EP3630593A1 - Drive unit for a bicycle - Google Patents

Drive unit for a bicycle

Info

Publication number
EP3630593A1
EP3630593A1 EP18724194.8A EP18724194A EP3630593A1 EP 3630593 A1 EP3630593 A1 EP 3630593A1 EP 18724194 A EP18724194 A EP 18724194A EP 3630593 A1 EP3630593 A1 EP 3630593A1
Authority
EP
European Patent Office
Prior art keywords
shaft
drive unit
housing
electric motor
unit according
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP18724194.8A
Other languages
German (de)
French (fr)
Inventor
Gerhard Kirschey
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Disco Drives Kirschey GmbH
Original Assignee
Disco Drives Kirschey GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Disco Drives Kirschey GmbH filed Critical Disco Drives Kirschey GmbH
Publication of EP3630593A1 publication Critical patent/EP3630593A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62M—RIDER PROPULSION OF WHEELED VEHICLES OR SLEDGES; POWERED PROPULSION OF SLEDGES OR SINGLE-TRACK CYCLES; TRANSMISSIONS SPECIALLY ADAPTED FOR SUCH VEHICLES
    • B62M6/00—Rider propulsion of wheeled vehicles with additional source of power, e.g. combustion engine or electric motor
    • B62M6/40—Rider propelled cycles with auxiliary electric motor
    • B62M6/55—Rider propelled cycles with auxiliary electric motor power-driven at crank shafts parts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62M—RIDER PROPULSION OF WHEELED VEHICLES OR SLEDGES; POWERED PROPULSION OF SLEDGES OR SINGLE-TRACK CYCLES; TRANSMISSIONS SPECIALLY ADAPTED FOR SUCH VEHICLES
    • B62M11/00—Transmissions characterised by the use of interengaging toothed wheels or frictionally-engaging wheels
    • B62M11/04—Transmissions characterised by the use of interengaging toothed wheels or frictionally-engaging wheels of changeable ratio
    • B62M11/14—Transmissions characterised by the use of interengaging toothed wheels or frictionally-engaging wheels of changeable ratio with planetary gears
    • B62M11/145—Transmissions characterised by the use of interengaging toothed wheels or frictionally-engaging wheels of changeable ratio with planetary gears built in, or adjacent to, the bottom bracket
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62M—RIDER PROPULSION OF WHEELED VEHICLES OR SLEDGES; POWERED PROPULSION OF SLEDGES OR SINGLE-TRACK CYCLES; TRANSMISSIONS SPECIALLY ADAPTED FOR SUCH VEHICLES
    • B62M11/00—Transmissions characterised by the use of interengaging toothed wheels or frictionally-engaging wheels
    • B62M11/04—Transmissions characterised by the use of interengaging toothed wheels or frictionally-engaging wheels of changeable ratio
    • B62M11/14—Transmissions characterised by the use of interengaging toothed wheels or frictionally-engaging wheels of changeable ratio with planetary gears
    • B62M11/16—Transmissions characterised by the use of interengaging toothed wheels or frictionally-engaging wheels of changeable ratio with planetary gears built in, or adjacent to, the ground-wheel hub
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62M—RIDER PROPULSION OF WHEELED VEHICLES OR SLEDGES; POWERED PROPULSION OF SLEDGES OR SINGLE-TRACK CYCLES; TRANSMISSIONS SPECIALLY ADAPTED FOR SUCH VEHICLES
    • B62M6/00—Rider propulsion of wheeled vehicles with additional source of power, e.g. combustion engine or electric motor
    • B62M6/40—Rider propelled cycles with auxiliary electric motor
    • B62M6/45—Control or actuating devices therefor
    • B62M6/50—Control or actuating devices therefor characterised by detectors or sensors, or arrangement thereof
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62M—RIDER PROPULSION OF WHEELED VEHICLES OR SLEDGES; POWERED PROPULSION OF SLEDGES OR SINGLE-TRACK CYCLES; TRANSMISSIONS SPECIALLY ADAPTED FOR SUCH VEHICLES
    • B62M6/00—Rider propulsion of wheeled vehicles with additional source of power, e.g. combustion engine or electric motor
    • B62M6/40—Rider propelled cycles with auxiliary electric motor
    • B62M6/60—Rider propelled cycles with auxiliary electric motor power-driven at axle parts
    • B62M6/65—Rider propelled cycles with auxiliary electric motor power-driven at axle parts with axle and driving shaft arranged coaxially
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/10—Structural association with clutches, brakes, gears, pulleys or mechanical starters
    • H02K7/116—Structural association with clutches, brakes, gears, pulleys or mechanical starters with gears
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K2213/00—Specific aspects, not otherwise provided for and not covered by codes H02K2201/00 - H02K2211/00
    • H02K2213/03—Machines characterised by numerical values, ranges, mathematical expressions or similar information

Definitions

  • the invention relates to a drive unit for a bicycle with a housing which forms a wet, filled with a lubricant space, with a shaft, rotatably mounted from the housing, by means of which a first torque is introduced, with a coaxially disposed in the housing around the shaft electric motor , By means of which a second torque is introduced, with a in the output member, which serves to add the first and the second torque, with an at least one stage, arranged in the housing gear, which is arranged in the power flow between the electric motor and driven member, with a between engine and Wave arranged sensor unit, which measured values of the shaft, such as torque and / or speed detected.
  • Such drive units for bicycles for electromotive assistance in locomotion are well known from the prior art.
  • the drive can be part of the front wheel or the rear wheel.
  • the drive is arranged in the region of the bottom bracket or the front chainring of the bicycle and acts by means of the front chainring drive-supporting.
  • the latter drive units are often referred to as a mid-engine, since they are arranged approximately centrally on the frame between the front wheel and the rear wheel.
  • a drive unit for an electric motor-assisted bicycle emerges from the applicant's own DE 10 2014 1 17 137 B4.
  • the embodiment here shows a so-called hub drive, in which in an enlarged diameter wheel hub an electric motor is housed together with transmission and control unit.
  • the driving force provided by the cyclist via the crank drive is combined with the driving force provided by the electric motor within the wheel hub of the rear wheel and acts on the rear wheel drive.
  • the electric motor and the likewise provided gear are arranged concentrically to the wheel axle and to the axis of rotation of the wheel or coaxially around the wheel axle.
  • a drive unit for electric motor assisted bicycles which acts on the front chainring.
  • a coaxially arranged around the pedal crankshaft around electric motor with transmission gears is provided.
  • the driving force exerted by the pedal on the front chainring and the driving force provided by the electric motor are combined within the crankshaft housing.
  • the object of the invention is to provide an improved drive unit with a compact design.
  • the invention is achieved by a drive unit with the features of claim 1, in particular with its characterizing features, according to which an additional, dry space is provided, in which electronic components, in particular the control electronics for the electric motor are arranged.
  • the invention ensures a further integration of components in the drive unit, in particular the integration of electronic components, which serves to control the electric motor and the adjustment of the output power to the respective driving situation.
  • Such high-grade integration simplifies the assembly of a solvedes because the drive unit includes all the essential components and only in a designated holder, for example, a correspondingly shaped hub or a suitably shaped bottom bracket shell must be used. The assembly personnel are not subject to high demands with regard to the handling of electronic components. Separate operations for mounting electronic components eliminated.
  • the dry space is formed concentrically around the shaft and, in particular, has an axially facing opening closable with a lid.
  • the housing forms a sleeve-like indentation arranged concentrically around the shaft, which delimits an annular space arranged between the shaft and the electric motor.
  • the sleeve-like indentation is against rotation of the shaft, so that for various sensors, such as speed sensors, a fixed reference point for a measurement is available and both rotating and stationary to be arranged sensors can be used. Particularly preferred is the application of a torque sensor in the region of the sleeve-like feeder. In addition, no separate components are needed because the sleeve-like feeder is part of the housing of the drive unit.
  • the housing is constructed in several parts by at least one radial parting plane. With these features essential to the invention, it is ensured that the housing can be assembled from individual parts that can be produced without undercut. This is particularly advantageous if at least parts of the housing are produced by casting. It is further provided that the annulus is separated axially relative to the adjacent wet space. In this way, a second, in doubt dry, so lubricant-free space can be provided, provided that the sensor units used, which are to be arranged within the annular space, require it. It is further provided that the rotor of the electric motor is arranged around the outside of the sleeve-like housing feeder.
  • a transmission input member is mounted concentrically and rotate stored on the shaft and that the rotor of the electric motor is mounted on the transmission input member and by means of this on the shaft.
  • the main advantage of this feature of the invention is the fact that the rotor requires no separate storage relative to the shaft or the sleeve-like housing catch. As a result, space is gained.
  • the transmission input member is mounted axially displaceably on the shaft.
  • the axial displaceability of the transmission input member on the shaft which may be limited by corresponding stops, guaranteed an optimal, manufacturing tolerances balancing alignment of stator and rotor of the electric motor and thus a particularly efficient operation of the electric motor.
  • the housing wall surrounding the wet space is diameter-reduced in the area of the driven member and the dry space is arranged around this diameter-reduced area.
  • the space provided for the control electronics dry space is arranged in a radial space around the shaft, so that a very compact drive unit is made possible.
  • the drive unit is arranged part of the front wheel, the rear wheel or in the bottom bracket of the bicycle.
  • Figure 1 sectional view of a drive unit according to the invention.
  • a drive unit according to the invention is provided in the figure 1 in total with the reference numeral 10.
  • the drive unit 10 initially comprises a generally designated by the reference numeral 1 1 housing, which is separated along radial parting lines R in a total of three housing parts.
  • the housing 1 1 has a central through-bore 12, through which a shaft 13 is guided, which in the present example is the pedal crankshaft of a bicycle, not shown.
  • the housing 1 1 divided along radial parting planes R initially has a first housing part 14, which forms a space 15 for an electric motor 16, whose stator 17 is fastened to an outer circumferential wall 18 of the first housing part 14.
  • the rotor 19 of the electric motor is arranged close to an inner peripheral wall 20 of the first housing part 14, which is retracted, starting from a radial wall 21 in the housing interior and sleeve-like surrounds the shaft 13.
  • the shaft 13 is supported by means of a first bearing 22 on the inner peripheral wall 20.
  • the sleeve portion 23 formed by the inner circumferential wall 20 keeps a distance from the shaft 13, so that a space 24 is formed between the sleeve portion 23 of the inner peripheral wall 20 and the shaft 13.
  • This space 24 is used according to the proposal of the invention for the arrangement of at least one sensor unit, not shown here.
  • relevant control values for the control of the electric motor 1 6 are detected. These are, for example, the torque applied to the shaft 13, the rotational speed of the shaft 13 and the like.
  • the space 24 may be separated from the rest of the housing interior by means of a radial wall, not shown here, if necessary.
  • a second housing part 25 forms a gear chamber 26, which serves to receive a gear 27 and an output member 28.
  • the gear chamber 26 passes into the engine compartment 15, so that the engine compartment 15 and the gear chamber 26 together form a housing interior.
  • This housing interior is filled with a suitable lubricant for in particular the gear 27 and is thus to be referred to as a "wet room”.
  • the transmission 27 has an input shaft 28, which is designed as a hollow shaft. This hollow shaft is via second bearing 29 on the shaft 13th held, which may be, for example, needle bearings.
  • a ring gear 31 is fixed, which forms the rotationally fixed part of the transmission 27.
  • the transmission 27 is preferably a single-stage transmission, multi-stage transmissions are not excluded.
  • the invention proposes here cycloidal or planetary gear as particularly preferred transmission variants.
  • the input shaft 28 of the transmission 27 is connected to the rotor 19, so that the rotor 19 is rotatably supported on the shaft 13 by means of the input shaft 28 and its second bearings.
  • a separate mounting of the rotor 19 with respect to the shaft 13 and the sleeve portion 23 of the inner peripheral wall 20 is thus superfluous. This ensures the possibility of creating the space between the motor 1 6 and shaft 13.
  • the transmission input shaft is axially floating at least within limits and thus axially displaceable. As a result, the rotor 19 can automatically align with the stator 17. Manufacturing and assembly tolerances can be compensated in this way.
  • the output member 33 arranged in the gear chamber 26 is formed as the output shaft 34 surrounding the shaft 13. It is supported via third bearings 35 on the shaft 13 and fifth bearing 43 on the housing 1 1.
  • the shaft 13 is rotationally coupled to the shaft 13 via a first freewheel 36 in the sense of rotation. A rotation of the shaft 13 is thus transmitted to the output sleeve 34 via the freewheel 36 in a defined direction of rotation.
  • a shaft standstill or an opposite rotation of the shaft 13 has due to the freewheel 36 on the direction of rotation of the output sleeve 34 no effect.
  • the reduction member 32 is rotationally coupled by means of a transmission output shaft 37 with the output sleeve 34 in the present embodiment, in which the transmission 27 is formed as a cycloidal gear.
  • the transmission output shaft 37 is formed as a hollow shaft.
  • the output sleeve 34 is held within the transmission output shaft 37.
  • the transmission output shaft 37 is supported via fourth bearing 38 on the output sleeve 34 and is rotation-coupled via a second freewheel 39 with the output sleeve 34 directionally defined.
  • the output sleeve 34 serves as a summing member, on which the driving forces of the motor 1 6 and the shaft 13 are brought together.
  • a chainring 40 is then outside of the housing 1 1 arranged by means of which in the usual way the summed driving force is delivered to the rear wheel of a bicycle.
  • the drive unit 10 may be designed as a rear wheel or front wheel drive for a bicycle as previously described.
  • a wheel axle would be arranged inside the shaft 13.
  • the driving forces of the shaft 13 and the motor 1 6 would in turn be brought together via the output sleeve 34.
  • a wheel hub would be set.
  • the first housing part has a radius D
  • the second housing part 25 tapers over its axial extent from a radius D to a radius d.
  • space is created to attach a third housing part 41 to the second housing part 25, which in turn has the radius D and is thus arranged concentrically around the narrowed in the radius portion of the second housing part 25 around.
  • a receiving space 42 which is delimited from the wet housing interior, consisting of engine compartment 15 and gear chamber 26.
  • This is thus a "dry space” which is not filled with gear lubricant and thus serves to arrange the control electronics for the motor 166.
  • the third housing part 41 can be made axially removable in its entirety , which can be closed with a lid opening. This makes it easy to use the control electronics and it also creates a maintenance access.
  • the invention proposes an optimized drive unit 10, which creates additional space 24 and 41 for receiving sensors and control electronics by an optimized arrangement of the engine and transmission components and an adapted shape of the housing 1.
  • the axially floating mounting of the rotor 19 also allows a manufacturing and assembly tolerances correcting, self-optimizing alignment of the rotor 19 to the stator 17 and thus an optimized engine performance.
  • Such a drive unit 10 can be created, which contains all the relevant components in a compact design and can be pre-assembled optimized handle in a bicycle manufacturing.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Power Engineering (AREA)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)

Abstract

The invention relates to a drive unit for a bicycle, comprising a housing which forms a wet space filled with a lubricant, comprising a shaft rotationally mounted by the housing, by means of which a first torque is introduced, comprising an electric motor arranged coaxially around the shaft in the housing, by means of which a second torque is introduced, comprising an output element, which is used to add the first and the second torque, comprising an at least one-stage gear mechanism arranged in the housing, which is arranged in the force flow between the electric motor and output element, comprising a sensor unit which is arranged between motor and shaft and which captures measured values of the shaft, such as torque and/or rotational speed, wherein an additional, dry space is provided, in which electronic components, in particular the control electronics for the electric motor, are arranged.

Description

Antriebseinheit für ein Fahrrad  Drive unit for a bicycle
Die Erfindung betrifft eine Antriebseinheit für ein Fahrrad mit einem Gehäuse, welches einen nassen, mit einem Schmiermittel gefüllten Raum ausbildet, mit einer Welle, rotationsgelagert vom Gehäuse, mittels derer ein erstes Drehmoment eingeleitet wird, mit einem im Gehäuse koaxial um die Welle herum angeordneten Elektromotor, mittels dessen ein zweites Drehmoment eingeleitet wird, mit einem im Abtriebsglied, welches der Addition des ersten und des zweiten Drehmomentes dient, mit einem zumindest einstufigen, im Gehäuse angeordneten Getriebe, welches im Kraftfluss zwischen Elektromotor und Abtriebsglied angeordnet ist, mit einer zwischen Motor und Welle angeordneten Sensoreinheit, welche Messwerte der Welle, wie Drehmoment und/oder Drehzahl, erfasst. Derartige Antriebseinheiten für Fahrräder zur elektromotorischen Unterstützung der Fortbewegung sind aus dem Stand der Technik hinlänglich bekannt. Sie können Teil des Vorderrades oder des Hinterrades sein. Zudem gibt es Lösungen, bei denen der Antrieb im Bereich des Tretlagers bzw. des vorderen Kettenblattes des Fahrrades angeordnet ist und vermittels des vorderen Kettenblattes antriebsunterstützend wirkt. Letztere Antriebseinheiten werden häufig auch als Mittelmotor bezeichnet, da sie am Rahmen zwischen Vorderrad und Hinterrad etwa mittig angeordnet sind. Aus der anmeldereigenen DE 10 2014 1 17 137 B4 geht beispielsweise eine Antriebseinheit für ein elektromotorisch unterstütztes Fahrrad hervor. Das Ausführungsbeispiel zeigt hier einen sogenannten Nabenantrieb, bei welchem in einer im Durchmesser vergrößerten Radnabe ein Elektromotor nebst Getriebe und Steuereinheit untergebracht wird. Bei diesem Antrieb ist vorgesehen, dass die vom Radfahrer über den Kurbelantrieb bereitgestellte Antriebskraft mit der elektromotorisch bereitgestellten Antriebskraft innerhalb der Radnabe des Hinterrades zusammengeführt wird und auf das Hinterrad antriebsfördernd wirkt. Der Elektromotor sowie das ebenfalls vorgesehene Getriebe sind konzentrisch zur Radachse und zur Drehachse des Rades bzw. koaxial um die Radachse herum angeordnet. The invention relates to a drive unit for a bicycle with a housing which forms a wet, filled with a lubricant space, with a shaft, rotatably mounted from the housing, by means of which a first torque is introduced, with a coaxially disposed in the housing around the shaft electric motor , By means of which a second torque is introduced, with a in the output member, which serves to add the first and the second torque, with an at least one stage, arranged in the housing gear, which is arranged in the power flow between the electric motor and driven member, with a between engine and Wave arranged sensor unit, which measured values of the shaft, such as torque and / or speed detected. Such drive units for bicycles for electromotive assistance in locomotion are well known from the prior art. They can be part of the front wheel or the rear wheel. In addition, there are solutions in which the drive is arranged in the region of the bottom bracket or the front chainring of the bicycle and acts by means of the front chainring drive-supporting. The latter drive units are often referred to as a mid-engine, since they are arranged approximately centrally on the frame between the front wheel and the rear wheel. For example, a drive unit for an electric motor-assisted bicycle emerges from the applicant's own DE 10 2014 1 17 137 B4. The embodiment here shows a so-called hub drive, in which in an enlarged diameter wheel hub an electric motor is housed together with transmission and control unit. In this drive, it is provided that the driving force provided by the cyclist via the crank drive is combined with the driving force provided by the electric motor within the wheel hub of the rear wheel and acts on the rear wheel drive. The electric motor and the likewise provided gear are arranged concentrically to the wheel axle and to the axis of rotation of the wheel or coaxially around the wheel axle.
Aus der DE 10 2009 014 246 A1 ist eine Antriebseinheit für elektromotorisch unterstützte Fahrräder bekannt, welche auf das vordere Kettenblatt wirkt. Auch hier ist ein koaxial um die Tretkurbelwelle herum angeordneter Elektromotor mit Übersetzungsgetrieben vorgesehen. Die von der Tretkurbel auf das vordere Kettenblatt ausgeübte Antriebskraft sowie die vom Elektromotor bereitgestellte Antriebskraft werden innerhalb des Tretkurbelwellengehäuses zusammengeführt. From DE 10 2009 014 246 A1 a drive unit for electric motor assisted bicycles is known, which acts on the front chainring. Again, a coaxially arranged around the pedal crankshaft around electric motor with transmission gears is provided. The driving force exerted by the pedal on the front chainring and the driving force provided by the electric motor are combined within the crankshaft housing.
Technisch Ähnliches ist offenbart auch die DE 10 2013 108 549 B4, wobei hier auch abweichende Ausführungsbeispiele mit alternativen Mittelmotoranordnungen gezeigt werden. Technically similar is also disclosed in DE 10 2013 108 549 B4, wherein here also deviating embodiments are shown with alternative mid-engine arrangements.
Aufgabe der Erfindung ist es, eine verbesserte Antriebseinheit mit einer kompakten Bauform zu schaffen. The object of the invention is to provide an improved drive unit with a compact design.
Gelöst wird die Erfindung durch eine Antriebseinheit mit den Merkmalen des Anspruches 1 , insbesondere mit dessen kennzeichnenden Merkmalen, wonach ein zusätzlicher, trockener Raum vorgesehen ist, in welchem elektronische Komponenten, insbesondere die Steuerelektronik für den Elektromotor angeordnet sind. The invention is achieved by a drive unit with the features of claim 1, in particular with its characterizing features, according to which an additional, dry space is provided, in which electronic components, in particular the control electronics for the electric motor are arranged.
Durch die Schaffung eines zweiten, schmiermittelfreien, trockenen Bauraumes gewährleistet die Erfindung eine weitere Integration von Bauelementen in die Antriebseinheit, hier insbesondere die Integration von elektronischen Komponenten, die zur Steuerung des Elektromotors und der Anpassung der abgegebenen Leistung auf die jeweilige Fahrsituation dient. Eine derart hochgradige Integration vereinfacht die Montage eines Fahrrades, weil die Antriebseinheit alle wesentlichen Komponenten umfasst und lediglich noch in eine dafür vorgesehene Halterung, beispielsweise eine entsprechend ausgeformte Radnabe oder ein entsprechend ausgeformtes Tretlagergehäuse eingesetzt werden muss. An das Montagepersonal werden keine hohen Anforderungen hinsichtlich des Umgangs mit Elektronikkomponenten gestellt. Separate Arbeitsgänge zur Montage von Elektronikkomponenten entfallen. By creating a second, lubricant-free, dry space, the invention ensures a further integration of components in the drive unit, in particular the integration of electronic components, which serves to control the electric motor and the adjustment of the output power to the respective driving situation. Such high-grade integration simplifies the assembly of a Fahrrades because the drive unit includes all the essential components and only in a designated holder, for example, a correspondingly shaped hub or a suitably shaped bottom bracket shell must be used. The assembly personnel are not subject to high demands with regard to the handling of electronic components. Separate operations for mounting electronic components eliminated.
Die Wartung wird erheblich vereinfacht, wenn gemäß einer bevorzugten Ausführungsform der trockene Raum konzentrisch um die Welle herum ausgebildet ist und insbesondere eine axial weisende, mit einem Deckel verschließbare Öffnung aufweist. The maintenance is greatly simplified if, according to a preferred embodiment, the dry space is formed concentrically around the shaft and, in particular, has an axially facing opening closable with a lid.
Vorgesehen ist weiterhin, dass das Gehäuse einen konzentrisch um die Welle herum angeordneten, hülsenartigen Einzug ausbildet, der einen zwischen Welle und Elektromotor angeordneten Ringraum begrenzt. It is furthermore provided that the housing forms a sleeve-like indentation arranged concentrically around the shaft, which delimits an annular space arranged between the shaft and the electric motor.
Der hülsenartige Einzug ist gegenüber der Welle drehfest, so dass für verschiedene Sensoren, beispielsweise Drehzahlsensoren, ein ortsfester Bezugspunkt für eine Messung zur Verfügung steht und sowohl rotierende wie ortsfest anzuordnende Sensoren Verwendung finden können. Besonders bevorzugt ist die Anwendung eines Drehmomentsensors im Bereich des hülsenartigen Einzugs. Darüber hinaus werden keine separaten Bauteile benötigt, da der hülsenartige Einzug Teil des Gehäuses der Antriebseinheit ist. The sleeve-like indentation is against rotation of the shaft, so that for various sensors, such as speed sensors, a fixed reference point for a measurement is available and both rotating and stationary to be arranged sensors can be used. Particularly preferred is the application of a torque sensor in the region of the sleeve-like feeder. In addition, no separate components are needed because the sleeve-like feeder is part of the housing of the drive unit.
Es ist vorgesehen, dass das Gehäuse durch zumindest eine radiale Trennebene mehrteilig aufgebaut ist. Mit diesen erfindungswesentlichen Merkmalen ist sichergestellt, dass das Gehäuse aus hinterschnittfrei herstellbaren Einzelteilen zusammensetzbar ist. Dies ist insbesondere dann von erheblichem Vorteil, wenn zumindest Teile des Gehäuses in Gießverfahren hergestellt werden. Vorgesehen ist weiter, dass der Ringraum gegenüber axial gegenüber dem sich anschließenden nassen Raum getrennt ist. Auf diese Weise kann ein zweiter, im Zweifel trockener, also schmiermittelfreier Raum bereitgestellt werden, sofern die verwendeten Sensoreinheiten, welche innerhalb des Ringraumes anzuordnen sind, dies erfordern. Vorgesehen ist ferner, dass der Rotor des Elektromotors außenumfänglich um den hülsenartigen Gehäuseeinzug herum angeordnet ist. Umgekehrt bedeutet dies, dass der Ringraum für die Sensorik innerhalb einer Ausnehmung des Rotors des Elektromotors angeordnet ist und somit eine bauraumoptimierte Anordnung der Sensoreinheiten bzw. des dafür vorgesehenen Raumes ermöglicht ist. Die axial notwendige Länge der Antriebseinheit wird so reduziert. It is envisaged that the housing is constructed in several parts by at least one radial parting plane. With these features essential to the invention, it is ensured that the housing can be assembled from individual parts that can be produced without undercut. This is particularly advantageous if at least parts of the housing are produced by casting. It is further provided that the annulus is separated axially relative to the adjacent wet space. In this way, a second, in doubt dry, so lubricant-free space can be provided, provided that the sensor units used, which are to be arranged within the annular space, require it. It is further provided that the rotor of the electric motor is arranged around the outside of the sleeve-like housing feeder. Conversely, this means that the annulus for the sensor is disposed within a recess of the rotor of the electric motor and thus a space-optimized arrangement of the sensor units and the space provided for this purpose is possible. The axially necessary length of the drive unit is thus reduced.
Ferner ist vorgesehen, dass ein Getriebeeingangsglied konzentrisch und rotieren gelagert auf der Welle angeordnet ist und dass der Rotor des Elektromotors am Getriebeeingangsglied und vermittels dieses auf der Welle gelagert ist. It is further provided that a transmission input member is mounted concentrically and rotate stored on the shaft and that the rotor of the electric motor is mounted on the transmission input member and by means of this on the shaft.
Der wesentliche Vorteil dieses Erfindungsmerkmales ist darin zu sehen, dass der Rotor keine separate Lagerung gegenüber der Welle bzw. des hülsenartigen Gehäuseeinzugs erfordert. Hierdurch wird Bauraum gewonnen. The main advantage of this feature of the invention is the fact that the rotor requires no separate storage relative to the shaft or the sleeve-like housing catch. As a result, space is gained.
Vorgesehen ist ferner, dass das Getriebeeingangsglied axial verschieblich auf der Welle gelagert ist. It is further provided that the transmission input member is mounted axially displaceably on the shaft.
Die axiale Verschiebbarkeit des Getriebeeingangsgliedes auf der Welle, welche durch entsprechende Anschläge begrenzt sein kann, gewährleistet eine optimale, Fertigungstoleranzen ausgleichende Ausrichtung von Stator und Rotor des Elektromotors und somit einen besonders effizienten Betrieb des Elektromotors. Von besonderem Vorteil ist eine Ausführungsform, die sich dadurch kennzeichnet, dass die den nassen Raum umgebende Gehäusewandung im Bereich des Abtriebsgliedes durchmesserverjüngt ist und der trockene Raum um diesen durchmesserverjüngten Bereich herum angeordnet ist. Gemäß dieser vorteilhaften Ausführungsform wird der für die Steuerelektronik vorgesehene trockene Raum in einem Radialraum um die Welle herum angeordnet, so dass eine ausgesprochen kompakte Antriebseinheit ermöglicht ist. Schließlich ist vorgesehen, dass die Antriebseinheit Teil der Vorderrades, des Hinterrades oder im Tretlagergehäuse des Fahrrades angeordnet ist. The axial displaceability of the transmission input member on the shaft, which may be limited by corresponding stops, guaranteed an optimal, manufacturing tolerances balancing alignment of stator and rotor of the electric motor and thus a particularly efficient operation of the electric motor. Of particular advantage is an embodiment which is characterized in that the housing wall surrounding the wet space is diameter-reduced in the area of the driven member and the dry space is arranged around this diameter-reduced area. According to this advantageous embodiment, the space provided for the control electronics dry space is arranged in a radial space around the shaft, so that a very compact drive unit is made possible. Finally, it is provided that the drive unit is arranged part of the front wheel, the rear wheel or in the bottom bracket of the bicycle.
Weitere Vorteile der Erfindung sowie ein besseres Verständnis derselben gibt die nachfolgende Beschreibung eines Ausführungsbeispiels: Further advantages of the invention and a better understanding of the same are the following description of an embodiment:
Figur 1 Schnittdarstellung einer erfindungsgemäßen Antriebseinheit. Figure 1 sectional view of a drive unit according to the invention.
Eine erfindungsgemäße Antriebseinheit ist in der Figur 1 insgesamt mit der Bezugsziffer 10 versehen. A drive unit according to the invention is provided in the figure 1 in total with the reference numeral 10.
Die Antriebseinheit 10 umfasst zunächst ein insgesamt mit der Bezugsziffer 1 1 bezeichnetes Gehäuse, welches entlang radialer Trennebenen R in insgesamt drei Gehäuseteile getrennt ist. Das Gehäuse 1 1 verfügt über eine zentrale Durchgangsbohrung 12, durch welche eine Welle 13 geführt ist, bei welcher es sich im vorliegenden Beispiel um die Tretkurbelwelle eines nicht dargestellten Fahrrades handelt. Das entlang radialer Trennebenen R geteilte Gehäuse 1 1 verfügt zunächst über ein erstes Gehäuseteil 14, welches einen Raum 15 für einen Elektromotor 16 ausbildet, dessen Stator 17 an einer Außenumfangswand 18 des ersten Gehäuseteiles 14 befestigt ist. Der Rotor 19 des Elektromotors ist nahe einer Innenumfangswand 20 des ersten Gehäuseteils 14 angeordnet, welche, ausgehend von einer Radialwand 21 in den Gehäuseinnenraum eingezogen ist und hülsenartig die Welle 13 umgibt. Die Welle 13 ist mittels eines ersten Lagers 22 an der Innenumfangswand 20 abgestützt. Der durch die Innenumfangswand 20 gebildete Hülsenabschnitt 23 hält gegenüber der Welle 13 einen Abstand, so dass zwischen Hülsenabschnitt 23 der Innenumfangswand 20 und der Welle 13 ein Bauraum 24 entsteht. Dieser Bauraum 24 wird gemäß Vorschlag der Erfindung zur Anordnung wenigstens einer hier nicht dargestellten Sensoreinheit genutzt. Mittels solcher Sensoreinheiten werden relevante Steuerwerte für die Steuerung des Elektromotors 1 6 erfasst. Hierbei handelt es sich beispielsweise um das an der Welle 13 anliegende Drehmoment, die Drehzahl der Welle 13 und ähnliches. Der Bauraum 24 kann gegenüber dem übrigen Gehäuseinnenraum mittels einer hier nicht dargestellten Radialwand abgetrennt sein, sofern dies erforderlich ist. The drive unit 10 initially comprises a generally designated by the reference numeral 1 1 housing, which is separated along radial parting lines R in a total of three housing parts. The housing 1 1 has a central through-bore 12, through which a shaft 13 is guided, which in the present example is the pedal crankshaft of a bicycle, not shown. The housing 1 1 divided along radial parting planes R initially has a first housing part 14, which forms a space 15 for an electric motor 16, whose stator 17 is fastened to an outer circumferential wall 18 of the first housing part 14. The rotor 19 of the electric motor is arranged close to an inner peripheral wall 20 of the first housing part 14, which is retracted, starting from a radial wall 21 in the housing interior and sleeve-like surrounds the shaft 13. The shaft 13 is supported by means of a first bearing 22 on the inner peripheral wall 20. The sleeve portion 23 formed by the inner circumferential wall 20 keeps a distance from the shaft 13, so that a space 24 is formed between the sleeve portion 23 of the inner peripheral wall 20 and the shaft 13. This space 24 is used according to the proposal of the invention for the arrangement of at least one sensor unit, not shown here. By means of such sensor units relevant control values for the control of the electric motor 1 6 are detected. These are, for example, the torque applied to the shaft 13, the rotational speed of the shaft 13 and the like. The space 24 may be separated from the rest of the housing interior by means of a radial wall, not shown here, if necessary.
Ein zweites Gehäuseteil 25 bildet einen Getrieberaum 26 aus, der der Aufnahme eines Getriebes 27 sowie eines Abtriebgliedes 28 dient. Der Getrieberaum 26 geht dabei in den Motorraum 15 über, so dass der Motorraum 15 und der Getrieberaum 26 gemeinsam einen Gehäuseinnenraum bilden. Dieser Gehäuseinnenraum ist mit einem geeigneten Schmiermittel für insbesondere das Getriebe 27 gefüllt und ist somit als„nasser Raum" zu bezeichnen. A second housing part 25 forms a gear chamber 26, which serves to receive a gear 27 and an output member 28. The gear chamber 26 passes into the engine compartment 15, so that the engine compartment 15 and the gear chamber 26 together form a housing interior. This housing interior is filled with a suitable lubricant for in particular the gear 27 and is thus to be referred to as a "wet room".
Das Getriebe 27 verfügt über eine Eingangswelle 28, welche als Hohlwelle ausgebildet ist. Diese Hohlwelle ist über zweite Lager 29 auf der Welle 13 gehalten, wobei es sich hierbei beispielsweise um Nadellager handeln kann. An der Außenwand 30 des zweiten Gehäuseteils 25 ist ein Hohlrad 31 festgelegt, welches den rotationsfesten Teil des Getriebes 27 bildet. Zwischen der Eingangswelle 28 und dem Hohlrad 31 ist zu mindestens ein Übersetzungslied 32 angeordnet, mit Hilfe dessen die Drehzahl und das Drehmoment des Elektromotors 1 6 in geeigneter Weise gewandelt wird. Bei dem Getriebe 27 handelt es sich vorzugsweise um ein einstufiges Getriebe, wobei mehrstufige Getriebe nicht ausgeschlossen sind. Die Erfindung schlägt hier Zykloidgetriebe oder Planetengetriebe als besonders bevorzugte Getriebevarianten vor. The transmission 27 has an input shaft 28, which is designed as a hollow shaft. This hollow shaft is via second bearing 29 on the shaft 13th held, which may be, for example, needle bearings. On the outer wall 30 of the second housing part 25, a ring gear 31 is fixed, which forms the rotationally fixed part of the transmission 27. Between the input shaft 28 and the ring gear 31 is arranged at least one translation member 32, by means of which the rotational speed and the torque of the electric motor 1 6 is converted in a suitable manner. The transmission 27 is preferably a single-stage transmission, multi-stage transmissions are not excluded. The invention proposes here cycloidal or planetary gear as particularly preferred transmission variants.
Besondere Beachtung ist der Eingangswelle 28 des Getriebes 27 zu schenken. Diese ist mit dem Rotor 19 verbunden, so dass der Rotor 19 vermittels der Eingangswelle 28 und deren zweiten Lagern rotativ auf der Welle 13 gehalten ist. Eine separate Lagerung des Rotors 19 gegenüber der Welle 13 bzw. dem Hülsenabschnitt 23 der Innenumfangswand 20 ist somit überflüssig. Dies gewährleistet die Möglichkeit, den Bauraum 24 zwischen Motor 1 6 und Welle 13 zu schaffen. Die Getriebeeingangswelle ist zumindest in Grenzen axial schwimmend gelagert und somit axial verschieblich. Hierdurch kann sich der Rotor 19 selbsttätig zum Stator 17 ausrichten. Fertigungs- und Montagetoleranzen lassen sich auf diese Weise kompensieren. Particular attention should be paid to the input shaft 28 of the transmission 27. This is connected to the rotor 19, so that the rotor 19 is rotatably supported on the shaft 13 by means of the input shaft 28 and its second bearings. A separate mounting of the rotor 19 with respect to the shaft 13 and the sleeve portion 23 of the inner peripheral wall 20 is thus superfluous. This ensures the possibility of creating the space between the motor 1 6 and shaft 13. The transmission input shaft is axially floating at least within limits and thus axially displaceable. As a result, the rotor 19 can automatically align with the stator 17. Manufacturing and assembly tolerances can be compensated in this way.
Das im Getrieberaum 26 angeordnete Abtriebsglied 33 ist als die Welle 13 umgebende Abtriebshülse 34 gebildet. Sie wird über dritte Lager 35 auf der Welle 13 und über fünfte Lager 43 am Gehäuse 1 1 abgestützt. Die Welle 13 ist über einen ersten Freilauf 36 drehrichtungsdefiniert mit der Welle 13 rotationsgekoppelt. Eine Rotation der Welle 13 wird somit über den Freilauf 36 in einer definierten Rotationsrichtung auf die Abtriebshülse 34 übertragen. Ein Wellenstillstand oder eine gegensinnige Drehung der Welle 13 hat aufgrund des Freilaufes 36 auf die Rotationsrichtung der Abtriebshülse 34 keinen Einfluss. Das Untersetzungsglied 32 ist im vorliegenden Ausführungsbeispiel, bei welchem das Getriebe 27 als Zykloidgetriebe ausgebildet ist, mittels einer Getriebeausgangswelle 37 mit der Abtriebshülse 34 rotationsgekoppelt. Dabei ist auch die Getriebeausgangswelle 37 als Hohlwelle ausgebildet. Die Abtriebshülse 34 ist innerhalb der Getriebeausgangswelle 37 gehalten. Die Getriebeausgangswelle 37 stützt sich über vierte Lager 38 an der der Abtriebshülse 34 ab und ist über einen zweiten Freilauf 39 mit der Abtriebshülse 34 richtungsdefiniert rotationsgekoppelt. Auf diese Weise dient die Abtriebshülse 34 gleichsam als Summierglied, an welcher die Antriebskräfte des Motors 1 6 und der Welle 13 zusammengeführt werden. The output member 33 arranged in the gear chamber 26 is formed as the output shaft 34 surrounding the shaft 13. It is supported via third bearings 35 on the shaft 13 and fifth bearing 43 on the housing 1 1. The shaft 13 is rotationally coupled to the shaft 13 via a first freewheel 36 in the sense of rotation. A rotation of the shaft 13 is thus transmitted to the output sleeve 34 via the freewheel 36 in a defined direction of rotation. A shaft standstill or an opposite rotation of the shaft 13 has due to the freewheel 36 on the direction of rotation of the output sleeve 34 no effect. The reduction member 32 is rotationally coupled by means of a transmission output shaft 37 with the output sleeve 34 in the present embodiment, in which the transmission 27 is formed as a cycloidal gear. In this case, the transmission output shaft 37 is formed as a hollow shaft. The output sleeve 34 is held within the transmission output shaft 37. The transmission output shaft 37 is supported via fourth bearing 38 on the output sleeve 34 and is rotation-coupled via a second freewheel 39 with the output sleeve 34 directionally defined. In this way, the output sleeve 34 serves as a summing member, on which the driving forces of the motor 1 6 and the shaft 13 are brought together.
Auf der Abtriebshülse 34 ist sodann außerhalb des Gehäuses 1 1 ein Kettenblatt 40 angeordnet, mittels dessen in gewohnter Weise die summierte Antriebskraft auf das Hinterrad eines Fahrrades abgegeben wird. On the output sleeve 34 a chainring 40 is then outside of the housing 1 1 arranged by means of which in the usual way the summed driving force is delivered to the rear wheel of a bicycle.
Ohne weiteres kann die Antriebseinheit 10 gemäß vorhergehender Beschreibung auch als Hinterrad- bzw. Vorderradantrieb für ein Fahrrad konzipiert werden. In diesem Fall wäre eine Radachse innerhalb der Welle 13 anzuordnen. Die Antriebskräfte der Welle 13 und des Motors 1 6 würden wiederum über die Abtriebshülse 34 zusammengeführt. Anstelle des Kettenblattes 40 würde eine Radnabe anzusetzen sein. Without further ado, the drive unit 10 may be designed as a rear wheel or front wheel drive for a bicycle as previously described. In this case, a wheel axle would be arranged inside the shaft 13. The driving forces of the shaft 13 and the motor 1 6 would in turn be brought together via the output sleeve 34. Instead of the chainring 40, a wheel hub would be set.
Wie der Figur 1 zu entnehmen ist, verfügt das erste Gehäuseteil über einen Radius D, wohingegen das zweite Gehäuseteil 25 sich über seine Axialerstreckung von einem Radius D auf einen Radius d verjüngt. Hierdurch wird Platz geschaffen, um ein drittes Gehäuseteil 41 an das zweite Gehäuseteil 25 anzusetzen, welches wiederum den Radius D aufweist und somit konzentrisch um den im Radius verengten Abschnitt des zweiten Gehäuseteils 25 herum angeordnet ist. Zwischen dem dritten Gehäuseteil 41 und dem zweiten Gehäuseteil 25 wird so im verjüngten Bereich ein Aufnahmeraum 42 geschaffen, der gegenüber dem nassen Gehäuseinnenraum, bestehend aus Motorraum 15 und Getrieberaum 26 abgegrenzt ist. Es handelt sich hierbei somit um einen„trockenen Raum" der nicht mit Getriebeschmiermittel gefüllt ist und so zur Anordnung der Steuerelektronik für den Motor 1 6 dient. Das dritte Gehäuseteil 41 kann in Gänze axial demontierbar ausgestaltet sein. Alternativ kann das dritte Gehäuseteil 41 eine axialweisende, mit einem Deckel verschließbare Öffnung aufweisen. Hierdurch lässt sich auf einfache Weise die Steuerelektronik einsetzen und es wird zudem ein Wartungszugang geschaffen. As can be seen from FIG. 1, the first housing part has a radius D, whereas the second housing part 25 tapers over its axial extent from a radius D to a radius d. As a result, space is created to attach a third housing part 41 to the second housing part 25, which in turn has the radius D and is thus arranged concentrically around the narrowed in the radius portion of the second housing part 25 around. Between the third Housing part 41 and the second housing part 25 is thus created in the tapered region a receiving space 42 which is delimited from the wet housing interior, consisting of engine compartment 15 and gear chamber 26. This is thus a "dry space" which is not filled with gear lubricant and thus serves to arrange the control electronics for the motor 166. The third housing part 41 can be made axially removable in its entirety , which can be closed with a lid opening. This makes it easy to use the control electronics and it also creates a maintenance access.
Insgesamt schlägt die Erfindung eine optimierte Antriebseinheit 10 vor, welche durch eine optimierte Anordnung der Motor- und Getriebebauteile sowie eine angepasste Ausformung des Gehäuses 1 1 zusätzliche Räume 24 und 41 zur Aufnahme von Sensoren und Steuerungselektronik schafft. Die axial schwimmende Lagerung des Rotors 19 erlaubt zudem eine Fertigungs- und Montagetoleranzen korrigierende, sich selbst optimierende Ausrichtung des Rotors 19 zum Stator 17 und somit eine optimierte Motorleistung. Overall, the invention proposes an optimized drive unit 10, which creates additional space 24 and 41 for receiving sensors and control electronics by an optimized arrangement of the engine and transmission components and an adapted shape of the housing 1. The axially floating mounting of the rotor 19 also allows a manufacturing and assembly tolerances correcting, self-optimizing alignment of the rotor 19 to the stator 17 and thus an optimized engine performance.
Insgesamt kann so eine Antriebseinheit 10 geschaffen werden, welche bei einer kompakten Bauform alle relevanten Bauteile enthält und sich vormontiert optimiert in einer Fahrradfertigung handhaben lässt. Overall, such a drive unit 10 can be created, which contains all the relevant components in a compact design and can be pre-assembled optimized handle in a bicycle manufacturing.
Bezugszeichenliste LIST OF REFERENCE NUMBERS
10 Antriebseinheit 10 drive unit
11 Gehäuse  11 housing
12 Durchgangsbohrung 12 through hole
13 Welle 13 wave
14 erstes Gehäuseteil 14 first housing part
15 Motorraum 15 engine compartment
16 Elektromotor  16 electric motor
17 Stator  17 stator
18 Außenumfangswand 18 outer peripheral wall
19 Rotor 19 rotor
20 Innenumfangswand 20 inner peripheral wall
21 Radialwand 21 radial wall
22 erstes Lager  22 first camp
23 Hülsenabschnitt 23 sleeve section
24 Bau räum 24 construction space
25 zweites Gehäuseteil 25 second housing part
26 Getrieberaum 26 gear compartment
27 Getriebe  27 gears
28 Getriebeeingangswelle 28 transmission input shaft
29 zweites Lager 29 second camp
30 Außenwand  30 outer wall
31 Hohlrad  31 ring gear
32 Untersetzungsglied 32 reduction element
33 Abtriebsglied 33 output member
34 Abtriebshülse  34 output sleeve
35 drittes Lager  35 third camp
36 erster Freilauf  36 first freewheel
37 Getriebeausgangswelle 37 transmission output shaft
38 viertes Lager 38 fourth camp
39 zweiter Freilauf 40 Kettenblatt 39 second freewheel 40 chainring
41 drittes Gehäuseteil 41 third housing part
42 Aufnahmeraum42 recording room
43 fünftes Lager 43 fifth camp
R radiale TrennebeneR radial parting plane
D Radius D radius
d Radius d radius

Claims

A n s p r ü c h e: Claims:
1 . Antriebseinheit (10) für ein Fahrrad 1 . Drive unit (10) for a bicycle
mit einem Gehäuse (1 1 ), welches einen nassen, mit einem Schmiermittel gefüllten Raum (26/15) ausbildet,  with a housing (11) which forms a wet space (26/15) filled with a lubricant,
mit einer Welle (13), rotationsgelagert vom Gehäuse (1 1 ), mittels derer ein erstes Drehmoment eingeleitet wird,  with a shaft (13), rotatably mounted from the housing (1 1), by means of which a first torque is introduced,
mit einem im Gehäuse koaxial um die Welle (13) herum angeordneten Elektromotor (1 6), mittels dessen ein zweites Drehmoment eingeleitet wird,  with a coaxially in the housing around the shaft (13) arranged around the electric motor (1 6), by means of which a second torque is introduced,
mit einem im Abtriebsglied (33/34), welches der Addition des ersten und des zweiten Drehmomentes dient,  with a in the output member (33/34), which serves to add the first and the second torque,
mit einem zumindest einstufigen, im Gehäuse (1 1 ) angeordneten Getriebe (27), welches im Kraftfluss zwischen Elektromotor (1 6) und Abtriebsglied (33/34) angeordnet ist,  with an at least one-stage, in the housing (1 1) arranged gear (27), which is arranged in the power flow between the electric motor (1 6) and output member (33/34),
mit einer zwischen Motor (1 6) und Welle (13) angeordneten Sensoreinheit, welche Messwerte der Welle (13), wie Drehmoment und/oder Drehzahl, erfasst,  with a sensor unit arranged between motor (1 6) and shaft (13), which detects measured values of the shaft (13), such as torque and / or rotational speed,
dadurch gekennzeichnet, dass characterized in that
- ein zusätzlicher, trockener Raum (42) vorgesehen ist, in welchem elektronische Komponenten, insbesondere die Steuerelektronik für den Elektromotor (1 6) angeordnet sind. - An additional, dry space (42) is provided, in which electronic components, in particular the control electronics for the electric motor (1 6) are arranged.
2. Antriebseinheit nach Anspruch 1 , dadurch gekennzeichnet, dass der trockene Raum (42) konzentrisch um die Welle (13) herum ausgebildet ist und insbesondere eine axial weisende, mit einem Deckel verschließbare Öffnung aufweist. 2. Drive unit according to claim 1, characterized in that the dry space (42) concentrically around the shaft (13) is formed around and in particular has an axially facing, closable with a lid opening.
3. Antriebseinheit nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass das Gehäuse (1 1 ) einen konzentrisch um die Welle (13) herum angeordneten, hülsenartigen Einzug (20/23) ausbildet, der einen zwischen Welle und Elektromotor (1 6) angeordneten Ringraum (24) begrenzt. 3. Drive unit according to claim 1 or 2, characterized in that the housing (1 1) concentrically around the shaft (13) arranged around, sleeve-like retraction (20/23) is formed, which arranged between a shaft and electric motor (1 6) Annular space (24) limited.
4. Antriebseinheit nach Anspruch 3, dadurch gekennzeichnet, dass der Ringraum (24) der Aufnahme der Sensoreinheit dient. 4. Drive unit according to claim 3, characterized in that the annular space (24) serves to receive the sensor unit.
5. Antriebseinheit nach Anspruch 4, dadurch gekennzeichnet, dass der Ringraum (24) gegenüber axial dem sich anschließenden nassen Raum (15/26) getrennt ist. 5. Drive unit according to claim 4, characterized in that the annular space (24) opposite to the axially adjacent wet space (15/26) is separated.
6. Antriebseinheit nach Anspruch 3, dadurch gekennzeichnet, dass der Rotor (19) des Elektromotors (1 6) außenumfänglich um den hülsenartigen Gehäuseeinzug (23) angeordnet ist. 6. Drive unit according to claim 3, characterized in that the rotor (19) of the electric motor (1 6) is arranged externally around the sleeve-like housing pull-in (23).
7. Antriebseinheit nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass ein Getriebeeingangsglied (28) konzentrisch und rotieren gelagert auf der Welle (13) angeordnet ist und dass der Rotor (19) des Elektromotors (1 6) am Getriebeeingangsglied (28) und vermittels dessen auf der Welle (13) gelagert ist. 7. Drive unit according to one of the preceding claims, characterized in that a transmission input member (28) mounted concentrically and rotate on the shaft (13) and that the rotor (19) of the electric motor (1 6) on the transmission input member (28) and mediate which is mounted on the shaft (13).
8. Antriebseinheit nach Anspruch 7, dadurch gekennzeichnet, dass das Getriebeeingangsglied (28) axial verschieblich auf der Welle (13) gelagert ist. 8. Drive unit according to claim 7, characterized in that the transmission input member (28) is mounted axially displaceably on the shaft (13).
9. Antriebseinheit nach Anspruch 1 , dadurch gekennzeichnet, dass das die den nassen Raum (15/26) umgebende Gehäusewandung im Bereich des Abtriebsgliedes (33/34) durchmesserverjüngt ist und der trockene Raum (42) um diesen durchmesserverjüngten Bereich herum angeordnet ist. 9. Drive unit according to claim 1, characterized in that the housing surrounding the wet space (15/26) in the region of the driven member (33/34) is diameter-reduced and the dry space (42) is arranged around this diameter-tapered area around.
10. Antriebseinheit nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass das Gehäuse (1 1 ) durch zumindest eine radiale Trennebene (R) mehrteilig aufgebaut ist. 10. Drive unit according to one of the preceding claims, characterized in that the housing (1 1) by at least one radial parting plane (R) is constructed in several parts.
1 1 . Antriebseinheit nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Antriebseinheit (10) Teil der Vorderrades, des Hinterrades oder im Tretlagergehäuse des Fahrrades angeordnet ist. 1 1. Drive unit according to one of the preceding claims, characterized in that the drive unit (10) is arranged part of the front wheel, the rear wheel or in the bottom bracket of the bicycle.
EP18724194.8A 2017-05-30 2018-05-08 Drive unit for a bicycle Withdrawn EP3630593A1 (en)

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DE102017111770.9A DE102017111770A1 (en) 2017-05-30 2017-05-30 Drive unit for a bicycle
PCT/EP2018/061763 WO2018219597A1 (en) 2017-05-30 2018-05-08 Drive unit for a bicycle

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DE102014117137B4 (en) 2014-11-24 2017-01-05 Gerhard Kirschey Stepless bicycle transmission

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DE102017111770A1 (en) 2018-12-06
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