WO2022199744A1 - Kolben für eine ausrückvorrichtung mit fixierung - Google Patents
Kolben für eine ausrückvorrichtung mit fixierung Download PDFInfo
- Publication number
- WO2022199744A1 WO2022199744A1 PCT/DE2022/100157 DE2022100157W WO2022199744A1 WO 2022199744 A1 WO2022199744 A1 WO 2022199744A1 DE 2022100157 W DE2022100157 W DE 2022100157W WO 2022199744 A1 WO2022199744 A1 WO 2022199744A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- piston
- release device
- longitudinal axis
- release
- lever
- 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
- 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
- F16D23/14—Clutch-actuating sleeves or bearings; Actuating members directly connected to clutch-actuating sleeves or bearings
-
- 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
- F16D25/00—Fluid-actuated clutches
- F16D25/08—Fluid-actuated clutches with fluid-actuated member not rotating with a clutching member
- F16D25/082—Fluid-actuated clutches with fluid-actuated member not rotating with a clutching member the line of action of the fluid-actuated members co-inciding with the axis of rotation
- F16D25/083—Actuators therefor
Definitions
- the invention relates to a piston for a release device for releasing a release bearing in hybrid drives and such a release device.
- Such release devices are used to separate an electric motor in a hybrid drive of a motor vehicle from an internal combustion engine. In practice, such release devices are used in a wet area of a clutch.
- a clutch release assembly is typically made up of a housing, piston, groove seals, O-rings, and release bearing with a shim.
- a concentric release device also known as a CSC (concentric slave cylinder)
- the pressure build-up moves the piston axially in the CSC housing and disengages a clutch.
- a release bearing which is coupled to the release device, transmits a rotational movement of a drive and has no fixed connection to the piston but a certain radial play. This is intended to compensate for radial tolerances between a clutch axis and a central axis of the release device (radial play compensation).
- the release bearing is therefore able to center itself on the clutch. Release bearings of this type are used in conventional motor vehicle drives at a release bearing speed of up to approximately 7000 rpm.
- release bearing speeds of up to 13,000 rpm can occur.
- Simulation calculations show that decentering of the release bearing starts at a release bearing speed >8000 rpm. This happens due to the centrifugal forces and due to the presence of an initial Ra dialversatzes the release bearing to the axis of rotation.
- the decentering of the release bearing leads to severe imbalance and at the same time to a relative radial movement between the release bearing and the clutch.
- the resulting relative movement introduces additional friction into the system and generates abrasion. All of this can lead to failure of the release device or release bearing.
- An additional disadvantage of a "loose" release bearing is that the release bearing can become detached from the piston during transport and assembly. It is an object of the invention to provide a piston for a release device which at least partially reduces the disadvantages mentioned above. Another object is to specify a release device with such a piston.
- the piston for a release device for disengaging a release bearing has a body which is formed around a longitudinal axis L and has a projection which projects radially inwards with respect to the longitudinal axis L, with an axial end of the projection forming a bearing surface and with one or more snap hooks protruding from the body of the plunger adjacent the abutment surface, radially resiliently movable with respect to the longitudinal axis L.
- the one or more snap hooks extend out of a plane that is spanned by the contact surface.
- the plane can extend perpendicularly to the longitudinal axis L substantially.
- the body of the piston is therefore a ring body around the longitudinal axis L. If the expressions “radial” or “axial” are used in the following, these terms always refer to the direction of the longitudinal axis L.
- a release bearing When using the piston in a release device, a release bearing can be fixed to the piston using at least one snap hook. Because of the spring mobility of the snap hook or the snap hook, a preload is exerted in the radial direction on the release bearing. The one or more snap hooks thus enable a reduction or even elimination of radial play between the release bearing and the piston when the piston is used in a release device. In this way, a decentering of the release bearing at high speeds is prevented or at least reduced and thus a strong balance and friction are avoided.
- Another advantage of the piston according to the invention is that although the release bearing is no longer finally centered on the clutch, which initially leads to more self-heating at low speeds, it prevents decentering of the release bearing at high speeds and thus becomes strong imbalance and friction are avoided.
- the or each snap hook has an arm and a nose formed on a free end of the arm.
- the arm is elastically or resiliently bendable, so that it exerts radial pressure on the release bearing when that is used in the release device.
- the lug prevents the release bearing from deflecting in the axial direction.
- the snap hook or hooks can, for example, be formed in one piece with the body.
- the spring force of the arm is ensured by a suitable choice of material, for example a plastic or aluminum.
- a separate design of the snap hook and a spring-elastic attachment to the body of the piston is also possible.
- the snap hook is preferably selected in such a way that the arm of the snap hook extends parallel to the longitudinal axis L in a relaxed state.
- the expression "in a relaxed state” means a state in which no force is applied to the snap hook to elastically deflect the arm.
- three snap hooks are arranged at equal circumferential intervals on the body of the piston.
- the snap hooks thus exert pressure symmetrically in the circumferential direction on an inserted rear bearing.
- the invention also relates to a release device which has a piston, as described above, a housing with an interior space in which the piston is accommodated so that it can be displaced in the axial direction with respect to the longitudinal axis L, and a release bearing which is operatively connected to the piston stands, has.
- the release bearing is fixed to the piston by the snap hook or snap hooks.
- the Ausschla ger or each release bearing comprises a lever which supports a ball of the release bearing with a first end and is superimposed with a second end on the piston ge.
- the lever is thus tensioned in the radial direction by the snap hook between the ball and the piston.
- the lever is kept pressed against the contact surface in the axial direction.
- the second end of the lever may be supported on the projection of the body of the piston.
- the second end of the lever can be pressed by the snap hook against the contact surface of the projection, with a shim disk being placed between the second end of the lever and the contact surface of the projection.
- the arm of the snap hook preferably covers the second end of the lever radially on the outside. In other words, the arm forms a radially outer limit for the second end of the lever.
- Figure 1 is a cross-sectional view of a prior art release bearing
- FIG. 1a shows an enlarged view of a detail from FIG. 1 in a perspective representation
- FIG. 2a shows a detailed view of the release bearing from FIG. 1 in a schematic representation in cross section
- FIG. 2b shows a detailed view of an embodiment of the invention in a schematic representation in cross section.
- a release device is identified by the reference numeral 1 in a cross-sectional view.
- the release device 1 is shown here as part of a clutch.
- the release device 1 comprises a piston 10 which is accommodated in a housing 20 in such a way that it is movable in the axial direction, i.e. parallel to a longitudinal axis L of the device 1.
- the release device 1 includes a release bearing 50, which is designed here as a ball bearing.
- the piston 10 has a body 11 which rings in the housing 20 with two groove sealing 30 relative to a fluid chamber 21 of the housing 20 is sealed.
- the Kör by 11 of the piston 10 has a projection 12 which extends from the body 11 from ra dial inwards.
- the projection 12 forms a contact surface 12a at an end opposite the fluid chamber 21 in the axial direction.
- the contact surface 12a serves to support a lever 51 of the release bearing 50 radially on the outside.
- the lever 51 has a first end 51a which is radially inward and a second end 51b which is radially outward. While the first end 51a rests against a ball 52 of the release bearing 50, the second end 51b is supported on the contact surface 12a, with a shim disk 40 being set between the second end 51b and the contact surface 12a.
- the shim disk 40 which is also referred to as the contact disk, is placed between the contact surface 12a and the second end 51b of the lever 51.
- the second end 51b of the lever 51 rests against a contact surface 11a of the body 11 of the piston 10, with a radial play 15 between the contact surface 11a of the body and the second end 51b of the lever 51.
- FIG. 2b a piston 10 and a release device 1 according to an embodiment of the present invention are explained in more detail.
- the body 11 of the piston 10 is similar to that of the prior art.
- the radial projection 12 of the body is also present in the embodiment according to the invention, and an axial side surface (in the representation of FIG. more precisely expressed in this embodiment for the shim disk 40, on which in turn the second end 51b of the lever 51 rests.
- the lever 51 is also part of the release bearing 50, which can be formed as a ball bearing, as shown in this illustration.
- the first end 51a of the lever 51 is mounted on the ball 52 for this purpose.
- the first end 51a is concave radially on the inside, the concavity being shaped in accordance with a curvature of the ball 52 .
- the piston 10 here has one or more snap hooks 13, from the body 11 of the piston 10 adjacent to the contact surface 12a with respect to the longitudinal axis L, radially spring-movable, stand.
- the term “radially spring-movable” means here that the snap hook 13 can be elastically bent in the radial direction, ie radially outwards and/or radially inwards.
- the snap hook 13 can in particular, as shown here, be formed in one piece with the body 11 of the piston 10, for example formed from plastic in an injection molding process. In principle, however, it is also possible to form the snap hook 13 as a separate element and to strengthen the body 11 to be.
- the snap hook 13 is preferably, as shown here, formed on the axial side surface of the projection 12, here in the picture on the left axial side surface following the contact surface 12a in the radial direction on the outside.
- the snap hook 13 has an arm 13a which is provided with a nose 13c at a free end 13b, i.e. at that end which is remote from the radial projection 12.
- the nose 13c projects radially inwards from the free end 13b of the arm 13a in order to fulfill its purpose.
- the second end 51b of the lever 51 of the release bearing 50 can be clamped between the nose 13c and the contact surface 12a of the radial projection 12 of the piston 10 or the shim disk 40 resting on the contact surface 12a.
- the snap hook 13 Since the snap hook 13, as already mentioned, is elastically resilient in the radial direction, it exerts a spring force on the second end 51b of the lever 51 of the release bearing 50 in the radial direction inwards. There is a gap 14 between the arm 13a and the contact surface 11a of the body 11 of the piston 10, so that the snap hook 13 can be pressed radially outwards, for example during assembly.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Mechanical Operated Clutches (AREA)
Abstract
Description
Claims
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE112022001677.9T DE112022001677A5 (de) | 2021-03-24 | 2022-02-25 | Kolben für eine Ausrückvorrichtung mit Fixierung |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102021107288.3 | 2021-03-24 | ||
| DE102021107288 | 2021-03-24 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2022199744A1 true WO2022199744A1 (de) | 2022-09-29 |
Family
ID=80682572
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/DE2022/100157 Ceased WO2022199744A1 (de) | 2021-03-24 | 2022-02-25 | Kolben für eine ausrückvorrichtung mit fixierung |
Country Status (2)
| Country | Link |
|---|---|
| DE (1) | DE112022001677A5 (de) |
| WO (1) | WO2022199744A1 (de) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102023132057A1 (de) * | 2023-11-17 | 2025-05-22 | Schaeffler Technologies AG & Co. KG | Geführtes Ausrücklager und Ausrückvorrichtung sowie Kupplungsvorrichtung mit geführtem Ausrücklager |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102012201674A1 (de) * | 2011-02-24 | 2012-08-30 | Schaeffler Technologies AG & Co. KG | Ausrücksystem zur hydraulischen Betätigung einer Kupplung |
| WO2017194056A1 (de) * | 2016-05-11 | 2017-11-16 | Schaeffler Technologies AG & Co. KG | Nehmerzylinder für eine betätigungseinrichtung einer reibkupplung |
| DE102018102450A1 (de) * | 2018-02-05 | 2019-08-08 | Schaeffler Technologies AG & Co. KG | Betätigungsanordnung mit durch schraubenlose Verbindung gefügtem und zentriertem Gehäuse eines Nehmerzylinders; sowie Kupplungssystem |
-
2022
- 2022-02-25 WO PCT/DE2022/100157 patent/WO2022199744A1/de not_active Ceased
- 2022-02-25 DE DE112022001677.9T patent/DE112022001677A5/de active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102012201674A1 (de) * | 2011-02-24 | 2012-08-30 | Schaeffler Technologies AG & Co. KG | Ausrücksystem zur hydraulischen Betätigung einer Kupplung |
| WO2017194056A1 (de) * | 2016-05-11 | 2017-11-16 | Schaeffler Technologies AG & Co. KG | Nehmerzylinder für eine betätigungseinrichtung einer reibkupplung |
| DE102018102450A1 (de) * | 2018-02-05 | 2019-08-08 | Schaeffler Technologies AG & Co. KG | Betätigungsanordnung mit durch schraubenlose Verbindung gefügtem und zentriertem Gehäuse eines Nehmerzylinders; sowie Kupplungssystem |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102023132057A1 (de) * | 2023-11-17 | 2025-05-22 | Schaeffler Technologies AG & Co. KG | Geführtes Ausrücklager und Ausrückvorrichtung sowie Kupplungsvorrichtung mit geführtem Ausrücklager |
Also Published As
| Publication number | Publication date |
|---|---|
| DE112022001677A5 (de) | 2024-01-11 |
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