WO2012072280A1 - Roue libre et dispositif de démarrage pour un moteur a combustion interne équipé de cette dernière - Google Patents

Roue libre et dispositif de démarrage pour un moteur a combustion interne équipé de cette dernière Download PDF

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Publication number
WO2012072280A1
WO2012072280A1 PCT/EP2011/062773 EP2011062773W WO2012072280A1 WO 2012072280 A1 WO2012072280 A1 WO 2012072280A1 EP 2011062773 W EP2011062773 W EP 2011062773W WO 2012072280 A1 WO2012072280 A1 WO 2012072280A1
Authority
WO
WIPO (PCT)
Prior art keywords
locking members
inner part
outer ring
freewheel
starting device
Prior art date
Application number
PCT/EP2011/062773
Other languages
German (de)
English (en)
Inventor
Matthias Sperber
Original Assignee
Schaeffler Technologies AG & Co. KG
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 Schaeffler Technologies AG & Co. KG filed Critical Schaeffler Technologies AG & Co. KG
Priority to CN201180057761.5A priority Critical patent/CN103238004B/zh
Publication of WO2012072280A1 publication Critical patent/WO2012072280A1/fr

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D41/00—Freewheels or freewheel clutches
    • F16D41/06—Freewheels or freewheel clutches with intermediate wedging coupling members between an inner and an outer surface
    • F16D41/064—Freewheels or freewheel clutches with intermediate wedging coupling members between an inner and an outer surface the intermediate members wedging by rolling and having a circular cross-section, e.g. balls
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D41/00—Freewheels or freewheel clutches
    • F16D41/06—Freewheels or freewheel clutches with intermediate wedging coupling members between an inner and an outer surface
    • F16D41/064—Freewheels or freewheel clutches with intermediate wedging coupling members between an inner and an outer surface the intermediate members wedging by rolling and having a circular cross-section, e.g. balls
    • F16D2041/0646—Freewheels or freewheel clutches with intermediate wedging coupling members between an inner and an outer surface the intermediate members wedging by rolling and having a circular cross-section, e.g. balls the intermediate coupling members moving between recesses in an inner race and recesses in an outer race

Definitions

  • the invention relates to a freewheel and a starting device for an internal combustion engine with a rotationally driven by external force about a rotation axis inner ring, standing in operative connection with a crankshaft of the internal combustion engine outer ring and between the inner ring and outer ring freewheeling, distributed over the circumference locking members.
  • sprag clutches have an outer ring and an inner part - a shaft or an inner ring - and arranged therebetween locking members in the form of clamping bodies and have long been known.
  • DE 2008 071 681 A1 discloses a freewheel in the form of an overrunning clutch, in which locking members designed as clamping rollers clamp on a ramp by a relative rotation of the outer ring and shaft in a first direction of rotation and thus allow torque transmission between shaft and outer ring. while at a relative rotation in the opposite direction of rotation, the clamping is canceled and a torque transmission does not occur.
  • pawl freewheels as they are known from DE 40 26 213 A1, are available in which the outer circumference of the inner part has a ramp contour against which limited fixed position rotatably arranged on the outer ring latches are elastically braced, so that at a Rotation of the outer ring against the ramps a positive connection between the outer ring on the pawls and the ramps is made to the inner part and comparatively high torques can be transmitted.
  • a disadvantage is the constant radial bias of the pawls relative to the inner part, which leads in particular in starting devices to an intolerable, permanent noise pollution and wear during operation of the internal combustion engine.
  • the object of the invention is therefore the development of freewheels and starting Devices for internal combustion engines in particular against the background of a cost-effective and space-saving improvement of this with high torque performance.
  • the embodiment of the freewheel is carried out according to the invention by means of limited shiftable locking members, which take the place of frictional clamping bodies and due to the outer contour of this fitted, complementary to this formed outer contour of the inner part, which may be a shaft or an inner ring, a Form positive fit as soon as they accumulate on the outer ring, for example, at this intended ramps. Due to the less tolerance-sensitive design of the positive connection with respect to terminal contacts, the production of the freewheel is cheaper. Furthermore, higher torques can be transmitted from the inner part to the outer ring and vice versa in the blocking state of the freewheel via the positive connection with the same space stress and substantially the same training, for example, the same number and size of the clamping bodies corresponding locking members.
  • a freewheel and a starting device can be formed advantageously in such a way that the inner ring has an outer circumference with a plurality of circumferentially distributed, a partial arc of the locking members complementary imaging recesses and the locking members in each case a recess of the outer ring with a in a ramp provided ramp are included.
  • the recesses in the circumferential direction adjacent to the ramps can have radial extensions for adjusting the rest position of the locking members.
  • the locking members run at a locking state adjusting rotational direction of the inner part and outer ring on the ramps and latch at the same time in one of the recesses form fit.
  • the locking members are relieved and moved by the displacement force in its rest position.
  • the displacement force can be effected by a variety of structural facilities and physical effects.
  • the displacement force can be provided by friction.
  • a frictional engagement is generated between the input part or a rotatably associated with this component and the locking members, which causes a shift of the locking members from the ramp to the rest position and back with a change in the sense of rotation between the inner part and outer ring due to the friction force underlying the friction engagement, causing the Locking members for adjusting the locking and freewheeling position are controlled accordingly.
  • the inner part of two friction plates may be flanked rotationally, of which the force acting on the locking members frictional force is exerted.
  • each plastic rings for example, O-rings are inserted, each of which is in abutting contact with an end face of the locking members.
  • friction elements made of other materials such as steel may be provided.
  • spring elements for example a plate spring, can be clamped between the blocking elements and an input-side component.
  • friction elements can also be provided on the end faces of the locking members.
  • the starting device or the environment of the freewheel can be operated wet in a lubricating medium and the frictional force can be applied by means of the lubricating medium.
  • the adhesion forces and the viscosity of commonly used lubricant such as oil or transmission fluid is already sufficient to between usually used gap widths of fractions of millimeters to a few millimeters between components of the input part and the locking members in alternating rotational direction between To be able to control rest position and contact with the ramps.
  • the locking members are held by means of a spring element in a locking position forming the positive locking and the displacement force is applied by the centrifugal force.
  • each individual locking member can be held in the locking position on the ramps and in positive engagement with the inner part of a single or acting on several or all locking members spring elements.
  • each individual locking member can be held in the locking position on the ramps and in positive engagement with the inner part of a single or acting on several or all locking members spring elements.
  • spring elements for example, in a starting device with increasing acceleration of the outer ring when the internal combustion engine starts the centrifugal force on the locking members so that they overcome the spring force of the spring elements and displaced in the opposite to the ramps radially enlarged recesses in the outer ring. In these take the Locking members relative to the inner part a contactless rest position. If the internal combustion engine is turned off, the locking members, supported by the spring accumulators, shift back into the blocking position, forming the positive connection with the outer profile of the inner part.
  • the locking members may be held by means of a magnetic body in a form-locking position.
  • the blocking bodies are formed soft magnetic, which in each case held by means of a magnetic force of a magnetically hard magnetic body, which is adjacent to the locking members in the locked position, held in the locked position.
  • the locking members may be formed hard magnetically, wherein only a soft magnetic component is disposed on the ramps and the other components in the vicinity of the locking members have a low Magnetis sability, for example, are made of non-magnetic steel.
  • the displacement force for displacement of the locking members in the rest position is applied in accordance with the use of spring elements by the centrifugal force.
  • the object is achieved by a freewheel with an inner ring and an outer ring and arranged between these, distributed over the circumference locking members, wherein the locking members relative to the outer ring radially and circumferentially limited are arranged displaceably in the blocking state of the freewheel by means of the locking members a positive connection between the outer ring and inner ring is formed and in the non-locking state of the freewheel locking members are displaced by means of an effective between inner ring and locking members displacement force in a radial play afflicted to the inner ring rest position.
  • Figure 1 is a view of a starting device in the locked state
  • FIG. 2 shows a section through the starting device of FIG. 1 in the locked state
  • Figure 3 is a view of the starting device of Figure 1 in overtaking
  • Figure 4 shows a section through the starting device of the figure in overtaking.
  • Figures 1 to 4 show the starting device 1 with the freewheel 2 respectively in view ( Figures 1 and 3) and in section ( Figures 2 and 4) and in lock mode ( Figures 1 and 2) and in the rollover mode ( Figures 3 and 4).
  • the starting device 1 contains the outer ring 3, which is directly, for example by means of a toothing with the crankshaft or the flywheel of the internal combustion engine, or indirectly, for example via an auxiliary unit such as a generator connected to the effective crankshaft. Corresponding mechanical connection devices on the outer ring 3 are not shown.
  • the inner part 4 Radial inside the outer ring 3, the inner part 4 is arranged, which is rotationally driven at the start of the preferably arranged in a two-wheeled internal combustion engine by a foreign force such as electric motor or Kickstarter.
  • the inner part 4 is flanked by the two friction disks 5, 6, to which the external force, for example a rotor, not shown, of an electric motor can be flanged and fixedly connected thereto by means of the screw connection 7.
  • the friction plates 5, 6 (in the figures 1, 3 omitted for clarity) cover the outer ring 3 at least partially and form a captive for the locking members 8, distributed over the circumference in the recesses 9 of the outer ring 3 in the circumferential direction and radially limited displacement are included.
  • the - here in the number three - accommodated in the recesses 9 locking members 8 are formed as cylindrical rollers with a circular circumference.
  • This in the recesses 9 is limited in each case in a circumferential direction relative to the outer ring by the ramps 10 and in the other circumferential direction by the radially opposite the ramps 10 extended extension 11.
  • the radial expansions 11 form the rest position A (FIG. 3) of the locking members 8 in the rollover mode, while the blocking position B (FIG.
  • the outer profile 12 is formed by the plurality of evenly distributed over the circumference, to the outer periphery of the locking members 8 complementary pitch circles forming recesses 13 into which in a rotation of the inner part 4 relative to the outer ring 3, a respective locking member 8 slides into and forms the positive connection.
  • the locking members 8 are displaced to the radial extensions 11 and form the radial play 14 relative to the outer profile 12, so that neither disturbing noise nor wear on locking members 8 and outer profile 12 occurs.
  • the locking members 8 are controlled to set the locking and rest position by means of a displacement force, which is a frictional force generated by the friction plates 5, 6 in the embodiment shown.
  • a displacement force which is a frictional force generated by the friction plates 5, 6 in the embodiment shown.
  • a displacement force which is a frictional force generated by the friction plates 5, 6 in the embodiment shown.
  • each a locking members 8 facing and with the end faces 16 of this standing in frictional contact plastic ring 15 such as O-ring, quad ring or the like.
  • the plastic ring 15 transmits the rotational movement of the inner partly 4 on the locking members 8, so that they are displaced according to the relative rotational movement of the inner part 4 relative to the outer ring 3 in the recesses 9 in the circumferential direction by acting on the locking members 8 displacement force such as frictional force.
  • the fixation of the locking members 8 to the radial extensions 11 takes place by centrifugal force. Furthermore, by appropriate design of the recesses 9, the displacement of the locking members 8 in the radial extensions and thus in the rest position A by centrifugal force are at least supported.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • One-Way And Automatic Clutches, And Combinations Of Different Clutches (AREA)
  • Mechanical Operated Clutches (AREA)

Abstract

L'invention concerne une roue libre (2) et un dispositif de démarrage pour un moteur à combustion interne comprenant un élément intérieur (4), entraîné en rotation autour d'un axe de rotation par une force extérieure, une bague extérieure (3) reliée fonctionnellement à un vilebrequin du moteur à combustion interne et, entre l'élément intérieur (4) et la bague extérieure (3), répartis sur le pourtour, des éléments de blocage (8) formant une roue libre (2). Pour transmettre des moments supérieurs à l'aide d'une roue libre économique en présence de conditions d'encombrements prédéfinies ou bien pour réduire l'encombrement tout en permettant la transmission d'un moment identique, les éléments de blocage (8) sont disposés radialement par rapport à la bague extérieure (3) et de façon à pouvoir effectuer un déplacement limité dans le sens périphérique; les éléments de blocage (8) permettent de réaliser une liaison par complémentarité de forme entre la bague extérieure (3) et l'élément intérieur (4) lorsque la roue libre (2) est à l'état bloqué; et, lorsque la roue libre (2) n'est pas à l'état bloqué, les éléments de blocage (8) sont déplacés, par une force de déplacement agissant entre l'élément intérieur (4) et les éléments de blocage (8), dans une position de repos (A) pourvue d'un jeu radial (14) par rapport à l'élément intérieur (4).
PCT/EP2011/062773 2010-11-30 2011-07-26 Roue libre et dispositif de démarrage pour un moteur a combustion interne équipé de cette dernière WO2012072280A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201180057761.5A CN103238004B (zh) 2010-11-30 2011-07-26 自由轮和用于具有自由轮的内燃机的起动装置

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102010052921.4 2010-11-30
DE102010052921A DE102010052921A1 (de) 2010-11-30 2010-11-30 Freilauf und Startvorrichtung für einen Verbrennungsmotor mit diesem

Publications (1)

Publication Number Publication Date
WO2012072280A1 true WO2012072280A1 (fr) 2012-06-07

Family

ID=44358081

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2011/062773 WO2012072280A1 (fr) 2010-11-30 2011-07-26 Roue libre et dispositif de démarrage pour un moteur a combustion interne équipé de cette dernière

Country Status (3)

Country Link
CN (1) CN103238004B (fr)
DE (1) DE102010052921A1 (fr)
WO (1) WO2012072280A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013020327B4 (de) 2013-12-05 2022-05-25 Borgwarner Inc. Starterfreilauf und Freilaufanordnung mit einem solchen Starterfreilauf
DE102016201548B4 (de) 2016-02-02 2017-10-19 Schaeffler Technologies AG & Co. KG Freilauf und Startvorrichtung mit dem Freilauf
CN109826880B (zh) * 2019-02-22 2024-05-03 中国科学院声学研究所东海研究站 一种超越离合式自锁-解锁机构
DE102019114455A1 (de) * 2019-05-29 2020-12-03 Seg Automotive Germany Gmbh Freilaufeinrichtung für einen Starter und Starter für eine Brennkraftmaschine

Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR15428E (fr) * 1911-12-30 1912-07-04 Edmond Fillettaz Mécanisme de mise en marche pour moteurs de véhicules automobiles
FR1061396A (fr) * 1952-08-11 1954-04-12 Sarl Hile Perfectionnements aux roues libres
FR1165000A (fr) * 1956-02-27 1958-10-16 Embrayage à roue libre
EP0469598A1 (fr) * 1990-08-03 1992-02-05 Koyo Seiko Co., Ltd. Embrayage à roue libre
DE4026213A1 (de) 1990-08-18 1992-02-20 Walterscheid Gmbh Jean Klinkenfreilauf
EP0791748A1 (fr) * 1996-02-26 1997-08-27 Denso Corporation Anneau élastique pour accouplement à roue libre et démarreur utilisant cet anneau
DE19729620A1 (de) * 1996-07-10 1998-01-15 Denso Corp Untersetzungsvorrichtung mit Freilaufkupplung
US5740694A (en) * 1995-06-01 1998-04-21 Nippondenso Co., Ltd. Starter with planetary reduction gear mechanism
EP1469196A1 (fr) * 2003-04-16 2004-10-20 Ntn Corporation Poulie pour un démarreur avec embrayage solidaire
JP2007040376A (ja) * 2005-08-02 2007-02-15 Nsk Ltd 一方向クラッチおよび一方向クラッチ内蔵型プーリ装置
DE102008017681A1 (de) 2008-04-08 2009-10-15 Schaeffler Kg Freilaufkupplung
WO2010067673A1 (fr) * 2008-12-12 2010-06-17 日立オートモティブシステムズ株式会社 Dispositif d’embrayage à roue libre à rouleaux, et démarreur et dispositif de démarrage de moteur utilisant tous les deux celui-ci

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1967004A (zh) * 2005-11-15 2007-05-23 Ntn株式会社 单向离合器组件

Patent Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR15428E (fr) * 1911-12-30 1912-07-04 Edmond Fillettaz Mécanisme de mise en marche pour moteurs de véhicules automobiles
FR1061396A (fr) * 1952-08-11 1954-04-12 Sarl Hile Perfectionnements aux roues libres
FR1165000A (fr) * 1956-02-27 1958-10-16 Embrayage à roue libre
EP0469598A1 (fr) * 1990-08-03 1992-02-05 Koyo Seiko Co., Ltd. Embrayage à roue libre
DE4026213A1 (de) 1990-08-18 1992-02-20 Walterscheid Gmbh Jean Klinkenfreilauf
US5740694A (en) * 1995-06-01 1998-04-21 Nippondenso Co., Ltd. Starter with planetary reduction gear mechanism
EP0791748A1 (fr) * 1996-02-26 1997-08-27 Denso Corporation Anneau élastique pour accouplement à roue libre et démarreur utilisant cet anneau
DE19729620A1 (de) * 1996-07-10 1998-01-15 Denso Corp Untersetzungsvorrichtung mit Freilaufkupplung
EP1469196A1 (fr) * 2003-04-16 2004-10-20 Ntn Corporation Poulie pour un démarreur avec embrayage solidaire
JP2007040376A (ja) * 2005-08-02 2007-02-15 Nsk Ltd 一方向クラッチおよび一方向クラッチ内蔵型プーリ装置
DE102008017681A1 (de) 2008-04-08 2009-10-15 Schaeffler Kg Freilaufkupplung
WO2010067673A1 (fr) * 2008-12-12 2010-06-17 日立オートモティブシステムズ株式会社 Dispositif d’embrayage à roue libre à rouleaux, et démarreur et dispositif de démarrage de moteur utilisant tous les deux celui-ci

Also Published As

Publication number Publication date
CN103238004A (zh) 2013-08-07
CN103238004B (zh) 2016-04-20
DE102010052921A1 (de) 2012-06-14

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