WO2022258145A1 - Ensemble de fixation de moteur central de vélo électrique - Google Patents

Ensemble de fixation de moteur central de vélo électrique Download PDF

Info

Publication number
WO2022258145A1
WO2022258145A1 PCT/EP2021/065269 EP2021065269W WO2022258145A1 WO 2022258145 A1 WO2022258145 A1 WO 2022258145A1 EP 2021065269 W EP2021065269 W EP 2021065269W WO 2022258145 A1 WO2022258145 A1 WO 2022258145A1
Authority
WO
WIPO (PCT)
Prior art keywords
clamping surface
side wall
electric bicycle
drive unit
frame
Prior art date
Application number
PCT/EP2021/065269
Other languages
German (de)
English (en)
Inventor
Otto Vargovics
Original Assignee
Amprio 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 Amprio Gmbh filed Critical Amprio Gmbh
Priority to PCT/EP2021/065269 priority Critical patent/WO2022258145A1/fr
Priority to DE112021007777.5T priority patent/DE112021007777A5/de
Publication of WO2022258145A1 publication Critical patent/WO2022258145A1/fr

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
    • B62K—CYCLES; CYCLE FRAMES; CYCLE STEERING DEVICES; RIDER-OPERATED TERMINAL CONTROLS SPECIALLY ADAPTED FOR CYCLES; CYCLE AXLE SUSPENSIONS; CYCLE SIDE-CARS, FORECARS, OR THE LIKE
    • B62K19/00—Cycle frames
    • B62K19/30—Frame parts shaped to receive other cycle parts or accessories

Definitions

  • the invention relates to a
  • An electric bicycle is to be understood here as any type of bicycle that has a supporting electric drive unit that supplements the human drive power introduced by a rider into a bottom bracket shaft with a corresponding electromotive drive power, if this is desired.
  • the present invention relates to the attachment of a so-called
  • Mid-engine drive unit which supports both the crankshaft in rotation and has an output shaft.
  • the output shaft drives via an output element, for example a chain ring, a finter wheel of the electric bicycle.
  • output element for example a chain ring, a finter wheel of the electric bicycle.
  • very high mechanical forces can act on the drive unit via the bottom bracket shaft and the output shaft for a short period of time.
  • Fastening arrangements are known in which, at least at one point of the power flow between the drive housing of the drive unit and a frame-side central motor receiving arrangement, in particular the translational vertical forces and/or the rotational forces are transmitted Shear forces are transmitted in fasteners between the drive housing and the receiving assembly.
  • the object of the invention is to create an electric bicycle central motor attachment arrangement with improved power transmission between the drive unit and the attachment arrangement on the frame.
  • the directional information refers to a forward-moving electric bicycle that is standing on a horizontal plane.
  • a lateral side is therefore the right or the left side of the electric bicycle.
  • Mounting assembly consists of a bicycle frame with a frame-side mid-motor mount assembly and a modular electric bicycle mid-motor drive unit mounted in the mid-motor mount assembly.
  • the drive unit has a supporting drive housing, an electric drive motor, a bottom bracket shaft penetrating the drive housing in the transverse direction, and an output shaft parallel thereto.
  • the bottom bracket shaft and the output shaft can be formed by a single shaft.
  • the bottom bracket shaft and the output shaft are particularly preferably separate shafts.
  • the bottom bracket shaft and the output shaft are particularly preferably mounted coaxially with one another in the drive housing. While the bottom bracket shaft penetrates the drive housing on both lateral sides, based on the direction of travel of the electric bicycle, the output shaft penetrates the Drive housing only laterally on one side, usually on the left lateral side.
  • a substantially annular radial clamping ring is assigned to the drive housing on at least one lateral side of the drive unit and coaxially to the axis of the bottom bracket bearing, the radial clamping ring having a circular outer clamping surface.
  • the outer clamping surface is designed to enter into an indirect or direct radial tensioning or clamping connection with a corresponding frame-side inner clamping surface.
  • the receiving arrangement assigned to the bicycle frame has, on at least one lateral side, a clamping ring arrangement fastened to the bicycle frame with a frame-side side wall that is essentially in a vertical plane and forms an inner clamping surface in which the corresponding outer clamping surface of the drive-side radial clamping ring sits in a clamping or non-positive manner. Furthermore, the receiving arrangement has a tangential tension element, through which the inner clamping surface is contracted in the circumferential direction or slightly reduced radially, so that the inner clamping surface of the side wall is firmly clamped by the outer clamping surface of the drive unit.
  • a tangential tension element is to be understood as meaning a machine element that pulls together the entire circular inner clamping surface, which can be formed both by the relevant side wall and by another machine element, in the circumferential direction or radially.
  • the tangentiality of the tension element thus relates to the effect of the tension element that narrows the inner clamping surfaces.
  • the tangential tension element preferably lies in the plane that is spanned by the two clamping surfaces. Large translational forces as well as large torques can be transmitted via the two circular clamping surfaces connected to one another in a combined positive and non-positive connection.
  • tangential tension element Since the tangential tension element is also arranged approximately in the vertical plane, essentially tension forces are transmitted via the tangential tension element, whereas shear forces represent at most a small force component. Furthermore, a clamping ring attachment places only low demands on the manufacturing tolerances of the receiving arrangement. In practice, this is of great importance because the drive units usually come from a different manufacturer than the bicycle frame in which the drive units are installed.
  • the outer clamping surface of the radial clamping ring on the drive side is in direct contact with the corresponding inner clamping surface of the receiving arrangement.
  • a separating ring is arranged between the outer clamping surface of the drive unit and the inner clamping surface of the side wall, which separates the two clamping surfaces slightly from one another and consists of a different material than the side wall.
  • the separating ring is preferably softer than the components forming the inner clamping surface and the outer clamping surface, and the separating ring is particularly preferably made of plastic.
  • the separating ring has a tolerance-compensating effect due to its plastic and/or elastic compressibility.
  • the separating ring consists of an electrically non-conductive material, it ensures galvanic isolation, so that bimetal corrosion is prevented when using different metals for the drive housing on the one hand and the side wall on the frame side on the other hand.
  • the outer clamping surface and the corresponding inner clamping surface viewed in the cross section of the clamping surface, can each have a conical, convex-concave or concave-convex or other cross-sectional shape.
  • the outer clamping surface and the corresponding inner clamping surface are essentially cylindrical.
  • the clamping surfaces can be roughened or structured differently in order to increase the friction between the clamping surfaces and the separating ring.
  • the inner clamping surface formed by the side wall extends over a clamping surface angle of at least 120° to a maximum of 180°, based on the bottom bracket axis.
  • the clamping surface angle is the angle of the inner clamping surface formed by the side wall.
  • the complementary opening angle is therefore in any case equal to or greater than 180°, so that the outer clamping surface of the drive-side radial clamping ring can be inserted in the radial direction into the inner clamping surface of the side wall.
  • the tangential tension element is preferably designed as a U-shaped tension bracket, the two bracket ends of which are anchored in the side wall.
  • the tension bracket particularly preferably forms exactly a semicircular loop, so that the two bracket ends are exactly parallel to one another are aligned.
  • the clamping bracket can be inserted with its bracket ends into corresponding tangential bores in the side wall and fixed there.
  • the bracket ends can be fixed or anchored in the side edge, for example, with threaded nuts, which are screwed onto the two bracket ends, each of which is provided with an external thread.
  • the side wall is preferably formed in one piece with the bicycle frame.
  • the side wall can be a monolithic part of the other parts of the bicycle frame, or it can be connected in one piece to the other parts via a welded joint. In this way, the forces are transferred over a large area from the side wall to the rest of the bicycle frame.
  • the inner clamping surface formed by the side wall extends over a clamping surface angle of at least 181° and at most 359° in relation to the bottom bracket axis. The opening angle that is complementary to this is therefore less than 180°.
  • the radial clamping ring on the drive side must therefore be inserted axially into the opening in the relevant side wall on the frame side that defines the inner clamping surface.
  • the side wall inner clamping surface is simply interrupted by a separating slot.
  • the sections of the side wall in question that are separated from one another by the separating slot are pulled together by the tangential tension element designed as a linear tension bolt, so that in this way the inner clamping surface in question is pulled together in the circumferential direction and consequently radially, so that the radial clamping ring on the drive side is clamped.
  • the frame-side side wall can be dimensioned and designed so that they can also absorb and transmit very high translational and rotational forces without any problems.
  • the side wall having the inner clamping surface is preferably formed separately from the bicycle frame and is fastened or mounted on the bicycle frame by fastening elements.
  • a separate side wall is particularly preferably provided on each of the two lateral sides.
  • Each side wall is first loosely mounted on the relevant left and right radial clamping ring, and only then are the two side walls fastened or mounted on the bicycle frame. Then the tangential tension elements are finally tightened.
  • the design and position of the fastening elements for fastening the side walls to the bicycle frame can be designed and selected relatively freely, and can be specifically targeted where the forces are introduced directly into the seat tube, the down tube and/or the rear wheel stays.
  • FIG. 1 shows a perspective view of a first embodiment of an electric bicycle central motor fastening arrangement with a frame-side receiving arrangement, which is designed as a clamping plate, and a drive unit mounted therein,
  • FIG. 2 shows a vertical longitudinal section II-II of a frame-side left side wall of the receiving arrangement or the fastening arrangement of FIG. 1
  • Figure 3 shows a cross section III - III of the fastening arrangement of Figures 1 and 2
  • Figure 4 shows a cross section IV - IV of the fastening arrangement of Figures 1-3
  • Figure 5 shows a perspective view of a second embodiment of an electric bicycle central motor mounting arrangement with a frame-side mounting arrangement including a tension bracket and a drive unit mounted in the mounting arrangement,
  • Figure 6 shows a cross section VI - VI of the fastening arrangement of Figures 5 and 7, and Figure 7 shows a vertical longitudinal section VII - VII of the left receiving arrangement or fastening arrangement of Figures 5 and 6.
  • the drive unit 40 is designed as a central motor, so it carries and supports both a bottom bracket shaft 50 and an output shaft 52.
  • the drive unit 40 works in a purely supportive manner during regular ferry operation, and supports the humane drive power of a driver during ferry operation, which he uses two pedal cranks (not shown) in the bottom bracket shaft 50 initiates.
  • the entire output power ie the sum of the human drive power and the electromotive drive power, is transmitted via an intermediate output element 48 which is non-rotatably connected to the output shaft 52 and an output element attached thereto (Not shown), for example a chain ring, transmitted to the rear wheel of the electric bicycle via a chain or a belt.
  • An electric bicycle bicycle frame 12 is shown incomplete in each of the figures, with a base body 112; 212 of a center motor mounting arrangement 20; 220 rigidly connecting two rear wheel stays 12'", a seat tube 12" and a down tube 12'.
  • the receiving base body 112; 212 and the other parts of the bicycle frame 12 are made of metal, for example aluminum, but can also be made of steel or a fiber-reinforced plastic.
  • the central motor drive unit 40 has a drive housing 46 composed of two housing shells 461, 462, in which the bottom bracket shaft 50, which penetrates the drive housing 46 in the transverse direction, and the output shaft 52, which is arranged coaxially and parallel thereto, are rotatably mounted with respect to one another and rotatably with respect to the drive housing 46.
  • the bottom bracket shaft 50 and the output shaft 52 arranged coaxially thereto rotate about the bottom bracket axle 50'.
  • a form-fitting structure 501, 502 is provided on each of the two longitudinal ends of the bottom bracket shaft 50, on which a pedal crank can be fixed in a torque-proof manner.
  • the drive housing 46 Also housed in the drive housing 46 is an electric drive motor 110 and a gear, not shown in the figures.
  • the bottom bracket shaft 50 and the output shaft 52 emerge from the drive housing 46 on the lateral sides of the drive housing 46 through a respective housing opening.
  • the drive housing 46 viewed in the longitudinal direction of the drive housing, is functionally divided into a bottom bracket part 42 and a motor part 44 divided up.
  • the bottom bracket part 42 of the drive housing 46 has the bottom bracket shaft 50 and the output shaft 52 , whereas the electric drive motor 110 is accommodated in the motor part 44 .
  • the drive motor 110 is partially housed by a hollow-cylindrical motor pot 74 of the drive housing 46, the lateral of the right
  • the drive unit 40 has an annular radial clamping ring 621, 622 on both lateral sides, which is arranged coaxially to the bottom bracket axle 50', and which has a circular cylindrical outer clamping surface 64 in each case, which is formed by a correspondingly shaped opening flange of the drive housing 46.
  • Both lateral sides of the fastening arrangement 60; 260 are essentially mirror-symmetrical to the vertical longitudinal plane, as can be seen in FIGS.
  • the drive unit 40 is identical in both exemplary embodiments described.
  • the receiving arrangement 20 has two frame-side side walls 514, 516, each standing essentially in a vertical plane, which are separate from the bicycle frame 12 or from the receiving
  • Base body 112 are formed, and by bolt-like
  • Fastening elements 550,552 are fastened to the bicycle frame or the receiving base body 112.
  • the two side walls 514,516 are each formed as clamping plates, each one
  • Inner clamping surface 32 is interrupted in the circumferential direction by a separating slot 530 which is bridged by a tangential tension element 540 .
  • the tangential tension element 540 is formed by a linear threaded tension bolt 542 which, with its external thread 544 in a corresponding side wall internal thread 546 is screwed in above the separating slot 530 and which is inserted with its adjoining section in a side wall cylinder bore 548 of the side wall 514 , 516 below the separating slot 530 .
  • a threaded nut 549 is screwed onto the distal end of the tie bolt and tightened with a high torque, so that the inner clamping surface 32 is contracted tangentially or in the circumferential direction and is narrowed radially at the same time.
  • a closed and hollow-cylindrical plastic separating ring 300 is arranged between the outer clamping surface 64 of the drive unit 40 and the corresponding inner clamping surface 32 of the side wall 514, 516 Metal sidewall 514.516 is excluded.
  • the mid-motor mounting arrangement 220 is essentially composed of a mounting base body 212, which connects the down tube 12', the seat tube 12" and the two rear wheel struts 12"' to one another in one piece, and two side walls 214,216 formed, which are on both lateral sides of the receiving arrangement 220 substantially in a vertical longitudinal plane.
  • Each side wall 214, 216 forms an approximately half-shell inner clamping surface 232, which in the present case extends over a clamping surface angle K of approximately 160°.
  • both of the side wall 214.216 formed respective inner clamping surface 231 and the corresponding outer clamping surface 64 of the drive unit 40 each cylindrical.
  • the receiving base body 212 and the two side walls 214, 216 together form a monolithic one-piece metal receiving body 210.
  • the tangential tension element 240 is formed by a U-shaped tension bracket 242, the two linear bracket ends 244,245 of which are anchored in the side wall 214,216 Inner clamping surface 230.
  • the two linear bracket sections 235 of the tension bracket 242 are designed to be fully cylindrical and are inserted in corresponding cylinder bores 237 in the respective side wall 214, 216, with the two continuous cylinder bores 237 being arranged parallel to one another.
  • the two bracket ends 244,245 are each provided with an external thread 247 onto which a threaded nut 249 is screwed, by which the respective bracket end 244,245 is supported or anchored on a corresponding annular flange 270.
  • the part of the respective side wall 214, 216 forming the inner clamping surface 32 and the respective tangential tension element 240 together form a clamping ring arrangement 200.
  • the two clamping ring arrangements 200 together form a central motor mounting arrangement 220.
  • the central motor mounting arrangement 220 together with the drive unit 40 forms a Electric bike mid-motor mounting assembly 260.

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

Abstract

L'invention concerne un ensemble de fixation de moteur central de vélo électrique (60), comprenant un cadre de vélo (12) avec un ensemble de réception de moteur central côté cadre (20) et une unité d'entraînement de moteur central de vélo électrique (40) qui est installée dans l'ensemble de réception. L'unité d'entraînement (40) comprend : un boîtier d'entraînement (46), un arbre de pédalier (50) qui traverse le boîtier d'entraînement (46) dans la direction transversale, un arbre de sortie (52) qui est parallèle à l'arbre de pédalier, et un anneau de serrage radial en forme d'anneau sensiblement circulaire (621, 622) qui est apparié au boîtier d'entraînement (46) sur au moins un côté latéral de l'unité d'entraînement (40) et coaxialement à l'axe de pédalier (50'), l'anneau de serrage radial (621, 622) présentant une surface de serrage externe circulaire (64), et l'ensemble de réception (20) comprenant : un ensemble anneau de serrage (500) qui est fixé au cadre de vélo (12) sur au moins un côté latéral et qui comprend une paroi latérale côté cadre (512, 514) se dressant sensiblement sur un plan vertical et ayant une surface de serrage interne (32), dans laquelle la surface de serrage externe correspondante (64) de l'anneau de serrage radial côté entraînement (621, 622) repose de manière serrée, et au moins un élément de traction tangentiel (540), au moyen duquel la surface de serrage externe (64) de l'unité d'entraînement (40) est poussée radialement dans la surface de serrage interne (32) de la paroi latérale (514, 516).
PCT/EP2021/065269 2021-06-08 2021-06-08 Ensemble de fixation de moteur central de vélo électrique WO2022258145A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PCT/EP2021/065269 WO2022258145A1 (fr) 2021-06-08 2021-06-08 Ensemble de fixation de moteur central de vélo électrique
DE112021007777.5T DE112021007777A5 (de) 2021-06-08 2021-06-08 Elektrofahrrad-Mittelmotor-Befestigungsanordnung

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2021/065269 WO2022258145A1 (fr) 2021-06-08 2021-06-08 Ensemble de fixation de moteur central de vélo électrique

Publications (1)

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WO2022258145A1 true WO2022258145A1 (fr) 2022-12-15

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ID=76444382

Family Applications (1)

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PCT/EP2021/065269 WO2022258145A1 (fr) 2021-06-08 2021-06-08 Ensemble de fixation de moteur central de vélo électrique

Country Status (2)

Country Link
DE (1) DE112021007777A5 (fr)
WO (1) WO2022258145A1 (fr)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015015014A1 (fr) 2013-08-02 2015-02-05 Ego Sports Gmbh Système de montage pour attacher un système d'entraînement électrique à une bicyclette
CN104773254A (zh) 2014-01-09 2015-07-15 刘俊祥 电动自行车的驱动总成
CN104787224A (zh) 2015-05-05 2015-07-22 苏州捷诚科技有限公司 一种中置电机系统与吊架的装配结构
DE102016115681A1 (de) 2015-08-31 2017-03-02 Shimano Inc. Fahrradschutzvorrichtung und damit ausgestattete Antriebseinheit
CN207450132U (zh) * 2017-11-17 2018-06-05 邵阳轻乐智能科技有限公司 电助力自行车车架及电助力自行车
US10137954B2 (en) * 2015-04-14 2018-11-27 Spir Bikes, Llc Integrated electric bicycle drive system
DE102019210720A1 (de) * 2019-07-19 2021-01-21 Continental Bicycle Systems Gmbh & Co. Kg Verbindungssystem einer Antriebseinheit mit einem Fahrradrahmen

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015015014A1 (fr) 2013-08-02 2015-02-05 Ego Sports Gmbh Système de montage pour attacher un système d'entraînement électrique à une bicyclette
CN104773254A (zh) 2014-01-09 2015-07-15 刘俊祥 电动自行车的驱动总成
US10137954B2 (en) * 2015-04-14 2018-11-27 Spir Bikes, Llc Integrated electric bicycle drive system
CN104787224A (zh) 2015-05-05 2015-07-22 苏州捷诚科技有限公司 一种中置电机系统与吊架的装配结构
DE102016115681A1 (de) 2015-08-31 2017-03-02 Shimano Inc. Fahrradschutzvorrichtung und damit ausgestattete Antriebseinheit
CN207450132U (zh) * 2017-11-17 2018-06-05 邵阳轻乐智能科技有限公司 电助力自行车车架及电助力自行车
DE102019210720A1 (de) * 2019-07-19 2021-01-21 Continental Bicycle Systems Gmbh & Co. Kg Verbindungssystem einer Antriebseinheit mit einem Fahrradrahmen

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Publication number Publication date
DE112021007777A5 (de) 2024-03-14

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