EP2370706A1 - Freilaufkupplung - Google Patents
FreilaufkupplungInfo
- Publication number
- EP2370706A1 EP2370706A1 EP09760140A EP09760140A EP2370706A1 EP 2370706 A1 EP2370706 A1 EP 2370706A1 EP 09760140 A EP09760140 A EP 09760140A EP 09760140 A EP09760140 A EP 09760140A EP 2370706 A1 EP2370706 A1 EP 2370706A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- clamping
- clutch according
- overrunning clutch
- clamping plate
- spring
- 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.)
- Withdrawn
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
- F16D41/12—Freewheels or freewheel clutches with hinged pawl co-operating with teeth, cogs, or the like
- F16D41/125—Freewheels or freewheel clutches with hinged pawl co-operating with teeth, cogs, or the like the pawl movement having an axial component
-
- 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
- F16D41/12—Freewheels or freewheel clutches with hinged pawl co-operating with teeth, cogs, or the like
- F16D41/14—Freewheels or freewheel clutches with hinged pawl co-operating with teeth, cogs, or the like the effective stroke of the pawl being adjustable
Definitions
- the invention relates to a form-locking freewheel coupling, also referred to as a pawl lock.
- a positive overrunning clutch which operates with individual, each arranged in a pocket latches.
- Each pawl has a cross-section that is thicker in an area in the middle between opposing thrust load bearing surfaces. This cross-section is intended to reduce the likelihood of failure of the pawl during high static loading.
- the mid-thickened shape of the pawl provides a pivoting ridge for the purpose of controlling pawl movement during the transition from a free-spinning mode to an engaging mode. Irrespective of the mode in which the freewheel clutch known from US Pat. No. 6,332,520 B1 is located, the pawl is loaded by the force of a spring, for example a Z-shaped spring. The pawls thereby generate a typical clicking sound in free-spinning mode.
- the invention has for its object to provide a positive overrunning clutch, which is characterized by high transferable forces by a particularly favorable noise behavior in a wide speed range, especially in idle mode.
- the overrunning clutch may be formed as a rotary overrunning clutch or as a linear overrunning clutch, wherein two relatively rotatable or linearly displaceable elements are referred to as a drive element and as a driven element.
- the terms "drive element” and “driven element” are chosen only for conceptual distinction and do not state which of the said elements is driven by the other element or is supported on this.
- the drive element has a number of pockets, while the driven element has a latching structure opposite the pockets.
- the driven element In a gap space formed between the drive element and the output element, that is to say the driven element, there are clamping plates, wherein each clamping plate is at least partly located within a pocket. is ordered.
- the clamping plates are provided for engagement in the latching structure and spring-loaded against it.
- the overrunning clutch further has at least one sliding element which can be displaced relative to a pocket, which interacts with the clamping plate and with the driven element in such a way that the clamping plate moves in a first direction of movement of the drive element relative to the driven element, that is to say when the overrunning clutch is locked Locking structure is engaged, while it is in the opposite direction of movement, that is in the free running mode, completely lifted off the latching structure.
- the sliding element is limited relative to the drive element and infinitely movable relative to the driven element.
- the sliding element is designed as a drag cage, which has an opening for each clamping plate.
- all clamping plates can be sprung by a single spring band against the latching structure. It is also possible to spring each clamp separately by means of a spring against the latching structure.
- the tow cage In the case of a linear one-way clutch, the tow cage has the form of a ladder; in the case of a rotary one-way clutch, the tow cage is annular.
- a separate sliding element namely a sliding plate, cooperates with each clamping plate.
- the clamping plates are preferably arranged in a clamping trough which is fixed in a pocket of the drive element.
- This design has the advantage that the drive element compared to the clamping trough of a relatively low-loadable material, such as plastic, light metal or unhardened steel, can be made.
- the sliding plate on the clamping trough is captive, preferably guided in a linearly movable manner by means of two side parts which surround the clamping trough.
- each clamping plate in cross-section is preferably praxissym metric.
- a bearing surface of the clamping plate is provided for transmitting a force to a locking surface of the latching structure and preferably rounded so that a curved contour of the bearing surface describes an arc of a circle, which lies in a plane in which the clamping plate extends.
- the clamping plate is preferably at an osculation of at least 101 percent, preferably 105 percent, at the blocking surface.
- the relationship between the radius of a circle describing the contour of the blocking surface and the radius of the circle describing the supporting surface of the clamping plate is referred to as osculation.
- the overrunning clutch is relatively insensitive to angular errors between the drive element and the driven element: Even in cases where the axis of symmetry of the drive element not exactly with the axis of symmetry of the driven element coincides, the force between the clamping plate and the locking structure of the driven element is transmitted mainly in the region of the center of the bearing surface of the clamping plate.
- Each arrangement of a clamping trough, a clamping plate accommodated therein, a sliding plate guided on the clamping trough and a spring element which preferably acts both on the sliding plate and on the clamping plate, constitutes a constructional unit referred to as a clamping unit whose named individual parts are captively coupled with one another ,
- a clamping unit is used in an identical design either for a linear freewheel or a rotary freewheel.
- the freewheel comprises a smaller or larger number of clamping units.
- FIG. 7 is a spring band of the one-way clutch according to Fig. 6,
- FIG. 11 is a spring band of the one-way clutch according to Fig. 10,
- FIG. 13 is a spring band of the one-way clutch according to Fig. 12,
- FIG. 14 shows a seventh embodiment of an overrunning clutch in the locked state
- FIG. 15 shows the overrunning clutch according to FIG. 14 in free-running condition
- FIG. 14 shows a seventh embodiment of an overrunning clutch in the locked state
- FIG. 15 shows the overrunning clutch according to FIG. 14 in free-running condition
- FIG. 16 is a schematic view of a detail of a clamping plate and of a subsequent structure of the one-way clutch according to FIG. 14, FIG.
- FIG. 17-22 in various views a clamping unit of an eighth embodiment of a one-way clutch.
- a one-way clutch 1 shown in cross section in Figure 1 has a drive element 2 and a driven element 3, between which a gap 4 is formed.
- the drive element 2 is fixedly connected or identical to a stator of a torque converter, while the driven element 3 is a wave washer.
- the overrunning clutch 1 is constructed overall as a positive axial latch lock.
- the gap 4 is in a plane normal to the axis of rotation or symmetry of the drive element 2 and the driven element 3.
- the one-way clutch 1 is shown in the locked state; a force acting on the drive element 2 and on the driven element 3 is denoted by F, wherein the corresponding force vectors are aligned tangentially with respect to the axis of the overrunning clutch 1.
- the force F is transmitted between the elements 2, 3 by means of a clamping plate 5, which is arranged in a pocket 6 of the drive element 2 and engages in a latching structure 7 of the driven element 3.
- the one-way clutch 1 a plurality of clamping plates 5, usually at least three pieces on.
- the gap 4 designed as Schleppkalfig sliding element 8, a rolling element 9, which is loaded by a first spring 10, and a second spring 11.
- the latter spring 11 presses the clamping plate 5 toward the locked position
- the first Spring 10 the rolling element 9, for example, a ball or roller, in such a wedge-shaped space between the clamping plate 5 and the sliding member 8 expresses that the sliding member 8 is pressed against the driven member 3.
- the clamping plate 5 has two bearing surfaces 12, 13, which are aligned at least approximately normal to the tangential direction, that is to the force vectors F, and rest against a blocking surface 14 within the pocket 6 or against a blocking surface 15 of the latching structure 7.
- an overrunning clutch 1 illustrated in FIG. 1 represents a radial one-way clutch.
- the drive element 2 is designed as an outer ring and the driven element 3 as an inner ring, wherein the clamping plates 5 and the sliding element 8, namely a drag cage, radially between the drive element 2 and the driven element 3 are located.
- the clamping plates 5 and the sliding element 8, namely a drag cage, radially between the drive element 2 and the driven element 3 are located.
- the annular gap space 4 a single, all clamping plates 5 anfederndes, individual spring tongues 16 exhibiting spring band 17, which is shown separately in Fig. 4.
- the one-way clutch 1 according to FIG. 3 is shown in free-running operation, with clamping plates 5 completely lifted off from the latching structure 7, FIG. wherein the free-running member 3 rotates at an angular velocity ⁇ .
- the clamping plates 5 of the one-way clutch 1 according to FIG. 3 have a point-symmetrical and with respect to two axes, namely one extending in the longitudinal direction of the clamping plate 5 and an orthogonal thereto axis, symmetrical cross-section.
- Clamping plates 5 with a fully symmetrical cross section are also provided in the exemplary embodiment according to FIGS. 6 and 7.
- This overrunning clutch 1 is - as well as the variant of Figure 1 - constructed as an axial pawl lock.
- the spring band 17 of the one-way clutch 1 according to FIG. 6 is bent into a disk in such a way that it lies substantially in one plane, namely a plane normal to the axis of rotation of the one-way clutch 1, wherein the spring tongues 16 are deflectable in the axial direction. It thus differs fundamentally from the embodiment according to FIGS. 3 to 5, in which the spring band 17 substantially describes the wall of a cylinder and the deflection of the spring tongues 16 takes place in the radial direction.
- FIGS. 8, 10 and 12 also each show an axially acting, positive-locking one-way clutch 1.
- their hold in spring band 17 is improved by the contour of the clamping plates 5.
- the engagement of the clamping plates 5 is optimized in the transition from the freewheeling operation in the locked operation of the overrunning clutch 1. Due to the point-symmetrical cross-sectional design, the clamping plates 5 are used only in the correct position in the one-way clutch 1. This also applies to the embodiments according to Figures 10 and 12.
- the supporting surfaces 12,13 of the clamping plates 5 and the directly cooperating with these locking surfaces 14,15 in cross section each have a portion of a straight line ,
- the slider 8 also referred to as Schlepphimfig, manufactured as a metal part by sheet metal forming.
- double-angled webs 18 of the drag cage 8 enable a particularly dense arrangement of the clamping plates 5 and thus a transmission of a particularly high torque in the locked state of the overrunning clutch visible in FIG 1.
- each embodiment of a drag cage sliding element 8 embodiment is given in principle the ability to hold the drag cage 8 such that the clamping plates 5 are lifted from the latching structure 7 and thus the freewheeling function is disabled.
- the holding of the sliding element 8 in such a switchable overrunning clutch 1 can be done for example by means of a mechanical, an electromechanical or a magnetic actuator.
- the exemplary embodiment according to FIGS. 14 and 15 differs from the above-described exemplary embodiments in that individual clamping troughs 19 are inserted into the drive element 2 indicated only by dashed lines, in each of which a clamping plate 5 is arranged.
- the one-way clutch 1 locks when acting on the drive member 2 and the driven member 3 forces inTranslationscardi T and is in free-running operation when the drive member 2 and the driven member 3 relative to each other - as indicated in Fig. 15 - rotate at angular velocity ⁇ .
- the basic mode of operation of the number of clamping troughs 19 having one-way clutch 1 does not differ from thoseticiansfor- men, in which the clamping plates 5 are inserted directly into the pockets 6 of the drive element 2.
- clamping plates 5 which are suitable for one-way clutches 1 without clamping trays, are also suitable for the design according to FIGS. 14 and 15.
- a schematic, fragmentary plan view of a clamping plate 5 and the locking structure 7 adjoining thereto are illustrated in FIG. 16 by the osculation with which the bearing surface 12 of the clamping plate 5 rests against the blocking surface 14.
- the center of a circle, which is described by the contour of the bearing surface 12, is denoted by M here.
- the clamping plate 5 is likewise arranged in a clamping trough 19, which is provided for insertion into a pocket 6 of the drive element 2, which has a comparatively low mechanical load.
- a sliding element 8 is slidably guided on this.
- lateral parts 20, 21 of the sliding element 8 surround the clamping trough 19 such that a linear sliding bearing 22 is formed.
- a spring element 23 inserted into the clamping trough 19 is provided which has two outer spring tongues 24 and one inner spring tongue 25.
- the outer spring tongues 24 engage directly on the sliding member 8, while the inner spring tongue 25 acts on the clamping plate 5.
- the clamping plate 5 of the one-way clutch 1 according to Figures 17 to 22 in cross-section on both sides, that is rounded both on the recorded in the clamping trough 19 end and provided for engagement in the latching structure 7 end ,
- the contour of the clamping plate 5 describes a bow 26,27, which extends over more than 180 °.
- the locking surface 14 provided by the clamping trough 19, against which the clamping plate 5 rests in the region of the arc 26, is likewise rounded off - in the form of the clamping plate 5. This rounding is formed orthogonal to the rounding of the supporting surface 12 explained with reference to FIG. 16.
- a lifting of the clamping plate 5 of the clamping trough 19 in the region of the locking surface 14 is at most slightly possible, since the sliding member 8 has a recess 28 formed in the direction of the bottom of the clamping trough 19 in this area.
- the sliding element 8 has a further recess 29, which has the purpose of allowing a limited immersion of the clamping plate 5 in the clamping trough 19.
- the sliding member 8 strikes a provided by the clamping trough 19 stop 30 at.
- the sliding element 8 is only relatively slightly displaceable, with a quick switching between free-running and locked operation of the one-way clutch 1 is possible.
- the backlash mentioned angle by which the one-way clutch 1 can be turned back in the case of training as a rotary freewheel when locking, is only about 3 ° to 15 °. The low backlash ensures that the transition from free-running to locked mode is quiet.
- the clamping trough 19 can be produced efficiently as a drawn, case-hardened steel part, while the clamping plate 5 is pulled and hardened in a preferred embodiment.
- the sliding element 8 is preferably made of steel and nitrocarburized. Alternatively, non-ferrous alloys are suitable for the production of the sliding element 8.
- a stainless steel is preferably used.
- all components of the clamping unit according to the figures 17 to 22 are made of metallic materials.
- plastics or light metal alloys are suitable for the production of the drive element 2, in which the clamping troughs 19 are fixed, on the other hand, in addition to steel, in particular non-hardened steel, also plastics or light metal alloys are suitable.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Mechanical Operated Clutches (AREA)
- One-Way And Automatic Clutches, And Combinations Of Different Clutches (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102008059188A DE102008059188A1 (de) | 2008-11-27 | 2008-11-27 | Freilaufkupplung |
PCT/EP2009/065604 WO2010060873A1 (de) | 2008-11-27 | 2009-11-23 | Freilaufkupplung |
Publications (1)
Publication Number | Publication Date |
---|---|
EP2370706A1 true EP2370706A1 (de) | 2011-10-05 |
Family
ID=41560395
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP09760140A Withdrawn EP2370706A1 (de) | 2008-11-27 | 2009-11-23 | Freilaufkupplung |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP2370706A1 (de) |
DE (1) | DE102008059188A1 (de) |
WO (1) | WO2010060873A1 (de) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN108368894B (zh) * | 2015-11-25 | 2020-11-10 | 敏思工业公司 | 与可控连接组件一起使用的机电装置以及连接和机电控制组件 |
US11098770B2 (en) * | 2016-11-10 | 2021-08-24 | Magna Powertrain, Inc. | Dual-acting electric one-way clutch assembly |
US10876582B2 (en) * | 2019-04-12 | 2020-12-29 | GM Global Technology Operations LLC | Selectable one-way clutches with notch plate inserts for engine disconnect devices of motor vehicle powertrains |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5853073A (en) * | 1996-09-03 | 1998-12-29 | Borg-Warner Automotive, Inc. | Ratchet one-way clutch assembly |
US6338403B1 (en) | 1996-09-03 | 2002-01-15 | Borgwarner Inc. | Ratchet clutch with bearing surfaces |
US6125979A (en) * | 1996-09-03 | 2000-10-03 | Borgwagner Inc. | Ratchet one-way clutch assembly with restraining members |
JP2003526758A (ja) * | 1998-03-02 | 2003-09-09 | ボーグワーナー・インコーポレーテッド | ワンウェイラチェットクラッチ組立体 |
US6186299B1 (en) | 1999-08-13 | 2001-02-13 | Means Industries, Inc. | Overrunning coupling assembly |
US6332520B1 (en) | 2000-06-14 | 2001-12-25 | Borgwarner Inc. | Planar ratchet one way clutch |
US7258214B2 (en) * | 2005-06-09 | 2007-08-21 | Means Industries, Inc. | Overrunning coupling assembly and method for controlling the engagement of planar members |
ZA200802817B (en) * | 2005-09-02 | 2009-09-30 | Gkn Sinter Metals Inc | Overrunning clutch |
-
2008
- 2008-11-27 DE DE102008059188A patent/DE102008059188A1/de not_active Withdrawn
-
2009
- 2009-11-23 EP EP09760140A patent/EP2370706A1/de not_active Withdrawn
- 2009-11-23 WO PCT/EP2009/065604 patent/WO2010060873A1/de active Application Filing
Non-Patent Citations (1)
Title |
---|
See references of WO2010060873A1 * |
Also Published As
Publication number | Publication date |
---|---|
WO2010060873A1 (de) | 2010-06-03 |
DE102008059188A1 (de) | 2010-06-02 |
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Legal Events
Date | Code | Title | Description |
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PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
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17P | Request for examination filed |
Effective date: 20110627 |
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AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO SE SI SK SM TR |
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DAX | Request for extension of the european patent (deleted) | ||
RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: SCHAEFFLER TECHNOLOGIES AG & CO. KG |
|
RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: SCHAEFFLER TECHNOLOGIES GMBH & CO. KG |
|
RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: SCHAEFFLER TECHNOLOGIES AG & CO. KG |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
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18D | Application deemed to be withdrawn |
Effective date: 20160601 |
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P01 | Opt-out of the competence of the unified patent court (upc) registered |
Effective date: 20230523 |