ITRM20000453A1 - THREE-WHEEL BICYCLE ALIGNED BETWEEN THEM WITH THE FRONT WHEEL AND REAR STEERING WHEEL AND THE PEDALS LOCATED REAR TO THE WHEEL - Google Patents

Description

Description of the BREV.INV.IND. by title

Three-wheeled bicycle aligned with each other with the front wheel and rear wheel steered and the pedals located behind the non-steered drive center wheel. A transmission system that uses cables and pulleys manages the steering of the wheels.

Analysis of the prior state of the art before innovation Today there are bicycles of varying sizes and characteristics. The essential structure of the bicycle, common to all models, provides for a metal frame on which the saddle and the two wheels are grafted (the rear one is not steering, the front one is steering); the driver is placed between the front wheel and the rear wheel of the bicycle. The section of the tube and the material of which the frame is made are variable. The brake controls are located on the handlebar, acting on the rims of both wheels. The rotation of the cranks, to which the pedals are attached, is transmitted to the chain through a sprocket called multiply, the chain in turn transmits the rotation motion to the rear wheel through a sprocket. Today, most bicycles have a mechanism that varies the stroke of the pedals allowing the change of speed .:

Objective that innovation intends to achieve

The goal is to obtain an optimal "customizable" driving position to increase the "thrust power" on the pedals "favoring the psycho-physical action" of the driver and maximizing the "stability and control" of the vehicle, especially in high speed curve.

Analysis of the result achieved with examples of obtaining the invention One of the fundamental characteristics of the vehicle in question, unlike the normal bicycle previously described, is that of having three wheels which will be identified as: front, central and rear wheel. “Maximum pushing power on the pedals”. Taking as an example a sprinter in the starting phase during, the initial shot, in its maximum expression of power, bringing it back on a mechanical pedal vehicle, with three wheels, we get the vehicle described below.

The crown gear c1 (Tab. L) and the crank arm where the pedals are mounted are located behind the central driving wheel r2 (Tab. I). The angle (alpha) (Tab. 2) that is formed between the horizontal axis al (Tab. 2), at the height of the toothed crown of the pedals cl (Tab. 2), and the axis a2 (Tab. 2) ) which starts from the center of the crown of the pedals cl (Tab.2) and reaches the center of the saddle si (Tab.2) determines the optimal position of the rider. This position allows him to express the maximum pushing power on the pedals, thanks to the maximum extension of the leg during the push and therefore to a more "natural" and "profitable" movement of the limbs in terms of effort / benefit. Contrary to the classic position taken on a normal bicycle, where i! driver is located between the front wheel and the rear wheel, on the vehicle in question the driver gl (Table 1) is located above the central driving wheel r2 (Table 1) and precisely with his feet on the pedals pi (Table 1) located behind the central driving wheel r2 (Table l) and with the hands on the handlebar m1 (Table 1) located in front of the central wheel r2 (Table 1). “Optimal personalized position”. The means described allows you to find an "optimal and customizable position" based on the

to the type of route. Thanks to the saddle s1 (Tab. 1) which can be adjusted in height and moved horizontally, between the front wheel r1 (Tab. L) and the rear wheel r3 (Tab. L), the optimal position can be found in order to express the maximum pushing power on the pedals.

“Stability and control of the vehicle”. Unlike normal bicycles where the driver's body and the crown with the pedals are positioned between the front wheel and the rear wheel, on the vehicle in question, as we have previously mentioned, the driver's body gl (Table l) is positioned above the central driving wheel r2 (Table l). The increase in the thrust force on the pedals involves a particular position of the driver by repositioning the saddle si (Tab. 2) with respect to the crown gear cl (Tab. 2), This operation involves the reduction of the angle (alpha) (Tab .2) and allows the driver to assume a position of "sprint at the start", which allows him to extend his limbs to the maximum during the push. Whatever position is assumed, the driver remains on top of the central driving wheel r2 (Table 2) which together with the front wheel r1 (Table 2) and the rear wheel r3 (Table 2), ensure considerable balance and stability especially in the governability of the front of the vehicle.

“Maximum cornering stability at high speeds”. Another fundamental feature of the bicycle in question are the three wheels ri r2 r3 (Table 3) which are aligned with each other in rectilinear motion (see fi TAV.3). The front wheel ri (Tab.3) and the rear wheel r3 (Tab.3) are steering (see f2 Tab.3), and their forks are connected respectively to the pulleys d2 and di (Tab.3) which are part of the transmission system t1 (Table 3). The steel cables si and s2 (Tab.3) crossing, connect the pulleys d 1 and d2 (Tab.3) to each other (see f4 Tab.3) and the ends of the aforementioned cables are “anchored” to the pulleys. Therefore, assuming the steering of the front wheel r1 (Table 3) through the rotation of the pulley d2 (Table 3) in the direction hO towards hi (Table 3), a rotation of the pulley d i (Table 3) follows in the direction eO towards e1, vice versa if the pulley d2 (Tab.3) rotates in the direction hO towards h2 (Tav3) follows a rotation of the pulley (Tab.3) in the direction eO towards e2. To obtain the movements described above, a pulley must rotate in the opposite direction to the other, this justifies the cables si and s2 (Table 3) that cross each other. The direction (central, steering to the right, steering to the left) and the angle of the steering of the rear wheel r3 (Table 3) depend on the steering of the front wheel ri (Table 3) and the diameter of the pulleys of e d2 (Table .3). The steering of the front wheel r1 (Table 3) is defined and controlled directly by the driver. The rear wheel r3 (Table 3) helps to define the driveability sensation of the vehicle, both in rectilinear motion and in stationary motion when cornering. The central drive wheel r2 (Table 3) is not steering and can be equipped with a toothed sprocket (mechanical gearbox used in common racing bicycles) connected by means of the chain to the crown gear of the pedals c1 (Table 3) located behind the central driving wheel just described.

Claims (4)

Claims 1) Three-wheeled bicycle. The wheels ri r2 r3 (Table 3), in rectilinear motion, are aligned with each other (see fi Table 3). 2) The front wheel rl (Table 3) and the rear wheel r3 (Table 3) are steering, the central wheel r2 (Table 3) is not steering (see f2 Table 3). 3) The pedals p 1 (Tab. 1) are located behind the central drive wheel r2 (Tab. I) and precisely between the rear wheel r3 (Tab. I) and the central drive wheel r2 (Tab. 1). 4) The driver's body gl (Tav, I) is placed above the central drive wheel r2 (Tab. 1), and precisely with the feet on the pedals pi (Tab. 1) located behind the central drive wheel r2 (Tab. 1) ) and hands on the handlebar m1 (Table 1) located in front of the central driving wheel r2 (Table 1), 5) The angle (alpha) (Table 2) is between 0 and 90 °. The angle (alpha) (Table 2) is included between the horizontal axis a l (Table 2), at the height of the center of the crown gear cl (Table 2), and the axis a2 (Table 2) which starts from the center of the crown gear cl (Tab. 2) and reaches the center of the saddle s1 (Tab. 2). 6) Optimization of the driver's position through the vertical and horizontal adjustment of the saddle s1 (Tab. 1) between the front wheel ri (Tab.1) and the rear wheel r3 (Tab.1). The position of the saddle (Table 1) is fundamental for the definition of the angle (alpha) (Table 2). 7) Transmission system t1 (Table 3) which uses steel cables and pulleys, manages the steering of the rear wheel r3 (Table 3) according to the steering of the front wheel ri (Table 3), The front wheel r1 ( Tab. 3) and the rear wheel r3 (Tab. 3) are steering (see f2 Tab. 3), and their forks are connected respectively to pulleys d2 and d1 (Tab. 3) which are part of the transmission system tl (Tab. 3). Table 3). Two steel cables whose ends are “anchored” to the pulleys allow the rotation of the pulley d i according to the rotation of the pulley d2 (see f4 Tab.3).