fixed, to the said support frame 12.

Advantageously, as can be seen in particular from Figures 2 to 4D, said element which is fixed or can be fixed to said support frame 12 of said connection means 22 is in the form of a respective block, in particular with a squat shape, 221.

Advantageously, as can be seen in particular from Figures 2 to 4D, said block 221 of said connection means 22 has a rear face for engagement with said frame 12, or with said oblique element 121 thereof, which is shaped in such a way as to present a corresponding elongated support groove 221g which wraps around the same frame 12, or on the corresponding oblique tubular element 123 thereof.

Advantageously, as can be seen in particular from said Figures 2 to 4D, that said block 221 fixed, or fixable, to said support frame 12 of said connection means 22 has a housing cavity 221b for an extreme part of said pin. sliding 22b, in particular said cavity 221b opening at a corresponding front face, in use, 221a of said block 221.

As illustrated, said block 221 also has a main part 221 ', front in use, defining said front face 221a as an extension for the sliding pin 22b, from which a corresponding secondary part 221' 'extends at the rear, defining said engagement surface 221g to the frame 12. On said main part 221 ', laterally to said rear secondary part 221', the said lateral faces 221d, 221s extend for engagement for the fixing means 223, from which they extend opposite side faces 221'l, 221'l, converging forward, similarly to the side faces 221''l, 221''l of said secondary portion 221 '', which extend from the opposite side of the same side faces 221d, 221s of engagement for fastening means 223.

Said main part 221 'and secondary part 221' 'are delimited perpendicularly by corresponding and opposite surfaces 221p' and 221p '', mutually parallel, from which said front surface 221a and a corresponding lower surface respectively extend, in use, 221i, converging at a respective common side and angularly spaced from each other by a respective angle, preferably by an angle of 90 °.

As illustrated, the said main part also has a large lightening hole that extends between said perpendicularly opposite surfaces 221p ', 221p' '.

With an advantage, as can be seen in particular from Figures 2 to 4D, said element 222 fixed to said articulated connection means 20 has pin means, in particular in the form of first and second pins 222p, 222p, which are inserted in corresponding holes 20f, 20f of said articulated connection means 20.

Advantageously, said element 222 fixed to said articulated connection means 20 is in the form of a respective block 24, which comprises a transversely elongated element 241, from which, preferably, the said pin means 222p, 222p.

With particular advantage, as can be seen in particular from Figures 2 to 4D, said element, or block, 24, fixed to said articulated connection means 20 has a respective internal perimeter surface, in particular provided in said transverse element 241, which defines a cavity 222c, in particular through, forming a seat for housing, with engagement, the said ball joint 22a mounted, in particular with the possibility of running, or relative movement, on the said sliding pin 22b, and in particular able to allow the passage through the same sliding pin 22b.

Advantageously, as can be seen in particular from Figures 2 to 4D, between said cavity 222c of said element, or block 222, fixed to said articulated connection means 20, defining the seat for housing, with engagement, said spherical joint 22a mounted on said sliding pin 22b, a plane rotation element is provided, in particular in the form of a bearing element 222r, in particular which is mounted on said spherical element defining the corresponding joint and which engages, with friction, with its external surface 22a '', the internal surface of said housing cavity 222c, which bearing element 222r allows said articulated connection means 20 to perform a wide angular excursion, in the vertical plane, in both directions of angular rotation. As illustrated, the said first and second pins 222p, 222p are positioned, according to the longitudinal direction to the vehicle, on the sides of the said housing cavity 222c for the said articulation means 22a, 22b.

Advantageously, as can be seen from the figures, articulated connection means 20 are provided between said steering means 18, or handlebar, and said first and second front wheels, in particular between said steering shaft 180 and said first and second uprights 143, 144 supporting said first and said second front wheels 141, 142, which are adapted to maintain the steering shaft 180, and said front wheel uprights 143, 144, or said first and second front wheels 141, 142, parallel to each other, during the lateral inclination, or roll, phases of the vehicle, and / or during the positioning phases at a different level of said first and second front wheels 141, 142.

In this way, the attitude of the vehicle always remains optimal for the user, both when he has to face cornering sections that require the vehicle to be tilted sideways, as illustrated for example in figure 1C, and when he has to travel along stretches in which the wheels are at different height levels from each other, for example when traveling along an inclined slope along a direction parallel to the same slope, as illustrated for example in Figure 1F.

With advantage, as can be seen from the figures, in practice, articulated connection means 20 are provided between said steering means 18, or handlebar, and said first and second front wheels, in particular between said steering shaft 180 and said first and second uprights 143, 144 supporting said first and second front wheels 141, 142, which comprise means 21 which guide the movement of said steering shaft 180 and said first and second uprights 143, 144 which bring the respective first and second front wheels 141, 142, during the lateral inclination or roll movements of the vehicle, and / or during the positioning movements to a different level of the said first and second front wheels 141, 142, in particular keeping said steering shaft 180 and said first and second uprights 143, 144 which carry the respective first and second front wheels 141, 142 parallel to each other.

Advantageously, as can be seen from the figures, said means 21 which guide the movement of said steering shaft 180 and first and second uprights 143, 144 which carry the respective first and second front wheels 141, 142, during lateral inclination movements, or roll, of the vehicle, and / or during the movements of arrangement at a different level of said first and second front wheels 141, 142, are in the form of a kinematic mechanism of the type with an articulated parallelogram 21.

Advantageously, as can be seen from the figures, said means 21 which guide the movement of said steering shaft 180 and of said first and second uprights 143, 144, which carry the respective first and second front wheels 141, 142, comprise a rocker arm. upper transverse rocker 211, a lower transverse rocker arm 212 and corresponding perpendicular elements, including a central perpendicular element 210, which comprises, or is integral with, said steering shaft 180, and opposite lateral perpendicular elements 213 and 214, which comprise, or are integral with to said first and second uprights 143, 144, said transverse rockers 211, 212 and said perpendicular elements 210, 213, 214 being correspondingly connected to each other through corresponding rotation hinges.

With particular advantage, as can be seen from the figures, said upper transverse rocker 211, lower transverse rocker 212 and perpendicular elements 210, 213, 214, of said means 21 which guide the movement of said steering shaft 180 and of said first and second uprights 143, 144 which carry the respective first and second front wheels 141, 142, are connected to each other through corresponding flat rotation hinges 215, preferably defined by corresponding bearing means 215.

In particular, six rotation hinges are provided, of which three hinges are for connecting the upper transverse rocker 211 respectively to said central perpendicular element 210 and to the opposite lateral perpendicular elements 213, 214, and three other hinges are for connecting the lower transverse rocker 212 respectively to said central perpendicular element 210 and to opposite lateral perpendicular elements 213, 214.

With an advantage, as can be seen from the figures, said hinges 215 for rotation of said upper transverse rocker 211 and lower transverse rocker 212, with respect to the perpendicular elements 210, 213, 214, of said means 21 which guide the movement of said steering shaft 180 and said first and second uprights 143, 144, are provided between the respective upper or lower transverse rocker 211, 212 and a corresponding element 216 for attachment of the respective perpendicular element 210, 212, 213, or respectively for attachment of the respective perpendicular end of the central perpendicular element 210, which comprises or is integral with said steering shaft 180, and with opposite lateral elements 213 and 214, which comprise, or are integral with, said first and second uprights 143, 144 which respectively carry said first and second front wheels 141, 142.

Advantageously, as can be seen from the figures, the respective upper rocker 211 and lower 212 have corresponding seats 21s for receiving respective hinges, or bearings, 215 for articulation with said perpendicular elements, or with said central perpendicular element 210, which comprises or is integral with said steering shaft 180, and with opposite lateral perpendicular elements 213 and 214, which comprise or are integral with said first and second uprights 143, 144 which carry said first and second wheels respectively front 141, 142.

Advantageously, as can be seen from the figures, the respective element 216 for attachment of the respective perpendicular element 210, 212, 213, extending between said upper transverse rocker 211 and lower transverse rocker 212, or respectively for attachment of the central perpendicular element 210, which comprises, or is integral with, said steering shaft 180, and for attachment of opposite lateral perpendicular elements 213 and 214, which comprise or are integral with said first and second uprights 143, 144 which respectively carry said first and second wheels 141, 142, is in the form of a body 216 which is fixed to the respective hinge 215, and in particular has a respective pin 216a for insertion into said bearing 215 inserted in the corresponding seat 21s of the respective rocker arm 211, 212.

Advantageously, as can be seen from the figures, said upper transverse rocker 211 and said lower transverse rocker 212 are perpendicularly aligned with each other.

Advantageously, as can be seen from the figures, said perpendicular elements, or said central perpendicular element 210, which comprises, or is integral with, said steering shaft 180, and the opposite lateral perpendicular elements 213 and 214, which comprise, or are integral with said first and second uprights 143, 144 which respectively carry said first and second front wheels 141, 142, are arranged at the rear with respect to said upper transverse rocker 211 and lower transverse rocker 212, and, in particular, are transversely aligned between of them.

With an advantage, as can be seen in particular from the figures, articulated connection means 20 are provided between said steering means, or handlebar, 18 and said first and second front wheels 141, 142, in particular between said steering shaft 180 and said first and second uprights 143, 144 supporting said first and second front wheels 141, 142, which articulated connection means 20, when said steering means, or handlebar 18 are rotated, rotate correspondingly the said first and second front wheels 141, 142.

In this way, the vehicle can be steered along a desired curve path.

With particular advantage, as can be seen from the figures, articulated connection means 20 are provided between said steering means 18, or handlebar, and said first and second front wheels, in particular between said steering shaft 180 and said first and second uprights 143, 144 for supporting said first and second front wheels 141, 142, which comprise means 23 which provide, following the rotation of said steering means, or handlebar 18, a corresponding rotation of said first and second front wheels 141, 142, or a corresponding rotation of said first and second uprights 141, 142, which respectively carry said first and second front wheels 143, 144.

Advantageously, as can be seen from the corresponding figures 1A to 7E, said means 23 which provide a corresponding rotation of said first and second front wheels 141, 142 arrange said first and second front wheels 141, 142 parallel to each other, or oriented according to the same steering angle, in particular with respect to the longitudinal direction of the vehicle.

Advantageously, as can be seen from the corresponding figures 8A to 8F, said means 23 which provide a corresponding rotation of said first and second front wheels 141, 142 arrange said first and second front wheels 141, 142 to each other concentric, or oriented with a different steering angle such as to allow the same first and second front wheels 141, 142 to be able to travel along respective circular trajectories which are concentric to each other and preferably, as can be seen from the corresponding figure, which are concentric to the circular trajectory to be traveled the corresponding rear wheel 16 of the vehicle 10.

Advantageously, said means 23 which, following the rotation of said steering means, or handlebar 18, provide a corresponding rotation of said first and second front wheels 141, 142 are in the form of a kinematic mechanism of the type with an articulated parallelogram.

Advantageously, as can be seen from the figures, said means 23 which, following the rotation of said steering means, or handlebar 18, provide a corresponding rotation of said first and second front wheels 141, 142 comprise a corresponding rear transverse element 231 and a front transverse element 211, 212 connected to each other through corresponding longitudinal elements, including a central longitudinal element 210, which is integral with said steering shaft 180, and opposite lateral longitudinal elements 213 and 214, which are integral with said first and according to uprights 143, 144, said rear and front transverse elements 231 and 211, 212 and said longitudinal elements 210, 213, 214 being correspondingly connected to each other through corresponding rotation hinges 235.

Advantageously, as can be seen from the figures, said front transverse element 211, 212 is defined by said parallelogram means 21, or comprises said upper rocker 211 and said lower rocker 232.

With particular advantage, as can be seen from the figures, said rear transverse element is defined by a corresponding rear rocker element 231.

Advantageously, as can be seen in particular from Figures 2 to 4D, said means 22, for connecting said articulated connection means 20 to said support frame 12, are fixed to said rear transverse element, or rocker element 231 , which has corresponding holes 20f, 20f, opening at the respective rear face, within which said first and second pins 222p, 222p of said connection means 22 are inserted.

Advantageously, said rear transverse element 231, said front transverse element 211, 212 and the corresponding longitudinal elements 210, 213, 214, of said means 23 which provide, following the rotation of said steering means, or handlebar 18, a corresponding rotation of said first and second front wheels 141, 142, are connected to each other through corresponding flat rotation hinges 235, preferably defined by corresponding bearing means 235, and in particular rotating according to respective rotation axes which are orthogonal to the axes of rotation rotation of the rotation hinges, or bearing means 215, which connect said upper transverse rocker 211, lower transverse rocker 212 and the perpendicular elements 210, 213, 214, of said means 21 which guide the movement the parallel movement of said steering shaft 180 and said first and second uprights 143, 144.

In practice, as can be seen from the figures, perpendicular and longitudinal elements are provided, in particular including a central perpendicular and longitudinal element 210, which is integral with said steering shaft 180, and opposite lateral perpendicular and longitudinal elements 213 and 214, which are integral with said first and second uprights 143, 144, which jointly connect said upper rockers 211 and lower 212, and which connect these upper rockers 211 and lower 212, in an articulated way to said transverse element or rocker rear 231.

Advantageously, the respective perpendicular and longitudinal element 210, 213, 214 comprises a front perpendicular rod 25a, a rear perpendicular rod 25b, an upper longitudinal arm 27a and a lower longitudinal arm 27b, in particular connected in a quadrangle to each other.

Advantageously, the steering shaft 180 and said first and second uprights 143, 144, which carry said first and second front wheels 141, 142, are fixed to said upper longitudinal arm 27a and lower longitudinal arm 27b, respectively of said element perpendicular and central longitudinal 210, and of the opposite lateral perpendicular and longitudinal elements 213 and 214.

Advantageously, as can be seen from the figures, the attachment elements 216 which connect said upper transverse rocker 211 and lower transverse rocker 212, to said perpendicular and longitudinal elements 210, 213, 214, are connected to the respective front perpendicular rods 25a, of the same perpendicular and longitudinal elements 210, 213, 214, in particular at the opposite perpendicular ends of these.

Advantageously, as can be seen from the figures, the attachment elements 216 which connect said upper transverse rocker 211 and lower transverse rocker 212, to said perpendicular and longitudinal elements 210, 213, 214, have a respective enlarged part 216b, which defines a respective housing seat 216s for a corresponding hinge, or bearing, 235 for articulation of said upper transverse rocker 211 and lower transverse rocker 212 with the same front perpendicular rods 25a of the corresponding perpendicular and longitudinal elements 210, 213, 214.

In particular, as illustrated, the respective hinge, or bearing, 235 coaxially connects with the same front perpendicular rod 25a of the respective perpendicular and longitudinal element 210, 213, 214.

With particular advantage, said rear transverse element, or rocker arm 231 is connected to said perpendicular and longitudinal elements, in particular including a central perpendicular and longitudinal element 210, which is integral with said steering shaft 180, and opposite lateral perpendicular and longitudinal elements 213 and 214, which are integral with said first and second uprights 143, 144, through respective rotation hinges, in particular flat ones, or bearings, 215, in particular which rotate with axis parallel to the rotation hinges 215 of said means 21 which they guide the relative movement of said lower transverse rocker 211 and lower transverse rocker 212 with respect to the same perpendicular and longitudinal elements 210, 213, 214, or with respect to the front perpendicular rods 25a of these.

Advantageously, said rear transverse element, or rocker arm 231 is connected to said perpendicular and longitudinal elements 210, 212, 213 through corresponding attachment elements 236, which in particular are connected to the respective rotation hinges 215 through a corresponding pin 236p which it fits coaxially into the corresponding seat 23p of said rear transverse element, or rocker arm 231 and into the hinge 215 housed therein.

Advantageously, the attachment elements 236 which connect said rear transverse element, or rocker arm 231 to said perpendicular and longitudinal elements 210, 213, 214, have a respective enlarged part 236b, which defines a respective housing seat 236s for a corresponding hinge, or bearing, 235 for articulation of the rear transverse element, or rocker arm 231 with the rear perpendicular rods 25b of the corresponding perpendicular and longitudinal elements 210, 213, 214; in particular, the respective hinge, or bearing, 235 coaxially connects with the same rear perpendicular rod 25b of the respective perpendicular and longitudinal element 210, 213, 214, preferably in correspondence with an intermediate region of this.

Advantageously, the respective rocker element 211, 212, 231 is defined by an elongated bar, preferably made of metal, having corresponding through cavities intended to define seats for housing for corresponding hinges or rotation bearings in the plane of the rocker itself. .

Advantageously, as can be seen from the figures, the respective upper longitudinal arm 27a and lower longitudinal arm 27b, respectively of said central perpendicular and longitudinal element 210 and of the opposite lateral perpendicular and longitudinal elements 213 and 214, connecting between the rear 23 and front transverse elements 21, has a corresponding housing and retaining seat 270 for a corresponding portion, or external surface, respectively of the steering shaft 180 and of said first and second uprights 143, 144, which carry said first and second front wheels 141, 142 .

In particular, the respective seat 270 is provided in correspondence with an enlarged area and / or longitudinal center line of the corresponding longitudinal arm 27a, 27b.

Advantageously, as can be seen from the figures, said seat means 270, respectively for said steering shaft 180 and said first and second support uprights 143, 144 respectively, of said first and said second front wheels 141, 142, comprise a perimeter surface for engagement against the respective outer surface of said steering shaft 180 and of said first and second uprights 143, 144 supporting respectively said first and said second front wheels 141, 142. As illustrated, means are provided clamping of said perimeter surface of the respective seat 270 in engagement against the corresponding surface of said steering shaft 180 and of said first and second support uprights 143, 144 respectively, of said first and said second front wheels 141, 142.

With particular advantage, as can be seen in particular from Figures 7A and 7B, the elements 216, 236, for attachment between the longitudinal perpendicular elements 210, 213, 214 and the front transverse elements 211, 212 and rear 231, are configured in such a way to arrange parallel to each other the said central perpendicular and longitudinal element 210 and lateral elements 213, 214 for connection between the rear transverse element 231 and the front transverse element 211, 212, of the said means 23 which provide, following the rotation of the said steering means, or handlebar 18, a corresponding rotation of said first and second front wheels 141, 142, so as to arrange by steering said first and second front wheels 141, 142 parallel to each other, or oriented according to the same steering angle.

With an advantage, as can be seen in particular from Figures 8A to 8F, in the second preferred embodiment of articulated connection means, the elements 216, 236, for attachment between the longitudinal perpendicular elements 210, 213, 214 and the front transverse elements 211, 212 and rear 231 are configured in such a way as to have converging to each other at a rear point, in particular at the hub of the rear wheel 16, said central perpendicular and longitudinal element 210 and lateral elements 213, 214 for connection between the the rear transverse element 231 and the front transverse element 211, 212, of the said means 23 which provide, following the rotation of the said steering means, or handlebar 18, a corresponding rotation of the said first and second front wheels 141, 142 , in such a way as to arrange, by steering, said first and second front wheels 141, 142 concentric with each other, or oriented with a different angle the steering wheel such as to allow the same first and second front wheels 141, 142 to be able to travel along respective circular trajectories which are concentric with each other.

In this way, an optimal type of steering can be performed, in particular a so-called kinematic steering, that is a steering which does not provide substantial transverse sliding of the wheels during the same steering phase or execution of sections in curves.

For this purpose, in this second preferred embodiment of the articulated connection means, it is advantageously provided that the enlarged portion 236b of the attachment elements 236, which connect said rear transverse element, or rocker arm 231 to said lateral or external perpendicular and longitudinal elements 213 , 214, or to the corresponding rear perpendicular rod 25b, is positioned protruding towards the internal part of the articulated connection means 20, i.e. it is such as to arrange the corresponding housing seat 236s for a corresponding hinge, or bearing, 235 for articulation of the element rear transverse, or rocker arm 231 with the rear perpendicular rods 25b of the corresponding lateral or external perpendicular and longitudinal elements 213, 214, longitudinally offset towards the central part of the articulated connection means 20, with respect to the corresponding joint seat 216s of the enlarged portion 216b of the elements of attachment 216, which connect the lateral or external perpendicular and longitudinal elements 213, 214, or the corresponding perpendicular rod 25a, to the front transverse elements, or rocker arms 211, 212.

Advantageously, as can be seen from Figure 3A, means 30 are provided for stopping the relative parallel movement of said steering shaft 180 and first and second uprights 143, 144.

Advantageously, as can be seen from Figure 3A, said means 30 for stopping the relative parallel movement of the relative parallel movement of said steering shaft 180 and first and second uprights 143, 144 are provided between said upper transverse rocker 211 and lower transverse rocker 212 of said articulated connection means 20, and in particular they are in the form of corresponding pad means 30, protruding perpendicularly from the surface of the respective transverse rocker element 211 which faces the other transverse rocker element 212, and able to contact the counter-facing surface of said other transverse rocker element 212. In particular, as illustrated, said pad means 30 protrude from the upper surface of the respective transverse lower rocker element 211.

Advantageously, as can be seen in particular from Figures 9 to 12C, there are also provided means 26 for locking the relative parallel movement of the steering shaft 180 and a first and a second uprights 143, 144 which carry the respective first and second front wheels 141, 142 of the vehicle.

In this way, in the event of a stop, the vehicle can be kept standing autonomously, possibly even on a respective slope, as can be seen in particular from figures 12A, 1F and 12B, or the wheels can be brought as close as possible 141, 142 of the vehicle, so as to minimize the transverse extension of the same vehicle, in view of its location in a convenient environment or on a corresponding means of transport, for example behind a car or on a caravan, or other, such as can be seen from figures 5, 6 and 1C.

Advantageously, as can be seen in particular from the corresponding figures, said means 26 for locking the relative parallel movement of said steering shaft 180 and said first and second uprights 143, 144, which carry the respective first and second front wheels 141, 142, they are adapted to block said means 21 which guide the parallel movement of said steering shaft 180, in particular the movement of the corresponding articulated parallelogram kinematics 21.

Advantageously, as can be seen from the figures, said means 26 for locking the relative parallel movement of said steering shaft 180 and of said first and second uprights 143, 144, which carry the respective first and second front wheels 141, 142, are connected to the upper transverse rocker 211 and to the lower transverse rocker 212 of the means 21 which guide the movement of said steering shaft 180 and of said first and second uprights 143, 144, in such a way as to block the relative movement of mutual approach and distancing between said upper transverse rocker 211 and lower transverse rocker 212.

Advantageously, as can be seen from the figures, said means 26 for locking the relative parallel movement of said steering shaft 180 and of said first and second uprights 143, 144, which carry the respective first and second front wheels 141, 142, comprise a block 261 fixed to said upper rocker 211 and a block 262 fixed to said lower rocker 212, as well as an intermediate body 260 extending and connected between said block 261, fixed to said upper transverse rocker 211, and said block 262, fixed to said lower rocker 222, which is rotatable with respect to said upper rocker 231 and with respect to said lower rocker 232.

In particular, said intermediate body 260 is pivoted at 2601 and 2602 respectively to said upper transverse rocker 211 and said lower transverse rocker 212.

In turn, as illustrated, said block 261 and said block 262 are in the form of corresponding semi-annular bodies fixed, at the respective ends 261p, 261p and 262p, 262p, respectively to said upper transverse rocker 211 and said lower transverse rocker to 212.

With advantage, as can be seen from the figures, said means 26 for locking the relative parallel movement of said steering shaft 180 and first and second uprights 143, 144 which carry the respective first and second front wheels 141, 142 comprise means 26p, 26s of mutual engagement and disengagement which are provided, respectively, on said intermediate body 260 and on said block 261 fixed to said upper transverse rocker 211 and / or on said block 262 fixed to said lower rocker 212.

With particular advantage, as can be seen from the figures, said mutual engagement and disengagement means, provided respectively on said intermediate body 260 and on said block 261 fixed to said upper transverse rocker 211 and / or on said block 262 fixed to said lower rocker, they comprise pin means 26p, which are inserted into corresponding seat means 26s.

Advantageously, as can be seen from the corresponding figures, said pin means 26p are provided on said intermediate body 260 and said seat means 26s are provided on said block 261 fixed to said upper transverse rocker 211 and / or on said fixed block 262 to said lower rocker 222, preferably said pin means comprise respective first and second pin 26p, 26p, each being able to engage respective seat means 26s, 26s on said block 261 fixed to said upper rocker 211 and on said block 262 fixed to said lower rocker 212. Said first and second pivots 26p, 26p extend from said intermediate body 260, preferably along parallel directions, with mutually opposite movements.

Advantageously, as can be seen from the corresponding figures, said seat means 26s on said block 261 fixed to said upper transverse rocker 211 and on said block 262 fixed to said lower transverse rocker 212 comprise a respective plurality of distributed seats 26s, in particular angularly distributed , and in particular positioned in a relationship of simultaneous engagement and disengagement by corresponding pins 26p, 26p of said intermediate body 260, which are preferably simultaneously activated and deactivated, respectively, in engagement and disengagement of the corresponding seats 26s.

Advantageously, as can be seen from the corresponding figures, the respective plurality of angularly distributed seats 26s are provided on a corresponding semicircular segment on said block 261 fixed to said upper rocker 211 and / or on said block 262 fixed to said lower rocker 212, said seats 26s open on the convex face of the same circular segment so as to be able to receive a corresponding engagement pin 26p.

Advantageously, as can be seen from the corresponding figures, said circular segment on said block 261 fixed to said upper rocker 211 and said circular segment on said block 262 fixed to said lower rocker 212 are fixed to the corresponding upper or lower rocker 211, 212 through corresponding screw means 261p, 261p and 262p, 262p provided at the ends of the respective segment.

In this way, a locking can be made which is completely reliable and safe.

Advantageously, as can be seen from the figures, said means 26 for locking the relative parallel movement of said steering shaft 180 and first and second uprights 143, 144 which carry the respective first and second front wheels 141, 142 comprise respective activation means 265 and deactivation of the locking condition.

With particular advantage, as can be seen from the figures, said means for activating and deactivating the locking comprise a rotating knob 265, in particular positioned at the front on said intermediate body 260.

In this way, it can be locked and unlocked in a particularly easy and convenient way for the user.

Advantageously, as can be seen from the figures, said means for activating and deactivating the locking, or rotary knob, 265 are adapted to move said first and second engagement pins 26p, 26p between an advanced position outside the, and a retracted position in the respective housing 26'p, 26'p provided inside said intermediate body 260.

Advantageously, as can be seen in particular from Figure 10B, said means for activating and deactivating the locking, or rotary knob, 265 are movable between a rest position, in which they are normally and elastically pushed, by a corresponding spring presser 266 , and a position in which they are adapted to move said first and second pivots 26p, 26p between an advanced engagement position and a retracted disengagement position with the corresponding seat means 26s.

Advantageously, said means for activating and deactivating the locking, or rotary knob, 265 have respective means, in particular defined by corresponding slot means 267, for moving corresponding pins inserted therein 268 and integral with and protruding perpendicularly from the corresponding first and second engagement pin 26p, 26p for exerting a corresponding thrust, forwards and backwards, of the engagement pins 26p, 26p, in particular following the rotation of the respective activation wheel 265.

Advantageously, as can be seen from the figures, said rotary knob 265 has an external shaped surface for gripping the user.

Advantageously, as can be seen from the figures, a first and a second uprights 143, 144 are provided which support, in particular through corresponding cantilevered hubs 143m, 144m, respectively a first and a second wheel 141, 142 so that the center of instantaneous rotation, or midpoint of support on the ground of said first and second front wheels 141, 142, both laterally outwards with respect to the corresponding first and second uprights 143, 144 supporting, respectively, said first and said second front wheels 141, 142.

In this way, wheels of any diameter and thickness can be used in the present vehicle, without the risk of interfering with the articulated connection means of the same vehicle and, therefore, moreover, without having to excessively raise the center of gravity of the same articulation means and of the vehicle itself. , as will be better understood in any case from the rest of this description.

In practice, as can be seen from the figures, preferably the present articulated connection means have their respective and opposite lateral ends, which are located transversely inside with respect to the planes on which the front wheels 141, 142 of the vehicle lie.

With an advantage, as can be seen in particular from Figures 2, and from 13A to 14B, damping means 28 are provided between the respective wheel, in particular the respective front wheel 141, 142, and the corresponding support means, i.e. the corresponding upright 143, 144 supporting the same wheel 141, 142.

Advantageously, as can be seen in particular from said figures 2, and from 13A to 14B, said cushioning means 28 comprise a respective damper member 280, in particular in the form of a corresponding elongated element, having corresponding first and second anchoring portions 280a, 280b, in particular extreme ones, between which anchoring portions 280a, 280b the shock absorber member 280 is able to compress and expand.

Said first anchoring portion 280a is integral with the corresponding wheel 141, 142 and said second anchoring portion 280b is, in turn, connected to the means, or upright, 143, 144 for supporting the corresponding wheel 141, 142, in a movable and such as to approach said first anchoring portion 280a, integral with the corresponding wheel 141, 142, during the compression steps of said shock absorber member 280.

In this way, the anchoring points are both movable but with different excursion along the axis of the same shock absorber 280. The result is a still gentle cushioning, also active for limited or low stress compressions for the corresponding shock absorber organ 280.

With particular advantage, as can be seen in particular from said figures 2, and from 13A to 14B, said first and second anchoring portions 280a, 280b of said shock absorber member 280 are supported on corresponding first and second support arms 281, 282, which first and second support arms 281, 282 are connected, in particular are pivoted, to the corresponding means, or upright, 143, 144 supporting the corresponding wheel 141, 142 and move, in particular they are connected to each other, so such that said second anchoring portion 280b, connected to the means, or upright, 143, 144 supporting the corresponding wheel 141, 142, approaches said first anchoring portion 280a, integral with the corresponding wheel 141, 142, during the compression of said shock absorber member 280.

Advantageously, as can be seen in particular from said figures 2, and from 13A to 14B, said first and second arms 281, 282 which carry the anchoring points 280a, 280b of said shock absorber member 280 are pivoted to the respective upright 143, 144 supporting the respective wheel 141, 142 at points 281f, 282f located at different heights of the same post 143, 144, or respectively at the lower end of said post 143, 144 and at an intermediate point of the lower portion 143 '' , 144 '', preferably angled, especially forward, with respect to the attachment portion 143 ', 144' to said articulated connection means 20, of the same upright 143, 144.

Advantageously, as can be seen in particular from said figures 2, and from 13A to 14B, said second arm 282 which carries the second anchoring point 280b of said shock absorber member 280 is pivoted to the respective upright 143, 144 supporting the respective wheel 141 , 142 at a point 282f of the respective upright 143, 144 which is on the side opposite to that of extension of the same second support arm 282.

With an advantage, as can be seen in particular from said figures 2, and from 13A to 14B, said first and second arms 281, 282 which carry the anchoring points 280a, 280b of said shock absorber member are rigidly connected to each other, in particular in correspondence of the respective free ends 281e, 282e, preferably through a corresponding spacer element 283, in particular in the form of an elongated stem having respective anchoring ends at the ends 281e, 282e of said first and second support arms 281, 282, in particular of adjustable type, or the length of which can be adjusted, in order to properly adjust the behavior of said shock absorber member 280.

Advantageously, as can be seen in particular from said figures 2, and from 13A to 14B, the anchoring points 280a, 280b of said shock absorber member 280 are provided on the respective first and second support arms 281, 282, between the points, in particular extremes, rigidly linked 281e, 282e of the same first and second arms 281, 282 and the hinging points 281f, 282f, to the corresponding upright 143, 144 of the same first and second arms 281, 282.

With particular advantage, as can be seen in particular from said figures 2, and from 13A to 14B, said mobile support arm 281, which carries the respective wheel 141, 142, has the respective attachment point of said wheel 141, 142, or of the respective support hub 143m, 144m, which is located on the same mobile support arm 281, upstream of the corresponding anchoring point 280a of said shock absorber member 280.

With an advantage, as can be seen in particular from said figure 2, said first and second support arms 281, 282 comprise first and second elongated elements, preferably planiform, 281 ', 281' and 282 ', 282' in particular made in corresponding shaped sheet metal, which are transversely spaced apart and are made integral through corresponding transverse pin means 281 '', 282 '', and in particular comprising corresponding anchoring pins for said shock absorber member 280 and / or for said spacer 283.

Advantageously, as can be seen from the figures, the respective front wheel 141, 142 is rotatably supported by a respective hub 143m, 144m which protrudes towards the outside of the respective upright 143, 144, in particular orthogonal to the respective support arm 281, 281 .

In particular, as can be seen in particular from Figures 2, 14A and 14B, means 29 are provided for braking the respective wheel 141, 142.

Advantageously, as can be seen in particular from Figures 2, 14A and 14B, said means 29 for braking the respective wheel 141, 142 comprise an element 290 for supporting the brake caliper of the corresponding wheel, which is connected, in particular through a corresponding arm 291 to the same upright 143, 144 wheel holder 141, 142, which connecting arm 291 is pivoted to said support 290 of the brake caliper and to said upright, preferably at the same pivot point of said second support arm 282 for said shock absorber member 280, in such a way as to avoid, during braking, the sinking of the upright 143, 144 which carries the same wheel 141, 142.

In particular, in figures 14A and 14B, with the reference P the said brake caliper is marked, which is supported by the element 290, and which cooperates with the disc D to brake the vehicle.

In practice, the caliper support 290 is coaxially mounted on the respective shaft or hub 143m, 144m supporting the corresponding wheel 141, 142 and has a circular body 290a, from which a corresponding stem 290b extends radially, to which it is pivoted, in particular at the respective free end, said arm 291, whose other end is pivoted to the corresponding upright 143, 144 supporting the respective wheel 241, 242.

As can be seen from the said figures, said arm 291 which connects the end of the brake support 290 with the upright has a respective longitudinal axis of extension which is directed forward diverging with respect to the corresponding longitudinal axis of said arm 281 supporting the respective wheel.

Thanks to this configuration, during braking, the caliper support 290, integral with the caliper P, receives a corresponding stress from the brake which, in turn, discharges, through the respective arm 291, onto the corresponding upright 143, 144, and precisely at point 182f of the respective upright to which said arm 291 is pivoted. In particular, this stress generated by braking on the caliper support 290 tends to open the angle between the same caliper support 290 and the corresponding arm 291.

In practice, thanks to this configuration, during braking, said arm 191 pushes upwards on the corresponding upright 143, 144, or acts in an opposite or opposite way, to the rotation which, during braking, said arm 281 tends to undergo, which carries the wheel hub 143m, 144m and therefore the same wheel 141, 142, with respect to the same upright 143, 144, and which, on the other hand, is such as to favor a lowering of the respective upright, and in this way, it counteracts the sinking natural, when braking, of the same pillar with respect to the corresponding wheel.

Advantageously, by varying the position of the pivot point of the arm 291 along the support 290 of the gripper P, the anti-sinking effect can be varied.

In particular, if the pivot point is positioned at 299, as illustrated in the corresponding figures 13A to 14B, i.e. further away from the respective upright, the contrast effect of the sinking is lower, while if said pivot point is positioned in 298, or at 297, or gradually closer to the respective support hub of the wheel of the caliper support 290, said anti-sinking effect increases progressively.

With particular advantage, as can be seen from said figures 1A to 1F, means 31 are provided for traction in advance of the vehicle.

Advantageously, as can be seen from the said figures, said means 31 for traction in advance of the vehicle comprise corresponding actuation pedals 310 and relative motion transmission means, in particular to the rear wheel means 16, which transmission means they preferably comprise a respective chain and corresponding toothed wheels, which however are not particularly illustrated in the attached figures.

With the advantage, as can be seen from the figures, said means 31 for traction in advancement of the vehicle comprise respective motor means 313, in particular in the form of an electric motor, and preferably defining means for assisting the user's pedaling.

Advantageously, power supply means for said motor are provided, in particular in the form of a battery, preferably housed in said support frame 12, especially the oblique element 123 of this.

Advantageously, as can be seen from figures 8A to 8F, in the embodiment in which said articulated connection means 20 are configured to perform a kinematic-type steering, i.e. a steering in which the radii of curvature of the front and rear wheels converge in a single center of curvature C, as particularly illustrated in said figure 8B, said central longitudinal element 210 of said articulated connection means 20 is connected to a corresponding transverse element 231, in particular to the rear transverse element 231, of the same articulated connection means 20, in a movable or sliding way with respect to this, thus allowing to adapt the length of said central longitudinal element 210 to the specific angled configuration of the same front transverse element 211, 212 and rear transverse element 231.

Advantageously, in practice, as can be seen in particular from Figures 8A to 8E, the articulated attachment element 236 of the said central longitudinal element 210 of the said articulated connection means 20 is movable, i.e. it is sliding, with respect to the said rear transverse element 231 to allow said central longitudinal element 210 to adapt the respective length of the same central longitudinal element 210 to the specific angled configuration of the same front transverse element 211, 212 and rear transverse element 231.

In practice, as can be seen in particular from Figures 7A to 8F, said articulated connection means 20 comprise a block 24 for interconnection of said connection means 22, said articulated connection means 20 to said support frame 12, with the same means of articulated connection 20.

Advantageously, as can be seen in particular from Figures 7A to 8F, said interconnection block 24 is fixed to said rear transverse element 231.

Advantageously, as can be seen in particular from Figures 7A to 8E, said interconnection block 24 projects rearwardly from said rear transverse element 231.

Advantageously, as can be seen in particular from Figures 7A to 8E, said interconnection block 24 is in longitudinal correspondence with, or longitudinally aligned with, said intermediate longitudinal element 210, in particular with said articulated attachment element 236 of the same central longitudinal element 210 to the corresponding rear transverse element 231 of the same articulated connection means 20.

Advantageously, as can be seen in particular from Figures 7A to 8F, said interconnection block 24 comprises a rear transverse member 241 longitudinally spaced from said articulated connection means 20, in particular from the same rear transverse element 231 of the same articulated connection means 20 , and of the laterally opposite longitudinal members 222p, 222p, in particular extending from the lateral ends of said transverse member 241, which are fixed to said articulated connection means 20, in particular to the same rear transverse element 231 of the same articulated connection means 20 .

Advantageously, as can be seen in particular from Figures 7A to 8F, said spherical joint 22a of said means 22, for connecting said articulated connection means 20 to said support frame 12, comprise a spherical body 22a ', slidably mounted on said sliding pin 22b integral with said frame 12 of vehicle 10, and a cylindrical body 22a '' mounted slidingly on the spherical outer surface 22a '' 'of said spherical body 22a' and integral with said articulated connection means 20, or with said element rear transversal 231 of the same said articulated connection means 20, in particular integral with said interconnection block 24 of said articulated connection means 20, or to a surface 222c defining a corresponding seat or internal cavity of said interconnection block 24, and in detail provided in said rear transverse member 241 thereof.

Advantageously, as can be seen in particular from Figures 8A to 8F, in the second preferred embodiment of said articulated connection means 20 in which these are configured to perform a kinematic-type steering, i.e. a steering in which the radii of curvature of the front wheels and rear ones converge in a single center of curvature C, as is particularly illustrated in said figure 8B, said means 22 for connecting said articulated connection means 20 to said support frame 12 comprise a bushing 240 which is integral with said central longitudinal element 210 of said articulated connection means 20, in particular to said articulated attachment element 236 of said central longitudinal element 210 of said articulated connection means 20, and which is movable, or sliding, with the same intermediate longitudinal element 210 with respect to said interlinking block 24.

Advantageously, as can be seen from Figures 8A to 8F, said movable or sliding bushing 240 is housed within said rear transverse element 231 and / or said interconnection block 24, in particular within said rear transverse member 241 thereof.

Advantageously, as can be seen from Figures 8A to 8F, said movable or sliding bushing 240 has a front end 240 ', in particular of reduced diameter, which is housed, through the interposition of corresponding sliding means 245, within such a corresponding seat or cavity 231 'of said rear transverse element 231 and a rear end 240' ', in particular of enlarged diameter, which is housed, through the interposition of corresponding sliding means 245, within a seat or cavity 222c of the said interconnection block 24, in particular within said rear transverse member 241 of this interconnection block 24.

Said spherical joint 22a of said means 22 for connection of said articulated connection means 20 to said support frame 12 is housed within the same movable or sliding bushing 240, in particular at the rear end 240 '' thereof, with said external cylindrical surface 22 '' a of the spherical joint 22 which is integral with the internal surface 240 '' 'of the same bushing 240.

In this way, a movable or sliding connection is obtained which allows to vary the longitudinal length of the central longitudinal element, 210 of said articulated connection means 20, and therefore allows to arrange the front transverse element 211, 212 and the rear transverse element 231 in non-parallel condition, allowing implementation of a kinematic-type steering, ie in which the wheels of the vehicle have a single center of rotation, as can be seen from figure 8B.

Advantageously, as can be seen from figures 2 and 15, means 40 are provided for damping the vibration of the respective first and second uprights 143, 144 supporting said first and said second front wheels 141, 142, in particular in the form of damping means with resonant mass.

In this, it is avoided that the fork, or the respective upright element when it is particularly stressed, for example while making a curve, can undergo annoying vibrations.

These vibration damping means can be advantageously used with greater advantage when the bicycle does not have shock-absorbing means between the wheel and the corresponding support upright.

Advantageously, as can be seen in particular from Figure 2, said means 40 for damping the vibration of the respective first and second uprights 143, 144 supporting said first and said second front wheels 141, 142 can be associated with, in particular can be inserted with inside the respective upright and preferably positioned in the upper part of the upright 143, 144.

Advantageously, said means 40 for damping the vibration of the respective first and second uprights 143, 144 supporting said first and said second front wheels 141, 142 comprise an external body 401, in particular which can be coupled with the internal surface of the respective upright 143, 144, in particular preferably insertable from above in the same upright 143, 144.

Advantageously, as can be seen in particular from Figure 15, said means 40 for damping the vibration of the respective first and second uprights 143, 144 supporting said first and said second front wheels 141, 142 comprise an external body 401, defining a respective sliding housing chamber 400 for resonant mass damper means 402 403.

Advantageously, as can be seen in particular from Figure 15, said means 40 for damping the vibration of the respective first and second uprights 143, 144 supporting said first and said second front wheels 141, 142 comprise a fluid 404, in particular in the form of a damping oil 404 of said resonant mass 403.

Advantageously, as can be seen in particular from Figure 15, said damping fluid or oil 404 is housed in corresponding chambers 400 ', 400' ', at opposite ends of said resonant mass 403, and defined within said chamber 400 therefrom. said resonant mass 403, and in particular which separates said housing chamber 400 into two preferably equal parts.

Advantageously, as can be seen in particular from Figure 15, elastic means 405, 405 are provided to maintain said resonant mass 403 in a respective position of equilibrium within said housing chamber 400.

Advantageously, as can be seen in particular from Figure 15, said elastic means 405, 405 acting for maintaining said resonant mass 403 in a respective equilibrium position, in particular provided in correspondence with the center line of the same housing chamber 400, comprise a first and a second opposing springs 405, 405 acting on opposite sides of said resonant mass 403 and positioned in the respective first and second opposing chambers 400 ', 400' 'for said damping fluid, or oil, 404.

Advantageously, as can be seen in particular from Figure 15, said resonant mass 403 has one or more channels 403 'for the passage of said damping fluid, or oil, 404 between said first and second chambers 400', 400 '' for housing the said damping fluid, or oil, 404.

Advantageously, as can be seen in particular from Figure 15, it is also possible to provide means 407 for regulating the flow of said fluid, or oil, for damping 404 between said first and second chambers 200 ', 200' 'for housing the same fluid , or oil, damping 404.

Advantageously, as can be seen in particular from Figure 15, said means 407 for regulating the flow of said fluid, or oil, damping 404 between said first and second chambers 200 ', 200' 'for housing the same fluid, or oil, damping 404 are in the form of means 408 which regulate the flow rate of said damping fluid or oil 404 through the respective crossing channel 403 'provided in said resonant mass 403.

Advantageously, as can be seen in particular from Figure 15, said means 408 which regulate the flow rate of said damping fluid or oil 404 through the respective crossing channel 403 'provided in said resonant mass 403 are in the form of corresponding disk means , in particular in the form of first and second discs 409, 409, in particular provided at the opposite ends of said resonant mass 403, and provided with corresponding holes 410 for the passage of said damping fluid or oil 404 within the corresponding crossing channels 403 ', which disk means 409 are rotatable with respect to said resonant mass 403, in particular being supported in a freely rotatable way by the same resonant mass 403, to modify the width of the access opening within the same crossing channels 403 ', upon impulse of corresponding actuation means, not particularly illustrated in the attached figures.

Advantageously, as can be seen in particular from Figure 15, means 410 are also provided for introducing said damping fluid, or oil, 404 into the respective housing chamber 400 of said means 40 for damping the vibration of the respective first and second uprights 143 , 144 for supporting said first and said second front wheels 141, 142 or damper device 40.

Advantageously, as can be seen in particular from Figure 15, the said external body 401 externally has corresponding O-ring means 410 for the pressure fixing of the same body 401 inside the corresponding first and second uprights 143, 144 supporting the said first and said second front wheels 141, 142.

Advantageously, as can be seen in particular from Figure 15, inside the respective chamber 400 ', 400' ', impact means 412, 412, or bumpers, are also provided for said resonant mass 403 at the ends of said housing chamber 400.

In practice, as is evident, the above illustrated technical characteristics allow, individually or in respective combination, to achieve one or more of the following advantageous results:

- it is possible to have a vehicle or bicycle that has improved stability;

- the vehicle can be easily steered along a desired curve path;

- it is possible to obtain a guide for the vehicle or bicycle that is completely comfortable and easy for the user;

- it is also possible for a person who is not particularly trained to drive this kind of vehicle or bicycle along off-road and / or uneven paths, and especially along mountain paths;

- it is possible, in the event of obstacles or collisions against one of said first and second front wheels, to avoid unloading the longitudinal load on the guide means, or on the bicycle handlebars;

- it allows to obtain an attitude of the vehicle that always remains optimal for the user, both when he has to face cornering sections that require the vehicle to be tilted sideways, and when he has to travel along sections where the wheels are at height levels different from each other, for example when it travels along an inclined slope in a parallel direction;

- in the event of a stop, the vehicle can be kept standing autonomously, possibly even on a respective slope, or the front wheels of the vehicle can be brought as close as possible, so as to minimize the transverse extension of the same vehicle , in view of its location in a convenient environment or on a corresponding means of transport, for example behind a car or on a caravan, or other;

- in any case gentle cushioning is obtained, also active for limited or low-stress compressions for the corresponding shock-absorber organ;

- it is possible to use wheels of any diameter and thickness.

The present invention is susceptible of evident industrial application. The person skilled in the art will also be able to imagine numerous modifications and / or variations to be made to the same invention, while remaining within the scope of the inventive concept, as amply disclosed. Furthermore, the person skilled in the art will be able to imagine further preferred embodiments of the invention which include one or more of the above illustrated characteristics of the preferred embodiment. Furthermore, it must also be understood that all the details of the invention can be replaced by technically equivalent elements.

Claims (63)

CLAIMS 1. Vehicle (10), in particular of a bicycle type, especially consisting of a bicycle, and preferably in the form of a mountain bike, a city bike or the like, of the front (14) and rear wheel vehicles respectively (16), and steering means (18), in particular in the form of a respective handlebar, in particular comprising a respective steering shaft (180) and connected to said front wheel means (14); characterized in that said front wheel means (14) comprise a first (141) and a second (142) wheels side by side and supported by respective first and second uprights (143, 144); by the fact that articulated connection means (20) are provided between said steering means (18), or handlebar, and said first and second front wheels, in particular between said steering shaft (180) and said first and second uprights (143, 144) for supporting said first and said second front wheels (141, 142); and by the fact that means (22) are provided for connecting, in particular for direct connection, of said articulated connection means (20) to said support frame (12) in such a way that, when said steering means (18) , or handlebar, actuate said articulated connection means (20) to correspondingly rotate said first and second front wheels (141, 142), the same articulated connection means (20) rotate said first and second front wheels (141 , 142) maintaining the respective virtual points of contact, or centers of rotation (A, B), on the ground at or near a corresponding axis orthogonal to the longitudinal axis of the vehicle. 2. Vehicle according to claim 1, characterized in that said means (22) for connecting said articulated connection means (20) to said support frame (12) are in the form of means which, in particular when carrying out a corresponding curved path, allow at least one relative movement of said articulated connection means (20) with respect to said support frame (12). 3. Vehicle according to any one of the preceding claims, characterized in that said means (22) for connecting said articulated connection means (20) to said support frame (12) are in the form of means which, in particular when performing a corresponding curved path, allow at least one rotation of the said articulated connection means (20) with respect to the said support frame (12). 4. Vehicle according to any one of the preceding claims, characterized in that said means (22) for connecting said articulated connection means (20) to said support frame (12) are in the form of means which, in particular when performing a corresponding curve path, allow a translation, in particular forwards and backwards, of the same articulated connection means (20) with respect to said support frame (12), in particular said translation having a respective displacement component according to the longitudinal direction to the vehicle (10). 5. Vehicle according to any one of the preceding claims, characterized in that said means (22) for connecting said articulated connection means (20) to said support frame (12) comprise a spherical joint (22a) which allows a corresponding rotation of said articulated connection means (20) with respect to said support frame (12). 6. Vehicle according to any one of the preceding claims, characterized in that said means (22) for connecting said articulated connection means (20) to said support frame (12) comprise a sliding pin (22b), which allows a linear translation movement, in particular according to a direction which comprises a component longitudinal to the vehicle, of the said articulated connection means (20) with respect to the said support frame (12). 7. Vehicle according to claim 7, characterized in that said ball joint (22a) is mounted slidingly on said sliding pin (22b). 8. Vehicle according to any one of the preceding claims, characterized in that said means (22) for connecting said articulated connection means (20) to said support frame (12) are connected, in particular directly connected, or integral, to the said support frame (12), in particular to the oblique element (123) of the same support frame (12), preferably in correspondence with an area of this oblique element (123) of the frame (12) which is close to said tube (121) for said steering shaft (180). Vehicle according to any one of the preceding claims, characterized in that said means (22) for connecting said articulated connection means (20) to said support frame (12) are fixed to said articulated connection means (20) . 10. Vehicle according to any one of the preceding claims, characterized in that said means (22) for connecting said articulated connection means (20) to said support frame (12) comprise an element (221) which is fixed or can be fixed to the said support frame (12), in particular to said oblique element (123) thereof, and an element fixed to said articulated connection means (22); and in particular by the fact that said element (221) fixed, or fixable, to said frame (12) and said element (222) fixed to said articulated connection means (20) are connected to each other through corresponding articulated connection means (22a, 22b). 11. Vehicle according to claim 10, characterized in that said element (221) fixed, or fixable, to said frame (12) and said element (222) fixed to said articulated connection means (20) are connected to each other through said ball joint (22) sliding, forwards and backwards, on said sliding pin (22b). Vehicle according to any one of the preceding claims 10 and 11, characterized in that said fixed element (222) to said articulated connection means (20) has pin means, in particular in the form of first and second pins ( 222p, 222p), which are inserted in corresponding holes (20f, 20f) of said articulated connection means (20). 13. Vehicle according to any one of the preceding claims 10 to 12, characterized in that said element fixed to said articulated connection means (20) is in the form of a respective block (222), in particular transversely elongated, and from which preferably said pin means (222p, 222p) extend, in particular longitudinally or with a longitudinal component. 14. Vehicle according to any one of the preceding claims 10 to 13, characterized in that said element, or block, (222), fixed to said articulated connection means (20) has a respective inner perimeter surface defining a cavity (222c) , in particular through, defining a seat for the housing, with friction or engagement, of the said ball joint (22a) mounted on the said sliding pin (22b), and in particular able to allow the passage through the same sliding pin ( 22b). 15. Vehicle according to claim 14, characterized in that, between the said cavity (222c) defining the seat for the housing, with engagement, of the said ball joint (22a) mounted on the said sliding pin (22b), of the said element, or block, (222), fixed to said articulated connection means (20), a plane rotation element is provided, in particular in the form of a bearing element (222r), which allows said articulated connection means ( 20) between said steering means (18), or handlebar, and said first and second front wheels, in particular between said steering shaft (180) and said first and second uprights (143, 144) supporting said first and said second front wheels (141, 142), to perform a wide angular excursion in both directions of angular rotation. 16. Vehicle according to any one of the preceding claims or according to the pre-characterizing part of claim 1, characterized in that articulated connection means (20) are provided, between said steering means (18), or handlebar, and said first and second front wheels, in particular between said steering shaft (180) and said first and second uprights (143, 144) for supporting said first and said second front wheels that guide (141, 142), which comprise means (21) which guide the movement of said steering shaft (180) and of said first and second uprights (143, 144) which carry the respective first and second front wheels (141, 142), during the lateral inclination movements, or roll, of the vehicle, and / or during the positioning movements at a different level of said first and second front wheels (141, 142). 17. Vehicle according to claim 16, characterized in that said means (21) which guide the movement of said steering shaft (180) and first and second uprights (143, 144) which carry the respective first and second front wheels (141 , 142), during the lateral inclination or roll movements of the vehicle, and / or during the positioning movements at a different level of the said first and second front wheels (141, 142), are in the form of a kinematic system of the type with articulated parallelogram (21). 18. Vehicle according to any one of the preceding claims 16 and 17, characterized in that said means (21) which guide the movement of said steering shaft (180) and of said first and second uprights (143, 144), which carry the respective first and second front wheels (141, 142), comprise an upper transverse rocker arm (211), a lower transverse rocker arm (212) and corresponding perpendicular elements, including a central perpendicular element (210), which comprises, or is integral with, said steering shaft (180), and opposite lateral perpendicular elements (213 and 214), which include, or are integral with, said first and second uprights (143, 144), said transverse rockers (211, 212) and said perpendicular elements (210, 213, 214) being correspondingly connected to each other through corresponding rotation hinges (215). 19. Vehicle according to claim 18, characterized in that said upper transverse rocker (211), lower transverse rocker (212) and perpendicular elements (210, 213, 214), of said means (21) which guide the movement of said shaft steering wheel (180) and said first and second uprights (143, 144) which carry the respective first and second front wheels (141, 142), are connected to each other through corresponding flat rotation hinges (215), preferably defined by corresponding bearing means (215). 20. Vehicle according to any one of the previous claims 18 and 19, characterized in that said hinges (215) for rotation of said upper transverse rocker (211) and lower transverse rocker (212), with respect to the perpendicular elements (210, 213, 214 ), said means (21) which guide the movement of said steering shaft (180) and said first and second uprights (143, 144), are provided between the respective upper or lower transverse rocker arm (211, 212) and a corresponding element (216) for attachment of the respective perpendicular element (210, 212, 213), or respectively for attachment of the respective perpendicular end of the central perpendicular element (210), which comprises, or is integral with, said steering shaft (180 ), and of the opposite lateral perpendicular elements (213 and 214), which comprise, or are integral with, said first and second uprights (143, 144) which respectively carry said first and second front wheels ri (141, 142). 21. Vehicle according to any one of the preceding claims from 18 to 20, characterized in that the respective upper (211) and lower (212) rocker arm has corresponding seats (21s) to receive respective hinges, or bearings, (215) of articulation with said perpendicular elements, or with said central perpendicular element (210), which comprises, or is integral with, said steering shaft (180), and the opposite lateral perpendicular elements (213 and 214), which comprise, or they are integral with said first and second uprights (143, 144) which respectively carry said first and second front wheels (141, 142). 22. Vehicle according to any one of the preceding claims from 18 to 21, characterized in that the attachment element (216) of the respective perpendicular element (210, 212, 213), extending between said upper transverse rocker (211) and rocker lower transversal (212), or respectively of attachment of the central perpendicular element (210), which comprises, or is integral with, said steering shaft (180), and of the opposite lateral perpendicular elements (213 and 214), which comprise, or are integral with said first and second uprights (143, 144) which respectively carry said first and second front wheels (141, 142), is in the form of a body (216) which is fixed to the respective hinge (215) , and in particular it has a respective pin (216a) for insertion into the bearing (215) inserted in the corresponding seat (21s) of the respective rocker arm (211, 212). 23. Vehicle according to any one of the preceding claims or according to the pre-characterizing part of claim 1, characterized in that articulated connection means (20) are provided between said steering means (18), or handlebar, and said first and second front wheels, in particular between said steering shaft (180) and said first and second uprights (143, 144) supporting said first and said second front wheels (141, 142), which comprise means (23 ) which, following the rotation of said steering means, or handlebar (18), provide a corresponding rotation of said first and second front wheels (141, 142), or a corresponding rotation of said first and second uprights (141, 142), which respectively carry the said first and second front wheels (143, 144). 24. Vehicle according to claim 23, characterized in that said means (23), which provide a corresponding rotation of said first and second front wheels (141, 142), arrange said first and second front wheels (141, 142) between of them parallel, or oriented according to the same steering angle. 25. Vehicle according to claim 23, characterized in that said means (23) which provide a corresponding rotation of said first and second front wheels (141, 142) arrange said first and second front wheels (141, 142) between them concentric, or oriented with a different steering angle such as to allow the same first and second front wheels (141, 142) to be able to travel respective circular trajectories which are concentric to each other. 26. Vehicle according to any one of the preceding claims from 23 to 25, characterized in that said means (23) which provide, following the rotation of said steering means, or handlebar (18), a corresponding rotation of said first and second front wheels (141, 142) are in the form of a kinematics of the articulated parallelogram type. 27. Vehicle according to any one of the preceding claims from 23 to 26, characterized in that said means (23) which provide, following the rotation of said steering means, or handlebar (18), a corresponding rotation of said first and second front wheels (141, 142) comprise a corresponding rear transverse element (231) and a front transverse element (211, 212) connected to each other through corresponding longitudinal elements, including a central longitudinal element (210), which is integral with said steering shaft (180), and opposite lateral longitudinal elements (213 and 214), which are integral with said first and second uprights (143, 144), said rear and front transverse elements (231 and 211, 212) and said longitudinal elements (210, 213, 214) being correspondingly connected to each other through corresponding rotation hinges (235). 28. Vehicle according to any one of the preceding claims from 23 to 27, characterized in that said rear transverse element is defined by a corresponding rear rocker element (231); in particular by the fact that said front transverse element (211, 212) is defined by said parallelogram means (21), or comprises said upper rocker (211) and said lower rocker (232). 29. Vehicle according to any one of the preceding claims from 23 to 28, characterized in that said means (22) for connecting said articulated connection means (20) to said support frame (12) are connected, in particular directly connected, to said transverse element, or rocker element, rear (231). 30. Vehicle according to any one of the preceding claims from 23 to 29, characterized in that said rear transverse element (231), front transverse element (211, 212) and the corresponding longitudinal elements (210, 213, 214), of said means (23) which, following the rotation of said steering means, or handlebar (18), provide a corresponding rotation of said first and second front wheels (141, 142), are connected to each other through corresponding flat rotation hinges (235), preferably defined by corresponding bearing means (235). 31. Vehicle according to any one of the preceding claims from 23 to 28, characterized in that perpendicular and longitudinal elements are provided, in particular including a central perpendicular and longitudinal element (210), which is integral with said steering shaft (180) , and opposite lateral perpendicular and longitudinal elements (213 and 214), which are integral with said first and second uprights (143, 144), which jointly connect said upper (211) and lower (212) rockers. , and which connect these upper (211) and lower (212) rockers, in an articulated way to said transverse element or rear rocker (231). 32. Vehicle according to claim 31, characterized in that the respective perpendicular and longitudinal element (210, 213, 214) comprises a front perpendicular rod (25a) a rear perpendicular rod (25b), an upper longitudinal arm (27a) and a lower longitudinal arm (27b), in particular connected in a quadrangle to each other. 33. Vehicle according to any one of the preceding claims 31 and 32, characterized in that the steering shaft (180) and the said first and second uprights (143, 144), which carry the said first and second front wheels (141, 142), are fixed to said upper longitudinal arm (27a) and lower longitudinal arm (27b), respectively of said central perpendicular and longitudinal element (210), and of opposite lateral perpendicular and longitudinal elements (213 and 214). 34. Vehicle according to any one of the preceding claims from 31 to 33, characterized in that the attachment elements (216) which connect said upper transverse rocker (211) and lower transverse rocker (212), to said perpendicular and longitudinal elements (210 , 213, 214), are connected to the respective front perpendicular rods (25a), of the same perpendicular and longitudinal elements (210, 213, 214), in particular at the opposite perpendicular ends of these. 35. Vehicle according to any one of the preceding claims from 31 to 34, characterized in that the attachment elements (216) which connect said upper transverse rocker arm (211) and lower transverse rocker arm (212), to said perpendicular and longitudinal elements (210 , 213, 214), have a respective enlarged part (216b) which defines a respective housing seat (216s) for a corresponding hinge, or bearing, (235) for the articulation of said upper transverse rocker (211) and lower transverse rocker ( 212) with the same front perpendicular rods (25a) of the corresponding perpendicular and longitudinal elements (210, 213, 214); in particular the respective hinge, or bearing, (235) connecting coaxially with the same front perpendicular rod (25a) of the respective perpendicular and longitudinal element (210, 213, 214). 36. Vehicle according to any one of the preceding claims from 31 to 35, characterized in that said rear transverse element, or rocker arm (231) is connected to said perpendicular and longitudinal elements, in particular including a central perpendicular and longitudinal element (210) , which is integral with said steering shaft (180), and opposite lateral perpendicular and longitudinal elements (213 and 214), which are integral with said first and second uprights (143, 144), through respective rotation hinges, in particular planes, or bearings, (215), in particular which rotate with an axis parallel to the rotation hinges (215) of said means (21) which guide the relative movement of said lower transverse rocker (211) and lower transverse rocker (212) with respect to to the same perpendicular and longitudinal elements (210, 213, 214), or with respect to the front perpendicular rods (25a) of these. 37. Vehicle according to any one of the preceding claims from 31 to 36, characterized in that said rear transverse element, or rocker arm (231) is connected to said perpendicular and longitudinal elements (210, 212, 213) through corresponding elements (236 ), which in particular are connected to the respective rotation hinges (215) through a corresponding pin (236p) which fits coaxially into the corresponding seat (23p) of said rear transverse element, or rocker arm (231) and into the hinge (215) in this one. 38. Vehicle according to any one of the preceding claims from 31 to 37, characterized in that the attachment elements (236) which connect said rear transverse element, or rocker arm (231) to said perpendicular and longitudinal elements (210, 213, 214 ), have a respective enlarged part (236b) which defines a respective housing (236s) for a corresponding hinge, or bearing, (235) for the articulation of the transverse element, or rocker arm, rear (231) with the rear perpendicular rods (25b) of the corresponding perpendicular and longitudinal elements (210, 213, 214); in particular the respective hinge, or bearing, (235) is coaxially connected with the same rear perpendicular rod (255) of the respective perpendicular and longitudinal element (210, 213, 214), preferably in correspondence with an intermediate zone of this. 39. Vehicle according to any one of the preceding claims from 31 to 38, characterized in that the elements (216, 236), for attachment between the longitudinal perpendicular elements (210, 213, 214) and the front transverse elements (211, 212) and rear (231), are configured in such a way as to arrange parallel to each other the said central (210) and lateral (213, 214) perpendicular and longitudinal elements for connection between the rear transverse element (231) and the transverse element front wheels (211, 212) in such a way as to arrange by steering said first and second front wheels (141, 142) parallel to each other, or oriented according to the same steering angle. 40. Vehicle according to any one of the preceding claims from 31 to 39, characterized in that the elements (216, 236), for attachment between the longitudinal perpendicular elements (210, 213, 214) and the front transverse elements (211, 212) and rear (231) are configured in such a way as to have converging to each other at a rear point, in particular at the hub of the rear wheel (16), said central (210) and lateral (213) perpendicular and longitudinal elements , 214) for connection between the rear transverse element (231) and the front transverse element (211, 212) in such a way as to arrange, by steering, said first and second front wheels (141, 142) concentric to each other, or oriented with a different steering angle such as to allow the same first and second front wheels (141, 142) to be able to travel along respective circular trajectories which are concentric to each other. 41. Vehicle according to any one of the preceding claims or according to the pre-characterizing part of claim 1, characterized in that means (26) are provided for locking the relative parallel movement of said steering shaft (180) and of said first and second uprights (143, 144) which carry the respective first and second front wheels (141, 142) which are adapted to block the said means (21) which guide the parallel movement of the said steering shaft (180), in particular the movement of the corresponding articulated parallelogram kinematics (21). 42. Vehicle according to claim 41, characterized in that said means (26) for locking the relative parallel movement of said steering shaft (180) and said first and second uprights (143, 144), which carry the respective first and second front wheel (141, 142), means (21) which guide the movement of said steering shaft (180) and of said first and second uprights are connected to the upper transverse rocker (211) and to the lower transverse rocker (212) (143, 144), in such a way as to block the relative movement towards and away from each other between said upper transverse rocker (211) and lower transverse rocker (212). 43. Vehicle according to any one of the preceding claims 41 and 42, characterized in that said means (26) for locking the relative parallel movement of said steering shaft (180) and said first and second uprights (143, 144) which carry the respective first and second front wheels (141, 142) comprise a block (261) fixed to said upper rocker (211) and a block (262) fixed to said lower rocker (212), as well as an intermediate body (260) extending and connected between said block (261) fixed to said upper transverse rocker (211) and said block (262) fixed to said lower rocker (222), which is rotatable with respect to said upper rocker (231) and said lower rocker (232) ), in particular being pivoted (at 2601 and 2602) respectively to said upper transverse rocker (211) and said lower transverse rocker (212). 44. Vehicle according to any one of the preceding claims from 41 to 43, characterized in that said means (26) for locking the relative parallel movement of said steering shaft (180) and first and second uprights (143, 144) which carry the respective first and second front wheels (141, 142) comprise mutual engagement and disengagement means (26p, 26s) which are provided, respectively, on said intermediate body (260) and on said block (261) fixed to said upper transverse rocker (211) and / or on said block (262) fixed to said lower rocker arm (212). 45. Vehicle according to claim 44, characterized in that said mutual engagement and disengagement means, provided respectively on said intermediate body (260) and on said block (261) fixed to said upper transverse rocker arm (211) and / or on said block (262) fixed to said lower rocker arm, comprise pin means (26p) which are inserted into corresponding seat means (26s); in particular by the fact that said pin means (26p) are provided on said intermediate body (260) and said seat means (26s) are provided on said block (261) fixed to said upper transverse rocker arm (211) and / or on said said block (262) fixed to said lower rocker arm (222), preferably said pin means comprise respective first and second pin (26p, 26p), each being able to engage respective seat means (26s, 26s) on said block (261 ) fixed to said upper rocker (211) and on said block (262) fixed to said lower rocker (212); said first and second pin (26p, 26p) extending from said intermediate body (260), preferably along parallel directions, with mutually opposite movements. 46. Vehicle according to claim 45, characterized in that said seat means on said block (261) fixed to said upper transverse rocker (211) and on said block (262) fixed to said lower transverse rocker (212) comprise a respective plurality of distributed seats (26s), in particular angularly distributed, and in particular positioned in relation of simultaneous engagement and disengagement by corresponding pins (26p, 26p) of said intermediate body (260) which are simultaneously activated and deactivated. 47. Vehicle according to any one of the preceding claims 41 to 46, characterized in that said means (26) for locking the relative parallel movement of said steering shaft (180) and first and second uprights (143, 144) which carry the respective first and second front wheels (141, 142) comprise respective means (265) for activating and deactivating the locking condition; in particular by the fact that said locking activation and deactivation means comprise a rotating knob, in particular positioned at the front on said intermediate body (260); preferably said locking activation and deactivation means, or rotating knob, (265) being adapted to move said first and second engagement pin (26p, 26p) between an advanced position outside the, and a retracted position in the respective housing (26'p, 26'p) provided inside said intermediate body (260). 48. Vehicle according to any one of the preceding claims or according to the precharacterizing part of claim 1, characterized in that a first and a second uprights (143, 144) are provided which support, in particular through corresponding cantilevered hubs (143m, 144m) , respectively, a first and a second wheel (141, 142) so that the center of instantaneous rotation, or middle point of support on the ground of the said first and second front wheels (141, 142), is laterally outside with respect to the corresponding first and second uprights (143, 144) for supporting, respectively, said first and said second front wheels (141, 142). 49. Vehicle according to any one of the preceding claims or according to the pre-characterizing part of claim 1, characterized in that damping means (28) are provided between the respective wheel, in particular the respective front wheel (141, 142), and the corresponding support means, or the corresponding upright (143, 144) for supporting the same wheel (141, 142). 50. Vehicle according to claim 49, characterized in that said cushioning means (28) comprise a respective damper member (280), having corresponding first and second anchoring portions (280a, 280b), in particular extreme portions, between which anchoring element (280a, 280b) the shock absorber member (280) is able to compress and expand; said first anchoring portion (280a) being integral with the corresponding wheel (141, 142) and said second anchoring portion (280b) being connected to the means, or upright, (143, 144) for supporting the corresponding wheel (141, 142) in a mobile way and such as to approach said first anchoring portion (280a), integral with the corresponding wheel (141, 142), during the compression steps of said shock absorber member (280). 51. Vehicle according to claim 50, characterized in that said first and second anchoring portions (280a, 280b) of said shock absorber member (280) are supported on corresponding first and second support arms (281, 282), which first and second support arm (281, 282) are connected, in particular are pivoted, to the corresponding means, or upright, (143, 144) for supporting the corresponding wheel (141, 142) and move, in particular they are connected to each other. them, in such a way that said second anchoring portion (280b), connected to the means, or upright, (143, 144) supporting the corresponding wheel (141, 142), approaches said first anchoring portion (280a), integral with the corresponding wheel (141, 142), during the compression phases of said shock absorber member (280). 52. Vehicle according to claim 51, characterized in that said first and second arms (281, 282) which carry the anchoring points (280a, 280b) of said shock-absorbing member are rigidly constrained to each other, in particular at the respective free ends (281e, 282e), preferably through a corresponding spacer element (283), in particular of the adjustable type. 53. Vehicle according to claim 52, characterized in that said anchoring points (280a, 280b) of said shock absorber member (280) are provided between said rigidly constrained points (281e, 282e) of said first and second arms (281, 282) and the hinging points (281f, 282f) to the corresponding upright (143, 144) of the same first and second arm (281, 282); by the fact that the anchoring points (280a, 280b) of said shock absorber member (180) are provided on the respective first and second support arms (281, 282), between the points, in particular extreme, rigidly constrained (281e, 282e) of the same first and second arms (281, 282) and the hinging points (281f, 282f) to the corresponding upright (143, 144) of the same first and second arms (281, 282). 54. Vehicle according to any one of the preceding claims 49 to 53, characterized in that a brake caliper (P) support element (290) is provided which is connected, in particular through a corresponding arm (291) to the same post (143,144) wheel holder (141,142), which connecting arm is pivoted to said support (290) of the brake caliper (P) and to said upright, preferably at the same pivot point of said second support arm (282 ) for said shock absorber member (280), in such a way as to avoid, during braking, the sinking of the upright (143,144) which carries the same wheel (141,142). 55. Vehicle according to any one of the preceding claims or according to the pre-characterizing part of claim 1, characterized in that means (30) are provided for stopping the relative parallel movement of said steering shaft (180) and first and second uprights (143 , 144); in that said means (30) for stopping the relative parallel movement of the relative parallel movement of said steering shaft (180) and first and second uprights (143, 144) are provided between said upper transverse rocker (211) and transverse rocker bottom (212) of said articulated connection means (20), and in particular they are in the form of corresponding pad means (30), protruding perpendicularly from the surface of the respective transverse rocker element (211) which faces the other element transverse rocker arm (212), and able to contact the counter-facing surface of said other transverse rocker element (212). 56. Vehicle according to any one of the preceding claims 27 to 55, characterized in that said central longitudinal element (210) of said articulated connection means (20) is connected to a corresponding transverse element (231), in particular to the transverse element rear (231), of the same articulated connection means (20), in a mobile or sliding way with respect to this, thus allowing to adapt the length of said central longitudinal element (210) to the specific angled configuration of the same front transverse element ( 211, 212) and rear transverse element (231). 57. Vehicle according to any one of the preceding claims from 27 to 56, characterized in that said articulated attachment element (236) of said central longitudinal element (210) of said articulated connection means (20) is movable, i.e. it is sliding, with respect to said rear transverse element (231) to allow said central longitudinal element (210) to adapt the respective length of the same central longitudinal element (210) to the specific angled configuration of the same front transverse element (211, 212) and rear transverse element (231). 58. Vehicle according to any one of the preceding claims 56 and 57, characterized in that said means (22) for connecting said articulated connection means (20) to said support frame (12) comprise a bushing (240) integral with said central longitudinal element (210) of said articulated connection means (20), in particular to said articulated attachment element (236) of said central longitudinal element (210) of said articulated connection means (20), and movable, or sliding , with respect to the intermediate longitudinal element (210) and / or to said interconnection block (24). 59. Vehicle according to claim 58, characterized in that said movable or sliding bush (240) is housed within said rear transverse element (231) and / or said interconnection block (24), in particular within said member posterior transverse (241) of this. 60. Vehicle according to claim 59, characterized in that said movable or sliding bush (240) has a front end (240 '), in particular of reduced diameter, which is housed, through the interposition of corresponding sliding means (245), inside a corresponding seat or cavity (231 ') of the said rear transverse element (231) and a rear end (240' '), in particular of enlarged diameter, which is housed, through the interposition of corresponding means sliding (245), within a seat or cavity (241 ') of said interconnection block (24), in particular within said rear transverse member (241) of this interconnection block (24); said spherical joint (22) of said means (22), for connecting said articulated connection means (20) to said support frame (12) being housed within the same movable or sliding bush (240), in particular in at the rear end (240 '') of this. 61. Vehicle according to any one of the preceding claims or according to the precharacterizing part of claim 1, characterized in that means (40) are provided for damping the vibration of the respective first and second uprights (143, 144) supporting said first and of said second front wheels (141, 142), in particular in the form of resonant mass damping means. 62. Vehicle according to claim 61, characterized in that said means (40) for damping the vibration of the respective first and second uprights (143, 144) supporting said first and said second front wheels (141, 142) can be associated al, in particular which can be inserted inside the respective upright and preferably positioned in the upper part of the same upright (143, 144). 63. Vehicle characterized respectively in that it is made according to any one of the preceding claims and / or as described and illustrated with reference to the attached drawings.