WO2023281249A1 - Bicyclettes à pédales à assistance électrique - Google Patents

Bicyclettes à pédales à assistance électrique Download PDF

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Publication number
WO2023281249A1
WO2023281249A1 PCT/GB2022/051719 GB2022051719W WO2023281249A1 WO 2023281249 A1 WO2023281249 A1 WO 2023281249A1 GB 2022051719 W GB2022051719 W GB 2022051719W WO 2023281249 A1 WO2023281249 A1 WO 2023281249A1
Authority
WO
WIPO (PCT)
Prior art keywords
drive
annulus
cycle
planet carrier
pedal
Prior art date
Application number
PCT/GB2022/051719
Other languages
English (en)
Inventor
Riccardo Meldolesi
Original Assignee
Ebike Systems Ltd
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 Ebike Systems Ltd filed Critical Ebike Systems Ltd
Publication of WO2023281249A1 publication Critical patent/WO2023281249A1/fr

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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
    • B62M6/60—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
    • 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
    • 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
    • B62M11/18—Transmissions characterised by the use of interengaging toothed wheels or frictionally-engaging wheels of changeable ratio with planetary gears with a plurality of planetary gear units

Definitions

  • the present invention relates to electrically-assisted pedal cycles.
  • pedal cycle There are various forms of pedal cycle.
  • One conventional form of pedal cycle is that which is only ever driven by a cyclist applying force to the pedals, such cycles sometimes being referred to as “push bikes”.
  • Another more recent form of pedal cycle is the electrically-assisted pedal cycle, commonly now known as an “e-Bike", in which electrical power is used to assist or replace the efforts of the rider.
  • e-Bike electrically-assisted pedal cycle
  • Both conventional pedal cycles and e-Bikes may have two, three or four wheels, and, in some, cases even more.
  • the term "pedal cycle” is used to include both conventional pedal cycles and e- Bikes.
  • e-Bikes include means for storing electrical energy, such as batteries, and an electric motor arranged to propel, either in combination with pedal input, or to replace pedal input.
  • the batteries can be recharged by plugging them into a supply of electrical energy, such as an outlet from a mains supply; in some cases, also by recovering energy from motion of the cycle by way of regenerative braking, and in others by generation of electricity in a series hybrid configuration.
  • the principle of regenerative braking will be familiar to those skilled in this field of technology.
  • e-Bikes may be placed generally into one of two groups.
  • the first group is that in which the cycle can provide electrical assistance on demand, at any time, regardless of whether or not the cyclist is pedalling. Cycles in this group can be thought of as being generally equivalent to electric mopeds.
  • the pedal input may be rarely used or only as a "limp home" capability when the battery is discharged. Cycles in the second group only provide electrical assistance when the cyclist is pedalling. These are referred to as "pedelecs".
  • Preferred embodiments of the present invention aim to provide pedelecs and drive systems for them, in which an electrical power boost may be provided in a predictable and repeatable manner, in order to afford a ride that feels as natural as possible to a rider.
  • Embodiments of the invention may be particularly effective in the use of a 3-branch power combining epicyclic transmission (two inputs and one output) in a CVT transmission.
  • Preferred embodiments of the present invention aim to provide electrically-assisted pedal cycles and drive systems for them, in which the drive systems are relatively light and compact.
  • a drive system for an electrically-assisted pedal cycle comprising: an input that, in use, receives drive from a pedal of the cycle and rotates about an axis; an output that, in use, rotates about said axis to provide drive to a driven wheel of the cycle; an electrical machine that, in use, provides motor drive to said output; and a drive train that, in use, receives drive from the electrical machine and the pedal and transmits drive to said output:
  • the drive train comprises an epicyclic gear set having a sun gear, a planet carrier, a plurality of planet gears and an annulus gear, the planet gears being mounted on the planet carrier and meshing with both the sun gear and the annulus gear, and the annulus gear being connected to said output to rotate, in use, with said output: the epicyclic gear set, in use, transmits drive from a pedal to its annulus via its planet carrier: the sun gear is connected to be driven by the electrical machine: and the drive
  • the drive train further comprises a one-way clutch between the planet carrier and annulus of the epicyclic gear set, to prevent the planet carrier from rotating faster than the annulus in the direction that causes the cycle to travel forward.
  • Each planet gear may be of compound configuration, having a smaller gear and a larger gear that are rotationally solid with one another, one of the smaller and larger gears meshing with the annulus and the other of the smaller and larger gears meshing with the sun.
  • the epicyclic gear set is a dual gear set comprising a first set of first sun, planets, planet carrier and annulus; and a second set of second sun, planets, planet carrier and annulus; the second sun being rotationally solid with the first planet carrier; the second planet carrier receiving drive from a pedal, in use; the first sun receiving drive from the electric motor, in use; and both the first annulus and the second annulus rotating, in use, with said output.
  • the first annulus and second annulus may be formed as a common annulus.
  • the invention provides a drive system for an electrically-assisted pedal cycle, the system comprising: an input that, in use, receives drive from a pedal of the cycle and rotates about an axis; an output that, in use, rotates about said axis to provide drive to a driven wheel of the cycle; an electrical machine that, in use, provides motor drive to said output; and a drive train that, in use, receives drive from the electrical machine and the pedal and transmits drive to said output: wherein the drive train comprises a dual epicyclic gear set having a first set of first sun, planets, planet carrier and annulus; and a second set of second sun, planets, planet carrier and annulus; the second sun being rotationally solid with the first planet carrier; the second planet carrier receiving drive from a pedal, in use; the first sun receiving motor drive from the electric machine, in use; and both the first annulus and the second annulus rotating, in use, with said output.
  • the drive train further comprises a one-way clutch between the second planet carrier and annulus of the epicyclic gear set, to prevent the second planet carrier from rotating faster than the annulus in the direction that causes the cycle to travel forward.
  • the drive train may further comprise a selectively actuable clutch between the second sun and a fixed part of the drive system.
  • the first annulus and second annulus may be formed as a common annulus.
  • a drive system according to any of the preceding aspects of the invention further comprises a free-wheel mechanism that is operative between the pedals and driven wheel of the cycle.
  • the electrical machine is configured to operate selectively as a generator or a motor and the system further comprises a controller that alternately operates the electrical machine as a generator for a first period and then as a motor for a second period, the controller obtaining an indication of torque applied at the inner hub as a function of generator output, and then applying power to the motor as a function of the torque indicated.
  • a drive system may be located at a mid-position of the cycle, wherein said axis is an axis of rotation of the pedals.
  • a drive system may be located at a hub of a driven wheel of the cycle, wherein said axis is an axis of an axle about which the driven wheel rotates.
  • said driven wheel is a rear wheel of the cycle.
  • the invention extends to an electrically-assisted pedal cycle having a drive system according to any of the preceding aspects of the invention.
  • Such an electrically-assisted pedal cycle may be a pedelec in which electrical assistance is provided only when the cyclist is pedalling.
  • electrical assistance may be available both when the cyclist is pedalling and also when the cyclist is not pedalling.
  • Such an electrically-assisted pedal cycle may have a throttle control by which a cyclist can apply or superimpose a desired amount of electrical assistance.
  • a method of operating an electrically-assisted pedal cycle as above comprising the steps of providing motor drive to the driven wheel of the cycle by said electrical machine and providing pedal drive to the driven wheel of the cycle, via said drive train.
  • 'pedelec' means an electrically-assisted pedal cycle in which electrical assistance is provided only when the cyclist is pedalling.
  • Figure 1 is a side view of a pedelec
  • Figure 2 is a mostly sectional view of a drive system for the pedelec
  • Figures 3A and 3B illustrate the motion of gears of an epicyclic gear set of the drive system
  • Figure 4 is a diagrammatic representation of an alternative drive system for the pedelec, employing a compound epicyclic gear set
  • Figure 5 is a diagrammatic representation of another alternative drive system for the pedelec, employing a dual epicyclic gear set;
  • Figure 6 is a mostly sectional view of another alternative drive system for the pedelec, in a mid-drive configuration.
  • Figure 7 is a diagrammatic representation similar to Figure 5, but showing an alternative clutch configuration.
  • FIG. 1 shows a pedelec in the form of a bicycle 10.
  • the bicycle 10 is similar to a conventional bicycle in having a steerable wheel 20 at the front and a driveable wheel 30 at the back.
  • the bicycle 10 also has a conventional arrangement of pedals 40 on crank arms 50 that drive a front toothed cog 60 connected by a chain 70 to a rear sprocket 80, the rear sprocket being mounted co-axially with the rear wheel 30.
  • the bicycle 10 differs from a conventional bicycle in that the rear sprocket 80 is not fixedly mounted to a hub 100 of the rear wheel 30 to drive that wheel directly. Instead, the rear sprocket 80 provides a rider's power input to a drive system that is disposed within the hub 100.
  • a control housing 90 and a battery housing 92 are fitted to the frame of the bicycle 10.
  • a drive system is mounted within the hub 100 and is described as follows, with reference to Figure 2.
  • the hub 100 is referred to in the following as an outer hub 100 and provides an output of the system.
  • the outer hub 100 is typically connected to the outside of the rear wheel 30 by spokes, or by any other connection, to provide drive to the rear wheel 30.
  • the sprocket 80 is not connected directly to the outer hub 100, as would be the case with a regular bicycle. Instead, it is connected to an inner hub 2 (not shown in section) that is mounted on bearings for rotation about a fixed axle 1, which is secured to the bicycle frame.
  • the sprocket 80 incorporates a freewheel mechanism, as found on many regular bicycles.
  • the outer hub 100 is of generally cylindrical shape and is mounted at a first end on the inner hub 2, via a first one-way clutch K. An opposite end of the outer hub 100 is mounted on the axle 1 by way of bearings 101.
  • the outer hub 100 and the inner hub 2 are rotatable about a common axis, which is the axis of the axle 1.
  • the one-way clutch K could be made up of a bearing and a separate clutch.
  • An electrical machine comprises a stator 5 that is fixedly mounted on the axle 1 and a rotor 6 that is mounted on a split shaft 7A, 7B (not shown in section) that is mounted on suitable bearings for rotation about the axle 1.
  • a single epicyclic gear set EP connects the shaft 7B to the outer hub 100.
  • the axle 1 is hollow and receives cables to connect a controller 91 (and a battery 93) to components of the drive system.
  • the shaft 7A could be omitted.
  • the epicyclic gear set EP comprises a sun gear 21 that is mounted on the shaft 7B at one side of the motor 5,6, three planet gears 22 that are mounted on a planet carrier 23, and an annulus gear 24 that is secured to the outer hub 100.
  • the planet carrier 23 is connected to the inner hub 2, to rotate with it.
  • the epicyclic gear set EP thus provides drive between the rotor 6 of the electrical machine and the outer hub 100. It also provides drive between the sprocket 80 and the outer hub 100.
  • the planet carrier 23 is also connected to the axle 1 via a second one-way clutch V. There may be a different number of planet gears 22 - 2, 3 or more.
  • the epicyclic gear set EP translates physical effort from the pedals 40 into motion of the rear wheel 30, via the sprocket 80 and planet carrier 23.
  • the one-way clutch K prevents the planet carrier 23 from rotating faster, in the direction of motion corresponding to the bike moving forward, than the annulus 24 and outer hub 100.
  • Motor drive from the rotor 6 is used to boost speed by driving the sun gear 21 clockwise (as seen from the left-hand side of Figure 2 in the direction of arrow A).
  • the planet carrier 23 would also tend to rotate clockwise, but it is fixed to the axle 1 via the clutch V, which allows the planet carrier 23 to rotate only in an anticlockwise direction.
  • the planet gears 22 rotate anticlockwise, causing anticlockwise rotation of the annulus gear 24 and thus the outer hub 100, in the direction of ride.
  • an electrical boost is provided via the epicyclic gear set.
  • a direct drive is provided from the rotor 6 to the sun 21 and thereby through the gear train to the outer hub 100.
  • Electrical boost is also available at other times when required such as, for example, climbing a hill.
  • the illustrated configuration allows the bicycle 10 to be pushed in a walk-by-side mode, without blocking the hub 100. Whilst pushing, some motor assistance may be provided. For example, according to regulations in the EU, whilst pushing a pedelec, the person pushing the vehicle may use a walk-by-assist button to activate the motor to provide him/her with additional torque up to a bike speed of 6 km/h.
  • An advantage of the design of Figure 2 is that the single epicyclic gear set EP can be relatively light and compact. However, it may be desirable to attain a relatively high gear ratio - for example of the order of 15:1, 18:1 or 25:1. In the configuration of Figure 2, this might dictate a relatively large overall diameter.
  • Figure 4 illustrates an alternative configuration that employs a compound epicyclic gear set, to obtain a relatively high gear ratio for a given torque capacity, without a relatively large overall diameter.
  • corresponding reference numerals denote parts corresponding to those of Figure
  • Figure 4 is somewhat more diagrammatic than Figure 2, but will connect with a controller 91 and battery 93, along the lines of those shown in Figure 2.
  • pedal drive is transmitted to rear sprocket 80 that is connected to planet carrier 23 to drive it in rotation.
  • Planet gears (22) transmit drive to annulus gear 24 that rotates with outer hub 100.
  • each planet gear (22) is of compound configuration, comprising a smaller gear 22a that meshes with the annulus gear 24 and is rotationally solidly connected with a larger gear 22b that meshes with the sun 21 that is driven by the rotor 6 of the motor 5, 6. In this way, the gear ratio afforded by the planet gears (22) between the sun 21 and annulus 24 can be increased, without significantly increasing the overall diameter of the epicyclic gear set.
  • one-way clutch K is connected between the planet carrier 23 and outer hub 100.
  • One-way clutch V is connected between the planet carrier 23 and axle 1.
  • a dual epicyclic gear set is employed, to achieve a high gear ratio and, in particular, a small packaging space for a given torque capacity.
  • the dual epicyclic gear set comprises a first epicyclic set of first sun 21c, planets 22c, planet carrier 23c and annulus 24c; and a second epicyclic set of second sun 21, planets 22, planet carrier 23 and annulus 24.
  • pedal drive is transmitted to rear sprocket 80 that is connected to planet carrier 23 to drive it in rotation.
  • Planet gears 22 transmit drive to annulus gear 24 that rotates with outer hub 100.
  • the sun gear 21 that meshes with the planet gears 22 is rotationally solidly connected to planet carrier 23c of the first epicyclic gear set.
  • Planet carrier 23c meshes with annulus gear 24c that rotates with outer hub 100, and also with sun gear 21c that is driven by the rotor 6 of motor 5, 6.
  • one-way clutch K is connected between the planet carrier 23 and outer hub 100.
  • One-way clutch V is connected between the planet carrier 23 and axle 1.
  • the teeth may have to be relatively wide, to have the requisite strength to transmit the requisite torque.
  • Employing additional gears, as in Figures 4 and 5, may enable less fine teeth requiring less width, and therefore less space and weight.
  • Figure 7 shows an arrangement similar to Figure 5. However, in Figure 7, the one-way clutch V of Figure 5 is replaced with a lockable clutch C connected between the sun 21 and axle 1. Selective actuation of the clutch could be manual or electronic, by a mechanical, electromagnetic or hydraulic arrangement.
  • FIG. 6 The drive system shown in Figure 6 operates in a similar manner to the system of Figure 2. However, the Figure 6 variant is configured for use as a central or mid-drive location, around a spindle connecting two pedal cranks 50.
  • the motor 5, 6 has a stator 5 mounted to a housing 130 that is secured to a frame of the cycle at 140.
  • the housing 130 has bearings 101 at one end, which engage with the shaft 150, and bearings 103 that engage at the other end with an output member 100 which, in turn, is mounted on bearings that engage the shaft 150 and provides the output.
  • the output member 100 and the shaft 150 are rotatable about a common axis, which is the axis of rotation of the pedal cranks 50.
  • the housing 130 has an intermediate wall 131 to form an enclosure around the motor 5, 6.
  • the rotor 6 is mounted on output shaft 7 which, in turn, is mounted on shaft 150 via bearings.
  • Sun gear 21 is mounted on shaft 7.
  • Planet carrier 23 is connected to the intermediate wall 131 of the housing 130, or directly to the housing 130, via one-way clutch V, which grounds the clutch V in one direction.
  • Annulus gear 24 is connected to the output member 100.
  • One-way clutch K is effective between the planet carrier 23 and output member 100, to prevent the pedals from rotating faster than the element transmitting drive to the rear wheel (in Figure 6, this is chain ring or wheel 60).
  • the drive system of Figure 6 operates in a similar manner to that of Figure 2. However, it is more suited to location as a central or mid-drive, adjacent to the pedal cranks 50 and their connecting spindle. In this configuration, the gear ratio of the epicyclic gear set may be different to that in the rear drive configuration. [0071] Whilst the drive system of Figure 6 relates to the embodiment of Figure 2, with a single epicyclic gear set, it may alternatively be configured with a compound or dual epicyclic gear set, along the lines of the embodiments of Figures 4, 5 and 7.
  • the electrical machine 5,6 may be configured to operate selectively as a generator or a motor and the controller 91 alternately operates the electrical machine 5,6 as a generator for a first period and then as a motor for a second period, the controller 91 obtaining an indication of torque applied at the inner hub 2 as a function of generator output, and then applying power to the motor 5,6 as a function of the torque indicated.
  • the controller 91 obtaining an indication of torque applied at the inner hub 2 as a function of generator output, and then applying power to the motor 5,6 as a function of the torque indicated.
  • Such an option needs no modification of the mechanical arrangement of the above-described drive systems. It can be achieved by providing the user with a throttle control - for example, a twist-grip control incorporated in the handlebar of the cycle.
  • the output of the throttle control is connected to the controller 91.
  • the controller 91 runs an algorithm that calculates in real time a PWM value as a command to control the motor 5,6. This PWM value determines how much current is applied to the motor and what torque the motor produces.
  • the rider uses the throttle control to simply increase the motor torque by increasing the PWM value at the rider's will.
  • the motor 5,6 can power the bike at any speed and the rider is not applying any torque to, or rotating the pedals. In this case, the motor will try to turn the planet carrier 23c in the opposite sense to the normal pedal action, but it will be prevented from doing so by the one-way clutch V, therefore propelling the bike forward.
  • the motor 5,6 can power the bike at any speed and the rider is not applying any torque to the pedals.
  • the clutch C needs to be engaged. Then, as before, the motor 5,6 will try to turn the planet carrier 23c in the opposite sense to the normal pedal action, but it will be prevented from doing so by the clutch C, therefore propelling the bike forward.
  • Clutch C may allow the rider to switch between pedelec and throttle modes.
  • both Figures 5 and 7 all of the gears contribute to the overall gear ratio in pedelec mode. In Figure 5, all of the gears contribute to the overall gear ratio from motor to wheel.
  • the embodiments of both Figures 5 and 7 are particularly well suited to transmitting torque that is high for the size of the gear sets, since torque is transmitted to the outer hub 100 via both of the annulus gears 24 and 24c.
  • the above-described and illustrated examples of the invention may provide drive systems for electrically-assisted pedal cycles that are effective whilst being relatively light and compact. They are conducive to providing improved matching, or balancing, between rider input and motor input.
  • the epicyclic gear sets may employ either straight or helical gearing with tooth profiles of either involute or cycloidal geometry - e.g. of the type disclosed in WO 2009/008767 and EP 2177788 - for best trade-off of packaging space and torque capability.
  • the verb “comprise” has its normal dictionary meaning, to denote non-exclusive inclusion. That is, use of the word “comprise” (or any of its derivatives) to include one feature or more, does not exclude the possibility of also including further features.
  • the word “preferable” (or any of its derivatives) indicates one feature or more that is preferred but not essential.

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

Abstract

Dans une bicyclette à pédales à assistance électrique (10), un système d'entraînement comprend une entrée (2) qui reçoit un entraînement d'une pédale (40) de la bicyclette (10) et une sortie (100) qui fournit un entraînement à une roue entraînée (30) de la bicyclette (10). Une machine électrique (5, 6) fournit un entraînement de moteur à la sortie (100). Un train d'entraînement reçoit l'entraînement de la machine électrique (5, 6) et de la pédale (40) et transmet l'entraînement à la sortie (100). Le train d'entraînement comprend un ensemble de réducteurs épicycliques EP ayant un planétaire (21), un porte-satellites (23), une pluralité d'engrenages planétaires (22) et un engrenage annulaire (24) qui tourne avec la sortie (100). L'ensemble de réducteurs épicycliques EP transmet l'entraînement de la pédale (40) à son engrenage annulaire (24) par l'intermédiaire de son porte-satellites (23). Le planétaire (21) est entraîné par la machine électrique (5, 6). Le train d'entraînement comprend également un embrayage unidirectionnel V entre le porte-satellites (23) et une partie fixe (1) du système d'entraînement, pour permettre la rotation du porte-satellites (23) dans une seule direction.
PCT/GB2022/051719 2021-07-06 2022-07-04 Bicyclettes à pédales à assistance électrique WO2023281249A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB2109756.3 2021-07-06
GB2109756.3A GB2608625B (en) 2021-07-06 2021-07-06 Electrically-assisted pedal cycles

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WO2023281249A1 true WO2023281249A1 (fr) 2023-01-12

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Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2873090A1 (fr) * 2004-07-16 2006-01-20 Inivi T Sarl Moyeu de roue comprenant un dispositif pour l'assistance au pedalage et des moyens de changement de vitesses integres et bicyclette equipee dudit moyeu
WO2009008767A1 (fr) 2007-07-09 2009-01-15 Stanovskoy Viktor Vladimirovic Engrenage de roues dentées (variantes) et mécanisme denté planétaire reposant sur celui-ci (variantes)
US20090305831A1 (en) * 2004-09-29 2009-12-10 Frank Moeller Hubs incorporating a variable ratio transmission system
WO2010092345A1 (fr) 2009-02-12 2010-08-19 Nexxtdrive Limited Système de transmission pour bicyclette
WO2017021715A1 (fr) 2015-07-31 2017-02-09 Nexxt E-Drive Ltd., Procédé d'utilisation d'un cycle à pédales avec dispositif d'entraînement électromécanique
WO2018020259A1 (fr) 2016-07-29 2018-02-01 Nexxt E-Drive Limited Activateur de stimulation pour un vélo électrique
US20180057107A1 (en) * 2016-08-23 2018-03-01 Shimano Inc. Bicycle hub assembly and bicycle control system
DE102017213303A1 (de) * 2017-08-01 2019-02-07 Institut für Automatisierung und Informatik GmbH, Zentrum für industrielle Forschung und Entwicklung Motoranordnung für ein zumindest teilweise muskelbetriebenes fahrzeug
WO2020245591A1 (fr) * 2019-06-05 2020-12-10 Ebike Systems Ltd Cycles à pédales à assistance électrique
WO2021080431A1 (fr) * 2019-10-25 2021-04-29 Advatech B.V. Système de transmission

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2873090A1 (fr) * 2004-07-16 2006-01-20 Inivi T Sarl Moyeu de roue comprenant un dispositif pour l'assistance au pedalage et des moyens de changement de vitesses integres et bicyclette equipee dudit moyeu
US20090305831A1 (en) * 2004-09-29 2009-12-10 Frank Moeller Hubs incorporating a variable ratio transmission system
WO2009008767A1 (fr) 2007-07-09 2009-01-15 Stanovskoy Viktor Vladimirovic Engrenage de roues dentées (variantes) et mécanisme denté planétaire reposant sur celui-ci (variantes)
EP2177788A1 (fr) 2007-07-09 2010-04-21 Closed Joint Stock Company "Technology Market" Engrenage de roues dentées (variantes) et mécanisme denté planétaire reposant sur celui-ci (variantes)
WO2010092345A1 (fr) 2009-02-12 2010-08-19 Nexxtdrive Limited Système de transmission pour bicyclette
WO2017021715A1 (fr) 2015-07-31 2017-02-09 Nexxt E-Drive Ltd., Procédé d'utilisation d'un cycle à pédales avec dispositif d'entraînement électromécanique
WO2018020259A1 (fr) 2016-07-29 2018-02-01 Nexxt E-Drive Limited Activateur de stimulation pour un vélo électrique
US20180057107A1 (en) * 2016-08-23 2018-03-01 Shimano Inc. Bicycle hub assembly and bicycle control system
DE102017213303A1 (de) * 2017-08-01 2019-02-07 Institut für Automatisierung und Informatik GmbH, Zentrum für industrielle Forschung und Entwicklung Motoranordnung für ein zumindest teilweise muskelbetriebenes fahrzeug
WO2020245591A1 (fr) * 2019-06-05 2020-12-10 Ebike Systems Ltd Cycles à pédales à assistance électrique
WO2021080431A1 (fr) * 2019-10-25 2021-04-29 Advatech B.V. Système de transmission

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TW202315806A (zh) 2023-04-16
GB2608625B (en) 2024-01-17
GB2608625A (en) 2023-01-11
GB202109756D0 (en) 2021-08-18

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