BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a vehicle, particularly to a swingable and speedable freewheeled vehicle.
2. Description of the Related Art
FIGS. 1 and 2 show “An Improvement on A Freewheeled Vehicle” issued by an R.O.C. Patent No. M322912. The freewheeled vehicle 1 comprises a frame 11, a fixture 12 pivotally disposed on one end of the frame 11, a steering stem 13 disposed on the fixture 12, front and rear wheels 14, 15 respectively installed on the frame 11. Wherein, the frame 11 includes two holding rods 111 respectively extended from the fixture 12, and a pedal 112 individually installed on each holding rod 111. Each of the holding rods 111 has a fork member 113 connected to the rear wheel 14, and a spindle 114 pivoted on the holding rod 111 and connected to the fork member 113. Accordingly, when driver steps on the pedals 112 and swings his body for driving the fork member 113 to sway rightward and leftward, the rear wheels 15 would thence rotate to march the freewheeled vehicle 1 forward.
However, problems and difficulties may encounter with the above conventional structures as follows:
- 1. While marching the freewheeled vehicle 1, the rear wheels 14 would be accordingly swung. Thus, if drivers want to speed up the vehicle, they have to exert their swinging strength on the rear wheels 14 harder. However, in the same time, drivers would readily lose their balance on the freewheeled vehicle 1 because of the casual or improper strength exertion. As a result, people would raise a safety concern about the conventional freewheeled vehicle 1. Wherein, drivers could not enjoy their driving due to the unstable balance; therefore, drivers would adversely drop their interests on the freewheeled vehicle 1, and an exercising effect would be dwindled.
- 2. When the freewheeled vehicle 1 is not driven, the fork member 113 and the spindle 114 are not structurally constricted. Therefore, if users move the freewheeled vehicle 1 backwards, the fork member 113 easily slants aside in time of moving. Whereby, the rear wheels 15 and the front wheel 14 would not have a consistent running direction, which results in an inconvenient moving manner.
SUMMARY OF THE INVENTION
The object of the present invention is to provide a swingable and speedable freewheeled vehicle, which could be readily speeded up to promote the fun of using and the effect of exercising.
The swingable and speedable freewheeled vehicle in accordance with the present invention comprises a frame, a fixture pivotally disposed on one end of the frame, a steering stem fixed to the fixture, front and rear wheels respectively installed to the frame and the fixture, and swingable devices respectively installed between the frame and the rear wheels. Wherein, each swingable device includes a guiding track fixed to a seated member, a spindle pivoted on the seated member, and a sliding assembly for sliding on the guiding track. Thereby, while swingably driving the freewheeled vehicle, a sliding stem of the sliding assembly would slide along the guiding track to perform a high-low displacement. Accordingly, a variation of distance between the ground and the frame would provide the freewheeled vehicle with an inertia force during the sliding. Thus, drivers employ a pushing power from the inertia force to readily and speedily motivate the freewheeled vehicle forwards so as to increase their using interests and exercising effect.
An object of the invention is to provide a swingable and speedable freewheeled vehicle that comprises a frame, a fixture pivotally disposed on one end of the frame, a steering stem disposed on the fixture, front and rear wheels respectively fixed to the frame and the fixture, and swingable devices respectively installed between the frame and the rear wheels.
Wherein, two holding rods are respectively extended from the fixture, and a seated member is fixed to each end of the holding rods. Further, a pedal is mounted on each of the holding rods, and two handlebars are formed on the steering stem for controlling a marching direction of the vehicle;
Characterized in that each of the swingable devices includes a guiding track fixed to the seated member, a spindle pivoted on the seated member, and a sliding assembly for sliding on the guiding track; wherein, the sliding assembly has a sliding stem with one end thereof pivoted on the spindle and with the other end thereof pivoted on the rear wheel as well as a rotary member penetrated by the sliding stem. The rotary member props against the guiding track and sliding thereon.
Preferably, the guiding track is disposed inclined with respect to the ground.
Preferably, a guiding groove is defined on the rotary member corresponding to the sliding stem for the rotary member to stably prop against the guiding track.
Preferably, the front and rear wheels are replaced by a set of ice skates.
Preferably, a power is installed on the front wheel for which to be automatically driven.
Preferably, the front and rear wheels are replaced by a set of ice skates.
Preferably, a power is installed on the front wheel for which to be automatically driven.
The advantages of the present invention over the known prior arts will become more apparent to those of ordinary skilled in the art upon reading the following descriptions in junction with the accompanying drawings.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a schematic view showing the conventional freewheeled vehicle;
FIG. 2 is a schematic view showing FIG. 1 in using;
FIG. 3 is a perspective view showing a first preferred embodiment of the present invention;
FIG. 4 is an enlarged view of elements in the first embodiment;
FIG. 5 is a top view of the elements in the first embodiment;
FIG. 6 is a schematic view showing the first embodiment in using;
FIG. 7 is a schematic view showing the first embodiment in using;
FIG. 8 is a perspective view showing a second preferred embodiment of the present invention; and
FIG. 9 is a perspective view showing a third preferred embodiment of the present invention.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
FIG. 3 shows a first preferred embodiment of the present invention, a freewheeled vehicle 3 allowable for readily swinging and speeding up, comprising a frame 31, a fixture 32 pivotally disposed on one end of the frame 31, a steering stem 33 fixed to the fixture 32, front and rear wheels 34, 35 respectively installed on the frame 31 and the fixture 32, and swingable devices 4 respectively disposed between the frame 31 and the rear wheels 35. Wherein, the frame 31 has two holding rods 313 respectively extended from the fixture 32, a seated member 313 fixed to an end of each holding rod 311, and a pedal 312 installed on each holding rod 311. In addition, the steering stem 33 forms two handlebars thereon for controlling the marching direction of the front wheel 34.
Accompanying with FIGS. 3 and 4, the swingable device 4 includes a guiding track 41 fixed to the seated member 313, a spindle 42 pivoted on the seated member 313, and a sliding assembly 43 for sliding along the guiding track 41. Substantially, the sliding assembly 43 includes a sliding stem 431 with its one end pivoted on the spindle 42 and with its other end pivoted on the rear wheel 35, and a rotary member 432 penetrated by the sliding stem 431. The rotary member 432 props against the guiding track 41 for sliding thereon. Additionally, the guiding track 41 is preferably structured to be inclined with respect to the ground. Herein, the guiding track 41 further has an upmost point A defined thereon and two lowest points B respectively defined at two sides of the guiding track 41. Accordingly, while a vertical distance D between the upmost point A and the lowest points B is larger, a greater sliding inertia force and motive force impinging on the sliding assembly 43 would be brought about. Whereby, the freewheeled vehicle 3 would sustain a preferable pushing force. Further, a guiding groove 4321 is preferably defined on the rotary member 432 corresponding to the sliding stem 431, so that the rotary member 432 could more firmly prop against and slide on the guiding track 41.
Referring to FIGS. 3 and 5, while the freewheeled vehicle 3 is placed on the ground, a balance between the weight of the frame 31 and the rear wheels 35 allows the rotary member 432 to justly locate on the upmost point A of the guiding track 41. At the same time, the rear wheels 35 and the front wheel 34 have a coherent placing manner. Accordingly, if drivers tend to move the freewheeled vehicle 3, the rear wheels 35 would not go aside, which favorably prevents an inconvenient motion. Further referring to FIGS. 6 and 7, in using, drivers stand on the pedals 312 with their swinging motions to carry the holding rods 311 moving leftwards and rightwards reciprocally. Concurrently, the rotary member 432 would slide forth and backward between the two lowest points B on the guiding track 41. When the rotary member 432 reaches one of the lowest points B and the driver keeps swinging, the rotary member 432 would further slide toward the other lowest point B for concurrently allowing the rear wheels 35 to sway with a certain angle. Notably, during the swaying of the rear wheels 35, a torsion would be accordingly generated between the ground and the vehicle. Concomitantly, upon the rotary member 432 slides over the upmost point A toward the lowest points B, a certain strength is generated for driving the rotary member 432 to move from a higher place to a lower place and accordingly varying the distance d between the frame 31 and the ground. Thus, by means of the certain strength providing a pushing force and the rotary member 432 providing a swingably moving force, the freewheeled vehicle 3 could be stably marched.
Still further, in time of swinging, the rotary member 432 would slide from either lowest point B toward the upmost point A on the guiding track 41. Concurrently, the holding rods 311 would be accordingly lifted along with the sliding of the sliding stem 431 on the guiding track 41. Thereby, a distance d between the holding rods 311 would be further away from the ground accordingly so as to enhance a moving force thereof. Whereas, when the rotary member 432 slides to the lowest point B, the motion of the rotary member 432 would be restricted. Wherein, since the rear wheels 35 and the holding rods 311 still sustain the strength exerted from the driver, the weight of the driver would thence turn into a returning force for sliding from the lowest point B toward the upmost point the rotary member 432 A on the guiding track 41. Herein, when the rotary member 432 reaches the upmost point A on the guiding track 41, an inertia force would be accumulated, which leads to the rotary member 432 successively moving along the guiding track 41 toward the other lowest point B. Therefore, drivers could employ the inertia force to easily and swiftly carry the freewheeled vehicle 3 frontward, thereby increasing the riding enjoyment and exercising effect. Additionally, the strength exerted by the driver on the vehicle could further reinforce the inertia force of the rotary member 432 sliding on the guiding track 41, so that the driver employs his strength to cooperate with the swing direction of the vehicle for achieving a speedy movement, and the occurrence of unstable balance during the acceleration would be avoided to promote the using safety.
Referring to FIG. 8 shows a second preferred embodiment of the present invention. The freewheeled vehicle 3 still comprises the frame 31, the fixture 32, the steering stem 33, the front and rear wheels 34, 35, and the swingable devices 4. Particularly, a power 44 connected to the front wheel 34 is installed on the frame 31 for assisting the automatic rotation of the front wheel 34. Accordingly, the freewheeled vehicle 3 could be driven forward without self-swinging for promoting the interest in riding the freewheeled vehicle. As it should be, when drivers manually exert their strength to swing the freewheeled vehicle 3 and concurrently drive the same via the power 44, an easier and speedy riding with amusement could be attained.
Referring to FIG. 9 shows a third preferred embodiment of the present invention. The similar elements and correlations to those of the first embodiment are herein omitted. Wherein, the front and rear wheels 34, 35 in FIG. 3 could be replaced by ice skates 45. Thereby, the freewheeled vehicle 3 could be skied on any frozen ground for enjoying ice-skating indoors and outdoors. Therefore, drivers could slide the freewheeled vehicle 3 unlimitedly. Moreover, the using safety, amusement effect and application interests are all preferably promoted.
To sum up, the present invention takes advantage of the swingable devices to generate a suitable inertia force in time of the sliding stem of the sliding assembly moving along the guiding track via drivers stepping and swinging the freewheeled vehicle. Accordingly, drivers utilize the inertia force to perform a high-low displacement of the frame and allow a variation of distance between the frame and the ground, so that the freewheeled vehicle could be readily and swiftly moved forward to increase the using interests and exercising effects. The incident of inclination of the vehicle due to the unstable balance could also be avoided to increase the using safety.
While we have shown and described the embodiment in accordance with the present invention, it should be clear to those skilled in the art that further embodiments may be made without departing from the scope of the present invention.
Patent Application
20110127739
