WO2010031368A1 - Umschaltbare freilaufanordnung für ein getriebe, insbesondere für ein kurbel-cvt eines kraftfahrzeuges - Google Patents
Umschaltbare freilaufanordnung für ein getriebe, insbesondere für ein kurbel-cvt eines kraftfahrzeuges Download PDFInfo
- Publication number
- WO2010031368A1 WO2010031368A1 PCT/DE2009/001125 DE2009001125W WO2010031368A1 WO 2010031368 A1 WO2010031368 A1 WO 2010031368A1 DE 2009001125 W DE2009001125 W DE 2009001125W WO 2010031368 A1 WO2010031368 A1 WO 2010031368A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- clamping body
- arrangement according
- leg
- clamping
- spring
- Prior art date
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
- F16D41/08—Freewheels or freewheel clutches with intermediate wedging coupling members between an inner and an outer surface with provision for altering the freewheeling action
- F16D41/084—Freewheels or freewheel clutches with intermediate wedging coupling members between an inner and an outer surface with provision for altering the freewheeling action the intermediate coupling members wedging by pivoting or rocking
-
- 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
- F16D2041/0603—Sprag details
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T74/00—Machine element or mechanism
- Y10T74/19—Gearing
- Y10T74/19219—Interchangeably locked
- Y10T74/19251—Control mechanism
Definitions
- the present invention relates to a freewheel assembly for a transmission, in particular for a crank CVT of a motor vehicle.
- a continuously variable transmission which comprises a drive shaft and an output shaft, which are aligned parallel to each other in a rotatable gear housing mounted.
- the two shafts are connected to each other via an eccentric of the drive shaft and arranged on the output shaft freewheel device and a connecting the eccentric and the freewheel device gleichsein ⁇ chtung.
- the eccentric consists of a plurality of eccentric units, which are arranged axially next to one another on the drive shaft.
- the freewheel device consists of several freewheel units, which are arranged axially adjacent to each other on the output shaft.
- the drive shaft has a guide area offset eccentrically with respect to its axis of rotation, on the lateral surface of which an eccentric component is rotatably mounted.
- On the Exzenterbauteil at least one connecting rod is rotatably arranged in the configuration of the continuously variable transmission as a crank CVT (Continuous Variable Transmission).
- the freewheel units arranged on the output shaft each have clamping bodies which are arranged between an inner ring formed by a region of the output shaft and an outer ring, wherein the surfaces of the outer ring and the inner ring are matched to one another such that the clamping body in a Relativvermosides between inner ring and outer ring this Blocking rotation, so that the outer ring and the inner ring are twisted together.
- the clamping body In the other Relativverformatides between the outer ring and the inner ring no blocking effect is effected by the clamping body.
- the individual clamping body are acted upon in the reverse direction, which can be done by at least one spring element.
- the individual clamping bodies are positioned relative to each other via at least one cage in the circumferential direction.
- a switching device which serves to switch the blocking function of the freewheel.
- This switching device comprises a plurality of switching units, which are each arranged between adjacent clamping bodies.
- the switching units are synchronously actuated and have switching means, each having a rotatable disk-shaped area and a, preferably made of a profiled bar, profiled area.
- switching means each having a rotatable disk-shaped area and a, preferably made of a profiled bar, profiled area.
- a leg spring is provided, which is clamped between the profiled area and a clamping body.
- the leg spring has a leg which can act on a clamping body in the corresponding locking direction.
- the leg spring and the profiled regions are arranged eccentrically with respect to the axis of rotation of the disk-shaped region, so that upon rotation of the disk-shaped region a circumferential displacement of the leg spring and the profiled regions takes place.
- the tension direction or the direction of force of the leg spring changes. In this way, a Switzerland stipulate the operation of a motor vehicle or a corresponding for a reverse drive of the motor vehicle relative position can be adjusted.
- the object of the present invention is to design a switchable freewheel device such that, with a good function, an extremely space-saving sprag arrangement is made possible.
- a switchable freewheel device for a transmission in particular for a crank CVT of a motor vehicle, are arranged in which held between an outer ring and an inner ring in a cage clamp body, wherein in each case a clamping body by an energy storage against the inner ring with a relative large pressing force can be pressed and wherein the clamping body can be set by a switching mechanism in the release direction or in the clamping direction.
- the energy storage device is dimensioned so that it generates a relatively small contact force for setting up the clamping body at a relatively large contact pressure.
- the energy accumulator associated with a clamping body each has two leg springs arranged on the clamp body, each of which generates an erection force via a relatively large lever arm, but the torques generated by the erection force of the leg springs act in opposite directions, so that the resulting torque difference for setting up the clamping body is advantageously relatively small.
- the body of a leg spring is arranged in each recess.
- the leg portions of a leg spring each extend at one or the other end of the body of the leg spring approximately perpendicular to the central axis to opposite sides of the leg spring.
- Each angled end portion of the leg spring is arranged in a circumferentially extending slot of a wall portion of the clamp body holding cage.
- the end portions of the radial outer leg springs are used in spaced apart in the circumferential direction of the wall parts, radially outer slots.
- the end regions of the radially inner leg springs are inserted into radially inner slots of the wall parts which are spaced apart from each other in the circumferential direction.
- the cylindrical recesses expediently have the approximately circular cylindrical bodies of the leg springs retaining undercuts.
- These undercuts are structurally particularly simple and effective in that the recesses are formed in a part-cylindrical manner and extend over an angular range which is greater than 180 °.
- the bodies of the torsion springs are preferably tightly wound.
- the cylindrical clamping bodies have a cross section with a larger diameter and a smaller diameter, wherein the recesses lie approximately in the direction of the smaller diameter.
- the clamping bodies have an oval or elliptical cross section. Since the recesses are arranged in those areas of the clamping body that do not come into contact with the inner or outer ring during their function, the contact geometry of the clamping body arrangement is not disturbed in an advantageous manner.
- the cage may have stops for the clamping body in the clamping or release position, the structurally simple the shape of perpendicular to a wall portion of the cage - A - may have, radially inwardly extending, spaced apart in the circumferential direction stop members.
- the energy storage in the form of an annular groove spring which engages in Worm spring grooves of the clamping body, wherein the Worm spring grooves are designed so that the worm spring on the one hand generates the relatively large contact force between the inner ring and the clamping bodies.
- the specially trained bottom of the worm feather groove is such that the contact force for the erection moment is generated by a small lever arm by the rolling of the worm spring in the worm spring groove.
- the bottom of the groove preferably corresponds approximately to a circular arc.
- the worm spring can preferably be designed so strong that the resulting contact force between the clamping body and the inner ring and the resulting frictional force during slipping of the clamping body is large enough to ensure the damping function. Since the worm spring is guided in the specially designed worm spring groove of the clamp body and the lever arm of the worm spring force and the worm spring radius always remain constant because of the special design of the groove, the scattering of the Anfederungskraft the clamp body can be kept small in an advantageous manner. Because of the achievable with a worm spring simple structure of the present freewheel assembly, a significant cost reduction can be achieved. The worm spring advantageously has a longer life, because it snuggles well into the Klemm emotionsnut.
- Figure 1 shows a clamp body with two torsion springs
- Figure 2 is a perspective view seen from the side arranged in a cage of a freewheel assembly according to a first embodiment of the present invention leg spring, wherein for better visibility of the associated clamping body is not shown;
- Figure 3 shows the arrangement of Figure 2, wherein a clamping body is shown
- Figure 4 is a representation for explaining the balance of power
- Figure 5 shows a development of the present invention.
- the following considerations led to the invention. If you press the clamp body to produce a relatively high friction between the sprags and the inner ring of the freewheel assembly by a strong spring force strong against the inner ring, you have to ensure that the force to set up the clamp body in the release or clamping direction is relatively small. This can be achieved by either two leg springs are used in a large lever arm for generating the erection force whose torques act in different directions, the torque difference, which is relevant for setting up the clamping body is relatively small. However, the frictional forces generated by the two torsion springs add up.
- the torque can be generated by a very small lever arm, which is kept constant over the entire clamping process. This can be ensured by a special groove for guiding the worm spring.
- a clamping body 1 known per se which is for example oval or elliptical, has a larger diameter 2 and a smaller diameter 3 in cross-section.
- the central axis of the cylindrical clamping body 1 is denoted by 4.
- the clamping body 1 with respect to the central axis 4 opposite two cylindrical recesses 5, 6, which extend parallel to the central axis 4.
- a leg spring 8 is inserted in the recess 5, which has an undercut 7, a leg spring 8 is inserted. More specifically, the recess 5 extends over an angular range which is greater than 180 °, so that the undercut 7 is formed for the body of the leg spring 8.
- the leg springs 8, 9 each comprise a helically wound body, at the ends of leg portions are attached, which extend at 90 ° to the direction of the spring body.
- the leg spring 8 has in the from the figures 1 and Fig. 2 shows a leg part 13 which is fixed with a bent end portion 14 in a circumferentially extending slot 15 of the wall portion 11 of the cage and a leg portion 16, with its bent end portion 17 in a circumferential direction of the wall portion 12 of the cage extending slot 18 is inserted.
- the leg spring 9 comprises a leg portion 20, whose end portion 19 is inserted into a slot 21, which is located radially inside it elongated hole 15 in the wall portion 11.
- the end region 26 of the other leg part 22 of the leg spring 9 is inserted into a slot 23 extending in the circumferential direction of the wall part 12, which slot is located radially inside the wall part 12.
- FIG. 3 shows the arrangement of FIG. 2, but with the clamping body 1 assigned to the leg springs 8 and 9 shown.
- the clamping body 1 has along its central axis 4 extending, projecting on both sides pin parts 24 which are mounted in corresponding recesses 25 of the wall parts 11 and 12.
- leg spring 8 exerts a force acting in the direction of the arrow 27 in the direction of the inner ring 31 due to their applied by the anchoring of their leg portions 13, 16 bias.
- leg spring 9 generates a contact force 27 in the direction of the inner ring 31 due to its anchoring of the leg parts 20, 22 in the wall parts 11, 12 of the cage (arrow 29). It can be seen that the applied in the direction of arrows 27 and 29 contact forces of the leg springs 8 and 9 add, so that a high frictional force is generated for the damping of the freewheel assembly.
- the resulting from the generated erection direction of rotation of the clamp body 1 is designated in the figure 4 with 30.
- the frictional force for damping is generated by a worm spring known per se, which engages in a worm-spring groove 41 of a clamping body 42, as indicated schematically by the line 40 ,
- the clamping body 42 is pressed against the inner ring 43.
- the worm spring 40 is designed so strong that the resulting contact force between the inner ring 43 and the clamping body 42 and thereby when sliding the frictional force are large enough to ensure the damping function. Since this contact force for the springing of the clamping body 42 is much too large, a reduction of the lever arm for the erection moment is achieved by inserting the worm spring 40 in a specially designed worm spring groove 41.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Springs (AREA)
- Gear-Shifting Mechanisms (AREA)
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2011527201A JP5528456B2 (ja) | 2008-09-19 | 2009-08-10 | 伝動装置、特に自動車のクランクcvtのための切換可能なフリーホイール |
CN200980136840.8A CN102171480B (zh) | 2008-09-19 | 2009-08-10 | 用于变速器、尤其是用于机动车的曲柄式cvt的可转换的空转装置 |
DE112009002261T DE112009002261A5 (de) | 2008-09-19 | 2009-08-10 | Umschaltbare Freilaufanordnung für ein Getriebe, Insbesondere für ein Kurbel-CVT eines Kraftfahrzeuges |
US13/065,335 US8839688B2 (en) | 2008-09-19 | 2011-03-19 | Switchable free-wheel arrangement for a transmission, particularly for a crank-CVT of a motor vehicle |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102008048027.4 | 2008-09-19 | ||
DE102008048027 | 2008-09-19 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2010031368A1 true WO2010031368A1 (de) | 2010-03-25 |
Family
ID=41467070
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/DE2009/001125 WO2010031368A1 (de) | 2008-09-19 | 2009-08-10 | Umschaltbare freilaufanordnung für ein getriebe, insbesondere für ein kurbel-cvt eines kraftfahrzeuges |
Country Status (5)
Country | Link |
---|---|
US (1) | US8839688B2 (de) |
JP (1) | JP5528456B2 (de) |
CN (1) | CN102171480B (de) |
DE (2) | DE102009036880A1 (de) |
WO (1) | WO2010031368A1 (de) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102012221026A1 (de) | 2011-12-12 | 2013-06-13 | Schaeffler Technologies AG & Co. KG | Freilaufeinrichtung |
DE102012221028A1 (de) | 2011-12-12 | 2013-06-13 | Schaeffler Technologies AG & Co. KG | Freilaufaußenring |
DE102012221136A1 (de) | 2011-12-12 | 2013-06-13 | Schaeffler Technologies AG & Co. KG | Freilauf, insbesondere für ein Kurbel-CVT-Getriebe |
DE102012221038A1 (de) | 2011-12-12 | 2013-06-13 | Schaeffler Technologies AG & Co. KG | Freilaufeinrichtung |
DE102012221022A1 (de) | 2011-12-12 | 2013-06-13 | Schaeffler Technologies AG & Co. KG | Freilaufeinrichtung |
JP6079762B2 (ja) * | 2014-12-09 | 2017-02-15 | トヨタ自動車株式会社 | セレクタブルワンウェイクラッチ |
DE102019115520A1 (de) * | 2019-06-07 | 2020-12-10 | Bayerische Motoren Werke Aktiengesellschaft | Verfahren zum Montieren eines Energiespeichers an einem Aufbau eines Fahrzeugs sowie Fahrzeug |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
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FR2178664A5 (de) * | 1972-03-27 | 1973-11-09 | Borg Warner Stieber Gmbh | |
WO1993014328A1 (de) * | 1992-01-20 | 1993-07-22 | Steyer-Daimler-Puch Aktiengesellschaft | Kupplung für beide drehrichtungen mit selektiver freilaufwirkung |
US5343992A (en) * | 1990-02-08 | 1994-09-06 | Ina Walalager Schaeffler Kg | Switchable freewheel with locking elements |
JPH06280898A (ja) * | 1993-03-25 | 1994-10-07 | Aichi Mach Ind Co Ltd | 2方向差動クラッチ |
DE10008278A1 (de) * | 1999-02-24 | 2000-09-14 | Ntn Toyo Bearing Co Ltd | Vorrichtung zur Leistungsübertragung/-unterbrechung |
WO2004111483A1 (de) * | 2003-06-17 | 2004-12-23 | Ina-Schaeffler Kg | Klemmkörperfreilaufeinrichtung zum kuppeln in beide drehrichtungen |
US20070102255A1 (en) * | 2002-01-16 | 2007-05-10 | Gauthier Michael T | Ratcheting mechanism |
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DE1904785C3 (de) * | 1969-01-31 | 1974-12-19 | Georg Mueller Kugellagerfabrik Kg, 8500 Nuernberg | Klemmkörper |
DE3229685C1 (de) * | 1982-08-10 | 1983-11-03 | Ringspann Albrecht Maurer Kg, 6380 Bad Homburg | Klemmkoerper-Kaefigring fuer Freilaufkupplungen |
FR2610378B1 (fr) * | 1987-01-29 | 1989-08-18 | Skf France | Dispositif de roue libre a cames de coincement |
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WO2003027538A1 (de) | 2001-09-26 | 2003-04-03 | Luk Lamellen Und Kupplungsbau Beteiligungs Kg | Getriebe |
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DE102004040810A1 (de) * | 2004-08-24 | 2006-03-02 | Ina-Schaeffler Kg | Vorrichtung zur Dämpfung von Drehschwingungen |
US7165352B2 (en) * | 2004-11-18 | 2007-01-23 | Langlotz Bennet K | Rifle with trigger pull weight adjustment |
GB0504628D0 (en) * | 2005-03-05 | 2005-04-13 | Zeroshift Ltd | Transmission layout |
DE102005046896A1 (de) * | 2005-09-30 | 2007-04-05 | Schaeffler Kg | Freilaufkupplung |
DE102005047020A1 (de) * | 2005-09-30 | 2007-04-05 | Schaeffler Kg | Freilaufkupplung |
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JP5705117B2 (ja) * | 2008-10-02 | 2015-04-22 | シェフラー テクノロジーズ アクチエンゲゼルシャフト ウント コンパニー コマンディートゲゼルシャフトSchaeffler Technologies AG & Co. KG | クランク・cvt・伝動装置 |
WO2010051785A1 (de) * | 2008-11-10 | 2010-05-14 | Luk Lamellen Und Kupplungsbau Beteiligungs Kg Attn. Overdiek, Gerhard | Klemmkörperfreilauf |
DE102009030614B4 (de) * | 2009-06-25 | 2011-05-05 | Ringspann Gmbh | Freilauf-Käfigring mit Fliehkraftabhebung |
-
2009
- 2009-08-10 DE DE102009036880A patent/DE102009036880A1/de not_active Withdrawn
- 2009-08-10 JP JP2011527201A patent/JP5528456B2/ja not_active Expired - Fee Related
- 2009-08-10 WO PCT/DE2009/001125 patent/WO2010031368A1/de active Application Filing
- 2009-08-10 CN CN200980136840.8A patent/CN102171480B/zh not_active Expired - Fee Related
- 2009-08-10 DE DE112009002261T patent/DE112009002261A5/de not_active Withdrawn
-
2011
- 2011-03-19 US US13/065,335 patent/US8839688B2/en not_active Expired - Fee Related
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2178664A5 (de) * | 1972-03-27 | 1973-11-09 | Borg Warner Stieber Gmbh | |
US5343992A (en) * | 1990-02-08 | 1994-09-06 | Ina Walalager Schaeffler Kg | Switchable freewheel with locking elements |
WO1993014328A1 (de) * | 1992-01-20 | 1993-07-22 | Steyer-Daimler-Puch Aktiengesellschaft | Kupplung für beide drehrichtungen mit selektiver freilaufwirkung |
JPH06280898A (ja) * | 1993-03-25 | 1994-10-07 | Aichi Mach Ind Co Ltd | 2方向差動クラッチ |
DE10008278A1 (de) * | 1999-02-24 | 2000-09-14 | Ntn Toyo Bearing Co Ltd | Vorrichtung zur Leistungsübertragung/-unterbrechung |
US20070102255A1 (en) * | 2002-01-16 | 2007-05-10 | Gauthier Michael T | Ratcheting mechanism |
WO2004111483A1 (de) * | 2003-06-17 | 2004-12-23 | Ina-Schaeffler Kg | Klemmkörperfreilaufeinrichtung zum kuppeln in beide drehrichtungen |
Also Published As
Publication number | Publication date |
---|---|
JP5528456B2 (ja) | 2014-06-25 |
DE102009036880A1 (de) | 2010-04-01 |
DE112009002261A5 (de) | 2011-07-28 |
JP2012503151A (ja) | 2012-02-02 |
US20110263375A1 (en) | 2011-10-27 |
CN102171480A (zh) | 2011-08-31 |
US8839688B2 (en) | 2014-09-23 |
CN102171480B (zh) | 2015-03-11 |
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