WO2009109255A2 - Unité de précontrainte - Google Patents

Unité de précontrainte Download PDF

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Publication number
WO2009109255A2
WO2009109255A2 PCT/EP2008/067701 EP2008067701W WO2009109255A2 WO 2009109255 A2 WO2009109255 A2 WO 2009109255A2 EP 2008067701 W EP2008067701 W EP 2008067701W WO 2009109255 A2 WO2009109255 A2 WO 2009109255A2
Authority
WO
WIPO (PCT)
Prior art keywords
ramp
discs
unit
biasing unit
disc
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
Application number
PCT/EP2008/067701
Other languages
German (de)
English (en)
Other versions
WO2009109255A3 (fr
Inventor
Ramon Jurjanz
Norbert Radinger
Tomas Smetana
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
IHO Holding GmbH and Co KG
Original Assignee
Schaeffler 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 KG filed Critical Schaeffler KG
Publication of WO2009109255A2 publication Critical patent/WO2009109255A2/fr
Publication of WO2009109255A3 publication Critical patent/WO2009109255A3/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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
    • F16D23/00—Details of mechanically-actuated clutches not specific for one distinct type
    • F16D23/12—Mechanical clutch-actuating mechanisms arranged outside the clutch as such
    • 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
    • F16D23/00—Details of mechanically-actuated clutches not specific for one distinct type
    • F16D23/12—Mechanical clutch-actuating mechanisms arranged outside the clutch as such
    • F16D2023/123—Clutch actuation by cams, ramps or ball-screw mechanisms
    • 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
    • F16D27/00—Magnetically- or electrically- actuated clutches; Control or electric circuits therefor
    • F16D27/004—Magnetically- or electrically- actuated clutches; Control or electric circuits therefor with permanent magnets combined with electromagnets

Definitions

  • the invention relates to a biasing unit.
  • the invention relates to a biasing unit, which is constructed from a first and a second ramp disc, of which each ramp disc has formed ramp contours.
  • Each ramp contour includes a first ramp and a second ramp.
  • a rolling element is arranged such that, in the biasing unit, by pivoting at least one of the two ramp discs relative to the other ramp disc, the rolling elements move up and / or down the ramp contours.
  • Such biasing units are used in transmissions of motor vehicles, in particular to enable the actuation of a friction clutch in the drive train of a motor vehicle.
  • German Patent DE 10 2005 053 555 B3 discloses an axial adjustment device in the form of a ball ramp arrangement.
  • the Axialverstellvorrich- device comprises two disks centered on a common axis, one of which is axially supported and the other is axially displaceable and of which at least one is rotatably driven.
  • the two discs each have on their mutually facing end faces on an equal plurality of circumferentially extending ball grooves. The two discs are thus stored with balls as rolling elements.
  • the LJ. S. Patent 5,485,904 also discloses a bias unit, the ren rappen slices are arranged by means of balls as rolling elements against each other rotatable.
  • U.S. Patent 5,620,072 discloses a biasing unit for a multi-plate clutch whose ramp discs are also arranged against each other rotatable with balls as Wälzkör- per.
  • FIG. 1 shows schematically the application of a biasing unit 1 according to the prior art.
  • a bias unit 1 finds z.
  • essentially consists of a housing 60 in which a second multi-plate clutch 54, a first multi-plate clutch 52 and the biasing unit 1 according to the Prior art is arranged.
  • the housing 60 of the four-wheel drive circuit has a transmission input shaft 56 and a transmission output shaft 58.
  • the pretensioning unit 1 comprises a first ramp disk 2 and a second ramp disk 5. Between the two ramp disks 2 and 5 there are between 5 and 6 balls, which are the rolling elements 3 represent.
  • Respective ramps 9 and 10 (not shown in FIG. 1) or ramp contours 8 (not shown in FIG. 1) are formed in the ramp discs 2 and 5, in which the rolling elements 3 roll.
  • the ramps 9, 10 are formed obliquely, which causes a low-friction displacement of the two ramp discs 2, 5 in the direction of the axis 50. With the displacement of the two ramp discs 2 and 5 thus a stroke in the axial direction can be achieved.
  • One of the ramp discs 2 or 5 can be switched electromagnetically by means of the first multi-plate clutch 52.
  • FIG. 2 shows a schematic representation of a bias unit 1, as it is known from the prior art.
  • the biasing unit 1 consists of a first ramp disc 2 and a second ramp disc 5. Between the two ramp discs 2 and 5, between 5 and 6 rolling elements 3 are provided.
  • the rolling elements 3 of the prior art are formed as balls.
  • a thrust washer 7 connects, which is mounted opposite the second ramp disc 5 with a thrust bearing 6.
  • German Patent DE 10 2004 015 271 B4 discloses a torque transmission device.
  • the rolling elements and the thrust bearing are mounted on a pitch circle, which has the same diameter.
  • rolling elements balls are used as rolling elements balls.
  • An axial preload unit is also used in the bevel gear differentials for preloading of multi-plate clutches of the overlay stages.
  • the second ramp plate 5 is provided with an internal toothing and is connected to the transmission output shaft 58 and thus to the rear axle (not shown).
  • the second multi-plate clutch 54 Between the transmission input shaft 56 and the transmission output shaft 58 is the second multi-plate clutch 54.
  • the ramp discs 2 and 5 of the bias unit 1 rotate relative to each other.
  • the resulting normal force actuates the second multi-plate clutch 54.
  • the torque can thus be transmitted from the transmission to the rear axle.
  • the lamellae of the bias unit 1 can be switched off electromagnetically. The drive takes place in the case only on the front wheels of the motor vehicle.
  • the ramp contours 8 are massively shaped in the case of the ramp discs 2, 5 according to the prior art, so that the side of the annular surface of the ramp discs 2, 5 faces away from the ramp contours 8 is completely in contact with each adjacent elements 79 of the respective ramp discs 2, 5 occurs.
  • the invention has for its object to provide a cost-effective and weight-reduced biasing unit.
  • the above object is achieved by a bias unit comprising the features of claim 1.
  • the biasing unit according to the invention comprises a first ramp disc and a second ramp disc. Both ramp discs have formed a plurality of ramp contours in one side of an annular surface of the ramp discs. Each ramp contour comprises a first ramp and a second ramp. It is particularly advantageous from the point of view of the introduction of force that at least three and at most five rolling bodies are distributed between the two ramp discs. According to the rolling elements provided between the ramp discs, the ramp contours are formed in the ramp discs themselves. In the biasing unit, the rolling element rises and / or falls by pivoting at least one of the two ramp discs relative to the other ramp disc at the ramp contours. Thus one achieves an axial stroke between the two ramp discs.
  • the rolling elements may be, for example, according to the prior art balls or rollers. However, this should not be construed as a limitation of the invention, because the invention is conceivable with various other known from the prior art rolling elements.
  • each rolling element in particular rollers, are arranged distributed equally between the ramp discs. If the rolling elements are arranged distributed equally, the individual rolling elements to each other at an angular distance of 120 °.
  • Each of the two ramp discs has each formed three ramp contours. For each rolling element a ramp contour is provided in each case. The ramp contours are each formed from the two ramps.
  • the ramp contours, the rolling elements and an angle, under which the ramps are arranged are tuned such that at a certain maximum angle of rotation between the two ramps.
  • the preload unit reaches a maximum movement of 5.5 mm in an axial direction.
  • the ramp contour formed by the two ramps has a triangular cross-section.
  • the ramp discs are inventively designed such that between see the side of the annular surface of the ramp discs, which faces away from the ramp contours, and the adjacent elements of the respective ramp discs a plurality of cavities are formed. Due to the cavities, less material is needed to make the ramp discs so that the production of such ramp discs is less expensive compared to that of the prior art. Another advantage is that, due to the material saving, the ramp discs have a lower weight in comparison to ramp discs of the prior art.
  • the ramp discs can z. B. be made of a strip material made of sheet metal.
  • rollers as rolling elements allows the use of thin-walled ramp discs, in particular of ramp discs with the cavities described above. A high bending strength of the discs is no longer necessary when using rollers.
  • the ramps each have an initial contact point and an end contact point, so that the ramps touch the respective adjacent elements only via the respective contact points.
  • the ramps therefore each comprise only two contact points at which they are in contact with the respectively adjacent element.
  • more than two contact points may also be provided for the ramps at which the ramps contact the adjacent element.
  • at least two contact points are always required to allow a stable contact between the respective ramp and the respective adjacent element.
  • the end contact point is formed at the lowest point of the ramp contour.
  • the contact points for example, formed point-like or linear be. However, this should not be construed as limiting the invention, since the invention is also conceivable with other forms of contact points.
  • those sides of the annular surface of the ramp discs that have not formed ramp contours may have multiple contact surfaces.
  • the contact surfaces adjoin the ramp contours and are in contact with the respective adjacent element.
  • the contact surfaces lie on the entire surface of the respectively adjacent element, so that via the contact surfaces, a load transfer from the biasing unit takes place in the respective adjacent element.
  • the biasing unit comprises a cage for holding the rolling elements, wherein the cage holds the ramp discs and the rolling elements positively against each other.
  • the cage for holding the rolling elements against the at least one ramp disc is rotatable pivotable.
  • the two ramp disks can be produced as cold-formed components from a sheet-metal blank.
  • the ramp contours, the contact surfaces, the end contact point and the initial contact point are formed.
  • the components of the first and second ramp should be hardened at least on the raceway for the rolling elements.
  • Cold-formable 16MnCr5 steel has proven advantageous as a material of the sheet metal blanks, and a cold-formable steel of the "C45" type is also an advantage as the material of the sheet metal blanks, and the deformed sheet metal blanks must be hardened prior to mechanical loading in the preloading unit ,
  • a cold-formable steel of the "C45" type is also an advantage as the material of the sheet metal blanks, and the deformed sheet metal blanks must be hardened prior to mechanical loading in the preloading unit .
  • the components of the biasing unit are preassembled
  • the biasing unit may comprise a thrust bearing and a thrust washer as a preassembled unit, wherein the thrust bearing adjoins the second ramp disc and represents the adjacent element for the second ramp disc.
  • Figure 1 shows a schematic representation of the use of a bias unit in an Aliradsclien
  • Figure 2 shows a schematic representation of the embodiment of a bias unit according to the prior art
  • Figure 3 shows a schematic representation of the forces acting in the biasing unit when it is actuated
  • FIG. 4 shows an exploded view of the prestressing unit according to the prior art
  • Figure 5 shows a side view of the prior art pretensioner with the rollers between the two ramp discs at the lowest point of the ramp contour
  • FIG. 6 shows a schematic side view of the pretensioning unit according to the prior art, wherein at least one of the two
  • Ramp discs are twisted against each other, so that between the first ramp disc and the second ramp disc
  • Figure 7 shows a schematic representation of the embodiment of a biasing unit according to the invention.
  • Figure 8 shows a perspective view of the biasing unit according to the invention, wherein the rolling elements are located between the two ramp discs at the lowest point of the ramp contour;
  • FIG. 9 shows a perspective view of the pretensioning unit, wherein at least one of the two ramp disks is rotated relative to one another such that there is a stroke in the direction of the axis between the first ramp disk and the second ramp disk.
  • biasing unit 1 refers to the use of three rollers as rolling elements 3 between the ramp discs 2, 5, this should not be construed as limiting the invention. As can already be seen from the preceding description, three to five rollers can be arranged between the first and the second ramp discs 2, 5. It should also be noted that the same reference numerals are used in the various figures for the same elements.
  • FIG. 3 shows a schematic representation of the forces acting when the first ramp disc 2 is rotated relative to the second ramp disc 5.
  • the first ramp disc 2 and the second ramp disc 5 each have a ramp contour 8.
  • the ramp contour 8 consists of a first ramp 9 and a second ramp 10.
  • the two ramps 9, 10 are inclined by an angle ⁇ .
  • Equation 2 The tangential force F ⁇ can be calculated from Equation 2.
  • F ⁇ F N2 * ( ⁇ * cos ⁇ + sin ⁇ ) / cos ⁇ (Equation 2)
  • T BC F T * (D m / 2) (Equation 4)
  • D m is the pitch circle diameter
  • ⁇ is the angle at which the ramps 9 and 10 are inclined
  • h is the axial stroke that can be achieved by rotating the ramp disks 2 and 5 relative to each other
  • C DC is a parameter for the stiffness of the multi-plate clutch used
  • ⁇ is the friction coefficient.
  • FIG. 4 shows a perspective view of the exploded view of the biasing unit 1 according to the prior art.
  • the biasing unit 1 consists essentially of a first ramp disc 2, a cage 4 and a second ramp disc 5.
  • a cage 4 a thrust bearing 6 and a thrust washer 7 are provided.
  • the rolling bearings 3 are formed as rollers, which are held in designated pockets 16.
  • the second ramp plate 5 connects.
  • the upper side 5a of the second ramp disc 5, which has not embossed ramps 9, 10 abuts against the thrust bearing 6.
  • At the thrust bearing 6 adjoins the thrust washer 7.
  • each of the ramp contours 8 consists of a first ramp 9 and a second ramp 10.
  • the first Ram disk 2 inside a toothing 11, which provides a torque-fixed engagement in a transmission shaft, not shown.
  • the first ramp disc 2 is preferably made of a sheet metal blank or punching embossed part, which is produced by cold forming.
  • the cage 4 consists essentially of a radial disc 12, from which a first retaining tabs 13 and a second retaining tabs 14 are formed.
  • the first retaining tabs 13 and the second retaining tabs 14 are substantially perpendicular from the radial disc 12.
  • the pockets 16 are formed according to the number of rollers or rolling elements 3, in which the rollers are supported.
  • the second ramp disc 5 has a radial flange 18, which is integrally connected to an axially extending sleeve 19. Alternatively, sleeve 19 and radial flange 18 are interconnected components. At the radial flange 18 a plurality of ramps 8 are also formed.
  • the sleeve 19 is toothed for the torque-fixed but axially displaceable engagement with a shaft not shown.
  • a toothing 20 is formed of wave-shaped metal sheet.
  • the second ramp disc 5 is optionally a pull-stamping stamping component from a forged or sheet metal blank. Alternatively, the second ramp disc 5 can be extruded from the aforementioned blanks. As already described, the second ramp disk 5 is adjoined by the axial bearing 6.
  • the thrust washer 7 connects.
  • the thrust washer 7 is preferably a stamped-stamping component and has inside as well as outside a toothing 25 for torque-resistant connections.
  • Torque-resistant connections are preferably positive connections with which torques about the axis of rotation of the components can be transmitted. WEI terhin, the thrust washer 7 on a top 7a a plurality of formations 26.
  • Figure 5 shows a side view of the biasing unit 1 according to the prior art.
  • the first ramp disc 2 and the second ramp disc 5 are in such a position relative to one another that the rolling element 3 is located at the respectively lowest point of the ramp contour 8. In this position, no axial stroke 74 occurs between the first ramp disc 2 and the second ramp disc 5.
  • the thrust washer 7 is secured axially to the sleeve 19 by a plurality of radial projections 30 at least after maximum axial stroke 74.
  • the projections 30 are made by plastic displacement of material from the sleeve 19.
  • Figure 6 shows the situation in which the first ramp plate 2 is rotated relative to the second ramp disc 5 against each other.
  • the rolling element 3 moves on the ramp contour 8 from the lowest point to another point on the ramp contour 8.
  • the rolling element 3 is thus in contact with the second ramp 10 of the two ramp discs 2 and 5.
  • an axial stroke 74 is established.
  • the rolling elements 3 are in the neutral position in the lowest point between the first ramp 9 and the second ramp 10 of each of the two ramp discs 2 and 5.
  • the ramp discs 2 and 5 together with the cage 4 and the rollers, and the thrust bearing 6 and the thrust washer 7 with external teeth are assembled as a unit and held captive in the unit by partial radial caulking 30 to each other. This allows the complete bias unit 1 transported without additional devices or to be assembled as one unit with the customer.
  • FIG. 7 shows a schematic representation of the embodiment of a bias unit 1 according to the invention, which essentially comprises a first ramp plate 2 and a second ramp plate 5.
  • Each ramp contour 8 of the ramp discs 2, 5 each comprise a first ramp 9 and a second ramp 10.
  • a rolling element 3 is arranged between the two ramp discs 2, 5 at the lowest point of the two ramp contours 8. In this position, no axial stroke 74 occurs between the first ramp disc 2 and the second ramp disc 5.
  • the two ramp contours 8 formed from the two ramps 9, 10 each have a triangular cross-section.
  • the ramp discs 2, 5 are inventively designed such that between the side of the surface of the ramp discs 2, 5, which faces away from the ramp contours 8, and the adjacent elements 79 of the respective ramp discs 2, 5 a plurality of cavities 78 are formed.
  • each of the ramps 9, 10 has an initial contact point 75 and an end contact point 76, so that the ramps 9, 10 touch the respectively adjacent elements 79 only via the respective contact points 75, 76.
  • the ramps 9, 10 of a single ramp contour 8 have a common end contact point 76.
  • the ramps 9, 10 thus comprise only two contact points 75, 76 at which they are in contact with the respectively adjacent element 79.
  • the end contact point 76 is formed at the lowest point of the ramp contour 8.
  • the sides of the ramp discs 2, 5, which have not formed ramp contours 8, have a plurality of contact surfaces 75.
  • the contact surfaces 75 adjoin the ramp contours 8 and are in contact with the respectively adjacent element 79.
  • FIG. 8 shows a perspective view of the biasing unit according to the invention 1.
  • the two ramp discs 2, 5 are substantially annular.
  • the first ramp disc 2 and the second ramp disc 5 are in such a position to each other that the rolling element 3 is located at the respective lowest point of the ramp contour 8. At this position, there is no axial h 74 74 between the first ramp disc 2 and the second ramp disc 5.
  • Each ramp contour 8 comprises a first ramp 9 and a second ramp 10.
  • the ramp discs 2, 5 are designed such that between the side of the annular surface of the ramp discs 2, 5, which faces away from the ramp contours 8, and the adjacent elements 79 of respective ramp discs 2, 5 a plurality of cavities 78 are formed.
  • an adjacent element 79 is shown only in the case of the second ramp disk 5, so that only the cavities 78 between the second ramp disk 5 and the adjacent element 79 can be represented.
  • the second ramp plate 5 adjacent element 79 is the thrust bearing. 6
  • the two ramps 9, 10 each have an initial contact point 75 and an end contact point 76, so that the two ramps 9, 10 touch the respectively adjacent elements 79 only via the respective contact points 75, 76.
  • the starting contact points 75 are located in the illustrated embodiment, respectively at the ends of the ramp contours 8, where the contact surfaces 77 connect.
  • the end contact point 76 is formed here at the lowest point of the respective ramp contour 8.
  • the contact surfaces 77 are each in full contact with the adjacent element 79.
  • a cage 4 for holding the rolling elements 3 holds at least the two ramp discs 2, 5 and the rolling elements 3 positively against each other.
  • each of the two ramp discs 2, 5 has formed a total of three ramp contours 8, which are arranged distributed equal.
  • Each of the ramp contours 8 has two ramps 9, 10 each. So there are three rolling elements 3 between the two ramp discs 2, 5 arranged evenly distributed, with only one rolling element 3 is shown to the situation and environment with respect to a Wälzève body 3 in detail.
  • FIG. 9 shows the pretensioning unit 1 according to FIG. 8, but in the situation in which the first ramp disc 2 is rotated relative to the second ramp disc 5 relative to one another.
  • the rolling element 3 moves on the ram contour 8 from the lowest point, the end contact point 76, to another point on the ramp contour 8.
  • the rolling element 3 thus rests against the second ramp 10 of the two ramp discs 2 and 5 on.
  • an axial stroke 74 is established.
  • the rolling elements 3 are in the neutral position in the lowest point between the first ramp 9 and the second ramp 10 of each of the two ramp discs 2 and 5.
  • Equation 5 describes well the advantageous properties of the biasing unit according to the invention, when 3 rolls are used as rolling elements.
  • T / (h * F N2 ) z / 4 ⁇ equation (5)
  • rollers and the needles 21 of the thrust bearing 6 in a direct axial Force flow 66 are arranged. This is only possible because the pitch circles 62, 64 for the arrangement of the rollers and the thrust bearing 6 have the same diameter.
  • the use of rollers makes it possible to use thin-walled (for example punched-out and embossed) ramp discs 2, 5. A high flexural strength of the ramp discs 2, 5 is no longer necessary when using rollers.
  • the static transfer capacity of rolls (especially when using three rolls) is about 30% higher than with the use of balls. This is true for rolls whose diameters have the same diameter as the balls of the prior art.
  • three rollers represent a particularly stable static case. When using three rollers can always be ensured that regardless of the diameter of the rollers is always a good contact of the rollers to the corresponding ramp contours 8 in the ramp discs 2, 5 guaranteed.
  • the larger the pitch circle diameter is selected the flatter the ramps 9, 10 can be configured. This in turn leads to an increase in the switching times of the four-wheel drive, if necessary.
  • a larger pitch diameter of the design with rollers automatically leads to the decrease of the tangential and contact forces. The elastic deflection of the rollers is less than with balls.
  • the cage 4 serves both for supporting the rollers, as well as the first ramp disc 2 and the second ramp disc 5.
  • the cage 4 is snapped onto the ramp discs 2 and 5 by means of the first and second lobes 13 and 14 with retaining lugs 15.
  • the first and second retaining lugs 13 and 14, and the retaining lugs 15 are designed such that they hold the unit axially, but a free rotation or axial displacement of the allow first and second ramp discs 2 and 5. Furthermore, it was considered in the design that no collision occurs to adjacent fins.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Rolling Contact Bearings (AREA)
  • Support Of The Bearing (AREA)

Abstract

Unité de précontrainte qui comporte un premier disque à rampes et un second disque à rampes. Les disques à rampes sont conçus de manière telle que plusieurs espaces creux sont ménagés entre le côté de la surface annulaire des disques à rampes qui ne comporte pas de rampes et les éléments voisins de chaque disque à rampes.
PCT/EP2008/067701 2008-02-29 2008-12-17 Unité de précontrainte Ceased WO2009109255A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102008011914.8A DE102008011914B4 (de) 2008-02-29 2008-02-29 Vorspanneinheit
DE102008011914.8 2008-02-29

Publications (2)

Publication Number Publication Date
WO2009109255A2 true WO2009109255A2 (fr) 2009-09-11
WO2009109255A3 WO2009109255A3 (fr) 2009-11-05

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2008/067701 Ceased WO2009109255A2 (fr) 2008-02-29 2008-12-17 Unité de précontrainte

Country Status (2)

Country Link
DE (1) DE102008011914B4 (fr)
WO (1) WO2009109255A2 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8627734B2 (en) 2008-04-15 2014-01-14 Schaeffler Technologies AG & Co. KG Prestressing unit
CN109210102A (zh) * 2017-07-05 2019-01-15 舍弗勒技术股份两合公司 斜坡执行器以及具有斜坡执行器的离合器装置
US10280987B2 (en) 2017-04-24 2019-05-07 Schaeffler Technologies AG & Co. KG Axial movement compensation of clutch actuation device
CN111425532A (zh) * 2019-01-10 2020-07-17 舍弗勒技术股份两合公司 具有带有保持架的斜坡机构的机械操纵系统

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011083047A1 (de) * 2011-09-20 2013-03-21 Schaeffler Technologies AG & Co. KG Axialverstelleinheit
DE102018124444B4 (de) * 2018-10-04 2025-08-14 Schaeffler Technologies AG & Co. KG Rampenaktuator und Schrägkugellagereinheit mit kaltumgeformtem Außenring und geprägter Rampenkontur sowie Verfahren zum Herstellen einer Rampenscheibe

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FR2623580B1 (fr) * 1987-11-25 1991-08-23 Valeo Dispositif de commande d'embrayage, notamment pour vehicules automobiles
US5485904A (en) 1994-01-31 1996-01-23 Eaton Corporation Clutch ball ramp actuator with drive and coast apply
US5620072A (en) 1995-02-03 1997-04-15 Borg-Warner Automotive, Inc. Transfer case having disc pack and cone clutch
US7083033B2 (en) 2003-03-27 2006-08-01 Tochigi Fuji Sangyo Kabushiki Kaisha Torque transmission apparatus
DE10348312A1 (de) 2003-10-17 2005-05-19 Zf Friedrichshafen Ag Betätigungseinrichtung für eine Reibungskupplungseinrichtung, ggf. Doppel- oder Mehrfach-Reibungskupplungseinrichtung
DE102005053555B3 (de) 2005-11-08 2007-08-02 Gkn Driveline International Gmbh Kugelrampenanordnung mit variabler Steigung der Kugelrillen
DE102006006640B3 (de) * 2006-02-14 2007-04-26 Zf Friedrichshafen Ag Umlenkgetriebe zur Betätigung einer Lamellenkupplung

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8627734B2 (en) 2008-04-15 2014-01-14 Schaeffler Technologies AG & Co. KG Prestressing unit
US10280987B2 (en) 2017-04-24 2019-05-07 Schaeffler Technologies AG & Co. KG Axial movement compensation of clutch actuation device
CN109210102A (zh) * 2017-07-05 2019-01-15 舍弗勒技术股份两合公司 斜坡执行器以及具有斜坡执行器的离合器装置
CN111425532A (zh) * 2019-01-10 2020-07-17 舍弗勒技术股份两合公司 具有带有保持架的斜坡机构的机械操纵系统

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Publication number Publication date
DE102008011914A1 (de) 2009-09-03
WO2009109255A3 (fr) 2009-11-05
DE102008011914B4 (de) 2019-01-31

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