Transmission system for electric bicycle, provided with two modes of use, placed internally and tangent with respect to the spoke-less wheel on which it is

Abstract

A transmission system 1, suitable for an electric bicycle, comprising an electric motor 6 that drives a gearing unit 4 which in turn is coupled to, and drives, a spokeless wheel 5, the gearing unit 4 being placed internally and tangentially with respect to the internal diameter of the wheel 5. The system 1 is connected to the load-bearing frame 16 of a bicycle by a support frame 7 that houses the components. The support frame 7 has an internal sliding support element 8 and a stationing element and coupling / decoupling lever (9, Fig. 15) which allow the connection or disconnection of the gears unit 4 from the wheel 5 in order to allow two different uses of the invention: an "on-road mode" which allows a cyclist to use the bicycle to move from one place to another, and a "static training mode" which allows the bicycle to be used as a static device to carry out training.

Description

TRANSMISSION SYSTEM FOR ELECTRIC BICYCLE, PROVIDED WITH TWO MODES OF USE, PLACED INTERNALLY AND TANGENT WITH RESPECT TO THE SPOKE-LESS WHEEL ON WHICH IT IS CAPABLE OF ACTING TECHNICAL FIELD OF INVENTION

[0001] The present invention relates to a drive power transmission system for an electric bicycle with assisted pedalling (1), comprising a gears unit (4), connected to an electric motor (6), coupled to a spokes-less wheel (5) on which it is able to act and placed internally and tangentially with respect to the inner diameter of said wheel. The system is connected to the entire load-bearing frame of the bicycle (16) by means of a support frame (7) capable of housing and holding the component parts together.

[0002] The transmission system uses the pedal-crank unit (2) and elements of the crank axle (3) to transmit the driving force supplied by the cyclist to the gears unit (4) which, due to its conformation and location on the support frame (7) anchored to the bicycle support frame (16) by means of the anchors (17) or other means of connection is able to act directly on the toothed inner part or grip contact (38) of the spokes-less wheel (5) on which it is placed and is also provided, in order to assist the propulsion, with an electric motor (6), connected to a battery (10) by means of an control and setting unit (11), which acts directly on said gears unit (4).

[0003] The support frame (7) is equipped with an internal sliding support element (8) and a stationing element and coupling / decoupling lever (9) which allow the connection or disconnection of the gears unit (4) from the spokes-less wheel (5) in order to allow two different uses of the invention; the first one defined as "on-road mode" which allows the use of the invention as an electric bicycle to enable the cyclist to move from one place to another place, the second one defined as "static training mode" which allows the use of the invention as a static device to carry out training indoors or in confined spaces or outdoors but without moving. PRIOR ART

[0004] Electric bicycles in the known state of the art are equipped with motion transmission systems that are based on traditional frames that have a defined geometry, the most common of which is the lozenge frame, on which equipment and devices are fitted to enable assisted pedalling.

[0005] The state of the art implies that: - [0005.1] the positioning of the pedal / crank / chain gears unit traditionally takes place in a position outside the rear wheel fitted with spokes, with an anchorage to a part of the frame intermediate between the two wheels, making the chain or gear necessary for the transmission of the driving force to the hub of said rear wheel. The presence and position of the aforementioned unit entails constructional constraints that determine the need to position the other elements making up the transmission system at different points of the bicycle. For example, in some very common types the electric motor, known as a roller or friction motor, is positioned near the tyre, which can lead to problems of adherence of the device due to dust and therefore limited efficiency; in other cases the motor is placed on the hub of the rear or front wheel and this determines the need to prepare adequate electrical connections between said motor, the control unit and the battery along various parts of the bicycle frame. - [0005.2] the positioning of the pedal / crank / gears unit, even in the case of non-traditional transmission systems and applied to spokeless wheels, is in any case in an intermediate position between the two wheels, both for practical reasons related to the transmission ratio, and for ergonomic and sometimes even aesthetic reasons. In this case, both bicycle frames and spokeless wheels have slenderness and 'design' characteristics that are poorly suited to the real needs of robustness and stability of a frame or wheels designed for real use. This results in the need to resort to extremely resistant and high-performance, and therefore very expensive, materials. Also in this case, the presence and position of the said pedal / crank / gears unit entails constructional constraints that determine the need to position the other elements constituting the transmission system in different points of the bicycle with a consequent increase in complexity; - [0005.3] the simple positioning of a spur gear inside the spokes-less wheel does not allow the transmission to function properly due to an unfavourable gear ratio and is difficult to position because it requires a suitable support to allow a reliable and robust connection between the transmission gear and the wheel.

[0006] With regard to the above, it can be pointed out that the obligatory positioning of the aforementioned pedal, crank, chainring unit in an intermediate position between the two wheels of the bicycle limits the possibility of concentrating the components of the transmission system in a given area of the bicycle, and consequently the possibility of introducing modifications or further technical and functional solutions to reduce the volumes involved, the number of moving parts, the extension of the electrical connections, and the complexity and rigidity of the transmission system. In other words, the possibility of introducing innovations to the geometry of the entire bicycle structure is limited. For example, such a positioning defines a limit for the height of the bicycle frame from the ground, which constitutes another constraint in the aforementioned bicycle geometry.

[0007] In addition, conventional electric bicycles are not equipped with systems, as an integral part of the entire drive system, which allow the same bicycle to be used for static training activities, for example as is the case when using an exercise bike into home, and which allow the batteries supplied with the same bicycle to be recharged by the muscle power of the person training. In order to enable the aforementioned static training, it is necessary to have additional devices that allow the rotation of the drive wheel or part of it or its gears on the spot, with the consequent increase in the overall complexity of using the electric bicycle system. However, even the numerous concept bicycles on the web do not have this dual feature that can be exercised in the manner described above.

[0008] With regard to the art known in the scope of this application, the references are as follows: DI) CN102431383A - SPOKE-FREE HOLLOW MIDDLE SHAFT BICYCLE; D2) CN204452777U - BICYCLE WITH HOLLOW WHEELS (Utility model link to DI); D3) US38617138- DIRECT TRANSMISSION SYSTEM FOR BICYCLES; D4) CN204264374U - NOVEL ELECTRIC BICYCLE (Utility model); D5) US698732461- ELECTRIC GENERATING CONVERTIBLE BICYCLE; Although the structural features of the above-described devices present, at first glance, similarities with the present invention, they differ in certain substantial aspects. These differences, which will be described in more detail below, are essential for the effective use of the invention and admit advantages not available with the mentioned devices. In fact, in general, the references identified above are all related to solutions which provide for the presence of the pedal, crank, chainring unit in an intermediate position between the two wheels, but none focus on the possibility that this transmission system may instead be located on the inside of the spokes-less wheel. Moreover, none of the above-mentioned references present arrangements that would also allow static use for training, indoors or in confined spaces or the open air, of the electric bicycle without its rear wheel being rotated.

[0009] In particular, DI, which could be considered the closest known art to the subject of the present question, describes a bicycle equipped with spokes-less wheels, the functioning of which is linked to its particular conformation, but the said pedal, crank, chainring unit continues to be positioned in an intermediate position between the two wheels and only thanks to the presence of further gears connected to it is able to reach the rear wheel in its inner part. This results in the absence of any real direct action on the rear wheel and thus the absence of any real simplification of the transmission system. Moreover, the stated direct action, without the use of additional devices or gears and without the aid of an electric motor, would result in an excessively unfavourable transmission ratio and therefore decidedly unacceptable. Furthermore, DI does not allow the possibility of static training.

[0010] D2 constitutes a utility model of the DI.

[0011] D3 identifies a system of direct transmission of the driving force by means of a pedal, crank, chainring unit positioned in an intermediate position between the two wheels and acting on the hub of the rear wheel via a drive shaft with the difficulties and complexities that such a system entails. Furthermore, D3 does not allow the possibility of static training.

[0012] D4 defines an electric bicycle with a rear wheel unit comprising a rear wheel guard and a spoke-less rear wheel, located on the inner side of the aforementioned wheel guard, on which a battery-powered magnetic ring drives the movement. Also in this case, the pedal, crank, chainring unit is placed in an intermediate position between the two wheels. Furthermore, D4 does not allow the possibility of training.

[0013] D5 defines a conventional bicycle equipped with a generator whose drive shaft is connected to a roller which is adapted to exert friction with the outer surface of the rear tyre of said bicycle. Rotation of the rear wheel is possible by positioning the bicycle on a support that allows the wheel to be separated from the ground. D5 differs from the found one in that it is also a traditional type of bicycle and the pedal, crank, and chainring unit is positioned in an intermediate position between the two wheels. In addition, D5 only allows the bicycle to be used statically by means of a support which raises the rear wheel from the ground, allowing it to rotate, and which in turn rotates the electric generator; the present invention, on the other hand, does not involve the rotation of the wheel on which the transmission system acts during its static use, as this is disconnected from it. Therefore, the ways in which DC electric current is generated to recharge the battery provided or external consumers are different. Furthermore, the present invention possesses a level of compactness and concentration of all component parts in a single device that D5 does not have. TECHNICAL PROBLEM TO BE SOLVED / SUMMARY OF THE INVENTION

[0014] In this context, the technical task at the basis of the present invention is to propose a transmission system coupled and acting internally to the spokes-less wheel on which it acts that overcomes the drawbacks of the known technique mentioned above and that increases the usefulness of this type of bicycle by providing the possibility of having two modes of use, on-road mode and static training mode, and to develop further possibilities of use and innovative solutions in the field of mobility on Light Electric Vehicles (LEV) and in the field of exercise bikes coupled to electric motors that can also be used as electric power generators. The invention proposes, by means of its conformation and positioning of the equipment, to concentrate the essential elements of the transmission system for an electric bicycle in a specific area inside the spokes-less wheel on which it acts, optimising the number of elements and parts comprising said system, lowering the centre of gravity and making the riding of said electric bicycle safer and more comfortable, thereby facilitating its use. Moreover, the invention allows, thanks to the possibility of disconnecting the gears unit (4) from the spokes-less wheel (5) on which it acts, a use for static training with the possibility of generating electric energy. In fact, the particular conformation and position of the gears unit (4) coupled and acting internally to a spokes-less wheel (5), together with other functional solutions linked to them, such as the conformation of the support frame (7) and the equipment associated with it, in particular the sliding support element (8) and the stationing element and coupling / decoupling lever (9) used to select the mode of use, give this transmission system for electric bicycles an innovative, distinctive and original character compared to the known state of the art.

[0015] The invention was therefore conceived and created to simplify and make the drive system more efficient, to overcome certain positioning constraints of the bicycle components related to the known technique and to allow the concentration of all the essential parts making up the drive system of an electric bicycle in a well-defined area inside the spokes-less wheel on which it acts in order to lower the centre of gravity and free up other areas of the electric bicycle for the positioning of further technological systems or devices or simply to allow the development of new design forms free from traditional geometries. Furthermore, the invention allows the same bicycle to be used for static training activities, indoors or in confined or open-air environments, with the possibility of charging the supplied battery and / or other batteries or external devices / systems.

[0016] "TRANSMISSION SYSTEM FOR ELECTRIC BICYCLE (1), PROVIDED WITH TWO MODES OF USE, PLACED INTERNALLY AND TANGENT WITH RESPECT TO THE SPOKE-LESS WHEEL ON WHICH IT IS CAPABLE OF ACTING" therefore has a number of advantages over the solution proposed in the aforementioned reference publications of the known art in that: [0016.1] The planetary gearing allows for greater pedalling efficiency. In fact, said planetary gearing, as an essential element of the gears unit (4) as described below, is in particular equipped with a crown wheel with internal toothing (23) locked, a pinion carrier (24) conductor and a pinion (26) driven rotating in the same direction as the pinion carrier, resulting in an increase in the speed of rotation of said output pinion with respect to the speed of rotation of the input pinion carrier to which the pedals are connected. This configuration produces an increase in the gear ratio equal to 1 + (Nr / Ns), where Nr is the number of teeth of the sprocket and Ns is the number of teeth of the pinion. Therefore, the application of a force on the pedal results in an advantageous gear ratio on the wheel (5), which results in more efficient pedalling. Furthermore, due to the geometry of the support frame (7), although for the sake of simplicity the drawings show only one, the number of such planetary gears can be greater than one, and in such a case the gears can be placed in series with further pedalling efficiency. [0016.2] The effort / torque sensor on the pedals (44), located on the electric motor (6), connected to the computerised regulation and control unit (11) and both combined with a fixed gear ratio, are able to determine a modulation of the power delivered by the motor commensurate with the real needs of the cyclist at each stage of the route being travelled and with the settings entered by the cyclist by means of the regulation controller (13), helping to reduce the number of elements that make up the transmission system, its complexity, size and overall weight. In fact, with the effort / torque sensor, which is a device sensitive to the force impressed on the pedals by the cyclist, it is sufficient to exert slight pressure on the pedal for the motor (6) to be started, even from a standstill. While the control and setting unit (11) balances the engagement of the electric propulsion in a progressive manner, right from the start of pedalling, without the need for further mechanisms to change the gear, which in the invention is fixed. [0016.3] The concentration of all the main components of the drive system in a specific area of the bicycle allows space to be freed up in other areas of the bicycle for better weight balance and a lowered centre of gravity in order to increase the safety of use of the electric bicycle and to allow for the future development of possible innovations and / or modifications to the geometry of the bicycle and / or new forms of design. An example of a possible use of the present invention could be its application on 'cargo' bicycles for transporting materials. [0016.4] The possibility of coupling / decoupling the gears unit (4) from the spoke-less wheel (5) on which it acts by means of an action exerted by the cyclist on the stationing element and coupling / decoupling lever (9) allows, in addition to use in on-road mode the static use of the same electric bicycle also for static training activities indoors or in confined open spaces or in the open air, making it possible at the same time to recharge the batteries supplied with the same bicycle, or any other battery or electrical device that can be connected, using the cyclist's muscle power. The recharging rate of the battery or other device will of course depend on how intense and long the workout has been, but it can also contribute to overall energy savings in terms of environmental sustainability. This feature of coupling and decoupling the gears unit from the wheel on which it is able to act, concentrated in a single device, lends a further element of uniqueness to the present invention. - [0016.5] The use of the stationing element and coupling / decoupling lever (9) allows the bike to be used statically without the need for additional external equipment. Although any external equipment could increase the stabilisation of the invention in the static training mode usage, the equipment already present on it makes their presence not essential. This favours the overall simplification of the system and a saving in terms of component elements.

[0017] The specified technical task and purposes are essentially achieved by the "TRANSMISSION SYSTEM FOR ELECTRIC BICYCLE (1), PROVIDED WITH TWO MODES OF USE, PLACED INTERNALLY AND TANGENT WITH RESPECT TO THE SPOKE-LESS WHEEL ON WHICH IT IS CAPABLE OF ACTING" comprising the technical characteristics set out in one or more of the attached claims. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Further features and advantages of the present invention will become clearer from the indicative, and therefore non-limiting, description of a preferred but not exclusive form of the "TRANSMISSION SYSTEM FOR ELECTRIC BICYCLE (1), PROVIDED WITH TWO MODES OF USE, PLACED INTERNALLY AND TANGENT WITH RESPECT TO THE SPOKE-LESS WHEEL ON WHICH IT IS CAPABLE OF ACTING", as illustrated in the joint drawings from figure 1 to figure 17. Fig. 1 illustrates the side view according to the longitudinal section of the invention; Fig. 2 illustrates the cross-section of the invention, in particular the most significant portion of section A-A shown in Fig. 1; Fig. 3 shows the side view of the main components of the invention excluding the wheel; Fig. 4 shows the exploded and enlarged perspective view of the main components of the gears unit and electric motor; Fig. 5 shows the perspective view of the main components of the sliding support element with particular reference to the anchoring elements of the latter to the gears unit; Fig. 6 shows the exploded perspective view of the main components of the gears unit, the electric motor and the sliding support element containing them; Fig. 7 shows the assembled perspective view of the main components of the gears unit, the electric motor and the sliding support element containing them; Fig. 8 shows the exploded perspective view of the main components of the support frame, the stationing element and coupling / decoupling lever, the sliding support element and the spoke-less wheel; Fig. 9 shows the detailed exploded perspective view (right-hand side elements) of the support frame in the area where it joins the sliding support element and the stationing element and coupling / decoupling lever; Fig. 10 shows the detailed exploded perspective view (left-hand side elements) of the support frame in the area where it joins the sliding support element and the stationing element and coupling / decoupling lever; Fig. 11 shows the detailed exploded perspective view (left and right side elements) of the stationing element and coupling / decoupling lever; Fig. 12 illustrates the side view (right side) and rear view of the invention when assembled in on-road mode configuration; Fig. 13 illustrates the side view according to a significant longitudinal section of the invention highlighting the position of the sliding support element and the gears unit in the vicinity of the spoke-less wheel in on-road mode configuration; Fig. 14 shows the side view (right side) of the invention when assembled in static training mode configuration; Fig. 15 illustrates the side view according to a significant longitudinal section of the invention, highlighting the position of the sliding support element and the gears unit in the vicinity of the draft control pad, at the same time spaced away from the spokes-less wheel, in a static training mode configuration; Fig. 16 illustrates the perspective view of the assembled unit in on-road mode configuration; Fig. 17 illustrative block diagram.

[0019] With reference to drawings, they represent only one possible form of representation of the present invention with the purpose of better illustrating and clarifying, in combination with the description, the inventive principles underlying the invention.

[0020] LIST OF REFERENCE NUMBERS: (1). Transmission system for electric bicycle, provided with two modes of use, placed internally and tangent with respect to the spoke-less wheel on which it is capable of acting; (2). Pedals-Crank; (3). Elements of the crank axle; (4). Gears unit; (5). Spokes-less wheel; (6). Electric motor; (7). Transmission system's support frame; (8). Internal sliding support element; (9). Stationing element and coupling / decoupling lever of the gears unit to / from the spoke-less wheel; (10). Internal battery; (11). Control and setting unit able to control of various functions; (12). Brakes; (13). Setting controller display or mobile telephone, on which a specific software application has been installed, capable of allowing the selection of the adjustment settings to be implemented and the control of the reference parameters connected wirelessly with the control and setting unit 11; (14). Inverter for the conversion of electrical energy from direct current produced in static training mode into alternating electrical energy for powering and / or recharging external devices; (15). Electric energy switch of DC direct current produced by the electric motor in static training mode, used as power generator, to power the internal battery or any external battery or to power the inverter, which in turn will power any external devices, and vice versa; (16). Load-bearing or supporting frame of the bicycle; (17). Anchors to the loadbearing frame capable of being moved for adjusting the position of the drive system 1 relative to the load-bearing frame 16 of the bicycle; (18). External connection hub; (19). External bearing; (20). Toothed V-belt; (21). Freewheel bearing; (22). Gear locking discs; (23). Locking toothed crown gear; (24). Conductor-rotating planet gear carrier; (25). Satellite gears; (26). Central driven sun pinion; (27). Freewheel bearing; (28). Hermetic bearings; (29). Terminal bearings; (30). Pedal split shaft / gear; (31). Trapezoidal splined pedal splitter hub; (32). Anchorage elements of chainring 4 to internal sliding support element 8; (33). Anchoring elements of the chainring 23 to the sliding support element 8; (34). Semi-circular element for anchoring and supporting the gear wheel 35 to the sliding support element 8. This circular element is provided with a special bearing to allow rotation of the gearwheel 35; (35). Toothed wheel gear or grip contact; (36). Bearing anchoring projection 34; (37). Protective diaphragm of the gears unit and electric motor; (38). Toothed inner part or grip contact, suitable for improving adherence, of the spokes-less wheel; (39). Double-T profiled rim of the spokes-less wheel; (40). Rim groove to accommodate a tyre on the spokeless wheel; (41). Tyre on the spokeless wheel; (42). Housing element support of the brushless electric motor comprising stator and rotor; (43). Toothed wheel or grip contact keyed to the motor's timing shaft; (44). Draft or pressure sensor; (45). Oblong central slot; (46). Curvilinear prominence for spokes-less wheel rotation; (47). Initial roller of the projection; (48). Slots for anchoring the curvilinear projection to the support frame; (49). Support roller and vertical support; (50). Guide roller and horizontal spacer; (51). Inner flap for bicycle weight distribution; (52). Extensible outer flap for distributing bicycle weight and facilitating handling of the stand with the foot; (53). Locking rod for the stationing element and coupling / decoupling lever 9, acting on the radial slots operated on the circular projection 67. The rod is provided with a connection flap 54; (54). Connecting flap with its counterpart on the opposite side in order to synchronise the sliding of the two rods 53; (55). Riser with locking rod fold 53; (56). Spring-loaded coupling / uncoupling gear lever 9 release button; (57). Buttonhole for prominence with fold 55 formed on lever 9; (58). Rod thrust spring 53; (59). Thrust spring locking projection 58; (60). Slot for access to endless screw 71 for adjustment by means of external knob 74; (61). Eyelet for access to endless screw 71 for adjustment by means of external knob 74; (62). Sliding track rail of the internal sliding support element on the support frame along the y-axis; (63). Sliding slot for pin 66; (64). Sliding track / guide of the movement pin 66; (65). Slide projection inside the slide rail 62. The said projection is located on the outer side of the sliding support element 8; (66). Movement -li pin anchored on the sliding projection 65; (67). Circular rotation projection of the stationing element and the coupling / uncoupling lever 9, provided with radial slots for anchoring the rod 53. Said projection is located on the outer side of the support frame 7; (68). Circular track rails for circular rotational prominence 67 and arched track rails for sliding rod 53; (69). Friction adjustment pad during static operation of the bicycle; (70). Slide contact element of the skid with the cogwheel gear 35; (71). Worm screw for bidirectional movement of the adjustment pads along the Z2-axis, and on which the knob 74 is anchored; (72). Bearing to support and rotate the endless screw 71; (73). Transverse sliding rod of the adjustment pads with respect to the main direction of the worm screw along the Z2-axis; (74). Removable adjusting knob, passing through slots 60 and 61; (75). Connecting systems or slots for connecting the two parts comprising the support frame, the two parts comprising the internal sliding support element and the two parts comprising the stationing element and coupling / decoupling lever, as well as the two parts comprising the connecting flap of the rod 53. These systems or slots are located along the external perimeters of the above-mentioned elements; (76). External power supply and / or battery charging socket located on the support frame 7; (77). Wheel rotation speed detection sensor; (78). Inclination sensor in relation to the ground; (79). Power socket and / or external device charging located on support frame 7; (x). Tangent axis, perpendicular to y-axis and located in the longitudinal plane of the bicycle; (y). Radial axis, originating in the centre of the gears unit and located in the longitudinal plane of the bicycle, radial to the spokes-less wheel, to the gears unit contained in the sliding support element and to the support frame; (z). Horizontal transverse main axis relative to the gears unit 4; (zi). Horizontal transverse secondary axis, parallel to the z-axis, relative to the movement pin 66 anchored on the sliding projection 65 of the sliding support element 8; (Z2). Horizontal transverse secondary axis, parallel to the z-axis, relating to the worm screw 71 for bidirectional movement of the adjustment pads along the z-axis; (Z3). Horizontal transverse secondary axis, parallel to the z-axis, relating to the projection with fold 55 of the locking rod 53 and the spring-loaded release button 56 of the stationing element and coupling / disconnecting gear lever 9; DETAILED DESCRIPTION OF AT LEAST ONE PREFERRED EMBODIMENT

[0021] The invention (1) essentially consists, according to an indicative description, of the following main mechanical elements, equipment, parts and components: a. [0021.1] GEARS UNIT indicated by (4) (Fig. 4, 1, 2, 3) essentially comprising a planetary gear which receives the driving force via the pedal-crank unit (2) / crank axle element (3) which is connected to the outer connecting hub (18) of the gears unit which is in turn connected to the inner sliding support element (8) via the outer bearing (19) and anchoring elements (33) and (34). Said external connection hub (18) is splined to a freewheeling bearing (21) which is in turn connected to the conductive rotating planet carrier (24) which is able to set in motion the satellite gears (25) interposed between the internally toothed locked ring gear (23) and the central driven sun pinion (26), rotating in the same direction as the pinion carrier, on which is splined and clamped a toothed gear or adhesion contact (35) which acts on the toothing or grip contact (38) located in correspondence with the internal diameter of the spokes-less wheel (5). The said planetary gearing is hermetically sealed and kept in an oil bath by means of closing discs (22) anchored to the crown wheel (23) and equipped with sealed bearings (28). Furthermore, in order to allow the correct classical alternating and opposing pedalling, the outer connection hub (18) of the right side of the drive system is connected to the outer connection hub (18) of the left side by means of toothed trapezoidal belts (20) tensioned and wound on the trapezoidal groove formed on said hub (18) and on the trapezoidal groove pedalling split hub (31) splined and fixed on the pedalling split shaft / gear (30), parallel to and displaced with respect to the main axis (z) of the gear train, the end parts of which are inserted in the end bearings (29) fixed on the sliding element (8) located inside the support frame (7). The gears unit (4) characterised by a single gear ratio, coupled and acting in a specific position within the spokes-less wheel (5) thanks to the sliding support element (8) located on the support frame (7), behaves like a fixed gear transmission towards the electric motor (6), i.e. as if it were equipped with a transmission which does not have the freewheel mechanism, whereas it behaves like a freewheel bicycle towards the pedals 1, i.e. as if it were equipped with a freewheel or unidirectional joint, which is a mechanism that allows the movement between the sprocket and the rear wheel to be decoupled when the speed of rotation of the sprocket is lower than that of the wheel, thanks to the external connecting hub (18). This feature represents one of the new elements of the present invention, since for the first time the concept of the "direct action of the transmission of motion to the wheel" is introduced and combined in a single device with the concept of "concentrating" all the elements that constitute the transmission system in a specific area of the electric bicycle, where they cannot normally be located, in order to turn down the centre of gravity and concentrate the functions of the transmission system in a single point. b. [0021.2] SPOKE-LESS WHEEL indicated by (5) (Fig. 1, 2 and 8) is essentially constituted by a profile, metallic or plastic or wooden or composite, having a double-T cross-section, curved and closed on itself in a circular form (39), which performs the function of the wheel rim, on the internal diameter of which an internal toothed or adhesion ring gear (38) is placed in an integral manner, on the axis of which the driven pinion (26) of the gear train (4) is splined, and on the outer diameter of which there is a rim groove (40) suitable to accommodate a tyre / tire (41). The particular conformation of the spokes-less wheel (5) gives it the possibility of being positioned and anchored on the support frame (7) thanks to a pair of opposing curvilinear prominence (46), having the same circular curved geometry as the double-T profiled rim (39) and equipped with vertical support rollers (49) and horizontal guide and spacer rollers (50), positioned internally with respect to the two lateral grooves of said double T-profiled rim (39) and wherein the rollers (49) are in contact with the internal parts of the wings of said profiled rim (39) while the rollers (50) are in contact with the core of said profiled rim (39) allowing it to slide without friction and therefore the rotation of the spokes-less wheel (5) with respect to the support frame (7). The spokes-less wheel (5), combined with the gears unit (4) and placed on the support frame (7), represents another of the new elements of the present invention, since the particular conformation of said spokes-less wheel (5) and the presence of a crown gear with internal toothing or grip contact (38) in its internal diameter, which in fact constitutes a further and final gear, allows the direct transmission of the driving force and an optimal functioning of said transmission system in its entirety. c. [0021.3] SUPPORT FRAME indicated by (7) (Fig. 1, 2, 3, 8, 9 and 10) is essentially constituted by two exoskeletons, metallic or plastic or wooden or mixed / composite, of semi-circular shape with development along the direction of the longitudinal axis of the electric bicycle and having a semi-circular section enveloping the section of the spokes-less wheel (5), which are capable of housing the parts comprising the transmission system and also performing the function of "casing" or casing for support and protection of the same. The two parts comprising the support frame (7), left and right, are joined together by means of slots for connecting pins (75) along the perimeter. In particular, said support frame (7) entirely encloses and accommodates the sliding element (8), which in turn internally accommodates the gears unit (4) and the electric motor (6). At the same time, said support frame (7) encloses and partially accommodates the spokes-less wheel (5) by means of a pair of opposing curvilinear prominence (46), anchored to said frame (7) by means of anchoring slots (48), and having the same circular curvilinear geometry as the double-T profiled rim (39) and additionally provided with vertical support rollers (49) and horizontal guide and spacer rollers (50), capable of being positioned internally and in contact with the two lateral grooves of the double-T profiled rim (39). Said rollers (49) and (50) are made of soft plastic or similar material and have an internal honeycomb structure such as to absorb shocks, vibrations and noises resulting from contact with the spokes-less wheel (5) during its rotation. In addition, said support frame (7) is able to internally house the battery (10), the control and setting unit (11), which can be operated via the setting controller display (13) located on the handlebars, and the brakes (12), which can be operated by levers located on the handlebars. Furthermore, in order to permit static use of the bicycle, the support frame (7) accommodates externally with respect to its structure the stationing element and coupling / decoupling lever (9) of the gears unit to / from the spokes-less wheel, which permits stable parking of the electric bicycle in an upright position and its use for static training mode activities. Said lever (9) also permits the movement of the sliding support element (8), along the radial axis (y) (Fig. 9 and 10), by means of the grooves (45) and (63), the internal sliding rails (62) and the external circular projection (67) all present on the support frame (7). Finally, the support frame (7) houses the effort adjustment system during static training mode of the bicycle which consists of two adjustment pads (69) with opposing movement which slide on the endless screw (71), provided with an opposing thread, anchored to the support frame (7) by means of the support and rotation bearings (72) and whose position is adjustable by means of the removable knob (74) which can be introduced from the outside through the access slot (60), obtained on the lever (9), when it is aligned with the access slot (61) to the endless screw obtained on the support frame (7). The bidirectional translation of the runner blocks (69) along the axis (Z2) of rotation of the worm gear (71) is permitted by the presence of two transverse sliding rods (73) parallel to said worm gear and anchored at the ends to the support frame (7) in such a way as to prevent the rotation of the elements (69). d. [0021.4] SLIDING SUPPORT ELEMENT indicated by (8) (Fig. 5, 6, 7, 9 and 10) is essentially made up of two hollow elements, metallic or plastic or wooden or mixed / composite, with a semi-circular lateral shape with one part projecting along the direction of the longitudinal axis of the electric bicycle. The two elements are joined by means of slots for connecting pins (75) along the side perimeter. The sliding element has the unique characteristic of being movable along the radial axis (y) by means of the stationing element and coupling / decoupling lever (9) of the gears unit to / from the spokeless wheel. In fact, each hollow element has on its outer side faces two projections (65), for sliding inside the track (62) formed on the inner surface of the support frame (7), and on one of these projections a movement pin (66) is anchored. In the convex internal part, suitable for housing the gears unit (4) and the electric motor (6), the two parts comprising said sliding element (8) present two different types of anchorages. The right-hand element has anchorages (33) which form the support for the crown gear (23), while the left-hand element has a semi-circular anchorage (34), which forms the support for the bearing of the cog gear (35) on its left side, and offers the anchorage wall for the support (42) containing the electric motor (6). In addition, each hollow element has a circular slot on the side to accommodate the outer bearing (19) of the gears unit. Finally, when the two hollow elements are joined together, the lateral folded conformation of the upper part of these allows the gear wheel (35) to be visible but contained in the circular geometry of the element, while in the lower part, the arched geometry of the element allows said gear wheel (35) to partially emerge on the outside of said element by means of an elastic protection membrane (37) in contact with said gear wheel. e. [0021.5] STATIONING ELEMENT AND COUPLING / DECOUPLING LEVER indicated by (9) (Fig. 11, 8, 9,10 and 11) essentially consists of two opposed hollow elements, metallic or plastic or wooden or mixed / composite, having a circular lateral shape with a longitudinal protruding part. The two elements are joined by means of slots for connecting pins (75) located at the rear and opposed front area, near the protruding part, of the lateral perimeter in such a way as to externally wrap part of the support frame (7) in correspondence with the area in which the sliding element (8) is contained. Said hollow elements are anchored, by means of the circular track (68) with which they are equipped in the convex internal part, to the circular projection (67) present externally on the support frame (7) allowing, however, after action on the release button (56) of the coupling / uncoupling lever (9) its semi-rotation about the transverse axis (z) for a defined angular opening enabling the extreme part of the protruding part constituted by the internal and external weight distribution fins on the ground (51) and (52) to pass from the position in contact with the support frame (7) to the position in contact with the ground and vice versa. The movement and end positions of said stationing element and coupling / decoupling lever (9) interact with the control and setting unit (11) to enable functions and activities related to the modes of use of the electric bicycle. Furthermore, the rotation about the transverse axis (z) (Fig. 9 and 10) of said stationing element and coupling / decoupling lever (9) involves the simultaneous controlled movement by dragging of the sliding support element (8) equipped with a guide (65) which slides within the sliding track (62) along the direction of the radial axis (y). In particular, the rotation of said lever (9) entails the relative translation of the oblong slot (64) which houses the end part of the projection (66) integral with the sliding element (8) and passing through the fixed slot (63) obtained on the support frame (7). At the end of decoupling manoeuvre, the end parts (51) and (52) of the lever (9) are in contact with the ground, while the toothed wheel gear (35) is in a position close to the effort adjustment system able to work during static training mode of the bicycle. f. [0021.6] ELECTRIC MOTOR indicated by (6) (Fig. 1, 2, 3 and 4) is essentially constituted by a brushless DC electric motor (42), with a power of 250W or more, equipped with an electronic speed control device and operating sensors which constantly communicates with the control and setting unit (11) and acts directly on the transmission system of the electric bicycle through the coupling of the toothed wheel or grip contact (43) of the motor with the toothed wheel gear or grip contact (35) of the gears unit (4) with which it maintains a fixed transmission ratio. The said motor (6) is thus placed, in solidarity with the gears unit (4), on the sliding support element (8) which can be operated and moved by means of the coupling / decoupling lever (9) of the gears unit (4) with the spokeless wheel (5). In the on-road mode, the motor (6) through the effort or pressure sensors (44) located on the motor and in the control and setting unit (11), connected to the setting controller display (13) located on the handlebar, allows to modulate the thrust or level of the electric propulsion during the ride in accordance with the thrust exerted by the cyclist's legs, thus obviating the presence of the fixed transmission ratio but contributing, at the same time, to simplifying the number of parts making up the transmission system and increasing its overall robustness and simplicity. In addition, the electric motor, in compliance with national regulations and / or current European directives and thanks to the connection to the aforementioned regulation and control unit (11) and effort or pressure sensors (44), is automatically activated only if cyclist is pedalling at the same time, and is immediately deactivated when cyclist stops pedalling. Moreover, the motor is also automatically deactivated when the limit speed defined by the aforementioned national and / or European regulations is reached. These modes can be deactivated or modified in accordance with the evolution of the regulations or directives in force by replacing the parameters and software data of the control and setting unit (11) and the possibility of modifying the settings operable via the setting controller display (13). Finally, the electric motor (6), thanks to the control device with which it is equipped and to the said regulation and control and setting unit (11), when it absorbs mechanical energy it becomes a power generator of electrical energy and can supply it according to the possible activations deriving from the mode of use of the present invention at the specific moment. During on-road mode, the control and setting unit (11), by means of the strain (44), speed (77) and inclination (78) sensors, is able to automatically interpret braking or going downhill as situations and time periods in which to use the motor (6) as a power generator for recharging the battery (10) or any external battery and then immediately return to normal use as an electrical motor. During usage as static training mode, the propaedeutic positioning of the coupling / decoupling lever (9) in a position in contact with the ground at the same time exerts a communication to the control and setting unit (11) that the invention has changed its mode of use allowing the operation of the motor as a power generator. Therefore, the muscular power of the cyclist exerted on said electric motor can be used, by means of the selection on the electric energy switch (15), to recharge the battery (10) or other external battery through the socket (76) or, still in this mode, to charge external devices directly or through the socket (79) connected to the inverter (14). g. [0021.7] BATTERY indicated by (10) (Fig. 2 and 3) consists of a 36V rechargeable battery, as an indicative parameter, and at least 500W of power that is not affected by the memory effect. The battery (10) is connected to and powers the electric motor (6) by means of the regulation operated by the control and setting unit (11). Said battery is housed in the support frame (7) in such a position that it can be easily recharged from the outside, by means of the socket (76) housed on said frame (7) and emerging from it, but not easily removed. To remove the battery (10), the support frame (7) must be removed. The socket (76) can also be used to connect an additional external battery to supplement and add to the battery (10) in order to extend its life or power. Furthermore, the battery (10) is potentially able to receive recharging energy from the electric motor (6) in both the two modes of use of the electric bicycle; when the electric bicycle is in static training mode, by means of the coupling / decoupling lever (9) which activates the control and setting unit (11), or when the electric bicycle is in on-road mode, by means of the control and setting unit which automatically identifies the occurrence of certain situations or choices made by the cyclist; h. [0021.8] CONTROL AND SETTING UNIT indicated by (11), consists of a computerised electronic device capable of regulating and controlling the operation of the present invention by continuously managing the electric motor, the power supply, the various sensors and the various devices that may be present on the invention but are not part of it. Said control unit is housed in the support frame (7) while the adjustment and manual selection of the operating parameters can be carried out by means of a wireless controller-display device or a specific application that can be executed by means of a mobile telephone, generally defined as setting controller display (13). This control and setting unit (11), depending on the position of the stationing element and coupling / decoupling lever (9), activates and enables certain functions of the setting controller display (13), related to the selected mode, making them accessible and visible to the cyclist, who can thus make choices among the available settings. i. [0021.9] INVERTER indicated by (14) (Fig. 1 and 3) is constituted by a small-sized inverter device for the conversion of the direct current produced by the electric motor (6), during the static mode of use of the device in question or when particular and temporary conditions occur during the use of the device while driving on the road, into alternating current in order to be able to supply external loads commensurate with the current and power that can be delivered. Said inverter is housed in the support frame (7) in such a position as to be able to make available externally, by means of the socket 5 (79) housed on said frame (7) and emerging from it, the electric energy generated by the engine (6) used as a generator.

[0022] Although the invention has been explained in relation to its preferred embodiments as mentioned above, it is to be understood that many other possible modifications and variations can be made without departing from the scope of the present invention. It is 10 therefore considered that the appended claims cover such modifications and variations that fall within the true scope of the invention.

[0023] Accordingly, the present invention solves the proposed technical problem. Ing. Claudio FAZIO Alessio FAZIO 15 Luca FAZIO Aw. Donatella GUAGNANO

Claims

1. Transmission system for electric bicycle (1), provided with two modes of use, placed internally and tangent with respect to the spoke-less wheel on which it is capable of acting, comprising the following elements:GEARS UNIT (4) comprising one or more planetary gears arranged in series, wherein the first input element comprises the outer connecting hub (18), which is connected to the pedal-crank (2) and elements of the crank axle (3), and whose last output element comprises the toothed wheel or grip contact (35), which is tangential to and in contact with the inner circumference of the spoke-less wheel (5), and which, thanks to the support frame (7) and the sliding support element (8), which contains it, is capable of being positioned internally with respect to the spoke-less wheel (5) on which it is able to act by means of said toothed wheel or grip contact (35);SPOKES-LESS WHEEL (5) constituted by a rim (39) in the form of a circular crown, without spokes and the axis of the central hub of a conventional wheel, where on the external circumference there is a double opposing groove (40) apt to accommodate a tyre (41), while on the internal circumference there is, in solidarity with the rim, a crown wheel with internal teeth or grip contact (38) facing the central axis of the wheel and which is suitable for ensuring the transmission of the torque transmitted by the gears unit (4), through the contact and the gear on the toothed wheel or grip contact (35) tangential to it;SUPPORT FRAME (7), constituted of two opposing exoskeletons having a semicircular cross-section with a semi-circular shape developing along the direction of the longitudinal axis of the electric bicycle and capable of accommodating and enveloping the section of the spoke-less wheel (5), and capable of being joined together, by means of connection systems or slots for connecting pins (75), and joined to the entire load-bearing frame of the bicycle (16) by means of movable anchorages (17); said exoskeletons, on the internal part, are both provided with a curvilinear prominence (46), on which are located support rollers and vertical support (49) and guide roller and horizontal spacer (50), which allow the movement of the wheel (5) within them. Furthermore, said exoskeletons, in the internal part, are capable of housing the sliding support element (8), the controland setting unit (11), the battery (10), the inverter (14) and the brakes (12) while in the external part they are capable of housing the stationing element and coupling / decoupling lever (9), the external power supply and / or recharging sockets (76) and (79) and the electric energy switch (15);SLIDING SUPPORT ELEMENT (8), constituted by two hollow elements with opposing union, of semi-circular shape with a longitudinal projecting part, suitable to be joined, by means of connection systems or slots for connecting pins (75), to slide along the radial axis (y) by means of the external sliding projections (65), within the sliding rails track (62) placed internally to the support frame (7) and to contain and house within them the gears unit (4), anchored to the internal walls of said element by means of supports (33) and (34), and the electric motor (6), anchored through the support (42) to an internal wall of said element (8);- STATIONING ELEMENT AND COUPLING / DECOUPLING LEVER (9) comprising two hollow elements with opposing joints, of circular shape with a longitudinal projecting part, which are apt to be joined by means of connection systems or slots for connecting pins (75) and to wrap externally part of the support frame (7), in correspondence with the area in which the sliding support element (8) is contained, and which are suitable for being connected, by means of the circular rails (68) with which they are provided in their inner part, to the circular projections (67) externally present on said support frame (7), and by means of the sliding track / guide (64) with which they are provided on the internal part, to the movement pins (66) present on the sliding support element (8), enabling, however, after action on the release button (56) of the stationing element and coupling / decoupling lever (9) its semi-rotation about the horizontal transverse axis (z) for a defined angular opening enabling the end point of said projecting part, fitted with the internal and external weight distribution flaps on the ground (51) and (52), to move from the position in contact with the support frame (7) to the position in contact with the ground and vice versa;ELECTRIC MOTOR (6) comprising a brushless electric motor formed of a stator and a rotor, housed in a casing element (42), supplied by the battery (10) and connected via the toothed wheel (43) splined on the motor's distribution shaft to the toothed wheel or grip contact (35) of the gears unit (4); said electric motor is alternatively also capable of functioning as a power generator and is alsoequipped with an draft or pressure sensor (44) which transmits information to the control and setting unit (11);BATTERY (10) for supplying the electric motor (6), located inside the support frame (7) and capable of supplying the sensors, the lighting system and any other devices present on the bicycle; this battery is also equipped with a power supply socket (76) capable of receiving, even without removing it from its housing in the support frame (7), recharging from the external electric network or to connect to an external auxiliary battery; this battery (10) can also be charged by the electric motor (6) when the latter is used as a power generator;CONTROL AND SETTING UNIT (11) constituting an electronic device designed to exert adjustment and control of the power transmitted by the electric motor (6) to the gears unit (4) or, when said electric motor acts as a power generator, of the use of the energy produced, and which receives and implements the settings selected by the cyclist via the setting controller display (13) normally placed on the handlebar; said controller (11), positioned inside the support frame (7), is also equipped with a sensor for detecting the speed of rotation of the wheel (77), a sensor for the inclination of the bicycle with respect to the ground (78) and receives information from the draft or pressure sensor (44) of the electric motor (6);INVERTER (14) comprising an inverter device for converting the direct current produced by the electric motor (6), when used as a power generator, into alternating current in order to be able to supply an external battery or other external loads; said inverter (14) is positioned in the support frame (7) in such a position that the electrical energy generated by the motor (6) used as a power generator can be made available externally by means of the socket (79) housed on said frame (7) and emerging therefrom.characterised by:the position of the gears unit (4), the electric motor (6) and the pedal-crank assembly (2) and elements of the crank axle (3), due to the conformation and structure of the support frame (7), which can accommodate and hold together the component parts of the transmission system, is inside the area of the circle delimited by the inner diameter of the circular crown formed by the spoke-less wheel (5) on which said transmission system is able to act;said transmission system (1) has two modes of use, an "on-road mode" and a "static training mode ", which can be selected by the cyclist by means of an action on the release button (56) of said stationing element and coupling / decoupling lever (9) which by releasing its movement enables its semi-rotation about the horizontal transverse axis (z), for a given angular opening, with respect to the support frame (7) and which further entails, thanks to the presence on said stationing element and coupling / uncoupling lever (9) of the sliding track / guide (64) and of the sliding slot (63) on the support frame (7), the dragging of the through movement pin (66) anchored to the sliding support element (8) and the consequent controlled translation of the latter along the direction of the radial axis (y), in both directions, within the support frame (7);each of the two modes of use of the transmission system (1) corresponds to a certain position, around the transverse axis (z), of the stand and coupling / decoupling lever (9), which is associated with a consequent position, along the direction of the radial axis (y), of the sliding support element (8), which contains within it the gears unit (4) and the electric motor (6);when the transmission system (1) is in "on-road mode", the toothed wheel gear or grip contact (35) of the gears unit (4), which in this mode is tangential to the spokeless wheel (5) due to the position of the sliding support element (8) containing it, engages directly with the toothed inner or grip contact (38) located at the inner diameter of the spokeless wheel (5) on which it acts;when the transmission system (1) is in "static training mode", the toothed gear wheel or grip contact (35) of the gears unit (4), which in said mode is located in proximity of the friction adjustment pad (69) placed in a diametrically opposed position to the internal toothing or grip contact (38) by means of the displacement along the radial axis (y) of the sliding element (8) containing it assumes a position such as to permit an adjustable opposing friction action on the lateral faces of the latter by adjusting the position of said pad (69), on which the sliding contact elements (70) are housed exerted by means of an external action of the cyclist on the removable adjustment knob (74) which, by means of the access slot (61), can act on the endless screw (71) whose longitudinal axis (z?) is parallel to the horizontal transversal axis (z) and whose ends are located in the support bearings (72) anchored on the support frame (7).

2. Transmission system for electric bicycle (1), provided with two modes of use, placed internally and tangent with respect to the spoke-less wheel on which it is capable of acting, according to claim 1, characterised in that said gears unit (4) comprises at least one planetary gear which has, at the input on the right side, an external connection hub (18) which is connected to the element of the crank axle (3), from which it receives the propulsive force of the cyclist and which at the same time is splined to a freewheel bearing (21) which is in turn connected to the conductorrotating planet gear carrier (24) which is able to act and drive in rotation the satellite gears (25) meshing and interposed between the internally toothed crown gear (23), which is locked and anchored by means of the anchors (33) and (34) inside the sliding support element (8) located inside the support frame (7), and the central driven sun pinion (26), capable of rotating in the same direction as the planet gear carrier, splined by means of the freewheeling bearing (27) to the axle (z) of the toothed wheel or grip contact (35); in addition, said planetary gearing is hermetically sealed and kept in an oil bath by means of closing discs (22) anchored to the locking toothed crown gear (23) and fitted with hermetic bearings (28).

3. Transmission system for electric bicycle (1), provided with two modes of use, placed internally and tangent with respect to the spoke-less wheel on which it is capable of acting, according to claim 1 and 2, characterised by the fact that the gears unit (4) is provided with an external connection hub (18) of the right side of the transmission system which is coaxial and connected to the external connection hub (18) of the left side not in a direct way, due to the interposed presence of said gears but by means of two toothed trapezoidal belts (20), each tensioned and wound on the toothed trapezoidal groove machined on said hubs (18) and on the trapezoidal groove pedal splitter hub (31) splined and secured on the pedal splitter shaft (30) positioned parallel to the horizontal transverse axis (z) of the gears unit (4), the end parts of which are inserted into the end bearings (29) also fixed within the sliding support element (8).

4. Transmission system for electric bicycle (1), provided with two modes of use, placed internally and tangent with respect to the spoke-less wheel on which it is capable of acting, according to claim 1, characterised by the fact that the spoke-less wheel (5) is formed by a rim (39) having the shape of a circular crown with a double-T crosssection, which, thanks to its conformation, can be confined within the support frame(7) by means of the two opposing internal curvilinear prominences (46), which partially follow its circular course, interpenetrating the space comprised between the wings and the core of said double-T cross-section and ensuring its correct and stable positioning with respect to said support frame (7).

5. Transmission system for electric bicycle (1), provided with two modes of use, placed internally and tangent with respect to the spoke-less wheel on which it is capable of acting, according to claim 1, characterised in that each of the two exoskeletons comprising the support frame (7) has, in correspondence with the area housing the sliding support element (8) and the stationing element and coupling / decoupling lever (9), the following elements:an oblong central slot (45) to allow the external connection hub (18) of the gears unit (4) to be moved along the direction of the radial axis (y);a sliding slot (63), having a rectilinear course, which allows the through-handling pin (66), anchored to the sliding support element (8), to move within it along the direction of the radial axis (y);an access slot (61) to the endless screw (71) to allow the introduction of the removable adjustment knob (74);a circular rotation projection (67) located on the outer side and connecting with the circular rail (68) located on the inner side of the stationing element and coupling / decoupling lever (9) to allow semi-rotation of the latter for a defined angular amplitude;two sliding rails (62), one of which straddles the sliding slot (63), located on the inner side and connecting to the sliding projection (65) of the sliding support element (8).

6. Transmission system for electric bicycle (1), provided with two modes of use, placed internally and tangent with respect to the spoke-less wheel on which it is capable of acting, according to claims 1 and 4, characterised by the fact that each of the two exoskeletons composing the support frame (7) has, in correspondence with the part that wraps and partially accommodates the spoke-less wheel (5), a curvilinear prominence (46) internally anchored to said exoskeleton by means of anchoring slots (48) and having the same circular curved geometry of the double-T profiled rim (39) and further provided with vertical support and support rollers (49), arranged for contact with the wings of said profile, and of horizontal guide and support rollers(50), arranged for contact with the core of said profile, which are positioned internally with respect to each of the two lateral grooves of the double-T profile rim (39) and in contact with the wings and the core of said profile when said support frame (7) is assembled; in particular, said rollers (49) and (50) are made of soft plastic or similar material and have a honeycomb or similar internal shape.

7. Transmission system for electric bicycle (1), provided with two modes of use, placed internally and tangent with respect to the spoke-less wheel on which it is capable of acting, according to claim 1, characterised in that each of the two opposing hollow elements constituting the sliding support element (8) is also provided:on the external side, of two sliding risers (65) parallel to the radial axis (y) on one of which is anchored a movement pin (66) which, passing through the sliding slot (63) obtained on the support frame (7), is placed inside the sliding guide (64) on the inner side of each of the hollow opposed elements constituting the stationing element and the coupling / decoupling lever (9), thus creating a connection between the latter and said sliding support element (8); said connection is capable of permitting movement of the sliding support element (8) relative to the support element (7) by means of external actions exerted on the coupling / decoupling lever (9);on the underside, of a protective diaphragm (37) of the gears unit and electric motor, which allows only limited part of the toothed gear or grip contact (35) to come into contact with the toothed inner part or grip contact (38) of the spokeless wheel (5).

8. Transmission system for electric bicycle (1), provided with two modes of use, placed internally and tangent with respect to the spoke-less wheel on which it is capable of acting, according to claim 1, characterised in that the stationing element and coupling / decoupling lever (9) is provided with:a spring-loaded release button (56), operable by means of external pressure by the cyclist, capable of dragging the blocking rod (53) which, sliding inside the part of the circular rail (68) extending internally along the protruding part of said stand, allows its release from one of the radial anchoring slots present in at least two possible specific positions of the circular projection (67), present on the support frame (7) and housing the circular part of said circular rail (68) actuating the release and the consequent possibility of rotation of said coupling / decouplinglever (9) around the horizontal transversal axis (z) to reach one of the two available distinct positions associated with said radial anchorage slots, one linked to the "on-road mode" and the other linked to the "static training mode", wherein the blocking rod (53) can return to anchor thanks to the thrust spring (58);a sliding guide (64) obtained on the inner side of each of the opposed hollow elements, which is able to accommodate, but without permanently locking it, the terminal part of the movement pin (66) obtained on the sliding support element (8) which being passed through the rectilinear sliding slot (63) obtained on the support frame (7), is capable of dragging the sliding support element (8) along the radial axis (y) when said coupling / decoupling lever (9) is affected by a rotation for a given angular amplitude about the axis (z);an access slot (60) which, when aligned with the other access slot (61), obtained on the support frame (7), allows the introduction from the outside of the removable adjustment knob (74) for connection to the worm screw (71) capable of moving the friction adjustment pads (69) acting on the toothed wheel gear or grip contact (35).

9. Transmission system for electric bicycle (1), provided with two modes of use, placed internally and tangent with respect to the spoke-less wheel on which it is capable of acting, according to claim 1, characterised in that the electric motor (6), through the toothed wheel or grip contact (43) splined to the motor's distribution shaft is always in direct contact with the toothed or grip contact (35) of the gears unit (4) and its operation is implemented and regulated by means of the power control unit (11) capable of detecting the data coming from the draft or pressure sensor (44) from the wheel rotation speed sensor (77) and the inclination sensor with respect to the ground (78), according to the settings chosen by the cyclist by means of the setting controller display (13) normally located near the handlebars of the bicycle and connected to it by means of wired electrical cables or wireless systems.

10. Transmission system for electric bicycle (1), provided with two modes of use, placed internally and tangent with respect to the spoke-less wheel on which it is capable of acting, according to claim 1, characterised in that the electric motor (6) is in particular provided with a polarity reversal system which can be activated by means of the stationing element and the coupling / decoupling lever (9) when it is positionedin "static training mode", capable of allowing the use of said motor as a power generator of direct current for recharging the battery (10) supplied with the same bicycle, or other external battery and / or possible external user, by exploiting the muscular strength of the cyclist; also said inversion of polarity can be activated by the5 control and setting unit (11) even when the stationing element andcoupling / decoupling lever (9) is positioned in "on-road mode" by means of a braking action on the brakes (12) or downhill by means of an inclination sensor (78) or according to the cyclist's selection on the setting controller display (13).

Images