EP2323896A1

EP2323896A1 - Electric motorcycle with diamond frame and auxiliary pedal drive

Info

Publication number: EP2323896A1
Application number: EP09778456A
Authority: EP
Inventors: Michael Hecken
Original assignee: Individual
Current assignee: Individual
Priority date: 2008-09-12
Filing date: 2009-09-10
Publication date: 2011-05-25
Also published as: US8657055B2; WO2010028829A1; US20110308871A1; DE102008047087A1; CN102216150A; CN102216150B

Abstract

The invention relates to an electric motorcycle (1) with a frame (2), an electromotive drive (19) and a control unit (16) for controlling the electromotive drive (19). The invention also relates to a method for assembling an electric motorcycle (1), in which at least one energy source (55, 59) is introduced into a frame (2). In order to ensure easy and quick assembly of the electric motorcycle (1), according to the invention said motorcycle (1) comprises an auxiliary pedal drive and the frame (2) is designed as a diamond frame (2) with at least one upper tube (11), at least one lower tube (12) and at least one seat tube (7), wherein the upper tube (11) comprises a receiving shaft (54a) for at least one energy source (55) and is provided at at least one tube end (30) with a push-in opening (22), through which the energy source (55) can be pushed into the receiving shaft (54a). In the method according to the invention at least one energy source (55) is inserted through an open tube end (30) into an upper tube (11) of the frame (2).

Description

Electric motorcycle with diamond frame and pedal auxiliary drive

The invention relates to an electric motorcycle with a frame, an electric motor drive and a control unit for controlling the electric motor drive.

Furthermore, the invention relates to a method for mounting an electric motorcycle in which at least one energy source is introduced into a frame.

Basically, a distinction is made between electric bicycles and electric motorcycles. Electric bicycles have an electric motor auxiliary drive, which serves only to support a muscle-operated pedal drive. Usually, the electric motor auxiliary drive of an electric bicycle is only temporarily switched on when the pedal drive is operated simultaneously.

Electric motorcycles, however, are provided with a stand-alone electric motor drive, which is designed for continuous operation and whose performance allows even without a pedal auxiliary drive speeds of at least 45 km / h.

An electric bicycle, which has an electric auxiliary drive in addition to a pedal drive, is described in DE 2629970 A1. The motor is attached to the seat tube and engages a sprocket in a chain drive of the vehicle, which connects a pedal operated via sprocket with the arranged on the rear wheel drive pinion. The motor is powered by a battery located behind the seat tube and above the rear wheel, and due to a control circuit can only be put into operation when the drive pinion is in rotary motion.

In the electric bicycle shown in DE 2113968 A1, batteries are arranged on a platform which, as part of the frame, connects the front part of the vehicle comprising the handlebar and front fork to the rear part of the vehicle comprising the seat and rear fork. To stabilize the frame is also located above the batteries, a strut which receives bending moments acting between the front and the rear of the vehicle. The arranged in the rear wheel electric motor is connected via a two-stage traction mechanism with the rear wheel. The electric motor drive is controlled by an automatic switching device, which responds to the driving speed of the vehicle. DE 8101827 U1 describes an electric bicycle with shiftable auxiliary engine drive, which is driven by two electric motors connected to the rear tire via friction wheels. The frame of the bicycle has an upper, a lower and a seat tube, wherein in the region above a bottom bracket between the lower and seat tube, an electric battery for driving the electric motors is arranged.

Also, the frame of the electric bicycle shown in EP 0675037 B1 comprises a top, a bottom and a seat tube, wherein the top tube is displaced in the direction of the down tube for easier entry into the bicycle. The electric motor, together with the gearbox, is fastened directly to the rear wheel axle and is supplied with power via a battery mounted on a carrier arranged above the rear wheel. The electric motor is controlled by a measuring device which measures the torque applied to the rear axle via a pedal drive.

From WO 99/26837 an electric bicycle is known in which energy packs for an electric motor are pushed from below or above into the down tube of a diamond frame. This solution is disadvantageous in that it requires structural changes to the frame, in particular in the area of the bottom bracket. The force and moment flow within the framework is thereby impaired.

In DE 30 18 333 an electric bicycle is shown which has an electric auxiliary drive. As can be seen from the drawings, the diamond frame is fitted with accumulators through the lance sleeve and the seat tube, as well as with an electric motor and reduction gear. Such assembly is unwieldy and expensive.

From the prior art known electric motorcycles offer significantly higher speeds of more than 45 km / h at a power of well over 1 kW. Known electric motorcycles are usually provided with a motorcycle frame because of the high power and speeds. Because of the large number of accumulators required to provide the power and their more stable design, electric motorcycles have a high weight, which is usually more than 70 kg. Pedal drives are usually not used in electric motorcycles, since their high weight can be handled only at high speeds and makes it difficult to move about a muscle-powered drive, especially on inclines. Another disadvantage of known electric motorcycles is that these only difficult to transport as they can not be carried by one person or taken on public transport because of their weight and their structure.

Consequently, the object of the invention is to achieve the features of an electric motorcycle with the simplest means and frame constructions.

For the above-mentioned electric motorcycle, the invention solves the problem by the top tube is provided at least one pipe end with an insertion opening through which the energy carrier is inserted into the receiving shaft.

The energy carrier is embodied as an energy-storing element or as an integrally manageable module composed of several energy-storing elements. The energy source preferably stores electrical energy and may include, for example, one or more accumulators. Alternatively, the energy carrier may comprise at least one energy store, for example a tank for storing hydrogen or methanol, and at least one converter, for example a fuel cell for generating electrical energy.

The electric motorcycle according to the invention has the advantage that energy sources for supplying the electric motor drive with electrical energy, such as batteries or accumulators, can be integrated into the top tube. The integration of the energy carriers into the top tube makes it possible to retain the advantages of a diamond frame. In addition, additional holders for energy carriers can be dispensed with, whereby the total weight of the electric motorcycle wheel with a power of more than 1 kW and a maximum speed of more than 80 km / h is significantly reduced. The integrated in the top tube receiving shaft is easily accessible due to the arranged at least one end insertion opening in the mounted state of the electric motorcycle. It can be dispensed with an additional bracket for mounting energy sources on the frame, which assembly costs, material and space can be saved. The top tube can be completely filled with one or more energy carriers, so that a closure on the insertion opening is sufficient to fix the energy carriers in the receiving shaft.

The frame of the electric motorcycle according to the invention is designed as a diamond frame to achieve a low weight with high stability. A diamond frame consists of a triangle, formed by seat stay, rear strut and seat tube, and a trapezoid, which is formed by the top tube, the seat tube, the down tube and the head tube

In particular, in combination with the complementary, muscle-operated pedal auxiliary drive, the dimensions of the diamond frame according to the invention have advantages. The design of the frame of the electric motorcycle according to the invention as a diamond frame allows for the operation of the pedal auxiliary drive ergonomic dimensions with high strength, the maximum speeds of at least 89 km / h allows. Due to the integration of the energy carriers into the frame, a high energy capacity is available with low weight of the electric motorcycle.

According to a further advantageous embodiment of the electric motorcycle according to the invention, the insertion opening can penetrate the seat tube. If the frame is designed, for example, in the form of a diamond frame, an opening of the top tube accessible from the outside is available, which can be filled with energy carriers with little installation effort. Even with a fully assembled electric motorcycle such an insertion opening is easily accessible, so that defective or used energy can be easily replaced.

In order to further simplify the introduction of energy carriers into the top tube and to increase the stability of the frame, the top tube can continue on opposite sides of the seat tube. In this way, the wall of the top tube supports the edge of the insertion opening. At the same time, the extension of the top tube surrounding the insertion opening serves as a guide for energy carriers to be introduced into the receiving shaft of the top tube.

In a further advantageous embodiment, the seat tube may comprise a further receiving shaft for at least one energy carrier, which cuts the receiving shaft of the top tube and is provided at a pipe end with an insertion opening for receiving energy carriers. Such a further insertion opening has the advantage that the cavity of the seat tube can also be used as a receiving shaft for energy carriers, so that more energy sources are available without taking up additional space. The seat tube may include a seat post or saddle post receptacle on which a saddle or seat is mounted for the driver. The seat tube may be slidably received in the seat tube by the receptacle comprises, for example, a clamping element which locks the seat tube in the seat tube. The seat for the seat tube can be used at the same time as an insertion opening for filling the seat tube with energy carriers, wherein the inner diameter of the seat for the seat tube preferably corresponds to the inner diameter of the seat tube. The seat tube can be completely filled with energy before mounting the saddle tube.

The seat tube can form an extension of the receiving shaft of the seat tube. If the seat tube, for example, connected via a sleeve with the seat tube, creates an uninterrupted, common receiving shaft saddle and seat tube, which can be completely filled with energy sources. The energy sources may for example consist of accumulators, which are combined into rod-shaped packages. A predetermined number of battery packages for filling the seat tube may have a length that is greater than the length of the receiving tube formed by the seat tube. After filling the seat tube, the energy carriers thus protrude out of the seat tube. The protruding from the seat tube portion of the energy carrier is taken up by the seat tube inserted in the seat tube, serving as a receiving shaft cavity thus allowing a further increase in energy capacity.

By the frame tubes surrounding the receiving shafts, the energy sources are protected from damage from falls or shocks. In order to further improve the protection of the energy sources, the receiving wells may be lined with a damping material. In order to achieve protection of the energy carriers from moisture in addition to damping, chloroprene rubber, for example neoprene, may preferably be used for lining the receiving shafts.

According to a further advantageous embodiment, in order to save weight and material to the receiving shafts, the upper, the seat and / or the down tube may comprise a receiving shaft for at least one energy carrier, the inner contour of which through the wall of the upper, Sitting and / or the down tube is formed. In order to achieve an optimum packing density of the energy carriers within the receiving shaft, the receiving shaft of the seat tube and / or the top tube and / or the down tube and the energy carriers may have an at least approximately circular cross-section. In particular, the circular cross section or the circular contour of the energy carrier can have approximately the same diameter as the receiving shaft, so that the energy carrier fills the receiving shaft as far as possible and is fixed transversely to the respective frame tube in the mounted state.

In order to be able to assemble a control unit for controlling the motor in a simple and space-saving manner, the upper, lower or seat tube can have a sleeve opening on its lateral surface into which the control unit is repeatedly detachably inserted. The control unit may be connected with a cover to a mounting unit or to a control module which closes the shell opening.

According to an embodiment independent of the above solution, the assembly unit comprising the control unit and the cover for the shell opening may comprise further elements of the electric motorcycle which are mounted with the cover in an assembly step in the frame. For example, on the mounting unit, a power connector for charging batteries serving as energy, a overload switch or overtemperature tripping circuit breaker, a key switch unlocking the control unit, a horn, a connection for a brake line, a controller for a rear derailleur and / or the control with be provided to the control unit connecting control line.

The cover or the control module can be connected on the jacket opening with the respective frame tube in particular via reclosable connecting elements. This facilitates disassembly of the control unit for maintenance or for recycling the vehicle. The connecting elements can be designed, for example, as screws or as snap connections. In a non-positive connection of the cover with the respective frame tube, a sealing lip surrounding the jacket opening may be provided on the cover or on the frame tube. Alternatively, to facilitate a watertight closure of the lid, the lid may be glued, welded or soldered to the mouth opening. About the control unit, the power supply to the electric motor can be controlled. It can therefore occur in the control unit, a power loss, which leads to a strong heating of the control unit. In order to avoid overheating of the control unit due to the heat loss, the cover or the module comprising the control unit and the cover may have cooling surfaces which are connected to the control unit by a thermal bridge. The cooling surfaces may be arranged on the side opposite the control unit side of the lid, so that they are arranged in the mounted state of the control unit outside of the upper, the lower or the seat tube. In order to achieve optimum cooling, the cooling surfaces can be arranged in an area in which they are exposed to the airstream.

According to a further advantageous embodiment of the electric motorcycle according to the invention, the jacket opening can be designed such that through the jacket opening energy carriers in the upper, the lower or the seat tube can be used. The module comprising the control unit and the cover can preferably be arranged on the down tube, so that in addition to the upper and the seat tube, the down tube can also be filled up with energy carriers.

In order to achieve the lowest possible total weight of the electric motorcycle, the frame may be made of aluminum, wherein the upper, the lower and the seat tube have a wall thickness of at least 2 mm and / or an outer diameter of at least 64 mm. In this way, a significantly increased stability of the frame can be achieved with low weight. A frame tube having a shell opening for receiving a control module may have an enlarged outer diameter of at least 70 mm in order to increase the stability reduced by the shell opening again.

Due to the increased tube diameter of the upper, seat and / or down tube, which is significantly larger than the tube diameter conventional bicycle frame, the frame according to the invention even when designed as a diamond frame with low weight on a strength that safer driving at speeds of more than 80 km / h.

At the same time, the volume of the receiving shafts is increased by the large inner diameter of the frame tubes, so that more energy sources can be accommodated. to increase the total available power and capacity. In addition to high speeds, a large range of the electric motorcycle is possible in this way, which exceeds the usual range of the electric motor drives of bicycles with auxiliary engine significantly. The electric motorcycle according to the invention can be operated exclusively and permanently only via the electric motor drive. An additional mechanical, for example via pedals muscle-powered drive, can serve as an auxiliary drive to increase the range of the vehicle.

The electric motorcycle according to the invention is therefore due to its simple design as easy to handle and transport as a bicycle, but also offers due to the high strength of its frame and the large volume available for receiving energy carriers speeds and ranges that were previously withheld electrically powered motorcycles.

The shell opening can be closed by a cover according to a independent of the above solution an independent invention performing embodiment, which passes during operation of the electric motorcycle via support surfaces at least a portion of the force generated by external forces in the frame power flow. The support surfaces may for example be formed by an extension which projects into the shell opening and rests on the circumference of the shell opening. Furthermore, the cover can lie flat on the frame tube at the regions of the respective frame tube adjoining the jacket opening, so that an optimal pressure distribution results. Furthermore, the cover can at least partially surround the frame tube. The lid may have a continuously tapered cross-section from its center to its edge to reduce any sudden change in stiffness caused by the lid and to reduce any notch stress.

In order to reinforce the frame tube in the region of the shell opening, the shell opening may alternatively or additionally be provided with a holding frame which increases the wall thickness of the frame tube in the region of the shell opening. The frame may be provided with recesses or extensions to increase the heat-emitting surface and thus better dissipate heat loss in the control module. For the method mentioned above, the problem is solved by at least one energy carrier is introduced through an open end of the tube in an upper tube of the frame. The top tube serves equally as a receiving shaft and as a guide for the assembly of one or more energy sources. Consequently, the method according to the invention offers the advantage that no additional holder for an energy carrier has to be mounted.

The seat tube can be filled with energy carriers through an insertion opening for receiving the seat tube. The insertion opening, through which the seat tube is filled with energy sources, thus corresponds to the receptacle through which the seat tube is received. In this way, the seat tube can be filled with energy, without having to provide an additional closure for fixing the energy source.

The down tube can be filled with energy carriers by a jacket opening arranged between its ends. Filling through a jacket opening offers the advantage that the down tube can be filled with energy carriers even after a material-fit mounting of the frame.

According to a further advantageous method step, a control unit can be inserted into a shell opening of the upper, lower or seat tube and the shell opening can be closed with a lid, wherein the power flow during operation is at least partially passed through the lid.

In order to be able to increase the range of the electric motorcycle or to drive the electric motorcycle even with discharged or used energy carriers, a mechanical drive device drivable by muscle power can be provided. This may for example comprise a chain or a belt drive, which connects a pedal-driven shaft with the drive axle of the electric motorcycle. Alternatively, a propeller shaft may be provided which connects a pedal bearing driven bottom bracket with the drive axle.

In the following, the invention will be explained by way of example with reference to various embodiments with reference to the figures. In this case, the embodiments described are merely possible embodiments that can be modified for the particular application. Individual advantageous features may be used in accordance with the above Spelling the advantageous embodiments in the respectively described embodiment, added or omitted.

Show it:

Fig. 1 is a schematic representation of a first embodiment of the invention düng;

Fig. 2 is a schematic perspective view of a vehicle frame according to the invention;

Fig. 3 is a schematic bottom view of the vehicle frame of Fig. 2;

Fig. 4 is an enlarged, rotated schematic perspective view of the section IV of Fig. 2;

Fig. 5 is a schematic exploded view of the housing for the control unit shown in Fig. 4;

Fig. 6 is an enlarged schematic perspective view of the detail VI of Fig. 2;

Fig. 7 is a schematic sectional view at the point VII-VII of Fig. 6;

8 is a schematic sectional view of a further embodiment of the vehicle frame according to the invention;

9 is an enlarged sectional view of a frame tube with integrated control module.

10 is a schematic plan view of the control module of FIG. 9th

First, the structure of a vehicle according to the invention with reference to the embodiment of Figure 1 will be described. The electric motorcycle 1 has a frame 2, which is designed as a diamond frame 2 and forms a supporting structure for all other components of the electric motorcycle. In a control tube 3, a front suspension 4 is rotatably mounted, so that a rotatably connected to the front suspension 4 front wheel 5 can be deflected via a link 6. A seat tube 7 comprises at its upper end a receptacle 8 for a seat tube 9. The seat tube 9 is slidably received in the seat tube 7 and locked by a clamping member, not shown, which connects the seat tube 9 frictionally with the seat tube 7. The seat tube 9 is connected at its upper end with a saddle 10. The seat tube 7 forms with the head tube 3, a top tube 11 and a down tube 12 a base frame 13. At a node 14, on which the down tube 12 and the seat tube 7 meet, two successively arranged rear struts 15 are positively and / or cohesively attached. The two rear struts 15 each form a seat post 16 and the seat tube 7 a triangle. The two successively arranged, the seat tube 7, the rear struts 15 and the seat struts 16 comprehensive triangles form a fork-like rear suspension 17, in which a rear wheel 18 is rotatably inserted.

The rear wheel 18 is equipped in the region of its axis of rotation or its hub with an electric motor drive 19 designed as a hub motor 19, which transmits a drive torque to the rear wheel 18 via a torque support, not shown here. Alternatively or additionally, the front wheel 5 may be equipped with a hub motor 19. The hub motor 19 is powered by accumulators integrated into the base frame 13. The power of the hub motor 19 can be adjusted via an adjustment module 20 which regulates the voltage transmitted to the hub motor 19 via a control module 21 mounted on or in the down tube 12.

The base frame 13 can be completely filled with energy carriers, for example in the form of accumulators, by inserting openings 22, 23a, 24 through each tube 7, 11, 12 of the base frame 13, through which accumulators can be inserted. The insertion opening 22 arranged at an end of the upper tube 11 pointing counter to a direction of travel F is arranged at one end of a receiving shaft enclosed by the upper tube 11, which penetrates the seat tube 7, so that at least when the saddle 9 is not mounted, energy carriers pass through the insertion opening 22 the top tube 11 can be inserted. In order to simplify the introduction of energy sources into the top tube 11 and to increase the stability of the frame 2, the top tube 11 continues on opposite sides of the seat tube 7. In this way, the wall of the top tube 11 supports the edge of the insertion opening 22. At the same time, the extension of the top tube 11 surrounding the insertion opening 22 serves as a guide for the insertion opening 22 (Not shown here) receiving shaft of the top tube 11 to be introduced energy sources. The (not shown here) energy sources are received in a receiving shaft of the top tube 11, which is formed by at least a portion of the top tube 11. Alternatively or additionally, in the control tube 3, an insertion opening aligned with the receiving shaft of the top tube 11 can be provided, into which energy carriers can be inserted, at least when the front suspension 4 is not mounted.

The insertion opening 23a of the seat tube 7 serves at the same time as a receptacle 23b for the seat tube 9, in which the seat tube 9 is fastened, for example, by means of a non-positive clamping connection and / or a positive connection. The insertion opening 23a, via which the seat tube 7 is filled with energy carriers, thus corresponds to the receptacle 23b, through which the seat tube is received. Energy carriers can thus be introduced with disassembled seat tube 9 through the insertion opening 23a in the seat tube.

The insertion opening 24, which is formed by a jacket opening 24 of the down tube 12, is closed by the control module 21, which comprises a control unit and a lid. During the assembly of the electric motorcycle 1, energy carriers can be inserted through the jacket opening 24 into the down tube 12 before the control module 21 is installed.

FIG. 2 shows a further exemplary embodiment of an electric motorcycle frame according to the invention, the same reference numerals being used for elements which correspond in function and construction to the elements of the embodiment of FIG. 1. For brevity, the differences to the embodiment of FIG. 1 will be discussed.

The seat stays 16, 16 'are materially connected, for example by soldering or welding, with the top tube 11 and run in the direction of a arranged in the rear suspension 17 rear axle 25 apart. The rear struts 15, 15 'are materially connected to the seat tube 7 and the node 14 and, like the seat stays 16, 16', have a spacing which increases in the direction of the rear axle 25.

At the node 14, an inner bearing sleeve 26 is arranged, in which a pedal driven cranks driven shaft can be stored in order to drive the rear wheel via a traction mechanism, such as a belt or a chain drive. The insertion opening 22 of the upper tube 11 is formed by the tube end 30 of the upper tube 11, which is placed as an extension 30 on the seat tube 7. The insertion opening 22 is closed by a sealing closure 27, which prevents penetration of dirt or moisture into the receiving shaft of the top tube 11 or the seat tube 7. This closure can be positively inserted, for example via a thread or a snap closure, or frictionally engaged in or on the insertion opening 22.

The seat tube 7 and the top tube 11 have at a wall thickness of at least 2 mm approximately equal outside diameter of 64 mm. Both tubes 7, 11 are made of aluminum and connected to each other via welds 28, 29. Due to the equal outer diameter of the frame tubes 7, 11, the welds 28, 29 form a symmetrical cross. The tube end 30 of the top tube 11 facing away from the base frame 13 serves as a guide when inserting energy carriers into the insertion opening 22 and also provides support surfaces for the cohesive connection of the seat struts 16, 16 '. The pipe end 31 facing away from the base frame 13, however, serves for frictional and / or positive connection of the seat tube, not shown here.

The control tube 3 is preferably milled from aluminum and has compared to the frame tubes 7, 11, 12 different outer diameter. Thus, an enlarged diameter is provided at both tube ends 32, 33, which tapers in each case towards the middle section 34 of the control tube 3. The widened pipe ends 32, 33 have enlarged inner diameter, which allow the use of larger control head bearings.

The down tube 12 is materially connected to the control tube 3 and the seat tube 7 and has a wall thickness of 2 mm to an outer diameter of 70 mm. Due to the increased tube diameter of the top tube 11, seat tube 7 and / or down tube 12, the frame 2 according to the invention at low weight on a strength that allows safe driving at speeds of more than 80 km / h. Thus, the electric motorcycle 1 is also suitable for driving on roads that are intended for motor vehicles. At the same time, the volume of the receiving wells is increased by the large inner diameter of the frame tubes 7, 11, 12, so that more energy sources can be included to increase the total available power and capacity. On the down tube 12, the control module 21 is arranged. The control module 21 has a two-part housing, which comprises a support frame 35 connected to the down tube 12 and a cover 36. The preferably made of aluminum milled holding frame 35 is provided with a concave recess 37, whose contour corresponds to the lateral surface of the down tube 12. The holding frame 35 of the control module 21, which is preferably materially connected by welding to the down tube 12, can consequently be placed flat on the lateral surface of the down tube 12 during assembly, so that an accurately fitting welded joint between the holding frame 35 and down tube 12 is facilitated. During operation of the electric motorcycle 1, the holding frame 35 supports the down tube 12, since at least part of the force flow introduced into the down tube 12 by bending moments, tensile forces or compressive forces is conducted through the holding frame 35.

2. The rear struts 15, 15 'are connected to one another via a transverse strut 38, which adjoins the inner bearing sleeve 26 and is connected to it in a material-locking manner, for example by welding. The transverse strut 38 and the sections of the rear struts 15, 15 'adjoining the transverse strut 38 can in particular be produced in one piece by milling. The cross strut 38 and the adjacent to the cross member 38 portions of the rear struts 15, 15 'thus form a substantially U-shaped component, which derives stresses in the region of the inner bearing sleeve 26 during operation of the electric motorcycle and / or a concentration of power flow in the adjacent Avoid welds. By using a U-shaped, the cross member 38 comprehensive component in the adjacent to the inner bearing sleeve 26 region of the rear struts 15, 15 'can thus be achieved increased strength of the frame 2.

The cover 36 of the control module 21 has the same width as the down tube 12 and for this reason does not project beyond the down tube 12 in the lower view shown. In the event of a fall of the electric motorcycle 1, the likelihood of resting and damaging the control module 21 is reduced.

Fig. 4 shows an enlarged, rotated perspective view of the section IV of Fig. 2. The cover 36 of the control module 21 has holes 39 which are aligned with holes not shown here in the support frame 35. The bores in the holding frame 35 are provided with threads, so that the cover 36 can be connected to the holding frame 35 via screws inserted into the bores 39. The Ver- Screwing the lid 36 forms a repeatedly detachable connection of the control module 21 with the down tube 12, the maintenance of the control unit, the exchange of arranged in the down tube 12 energy sources and simplified recycling of arranged in the down tube 12 components allowed.

The lid 36 is provided with a recess 40 in which four connection openings 41, 42, 43, 44 are arranged. These connection openings 41 to 44 serve to receive a circuit breaker, a key switch, a charging power connection and a horn. Except in the region of the recess 40, the lid 36, preferably made of aluminum, has a wall thickness greater than 10 mm, which increases the heat-storing volume and the heat-emitting surface of the lid 36. The heat-emitting surface is additionally enlarged by two rib-like extensions 36a, 36b, which extend on both sides of the recess 40 in the direction of the inner bearing sleeve.

In the area of the down tube 12 covered by the holding frame 35, a recess is provided which accommodates at least a portion of the control module 21 serves. The strength and bending stiffness of the down tube 12, despite the control module 21 receiving shell opening 24 is reinforced by the cohesively attached to the down tube 12 holding frame 35.

Fig. 5 shows a schematic exploded view of the control module 21. The holding frame 35 defines the shell opening 24 of the down tube 12, which serves as an insertion opening for energy sources. The holding frame 35 is provided with ten threaded holes 45, into which screws inserted into the bores 39 of the cover 36 can be screwed, and has recesses 46 on both longitudinal sides, which extend in the direction of the longitudinal extension of the frame 35 and only in the region of Holes 45 are interrupted by sockeiförmige extensions. Also, the lid 36 is provided on both longitudinal edges with recesses 47 which extend parallel to the recesses 46 and how they are interrupted only in the area of the holes 39 through the holes 39 surrounding extensions. The recesses 46, 47 or grooves 46, 47 in the lid 36 or the holding frame 35 increase the heat-emitting surface of the control module, thereby improving the cooling of the electronics included in the control module 21. At its end pointing to the control tube 3, the cover 36 is provided with openings 48 via which control lines, brake lines and / or power supply cables for connecting the control module 21 to the control module 20 or turn signals or lamps mounted on the handlebar can be guided to the control module.

FIG. 6 shows the detail VI of FIG. 2 in an enlarged perspective exploded view. The insertion opening 22 at the pipe end 30 is closed by a closure 27. The closure 27 ensures a secure hold of the energy carrier in the top tube 11 and prevents penetration of dirt or moisture into the receiving shaft of the top tube eleventh

A shoulder 49 on the closure 27 rests on the edge of the tube end 30 when the closure 27 is inserted and thus defines the horizontal position of the closure 49. Bores 50 in the inserted into the pipe end 30 cylindrical portion 51 of the closure 27 are aligned with radial bores 52 in the pipe end 30. Radially inserted from the outside into the bores 52 connecting elements 53 are disposed in the bores 50 of the lid 27 and ensure a tight fit the cover 27 at the pipe end 30. The connecting elements 53 may, for example in the form of rivets or dowels make a frictional connection with the closure 27 and the pipe end 30 or be designed as screws to facilitate repeated opening of the shutter 27. Alternatively, the closure 27 on the shoulder 51 can be provided with an external thread which fits into a corresponding internal thread in the pipe end 30, so that the closure 27 can be screwed into the pipe end 30.

Fig. 7 shows a sectional view at the point VII-VII of Fig. 6. In a formed by the top tube 11 receiving shaft 54a, an energy source 55 is arranged, which supplies the electrical drive with electrical energy. The energy carrier 55 comprises accumulators 56, which are arranged such that the circular cross-section of the top tube 11 is optimally filled. Between the accumulators 56 connecting cable 57 are arranged, which connect the accumulators with the control module. The energy source 55 in the form of a battery pack 55 is provided with a sheath 58 which forms a circular contour with the accumulators 56 and connection cables 57 embedded in the sheath 58. Due to the circular contour of the accumulator 55, the also provided with a circular cross-section receiving shaft of the top tube 11 optimally filled.

In the seat tube 7, the down tube 12 and the top tube 11 receiving shafts 54a, 54b, 54c are provided, which are each filled with energy carriers 55, 59, so that almost the entire available void volume of from seat tube 7, down tube 12, top tube 11 and control tube 3 existing base frame 13 is filled by energy source 55. The arranged in the down tube 12 energy carrier 59 have corresponding to the larger inner diameter of the down tube 12 has a larger outer diameter. The energy carriers 59 are introduced during assembly by the closed by the control module 21 shell opening 24 in the receiving tube 54 c formed by the down tube 12. The arranged in the receiving shaft 54a of the upper tube 11 energy carrier 55 pass through the insertion opening 22 in the top tube 11. The receiving shaft 54a of the top tube 11 is continued until the tube end 30 or to the insertion opening 22, but only between the control tube 3 and seat tube 7 with Energy carriers 55 filled to fill the seat tube 7 via the pipe end 31 also with energy sources 55 can. The inserted into the seat tube 7 energy carrier 55 are inserted through the insertion opening 23 a of the pipe end 31 in the seat tube 7.

The arranged in the seat tube 7 in the region of the top tube 11 energy carrier 55 projects after filling from the insertion opening 23a of the seat tube 7. This outstanding portion of the energy carrier 55 is received at the onset of a seat tube 9, whose inner diameter is larger than the outer diameter of an energy carrier 55, through the seat tube.

All receiving shafts 54a, 54b, 54c can be equipped with an elastic, shock-absorbing inner lining, for example neoprene. In this way damage to the energy sources 55, 59 are avoided by shocks. The inner lining can be elastically deformed by the energy carriers 55, 59 in a direction extending radially to the respective tube 7, 11, 12 in order to provide a frictional grip of the energy carriers 55, 59 in the receiving wells 54a via the surface pressure between the energy carriers 55, 59 and the lining. 54b, 54c. FIG. 9 shows a further embodiment of a control module 21 'according to the invention, which is inserted into the down tube 12. In contrast to the control module 21 of FIGS. 4 and 5, the control module 21 'has no holding frame 35. A control unit 60 is attached directly to the lid 36 '. On the outer side of the cover 36 'cooling surfaces 61 designed as cooling ribs 61 are arranged, which improve the heat-emitting surface of the cover 36' and thus the cooling of the control unit 60. Via a control line 61, the control unit 60 is connected to a control module 20 attached to the steering. The lid 36 'is provided with support surfaces 63 and 64 which abut against the wall of the down tube 12 and transmit at least a portion of the guided through the down tube 12 power flow. The support surface 63 bears against the edge of a jacket opening 65, while the support surface 64 rests directly on the jacket surface. The support surface 64 has for this purpose a curvature which corresponds to the curvature of the lateral surface of the down tube 12. The cover has connection openings 43 ', 44' into which further components for connection to the control module 21 are inserted. In the connection opening 43 ', a power connection is used, to which an external power source can be connected to charge in the receiving wells 54a, 54b, 54c of the frame tubes 7, 11, 12 energy carriers 55, 59 in the form of accumulator packs 55, 59 charge to be able to.

A circuit breaker 67 inserted into the connection opening 44 interrupts the supply of power from the energy carriers if thermal overloading of the control module 21 'or overvoltage threatens. In further (not shown here) connection openings a key switch 68 and a horn 69 are also housed.

The control module 21 'is connected via connecting elements 70 positively and / or non-positively connected to the down tube 12. The connecting elements 70 may be designed as screws 70 or rivets 70. Alternatively, the control module 21 'via snap connections or the down tube 12 comprehensive clamps are positively secured.

Fig. 10 shows a bottom view of the control module 21 '. The lid 36 'is provided with four holes 39', in which connecting elements 70 are introduced. At its end facing the control tube, the cover 36 'has a connection opening 48', through which a control line passes from the control unit 60 to an operating module 20 arranged on the steering. The preferably made of aluminum lid 36 'includes a total of seven cooling fins 62, which are exposed to the wind during operation of the electric motorcycle 1 and in this way provide for improved cooling of the control module 21 '.

To prevent ingress of moisture or dirt into the receiving wells 54a, 54b, 54c, all insertion openings 22, 23, 24 and connection openings 41-44, 41 '-44', 48, 48 'of the electric motorcycle 1 are sealed watertight in the mounted state ,

In a method according to the invention for mounting the electric motorcycle, it is essential that the seat tube 7, the top tube 11 and the down tube 12 can be filled with energy carriers by reclosable openings. Maintenance of the electric motorcycle or an exchange of energy is thus significantly simplified. The down tube 12 can be closed by a repeatedly removable cover 36, 36 ', which simultaneously assumes a supporting function for reinforcing the down tube 12 and serves as a support for the control unit 60 and other components 61, 66, 67, 68, 69. The preferably slidably received seat tube 7 is filled via an insertion opening 23a with energy carriers 55, which also serves as a receptacle for a seat tube 9. For the filling of the top tube 11 with energy carriers 55, however, an insertion opening 22 is provided which penetrates the seat tube 7 and, after the introduction of energy carriers 55, is closed with a repeatedly mountable closure 27.

Within the scope of the inventive concept, deviations from the embodiments described above are possible. In order to facilitate entry into the electric motorcycle 1, the top tube 11 can be displaced in the direction of the down tube 12. According to a further advantageous embodiment of the electric motorcycle 1 according to the invention, a resilient rear suspension 17 may be provided by the rear suspension 17 is rotatably connected, for example via an arranged in the region of the node 14 axis of rotation with the base frame 13, while between the seat stays 16, 16 'and the seat tube 7 and / or top tube 11, a spring-damper assembly is arranged. A jacket opening 24, 65 with or without subframe 35 for receiving a control module 21, 21 'and / or for receiving energy sources 55, 59 may alternatively or additionally also be provided in the top tube 11 and / or the seat tube 7.

Claims

claims

1. electric motorcycle (1) with a frame (2), an electric motor drive (19) and a control unit (60) for controlling the electric motor drive (19), characterized in that the electric motorcycle (1) comprises a pedal auxiliary drive and the frame ( 2) as a diamond frame (2) with at least one top tube (11), at least one down tube (12) and at least one seat tube (7) is configured, wherein the top tube (11) comprises a receiving shaft (54a) for at least one energy carrier (55) and at least one pipe end (30) is provided with an insertion opening (22) through which the energy carrier (55) in the receiving shaft (54a) can be inserted.

2. Electric motorcycle (1) according to claim 1, characterized in that the receiving shaft (54 a) penetrates the seat tube (7).

3. electric motorcycle (1) according to claim 1 or 2, characterized in that the upper tube (11) continues on two opposite sides of the seat tube.

4. electric motorcycle (1) according to one of claims 1 to 3, characterized in that the seat tube (7) a receiving shaft (54 a) of the top tube (11) intersecting and at a pipe end (31) with an insertion opening (23 a) for receiving of energy carriers (55) provided receiving shaft (54b).

5. electric motorcycle (1) according to one of claims 1 to 4, characterized in that the seat tube (7) comprises a receptacle (23b) for a seat tube (9) and the receiving shaft (54b) of the seat tube (7) in the seat tube (9) continues.

6. electric motorcycle (1) according to one of claims 1 to 5, characterized in that the upper (11), the seat (7) and / or the down tube (12) has a receiving shaft (54 a, 54 b, 54 c) for at least an energy carrier (55, 59) which has a substantially circular shaft cross-section and in that the energy carrier (55, 59) has an at least approximately circular outer contour adapted to the shaft cross-section.

7. electric motorcycle (1) according to one of claims 1 to 6, characterized in that the down tube (12) on its lateral surface has a jacket opening (24, 65), in which the control unit (60) is inserted repeatedly releasably.

8. electric motorcycle (1) according to claim 7, characterized in that the jacket opening (24, 65) of a holding frame (35) is bounded, in the in operation of the electric motorcycle (1) resulting, through the down tube (12) extending power flow is arranged.

9. electric motorcycle (1) according to claim 8, characterized in that the jacket opening (24, 65) by a cover (36, 36 ') is closed, which via support surfaces (63, 64) in which by the upper (11) , the lower (12) and / or the seat tube (7) extending force flow is arranged.

10. Electric motorcycle (1) according to claim 9, characterized in that the cover (36, 36 ') in the assembled state has outer cooling surfaces (62) which are connected by a thermal bridge with the control unit (60).

11. Electric motorcycle (1) according to one of claims 7 to 10, characterized in that through the jacket opening (24, 65) energy carrier (55, 59) in the down tube (12) can be used.

12. Electric motorcycle (1) according to one of claims 9 to 11, characterized in that cover (36, 36 ') and control unit (60) form an integrally manageable control module (21, 21').

13. A method for assembling an electric motorcycle (1), wherein at least one energy carrier (55, 59) in a frame (2) is introduced, characterized in that at least one energy carrier (55) through an open pipe end (30) of a top tube in the top tube (11) of the frame (2) is inserted.

14. The method according to claim 13, characterized in that the seat tube (7) through a receiving opening (23) for receiving the seat tube (9) with energy carriers (55) is filled.

15. The method according to claim 13 or 14, characterized in that the upper (11), saddle (7) and / or down tube (12) by a arranged between its ends shell opening (24, 65) with Energieträgem (55, 59 ) is filled.

16. The method according to any one of claims 13 to 15, characterized in that a control unit (60) in a jacket opening (24, 65) of a frame tube (7, 11, 12) used and the shell opening (24, 65) with a lid ( 36, 36 ') is closed, wherein the power flow during operation is at least partially passed through the lid (36, 36').