DE102011007177A1 - Wheeled vehicle i.e. bicycle, has motor coupling transferring torque of electric motor on rear wheel, where electric motor includes rotor with rotor cup formed in outer housing of electric motor - Google Patents

Abstract

The vehicle i.e. bicycle has a pedal crank (10) for converting muscle power into torque, and a pedal crank coupling for transferring the torque to a rear wheel (B). A motor coupling transfers a torque of an electric motor (20) on the rear wheel. The motor includes a rotor with a rotor cup having a bottom and a peripheral wall, where operation of the motor causes a stator to electromagnetically interact with the rotor cup. The rotor cup is formed in an outer housing of the electric motor.

Description

The invention relates to a wheeled vehicle with pedal crank and electric drive, in particular a two-wheeled vehicle with such a hybrid drive. The invention also relates to a particularly compact electric motor and a comprehensive this electric drive, which takes up little space and therefore for the drive of a wheeled vehicle, for example with pedal crank and electric drive or even the electric drive, is particularly suitable. In operable with muscle power two- and three-wheelers and also in moped-like wheeled vehicles and wheelchairs, stroller and the like, the electric drive can be used preferably.

Hybrid drives for bicycles are known in various designs, including the arrangement of an electric motor directly on the axis of rotation of the rear wheel, the front wheel or the pedal crankshaft. Such integrated arrangements require specially adapted, therefore expensive and expensive engine designs, which are also subject to integration constraints. Therefore, concepts have prevailed in the market in which the electric motor in the vicinity of the pedal crankcase is supported directly on or separately from this on the bicycle frame and either drives the rear wheel separately from the crank over its own or via a joint coupling with the pedal crank. Exemplary is on the US 4,541,500 B and the US 5,242,335 B directed. Although such an arrangement allows the use of conventional motors and also a flexible adaptation of the different speed and torque performance characteristics of pedal crank and electric drive, but on the other hand is also limited to the bottom bracket shell space available and the assembly, maintenance and repair make it difficult. The arrangement of the engine between the bottom bracket and the rear wheel, such as in the US 4,541,500 B discloses requires in diameter slender electric motors with low rated torque and correspondingly large rated speed. The speed of the engine is reduced by a multi-stage reduction gear on the rear sprocket. If larger engines are to be used with correspondingly greater torque, the distance of the wheel axles must be increased in order to create sufficient space between the bottom bracket shell and the rear wheel. The known hybrid concepts all require in the result all profound changes of the conventional bicycle geometry up to a complete redesign.

It is an object of the invention to simplify the electric motor drive part of a wheeled vehicle with pedal and electric drive, in particular the integration of the electric drive, the flexibility in terms of adaptation of the electric drive to the conditions of the pedal crank drive but to get.

According to a further aspect, an electric motor is to be provided which is compact, yet powerful and therefore particularly suitable for driving a vehicle, such as a wheeled vehicle with pedal and electric drive or driven only by the electric motor vehicle.

The invention relates to a wheeled vehicle with electric drive, which includes a frame for the suspension of a front wheel and a rear wheel, a pedal for converting muscle power into torque, an electric motor and a pedal crank and a motor coupling for transmitting the respective torque to the rear wheel includes. The frame preferably comprises a seat tube, which may also be referred to as a seat tube when the wheeled vehicle is designed as a two-wheeler. The frame may further include an upper rear strut and a lower rear strut for suspending the rear wheel. The seat tube and the two rear struts can form a side view of the wheeled vehicle at least substantially a frame triangle, preferably on the side of the pedal crank coupling. A similar frame triangle may be formed on the other side of the wheeled vehicle with the same seat tube, but a further upper rear strut and another lower rear strut to hang or support the rear wheel on both sides of the frame. However, a one-sided suspension should not be excluded. The upper and the lower rear strut can each extend to the seat tube and be connected to this fixed, preferably cohesively by means of, for example, each one welded connection. However, the two struts or even one of these two struts can also be movably connected to the seat tube, for example against the force of a spring or a damper. However, in terms of weight and price, a simply fixed connection is preferred. As seen from the seat tube, the upper rear strut extends rearwardly downwardly at least substantially in the direction of a rotational axis of the rear wheel. The lower rear strut extends rearward from the seat tube toward the axis of rotation of the rear wheel; it may extend at least substantially horizontally. In that regard, the seat tube and the two rear struts, in particular, form a rear frame triangle, as is widely used in wheeled vehicles.

In advantageous embodiments, the electric motor is supported on the frame triangle and seen in the side view of the wheeled vehicle arranged within the frame triangle. The arrangement in the frame triangle allows a stiff support of the electric motor on both the upper and the lower rear strut. The installation of the electric motor, even a subsequent installation, for example, by the user or dealer is easy, not least because of the virtually free accessibility of the location of the arrangement. Another advantage is that resorted to proven, conventional bicycle geometries, for example, a conventional frame can be used, the inventive arrangement of the electric motor thus requires no special frame construction. A bicycle according to the invention may, with the exception of the electric drive provided in addition to the pedal crank drive, be designed mechanically conventionally, in particular no wheel spacing has to be increased in order to integrate the electric drive. With regard to the adaptation of the performance of the engine to the pedal crank drive is the same flexibility as in the arrangement of the electric motor in the vicinity of the bottom bracket shell. On the other hand, the arrangement closer to the axis of rotation of the rear wheel is particularly advantageous if the electric motor aborts directly on the rear wheel via the engine coupling and is not coupled to the rear wheel via the pedal crank coupling.

In order to support the electric motor as stiff as possible and to keep vibrations in the electric drive low, an arrangement of the electric motor near the axis of rotation of the rear wheel is desirable. It is therefore advantageous if the axis of rotation of the electric motor from the axis of rotation of the rear wheel has a smaller distance than to a next point of the seat tube, the electric motor is thus arranged in the rear region, preferably entirely in the rear half of the frame triangle.

The electric motor is preferably arranged so far away from the axis of rotation of the pedal crank that it is located outside the circumferential circle of the pedal crank. The motor can protrude in such drew by the pedal cranked arrangement, at least in principle in the axial direction, parallel to the axes of rotation of the wheels, up to the level of the inside of the crank and even beyond to the outside. Otherwise, the electric motor would have to be axially so flat that it can be swept over by the crank when pedaling. Preferably, however, the electric motor is located entirely outside the peripheral circle of the pedal crank by its axis of rotation correspondingly far to lie in the rear of the frame triangle and a housing of the electric motor with its outer periphery is still outside of the pedal circle.

The electric motor is axially preferably so flat and the rear wheel axially preferably arranged so close that it protrudes axially behind a pedals of the pedal crank and does not come when pedaling with the over the pedal crank possibly projecting rear heel of the driver. Such a construction and arrangement of the engine is advantageously combined with the arrangement radially outside the pedal crank.

In preferred embodiments, the electric motor is arranged not only in the side view within the frame triangle, but also overlaps axially with the upper or the lower rear strut, so protrudes axially into the frame triangle in the direction of the rear wheel.

The pedal crank coupling may for example comprise a cardan shaft, preferably a flexible propeller shaft, or in particular a traction mechanism drive. The traction means may be a belt, preferably a toothed belt such as a carbon fiber reinforced plastic belt, or a chain. The same applies mutatis mutandis to the engine coupling. The electric motor can abort on the rear wheel via the pedal crank coupling, for example by engagement in a pulling means of the pedal crank coupling. Preferably, however, the engine coupling extends to the rear wheel separately from the pedal crank coupling. If the engine coupling comprises a traction mechanism drive, which also includes the case where the engine coupling consists of the traction mechanism drive, preferably a toothed belt is used. An advantage of the toothed belt is its play-free running. The toothed belt may in particular be a plastic toothed belt, preferably a fiber-reinforced plastic toothed belt. Carbon fiber reinforced plastic belts have the advantage of low, practically negligible elasticity. They run wear and quiet. The arrangement close to the rear wheel axle is also advantageous because when training the engine coupling as traction drive the traction means can be made in a small length.

The electric motor and the pedal crank can be arranged on opposite sides of the wheeled vehicle, the pedal crank, for example, as usual right and the electric motor to the left of the rear wheel. Accordingly, the pedal crank and the electric motor would drive away on different sides of the rear wheel.

In preferred embodiments, however, the crank and the electric motor drive on the same side of the rear wheel. In such embodiments, the electric motor is arranged on the same side as the pedal crank coupling. If the pedal crank coupling and also the engine coupling are each a traction mechanism drive or if they each include a traction mechanism drive, then preferably each of the couplings has a separate rear wheel pinion that is rotatable about the axis of rotation of the rear wheel, the pedal crank coupling a crank rear sprocket and the engine clutch an engine rear sprocket. If the engine coupling runs separately from the pedal crank coupling to the rear wheel, a pedal crank pinion gear arranged in the pedal crank coupling and rotatable about the axis of rotation of the rear wheel and an engine rear pinion rotatable about the axis of rotation of the rear wheel can be arranged axially directly adjacent to one another. The crank rear sprocket and the motor rear sprocket may be drivingly separated from each other by a freewheel disposed on the rotational axis of the rear wheel or each by such a freewheel to prevent the crank cranking the electric motor or the electric motor cranking the crank. More preferably, however, the engine rear sprocket and the rear crank sprocket are integrally formed in one piece or torsionally rigid with respect to both directions of rotation, preferably to a double pinion comprising only these two sprockets, thus forming a rotary unit. At least one freewheel, preferably an engine freewheel and also a pedal crank freewheel, is preferably nevertheless provided, albeit at a different location, preferably in the torque train closer to the engine or the pedal crank.

Preferred embodiments, it corresponds to when the torque of the electric motor via a withdrawn from the axis of rotation of the rear wheel engine freewheel or the torque of the pedal crank over a withdrawn from the rotational axis of the rear wheel pedal freewheel on the axis of rotation of the rear wheel is or are.

If the crankshaft coupling and the engine coupling run side by side on the same side of the rear wheel, it is preferred if the engine coupling is axially closer to the rear wheel than the pedal crank coupling. When forming both couplings by means of a respective traction means, the engine rear sprocket in such arrangements, the axially inner and the pedal crank rear sprocket is the outer of these two pinions. A motor shaft of the electric motor can axially overlap the pedal crank coupling in such embodiments.

In order to be able to arrange the electric motor close to the axis of rotation of the rear wheel, the electric motor in the side view of the wheeled vehicle can overlap with the pedal cranking coupling. Preferably, a rotor or a stature of the electric motor overlaps with the pedal crank coupling. The word "or" is always understood here as otherwise by the invention as "inclusive or", ie includes the meaning of "either ... or" as well as "and", as far as the respective concrete context is not exclusive only one of these two meanings can result. With reference to the overlapping arrangement, this means that in first variants only the stature, in second variants only the rotor and in third variants both the rotor and the stature overlap with the pedal crank coupling. In the case of a coupling by means of traction means, the stature or rotor preferably overlaps or overlaps only one upper strand of the traction means of the pedal crank coupling. Conveniently, the stature or rotor is located axially outside of the pedal crank coupling and a motor pinion axially inwardly of the pedal crank, closer than this at the rear wheel.

For its rigid support, the electric motor can be supported on both rear struts by means of a support device extending to the upper rear strut and the lower rear strut. The support means comprises an upper support and a lower support. The electric motor is supported on the upper rear strut by means of the upper support and on the lower rear strut by means of the lower support. The electric motor is preferably fastened on the outside of the support device, viewed from the rear wheel. The connection is preferably detachable, for example a detachable screw connection. If the support means is formed in one piece, it preferably has a passageway through which an engine output shaft extends toward the rear wheel such that a motor pinion from which the electric motor can drive off the rear wheel is interposed between the support means and the rear wheel can be. However, the support device may preferably also be multi-part, preferably in two parts. In the multi-part variant, the lower support is designed separately from the upper support. The upper support serves to support the electric motor on the upper rear strut, and the lower support serves to support the engine on the lower rear strut. The one-piece support device may in particular be a sheet metal structure shaped in accordance with the spatial conditions of the frame triangle. The same applies to the preferred multi-part support device, ie for their separate supports each. Instead of one or more sheet metal structures is also a support means or come supports a multi-part support means made of plastic, preferably a reinforced plastic into consideration. A multi-part, preferably exactly two-piece support means has the advantage that the individual supports are easier to be formed as a one-piece support means, especially since the area spanned by the frame triangle is not perpendicular to the axis of rotation of the rear wheel in most cases. The electric motor is preferably aligned by means of the support means to this axis of rotation. Between the separate supports of the multi-part support device remains in preferred embodiments, a clear distance and thus a free space, in the area seen in the side view of the wheeled a traction means of a preferred Tretkurbelkopplung can run, so that the split support means may be slimmer in the axial direction with overlapping arrangement of the electric motor at least by the wall thickness of the support means as a one-piece support means. The multi-part can finally be saved even weight.

In particular, a multi-part support means may comprise an upper support connected to the upper rear strut and a lower support connected to the lower rear strut, the upper support being seen from the upper rear strut towards the lower rear strut and the lower support from FIG the lower rear strut protrudes toward the upper rear strut. Seen in the side view remains between the supports preferably a clear distance, the above-mentioned space for example, a chain or a belt. The engine can be considered as part of the support means, when serving as a mounting structure of the motor, with respect to the frame fixed housing part of the motor with the upper and the lower support respectively. Preferably, a housing cover forms this mounting structure. The engine bridges in the side view, the space between the supports. When it is mentioned above of a two-part support means, the connecting mounting structure of the engine, such as a housing cover is not counted. The mounting structure is preferably detachably mounted or mounted on the support means.

In preferred embodiments, the upper support is or are along the upper rear strut linear or strip-shaped extending or at spaced support points or the lower support along the lower rear strut linear or strip-shaped or supported at spaced support points. The electric motor is preferably arranged in the sense of a rigid support, that extend the upper support of the upper rear strut and the lower support of the lower rear strut respectively in the direction of the axis of rotation of the rotor of the electric motor. Thus, in the side elevational view parallel to the rear wheel axle, a straight radial line to the axis of rotation of the rotor intersects the upper rear strut between the endpoints of the support of the upper support and a radial straight line to the axis of rotation of the rotor intersects the lower rear strut between the endpoints of the support of the lower support , As already mentioned, the upper and lower supports can be molded in one piece or firmly connected together. More preferably, however, they are manufactured separately and have said space between them.

If the electric motor is supported by means of an upper strut on at least one support point of the upper rear strut and by means of a lower strut on at least one support point of the lower rear strut, the upper support for a rigid support can be advantageously arranged so that the axis of rotation of the rotor in the axis of rotation parallel side view is located in a triangle whose vertices are the axis of rotation of the rear wheel, the at least one support point of the upper rear strut and the at least one support point of the lower rear strut. An arrangement such that the axis of rotation of the rotor lies on a straight connecting line connecting the support points is included. In embodiments in which the support on the upper rear strut or the support on the lower rear strut in the side view is linear, replaces an end point at the remote from the rear wheel axle end of the respective support the at least one support point of the respective rear strut, so the two of the rear wheel axle removed vertices of the triangle. If the motor is supported by the upper support at a plurality of support points of the upper rear strut or at a plurality of support points of the lower rear strut, the motor is preferably arranged so that the axis of rotation of the motor is in a surface area, including the edge of the surface area, a first and a limit second straight connecting line. The first connection line connects a first support point of the upper rear strut with a first support point of the lower rear strut. The second connecting line connects a second support point of the upper rear strut with a second support point of the lower rear strut, but the second support point of the upper rear strut from the first support point of the upper rear strut or the second support point of the lower rear strut from the first support point of the lower rear strut at a distance , In extreme cases, the surface area may be a triangular area if only one supporting point is present on one of the rear wheel struts, but preferably the first and second connecting lines between the rear wheel struts extend at a distance from each other everywhere. In embodiments in which the support on the upper rear strut or the support on the lower rear strut in the side view is linear, endpoints of the respective support replace the first and second support points of the respective rear strut.

In preferred embodiments, the rear wheel of the pedal crank via a variable transmission, suitably a manual transmission drivable. For example, several trolley crank rear sprockets can be arranged side by side on the axis of rotation of the rear wheel and be switched by means of a Zugmittelhebers. More preferably, the variable transmission is disposed in a hub of the rear wheel. The variable transmission may in particular be a planetary gear. The pedal drive drives on a transmission input shaft of the variable transmission from.

In a further development, the electric motor is also coupled to the rear wheel via a variable transmission, expediently via a manual transmission, so that with this variable transmission the speed ratio of the rear wheel relative to the engine can be varied. Preferably, the electric motor drives the rear wheel via the same variable transmission as the pedal crank. More preferably, the electric motor drives via the engine coupling to the same transmission input shaft as the pedal crank drive. In the case of a motor coupling which is preferably separate from the pedal crank coupling, both drives transmit their torque separately to the rear wheel, but the two torques are introduced into the same transmission input member. This common transmission input member or the common transmission input shaft is firmly connected in such embodiments at least in driving direction with the rear wheel pinion and the pedal rear sprocket so that driven via these two rear sprocket directly the common transmission input member and from this via other transmission elements of the variable transmission to the Rear hub is driven off. This simplifies training of the variable transmission as a manually operable transmission and the handling of the hybrid drive for the driver and reduces the constructive effort to be operated compared to a drive concept with only one of the two types of drive.

Are arranged on the axis of rotation of the rear wheel Hinterradritzel the drives simply torsionally rigidly connected to the same transmission input member of the variable transmission, an optional freewheel of the electric drive or the pedal drive thus moved away from the axis of rotation of the rear wheel, preferably arranged in the pedal crank or the electric motor is Rear wheel and in the rear suspension no or at most only a very small adjustment effort to operate. A double gear, formed of crank rear sprocket and motor rear sprocket, can build axially slender and be placed practically like a single pinion on the axis of rotation. The arrangement of a motor freewheel moved away from the axis of rotation of the rear wheel is also advantageous for the freewheel as such. Thus, a motor freewheel advantageously be arranged directly at the electric motor, advantageously on the axis of rotation of the motor shaft, or, should this not coincide with the axis of rotation of the rotor of the electric motor, on the axis of rotation of the rotor. Since the speed of the electric motor is preferably reduced to the rear wheel, the torque load for the engine freewheel can be reduced in comparison with the arrangement of the freewheel on the axis of rotation of the rear wheel according to the reduction ratio and the engine freewheel are dimensioned correspondingly weaker. This saves costs and space for the freewheel.

The electric motor can drive the rear wheel via a cardan shaft, preferably a flexible cardan shaft, alternatively and more preferably via a pair of spur gears or more preferably by means of a traction mechanism gearbox. As already mentioned, a toothed belt drive is particularly preferred. In addition to the advantages mentioned, a toothed belt drive also permits a large reduction of the engine speed, not least because of the fine tooth pitch that can be realized by means of a toothed belt. Thus, it corresponds to preferred embodiments, when the timing belt is equipped with respect to its toothing with a modulus of at most two, more preferably at most 1.5. This helps to ensure that a motor pinion is always engaged with the timing belt with a sufficient number of teeth, and thus that the diameter of the pinion gear can be advantageously reduced to increase the reduction ratio.

In preferred embodiments, a motor freewheel is arranged between the rotor of the electric motor and the motor shaft. The engine freewheel can be arranged in particular in an annular gap between the rotor and a motor shaft extending in or through the rotor and in particular be formed as a sleeve freewheel. With regard to advantageous arrangements of the engine freewheel, the WO 2009/127263 A1 and the PCT / EP2009 / 055308 referenced. Preferably, a freewheel is arranged in the pedal crank coupling. The pedal crank can be arranged in particular between the pedal crankshaft and the pedal crank pinion. In the case of the arrangement of both an engine freewheel and a pedal crank, the wheeled vehicle can either be driven either only by means of the crank or only by means of the electric motor or with superimposition of both drives. The engine does not drive the pedal crank and this does not drive the electric motor. Preferred drive management possibilities are also disclosed in the two aforementioned PCT applications in connection with the measurement of the torque transmitted by the pedal crankshaft, so that the two PCT applications also each relate to the drive management and the measurement of the torque transmitted by the crankshaft be referred to.

In preferred embodiments, the electric motor is designed so that the rotor comprises a rotor pot, which surrounds the stator circumferentially on an end face and on the outer circumference, and the rotor pot forms an outer housing of the electric motor, that is directly in contact with the environment. A consequence of this embodiment is that the outer housing of the electric motor rotates during operation of the electric motor. The electric motor is in preferred embodiments, an external rotor, correspondingly surrounds an electromagnetically effective part of the rotor to form a narrow gap, the stator at the outer periphery. The electromagnetic part of the rotor is arranged on the inside of the peripheral wall of the rotor pot or forms the peripheral wall. Preferably, the electromagnetically effective part of the rotor is composed of permanent magnets, which are arranged in an alternating sequence of poles in the circumferential direction of the pot peripheral wall. The WO 2009/127263 A1 is also referred to in terms of preferred features for the external rotor motor, as far as it is not the outer housing of the electric motor.

The stator can advantageously form a lid for the rotor pot, said lid resting relative to the frame of the wheeled vehicle. The stator advantageously comprises the electromagnetic part of the electric motor to be supplied with electrical energy, that is to say its coil (s). The rotor pot preferably surrounds the stator at its axial outside, the side remote from the rear wheel. The cover formed by the stator, hereinafter referred to as the stator cover, is preferably also a housing outer wall, namely a housing cover. The stator cover may in particular form an axially inner housing outer wall facing the rear wheel. The stator cover is advantageously axially flat, it may in particular be disc-shaped. If the stator cover forms a mounting structure of the electric motor so that the electric motor can be fastened or fastened directly to the stator cover on the support device, the axial thickness of the motor can be reduced.

The stator cover preferably closes the rotor pot sufficiently tightly to prevent the ingress of dirt or water into the thus formed motor housing. Rotortopf and stator cover preferably form directly with each other a shaft seal, which is preferably designed as a non-contact shaft seal, for example in the manner of a labyrinth seal. In order to obtain a rotating around the axis of rotation of the rotor shaft seal, the stator cover may have a Statordichtststeg and the rotor pot on its peripheral wall a rotor sealing web, which overlap each other radially or preferably axially. In order to increase the tightness, it is advantageous if the stator sealing web or the rotor sealing web circumferentially at least one sealing groove and the respective other sealing web form a sealing ring dipping into the sealing groove. The shaft seal can also be embodied in even more stages, for example such that both sealing webs each form a sealing groove and in each case a sealing ring which dips into the sealing groove of the respective other part. The rotor sealing web and the stator sealing web can radially overlap one another, the rotor sealing web or the stator sealing web can be embodied, for example, as the said sealing groove which opens radially inwards, so that the respective other sealing web dips radially into the sealing groove. However, in order to be able to advantageously keep the diameter of the electric motor small, it is preferred if the stator sealing web and the rotor sealing web overlap one another in the axial direction. In this way, the rotor pot can very easily and in the radial direction save space with its the rear wheel facing free peripheral edge axially into the overlap with the Statordichtsteg, preferably dive into the sealing groove located on the stator cover.

The rotor pot and the stator cover advantageously together already form a housing of the electric motor mounted or mountable as a mounting unit. In the mounted state, a housing part of the engine, that is to say the rotor pot, rotates in driving operation correspondingly visible from the outside. The rotor pot is therefore preferably smooth outside over the peripheral wall and the bottom. As the bottom of the rotor preferably forms a housing wall which is axially remote from the rear wheel, it can also be optically conspicuous in order to emphasize the special feature of a rotating motor housing in terms of design.

In order to obtain a motor with a small axial thickness, the stator may be constructed such that a thin stator cover is disposed axially immediately adjacent to the electromagnetically effective part of the stator. From the stator cover, a sleeve-shaped carrier region can protrude axially centrally, the cover thus forming a flange projecting radially around the axis of rotation of the rotor and projecting from this central carrier region. The electromagnetically effective part of the stator can be arranged on the central carrier area directly axially next to the lid. In such embodiments, the axial thickness of the stator may be equal to the sum of the thickness of the stator cover, the axial thickness of the electromagnetically active portion of the stator, and the axial width of a narrow gap if there is a gap between the cover and the electromagnetically active portion.

The axial thickness of the rotor may be equal to the axial length of the rotor pot. The axial thickness of the electric motor corresponds in preferred embodiments of the axial thickness of the electromagnetically effective part of the motor plus the thickness of the stator cover and the thickness of the rotor pot bottom and advantageously only a narrow gap, the electromagnetically effective part of the motor from the stator cover on the one hand and from the rotor pot bottom on the other side.

The design of the electric motor as an external rotor and the shape of the rotor as a rotor pot and in particular the use of the rotor pot directly as an outer motor housing make it possible to produce a high torque compared to internal rotors at low engine speed and the electric motor both radially to its axis of rotation and axially compact to build. An electric motor with a sufficient for everyday performance can be performed axially in a thickness of less than 10 cm, advantageously even less than 7 cm, with outer diameters of the ring pot of less than 20 cm. At a rated power of, for example, 500 W, the engine can make do with a total weight of less than 2 kg. In trial operation, a motor with a nominal power of 500 W, a mass of about 1.6 kg and a thickness of about 40 mm has proven itself. An advantageous electric motor accordingly has an axial thickness of preferably less than 10 cm, more preferably less than 7 cm, with a nominal power of at least 500 W, the rotating outer casing, the ring pot, having an outer diameter of preferably less than 25 cm, more preferably less than 20 cm. In the thickness specification, a motor shaft and a motor pinion guided out of the motor housing are not taken into consideration, the thickness is measured from the outside of the bottom of the rotor pot and the opposite outside of the stator cover. In the mass specification, however, the motor shaft and the motor pinion are included. Aside from the motor shaft projecting out of the housing and the motor pinion rotatably connected thereto, the motor as a whole preferably has the form of a simple, at least substantially smooth disc or a flat circular cylinder.

As a result of the preferred embodiment of the electric motor as an external rotor motor, any reduction of the rotor speed to the axis of rotation of the rear wheel in the engine coupling can advantageously take place there with a single circulating traction device. A reduction between rotor and motor pinion is not required. It also corresponds to preferred embodiments, to transmit the speed of the rotor 1: 1 to the motor pinion and first set down in the torque train. Preferably, the electric motor and the engine coupling are designed so that the speed of the rotor is 1: 1 transmitted to the motor pinion, preferably via a motor freewheel, and the motor pinion abtriebs in a single gear stage on the rear wheel, preferably by means of a toothed belt or optionally another traction means such as a chain, on an arranged on the axis of rotation of the rear wheel engine rear sprocket. Further gear stages are advantageously not required between the motor pinion and the motor rear pinion. On the other hand, however, it corresponds to preferred embodiments, if as stated above directly on the rear wheel, preferably in a wheel hub, a variable transmission is arranged and the rear wheel is driven by the engine via this variable transmission.

In the pedal crank drive is preferably translated by a pedal crank on said pedal rear sprocket, so translates the speed of the pedal crank within the pedal crank on the rear wheel to fast. The engine rear sprocket is advantageously much larger in diameter than the crank rear sprocket. The rotating about the axis of rotation of the pedal crank crank pinion is advantageously much larger in diameter than the rotating with the motor shaft motor pinion. There is thus a translation of the speed of the crank and a reduction of the speed of the electric motor instead, which can be done in the execution of the electric motor as an external rotor motor advantageously up to the engine rear sprocket including in only a single gear stage of the electric drive.

In preferred embodiments, a motor output shaft arranged fixedly on or on a motor shaft is easily replaceable, preferably together with the motor shaft. The easy interchangeability is not only beneficial for maintenance and repair work, but also facilitates flexible adaptation of the reduction ratio within the engine coupling to the needs of the user. Dealers and also the user himself can adapt the motor drive part very easily and therefore flexibly to the personal needs of the respective user. For the adaptation engine sprockets can be kept in different sizes or numbers of teeth and installed on site, at the dealer or user, or replaced. The motor shaft projects into, preferably through a central cavity of the rotor and preferably also through a housing of the motor. It is axially secured relative to the rotor by means of a detachable axial lock, for example by means of a releasable securing element or a plurality of releasable securing elements. The axial securing is arranged outside the cavity, preferably outside the housing of the electric motor. The axial lock secures the shaft with respect to one of the two axial directions. The one or more securing element (s) of the axial securing can or may in each case be formed in particular as a snap ring. For easy replacement, a releasable axial securing of the motor shaft is preferred, but in principle, instead or additionally, the motor pinion could be releasably secured axially relative to the motor shaft. However, in the manner explained in dissolved axial securing together with the motor pinion axially movable from the cavity motor shaft is in terms of accessibility of advantage, especially in embodiments in which the motor pinion the Rear wheel axially closer than the rotor is arranged. In these preferred embodiments, the releasable axial lock can be formed on the side facing away from the motor pinion, easily accessible from the outside of the cavity or the motor housing.

Not least for an interchangeability of the engine pinion, it is advantageous if the electric motor is in engagement with the support means, which can be loosened, the engagement preferably includes a clamping engagement, and the electric motor in the relaxed, but still with the support device existing relative is movable to the support means and in at least one of a plurality of different positions can be blocked, preferably non-positively. The engagement may be developed into a guiding engagement, in which the electric motor is adjustably guided relative to the support device. The engagement may be formed, in particular, by means of a slot and a mounting element engaging in the oblong hole, and more preferably with a plurality of pairs of such engagement elements. Thus, the support means may comprise one or more slots for one or more mounting elements of the electric motor. A reversal of these conditions is also conceivable, as well as a combination in which both the support means and the motor each have at least one slot and at least one cooperating with the respective slot mounting member. The engagement is formed so that can be adjusted by adjusting the position of the motor relative to the support device in further existing with the support means engagement and a distance between the axis of rotation of the rotor and the axis of rotation of the motor Hinterradritzels, for example, tension a traction means of the engine coupling or relax or in particular to use motor pinion different circumference with the same traction means can.

An electric motor for a wheeled vehicle is already beneficial for itself. Such an electric motor comprises a stator and a rotor interacting electromagnetically with the stator and rotatable about a motor axis relative to the stator, comprising a rotor pot surrounding the stator on one end face and at least on the outer circumference, which is an outer housing rotating during operation of the electric motor of the electric motor forms. While such an electric motor may be advantageously combined with any feature disclosed in the invention claimed herein, each in its own right and in any combination of features, it is already advantageous as such. Although the electric motor can advantageously be arranged according to the invention claimed here, in the side view of the wheeled vehicle within a rear frame triangle, but it can in principle be arranged at a different location or in any other way than described here on the wheeled vehicle. Such an electric motor is also advantageous in other applications.

The invention also provides an electric motor for driving preferably a wheeled vehicle as such. The electric motor comprises a stator with an electromagnetically active stator part and a rotor with a rotor pot, which has a bottom and a peripheral wall and surrounds the stator with its bottom on an end face and with its peripheral wall on the outside circumferentially. A rotor part which interacts electromagnetically with the stator during operation of the electric motor is arranged on the circumferential wall of the rotor pot or forms the circumferential wall. The rotor pot forms a rotating during operation of the electric motor outer housing of the electric motor.

If the stator forms a stator cover for the rotor pot axially opposite the bottom of the rotor pot, a particularly compact motor with a motor housing consisting only of the rotor pot and the stator cover can be obtained.

The rotor pot forms outer walls of the motor housing, namely the bottom at one end face and the peripheral wall. At least it forms an axial portion of the peripheral wall, preferably at least the major part of the axial length of the peripheral wall. The motor housing formed by means of the rotor pot encapsulates electromagnetically effective parts of the motor for practical use under the usual weather conditions sufficiently tight, in particular waterproof. It may advantageously form the assembly unit already discussed, so that the motor can be assembled or disassembled as a compact, finished unit or the position of the motor can be adjusted in the mounted state.

In preferred embodiments, the stator has a stator carrier with a central, sleeve-shaped carrier region and a flange region protruding radially outward from the central carrier region. An electromagnetically effective part of the stator is arranged on an outer circumference of the carrier region, preferably a coil part of the motor, while the stator forms with the flange region a stator cover for the rotor pot, which closes off the pot, preferably watertight. The rotor pot may comprise a rotor shaft which extends from the bottom of the rotor pot in the central support region of the stator and is rotatably supported there on the stator in both directions of rotation.

The electric motor is preferably mounted or mountable in the region of the stator cover on a support device, preferably on a wheeled vehicle. The stator cover may include one or more mounting elements, such as one or more Holes or one or more slots or one or more screws, for mounting the electric motor to the support means.

A power source for the electric motor is seen in preferred embodiments in the side view of the wheeled vehicle within the frame, but arranged in front of the seat tube. The seat tube forms in preferred embodiments with a head tube, which serves to support a front fork, an upper strut and a lower strut a front part of the frame, a front frame. The power source is arranged in preferred embodiments in the side view within the front frame. A housing of the power source can fill in accordance with a further advantageous aspect of the invention, a majority of the framed by the seat tube, the head tube and the two struts surface, preferably, the housing fills almost the entire or even the entire surface so framed. Such a large-area power source housing can advantageously be designed in a small axial thickness. Preferably, it is only a few centimeters thick, relatively not more than five times, more preferably not more than four or three times as thick as the upper strut or the lower strut. The upper strut and the lower strut may be designed as a top tube and down tube. Also, the seat tube does not necessarily have to be shaped as a tube, although it is convenient. As a seat tube is also understood a non-tubular support column which supports the seat, preferably a saddle, of the wheeled vehicle. This also applies to the seat tube under the invention claimed here. The upper and lower rear struts, on which preferably the electric motor is supported, may also be tubular in particular. The handlebar and the suspension of the front wheel are supported on the head tube.

• a) einen der Aufhängung eines Vorderrads (A) und eines Hinterrads (B) dienenden Rahmen (1–8) mit einem Sitzrohr (1), einer Oberstrebe (3), einer Unterstrebe (3) und einem mittels der Streben (3, 4) mit dem Sitzrohr (1) verbundenen Steuerrohr (2),
• b) einen elektrischen Verbraucher (20), vorzugsweise Elektromotor,
• c) und ein Gehäuse (9) für eine Stromquelle zur Versorgung des Verbrauchers (20) mit elektrischer Energie, wobei
• d) das Stromquellengehäuse (9) im Rahmen (1–8) zwischen dem Sitzrohr (1), dem Steuerrohr (2) und den Streben (3, 4) angeordnet ist
• e) und in einer Seitenansicht gesehen einen überwiegenden Teil der vom Sitzrohr (1), dem Steuerrohr (2) und den Streben (3, 4) umrahmten Fläche ausfüllt.

Although such a arranged, large-area power source housing for receiving a power source is preferably used in combination with the invention claimed here, but is also already alone, of advantage. An independent subject of protection in the context of a possible divisional application can therefore also be a wheeled vehicle comprising the wheeled vehicle:

• a) one of the suspension of a front wheel (A) and a rear wheel (B) serving frame ( 1 - 8th ) with a seat tube ( 1 ), an upper strut ( 3 ), a lower strut ( 3 ) and one by means of striving ( 3 . 4 ) with the seat tube ( 1 ) connected control tube ( 2 )
• b) an electrical consumer ( 20 ), preferably electric motor,
• c) and a housing ( 9 ) for a power source for supplying the consumer ( 20 ) with electrical energy, wherein
• d) the power source housing ( 9 ) as part of ( 1 - 8th ) between the seat tube ( 1 ), the head tube ( 2 ) and the aspiration ( 3 . 4 ) is arranged
• e) and seen in a side view a predominant part of the seat tube ( 1 ), the head tube ( 2 ) and the aspiration ( 3 . 4 ) fills the framed area.

The wheeled vehicle can with power sources of different capacity, optionally, for example, 6, 12, 18 or 24 Ah (amp hours) at z. B each 50 V nominal voltage to be equipped. Advantageously, there is also the option of subsequently increasing the capacity of, for example, 300 Wh (watt-hours) of original capacity to 900 Wh or another size. A system of current sources may be used which differ in their capacity from one another, for example in natural multiples of a smallest capacity of x Wh, ie x, 2x, 3x, ..., nx Wh. Accordingly, they differ in terms of their volume and their mass. The power source housing is advantageously large enough and configured to selectively accommodate each of the different power sources, for example either the smallest or the largest. In particular, the power sources and the power source housing may also be such that two or more power sources each of a smaller capacity in the power source housing can be arranged simultaneously and connected to a power source of greater capacity, whereby the possibility of retrofitting with continued use of a previously existing power source would be given ,

In yet another aspect, the invention also relates to a bicycle frame system having a first frame and at least one further second frame that is different in size from the first frame. The different frames of the system differ in the position or inclination that the control tube has relative to the seat tube. The relative position difference consists only in that the control tube is offset in the different frames of each one of the frame to the other seen parallel to itself. Such positional shift may be combined with a difference in relative tilt. Preferably, however, the control tubes are offset only parallel to themselves when comparing the different frames superimposed. The seat tube is the same at the frames of the system between the upper strut and the lower strut. The course of the upper strut and the course of the lower strut are also the same, in the said relative positional shift, the upper struts or the lower struts of the different frames, preferably both struts from the other frame, only differ in length. If one puts the different frames on each other, they thus agree from the seat tube in the direction of the head tube over the vast majority of their lengths and differ only directly in the region of the head tube from each other. Outside the framed area, the seat tube between the front frame and seat may have different lengths. The manufacturing technology basically the same frame can be used for the production of bicycles for different sized driver. Preferably, the frames of the system each have the same rear triangle, which can be formed in particular by a simple rear triangle, the explanations given under the invention claimed herein to the rear triangle preferably also apply to the different frames of the system.

• a) einem ersten Rahmen (51) und wenigstens einem der Größe nach unterschiedlichen zweiten Rahmen (52),
• b) die jeweils ein Sitzrohr (1), eine Oberstrebe (3), eine Unterstrebe (3) und ein mittels der Streben (3, 4) mit dem Sitzrohr (1) verbundenes Steuerrohr (2) aufweisen, die eine im jeweiligen Rahmen (51, 52) freibleibende Rahmenfläche umgeben,
• c) wobei sich bei jedem der Rahmen (51, 52) wenigstens eine der Streben (3, 4) bis zum Steuerrohr (2) erstreckt,
• d) die Rahmenflächen bis nahe zum jeweiligen Steuerrohr (2) gleich
• e) und durch Parallelverschiebung des Steuerrohrs (2) zu sich selbst oder eine Drehung des Steuerrohrs (2) um eine quer zur jeweiligen Rahmenfläche weisende Achse ineinander überführbar sind.

The subject of a possible divisional application can therefore also be a bicycle system with:

• a) a first framework ( 51 ) and at least one size-different second frame ( 52 )
• b) each one seat tube ( 1 ), an upper strut ( 3 ), a lower strut ( 3 ) and one by means of striving ( 3 . 4 ) with the seat tube ( 1 ) connected control tube ( 2 ), one in each frame ( 51 . 52 ) surrounding area,
• c) where each of the frames ( 51 . 52 ) at least one of the struts ( 3 . 4 ) to the head tube ( 2 ),
• d) the frame surfaces close to the respective head tube ( 2 ) equal
• e) and by parallel displacement of the head tube ( 2 ) to itself or a rotation of the head tube ( 2 ) can be converted into one another about an axis pointing transversely to the respective frame surface.

The upper strut and the lower strut preferably extend in each case to the seat tube of the respective frame ( 51 . 52 ). The seat tubes are over their between the struts ( 3 . 4 ) extended length ( 1a ) advantageously the same. So can or can the upper strut of the first frame ( 51 ) only in the length of the upper strut of the second frame ( 52 ) or the lower strut ( 4 ) of the first frame ( 51 ) only in the length of the lower strut ( 4 ) of the second framework ( 52 ).

• a) die Oberstrebe (3) des ersten Rahmens (51) hat eine andere Länge als die Oberstrebe (3) des zweiten Rahmens (52) und die Oberstreben (3) unterscheiden sich vorzugsweise nur in Bezug auf die Länge voneinander;
• b) die Unterstrebe (4) des ersten Rahmens (51) hat eine andere Länge hat als die Unterstrebe (4) des zweiten Rahmens (52) und die Unterstreben (4) unterscheiden sich vorzugsweise nur in Bezug auf die Länge voneinander;
• c) die Oberstrebe (3) und die Unterstrebe (4) erstrecken sich bei jedem der Rahmen (51, 52) vom Sitzrohr (1) bis zum Steuerrohr (2);
• d) die Position des Steuerrohrs (2) variiert relativ zum Sitzrohr (1) in Fahrtrichtung (X) und in Höhenrichtung (Z);
• e) das Sitzrohr (1) weist bei jedem der Rahmen (51, 52) einen über die Oberstrebe (3) des jeweiligen Rahmens (51, 52) hinausragenden oberen Abschnitt (1b) auf, und der obere Abschnitt (1b) des ersten Rahmens (51) hat eine andere Länge als der obere Abschnitt (1b) des zweiten Rahmens (52).

It is advantageous if at least one of the following features is fulfilled:

• a) the upper strut ( 3 ) of the first frame ( 51 ) has a different length than the upper strut ( 3 ) of the second framework ( 52 ) and the upper struts ( 3 ) preferably differ from each other only in relation to the length;
• b) the lower strut ( 4 ) of the first frame ( 51 ) has a different length than the lower strut ( 4 ) of the second framework ( 52 ) and the sub-strives ( 4 ) preferably differ from each other only in relation to the length;
• c) the upper strut ( 3 ) and the lower strut ( 4 ) extend to each of the frames ( 51 . 52 ) from the seat tube ( 1 ) to the head tube ( 2 );
• d) the position of the head tube ( 2 ) varies relative to the seat tube ( 1 ) in the direction of travel (X) and in the height direction (Z);
• e) the seat tube ( 1 ) indicates with each of the frames ( 51 . 52 ) one over the upper strut ( 3 ) of the respective framework ( 51 . 52 ) protruding upper section ( 1b ), and the upper section ( 1b ) of the first frame ( 51 ) has a different length than the upper section ( 1b ) of the second framework ( 52 ).

As a further development, the head tube of the first frame as such differs in length from the head tube of the second frame, preferably only in length. The length of the control tube is preferably varied in accordance with the variation in the position of the control tube described in d). In this case, the length is varied so that the variation in height direction is compensated, the length variation thus compensates for the height position variation, and for the different frames respectively equal length front forks and equal-sized front wheels can be used.

The references to the aspects of the invention in parentheses above refer to the embodiments explained below, but do not limit the particular aspect of the invention, they are only for the convenience of understanding.

Advantageous features are also described in the subclaims and their combinations.

Hereinafter, embodiments of the invention will be explained with reference to figures. The features disclosed in the exemplary embodiments form, individually and in each combination of features, the subject-matters of the claims and also the embodiments described above, and also the further aspects of the invention, advantageously. Show it:

1 a wheeled vehicle with a pedal crank and electric drive in a side view,

2 a frame of the wheeled vehicle in side view,

3 a rear part of the wheeled vehicle in a longitudinal section,

4 the pedal crank drive in the area of the crank in a longitudinal section,

5 a rear wheel of the wheeled vehicle in the region of the rear hub in a longitudinal partial section,

6 a double pinion consisting of a crank crank pinion and an engine rear pinion,

7 an electric motor of the electric drive in a longitudinal section,

8th a modified electric motor of the electric drive in a longitudinal section,

9 a motor coupling in an alternative embodiment,

10 an advanced pedal drive,

11 a first frame of a bicycle frame system,

12 a second frame of the bicycle frame system,

13 a third frame of the bicycle frame system,

14 the covered frame of the bicycle frame system,

15 a wheeled vehicle with a fork in a side view and

16 the wheeled vehicle 15 in a vertical plan view.

1 shows a wheeled vehicle with a pedal crank and electric drive using the example of a bicycle. On a frame of the wheeled vehicle, a front wheel A and a rear wheel B are suspended. The wheeled vehicle has a pedal crank drive with a crank 10 that have a crank pinion 11 , an example formed by a chain traction means 12 and a crank rear sprocket 13 the rear wheel B can rotate. The wheeled vehicle also has an electric drive with an electric motor 20 who has an in 1 unrecognizable motor pinion, an exemplified as preferred as a toothed belt traction means 22 and an engine rear sprocket 23 also the rear wheel B can drive. The electric motor 20 is in the in 1 seen side view disposed within a rear frame triangle of the frame. D denotes a display for the driver.

The frame comprises a seat or seat tube in a manner known per se 1 , a head tube 2 , an upper strut 3 preferably in the form of a top tube and a lower strut 4 preferably in the form of a down tube, an upper rear strut 5 and a lower rear wheel strut 6 , The seat tube 1 divides the frame into a front structure, on which the front wheel A is suspended, and a rear frame, on which the rear wheel B is suspended. The front is designed as a front frame and the rear end as the already mentioned frame triangle.

The front frame thus form the seat tube 1 , the head tube and the struts 3 and 4 , The rear frame triangle is from the seat tube 1 and at least essentially the rear wheel struts 5 and 6 educated. The aspiration 3 to 6 are with the seat tube 1 firmly and rigidly connected, preferably in each case by means of welded connection. The aspiration 3 and 4 are with the head tube 2 also firmly and rigidly connected, preferably in each case by means of welded connection. The front frame 1 - 4 has one from the seat tube 1 , the head tube 2 and the pursuit 3 and 4 framed, exemplary four-sided surface, in which a power source, preferably in the form of a rechargeable electric accumulator, for supplying electrical consumers, at least the electric motor 20 , arranged with electrical energy. The power source is in a shaped to the framed surface shaped power source housing 9 added. The power source housing 9 fills the vast majority of the framed area of the front frame 1 - 4 Accordingly, it can be made axially, parallel to the axes of rotation of the wheels A and B, in a small thickness, so that it does not hinder the driver when pedaling. Its measured between the outer sides of axial thickness, which is preferably constant over the entire side surface, is advantageously at most 10 cm. The thickness is preferably at most four times, better still at most three times the thickest of the frame parts 1 to 4 of the front frame 1 - 4 ,

2 shows the frame as such, detached from the wheeled vehicle, also in side view. Visible are a bottom bracket shell 7 as exemplified at the lower end of the seat tube 1 is arranged and on which the seat tube 1 , the sub strut 4 and the lower rear strut 6 collide. The seat tube 1 and the struts 4 and 6 are with the bottom bracket shell 7 each firmly and rigidly connected, preferably each welded. The rear wheel struts 5 and 6 run towards the axis of rotation R _{B of} the rear wheel B towards each other and are in the immediate vicinity of the axis of rotation R _B via a suspension structure 8th having a downwardly open eye for receiving the rear wheel axle, fixedly connected together, preferably with the suspension structure 8th each welded. On the other side of the rear wheel B are two such rear struts 5 and 6 with just that suspension structure 8th arranged, however, in the side view because of the overlap with the illustrated right struts 5 and 6 are not recognizable. In the area of the front frame 1 to 4 are also attachment points for the housing of the power source 9 recognizable. Attachment points are each on the seat tube 1 and the pursuit 3 and 4 provided, the head tube 2 is free of attachment points.

The electric motor 20 is how in 1 recognizable by means of a support device both on the upper rear wheel strut 5 as well as on the lower rear strut 6 supported, creating a solid and rigid support of the electric motor 20 is guaranteed. As in 2 The support device is recognizable in two parts and comprises an upper support 41 and one from the upper pillar 41 separate lower support 42 , The electric motor 20 is with both supports 41 and 42 and by means of the upper support 41 firmly with the upper rear strut 5 and by means of the lower support 42 firmly with the lower rear wheel support 6 connected. Exemplary are the supports 41 and 42 with the respective rear strut 5 and 6 connected by screw connection. The support device 41 . 42 is by dividing into upper pillar 41 and lower support 42 subdivided such that seen in the side view, the upper strand of the traction device 12 that the crank 10 coupled with the rear wheel B, within one between the supports 41 and 42 free space runs. The traction device 12 is in 2 indicated by dashed lines.

The pillars 41 and 42 are each with several slots 43 provided, for example, each with two slots 43 , The long holes 43 serve to attach the electric motor 20 and allow it, the electric motor 20 in the assembled state, only after loosening its attachment to the supports 41 and 42 , relative to the columns 41 and 42 to adjust.

3 shows the rear part of the wheeled vehicle in a longitudinal section which extends through the axis of rotation R _{B of} the rear wheel B, the motor axis R ₂₀ and the pedal crank axis R ₁₀ and extends straight between the axes of rotation. It can be seen that the electric motor 20 as preferred, but nevertheless only by way of example, not only in the side view of 1 but also axially, parallel to the axes of rotation of wheels A and B, between which the engine 20 supporting rear struts 5 and 6 protrudes, with these axially so overlaps in the transverse direction Y of the wheeled vehicle. The the electric motor 20 with the rear wheel B torque transmitting coupling motor coupling, the motor pinion 21 , the traction means 22 and the engine rear sprocket 23 is formed, is axially adjacent to the pedal crank, formed by the pedal crank pinion 11 , the traction means 12 and the crank rear sprocket 13 , the rear wheel B closer than the pedal crank 11 - 13 arranged. The pedal crank 12 runs further outward than the engine traction means 22 , The electric motor 20 however, protrudes axially outward on the pedal crank 12 out before. Exemplary as preferred is the entire electromagnetic part of the electric motor 20 outside in front of the traction means 12 , As a result, a motor shaft extends 35 that with the motor pinion 21 a turning unit forms, from the outside on the pedal crank 12 in the direction of the rear wheel B addition.

The electric motor 20 is how best in 1 recognizable, arranged in the rear frame triangle B, the axis of rotation R _{B of} the rear wheel B so close that it is connected to the upper run of the pedal crank means 12 also overlaps in the side view, so between the columns 41 and 42 extending section of the traction device 12 axially overlapped on the outside. Because of this, the rotation axis R _B near arrangement, the connection between the electric motor 20 and the upper rear strut 5 and also the connection with the lower rear strut 6 be executed in a small length, reflecting the rigidity of the holder of the electric motor 20 benefits. The two supports 41 and 42 are like 2 shows, short stubby. Due to the division of the support device 41 . 42 can be a housing of the electric motor 20 axially on its inner side facing the rear wheel B until it is in the immediate vicinity of the pedal crank pull means 12 pass. The traction device 12 Not only in the side view, but also seen axially between the columns 41 and 42 through, at least with part of its axial width. The electric motor 20 is the rotation axis R _{B of} the rear wheel B arranged so close and radially seen to the motor axis R ₂₀ so narrow that it is outside the pedal circle and when pedaling not with the crank 10 can come into contact. Arrangement and dimension of the electric motor 20 are advantageously chosen so that it does not come into contact with the foot of the driver standing on the pedals when pedaling. In this regard comes the electric motor 20 its small axial thickness benefit. Its axial thickness is only a few centimeters, preferably less than 10 cm. Favorable in this regard, in addition to the small thickness and the arrangement of the engine coupling 21 - 23 inside of the pedal crank coupling 11 - 13 ,

4 shows a bottom bracket of the wheeled vehicle in a rotation axis R ₁₀ containing longitudinal section. The two cranks 10 are over one through the bottom bracket shell 7 leading crankshaft 15 torque transmitting interconnected. The torque of the cranks 10 gets on the pedal crankshaft 15 united and in a drive direction of rotation via a pedal crank 14 on the pedal crank 11 transfer. The freewheel transmits against the driving direction of rotation 14 apart from unavoidable frictional forces no torque. The pedal crank pinion 11 can thus in the drive direction of rotation, although faster than the pedal crankshaft 15 but do not rotate relative to the direction of rotation of the drive.

5 shows the central region of the rear wheel B in a longitudinal section. Shown is only one half of the longitudinal section. The rear wheel B is with its wheel axle 16 in the frame 1 - 8th formed suspension, for example, the suspension structure 8th ( 2 ), and received by means of a left and a right securing element 17 , which can be formed as usual as threaded nuts secured. In a hub 18 the rear wheel B is a variable transmission 19 arranged in the form of a switchable transmission. The gear 19 is as preferred, although only exemplary, designed as a planetary gear. The two rear sprockets 13 and 23 are torsionally rigid with a common transmission input member 19a of the transmission 19 connected so that the pinions 13 and 23 with the transmission input member 19a how to turn a turntable together when over the pedal crank pinion 13 a torque of the pedal crank 10 or over the engine rear sprocket 23 a torque of the electric motor 20 works or works. The relative to the frame 1-8 non-rotatable wheel axle 16 forms the support or actuator of the transmission 19 and the wheel hub 18 the relatively rotatable output member. Because the engine 20 the rear wheel B via its internal gear 19 drives, the speed of the engine can 20 be reduced again, in addition to preferably only single-step reduction within the engine coupling 21 - 23 , The reduction ratio according to the pedal crank drive even variable, selectable.

In 6 are the rear sprockets 13 and 23 shown as such in the unassembled state. The pinions 13 and 23 are united into one unit. They form an assembly unit with each other and with the transmission input member 19a in the assembled state, a rotary unit. They are screwed together by way of example, but could alternatively, for example, also integrally connected to one another and, as far as production technology possible, also be formed in one piece. In the exemplary embodiment, the motor rear sprocket is used 23 the attachment of the two pinions 13 and 23 formed double pinion 13 . 23 , The crank rear sprocket 13 is on the inside engine rear sprocket 23 screwed. For the purpose of the rotationally fixed connection with the common transmission input member 19a has the double pinion 13 . 23 , In the embodiment, the engine rear sprocket 23 , Noses projecting on an inner side inwardly in the direction of the axis of rotation R _B 24 on, in corresponding axial grooves of the transmission input member 19a engage, and engaged the torque form-fitting in the transmission input member 19a initiate. The rear wheel B may be a conventional, since it requires no adaptation to the electric drive. The crank rear sprocket 13 may in particular be a conventional pedal crank pinion.

In reversal of the mounting conditions can be in an alternative double pinion 13 . 23 the crank rear sprocket 13 the mounting pinion and the rear wheel pinion 23 only over the pinion 13 with the transmission input member 19a be connected or become. In the usability of a conventional pedal crank pinion 13 may in the alternative embodiment, the engine rear sprocket 23 be simplified. Because the crank rear sprocket 13 usually a steel pinion and the motor rear sprocket 23 preferably a light metal pinion is, for example, aluminum or an aluminum alloy, the reversal would also be in terms of resilience advantage.

Because of the output of the pedal crank drive and also the motor drive on the same transmission input member 19a becomes the manual transmission 19 , the hub gear, used equally for both drives. Another advantage for handling is that the driver only has to deal with a single circuit. On the axis of rotation R _{B of} the rear wheel B and no freewheel is arranged, the pedal crank 14 and also a motor freewheel are moved away from the axis of rotation R _B. This has the advantage that in the next to the wheel hub 18 limited space available no freewheel must be accommodated, whereby the integration of pedal drive and electric drive is facilitated.

The engine rear sprocket 23 has at its outer periphery a toothing with a much finer tooth pitch than the pedal crank rear sprocket 13 on. The toothing of the pinion 23 In preferred embodiments, it has a modulus d / z <1.2, where d is the diameter of the pitch circle and z is the number of teeth of the pinion 13 are. Small, especially short teeth are advantageous for reducing wear and noise in the engine coupling 21 . 22 and 23 , As traction means 22 An advantageously flat timing belt can be used. Preferably, a carbon belt, so a carbon fiber reinforced plastic belt is used.

7 shows the electric motor 20 as such, detached from the frame 1 - 8th in a longitudinal section containing the motor axis R ₂₀ . The electric motor 20 includes a mounted state with the frame 1 - 8th namely about the columns 41 and 42 firmly with the rear struts 5 and 6 ( 1 ) connected stator 25 and one relative to the stator 25 around the motor axis R ₂₀ rotatable rotor 30 , The rotor 30 includes a rotor carrier 32 for a pole ring 31 , The rotor carrier 32 forms a pole ring 31 radially surrounding return ring 32 , The pole ring 31 is formed by a plurality of permanent magnets distributed over the circumference in alternating pole sequence are arranged, for example on an inner side of the return ring 32a , The pole ring 31 immediately surrounds a coil part 26 , ie the field winding, of the stator 25 leaving a narrow annular gap. The return ring 32a is at an axial end via a connecting portion 32b with a rotor shaft 33 rotatably connected in relation to both directions of a rotational movement about the motor axis R ₂₀ .

The rotor 30 makes a rotor pot. The return ring 32a forms in the area of the pole ring 31 a peripheral wall and with its side facing away from the rear wheel B connecting portion 32b a bottom of the rotor pot. Specifically, make the return ring 32a , the connection section 32b and the rotor shaft fixed therewith 33 a ring pot. The motor shaft 35 extends into this ring pot, for example, by the ring pot, namely in or through the rotor shaft 33 , The coil part 26 is fixed, not movable, with one of the attachment of the electric motor 20 at the frame 1 - 8th Serving stator 27 connected. The stator carrier 27 has a central, sleeve-shaped carrier region, on the outer circumference of the coil part 26 is arranged, and one of the central support portion radially outwardly disc-shaped projecting flange on, in the region of the electric motor 20 with the support device 41 . 42 is connected or can be mounted. In the flange area are several mounting elements 28 , exemplary passages for screws, arranged around the engine 20 by means of further mounting elements, for example nuts, with the support device 41 . 42 releasably connect.

The rotor shaft 33 extends from the rear wheel B from axially outward connecting portion 32b of the return ring 32 So from the ground 32b of the rotor pot 31 - 33 in the central support region of the stator cover 27 into and is there on the stator 27 by means of pivot bearings 36 rotatably supported. The rotor shaft 33 has a connecting flange 33a in whose area they connect with the connecting section 32b of the rotor carrier 32 firmly but detachably connected, by way of example screwed. The pivot bearings 36 are in an annular gap between the rotor shaft 33 and the rotor shaft 33 surrounding central carrier region of the stator carrier 27 arranged. The rotor shaft 33 extends as preferred by way of example by the stator 27 and toward the rear wheel B via the stator carrier 27 out. The motor shaft 35 extends through the rotor shaft 33 and is at its outer axial end by means of a securing element 40 , by way of example a circlip, relative to the rotor shaft 33 axially secured. Inside secures another such fuse element 40 the rotor shaft 33 at the local pivot 36 , The security elements 40 are preferably solvable. In the annular gap between the two waves 33 and 35 is a motor freewheel 34 arranged. The engine freewheel 34 transmits the torque of the electric motor 20 in a drive direction of rotation on the motor shaft 35 , transmits of unavoidable frictional forces but no torque in the reverse direction of rotation. The engine freewheel 34 is in an annular gap between the motor shaft 35 and the surrounding rotor shaft 33 arranged. The freewheel 34 can be formed in particular as a sleeve freewheel. For advantageous features of the engine freewheel 34 will be exemplified again the already mentioned WO 2009/127263 A1 and PCT / EP2009 / 055308 referenced. The motor shaft 35 is about the engine freewheel 34 as well as a left and a right thrust washer 37 on the rotor shaft 33 supported. The motor pinion 21 is with the motor shaft 35 rotatably connected, thus forms with this a rotary unit. With 38 are one the gap with the freewheel 34 sealing left and right sealing element 38 designated.

The stator 25 and the rotor 30 directly form the housing of the electric motor 20 , This has no further housing structure for covering the coil part 26 and the pole ring 31 , More specifically, form part of the rotor 30 the rotor carrier 32 and the rotor shaft 33 and on the part of the stator 25 its stator carrier 27 the motor housing. The one from the rotor carrier 32 and the rotor shaft 33 formed Rotortopf is in this embodiment of the housing an outer rotary housing, resulting in the operation of the electric motor 20 rotates. The stator carrier 27 forms in particular with its flange a stator cover 27 for the rotor pot rotating relative to it during engine operation 32 . 33 , In addition, a nested arrangement of rotor shaft results in the central area 33 and the sleeve-shaped central region of the stator 37 ,

For the outer sealing of the rotor pot 32 . 33 and stator cover 27 The motor housing formed by the rotor pot and the stator cover and a contact-free acting shaft seal. The shaft seal is from a surrounding around the motor axis R ₂₀ sealing ridge 29 of the stator 25 and a sealing web sealingly cooperating therewith 39 of the rotor 30 educated. The sealing bar 29 is at the flange area of the stator carrier 27 radially outwardly formed circumferentially. The sealing bar 39 of the rotor 30 forms a free outer peripheral edge of the peripheral wall 32a of the rotor pot 32 . 33 , The sealing bar 29 has circumferentially one to the sealing bar 39 towards open groove, a sealing groove into which the sealing ridge 39 protrudes, so to speak immerses. The sealing webs 29 and 39 Cooperatively make a labyrinth seal. It should be noted that the sealing bar 39 of the rotor 30 in the axial direction in the corresponding facing sealing groove of the sealing ridge 29 protrudes. Due to this orientation of the shaft seal 29 . 39 can the peripheral wall 32a of the ring pot 32 . 33 on its inside simply axially to the free end, the sealing bar 39 out, smooth out, causing the Attachment of the pole ring 31 or the individual, the pole ring 31 forming magnets on the inside of the peripheral wall 32 is relieved. The provision of the motor housing directly through the stator 25 and the rotor 30 contributes to the reduction of the electric motor 20 at. The diameter of the pole ring 31 can be as big or nearly as big as the outside diameter of the electric motor 20 be. The ratio of the electromagnetically relevant diameter, here the pole ring 31 , to the outer diameter of the motor housing can be maximized. This allows the rated torque of the electric motor 20 be increased at given external dimensions, which in turn allows a reduction of the speed and thus a simpler adaptation of the electric drive to the pedal drive.

8th shows a modified electric motor 20 , For functionally identical engine components, the reference numerals of the engine 20 of the 7 used. The modified engine 20 gives way to the formation of the rotor pot 32 . 33 from the engine 20 of the 7 more specifically, regarding the connection of rotor arm 32 and rotor shaft 33 , The connecting section 32b of the rotor carrier 32 overlaps the connecting flange of the rotor shaft 33 namely axially outside. The connecting flange is therefore to distinguish with 33b designated. Due to the modification, the rotor carrier 32 complete with pole ring 31 after releasing the connection with the connecting flange 33b , wherein the compound is formed again by way of example as a screw, just axially stature 25 be deducted to the outside. This facilitates maintenance and repair work, for example, on the coil part 26 or pole ring 31 , The stature 25 can do this on the frame 1 - 8th remain. The arrangement allows for the provision of different pole rings 31 or complete pole ring and rotor carrier units 31 . 32 also a simple and flexible conversion of the engine 20 , So can the pole ring 31 individually or in a unit of pole ring 31 and rotor carrier 32 be made available in different variants, the variants may differ by the strength of the magnets used. The customer can change the power of his engine 20 subsequently simply by replacing the originally weaker increase by a stronger variant. He also has the same choice when buying, with the pole ring 31 , preferably the manufacturer made available unit of pole ring 31 and rotor carrier 32 , can be installed at the dealer or ordered accordingly.

The assembly is also modified. The mounting elements 28 at the engine 20 of the 7 , easy passages in the stator 27 were, were by preferably fixedly connected to the stator mounting members 28a replaced by the stator 27 protrude inward towards the rear wheel and are exemplified by screws. The motor 20 becomes during assembly on the support device 41 . 42 by means of the mounting elements 28a positioned, with the mounting elements 28a corresponding passages of the support device 41 . 42 project through. Subsequently, the mounting elements 28a by means of cooperating further mounting elements 28b , exemplary screws, secured and the engine 20 is thereby attached to the support means. Except for the differences explained corresponds to the modified engine 20 the engine 20 of the 7 ,

The motor pinion 21 is easily replaceable. This is not only beneficial for maintenance and repair, but also facilitates adaptation of the level of engine assistance to the needs of the user. For the adaptation, motor pinions 21 held in different sizes or numbers of teeth and locally, at the dealer or user, installed or replaced. For easy replacement, the motor shaft 35 detachably mounted. For the solubility ensures the outer fuse element 40 on the side of the electric motor facing away from the rear wheel 20 , in the 7 and 8th each left of the stator-rotor assembly 25 . 30 is arranged easily accessible detachable. The outer fuse element 40 can be formed in particular by a snap ring, which can be moved against its own spring force from its seat. Preferably, both security elements 40 detachable, for example, each formed as a snap ring. After loosening the outer fuse element 40 can the motor shaft 35 together with the anti-rotation with the shaft 35 connected motor pinion 21 just to the side of the engine pinion 21 out of the engine 20 , in the example from the rotor shaft 33 , to be pulled. The engine freewheel 34 remains in the engine 20 or the rotor shaft 33 , Subsequently, a motor shaft 35 with another motor pinion 21 instead inserted again and by means of the outer fuse element 40 be secured. In the selected arrangement of the electric motor 20 overlapping with the rear wheel becomes the shaft 35 pulled off through the spokes of the rear wheel and the shaft with the new pinion 21 inserted through the spokes of the rear wheel. The rear wheel can indeed, but this does not need to be removed.

For easy replacement of the engine pinion 21 is also the attachment of the electric motor 20 by means of the oblong holes 43 ( 2 ) advantageous. This attachment allows to change the distance that the axis of rotation R _{20 of} the motor 20 from the axis of rotation R _{B of} the rear wheel B to adjust, by means of the slots 43 and the cooperating mounting elements, such as the mounting elements 28a and 28b , caused attachment of the electric motor 20 at the supports 41 and 42 relaxed but not resolved. in the loosened, still on the supports 41 and 42 held, now along the slots 43 guided state can be the electric motor 20 and together with the motor pinion 21 in the direction of the longitudinal extent of the slots 43 be adjusted, for example, the tension of the traction device 22 to adjust or adaptation to different sizes of motor pinion 21 make. The wave 35 can with the pinion 21 out of the engine 20 to be pulled. After inserting the previous or preferably a new motor shaft 35 with a new pinion 21 will this wave 35 by means of the outer securing element 40 secured and the engine 20 still with the supports 41 and 42 existing, only loosened engagement in the oblong holes 43 adjusted until a sufficient tension of the traction device 22 is made. Finally, the engine by means of mounting elements, for example by means of the mounting elements 28a and 28b , in holding engagement with the supports 41 and 42 secured again.

In 9 is one for engine coupling 21 . 22 and 23 shown alternatively usable engine coupling, which is not formed as a traction mechanism, but as a spur gear. The spur gear comprises an externally toothed motor pinion 21 ' and an engine rear wheel pinion meshed therewith 23 ' , which alone together form the alternative engine coupling. Both engine couplings, the preferred engine coupling 21-23 on the one hand and also the engine coupling 21 ' . 23 ' On the other hand, are one-stage. The speed of the electric motor 20 is in each case stocky in only a single gear and about the respective engine rear sprocket 23 or 23 ' , which simultaneously forms the transmission output pinion, on the transmission input member 19a ( 5 ) transfer. The design of the electric motor 20 as external rotor motor allows such a simple engine coupling with reduction in only a single gear stage.

10 shows an alternative crankshaft drive, where in the area of the crank 10 a transmission gear, by way of example as preferred a planetary gear, is integrated. The transmission may preferably be switchable or simply with always the same translation, the speed of the pedal crankshaft 15 on the pedal crank 11 transfer. The transmission gear is in the torque flow between the pedal crankshaft 15 and the pedal crank 11 arranged and thus transmits the torque of the pedal crankshaft 15 on the pedal crank 11 , Between crankshaft 15 and crank pinion is on the axis of rotation R ₁₀ again a freewheel 14 ' arranged.

The 11 . 12 and 13 show three frames 51 . 52 and 53 a frame system. The frames differ only in a few features from each other. In particular, those of the respective seat tube 1 , the respective head tube 2 and the respective pursuit 3 and 4 framed, in the frame free areas of the front frame with the exception of a small area directly at the head tube 2 congruent, so congruent. The frames differ in terms of the framed surfaces, only by the arrangement of the respective head tube 2 from each other. The difference is that the head tube 2 moved parallel to itself, leaving the head tube 2 of the upper frame 51 the seat tube 1 the same frame is closer than the head tube 2 of the middle frame 52 and the head tube 2 of the lower frame 53 the seat tube 1 of the same frame. This results in three different frame sizes, the upper frame 51 as the smallest, the middle frame 52 as the frame of medium size and the lower frame 53 as the largest frame.

In the presentation of the 14 are the frames 51 . 52 and 53 of the system brought to coincidence.

In the different frames of the system, the rear frame triangles are equal to each other. The bottom bracket shell 7 is arranged in the same place and in the same way. The seat tube 1 points over its frame section 1a between the bottom bracket shell 7 and the attachment of the upper strut 3 as well as the upper rear strut 5 each the same length. Furthermore, the angles under which the struts 3 and 4 of the front frame on the seat tube 1 run, at all frames 1 to 8th the same. Different are, as I said, the positions of the head tube 2 where the angles at which the struts 3 and 4 on the head tube 2 run, each is the same. The control tubes 2 are offset in the direction of travel X and in the height direction Z parallel to each other.

The control tubes 2 are optionally different lengths. The difference in length compensates for the difference in height direction Z, so that identical or only equal length front forks and equally sized front wheels A can be used. Furthermore, the above the rear frame triangle and above the front frame protruding seat tube sections 1b different lengths, so that the seat or saddle at the frame 53 can be set higher than the frame 52 and whose seat can be raised higher than that of the frame 51 ,

By means of the different frames of the system, by way of example three different frames, the wheeled vehicle can be adapted very simply and inexpensively to drivers of different sizes with otherwise unchanged components.

In the 11 to 14 is also the power source, more precisely, the housing 9 the power source, shown. Because of the congruence of the front frame, congruence right up to the close range of the head tube 2 , can be the same power source or the same power source housing for all different frames 9 be used because the remaining free area of the front frame of the respective seat tube 1 Starting close to the respective head tube 2 and thus over the vast majority of this frame area is the same for all different frames according to size and shape.

15 shows a bicycle in a side view, which is provided for retrofitting the electric drive according to the invention. The electric motor 20 still needs to be mounted, the power source housing 9 is already mounted. From the power source housing 9 and the frame 1 - 8th Apart from a conventional bike in the manner of a mountain bike. At the frame 1 - 8th it is one of the frames 51 to 53 of the basis of the 11 to 14 framework, which includes the frame of the bicycle 1 to 3 belongs. The front fork 50 is a suspension fork, unlike the rigid fork of the bicycle 1 , The two frames, the bicycle of the 1 and that of the bicycle 15 , you can do the same, for example one frame at a time 51 be.

16 shows the bike the 15 in a top view from above. The top view shows how slim the power source housing 9 due to its large side surface can be. In the example, it has an axially measured width over all that is less than three times the thickness of the top strut 3 is.

LIST OF REFERENCE NUMBERS

1

seat tube

1a

Seat tube section

1b

Seat tube section

2

head tube

3

upper strut

4

under strut

5

upper rear strut

6

lower rear strut

7

bottom bracket

8th

suspension structure

9

power source

10

crank

11

Tretkurbelritzel

12

traction means

13

Crank-rear sprocket

14

Tretkurbelfreilauf

15

pedal crankshaft

16

rear axle

17

fuse element

18

hub

19

transmission

20

electric motor

21

pinion

22

traction means

23

Engine rear sprocket

24

nose

25

stator

26

Coil part, winding

27

Stator carrier, stator cover

28

mounting element

28a

mounting element

28b

mounting element

29

Statordichtsteg

30

rotor

31

pole ring

32

rotorarm

32a

Circumferential wall, return ring

32b

Floor, connecting section

33

rotor shaft

33a

connecting flange

33b

connecting flange

34

Coasting

35

motor shaft

36

camp

37

thrust washer

38

poetry

39

Rotor sealing land

40

fuse element

41

support

42

support

43

Long hole

44-49

50

front fork

51

first frame

52

second frame

51

third frame

A

front

B

rear wheel

D

display

D ₂₀

motor thickness

R _B

Rotary axis of the rear wheel

R ₂₀

Rotary axis of the electric motor

R ₁₀

Rotary axis of the crank

X

direction of travel

Y

Transverse direction, axial direction

Z

height direction

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• US 4541500 B [0002, 0002]
• US 5242335 B [0002]
• WO 2009/127263 A1 [0025, 0026, 0086]
• EP 2009/055308 [0025, 0086]

Claims (22)

Cranked and electric wheeled vehicle comprising: a) a pedal ( 10 ) for the conversion of muscle power into torque, b) a pedal crank coupling ( 11 - 13 ) for transmitting the torque of the pedal ( 10 ) on the rear wheel (B), c) an electric motor ( 20 ) with a stator ( 25 ) and a rotor ( 30 ) d) and a motor coupling ( 21 - 23 ) for transmitting a torque of the electric motor ( 20 ) on the rear wheel (B), e) the rotor ( 30 ) a rotor pot ( 31 . 32 . 33 ) with a floor ( 32b ) and a peripheral wall ( 32a ) and the stator ( 25 ) with its bottom ( 32b ) at one end face and with its peripheral wall ( 32a ) circumferentially surrounds, f) and wherein a during operation of the electric motor ( 20 ) with the stator ( 25 ) Electromagnetically co-operating rotor part ( 31 . 32 ) on the peripheral wall ( 32a ) of the rotor pot ( 31 . 32 . 33 ) is arranged or forms, characterized in that g) the rotor pot ( 31 . 32 . 33 ) during operation of the electric motor ( 20 ) rotating outer housing of the electric motor ( 20 ). Wheeled vehicle according to the preceding claim, characterized in that the stator ( 25 ) the rotor pot ( 31 . 32 . 33 ) watertight. Wheeled vehicle according to one of the preceding claims, characterized in that at the rear wheel (B), preferably in a hub ( 18 ) of the rear wheel (B), a variable, preferably switchable transmission ( 19 ), preferably a planetary gear, with a transmission input shaft ( 19a ) and both the pedal ( 10 ) as well as the electric motor ( 20 ) on the transmission ( 19 ), preferably on the transmission input shaft ( 19a abort. Wheeled vehicle according to one of the preceding claims, characterized in that the pedal cranking coupling ( 11 - 13 ) rotatable about the axis of rotation (R _B ) of the rear wheel (B), by means of the crank ( 10 ) drivable pedal rear sprocket ( 13 ) and additionally the engine coupling ( 21 - 23 ) rotatable about the axis of rotation (R _B ), by the electric motor ( 20 ) drivable rear wheel pinion ( 23 ), wherein the rear wheel pinion ( 13 . 23 ) are arranged in a preferred embodiment on the same side of the rear wheel (B) axially side by side and preferably form a rotary unit with respect to a driving direction of rotation and the reverse direction of rotation. Wheeled vehicle according to one of the preceding claims, characterized in that the engine coupling ( 21 - 23 ) one from the rotor ( 30 ) in a driving direction rotatably driven motor output pinion ( 21 ), a about the rotational axis (R _B ) of the rear wheel (B) rotatable engine rear sprocket ( 23 ) and one the pinions ( 21 . 23 ) belt ( 22 ), preferably a fiber reinforced plastic toothed belt. Wheeled vehicle according to one of the preceding claims, characterized in that the pedal crank ( 10 ) and the electric motor ( 20 ) on the same side of the rear wheel (B) abort. Wheeled vehicle according to one of the preceding claims, characterized in that the torque of the electric motor ( 20 ) via a of the rotational axis (R _B ) of the rear wheel (B) pulled off engine freewheel ( 34 ) or the torque of the crank ( 10 ) via a from the axis of rotation (R _B ) of the rear wheel (B) pulled down pedal-free running ( 14 ) is or can be transferred to the axis of rotation (R _B ) of the rear wheel (B). Wheeled vehicle according to one of the preceding claims and at least one of the following features: (i) an axis of rotation (R ₂₀ ) of the electric motor ( 20 ) seen in a side view of the wheeled vehicle, the axis of rotation (R _B ) of the rear wheel (B) closer than a seat tube ( 1 ) of the wheeled vehicle; (ii) the electric motor ( 20 ) overlaps in a side view of the wheeled vehicle with the pedal crank ( 11 - 13 ), preferably with a traction means ( 12 ) of the pedal crank coupling ( 11 - 13 ). Wheeled vehicle according to one of the preceding claims, characterized in that the engine coupling ( 21 - 23 ) axially between the rear wheel ( 13 ) and the pedal crank ( 11 - 13 ), the stator ( 25 ) and the rotor ( 30 ) seen from the rear wheel (B) axially outward than the pedal crank ( 11 - 13 ) are arranged and a motor shaft ( 36 ) of the electric motor ( 20 ) from the outside in the direction of the rear wheel (B) via the pedal crank ( 11 - 13 protrudes). Wheeled vehicle according to one of the preceding claims, characterized in that the electric motor ( 20 ) by means of a support device ( 41 . 42 ) supported on the wheeled vehicle and with the support device ( 41 . 42 ) in one intervention ( 28 . 43 ; 28a . 28b . 43 ), which can be loosened so that the electric motor ( 20 ) in the relaxed, but still existing engagement relative to the support device ( 41 . 42 ) is movable and blockable in at least one of a plurality of different positions, preferably non-positively. Wheeled vehicle according to one of the preceding claims, comprising a suspension of a Front wheel (A) and a rear wheel (B) serving frame ( 1 - 8th ) with a seat tube ( 1 ), an upper rear strut ( 5 ) and a lower rear strut ( 6 ), which for suspension of the rear wheel (B) with each other at least substantially a frame triangle ( 1 . 5 . 6 ) on which the electric motor ( 20 ) and seen in a side view of the wheeled vehicle preferably within the frame triangle ( 1 . 5 . 6 ) is arranged. Wheeled vehicle according to the preceding claim, characterized in that the electric motor ( 20 ) by means of an upper support ( 41 ) on the upper rear strut ( 5 ) and by means of one of the upper support ( 41 ) preferably separate lower support ( 42 ) on the lower rear strut ( 6 ) is supported, wherein a traction means of the preferably formed as a traction mechanism pedal crank coupling ( 1 - 14 ) seen in the side view in a preferably between the supports ( 41 . 42 ) remaining free space extends. Wheeled vehicle according to one of the two preceding claims, characterized in that the electric motor ( 20 ) by means of an upper support ( 41 ) on the upper rear strut ( 5 ) and by means of one of the upper support ( 41 ) preferably separate lower support ( 42 ) on the lower rear strut ( 6 ), the stator ( 25 ) and the rotor ( 30 ) of the electric motor ( 20 ) seen from the rear wheel (B) axially further outward than the supports ( 41 . 42 ) are arranged and a motor shaft ( 35 ) of the electric motor ( 20 ) through or between the supports ( 41 . 42 ) extends in the direction of the rear wheel (B). Electric motor for driving a wheeled vehicle, preferably a wheeled vehicle which can also be driven by muscle power, the electric motor ( 20 ) comprising: a) a stator ( 25 ) b) and a rotor ( 30 ) with a rotor pot ( 31 . 32 . 33 ), which has a floor ( 32b ) and a peripheral wall ( 32a ) and the stator ( 25 ) with its bottom ( 32b ) at one end face and with its peripheral wall ( 32a ) surrounds the outer circumference, c) wherein, during operation of the electric motor ( 20 ) with the stator ( 25 ) Electromagnetically co-operating rotor part ( 31 . 32 ) on the peripheral wall ( 32a ) of the rotor pot ( 31 . 32 . 33 ) is arranged or forms, characterized in that d) the rotor pot ( 31 . 32 . 33 ) during operation of the electric motor ( 20 ) rotating outer housing of the electric motor ( 20 ) e) and the stator ( 25 ) a the Rotortopf ( 31 . 32 . 33 ) watertight sealing stator cover ( 27 ). Electric motor according to the preceding claim, characterized in that the stator ( 25 ) the floor ( 32b ) of the rotor pot ( 31 . 32 . 33 ) axially opposite the stator cover ( 27 ) for the Rotortopf ( 31 . 32 . 33 ). Electric motor according to the preceding claim, characterized in that the stator ( 25 ) a stator carrier ( 27 ) having a central, sleeve-shaped carrier region and a flange region protruding radially outward from the central carrier region, the stator with the flange region has the stator cover ( 27 ) and the rotor pot ( 31 . 32 . 33 ) a rotor shaft ( 33 ) extending from the ground ( 32b ) of the rotor pot ( 31 . 32 . 33 ) extends into the central carrier area and there on the stator ( 27 ) is rotatably supported. Electric motor according to one of the preceding claims, characterized in that the stator ( 25 ) a stator carrier ( 27 ) having a central sleeve-shaped carrier region and a flange region protruding radially outward from the central carrier region, an electromagnetically active stator part ( 26 ) is arranged on an outer circumference of the central support region and the stator ( 25 ) with the flange area a stator cover ( 27 ) for a watertight closure of the rotor pot ( 31 . 32 . 33 ). Electric motor according to one of the preceding claims, characterized in that the stator ( 25 ) and the rotor ( 30 ) with each other about the axis of rotation (R ₂₀ ) of the rotor ( 30 ) circumferentially a shaft seal ( 29 . 39 ), preferably in the manner of a labyrinth seal. Electric motor according to the preceding claim, characterized in that the stator ( 25 ) on the stator cover ( 27 ) a stator sealing bridge ( 29 ) and the rotor ( 30 ) on the peripheral wall ( 32a ) of the rotor pot ( 31 . 32 . 33 ) one the Statordichtichtsteg ( 29 ) axially or radially overlapping rotor sealing web ( 39 ) and preferably at least one of Statordichtichtsteg ( 29 ) and rotor sealing web ( 39 ) circumferentially at least one sealing groove ( 29 ) and the other circumferentially one into the sealing groove ( 29 ) immersed sealing ring ( 39 ), wherein the sealing ring ( 39 ) preferably axially in the sealing groove ( 29 immersed). Electric motor according to one of the preceding claims, characterized in that the electric motor ( 20 ) in the region of the stator cover ( 27 ) on a support device ( 41 . 42 ) of the wheeled vehicle, is mounted or mountable and in preferred embodiments in the region of the stator cover ( 27 ) one or more mounting elements ( 28 ; 28a . 28b ) for the assembly of the electric motor ( 20 ) on the support device ( 41 . 42 ) having. Electric motor according to one of the preceding claims, characterized in that the electric motor ( 20 ) a motor shaft ( 35 ) and the Motor coupling ( 21 - 23 ) on or on the motor shaft ( 35 ) fixed torque motor output pinion ( 21 ), the motor shaft ( 35 ) in a central cavity of the rotor ( 30 ) protrudes or projects through this cavity and relative to the rotor ( 30 ) by means of a detachable axial lock ( 40 ) is axially secured and the axial ( 40 ) outside the cavity, preferably outside of a motor housing ( 27 . 31 . 32 . 33 ) of the electric motor ( 20 ) is arranged. Electric drive comprising a) an electric motor according to one of the preceding claims, b) one of the rotor ( 30 ) in a driving direction rotatably driven motor output pinion ( 21 ), c) a shaft pinion rotatable about the axis of rotation (R _B ) of a shaft to be driven ( 23 ) d) and one of the pinions ( 21 . 23 ) belt ( 22 ), preferably a fiber reinforced plastic toothed belt.

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