WO2017080549A1 - Accouplement à action bidirectionnelle - Google Patents

Accouplement à action bidirectionnelle Download PDF

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Publication number
WO2017080549A1
WO2017080549A1 PCT/DE2016/200485 DE2016200485W WO2017080549A1 WO 2017080549 A1 WO2017080549 A1 WO 2017080549A1 DE 2016200485 W DE2016200485 W DE 2016200485W WO 2017080549 A1 WO2017080549 A1 WO 2017080549A1
Authority
WO
WIPO (PCT)
Prior art keywords
coupling ring
coupling
ring
inner coupling
annular gap
Prior art date
Application number
PCT/DE2016/200485
Other languages
German (de)
English (en)
Inventor
Pritesh Doshi
Original Assignee
Schaeffler Technologies AG & Co. KG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Schaeffler Technologies AG & Co. KG filed Critical Schaeffler Technologies AG & Co. KG
Publication of WO2017080549A1 publication Critical patent/WO2017080549A1/fr

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
    • F16D41/067—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 and the members being distributed by a separate cage encircling the axis of rotation
    • 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
    • F16D41/061—Freewheels or freewheel clutches with intermediate wedging coupling members between an inner and an outer surface the intermediate members wedging by movement having an axial component

Definitions

  • the invention relates to a bidirectionally effective coupling for transmitting a rotational movement or a torque according to the preamble of claim 1.
  • CA 2 724 388 A1 discloses a bidirectionally operative coupling with a pair of coupling end elements and a coupling center element, wherein on each of the coupling elements V-shaped recesses are formed, which can engage with each other, and wherein an actuator is provided to engaging the V-shaped recesses of the coupling end members with the V-shaped recesses of the coupling member.
  • a bidirectional coupling with staggered roller elements with at least two coupling rings is known, each of the coupling rings having a peripheral surface and a recess.
  • the coupling rings form a channel, wherein in the channel at least two roller elements are arranged.
  • the roller elements are urged against each other during a rotation of the coupling rings against the bearing surfaces of the coupling rings, that a torque or a rotational movement can be transmitted.
  • a disadvantage of the known solutions is that the clutch can not be brought into a freewheeling position in a coupled, blocked state for transmitting a torque in a fixed direction without turning the clutch a piece against the specified direction of rotation and thus unlock.
  • it is desirable to overcome this because otherwise a driver must always roll backwards when approaching a grade to release the locked state of the clutch.
  • the object of the invention is to develop a bidirectionally effective coupling such that the clutch can be brought into a freewheeling position even when engaged, blocked state, without a reversal of the direction of rotation is necessary.
  • the object is achieved by a coupling with an outer coupling ring and an inner coupling ring, wherein the outer coupling ring and the inner coupling ring are arranged coaxially to each other, wherein between the outer coupling ring and the inner coupling ring an annular gap is formed, wherein in the annular gap clamping body for transmission a torque between the outer coupling ring and the inner coupling ring are arranged, and wherein the inner coupling ring is designed as a slotted or split ring, wherein a diameter of the inner coupling ring along the pitch or the slot is variable.
  • a coupling ring can be represented, which can change its diameter reversibly by elastic deformation and thus is suitable for adjusting the diameter.
  • the inner coupling ring is conical in the axial direction of the coupling.
  • a conical design can be changed by a simple translational movement of the inner coupling ring in the axial direction of the diameter of the inner coupling ring and thus locked and unlocked the clutch accordingly.
  • the inner coupling ring is displaceable by an electro-mechanical or an electro-hydraulic adjuster.
  • an electromechanical or electrohydraulic phaser By means of an electromechanical or electrohydraulic phaser, a force necessary for the adjustment can be applied in a simple manner and an at least partially automated actuation of the clutch can be realized.
  • the coupling can be used as an electromechanical locking differential.
  • the slot is formed in the inner coupling ring Z-shaped or rising.
  • a mandrel is provided, which is in operative connection with the inner coupling ring, wherein the mandrel is mounted on tapered rollers in the inner coupling ring.
  • the clamping bodies are designed as balls or cylindrical rollers. This allows a simple rolling of the clamping body on the coupling rings, which reduces the wear of the clutch. Cylindrical rollers are to be preferred in terms of their carrying capacity balls, since the cylindrical rollers have an approximately linear contact surface with the coupling rings perpendicular to the annular gap and thus can transmit greater forces and moments than balls, which have approximately punctiform contact surfaces with the coupling rings.
  • the clamping body are arranged at uniform intervals over the circumference of the coupling rings to accommodate in all mounting positions an equal load.
  • recesses for receiving the clamping body are formed on the outer coupling ring.
  • the recesses are provided on the inner coupling ring or on both coupling rings, but the outer coupling ring is not weakened by a slot, thus considerably more rigid and thus easier to machine than the inner coupling ring. It is particularly advantageous if the recesses extend the width of the annular gap such that the annular gap is wider than a diameter of the clamping body at least at a bottom of the recesses.
  • a freewheel in the clutch can be realized in a simple manner, wherein the clamping body come into contact with ramps of the recesses in a rotation of the outer coupling ring to the inner coupling ring and thus enable a transmission of torque.
  • the clamping body are held by a cage in the annular gap. As a result, it can be prevented that the clamping bodies fall out of the coupling during an axial displacement of the inner coupling ring and / or a reduction in the diameter of the inner coupling ring. Thus, the clamp body are secured against falling out of the clutch.
  • Fig. 1 shows a first embodiment of a coupling according to the invention
  • 2 shows a coupling according to the invention in a blocking position during a clockwise rotation
  • FIG. 3 shows a coupling according to the invention in a blocking position during a counterclockwise rotation
  • Fig. 4 shows another embodiment of a coupling according to the invention.
  • a coupling 1 for transmitting a rotary motion or a torque is shown.
  • the coupling 1 has an outer coupling ring 2 and an inner coupling ring 3, wherein the outer coupling ring 2 and the inner coupling ring 3 are arranged coaxially with each other. Between the outer coupling ring 2 and the inner coupling ring 3, an annular gap 4 is formed.
  • clamping body 5 for transmitting torque between the outer coupling ring 2 and the inner coupling ring 3 are arranged.
  • the clamping body 5 are preferably formed as cylindrical rollers 10, but may also have a different shape and be formed, for example, as balls.
  • the inner coupling ring 3 is designed as a split or slotted coupling ring, wherein a diameter of the inner coupling ring 3 along a pitch 6 or a Schlit- 7 is variable and thus variable.
  • the inner coupling ring 3 is conically formed in the axial direction, so that the slot 7 in the inner coupling ring 3 closes with an axial displacement in the direction of the narrower side and thus the diameter of the inner coupling ring 3 is reduced with a displacement of the conically converging boundary. Accordingly, the inner coupling ring 3 opens along the slot 7, when it is displaced in the direction of the conical opening, so that a bearing for the clamping body 5 diameter of the inner coupling ring 3 increases.
  • adjuster For displacement of the inner coupling ring 3 is a, not shown in the drawings for reasons of clarity, adjuster provided, which is preferably designed as an electromechanical adjuster or elec- rohydraulischer phaser. By such a stage, it is possible to apply in a compact design necessary for the displacement of the inner coupling ring 3 forces and an at least partially automated switching of To enable clutch 1.
  • the slot 7 is Z-shaped, which prevents the clamping body 5 completely rest in the slot 7 and thus can lead to jamming of the coupling 1. Due to the Z-shape, the cylindrical rollers 10 are in each case on an unslotted surface of the inner coupling ring 3.
  • the slot 7 may be formed circumferentially rising, whereby also a penetration of the cylindrical rollers 10 is prevented in the slot 7.
  • an inner coupling ring 3 with a slot 7 it is also possible to provide a split inner coupling ring 3, that is to say a coupling ring with two or more slots 7, which are bent in the manner of a spring plate and thus are pressed outwards. Also in this embodiment can be caused by an axial displacement against a conical surface that reduces the diameter of the inner coupling ring 3 or expanded.
  • a mandrel 8 is provided, which is inserted into the inner coupling ring 3 and has a conical shape.
  • the mandrel 8 is displaced in the axial direction by the adjuster, wherein it leads by the conical shape of the mandrel 8 to a spreading of the inner coupling ring 3 and thus to an increase in the diameter of the inner coupling ring 3.
  • the clutch 1 can be opened or closed.
  • the annular gap 4 between the inner coupling ring 3 and the outer coupling ring 2 is narrower than a diameter of the clamping bodies 5.
  • recesses 11 are provided which increase the width of the annular gap 4 in such a way that that the annular gap 4 at least at a base 12 of the recesses 1 1 is wider than the diameter of the clamping body 5.
  • the clamping body 5 are in a starting position respectively at the bottom 12 of the recesses 1 1, so that the clamping body 5 from the inner coupling ring 3 in This starting position are spaced.
  • a rotation of the outer coupling ring 2 relative to the inner coupling ring 3 is shown in a clockwise direction.
  • the clamping body 5 travel along ramps of the recesses 1 1 in the direction of the inner coupling ring 3, until it comes to rest the clamping body 5 on the inner coupling ring 3 and thus a power transmission or torque transmission is possible.
  • the coupling 1 can be switched to a freewheeling position.
  • the clamping bodies 5 lose contact with the inner coupling ring 3 and / or the outer coupling ring 2 and are held in their position by a cage 13.
  • FIG. 3 a further switching position of the clutch is shown, in which the outer coupling ring 2 was rotated counterclockwise to the inner coupling ring 3.
  • the clamping body 5 starting from a position on the base 12 of the recesses 1 1 along the respective ramps of the recess 1 1 in the direction of the inner coupling ring 3, until the clamping body 5 abut the inner coupling ring 3.
  • the extension and reduction of the diameter of the inner coupling ring 3 and the associated locking and unlocking of the coupling 1 takes place analogously to the explanations for FIG. 2.
  • FIG. 4 a further embodiment of a coupling 1 according to the invention is shown.
  • chen applications in a closed or locked state of the coupling 1 should be necessary to allow relative rotation between the mandrel 8 and / or the inner coupling ring 3 and the outer coupling ring 2, between the inner coupling ring 3 and the mandrel tapered rollers 9 angeord- be net, via which the mandrel 8 is mounted in the inner coupling ring 3.
  • the tapered rollers 9 allow a rotation of the mandrel 8 relative to the inner coupling ring 3 and thus can expand the possible applications for a coupling 1 according to the invention.
  • Bidirectionally effective clutches 1 according to the invention are preferably used in the automotive industry and can be used, for example, for torque transmission in a shiftable four-wheel drive. Another preferred application of such a clutch 1 is the use in a limited slip differential or for speed synchronization in a manual transmission. Furthermore, a Hill Start Assist can be realized by a clutch 1 according to the invention, since to unlock the clutch 1, a reversal of motion necessary for the adhesion between the outer clutch ring 2 and the inner clutch ring 3 rotational movement is no longer necessary.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mechanical Operated Clutches (AREA)

Abstract

L'invention concerne un accouplement (1), comprenant un anneau d'accouplement extérieur (2) et un anneau d'accouplement intérieur (3). L'anneau d'accouplement extérieur (2) et l'anneau d'accouplement intérieur (3) sont disposés de manière coaxiale l'un par rapport à l'autre. Un interstice annulaire (4) est formé entre l'anneau d'accouplement extérieur (2) et l'anneau d'accouplement intérieur (3). Des corps de serrage destinés à la transmission d'un couple entre l'anneau d'accouplement extérieur (2) et l'anneau d'accouplement intérieur (3) sont disposés dans l'interstice annulaire (4), et l'anneau d'accouplement intérieur (3) est réalisé sous la forme d'un anneau divisé ou fendu. Un diamètre de l'anneau d'accouplement intérieur (3) le long de la division (6) ou de la fente (7) est variable.
PCT/DE2016/200485 2015-11-12 2016-10-24 Accouplement à action bidirectionnelle WO2017080549A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102015222302.7 2015-11-12
DE102015222302 2015-11-12

Publications (1)

Publication Number Publication Date
WO2017080549A1 true WO2017080549A1 (fr) 2017-05-18

Family

ID=57321048

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE2016/200485 WO2017080549A1 (fr) 2015-11-12 2016-10-24 Accouplement à action bidirectionnelle

Country Status (2)

Country Link
DE (1) DE102016222174A1 (fr)
WO (1) WO2017080549A1 (fr)

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1129235A (en) * 1966-06-17 1968-10-02 Dana Corp Clutch
DE6918379U (de) * 1969-05-06 1969-10-02 Koyo Seiko Company Ltd Freilaufkupplung
WO1993000523A1 (fr) * 1991-06-20 1993-01-07 Hybo Science, Inc. Embrayage du type a double hyperboloide
DE19805211A1 (de) * 1998-02-10 1999-08-12 Schaeffler Waelzlager Ohg Spannvorrichtung zum Verbinden zweier umeinander angeordneter Bauteile
US20040003976A1 (en) * 2002-07-03 2004-01-08 Pederson Jack E. Clutch having elements capable of independent operation
CA2724388A1 (fr) 2008-05-15 2009-11-19 Ker-Train Holdings Ltd. Accouplement a rainures en v concentriques
DE102009037618A1 (de) 2009-07-02 2011-01-05 Schaeffler Technologies Gmbh & Co. Kg Bidirektionale Kupplung mit gestaffelten Rollenelementen
DE102012217927A1 (de) * 2012-10-01 2014-04-03 Schaeffler Technologies Gmbh & Co. Kg Freilauf

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1129235A (en) * 1966-06-17 1968-10-02 Dana Corp Clutch
DE6918379U (de) * 1969-05-06 1969-10-02 Koyo Seiko Company Ltd Freilaufkupplung
WO1993000523A1 (fr) * 1991-06-20 1993-01-07 Hybo Science, Inc. Embrayage du type a double hyperboloide
DE19805211A1 (de) * 1998-02-10 1999-08-12 Schaeffler Waelzlager Ohg Spannvorrichtung zum Verbinden zweier umeinander angeordneter Bauteile
US20040003976A1 (en) * 2002-07-03 2004-01-08 Pederson Jack E. Clutch having elements capable of independent operation
CA2724388A1 (fr) 2008-05-15 2009-11-19 Ker-Train Holdings Ltd. Accouplement a rainures en v concentriques
DE102009037618A1 (de) 2009-07-02 2011-01-05 Schaeffler Technologies Gmbh & Co. Kg Bidirektionale Kupplung mit gestaffelten Rollenelementen
DE102012217927A1 (de) * 2012-10-01 2014-04-03 Schaeffler Technologies Gmbh & Co. Kg Freilauf

Also Published As

Publication number Publication date
DE102016222174A1 (de) 2017-05-18

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