WO2011003380A1 - Freilauf, insbesondere für ein kurbel-cvt-getriebe - Google Patents
Freilauf, insbesondere für ein kurbel-cvt-getriebe Download PDFInfo
- Publication number
- WO2011003380A1 WO2011003380A1 PCT/DE2010/000689 DE2010000689W WO2011003380A1 WO 2011003380 A1 WO2011003380 A1 WO 2011003380A1 DE 2010000689 W DE2010000689 W DE 2010000689W WO 2011003380 A1 WO2011003380 A1 WO 2011003380A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- inner ring
- clamping body
- foot
- head
- region
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
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
- F16D41/069—Freewheels or freewheel clutches with intermediate wedging coupling members between an inner and an outer surface the intermediate members wedging by pivoting or rocking, e.g. sprags
- F16D41/07—Freewheels or freewheel clutches with intermediate wedging coupling members between an inner and an outer surface the intermediate members wedging by pivoting or rocking, e.g. sprags between two cylindrical surfaces
Definitions
- the present invention relates to a freewheel, in particular for a crank-CVT transmission.
- a CVT is a uniformly translating gearbox in which the ratio of the speeds of the driving and driven shafts, the gear ratio, can assume an infinite number of values (levels) within a certain range. This can also include the standstill or the reversal of the direction of rotation of a shaft.
- the transmission of the movement takes place via a non-fixed coupling of components whose geometries determine the gear effect according to the lever principle.
- a ratio change is achieved by changing these component geometries, but at the same time can not be done without changing the geometries at the point of component coupling.
- clamp bodies which are arranged between an inner ring formed by a region of the output shaft and an outer ring.
- the surfaces of the outer ring and the inner ring are matched to one another such that the clamping body can block this rotation in a Relatiwerdusraum between inner ring and outer ring, so that the outer ring and the inner ring are rotated together.
- 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.
- one-way clutches with a plurality of spaced apart tiltable clamping bodies known, which are inserted between an outer ring 1 and an inner ring, wherein the clamping body are guided in a cage and by means of an inwardly exciting circumferential biased in engagement or function engagement spring are held or held. Through the middle of the clamping body a rectilinear groove is formed for receiving the spring.
- the springs may be in the form of a ring spring, an annular groove spring or a spiral spring (worm spring), which engages in Wurmfedernuten the clamping body in the latter case.
- sprag clutches without cage known in which the leadership of the tiltable clamping body as in a cageless needle bearing at the center of the clamp body, for example by means of a meander, wherein the clamping body abut each other.
- the disadvantage is that the clamping body can rotate unintentionally, especially in cageless freewheelers around its own axis of rotation with high dynamics and thereby the clamping function is impaired.
- Object of the present invention is to develop a freewheel, especially for a crank-CVT transmission without cage, in which an unwanted rotation of the clamp body is prevented.
- the freewheel in particular for a crank-CVT transmission, has an inner ring, an outer ring rotatable relative to the inner ring in at least one rotational direction, which is arranged radially around the inner ring, and a plurality of clamping body having a head portion and a foot portion which between the Inner ring and the outer ring are arranged and abut each other and can be acted upon by the radially inwardly acting spring force of a groove in a Anfede- ment circumferential spring in the direction of the inner ring, according to the invention, the leadership of the clamping body is formed simultaneously both in the head and in the foot area and the clamping body in the head and foot are designed in the form of a cycloid.
- the clamp body thus have less freedom of movement and are then taken away from other sprags when the spring, which may be formed in particular as a meander or worm spring, some clamp body can not properly press into the nip.
- the width of the clamping body in the head area is greater than the width in the foot area, which in total more space in the circumferential direction for the rolling of the meandering spring is available in the Klemm redesignnut.
- the gained space can be used for an improved feathering function.
- the Anfederungsnut has to increase the lever arm in impact on a pressure surface for the spring, which is substantially convexly curved in the freewheeling direction and in the damping region of the clamping body terminates substantially straight. Furthermore, the pressing surface of the Anfederungsnut in the freewheeling direction in the direction of the inner ring is inclined radially sloping downwards.
- Another advantage is the improved springing, by the enlarged lever in the impact lever arm of the meander, which facilitates the installation of the clamping body.
- FIG. 1 shows the front view of a clamping body
- 2 shows the freewheel at different operating positions
- Figure 3 part of a cross section of the freewheel in the region of the groove of the clamping body in
- Figure 4 part of a cross section of the freewheel in the region of the groove of the clamping body in impactposition.
- FIG. 1 shows the front view of a clamping body 3 with a foot region 3.1 and a head region 3.2, wherein the foot region 3.1 in the direction of the inner ring, not shown here, with a first contact surface 3a and the head region 3.2 to the outer ring of the freewheel not shown here with a second contact surface 3b points.
- the foot area 3.1 has a width b1 and the head area has a comparatively larger width b2. In between, an unspecified constriction is formed.
- pivoting direction of the clamping body 3 in impact action (positive direction of rotation +) is a first contact surface 3c and opposite thereto formed a second abutment surface 3d, facing in the direction of the adjoining adjacent clamping bodies.
- the clamping body 3 further has an Anfederungsnut N (see Fig. 3 and 4) open towards the outer ring, which has a here shown in dashed lines Andschreibfiguration 3f, against which a spring not shown here, for example. acts in the form of a meander spring.
- the pressing surface 3f In the direction of the second contact surface 3d, the pressing surface 3f has a region 3f which is shown in bold in the damping region and extends essentially straight.
- the clamping elements By the radially inwardly directed spring action of the spring, the clamping elements are acted upon in the direction of the inner ring.
- the clamping elements 3 are pressed into a clamping gap of the inner ring (not shown).
- the freewheel at different operating positions from an impact position to a maximum torque is shown in the individual images a) to d) of FIG. 2.
- the freewheel consists of the inner ring 1, the outer ring 2, the clamping bodies 3 arranged therebetween and of a meander spring 4 which engages in a not visible here groove of the clamping body 3 and this acts radially inwardly towards the inner ring 1.
- FIG. 2 shows the impact position in which the clamping bodies 3 were pivoted by a positive acceleration + so that the head portion 3.1 was pivoted in the direction of the positive acceleration (here to the right).
- the clamping body 3 detach themselves with their contact surfaces 3 a from the inner ring 1, whereby a clearance between the outer and inner ring 2, 1 ensures and damping is generated.
- the adjacent clamping elements 3 abut one another both in the foot region 3.1 in a first guide point P1 and in the head region 3.2 in a second guide point P2 (a linear contact results over the length of the clamping body 3).
- On the opposite side is a touch in an impact point P3, which favors the lifting of the clamp body 3.
- b) shows the nominal position of the clamping body 3 with the first guide point P1 and the second guide point P2.
- c) shows a position of the clamping bodies 3 for transmitting an average moment between the outer ring 2 and inner ring 1, wherein the first guide point P1 inward and the second guide point P2 have "shifted" outwards
- d) shows the position for transmission of the maximum torque at a negative acceleration -, whereby the head portion 3.2 of the clamping body 3 was pivoted to the left and is pressed with its contact surfaces 3a and 3b against inner ring 1 and outer ring 2 and thus maximum torques between the outer and inner ring 2, 1 are transferable Pivoting movement of the clamping body 3 rolls off the convexly rounded first contact surface 3a on the inner ring 1 and the convexly curved second contact surface 3b on the outer ring 2.
- the foot regions 2.1 are in the adjacent clamping bodies 3 in a first guide point P1 and the head areas 3.2 in a second
- a Umkippschutz the clamping body 3 is realized because the contact surface 3d of the head portion 3.2 of a clamping body 3 on the contact surface 3c of the Foot area 3.1 of the negative direction of rotation - arranged in front of it clamp body 3 and thus can not move radially inward.
- FIGS. 3 and 4 The section of a cross section of the freewheel in the region of the Anfederungsnut N of the clamping body 3 in the nominal position is shown in Figure 3 and in Impactposition in Fig. 4. It can be seen from FIGS. 3 and 4 that the meander spring 4 engages in the groove N and acts against the pressing surface 3f of the Anfederungsnut N.
- the pressing surface 3f of the Anfootungsnut N has the bold lined substantially rectilinear region 3f. In the nominal position acc. 3, the rectilinear region 3f lies approximately completely against the inner contour of the meander spring 4. And there results a first lever arm of the meander spring 4 with a length L1. Move the clamp body 3 in the impact position acc. Fig.
- the clamping body have less freedom of movement due to the new geometry, which prevents tilting. Furthermore, the clamp body are thereby also taken away from the other, when due to the tolerance position, the meander or worm spring does not press some clamp body properly in the nip of the inner ring. This means that always reliably all clamp bodies are pressed simultaneously into the nip. LIST OF REFERENCES
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Clamps And Clips (AREA)
- General Details Of Gearings (AREA)
- Transmission Devices (AREA)
- Springs (AREA)
Abstract
Description
Claims
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2012518746A JP5656991B2 (ja) | 2009-07-09 | 2010-06-17 | 特にクランクcvt伝動装置に用いられるフリーホイール |
| DE112010002860T DE112010002860A5 (de) | 2009-07-09 | 2010-06-17 | Freilauf, insbesondere für ein Kurbel-CVT-Getriebe |
| CN201080021619.0A CN102428289B (zh) | 2009-07-09 | 2010-06-17 | 自由轮,尤其是用于曲轴cvt变速器的自由轮 |
| US13/285,419 US8424660B2 (en) | 2009-07-09 | 2011-10-31 | Free wheel, especially for a crank CVT |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102009032337 | 2009-07-09 | ||
| DE102009032337.6 | 2009-07-09 |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US13/285,419 Continuation US8424660B2 (en) | 2009-07-09 | 2011-10-31 | Free wheel, especially for a crank CVT |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2011003380A1 true WO2011003380A1 (de) | 2011-01-13 |
Family
ID=42768054
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/DE2010/000689 Ceased WO2011003380A1 (de) | 2009-07-09 | 2010-06-17 | Freilauf, insbesondere für ein kurbel-cvt-getriebe |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US8424660B2 (de) |
| JP (1) | JP5656991B2 (de) |
| CN (1) | CN102428289B (de) |
| DE (2) | DE102010024164A1 (de) |
| WO (1) | WO2011003380A1 (de) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017133722A1 (de) * | 2016-02-02 | 2017-08-10 | Schaeffler Technologies AG & Co. KG | Freilauf und startvorrichtung mit dem freilauf |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010063249A2 (de) * | 2008-12-01 | 2010-06-10 | Luk Lamellen Und Kupplungsbau Beteiligungs Kg | Freilauf für ein kurbel-cvt-getriebe |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2777551A (en) * | 1954-12-24 | 1957-01-15 | New Prod Corp | Sprag mechanism |
| DE1814968A1 (de) | 1968-12-16 | 1970-07-02 | Mueller Georg Kugellager | Freilaufkupplung mit kippbaren Klemmkoerpern |
| FR2144067A5 (de) * | 1971-06-29 | 1973-02-09 | Skf Cie Applic Mecanique | |
| DE2204305A1 (de) * | 1972-01-31 | 1973-08-09 | Ringspann Maurer Kg A | Klemmkoerper fuer freilaufkupplungen |
| DE6811650U (de) | 1968-12-16 | 1974-01-03 | Mueller Georg Kugellager | Freilaufkupplung mit kippbaren klemmkoerpern. |
| DE3233073C2 (de) | 1982-03-24 | 1992-03-05 | Borg-Warner Automotive K.K., Nabari, Jp | |
| DE4032915A1 (de) * | 1990-10-17 | 1992-04-23 | Hermann Grothe | Welle-nabe-verbindung |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2900057A (en) * | 1954-02-03 | 1959-08-18 | Gen Motors Corp | Clutch for engine starting device |
| US2881886A (en) * | 1954-11-01 | 1959-04-14 | Borg Warner | One-way clutches |
| US2901072A (en) * | 1956-06-01 | 1959-08-25 | Ringspann Maurer Kg A | Over-running clutch couplings or the like |
| DE1189331B (de) * | 1961-04-29 | 1965-03-18 | Ringspann Maurer Kg A | Freilaufkupplung mit kippbaren Klemmstuecken |
| US3730316A (en) * | 1971-04-30 | 1973-05-01 | Borg Warner | One-way clutch |
| JPS63285336A (ja) * | 1987-05-18 | 1988-11-22 | Borg Warner Ootomooteibu Kk | 一方向クラッチ |
| JPH01113629U (de) * | 1988-01-26 | 1989-07-31 | ||
| JP2003113873A (ja) * | 2001-10-05 | 2003-04-18 | Nsk Warner Kk | ワンウェイクラッチ装置 |
| JP4115178B2 (ja) * | 2002-05-31 | 2008-07-09 | 本田技研工業株式会社 | 自転車用無段変速装置 |
| EP1582758B1 (de) * | 2004-04-01 | 2009-12-30 | Paul Müller GmbH & Co. KG Unternehmensbeteiligungen | Kupplungsvorrichtung mit Klemmkörpern |
-
2010
- 2010-06-17 JP JP2012518746A patent/JP5656991B2/ja not_active Expired - Fee Related
- 2010-06-17 DE DE102010024164A patent/DE102010024164A1/de not_active Withdrawn
- 2010-06-17 WO PCT/DE2010/000689 patent/WO2011003380A1/de not_active Ceased
- 2010-06-17 CN CN201080021619.0A patent/CN102428289B/zh not_active Expired - Fee Related
- 2010-06-17 DE DE112010002860T patent/DE112010002860A5/de not_active Withdrawn
-
2011
- 2011-10-31 US US13/285,419 patent/US8424660B2/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2777551A (en) * | 1954-12-24 | 1957-01-15 | New Prod Corp | Sprag mechanism |
| DE1814968A1 (de) | 1968-12-16 | 1970-07-02 | Mueller Georg Kugellager | Freilaufkupplung mit kippbaren Klemmkoerpern |
| DE6811650U (de) | 1968-12-16 | 1974-01-03 | Mueller Georg Kugellager | Freilaufkupplung mit kippbaren klemmkoerpern. |
| FR2144067A5 (de) * | 1971-06-29 | 1973-02-09 | Skf Cie Applic Mecanique | |
| DE2204305A1 (de) * | 1972-01-31 | 1973-08-09 | Ringspann Maurer Kg A | Klemmkoerper fuer freilaufkupplungen |
| DE3233073C2 (de) | 1982-03-24 | 1992-03-05 | Borg-Warner Automotive K.K., Nabari, Jp | |
| DE4032915A1 (de) * | 1990-10-17 | 1992-04-23 | Hermann Grothe | Welle-nabe-verbindung |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017133722A1 (de) * | 2016-02-02 | 2017-08-10 | Schaeffler Technologies AG & Co. KG | Freilauf und startvorrichtung mit dem freilauf |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2012532290A (ja) | 2012-12-13 |
| US20120073927A1 (en) | 2012-03-29 |
| US8424660B2 (en) | 2013-04-23 |
| DE112010002860A5 (de) | 2012-08-30 |
| CN102428289A (zh) | 2012-04-25 |
| DE102010024164A1 (de) | 2011-01-13 |
| JP5656991B2 (ja) | 2015-01-21 |
| CN102428289B (zh) | 2014-03-26 |
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