WO2018036583A1 - Geberzylinder - Google Patents
Geberzylinder Download PDFInfo
- Publication number
- WO2018036583A1 WO2018036583A1 PCT/DE2017/100646 DE2017100646W WO2018036583A1 WO 2018036583 A1 WO2018036583 A1 WO 2018036583A1 DE 2017100646 W DE2017100646 W DE 2017100646W WO 2018036583 A1 WO2018036583 A1 WO 2018036583A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- master cylinder
- sniffer
- region
- cylinder housing
- profile
- 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
- F16D25/00—Fluid-actuated clutches
- F16D25/08—Fluid-actuated clutches with fluid-actuated member not rotating with a clutching member
-
- 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
- F16D2025/081—Hydraulic devices that initiate movement of pistons in secondary cylinders for actuating clutches, i.e. primary cylinders
-
- 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
- F16D2300/00—Special features for couplings or clutches
- F16D2300/08—Details or arrangements of sealings not provided for in group F16D3/84
Definitions
- the invention relates to a master cylinder for an actuator of an actuator for a friction clutch of a motor vehicle.
- Such friction clutches serve in particular to interrupt a torque flow from a drive motor to a drive train of a motor vehicle.
- actuating devices with a master cylinder and a slave cylinder are known, which are connected to each other via a hydraulic path.
- the master cylinder is actuated by means of a clutch pedal by a driver of the motor vehicle.
- a hydraulic fluid is displaced from the master cylinder via the hydraulic path to the slave cylinder, which disengages and / or engages the friction clutch.
- the slave cylinder may be, for example, a central release, abbreviated CSC.
- actuators for the friction clutch which have an additional actuator.
- This enables a so-called “sailing function", by means of which the drive motor of the motor vehicle can be switched off by opening the clutch during coasting, whereby the slave cylinder is connected to the master cylinder and the actuator so that both the master cylinder and the actuator control the slave cylinder and
- the master cylinder and the actuator are arranged in series, so that a transfer between the actuator and the master cylinder and vice versa is possible.
- Master cylinder for an actuator of an actuator for a friction clutch of a motor vehicle in particular of pressure medium actuation devices, such as in particular of hydraulic actuation arrangements, have a master cylinder housing with a cylinder with a piston arranged displaceably therein , Where- at least one seal arrangement is provided between a piston wall and a cylinder wall of the master cylinder housing to ensure a seal between the piston and the cylinder.
- annular seals are used, which are used in an annular groove of a wall of the piston or of the cylinder and are sealingly supported during operation of the master cylinder both on a wall of the piston and of the cylinder.
- the seal typically has a static sealing lip, which is supported substantially statically on a wall.
- the seal has a movement sealing lip, which in a relative movement of the piston wall and cylinder wall on one of the two Wandüngen slidably. It is also known in the operation of such master cylinder, that the piston is moved to a so-called snooping in a specific position, by releasing a arranged in the master cylinder housing bore, the so-called sniffer bore, a volume balance of a pressure medium between a working pressure chamber, hereinafter also only briefly referred to as the pressure chamber of the master cylinder and a pressure medium reservoir to be able to guarantee. This snooping action is necessary, for example, to compensate for or eliminate effects that are considered undesirable and affect the controllability of the system.
- the thermal expansion of the pressure medium lead to a displacement of the piston zero position, which is compensated by the so-called sniffing and the associated volume compensation, because the volume is defined in the working pressure chamber compensated.
- the sniffing process for volume compensation can be done quickly and reliably because a predetermined amount of time is required for this operation to move the piston to the sniffer position and remain in that position Completion of the snooping process assumes that the volume compensation actually took place effectively.
- a quick snooping process is necessary, because this process must be carried out during normal operation and therefore no loss of quality in the controllability and responsiveness of the system would be accepted in this time required.
- the seal of the master cylinder should ensure a reliable sealing function between the piston and cylinder wall during normal operation and in a so-called sniffing process should a secure volume compensation of the pressure medium between the working pressure chamber and the pressure medium reservoir can be done.
- a master cylinder for an actuator of an actuating device for a friction clutch of a motor vehicle having the features of claim 1.
- Preferred embodiments of the invention are specified in the subclaims, which individually or in combination may constitute an aspect of the invention
- the invention relates to a master cylinder for an actuator for actuating a friction clutch, comprising a master cylinder housing in which a piston is axially displaceable, and a primary seal for sealing against leakage, wherein the primary seal between an inner wall of the master cylinder housing and the piston is arranged, wherein the master cylinder housing comprises at least one Schnüffelnut extending in the axial direction of the master cylinder housing, wherein on the Schnüffelnut a sniffer area is arranged to allow a deformation-free parking position of the seal.
- a sniffer geometry for master cylinder can be defined so that the primary seal in a parking position does not suffer damage.
- the primary seal can seal a sniffer bore of the sniffer groove and thus a working fluid reservoir against a pressure chamber of the master cylinder.
- the primary seal can be arranged between a piston and the master cylinder housing.
- the sniffer region can have a rotational profile, which is connected to a local depression of the so-called sniffing groove.
- the master cylinder housing may comprise a plurality of sniffer grooves which are arranged around the circumference of the master cylinder housing, wherein a sniffer region is arranged on each sniffer groove.
- Such a configuration makes it possible to avoid the otherwise usual deformations in a parked position, so that no freezing of the deformed shape can take place even in the event of a temperature drop
- the primary seal contacts the parking when parking
- a master cylinder can be provided, which ensures a secure volume compensation, in particular after a lifetime in a parking position.
- an optimized sniffer geometry can be provided, which allows the primary seal in the parking position has no negative deformation.
- additional components and processing steps can be saved by a master cylinder designed in this way.
- the sniffer region of the master cylinder housing arranged on the sniffer groove projects from a starting position, in particular a parking position of the master cylinder Piston extends to a specified Schnüffelddling. This allows a more accurate definition of the snoop position. In particular, it can be determined from which point in time the primary seal can contact the sniffer groove.
- the sniffer region of the master cylinder housing arranged at the sniffer groove has a substantially concave or conical profile. In this way, a simpler installation of the seal can be made possible. Furthermore, a simpler snooping can be made possible.
- the sniffer region of the master cylinder housing arranged at the sniffer groove has at least one first profile region, preferably a first profile region and a third profile region, the first profile region and the third profile region being conical, with a cylindrical second profile region extending in the axial direction is arranged adjacent to the first profile region, preferably between the first profile region and the third profile region is arranged. Due to the conical configuration of the first profile region and the third profile region, the assembly of the seal can be simplified.
- the first profile region and the third profile region of the sniffer region of the master cylinder housing arranged on the sniffer groove are each of concave design. In this way, a simpler installation of the seal can be made possible. Furthermore, a simpler snooping can be made possible.
- a rounding is arranged at the transition between the Schnüffelnut and the sniffer area, in particular at the transition between the Schnüffelnut and the first profile area. In this way, the durability of the primary seal can be increased.
- the master cylinder housing can be produced by a primary molding method, in particular by injection molding.
- the master cylinder housing made of a plastic, in particular a thermo be made plast.
- the deformation of the primary seal in particular a sealing lip of the primary seal, from the parking position to a snoop point is progressive. As a result, the deformation increases more with increasing deformation.
- the invention further relates to an actuating device for a friction clutch, comprising a slave cylinder, a master cylinder, in particular a master cylinder, which may be formed or developed as above, wherein the slave cylinder is actuated by the master cylinder and the actuator.
- FIG. 1 is a perspective view of an actuator
- Fig. 2 is a perspective sectional view from the side of a master cylinder housing
- FIG. 5 shows detail A of the sniffer region of FIG. 4
- FIG. 6 shows a detail of a side view of a section through the sniffer area
- Fig. 8 is a detail view of a sectional view of the actuator in Schnüffelddling, and
- FIG. 9 is a detail view of a sectional view of the actuator during pressure build-up.
- the same reference symbols are used for the same terms / components.
- Fig. 1 shows a perspective sectional view of an actuator 10 for actuating a friction clutch, not shown.
- the actuator 10 has a housing 12 in which a piston 14 is arranged axially movable.
- the piston 14 comprises a piston receiver 16.
- the piston receiver 16 is arranged on a spindle 18, via which the piston receiver 16 can be moved axially on the spindle 18.
- the spindle 18 by a motor 20, in particular an electric motor, rotationally driven.
- the housing 12 has a partial section with a master cylinder housing 30.
- the piston 14 is retractable into the pressure chamber 22 of the master cylinder housing 30.
- the master cylinder housing 30 further has a first connection 24 for connecting the master cylinder to a reservoir (not shown) for a working fluid, for example a transmission oil.
- the actuator 10 in the region of the pressure chamber 22 has a second connection 26, via which the actuator 10 can be connected to the slave cylinder, not shown here.
- the piston 14 is also biased by a spring 28 against the piston 16 participants.
- FIG. 2 shows a perspective sectional view from the side of the master cylinder housing 30.
- the master cylinder housing 30 has a sniffer area 32 below the first terminal 24.
- FIG. 3 shows a detail of a plan view into the interior of the master cylinder housing 30. It can be seen that the encoder cylinder housing 30 comprises a plurality of radially arranged around the central axis of the master cylinder housing 30 sniffer grooves 34.
- FIG. 5 shows the detail A of FIG. 4. It can be seen in FIG. 5 that a respective sniffer groove 34 is connected to a respective sniffer region 32.
- the sniffer area 32 extends in the axial direction from a starting position, in particular a parking position of a seal of the master cylinder, to a sniffing point 38.
- a sniffer area 32 is arranged, which is divided into three profile areas 40, 42, 44.
- the third profile region 44 may be an insertion region which is conical in order to simplify the assembly of a seal.
- the second profile region 42 is a cylindrical region and the first profile region 40 has a cone profile.
- a rounding 36 is arranged.
- FIG. 8 shows a detailed view of a sectional view of the actuator 10 on which the primary seal 46 bears against the snub point 38. At the point of contact between the snub point 38 and the primary seal 46, the primary seal is progressively deformed by the tapered first profile section 40.
- 9 shows a detailed view of a sectional view of the actuator 10 during pressure build-up. It can be seen that the primary seal 46 is no longer located in the area of the sniffer area 32.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Hydraulic Clutches, Magnetic Clutches, Fluid Clutches, And Fluid Joints (AREA)
Abstract
Description
Claims
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE112017004189.9T DE112017004189B4 (de) | 2016-08-25 | 2017-08-01 | Geberzylinder |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102016215948.8 | 2016-08-25 | ||
| DE102016215948 | 2016-08-25 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2018036583A1 true WO2018036583A1 (de) | 2018-03-01 |
Family
ID=59626414
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/DE2017/100646 Ceased WO2018036583A1 (de) | 2016-08-25 | 2017-08-01 | Geberzylinder |
Country Status (2)
| Country | Link |
|---|---|
| DE (2) | DE112017004189B4 (de) |
| WO (1) | WO2018036583A1 (de) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20210381593A1 (en) * | 2018-10-26 | 2021-12-09 | Schaeffler Technologies AG & Co. KG | Actuator for a motor vehicle |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19523215A1 (de) | 1995-06-27 | 1997-01-02 | Schaeffler Waelzlager Kg | Ausbildung eines Kolbens für einen Geberzylinder |
| DE102013204561A1 (de) | 2012-04-12 | 2013-10-17 | Schaeffler Technologies AG & Co. KG | Dichtungsanordnung |
| DE102014215518A1 (de) * | 2014-08-06 | 2016-02-11 | Schaeffler Technologies AG & Co. KG | Geberzylinder mit Führungshülse für Dichtlippe des Schnüffelsystems |
| DE102014222640A1 (de) * | 2014-11-06 | 2016-05-12 | Schaeffler Technologies AG & Co. KG | Kolben-Zylinder-Anordnung für eine hydraulische Ausrückeinrichtung |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1301715B (de) * | 1966-04-26 | 1969-08-21 | Schottel Werft | Hydraulisches Gestaenge zum Betaetigen eines in einem Zylinder gefuehrten Kolbens |
| DE112014002766A5 (de) * | 2013-06-10 | 2016-03-03 | Schaeffler Technologies AG & Co. KG | Kolben-Zylinder-Anordnung für eine hydraulische Ausrückeinrichtung, insbesondere ein Geberzylinder für eine hydraulische Kupplungsbetätigungseinrichtung |
| DE102015224076A1 (de) * | 2015-12-02 | 2017-06-08 | Schaeffler Technologies AG & Co. KG | Nachlaufeinrichtung etwa eines Kupplungsgeberzylinders mit entspannter Dichtung in Parkposition |
-
2017
- 2017-08-01 DE DE112017004189.9T patent/DE112017004189B4/de active Active
- 2017-08-01 WO PCT/DE2017/100646 patent/WO2018036583A1/de not_active Ceased
- 2017-08-22 DE DE102017119117.8A patent/DE102017119117A1/de not_active Withdrawn
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19523215A1 (de) | 1995-06-27 | 1997-01-02 | Schaeffler Waelzlager Kg | Ausbildung eines Kolbens für einen Geberzylinder |
| DE102013204561A1 (de) | 2012-04-12 | 2013-10-17 | Schaeffler Technologies AG & Co. KG | Dichtungsanordnung |
| DE102014215518A1 (de) * | 2014-08-06 | 2016-02-11 | Schaeffler Technologies AG & Co. KG | Geberzylinder mit Führungshülse für Dichtlippe des Schnüffelsystems |
| DE102014222640A1 (de) * | 2014-11-06 | 2016-05-12 | Schaeffler Technologies AG & Co. KG | Kolben-Zylinder-Anordnung für eine hydraulische Ausrückeinrichtung |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20210381593A1 (en) * | 2018-10-26 | 2021-12-09 | Schaeffler Technologies AG & Co. KG | Actuator for a motor vehicle |
| US12055217B2 (en) * | 2018-10-26 | 2024-08-06 | Schaeffler Technologies AG & Co. KG | Actuator for a motor vehicle |
Also Published As
| Publication number | Publication date |
|---|---|
| DE112017004189B4 (de) | 2025-11-27 |
| DE112017004189A5 (de) | 2019-05-09 |
| DE102017119117A1 (de) | 2018-03-01 |
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