WO2010009699A1 - Freilaufeinrichtung mit dämpfung und kurbel-cvt-getriebe mit einer freilaufeinrichtung - Google Patents
Freilaufeinrichtung mit dämpfung und kurbel-cvt-getriebe mit einer freilaufeinrichtung Download PDFInfo
- Publication number
- WO2010009699A1 WO2010009699A1 PCT/DE2009/000940 DE2009000940W WO2010009699A1 WO 2010009699 A1 WO2010009699 A1 WO 2010009699A1 DE 2009000940 W DE2009000940 W DE 2009000940W WO 2010009699 A1 WO2010009699 A1 WO 2010009699A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- damping
- freewheel
- freewheel device
- outer ring
- rolling
- 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
- F16D41/064—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
- F16D41/066—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 all members having the same size and only one of the two surfaces being cylindrical
Definitions
- the invention relates to a freewheel device with a damping, in particular for use in a crank-CVT transmission, and a crank-CVT transmission with such a freewheel device with damping.
- a crank CVT transmission is known for example from EP 1 650 071 A2.
- an eccentric eccentric drive assembly having eccentric members connected to a driven shaft via connecting rod-like connecting members forming an output or output shaft with respect to the gearbox , By transmitting the stroke of the connecting elements by means of freewheel devices on the driven shaft, this is driven, wherein the freewheel devices between the connecting rod-like connecting elements and the driven shaft are provided.
- the driving crankshaft and the output shaft or driven shaft are aligned parallel to one another and in each case rotatably mounted in a transmission housing. Torque is introduced into the crankshaft from an internal combustion engine and transmitted to the output shaft through the crank CVT transmission.
- the eccentricity of the Exzenterbaumaschine and thus the axis of rotation relative to the drive shaft is changed, whereby the transmitted from the connecting rod connecting elements on the output shaft hub and thus the ratio of the transmission can be adjusted.
- the torque can be tapped for example for driving wheels of a vehicle.
- a plurality of eccentric units are arranged behind one another in a crank-CVT transmission in the axial direction of the crankshaft, on each of which connecting rod-like connecting elements are mounted and which are in communication with a corresponding number of free-wheel units on the output side of the transmission.
- the freewheel units can be provided as non-switchable or reversible freewheels.
- a blocking effect is achieved in a relative rotational direction of an outer ring of a freewheel unit and the output shaft or an inner ring fixedly connected thereto, and in the other direction of relative rotation no blocking effect is achieved.
- two blocking positions are provided, in which the two components Block in a first or a second direction of relative rotation and thus are rotated together in the first and second directions of rotation.
- the direction of rotation of the output shaft can be changed, so that, for example, a reverse gear can be realized by means of the umschaitbaren freewheels.
- Such a freewheel device generally has an outer ring, which is provided concentrically around a polygonal-like profile of the output shaft.
- Rolling or clamping body are provided between the polygonal-like profile and the outer ring, which can occupy at least two positions in the circumferential direction with respect to the inner ring, which has the polygonal profile and the outer ring, namely a first position in which they a rotation of the inner ring and of the outer ring to each other, and a second position in which the inner ring and the outer ring relative to each other can be freely rotated (freewheel).
- the first position is also referred to below as the clamping or blocking position.
- a freewheel device described in EP 1 650 071 A2 are for pressing and damping of the rollers on the inner and outer ring V-shaped leaf springs, which are mounted on a pin provided with which the freewheel rollers or clamp body to the inner ring with the polygonal profile or the outer ring are pressed.
- the provision of the V-shaped spring avoids self-motions and vibrations of the idlers, so that the rollers are always ideally pressed against the gap and conditions are avoided in which slip occurs when the rollers do not engage the outer ring.
- the V-shaped leaf spring is supported in each case with its two legs on a roller and thus on two opposite or adjacent rollers. Thus, two force components are exerted on each roller since two adjacent leaf springs act on one roller.
- the resulting force is chosen to be close to the self-locking of the rollers to achieve high frictional force without pinching the roller.
- the contact pressure close to the self-locking limit in the embodiment described in EP 1 650 071 A2 can also be achieved by means of a unilaterally acting spring.
- the invention is based on the idea, in addition to a damping device to provide a separately formed basic biasing device in the damping device, with the rolling body in a first circumferential direction, namely the reverse direction of the freewheel, is biased and direction clamping gap of the freewheel device is pressed.
- the damping device further comprises a damping mechanism formed separately therefrom, which only then acts or amplifies on the rolling bodies when the rolling bodies are moved from the blocking position of the freewheel to the freewheeling position, thereby damping the movement of the rolling elements.
- the contact pressure by the damping mechanism and / or the basic prestressing device need not be in the vicinity of the self-locking limit, but rather is adapted according to the forces actually occurring in the respective operating state.
- a freewheel device which has an outer ring, an inner ring and a plurality of arranged between the outer ring and the inner ring rolling body.
- the inner ring is preferably provided with a polygonal-like profile, so that the rolling elements between the outer ring and the inner ring can take a freewheeling device Sperrpo- position and a freewheeling position.
- damping means is disposed between adjacent rolling bodies (in the circumferential direction), the damping means having a base biasing means for biasing a rolling body in a first circumferential direction (reverse direction of the freewheel) and a damping mechanism for damping the movement of the rolling body in a second circumferential direction (moving from the locking position in FIG the free-running position).
- the basic bias is generated via the base biasing means, and acts on the rolling body, for example, a role that this is always maintained in a contact position between the outer ring and inner ring.
- This differential speed which can lead to a swinging of the rolling body is - A - damped away by the damping mechanism, so that the rolling body at the next engagement in the gap of the freewheel (locking position) calmed before the gap, ie in a defined starting position lies.
- the damping mechanism ensures that the differential kinetic energy between the rolling body and the polygonal profile of the inner ring is absorbed, eg, by being converted into frictional energy (heat) and dissipated.
- a damping device is provided between each pair of circumferentially adjacent rolling bodies. This can act on each rolling body a damping device and each rolling body are damped. This ensures a smooth operation of the freewheel device.
- all damping devices are designed the same, but in principle also different damping devices can be used within a freewheel or only a part of the rolling elements can be damped.
- the basic prestressing device is formed by a spring device which presses the rolling element either directly or indirectly via an intermediate element.
- the spring means can thus each rolling body with a suitable spring force (for example, about 5 to 30 times the roller weight with tangential force) in the gap (nip) between the outer ring and inner ring of the freewheel device are pressed.
- a suitable spring force for example, about 5 to 30 times the roller weight with tangential force
- leaf springs or the like can be used as a base biasing spring.
- the damping mechanism to a friction device, which is preferably in turn spring-loaded.
- the friction device by the friction device, the kinetic energy which it is considered to be damped, converted into frictional energy (heat) and thus damps the movement of the rolling body.
- a spring means may be in frictional contact with the rolling body, for example, a lever provided on a coil spring, a leaf spring portion, or the like may be used therefor.
- the pressing element and thus the friction element on the rolling body may be the same or different, which is also for applying the basic prestressing on the rolling body with this engagement.
- the damping spring is mounted via a freewheel device, for example freewheel rollers, so that in a direction of rotation or movement, the movement of the roller shutter is prevented. body is not blocked or obstructed and rubs in the other direction against the rolling body to apply the damping effect.
- the damping spring can be held in a first position in which it dampens the movement of the rolling elements, or be held in a second position in which it is at least as far mobile that the rolling elements are not damped and on she is not applying any strength.
- the damping spring with the damping freewheel device in such interaction that, for example, a brake lever is fixedly mounted on an inner ring of a damping freewheel device, while the damping spring is in frictional contact with an outer ring of the damping freewheel device via a friction body.
- the brake lever is pivoted in a rotational direction in which the damping freewheel device blocked, so that inner ring and outer ring of the damping freewheel device are twisted together and thus the damping effect of the friction device acting on the outer ring of the damping freewheel device, is being used.
- the inner and the outer ring of the damping freewheel device rotate relative to each other, so that by the basic biasing means on the brake lever without damping by the friction device, the basic biasing force can be applied, as standing in friction contact with the friction body outer ring of the damping freewheel device upon rotation of the Inner ring is not rotated.
- the damping device is formed by a hydraulic device.
- the entire freewheel device is filled with hydraulic fluid.
- the rolling body of the freewheel device is preferably mounted in a roller cage, which in turn forms a piston of a hydraulic device and is biased by the basic prestressing device.
- the piston increases or decreases an oil chamber by its piston movement, which is associated with the movement of the rolling body, with a reduction in the volume of the oil space hydraulic fluid, which is located in the oil chamber, can be dissipated via a shutter and thus the movement of the piston and the Rolling body is damped.
- a check valve is preferably provided in parallel to the diaphragm, so that a direction-dependent damping is achieved.
- the damping device may be formed on a sliding bearing body firmly connected to the inner ring or formed integrally therewith.
- the sliding bearing body can slide on the inner surface of the outer ring.
- Figure 1 is a sectional view perpendicular to the axial direction through a first embodiment of the freewheel device
- Figure 2 shows a detail of Figure 1, wherein the rolling bodies are in a locking position
- Figure 3 shows the detail of Figure 2, wherein the rolling bodies are in a movement from the locking position to the freewheeling position;
- Figure 4 is a second embodiment of the freewheel device in a view corresponding to Figure 1;
- Figure 5 is a section of the freewheel device according to Figure 4, wherein the rolling bodies are in a locking position;
- Figure 6 is the detail of Figure 5, wherein the rolling bodies are in a movement position between the locking position and the free-running position;
- Figure 7 is a third embodiment of the freewheel device in a view corresponding to Figure 1;
- Figure 8 shows a detail of Figure 7, wherein the rolling bodies are in a locking position
- Figure 9 shows the detail of Figure 8, wherein the rolling bodies are in a freewheeling position.
- the freewheel device includes an outer ring 12, to which a connecting rod 14 for articulation of connecting rod-like connecting elements (not shown) for producing a Transmission mechanism is formed by the input shaft of the transmission to an output shaft.
- the outer ring 12 has a substantially cylindrical (circular cylindrical) inner surface 13.
- an inner ring 16 Concentric with the outer ring 12, an inner ring 16 is provided, which may be formed integrally with the output shaft of a transmission, for example, or by jamming or Bracing several freewheel units forms the output shaft of the transmission.
- the inner ring 16 has on its outer circumference a polygonal-like profile 17. Between the inner ring 16 and the outer ring 12 a plurality of (six in this embodiment) rolling elements 18 are provided, which can be held and guided in a common cage.
- the rolling elements 18 are in abutment with the inner surface 13 of the outer ring 12 and the polygonal surface 17 of the inner ring 16 and can be displaced along the polygonal surfaces of the inner ring 16 relative thereto in the circumferential direction by rolling on the inner or outer ring Lock position between the outer ring 12 and the inner ring 16 or a release position between the outer ring 12 and the inner ring 16 provide so that the inner ring 16 and the outer ring 12 can only be rotated together or in a freewheeling position in which they rotate relative to each other are.
- the inner ring 16 is further provided in the regions between two adjacent rolling bodies 18 in the circumferential direction with a sliding bearing body 20.
- the plain bearing body 20 is formed in the embodiment shown in FIG 1 integral with the inner ring 16 and extends from the polygonal profile 17 of the inner ring 16 radially outward.
- the plain bearing body 20 centers the outer ring 12 with respect to the inner ring 16.
- a damping device (generally designated 22) for the rolling elements 18 is also introduced.
- the damping device 22 in turn includes both a base biasing means 24, with which the rollers 18 are biased into the nip between the outer ring 12 and the inner ring 16 (counterclockwise in the figures), and a damping mechanism 26, which the movement of the rolling elements 18, when they are moved out of the nip in the freewheeling position, dampens.
- the basic prestressing device 24 has a helical spring as the basic prestressing spring 28, which is mounted in a recess 29 on the sliding bearing body 20.
- the base biasing spring 28 acts in a substantially radial direction against the rolling body 18, wherein in the illustrated embodiment, no transmission or intermediate element between the base biasing spring 28 and the rolling body 18 is provided. If required, such a transmission element can be interposed.
- a basic biasing spring 28 is provided for each of the rolling bodies 18.
- the damping mechanism 26 of the damping device 22 has a leaf spring 30 as a damping spring, which is held loosely in a recess of the sliding bearing body 20 and can be brought by a freewheel roller assembly 32 in a tense, ie not loose movable position.
- the leaf spring 30 has a friction surface 31, with which it is in abutment against one of the rolling elements 18 and can be brought.
- the friction surface 31 forms a friction device.
- this leaf spring 30 each form an element which is disposed between adjacent rolling elements 18, the leaf springs 30 may also be integrally formed by a cage for the rolling elements 18.
- the damping has an angle until the rollers 18, the leaf springs 30 brace when they are moved from its locked position to the freewheeling position, and abut the stop. From then on, the leaf spring 30 rubs against the associated rolling element 18, thereby destroying the kinetic energy of the rolling element 18.
- the clearance angle i. foundedußer angle of the rolling elements 18 without damping
- the clearance angle is achieved in the embodiment shown in Figures 1 to 3 on the mounting of the leaf spring 30 by means of the freewheel rollers 32.
- a roller 18 comes into contact with the contact surface 31 of the leaf spring 30 in the movement from the gap in the freewheeling position and thus gets into friction.
- the freewheel rollers of the freewheel roller assembly 32 which forms a damping freewheel device, moved into recesses in the plain bearing body 20 until they are in a Biockierposition and thus the leaf spring 30 can not move or change their position.
- the leaf spring 30 rubs on the rolling elements 18.
- FIG. 1 shows the position in which the damping freewheel device by means of the freewheel rollers 32 in the freewheeling position.
- the freewheel rollers 32 are mounted in corresponding recesses in the plain bearing body 20.
- the leaf spring 30 between them receiving freewheel rollers 32 are provided.
- FIGS. 4 to 6 show a further embodiment of the freewheel device 10. Only those components that differ from those of the first embodiment will be described. The other components are essentially the same and functionally identical.
- the plain bearing body 20 with the inner ring 16 is not formed in one piece but formed separately and firmly connected.
- a damping device 22 is integrated, which includes a base biasing device 24 and a damping mechanism 26. However, some components are shared by both the base biasing means 24 and the damping means 26.
- the basic prestressing device 24 is formed from a lever 42 which is mounted non-rotatably on an inner ring 41 of a damping freewheel device 40 and which is preloaded into contact with the rolling element 18 by a basic prestressing spring 43 which is supported on the sliding bearing body 20.
- the basic bias spring 43 is designed, for example, as a helical spring.
- the lever 42 thus has a bearing surface against the rolling body 18 and pushes it with the force of the basic bias spring 43 in the direction of the inner ring 16 and clamping gap.
- the tangential portion of the spring force is, for example, 5 to 30 times the weight of the rolling body 18.
- the damping freewheel device 40 further has an outer ring 44 and between the inner ring 41 and the outer ring 44 mounted clamping body 45.
- a rotation of the lever 42 and thus of the inner ring 41 of the damping freewheel device 40 in the counterclockwise direction in Figures 4 to 6 corresponds to the freewheeling direction of the damping freewheel device 40 and thus without common rotation of the inner ring 41 and the outer ring 44 is possible; Rather, the inner ring 41 is rotated or pivoted relative to the outer ring 44.
- the outer ring 44 is in contact with a friction device 48, which consists of a spring 49 and a contact element 50 to the outer ring 44 of the damping freewheel device 40.
- the contact element 50 constantly presses against the outer ring 44 of the damping freewheel device 40, so that upon rotation of the outer ring 44, the rotational movement of the outer ring 44 and optionally of the inner ring 41 rotated together therewith are damped.
- roller 18 If the roller 18 is moved out of the nip between inner ring 16 and outer ring 12, it presses the lever 42 in the clockwise direction in Figures 4 to 6 and thus in the reverse direction of the damping freewheel device 40, so that in addition to the fixed to the lever 42 connected to the inner ring 41st the outer ring 44 is rotated, which in turn is in frictional contact with the friction device 48.
- the differential speed between the inner ring 16 and the outer ring 12 occurring when releasing the blocking of the freewheel 10 by the friction device 48, in particular the damping of the rotation of the lever 42, damped away.
- FIGS. 7 to 9 A further embodiment of the freewheel device 10 according to the invention is shown in FIGS. 7 to 9. Again, only those components will be described which differ from those of the previous embodiments.
- the plain bearing body 20 is again designed in one piece with the inner ring 16.
- the plain bearing body 20 has a recess which serves as an oil chamber 60.
- a piston-like formed extension 62 of a roller cage 61 in which one of the rolling elements 18 is mounted, is used, which is movable or displaceable in the recess, that the piston-like extension 62 increase or decrease the volume of the oil space by its movement can (movement to the left in Figures 8 and 9: magnification, movement to the right: reduction).
- a recess 65 is provided in the plain bearing body 20, which is closed by a plug 66 and in which a check valve 67 is inserted.
- the recess 65 is connected via a passage 68 with the oil chamber 60 in connection.
- a base biasing spring 70 which constitutes the base biasing means 24 by being applied to the roller cage
- a direction-dependent damping can thus be generated during a movement of the rolling body 18 away from the gap.
- Damping is either Coulomb friction or fluid damping, i. by providing a hydraulic device.
- the damping can act on each individual rolling element 18, so that each individual rolling element can be damped, or act together on a roller cage for the rolling elements, if they are provided in a cage.
- Parallel to the damping, a basic prestressing for the rolling elements (the roller cage) is provided.
- the damping device can be connected to the cage provided for this purpose.
- the base bias may, as shown in the illustrated embodiments, act directly on the rolling body 18 or indirectly via the damping means, i. together with the damping mechanism to be effective.
- the tangential damping force is in each case a multiple of the basic bias.
- the damping can finally be provided for both directions of rotation or directions of travel or only for the direction of forward travel, since only minor forces to be damped occur during reverse travel.
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Rolling Contact Bearings (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE112009001689T DE112009001689A5 (de) | 2008-07-21 | 2009-07-06 | Freilaufeinrichtung mit Dämpfung und Kurbel-CVT-Getriebe mit einer Freilaufeinrichtung |
JP2011519029A JP5611204B2 (ja) | 2008-07-21 | 2009-07-06 | 減衰部を備えたフリーホイール装置及びフリーホイール装置を備えたクランクcvt伝動装置 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102008033953.9 | 2008-07-21 | ||
DE102008033953 | 2008-07-21 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2010009699A1 true WO2010009699A1 (de) | 2010-01-28 |
Family
ID=41168725
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/DE2009/000940 WO2010009699A1 (de) | 2008-07-21 | 2009-07-06 | Freilaufeinrichtung mit dämpfung und kurbel-cvt-getriebe mit einer freilaufeinrichtung |
Country Status (3)
Country | Link |
---|---|
JP (1) | JP5611204B2 (de) |
DE (2) | DE112009001689A5 (de) |
WO (1) | WO2010009699A1 (de) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102959281B (zh) * | 2010-06-29 | 2015-11-25 | 舍弗勒技术股份两合公司 | 自由轮-外环和具有自由轮-外环的曲轴自由轮变速器 |
JP6029214B2 (ja) * | 2013-12-06 | 2016-11-24 | 本田技研工業株式会社 | 車両用動力伝達装置 |
JP6095599B2 (ja) * | 2014-03-19 | 2017-03-15 | 本田技研工業株式会社 | 無段変速機 |
DE102019114455A1 (de) * | 2019-05-29 | 2020-12-03 | Seg Automotive Germany Gmbh | Freilaufeinrichtung für einen Starter und Starter für eine Brennkraftmaschine |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2104320A (en) * | 1935-05-18 | 1938-01-04 | Fischer Stefan | Freewheeling clutch |
US4828086A (en) * | 1987-11-23 | 1989-05-09 | General Motors Corporation | Reduced wear roller clutch |
JPH07317809A (ja) * | 1994-03-30 | 1995-12-08 | Ntn Corp | ワンウェイクラッチにおけるローラの脱落防止装置 |
WO2009014083A1 (ja) * | 2007-07-23 | 2009-01-29 | Ntn Corporation | 温度感応型クラッチ機構 |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2005291268A (ja) * | 2004-03-31 | 2005-10-20 | Nsk Ltd | 一方向ローラクラッチおよび一方向ローラクラッチ内蔵型プーリ装置 |
ATE426761T1 (de) | 2004-10-22 | 2009-04-15 | Luk Lamellen & Kupplungsbau | Antriebsanordnung |
-
2009
- 2009-07-06 WO PCT/DE2009/000940 patent/WO2010009699A1/de active Application Filing
- 2009-07-06 DE DE112009001689T patent/DE112009001689A5/de not_active Withdrawn
- 2009-07-06 DE DE102009031800A patent/DE102009031800A1/de not_active Withdrawn
- 2009-07-06 JP JP2011519029A patent/JP5611204B2/ja not_active Expired - Fee Related
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2104320A (en) * | 1935-05-18 | 1938-01-04 | Fischer Stefan | Freewheeling clutch |
US4828086A (en) * | 1987-11-23 | 1989-05-09 | General Motors Corporation | Reduced wear roller clutch |
JPH07317809A (ja) * | 1994-03-30 | 1995-12-08 | Ntn Corp | ワンウェイクラッチにおけるローラの脱落防止装置 |
WO2009014083A1 (ja) * | 2007-07-23 | 2009-01-29 | Ntn Corporation | 温度感応型クラッチ機構 |
Also Published As
Publication number | Publication date |
---|---|
JP5611204B2 (ja) | 2014-10-22 |
DE102009031800A1 (de) | 2010-01-28 |
DE112009001689A5 (de) | 2011-04-07 |
JP2011528778A (ja) | 2011-11-24 |
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