DE102014206809A1 - Device for operating an electric bicycle - Google Patents

Device for operating an electric bicycle Download PDF

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Publication number
DE102014206809A1
DE102014206809A1 DE102014206809.6A DE102014206809A DE102014206809A1 DE 102014206809 A1 DE102014206809 A1 DE 102014206809A1 DE 102014206809 A DE102014206809 A DE 102014206809A DE 102014206809 A1 DE102014206809 A1 DE 102014206809A1
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DE
Germany
Prior art keywords
counterpart
driver
transmission
recess
electric bicycle
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.)
Pending
Application number
DE102014206809.6A
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German (de)
Inventor
Michael Schlotter
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.)
Conti Temic Microelectronic GmbH
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Conti Temic Microelectronic 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 Conti Temic Microelectronic GmbH filed Critical Conti Temic Microelectronic GmbH
Priority to DE102014206809.6A priority Critical patent/DE102014206809A1/en
Publication of DE102014206809A1 publication Critical patent/DE102014206809A1/en
Pending legal-status Critical Current

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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B62LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62MRIDER PROPULSION OF WHEELED VEHICLES OR SLEDGES; POWERED PROPULSION OF SLEDGES OR SINGLE-TRACK CYCLES; TRANSMISSIONS SPECIALLY ADAPTED FOR SUCH VEHICLES
    • B62M6/00Rider propulsion of wheeled vehicles with additional source of power, e.g. combustion engine or electric motor
    • B62M6/40Rider propelled cycles with auxiliary electric motor
    • B62M6/55Rider propelled cycles with auxiliary electric motor power-driven at crank shafts parts

Abstract

An apparatus for operating an electric bicycle (1) comprises a torque transmission element (3) comprising a driver (5) and a counterpart (7). The driver (5) has at least one transmission element (11) and the counterpart (7) at least one recess (13). The at least one transmission element (11) of the driver (5) can be arranged within the at least one recess (13) of the counterpart (7). In a first state of the driver (5) and the counterpart (7) relative to a rotation axis (9) by a free rotation angle (A) relative to each other rotatably rotatable. The free rotation angle (A) is determined in this context by a geometry of the at least one transmission element (11) and the at least one recess (13). In a second state, the at least one transmission element (11) of the driver (5) and the at least one recess (13) of the counterpart (7) are in contact such that a torque is transmitted between the driver (5) and the counterpart (7) becomes.

Description

  • The present invention relates to a device for operating an electric bicycle, in which a torque transmission element is designed as a play-related coupling.
  • Electric bicycles with pedal assistance are usually two-, three- or four-wheeled vehicles, which are equipped with pedal cranks and an electric drive unit. These electric bicycles, also called pedelecs, can not be driven solely by the electric drive unit, but also always require a certain amount of human driving power that a cyclist has to apply by means of the pedal cranks. The electric drive unit is therefore an auxiliary engine and drives the electric bike only if the cyclist contributes his part.
  • For example, the human driving power mechanically applied by the cyclist by means of the pedal cranks is converted into propulsive power in a drivetrain together with the assisting electric drive power of the electric drive unit. The propulsive power is then distributed to one or more wheels of the electric bicycle. In this context, based on the pedal cranks, the human driving power is transmitted via a component of the electric bicycle to the drive train, which is designed as a freewheel or as a rigid connection, which has different effects on a driving condition and driving comfort of the electric bicycle.
  • It is an object to provide a device for an electric bicycle which is capable of easily transmitting a human driving power so as to enable a low-cost construction of an electric bicycle as well as to increase ride comfort and driving safety.
  • According to a first aspect of the invention, an apparatus for operating an electric bicycle has a torque transmission element comprising a driver and a counterpart, which are arranged concentrically, in particular with respect to a rotation axis. The driver has at least one transmission element and the counterpart at least one recess. The at least one transmission element of the driver is arranged in an operation of the electric bicycle within the at least one recess of the counterpart. In a first state of the driver and the counterpart relative to the axis of rotation are rotatable relative to each other rotatable about a free rotation angle. The free rotation angle is determined in this context by a geometry of the at least one transmission element and the at least one recess. In a second state, the at least one transmission element of the driver and the at least one recess of the counterpart are in contact such that a torque between the driver and the counterpart is transmitted.
  • In this way, a torque transmission element is realized by means of the driver and the counterpart, which allows a certain freewheel when generating a human driving power by a cyclist of the electric bicycle and thereby acts as a game-driven clutch.
  • Based on the free rotation angle between the driver and the counterpart substantially no torque is transmitted in the first state, but only when the driver and the counterpart, or more precisely the transmission element of the driver and a stop of the recess of the counterpart, in the second state in Contact and by the cyclist further a human driving power is generated by means of pedal cranks.
  • For example, the torque transmitting element is disposed between a bottom bracket shaft and a summation shaft of the electric bicycle, thus enabling the simple transmission of the human driving power applied by the cyclist to the summation shaft.
  • A positive connection between the driver and the counterpart need not necessarily comprise only a single transmission element of the driver and a single recess of the counterpart, but preferably includes two to four transmission elements and recesses, which are arranged radially around the axis of rotation.
  • In contrast to a continuous freewheel, the described device also makes it possible to implement a coaster brake function without having to implement any additional technical outlay. In addition, only a few components are needed to implement the device, so that costs and weight are saved and a susceptibility to failure of a drive system is reduced.
  • Compared to a rigid connection between crankshaft and summation shaft, it is possible due to the described torque transmitting element reliably and smoothly decelerate the supporting electric drive unit, for example, when the cyclist suddenly ceases to operate the pedal cranks of the electric bicycle. In this context It is possible to dispense with costly sensors and complex control algorithms and it is made a contribution to keep vibration, noise and component wear of the electric bicycle low.
  • According to one embodiment of the first aspect, the at least one recess of the counterpart on at least one stop, so that in the second state, the at least one transmission element of the driver is in contact with exactly one stop the at least one recess of the counterpart, so that a torque between the driver and is transmitted to the counterpart.
  • Since the at least one transmission element of the driver in the second state is in contact with a stop of the at least one recess of the counterpart, a torque is transmitted by the cyclist by actuating the pedal cranks between the driver and the counterpart. In this way, the generated human driving power is transmitted between, for example, bottom bracket shaft and summation shaft.
  • According to a further embodiment of the first aspect, the free rotation angle is designed such that it allows a free rotation of the driver relative to the counterpart in a range of 10 ° to 120 °. This range for the free rotation angle between the driver and the counterpart is advantageous, for example, in a direct connection of the bottom bracket and the driver. Even if an optional transmission in the drive system of the electric bicycle between bottom bracket and summation shaft realizes a ratio of one, the specified range for the free rotation angle is beneficial. In this context, a free rotation angle between 20 ° and 60 ° is particularly preferred. Since the free angle of rotation is dependent on the design and determined by the geometry of the transmission element of the driver and the recess of the counterpart, in principle any range between 0 ° and 360 ° can be realized. The at least one transmission element of the driver and the at least one recess of the counterpart must accordingly be geometrically formed.
  • According to a further embodiment of the first aspect, the at least one transmission element of the driver and the at least one recess of the counterpart are arranged radially with respect to the axis of rotation.
  • In this context, the transmission element of the driver and the recess of the counterpart, for example, axially projecting, so that they are arranged for example on a surface of the driver or the counterpart.
  • According to a further embodiment of the first aspect, the at least one transmission element of the driver is in the form of a pin and the at least one recess of the counterpart is in the form of a slot.
  • With this configuration of the at least one transmission element and the at least one recess, it is possible to easily transmit the torque generated by the cyclist and the human driving power by means of the torque transmission element, for example, to the summation shaft of the electric bicycle. In this context, for example, two pin-shaped transmission elements are arranged mirror-symmetrically with respect to the axis of rotation on the driver and thus form substantially an angle of 180 ° to each other. The free angle of rotation between the driver and counterpart is determined in relation to this embodiment, for example by a radius of the pin-shaped transmission element and a length of the slot.
  • According to a further embodiment of the first aspect, the at least one transmission element of the driver in the form of a wedge and the at least one recess of the counterpart is formed as a wedge-shaped groove.
  • This embodiment provides a further possibility of the geometric embodiment of the transmission element and the recess and thus allows a simple construction of the torque transmission element with a certain freewheel.
  • According to a further embodiment of the first aspect, the at least one transmission element is formed on a surface of the driver and the at least one recess is formed starting from an inner surface of the counterpart.
  • The recess of the counterpart has been drilled or milled, for example, starting from the axis of rotation radially outward into the counterpart. In this way it is possible to remove controlled material of the counterpart and so for example to form at least one recess in the form of a slot or a wedge-shaped groove.
  • According to a further embodiment of the first aspect, the at least one transmission element on a side surface of the driver and the at least one recess is formed starting from a side surface of the counterpart.
  • According to a further embodiment of the first aspect of the driver and the counterpart are formed substantially annular.
  • According to a further embodiment of the first aspect, the device comprises at least one human drive unit and an electric drive unit for the electric bicycle. In this context, the driver and the counterpart are structurally arranged between the human drive unit and the electric drive unit of the electric bicycle.
  • In this connection, the human driving unit, for example, refers to a cyclist who operates the pedal cranks of the electric bicycle and sets them in a mechanical rotary motion. The pedal cranks of the electric bicycle are usually mounted on a bottom bracket, which includes the bottom bracket. The torque transmitting element is arranged, for example, between the bottom bracket and the summation of the electric bicycle, so as to allow a kind of play clutch due to the existing free rotation angle between the driver and counterpart in transmitting the torque generated by the cyclist and the human driving power to the summation.
  • This play clutch provides a certain freewheel of the torque transmitting element, which has a lower component wear compared to a complete freewheel and thereby cost in the construction and maintenance of the electric bicycle can be realized.
  • Embodiments of the invention are explained in more detail below with reference to the schematic drawings. The figures show:
  • 1 a block diagram for operating an electric bicycle,
  • 2 an embodiment of a mid-motor drive unit of an electric bicycle,
  • 3A - 3D Embodiments of a torque transmission element,
  • 4A - 4D further embodiments of a torque transmission element.
  • In 1 is the principle of operation of a drive system based on a block diagram 27 an electric bicycle 1 shown. An electric drive power is by means of an electric drive unit 25 to a summation wave 28 of the electric bicycle 1 transfer. In addition, by means of a human drive unit 26 which is realized for example by a cyclist, the pedal cranks of the electric bicycle 1 actuated and set in a mechanical rotary motion, a human driving power applied and, inter alia, by a torque transmitting element 3 to the summation wave 28 of the electric bicycle 1 transfer. The torque transmitting element in this context is a component of the human drive unit 26 , By means of the summation wave 28 becomes the sum of the human driving power and the supporting electric drive power on a drive unit 29 transmit a propulsive power to one or more wheels of the electric bicycle 1 transfers.
  • In this context are considered optional components of the electric bicycle 1 transmission 31 and freewheels 33 shown with dashed lines. These are, for example, between the electric drive unit 25 and / or the human drive unit 26 and the summation wave 28 and between the summation wave 28 and the drive unit 29 arranged. The necessary components of the drive system 27 are shown by solid lines.
  • In 2 is an embodiment of a drive system 27 a center motor drive unit of the electric bicycle 1 represented, which is a housing 41 includes, in which the electric drive unit 25 is arranged. About a freewheel 33 and a gearbox 31 becomes the assisting electric drive power on the summation shaft 28 transfer. The human driving power generated by the cyclist is by means of a bottom bracket shaft 43 on the summation wave 28 transfer. Between the bottom bracket shaft 43 and the summation wave 28 is a rotation transmission element 3 arranged that as a play clutch a certain freewheel between the bottom bracket 43 and the summation wave 28 allows. Outside the case 41 is at the summation wave 28 the drive unit 29 attached, which converts the electric drive power and the human driving power into a propulsive power.
  • In the 3A to 3D is the torque transmitting element 3 shown in two different embodiments. The torque transmitting element 3 each includes a driver 5 and a counterpart 7 , The driver 5 and the counterpart 7 are annular and related to a rotation axis 9 arranged concentrically.
  • The driver 5 in 3A has two pin-shaped transmission elements 11 on that on a surface 15 of the driver 5 are arranged. In addition, the driver points 5 a circular central recess 16 on. The counterpart 7 points next to a circular central recess 18 two more recesses 13 in the form of oblong holes. In addition, the recesses point 13 in the direction of rotation about the axis of rotation in each case two stops 14 on, in the further course when transmitting a torque with the transmission elements 11 of the driver 5 interact. The recesses 13 as well as the attacks 14 For example, they were drilled from a surface 20 and / or an inner surface 17 the counterpart 7 educated.
  • The two transmission elements 11 of the driver 5 and the two recesses 13 the counterpart 7 are in this embodiment with respect to the axis of rotation 9 arranged mirror-symmetrically and thus form substantially an angle of 180 ° to each other.
  • In 3B is the driver 5 out 3A within the central recess 18 the counterpart 7 arranged. In addition, the two pin-shaped transmission elements 11 of the driver 5 within the two recesses 13 the counterpart 7 arranged and are each in contact with exactly one stop 14 the respective recess 13 ,
  • In this way, by means of the driver 5 and the counterpart 7 a torque transmitting element 3 realized with a free rotation angle, the free rotation of the driver 5 relative to the counterpart 7 allows, without a torque is transmitted. It is thus realized a certain freewheel, by the geometry of the recesses 13 and the transmission elements 11 is determined. In this embodiment, the free rotation angle A between driver 5 and counterpart 7 through the radii of the pin-shaped transmission elements 11 and the lengths of the recesses formed as a slot 13 certainly.
  • In this context, an advantageous range for the free rotation angle A of 10 ° to 120 ° and particularly preferred is a free rotation angle A between 20 ° and 60 °. In the illustrated embodiments in the 3A - 3D and 4A - 4D allows the free rotation angle A free rotation of 45 ° of the driver 5 relative to the counterpart 7 ,
  • Is no transmission element 11 with a stop 14 in contact, during an operation of the electric bicycle 1 justified by the free rotation angle A substantially no torque between the driver 5 and the counterpart 7 transfer. Only if at least one transmission element 11 and at least one stop 14 Being in contact is by the cyclist of the electric bicycle 1 a torque and a human driving power by means of the pedal cranks, for example, on the summation shaft 28 transfer.
  • In 3C and 3D has the driver 5 two transmission elements 11 on that, unlike 3A and 3B are formed in the form of a wedge. The counterpart 7 points in contrast to 3A and 3B two recesses 13 on, which are formed as a wedge-shaped groove and in their geometry complementary to the geometry of the transmission elements 11 of the driver 5 are executed.
  • The recesses 13 the counterpart 7 In this context, for example, by a milling process, starting from the central recess 18 been trained. Accordingly, for example, was removed from an annular body material and so the driver 5 with the two transmission elements 11 each formed in the form of a wedge.
  • In 4A and 4B has the driver 5 In analogy to 3A and 3B two transmission elements 11 each in the form of a pen. The counterpart 7 also indicates by analogy 3A and 3B two recesses 13 each in the form of oblong holes. The difference is that the transmission elements 11 in this embodiment 4A and 4B on a side surface 19 of the driver 5 are attached. Also the recesses 13 the counterpart 7 are different in this embodiment 3A and 3B on a side surface 21 the counterpart 7 arranged.
  • While the driver 5 the embodiments of the 3A - 3D in the central recess 18 the counterpart 7 is arranged and the counterpart 7 the driver 5 geometrically spanned, are the driver 5 and the counterpart 7 the embodiments of the 4A - 4D with respect to a radius of substantially equal size and juxtaposed along the axis of rotation 9 arranged.
  • In 4C and 4D has the driver 5 In analogy to 3C and 3D two transmission elements 11 each in the form of a wedge. The counterpart 7 also indicates by analogy 3C and 3D two recesses 13 each as a wedge-shaped groove. The two transmission elements 11 and the two recesses 13 are as in the embodiments in 4A and 4B on the side surface 19 of the driver 5 and on the side surface 21 the counterpart 7 arranged.
  • The positive connection between the driver 5 and the counterpart 7 does not necessarily have two transmission elements 11 and two recesses 14 but it must be at least one transmission element 11 of the driver 5 and at least one recess 13 the counterpart 7 be formed to a free angle of rotation A of the torque transmitting element 3 to realize. Preferably, two to four transmission elements 11 and recesses 13 at the driver 5 and the counterpart 7 radially with respect to the axis of rotation 9 arranged.
  • In this context, the driver 5 and the at least one transmission element 11 For example, integrally formed or alternatively realized as a multi-part components that are positively and / or non-positively and / or cohesively coupled to each other.
  • In contrast to a continuous freewheel with the described embodiments, the implementation of a coaster brake function of the electric bicycle 1 allows to realize without additional technical effort. To realize such a drive system 27 Only a few components are required, so that costs and weight are saved and a susceptibility to failure of the drive system 27 is reduced.
  • Combinations of the illustrated embodiments and further embodiments are feasible and allow further constructions of a torque transmission element 3 with a free angle of rotation A, where a driver 5 and a counterpart 7 are formed rotatable relative to each other rotatable. In this way, the transmission of a torque with play clutch is enabled.
  • LIST OF REFERENCE NUMBERS
  • 1
    electric bicycle
    3
    Torque transmission member
    5
    takeaway
    7
    counterpart
    9
    axis of rotation
    11
    transmission element
    13
    recess
    14
    attack
    15
    Surface driver
    16
    Central recess driver
    17
    Inner surface counterpart
    18
    Central recess counterpart
    19
    Side surface driver
    20
    Surface counterpart
    21
    Side surface counterpart
    25
    electric drive unit
    26
    human drive unit
    27
    drive system
    28
    Summation wave
    29
    drive unit
    31
    transmission
    33
    freewheel
    41
    casing
    43
    bottom bracket
    A
    angle of rotation

Claims (10)

  1. Device for operating an electric bicycle ( 1 ), - which is a torque transmission element ( 3 ) having a driver ( 5 ) and a counterpart ( 7 ), wherein the driver ( 5 ) at least one transmission element ( 11 ) and its counterpart ( 7 ) at least one recess ( 13 ), wherein the at least one transmission element ( 11 ) of the driver ( 5 ) within the at least one recess ( 13 ) of the counterpart ( 7 ) can be arranged, - in the first state of the driver ( 5 ) and its counterpart ( 7 ) relative to a rotation axis ( 9 ) are rotatable about a free angle of rotation (A) relative to each other, wherein the free angle of rotation (A) by a geometry of the at least one transmission element ( 11 ) and the at least one recess ( 13 ), and - in the second state, the at least one transmission element ( 11 ) of the driver ( 5 ) and the at least one recess ( 13 ) of the counterpart ( 7 ) are in contact such that a torque between the driver ( 5 ) and its counterpart ( 7 ) is transmitted.
  2. Device according to claim 1, - in which the at least one recess ( 13 ) of the counterpart ( 7 ) at least one stop ( 14 ), and - in the second state, the transmission element ( 11 ) of the driver ( 5 ) is in contact with exactly one stop ( 14 ) of the counterpart ( 7 ), so that a torque between the driver ( 5 ) and its counterpart ( 7 ) is transmitted.
  3. Device according to one of claims 1 or 2, - in which the free rotation angle (A) a free rotation of the driver ( 5 ) relative to the counterpart ( 7 ) in a range of 10 ° to 120 °.
  4. Device according to one of claims 1 to 3, - in which the at least one transmission element ( 11 ) of the driver ( 5 ) and the at least one recess ( 13 ) of the counterpart ( 7 ) radially with respect to the axis of rotation ( 9 ) are arranged.
  5. Device according to one of claims 1 to 4, - in which the at least one transmission element ( 11 ) of the driver ( 5 ) in the form of a pin and the at least one recess ( 13 ) of the counterpart ( 7 ) are formed in the form of a slot.
  6. Device according to one of claims 1 to 5, - in which the at least one transmission element ( 11 ) of the driver ( 5 ) in the form of a wedge and the at least one recess ( 13 ) of the counterpart ( 7 ) are formed as a wedge-shaped groove.
  7. Device according to one of claims 1 to 6, - in which the at least one transmission element ( 11 ) on a surface ( 15 ) of the driver ( 5 ) and the at least one recess ( 13 ) starting from an inner surface ( 17 ) and / or surface ( 20 ) of the counterpart ( 7 ) are formed.
  8. Device according to one of claims 1 to 7, - in which the at least one transmission element ( 11 ) on a side surface ( 19 ) of the driver ( 5 ) and the at least one recess ( 13 ) starting from a side surface ( 21 ) of the counterpart ( 7 ) are formed.
  9. Device according to one of claims 1 to 8, - in which the driver ( 5 ) and its counterpart ( 7 ) are formed substantially annular.
  10. Device according to one of the preceding claims, - the at least one human drive unit ( 26 ) and an electric drive unit ( 25 ) for the electric bicycle ( 1 ), and - in which the driver ( 5 ) and its counterpart ( 7 ) structurally between the human drive unit ( 26 ) and the electric drive unit ( 25 ) are arranged.
DE102014206809.6A 2014-04-09 2014-04-09 Device for operating an electric bicycle Pending DE102014206809A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE102014206809.6A DE102014206809A1 (en) 2014-04-09 2014-04-09 Device for operating an electric bicycle

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102014206809.6A DE102014206809A1 (en) 2014-04-09 2014-04-09 Device for operating an electric bicycle

Publications (1)

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DE102014206809A1 true DE102014206809A1 (en) 2015-10-15

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Family Applications (1)

Application Number Title Priority Date Filing Date
DE102014206809.6A Pending DE102014206809A1 (en) 2014-04-09 2014-04-09 Device for operating an electric bicycle

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102018202418A1 (en) * 2018-02-16 2019-08-22 Brose Antriebstechnik GmbH & Co. Kommanditgesellschaft, Berlin Shaft assembly and drive device for an electric bike

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010017917A1 (en) * 2010-04-21 2011-10-27 Daum Gmbh & Co. Kg Power transmission unit

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010017917A1 (en) * 2010-04-21 2011-10-27 Daum Gmbh & Co. Kg Power transmission unit

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102018202418A1 (en) * 2018-02-16 2019-08-22 Brose Antriebstechnik GmbH & Co. Kommanditgesellschaft, Berlin Shaft assembly and drive device for an electric bike

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