WO2011134450A1 - Freilauf, insbesondere für ein kurbel-cvt-getriebe - Google Patents
Freilauf, insbesondere für ein kurbel-cvt-getriebe Download PDFInfo
- Publication number
- WO2011134450A1 WO2011134450A1 PCT/DE2011/000406 DE2011000406W WO2011134450A1 WO 2011134450 A1 WO2011134450 A1 WO 2011134450A1 DE 2011000406 W DE2011000406 W DE 2011000406W WO 2011134450 A1 WO2011134450 A1 WO 2011134450A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- groove
- spring
- inner ring
- freewheel
- freewheel according
- 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
-
- 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
- F16D2041/0605—Spring details
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.
- DE 1814968 A, DE 6811650 U and DE 3233073 C2 freewheel clutches are known with a plurality of spaced apart tiltable clamping bodies, 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 spring be biased and held in the engagement or functional engagement direction. 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 takes place as in a cageless needle bearing at the center of the clamping body, for example by means of a meandering spring.
- a cage is not required.
- it may come to group formation of the clamping body in the freewheel, so that an undefined friction for the damping between the clamping bodies occurs.
- Object of the present invention is to develop a freewheel, especially for a crank-CVT transmission, without cage, which prevents the formation of groups of clamp body in the freewheel using an industrialized spring and inexpensive producible meander.
- the freewheel configured in particular for a crank-CVT transmission has an inner ring, an outer ring rotatable relative to the inner ring, which is arranged radially around the inner ring and a plurality of clamping bodies which are arranged between the inner ring and the outer ring and abut each other and through the radially inwardly acting spring force of an engaging in a Anfederungsnut the clamping body circumferential meandering spring can be acted upon in the direction of the inner ring, wherein the meandering spring according to the invention of flat strip material is folded and bent with open ends.
- the Anfederungsnut the clamping elements for receiving the meander spring is designed such that to the meander spring an operative connection is made, which prevents an undesirable inclination of the clamping elements transversely to the direction of rotation.
- the Anfederungsnut is divided into a first groove portion and a second groove portion, wherein both groove portions are arranged at an angle to each other.
- a wall-shaped essentially V-shaped clamping body region is formed between the groove regions, which region tapers radially outward and is formed by the groove base of the two groove regions.
- the meandering spring is in the assembled state, each with one turn at the same time to the groove bottom of the first groove portion and the groove bottom of the second groove area, wherein the angle between the groove bottom of the groove areas is selected so that the adjoining meander spring an erection moment on / the Clamping body transmits.
- the meandering spring counteracting the inclination of the clamping body, engages in the two groove regions and simultaneously assumes a guide for the clamping body (s) when it engages in the Anfederungsnut.
- the groove bottom of the first groove region and the groove base of the second groove region are essentially planar.
- the ends of the meander spring are received in the lateral direction in a spring groove of the outer ring, so that the meander spring is axially fixed. In a possible emergency function, they can not slip apart in the radial direction because of the spring groove.
- the meander spring acts for the first time at two positions on the terminal body locations (line contact), whereby a secure guidance of the clamping body is ensured.
- the angular positions of the two groove areas are chosen so that this results in an erection moment on the clamping body. Since the grooves (for manufacturing reasons) have a substantially planar shape, the meander spring rolls during the rotation of the clamping body in the grooves, ie there is no clean rolling motion, but there is sometimes a sliding movement instead. The resulting friction causes an improvement in te damping of the clamp body. The installation torque must overcome the friction in every situation in order to fulfill the freewheeling function.
- the clamping body are clearly positioned, whereby no group formation of the clamping body can arise more. In the foot area, the clamp body can still touch.
- FIG. 2 shows the three-dimensional representation of a meander spring
- FIG. 3 shows the detail A according to FIG. 2
- Figure 5 shows the three-dimensional representation of a clamp body from the direction of the first
- Figure 6 shows the three-dimensional representation of a clamp body from the direction of the second
- FIG. 10 shows the detail B according to FIG. 9.
- Figure 1 shows a portion of the cross section through a freewheel. This has an inner ring 1 and a relative to the inner ring 1 rotatable outer ring 2, wherein between the inner ring 1 and outer ring 2 clamping body 3 are arranged, which are suitable to transmit torque in the clamping position between the inner ring 1 and outer ring 2.
- the clamping body 3 are acted upon by a circumferential spring, which is designed here as a meander spring 4, with a force acting in the direction of the inner ring 1 spring force F.
- the meander spring 4 is seated in a Anferungsungsnut N of the clamp body 3 and has a first groove portion N1 and a second groove portion N2.
- the first groove area N1 has a substantially planar first groove bottom N1 'and the second groove area N2 has a likewise substantially second second groove base N2'.
- the angle ⁇ between the groove bottom NT and N2 'of the Nuten Anlagene N1, N2 is chosen so that a Aufstellmoment on / the clamping body / n 3 is formed.
- the meander spring 4 rests with one turn at the same time on the first groove bottom NV of the first groove area N1 and on the second groove bottom N2 'of the second groove area N2 and thus engages, counteracting the inclination of the clamping body 3, in the two groove areas N1, N2 of the Anfederungsnut N and at the same time takes over the leadership for the / the clamp body.
- FIG. 4 The detail representation of a clamping body 3 is shown in FIG. 4 as a cross section in the region of the groove N, in FIG. 5 as a three-dimensional representation from the direction of the first groove region N1 and in FIG. 3 as a three-dimensional representation from the direction of the second groove region N2.
- the groove N has a first groove portion N1 with a substantially planar first groove bottom N1 'and a second groove portion N2 with a substantially planar second groove base N2'.
- the groove regions N1, N2 and thus their groove bottom N1 'and N2' are inclined relative to each other at an angle ⁇ (see FIG. 4), whereby a substantially V-shaped clamping body region 3.1 is formed between the grooves N1, N2, which extends radially inward is tapered outside and limited by the groove bottom N1 ', N2' of the two groove areas N1, N2.
- the angle ⁇ between the groove bottom N1 'and N2' of the Nuten Schemee N1, N2 is chosen so that a Aufstelimoment on / the clamping body / n 3 is formed.
- FIG. 7 shows the following functional positions: a) nominal, b) damping, c) mean moment and d) maximum moment.
- FIG 8. A freewheel package of meander spring 4 and 3 clamping bodies in a three-dimensional view is shown in FIG 8.
- the clamp body 3 lie against each other.
- FIG. 9 The longitudinal section through a freewheel having a longitudinal axis A is shown in FIG. 9 and the detail B according to FIG. 9 in FIG.
- the clamping body 3 arranged between inner ring 1 and outer ring 2 have a groove N in which the meandering spring 4 engages.
- the meander spring 4 is seated Dial outside in a spring groove 2.1 of the outer ring and is guided in this axially (in the lateral direction).
- the meander spring 4 takes over the necessary springing and the guiding function of the clamping body 3 on the lateral surfaces of the groove areas N1, N2. This variant is particularly advantageous because it allows a good guide through the two groove areas groove for springing in the smallest space requirement.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Pulleys (AREA)
- Springs (AREA)
Abstract
Description
Claims
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE112011101462T DE112011101462A5 (de) | 2010-04-29 | 2011-04-14 | Freilauf, insbesondere für ein Kurbel-CVT-Getriebe |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102010018775 | 2010-04-29 | ||
| DE102010018775.5 | 2010-04-29 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2011134450A1 true WO2011134450A1 (de) | 2011-11-03 |
Family
ID=44501702
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/DE2011/000406 Ceased WO2011134450A1 (de) | 2010-04-29 | 2011-04-14 | Freilauf, insbesondere für ein kurbel-cvt-getriebe |
Country Status (2)
| Country | Link |
|---|---|
| DE (2) | DE102011016997A1 (de) |
| WO (1) | WO2011134450A1 (de) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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. |
| JPH01120440A (ja) * | 1987-10-30 | 1989-05-12 | Nsk Warner Kk | ワンウェイクラッチのドラグストリップ |
| DE3233073C2 (de) | 1982-03-24 | 1992-03-05 | Borg-Warner Automotive K.K., Nabari, Jp | |
| EP0519706A1 (de) * | 1991-06-19 | 1992-12-23 | Dana Corporation | Aus Draht gebildetes Halteteil für Klemmkörper |
| EP1584831A1 (de) * | 2003-01-09 | 2005-10-12 | Koyo Seiko Co., Ltd. | Freilaufkupplungsfeder |
| DE102009052068A1 (de) * | 2008-12-01 | 2010-06-02 | Luk Lamellen Und Kupplungsbau Beteiligungs Kg | Freilauf für ein Kurbel-CVT-Getriebe |
-
2011
- 2011-04-14 DE DE102011016997A patent/DE102011016997A1/de not_active Withdrawn
- 2011-04-14 WO PCT/DE2011/000406 patent/WO2011134450A1/de not_active Ceased
- 2011-04-14 DE DE112011101462T patent/DE112011101462A5/de not_active Withdrawn
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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. |
| DE3233073C2 (de) | 1982-03-24 | 1992-03-05 | Borg-Warner Automotive K.K., Nabari, Jp | |
| JPH01120440A (ja) * | 1987-10-30 | 1989-05-12 | Nsk Warner Kk | ワンウェイクラッチのドラグストリップ |
| EP0519706A1 (de) * | 1991-06-19 | 1992-12-23 | Dana Corporation | Aus Draht gebildetes Halteteil für Klemmkörper |
| EP1584831A1 (de) * | 2003-01-09 | 2005-10-12 | Koyo Seiko Co., Ltd. | Freilaufkupplungsfeder |
| DE102009052068A1 (de) * | 2008-12-01 | 2010-06-02 | Luk Lamellen Und Kupplungsbau Beteiligungs Kg | Freilauf für ein Kurbel-CVT-Getriebe |
Also Published As
| Publication number | Publication date |
|---|---|
| DE102011016997A1 (de) | 2011-12-15 |
| DE112011101462A5 (de) | 2013-02-07 |
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